阅读说明：本技术 一种中间轴扭转装置及中间轴的加工方法 (Intermediate shaft torsion device and intermediate shaft machining method ) 是由 周裕 王重阳 孙海楼 梅丽莉 徐强 王丹 张峰 于 2020-05-25 设计创作，主要内容包括：本发明公开一种中间轴扭转装置及中间轴的加工方法,机架主体从上到下依次固连有顶部伺服电机和底部伺服电机,顶部伺服电机的输出端通过第一弹性联轴器与第一丝杠的一端相连,第一丝杠的另一端与第一轴承座B相连,底部伺服电机的输出端通过第二弹性联轴器与第二丝杠的一端相连,第二丝杠的另一端与第二轴承座B相连,第一轴承座A的两侧固连有导轨,导轨上依次连接有底板和弯板,底板的一侧与扭转机构固连,弯板的顶端与下端固定机构固连,机架主体远离导轨的一侧固连有支架,支架的顶部固连有夹持机构,本发明无需人工手动选配,提高了中间轴滑动力的一致性和稳定性,节省了人力,提高了生产的效力。(The invention discloses a middle shaft torsion device and a middle shaft processing method, wherein a rack main body is fixedly connected with a top servo motor and a bottom servo motor from top to bottom in sequence, the output end of the top servo motor is connected with one end of a first screw rod through a first elastic coupling, the other end of the first screw rod is connected with a first bearing seat B, the output end of the bottom servo motor is connected with one end of a second screw rod through a second elastic coupling, the other end of the second screw rod is connected with a second bearing seat B, two sides of the first bearing seat A are fixedly connected with guide rails, the guide rails are sequentially connected with a bottom plate and a bent plate, one side of the bottom plate is fixedly connected with a torsion mechanism, the top end of the bent plate is fixedly connected with a lower end fixing mechanism, one side of the rack main body, which is far away from the guide rails, is fixedly connected with a support, and the top of the support is fixedly connected with a clamping mechanism, manual selection and manual matching are not needed, and the consistency and the stability of the sliding force of the middle shaft are improved, saves manpower and improves production efficiency.)

1. An intermediate shaft torsion device is characterized in that: comprises a frame main body (1), a torsion mechanism (3), a lower end fixing mechanism (4), a clamping mechanism (5), a top servo motor (7) and a bottom servo motor (12), wherein the frame main body (1) is sequentially and fixedly connected with the top servo motor (7), a first bearing seat A (9), a first bearing seat B (10), a second bearing seat B (15), a second bearing seat A (14) and the bottom servo motor (12) from top to bottom, the output end of the top servo motor (7) is connected with one end of a first lead screw (11) through a first elastic coupling (8), one end of the first lead screw (11) is connected with the first bearing seat A (9), the other end of the first lead screw (11) is connected with the first bearing seat B (10), the output end of the bottom servo motor (12) is connected with one end of a second lead screw (16) through a second elastic coupling (13), one end of the second lead screw (16) is connected with the second bearing seat A (14), the other end of the second lead screw (16) is connected with the second bearing seat B (15), two sides of the first bearing seat A (9) are fixedly connected with guide rails (2), a bottom plate (1-1) and a bent plate (1-2) are sequentially connected onto the guide rails (2), one side of the bottom plate (1-1) is fixedly connected with a sliding block on the guide rails (2) and a lead screw seat on the first lead screw (11) respectively, the other side of the bottom plate (1-1) is fixedly connected with a torsion mechanism (3), one side of the bent plate (1-2) is fixedly connected with a sliding block on the guide rails (2) and a lead screw seat on the second lead screw (16) respectively, the upper surface of the bent plate (1-2) is fixedly connected with a lower end fixing mechanism (4), and the positions of the torsion mechanism (3) and the lower end fixing mechanism (4) are corresponding to each other, one side of the frame main body (1) departing from the guide rail (2) is fixedly connected with a support (1-3), and a clamping mechanism (5) is fixedly connected to the upper side of the support (1-3).

2. An intermediate shaft torsion device according to claim 1, wherein: the torsion mechanism (3) comprises a hydraulic motor (3-1), a coupler (3-2), a turntable (3-3), a rotating head (3-4) and a fixed shell (3-5), the body of the hydraulic motor (3-1) is connected with the top end of the fixed shell (3-5), the output shaft of the hydraulic motor (3-1) passes through the fixed shell (3-5) and is connected with one end of the coupler (3-2), the other end of the coupling (3-2) is connected with an input shaft of the turntable (3-3), one end of the rotary disc (3-3) far away from the input shaft is connected with the rotary head (3-4), the torsion mechanism (3) is fixedly connected with the bottom plate (1-1) through a fixed shell (3-5).

3. The countershaft twisting device according to claim 2, wherein a groove is formed at the joint of the rotary table (3-3) and the rotary head (3-4), the rotary head (3-4) is provided with a connector (3-4-1) which is matched with the groove on the rotary table (3-3) on the side close to the rotary table (3-3), an inner fork groove A (3-4-2) is formed in the rotary head (3-4), the inner fork groove A (3-4-2) is in the shape of an inner fork imitation shape, and a notch is formed in one side of the inner fork groove A (3-4-2).

4. The countershaft twisting device according to claim 1, wherein the lower end fixing mechanism (4) comprises a fixing head (4-1), a transition connecting plate (4-2) and a base (4-3), the fixing head (4-1) is connected with the transition connecting plate (4-2), slotted holes are uniformly and vertically formed in two sides of the transition connecting plate (4-2), slotted holes are vertically formed in the base (4-3) at positions corresponding to the transition connecting plate (4-2), bolts pass through the slotted holes in the transition connecting plate (4-2) and the slotted holes in the base (4-3) and are fixedly connected with the slotted holes, horizontal slotted holes are uniformly formed in the outer side of the vertical holes in the base (4-3), and the positions, corresponding to the base (4-3), of the tops of the bent plates (1-2) are horizontally formed in the bases (4-3) And a bolt passes through the horizontally arranged long round hole on the base (4-3) and is fixedly connected with the long round hole arranged at the top of the bent plate (1-2).

5. The countershaft twisting device according to claim 4, wherein a fixed connector (4-1-1) is disposed on a side of the fixed head (4-1) adjacent to the transition connecting plate (4-2), an inner forked groove B (4-1-2) is formed in the fixed head (4-1), the inner forked groove B (4-1-2) is shaped like an inner forked shape, a notch is formed in a side of the inner forked groove B (4-1-2), and a groove matched with the fixed connector (4-1-1) is formed in a side of the transition connecting plate (4-2) opposite to the fixed head (4-1).

6. The countershaft twisting device according to claim 1, wherein the clamping mechanism (5) comprises a first clamping jaw mechanism (5-1), a first cylinder connecting plate (5-2), a second clamping jaw mechanism (5-3), a fork tube anti-slipping mechanism (5-4), an air path distributor (5-5), an upper air cylinder (5-11), a lower air cylinder (5-11), a front air cylinder (5-12), a rear air cylinder (5-12), the first clamping jaw mechanism (5-1), the air path distributor (5-5) and the second clamping jaw mechanism (5-3) are fixedly connected to the first cylinder connecting plate (5-2) in sequence, the fork tube anti-slipping mechanism (5-4) is fixedly connected to the second clamping jaw mechanism (5-3), and a first connecting plate (5-6) is connected to one side of the first cylinder connecting plate (5-2) far away from the second clamping jaw mechanism (5-3), the piston connecting plate (5-7) and the first bearing (5-9) are sequentially connected onto the first connecting plate (5-6), the first bearing (5-9) is fixedly connected with a sliding block of the first guide rail (5-10), the first guide rail (5-10) is fixedly connected onto the second connecting plate (5-8), the second connecting plate (5-8) is fixedly connected with a third connecting plate (5-13), one side of the third connecting plate (5-13) is fixedly connected with an upper cylinder (5-11), a lower cylinder (5-11), a front cylinder (5-12) and a rear cylinder (5-14), a piston of the upper cylinder (5-11) and a piston of the lower cylinder (5-7) are fixedly connected with the piston connecting plate (5-7), and a cylinder body of the front cylinder (5-12) and a cylinder body of the rear cylinder (5-12) are fixedly connected with the second cylinder connecting plate (5-14), the piston of the front cylinder (5-12) and the piston of the rear cylinder (5-12) penetrate through the second cylinder connecting plate (5-14) and are fixedly connected with the support connecting plate (5-15), the support connecting plate (5-15) is fixedly connected with the top end of the support (1-3), the other side of the third connecting plate (5-13) is fixedly connected with the second guide rail, a sliding block of the second guide rail is fixedly connected with the second bearing (5-16), and the second bearing (5-16) is fixedly connected with the top end of the support (1-3).

7. An intermediate shaft torsion device according to claim 6, wherein the first jaw mechanism (5-1) and the second jaw mechanism (5-3) are identical in structure, and the first jaw mechanism (5-1) comprises: the clamping jaw comprises a pair of first clamping jaws (5-1-1), a pair of first elastic connecting pieces (5-1-2) and a first clamping jaw cylinder (5-1-3), wherein the pair of first clamping jaws (5-1-1) are fixedly connected to the first clamping jaw cylinder (5-1-3) through the pair of first elastic connecting pieces (5-1-2), the first elastic connecting pieces (5-1-2) comprise first clamping groove connecting pieces (5-1-2-1), first elastic pieces (5-1-2-2) and first fixing pieces (5-1-2-3), T-shaped clamping grooves are formed in the first clamping groove connecting pieces (5-1-2-1), and the tail portions of the first clamping jaws (5-1-1) and the first clamping groove connecting pieces (5-1-1) are connected through the T-shaped clamping grooves 2-1), the first clamping groove connecting piece (5-1-2-1), the first elastic piece (5-1-2-2) and the first fixing piece (5-1-2-3) are fixedly connected with the first clamping jaw cylinder (5-1-3) through bolts, and the first clamping jaw cylinder (5-1-3) is fixedly connected with the first cylinder connecting plate (5-2).

8. The jackshaft torsion device according to claim 6 or 7, wherein the fork tube anti-slip mechanism (5-4) comprises an anti-slip baffle (5-4-1), a baffle connecting plate (5-4-2), an anti-slip body (5-4-3), a plug pin (5-4-4), an anti-slip fixing plate (5-4-5) and an outer fork support plate (5-4-6), the anti-slip baffle (5-4-1) is fixedly connected with the baffle connecting plate (5-4-2), the baffle connecting plate (5-4-2) is fixedly connected with the anti-slip body (5-4-3), the bottom end of the anti-slip body (5-4-3) is fixedly connected with the outer fork support plate (5-4-6), the front end of the outer fork supporting plate (5-4-6) is in a step shape, the front end of the anti-slip baffle (5-4-1) is in an arc shape, the width of the arc shape is the same as the diameter of the middle shaft fork tube (6-1-1), the upper end of the anti-slip main body (5-4-3) is in a concave shape, the upper end of the anti-slip main body (5-4-3) is connected with the anti-slip fixing plate (5-4-5) through the plug pin (5-4-4), and the anti-slip fixing plate (5-4-5) is fixedly connected with the second clamping jaw cylinder (5-3-3) on the second clamping jaw mechanism (5-3).

9. A processing method of an intermediate shaft is characterized in that: the method comprises the following steps:

s1: the injection molding layer is coated at the front end of the fork shaft (6-2-1) of the fork shaft assembly (6-2) in a hot pressing or injection molding manner;

s2: pressing a fork shaft assembly (6-2) with an injection molding layer into a fork tube (6-1-1) of the fork tube assembly (6-1);

s3: vertically fixing the pressed middle shaft (6) on a tray of a production line, wherein a fork tube assembly (6-1) faces upwards, and a fork shaft assembly (6-2) faces downwards;

s4: a first clamping jaw (5-1-1) on the clamping mechanism (5) clamps a fork tube assembly (6-1) through a first clamping jaw cylinder (5-1-3), a second clamping jaw (5-3-1) clamps a fork shaft assembly (6-2) through a second clamping jaw cylinder (5-3-3), and the clamping mechanism (5) moves an intermediate shaft (6) to a working position through an upper cylinder (5-11), a lower cylinder (5-11) and a front cylinder (5-12) and a rear cylinder (12);

s5: the top servo motor drives the torsion mechanism (3) to move downwards along the track (2) and is sleeved on an inner fork of the fork tube assembly (6-1), so that the inner fork (6-3) on the fork tube assembly (6-1) is connected with the rotating head (3-4) on the rotating mechanism (3);

s6: the bottom servo motor drives the lower end fixing mechanism (4) to move upwards along the track (2) and is sleeved on an inner fork of the fork shaft assembly (6-2), so that the inner fork on the fork shaft assembly is connected with a fixing head (4-1) on the lower end fixing mechanism (4);

s7: moving a heater of the heating device to a position needing to be heated of the middle shaft (6), and heating an injection molding layer of the fork shaft assembly (6-2) through the fork tube assembly (6-1), wherein the heating temperature is 60-200 ℃;

s8: after the heating is carried out to the set temperature, a first clamping jaw (5-1) and a second clamping jaw (5-5) on the clamping mechanism (5) loosen the intermediate shaft (6) under the action of a first clamping jaw cylinder (5-3) and a second clamping jaw cylinder (5-7);

s9: the lower end fixing mechanism (4) and a fork shaft assembly (6-2) connected with the lower end fixing mechanism (4) are fixed, a hydraulic motor (3-1) on the torsion mechanism (3) drives the rotating head (3-4) and a fork pipe assembly (6-1) connected with the rotating head (3-4) to rotate forwards, and when the forward rotation reaches a set value of torque, the reverse rotation is carried out;

s10: when the reverse rotation reaches a set value of the torque, the hydraulic motor (3-1) drives the rotating head (3-4) to return to the original position;

s11: a first clamping jaw (5-1-1) and a second clamping jaw (5-3-1) on the clamping mechanism (5) clamp the intermediate shaft (6) under the action of a first clamping jaw cylinder (5-1-3) and a second clamping jaw cylinder (5-3-3), a cooling air valve on the device is opened, and an air channel distributor (5-5) on the clamping mechanism (5) starts to blow and cool a product;

s12: the heater of the heating device returns to the original position, the top servo motor drives the torsion mechanism (3) to move upwards along the track (2) and return to the original position, and the bottom servo motor drives the lower end fixing mechanism (4) to move downwards along the guide rail (2) and return to the original position;

s13: after the middle shaft is cooled, the middle shaft (6) is moved to a tray by the clamping mechanism (5) through the upper and lower air cylinders (5-11) and the front and rear air cylinders (5-12), the cooling air valve is closed, the middle shaft is loosened by the first clamping jaw (5-1-1) and the second clamping jaw (5-3-1), and the middle shaft returns to the original position through the upper and lower air cylinders (5-11) and the front and rear air cylinders (5-12).

10. A method of machining an intermediate shaft according to claim 9, wherein: the thickness of the fork shaft injection molding layer is 0.5mm, and the pressure for pressing the fork shaft assembly (6-2) with the injection molding layer into the fork pipe (6-1-1) of the fork pipe assembly (6-1) is larger than 350N and smaller than 1000N.

Technical Field

The invention relates to the field of middle shaft machining devices, in particular to a middle shaft torsion device and a middle shaft machining method.

Background

With the rapid development of economy and the improvement of living standards of people, automobiles become indispensable vehicles, an intermediate shaft is a shaft connected between a steering gear and a steering column and is an important component in a steering system, the intermediate shaft has the function of transmitting torque and a corner output by a steering wheel, and is collapsed when a frontal collision occurs to a vehicle, so that the safety of a driver is protected, as shown in fig. 5, the intermediate shaft is composed of a fork tube assembly 6-1 and a fork shaft assembly 6-2, the fork tube assembly 6-1 is composed of a fork tube 6-1-1, an inner fork 6-3, an outer fork 6-4 and a cross bearing, the fork shaft assembly 6-2 is composed of a fork shaft 6-2-1, an inner fork 6-3, an outer fork 6-4 and a cross bearing, and the existing intermediate shaft is processed, because each fork shaft 6-2-1 and each fork tube 6-1-1 are influenced by machining tolerance, the sliding force of the fork tube assembly 6-1 and the fork shaft assembly 6-2 after press fitting is uncertain, and because certain errors exist in the assembling process, the assembling clearance is too large or too small, the quality of a product is unstable, and manual matching is needed to meet the sliding force requirement required by a customer.

However, the manual matching of the intermediate shaft has the following defects: the method has the advantages that firstly, the middle shaft is manually selected and matched, the consistency and stability of sliding force are poor, secondly, the product quality problem can be caused by factors which cannot be determined such as manpower and the like, thirdly, a large amount of manpower and material resources are wasted, the production period is long, and the production efficiency is low.

Disclosure of Invention

The invention aims to solve the defects and shortcomings in the prior art and provides an intermediate shaft torsion device and an intermediate shaft machining method.

In order to achieve the purpose, the invention provides the following technical scheme:

a middle shaft torsion device comprises a rack main body, a torsion mechanism, a lower end fixing mechanism, a clamping mechanism, a top servo motor and a bottom servo motor, wherein the rack main body is fixedly connected with the top servo motor, a first bearing seat A, a first bearing seat B, a second bearing seat A and the bottom servo motor from top to bottom in sequence, the output end of the top servo motor is connected with one end of a first lead screw through a first elastic coupling, one end of the first lead screw is connected with the first bearing seat A, the other end of the first lead screw is connected with the first bearing seat B, the output end of the bottom servo motor is connected with one end of a second lead screw through a second elastic coupling, one end of the second lead screw is connected with the second bearing seat A, the other end of the second lead screw is connected with the second bearing seat B, guide rails are fixedly connected with the two sides of the first bearing seat A, the improved rack is characterized in that a bottom plate and a bent plate are sequentially connected onto the guide rail, one side of the bottom plate is fixedly connected with a sliding block on the guide rail and a lead screw seat on a first lead screw, the other side of the bottom plate is fixedly connected with a torsion mechanism, one side of the bent plate is fixedly connected with the sliding block on the guide rail and the lead screw seat on a second lead screw, the upper surface of the bent plate is fixedly connected with a lower end fixing mechanism, the torsion mechanism is corresponding to the lower end fixing mechanism in position, a support is fixedly connected to one side, deviating from the guide rail, of the rack body, and a clamping mechanism is fixedly connected to the upper surface of the support.

Torsion mechanism includes that hydraulic motor, shaft coupling, carousel, rotating head and fixed shell constitute, hydraulic motor's fuselage links to each other with the top of fixed shell, hydraulic motor's output shaft passes the one end of fixed shell and shaft coupling links to each other, the other end of shaft coupling links to each other with the input shaft of carousel, the one end that the input shaft was kept away from to the carousel links to each other with the rotating head, torsion mechanism links firmly with the bottom plate through fixed shell.

The carousel is equipped with the recess with the junction of rotating head, the rotating head close on one side of carousel, have with recess matched with connector on the carousel, processing has interior fork groove A in the rotating head, interior fork groove A's shape is for imitating interior fork appearance shape, one side processing of interior fork groove A has the opening.

Lower extreme fixed establishment includes fixed head, transition connecting plate and base, the fixed head with the transition connecting plate links to each other, the vertical slotted hole that is provided with of both sides equipartition of transition connecting plate, the base with the corresponding position of transition connecting plate is also vertical to be provided with the slotted hole, and the bolt passes through slotted hole on the transition connecting plate with slotted hole on the base makes it link firmly, the outside equipartition of the vertical slotted hole of base is provided with the horizontally slotted hole, the top of bent plate with the corresponding position of base also level is provided with the slotted hole, and the bolt passes through the slotted hole that the base upper level set up with the slotted hole that the bent plate top set up makes it link firmly.

One side that the fixed head closes on the transition connecting plate has fixed connector, fork groove B in the fixed head processing, the shape of interior fork groove B is for imitating interior fork appearance shape, one side processing of interior fork groove B has the opening, the last one side processing of relative fixed head of transition connecting plate has the recess with fixed connector matched with.

The clamping mechanism comprises a first clamping jaw mechanism, a first cylinder connecting plate, a second clamping jaw mechanism, a fork tube anti-slipping mechanism, an air channel distributor, an upper air cylinder, a lower air cylinder, a front air cylinder, a rear air cylinder, a fork tube anti-slipping mechanism, an air channel distributor, a front air cylinder, a rear air cylinder, a piston connecting plate and a first bearing are sequentially connected onto the first connecting plate, the fork tube anti-slipping mechanism is fixedly connected onto the second clamping jaw mechanism, one side of the first cylinder connecting plate, which is far away from the second clamping jaw mechanism, is connected with the first connecting plate, a piston connecting plate and a first bearing are sequentially connected onto the first connecting plate, the first bearing is fixedly connected with a sliding block of the first guide rail, the first guide rail is fixedly connected onto the second connecting plate, a third connecting plate is fixedly connected onto the second connecting plate, the upper air cylinder, the rear air cylinder and the second air cylinder are fixedly connected onto one side of the third connecting plate, pistons of the upper air cylinder and the lower air cylinder are fixedly connected with the piston connecting plate, the cylinder body of front and back cylinder links firmly with the second cylinder connecting plate, the piston of front and back cylinder passes the second cylinder connecting plate and links firmly with the leg joint board, the leg joint board links firmly with the top of support, the opposite side of third connecting plate has linked firmly the second guide rail, the slider and the second bearing of second guide rail link firmly, the second bearing links firmly with the top of support.

The first gripper mechanism and the second gripper mechanism have the same structure, and the first gripper mechanism comprises: a pair of first clamping jaw, a pair of first elastic connection spare and first clamping jaw cylinder, a pair of first clamping jaw link firmly jointly through a pair of first elastic connection spare on the first clamping jaw cylinder, first elastic connection spare includes first draw-in groove connecting piece, first elastic component and first mounting, have "T" type draw-in groove on the first draw-in groove connecting piece, the afterbody of first clamping jaw through "T" type draw-in groove with first draw-in groove connecting piece links to each other, first draw-in groove connecting piece, first elastic component and first mounting pass through the bolt with first clamping jaw cylinder links firmly, first clamping jaw cylinder links firmly with first cylinder connecting plate.

The fork tube anti-slip mechanism comprises an anti-slip baffle, a baffle connecting plate, an anti-slip main body, a plug pin, an anti-slip fixing plate and an outer fork supporting plate, wherein the anti-slip baffle is fixedly connected with the baffle connecting plate, the baffle connecting plate is fixedly connected with the anti-slip main body, the bottom end of the anti-slip main body is fixedly connected with the outer fork supporting plate, the front end of the outer fork supporting plate is in a ladder shape, the front end of the anti-slip baffle is in an arc shape, the width of the arc shape is the same as the diameter of the middle shaft fork tube, the upper end of the anti-slip main body is in a concave shape, the upper end of the anti-slip main body is connected with the anti-slip fixing plate through the plug pin, and the anti-slip fixing plate is fixedly connected with a second clamping jaw cylinder on the second clamping jaw mechanism.

A processing method of an intermediate shaft is characterized in that: the method comprises the following steps:

s1: hot-pressing or injection-molding the injection-molded layer to coat the front end of the fork shaft assembly;

s2: pressing the fork shaft assembly with the injection molding layer into a fork tube of the fork tube assembly;

s3: vertically fixing the pressed intermediate shaft on a tray of a production line, wherein a fork tube assembly faces upwards, and a fork shaft assembly faces downwards;

s4: a first clamping jaw on the clamping mechanism clamps the fork tube assembly through a first clamping jaw air cylinder, a second clamping jaw clamps the fork shaft assembly through a second clamping jaw air cylinder, and the clamping mechanism moves the intermediate shaft to a working position through an upper air cylinder, a lower air cylinder, a front air cylinder and a rear air cylinder;

s5: the top servo motor drives the torsion mechanism to move downwards along the track and is sleeved on the inner fork of the fork tube assembly, so that the inner fork on the fork tube assembly is connected with the rotating head on the rotating mechanism;

s6: the bottom servo motor drives the lower end fixing mechanism to move upwards along the track and is sleeved on the inner fork of the fork shaft assembly, so that the inner fork on the fork shaft assembly is connected with the fixing head on the lower end fixing mechanism;

s7: moving a heater of a heating device to a position, which needs to be heated, of an intermediate shaft, and heating an injection molding layer of a fork shaft assembly through a fork pipe assembly, wherein the heating temperature is 60-200 ℃;

s8: after the heating is carried out to the set temperature, the first clamping jaw and the second clamping jaw on the clamping mechanism loosen the intermediate shaft under the action of the first clamping jaw cylinder and the second clamping jaw cylinder;

s9: the lower end fixing mechanism and a fork shaft assembly connected with the lower end fixing mechanism are fixed, a hydraulic motor on the torsion mechanism drives the rotating head and a fork pipe assembly connected with the rotating head to rotate forwards, and when the forward rotation reaches a set value of torque, the forward rotation is carried out;

s10: when the reverse rotation reaches a set value of the torque, the hydraulic motor drives the rotating head to return to the original position;

s11: a first clamping jaw and a second clamping jaw on the clamping mechanism clamp the intermediate shaft under the action of a first clamping jaw cylinder and a second clamping jaw cylinder, a cooling air valve on the device is opened, and an air channel distributor on the clamping mechanism starts to blow air and cool a product;

s12: the heater of the heating device returns to the original position, the top servo motor drives the torsion mechanism to move upwards along the track and return to the original position, and the bottom servo motor drives the lower end fixing mechanism to move downwards along the guide rail and return to the original position;

s13: after the jackshaft cools off, fixture removes the jackshaft to the tray through last lower cylinder and front and back cylinder on, the cooling air valve is closed, and first clamping jaw and second clamping jaw loosen the jackshaft to return the normal position through last lower cylinder and front and back cylinder.

The thickness of the fork shaft injection molding layer is 0.5mm, and the pressure for pressing the fork shaft assembly with the injection molding layer into the fork pipe of the fork pipe assembly is more than 350N and less than 1000N.

The invention has the advantages and beneficial effects that:

1. according to the invention, the fork tube assembly and the fork shaft assembly do not need to be manually selected and matched, the middle shaft is vertically clamped by the clamping mechanism after the fork shaft assembly is pressed into the fork tube assembly, and is twisted through the mutual matching of the twisting mechanism and the lower end fixing mechanism, so that the gaps between the fork tube assembly and the fork shaft assembly are consistent, and the product quality is stable.

2. The invention changes the output torque of the hydraulic motor by adjusting the pressure and the flow of the hydraulic motor in the torsion mechanism, adjusts the sliding force of the intermediate shaft by adjusting the heating temperature of the intermediate shaft through the heating equipment, and achieves the consistency of the sliding force and the stability of the product because the torque of the hydraulic motor is large and the torque output is stable.

3. The inner fork groove of the upper rotating head is designed to imitate the shape of the inner fork, and torque is applied to the fork tube assembly as much as possible, so that when the rotating head is sleeved on the inner fork of the fork tube assembly to rotate, the outer fork can not be influenced by any external twisting force in the twisting process of a product, and the damage of the cross shaft caused by large torque is prevented. If the fit clearance between the rotating head and the inner fork is too large, the inner fork can move relatively to the rotating head in the rotating head, and the heating torsion process is failed.

4. The invention has simple operation, greatly reduces the production period of products and improves the production efficiency.

5. Because the thicknesses of the intermediate shafts are different, the invention can realize the processing of different intermediate shafts by replacing the rotating head, the fixed head and the clamping jaw.

Drawings

FIG. 1 is a schematic diagram of the overall structure of the present invention;

FIG. 2 is an exploded view of the torsion mechanism of the present invention;

FIG. 3 is an exploded view of the lower end fixing mechanism of the present invention;

FIG. 4 is a schematic view of the combination of the rotating head, the intermediate shaft and the fixed head of the present invention;

FIG. 5 is an exploded view of the rotary head, intermediate shaft and lower end fixing mechanism of the present invention in combination;

FIG. 6 is a schematic structural view of a clamping mechanism according to the present invention;

FIG. 7 is an exploded view of the clamping mechanism of the present invention;

fig. 8 is an exploded view of the fork tube anti-slip mechanism of the present invention.

Reference numerals: 1 frame main body, 1-1 bottom plate, 1-2 bent plate, 1-3 support, 2 guide rail, 3 torsion mechanism, 3-1 hydraulic motor, 3-2 coupler, 3-3 rotary table, 3-4 rotary head, 3-4-1 connector, 3-4-2 internal fork groove A, 3-5 fixed mount, 4 lower end fixing mechanism, 4-1 fixing head, 4-1-1 fixing connector, 4-1-2 internal fork groove B, 4-2 transition connecting plate, 4-3 base, 5 clamping mechanism, 5-1 first clamping jaw mechanism, 5-1-1 first clamping jaw, 5-1-2 first elastic connecting piece, 5-1-2-1 first clamping groove connecting piece, 5-1-2-2 first elastic piece, 5-1-2-3 first fixing piece, 5-1-3 first clamping jaw air cylinder, 5-2 first air cylinder connecting plate, 5-3-1 second clamping jaw, 5-3-2 second elastic connecting piece, 5-3-2-1 second clamping groove connecting piece, 5-3-2-2 second elastic piece, 5-3-2-3 second fixing piece, 5-3-3 second clamping jaw air cylinder, 5-4 fork tube anti-slip mechanism, 5-4-1 anti-slip baffle, 5-4-2 baffle connecting plate, 5-4-3 anti-slip main body, 5-4-4 plug pin, 5-4-5 anti-slip fixing plate, 5-4-6 outer fork supporting plate, 5-5 air path distributor, 5-6 first connecting plates, 5-7 piston connecting plates, 5-8 second connecting plates, 5-9 first bearings, 5-10 first guide rails, 5-11 upper and lower cylinders, 5-12 front and rear cylinders, 5-13 third connecting plates, 5-14 second cylinder connecting plates, 5-15 bracket connecting plates, 5-16 second bearings, 6 intermediate shafts, 6-1 fork tube assemblies and 6-1-1 fork tubes, the device comprises a 6-2 fork shaft assembly, a 6-2-1 fork shaft, a 6-3 inner fork, a 6-4 outer fork, a top servo motor 7, a first elastic coupling 8, a first bearing seat A9, a first bearing seat B10, a first lead screw 11, a bottom servo motor 12, a second elastic coupling 13, a second bearing seat A14, a second bearing seat B15 and a second lead screw 16.

Detailed Description

The invention is described in detail below with reference to the accompanying drawings, and it is to be understood that the invention is not limited in its application to the details of construction and to the arrangements of the components of the method, and that the invention is not limited in its application to the details of construction and to the arrangements of the components of the method.

It should be noted that in the description of the present invention, the terms "upper", "lower", "front", "rear", "vertical", "horizontal", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

As shown in fig. 1, an intermediate shaft torsion device comprises a frame main body 1, a torsion mechanism 3, a lower end fixing mechanism 4, a clamping mechanism 5, a top servo motor 7 and a bottom servo motor 12, wherein the frame main body 1 is fixedly connected with the top servo motor 7, a first bearing seat a9, a first bearing seat B10, a second bearing seat B15, a second bearing seat a14 and the bottom servo motor 12 from top to bottom in sequence, an output end of the top servo motor 7 is connected with one end of a first lead screw 11 through a first elastic coupling 8, one end of the first lead screw 11 is connected with the first bearing seat a9, the other end of the first lead screw 11 is connected with a first bearing seat B10, an output end of the bottom servo motor 12 is connected with one end of a second lead screw 16 through a second elastic coupling 13, one end of the second lead screw 16 is connected with a second bearing seat a14, the other end of the second lead screw 16 is connected with a second bearing seat B15, the guide rail 2 is fixedly connected to two sides of the first bearing seat A9, a bottom plate 1-1 and a bent plate 1-2 are sequentially connected to the guide rail 2, one side of the bottom plate 1-1 is fixedly connected with a sliding block on the guide rail 2 and a screw seat on a first screw 11 respectively, the other side of the bottom plate 1-1 is fixedly connected with a torsion mechanism 3, one side of the bent plate 1-2 is fixedly connected with the sliding block on the guide rail 2 and the screw seat on a second screw 16 respectively, the upper surface of the bent plate 1-2 is fixedly connected with a lower end fixing mechanism 4, the torsion mechanism 3 corresponds to the lower end fixing mechanism 4 in position, a support 1-3 is fixedly connected to one side of the rack body 1 departing from the guide rail 2, and a clamping mechanism 5 is fixedly connected to the upper surface of the support 1-3.

As shown in fig. 2, the torsion mechanism 3 comprises a hydraulic motor 3-1, a coupler 3-2, a rotary table 3-3, a rotary head 3-4 and a fixed shell 3-5, wherein a body of the hydraulic motor 3-1 is connected with a top end of the fixed shell 3-5, an output shaft of the hydraulic motor 3-1 penetrates through the fixed shell 3-5 to be connected with one end of the coupler 3-2, the other end of the coupler 3-2 is connected with an input shaft of the rotary table 3-3, one end of the rotary table 3-3, which is far away from the input shaft, is connected with the rotary head 3-4, the torsion mechanism 3 is fixedly connected with the bottom plate 1-1 through the fixed shell 3-5, and the up-down movement of the torsion mechanism 3 is driven and controlled by a top servo motor 7.

As shown in figure 2, a groove is formed at the joint of the rotary table 3-3 and the rotary head 3-4, one side of the rotary head 3-4, which is close to the rotary table 3-3, is provided with a connector 3-4-1 which is matched with the groove on the rotary table 3-3, and the rotary table 3-3 and the connector 3-4-1 are connected through a straight pin so as to ensure that the rotary head 3-4 can be quickly replaced when middle shafts with different thicknesses are machined. Because the too large or too small fit clearance between the rotary head 3-4 and the inner fork can cause the relative movement of the inner fork and the rotary head 3-4 in the rotary head 3-4, which results in the failure of the heating and twisting process, the rotary head 3-4 needs to be replaced according to the thickness of the intermediate shaft, an inner fork groove A3-4-2 is processed in the rotary head 3-4, the shape of the inner fork groove A3-4-2 is the shape imitating the shape of the inner fork, which ensures the fit clearance between the rotary head and the inner fork, improves the heating and twisting efficiency, one side of the inner fork groove A3-4-2 is processed with a notch, which aims to apply the torque on the fork pipe assembly as much as possible, so that when the rotary head 3-4 is sleeved on the inner fork 6-3, the intermediate shaft 6 does not receive any twisting external force during the twisting process, the damage of the cross shaft caused by the large torque is prevented.

As shown in fig. 3, the lower end fixing mechanism 4 includes a fixing head 4-1, a transition connecting plate 4-2 and a base 4-3, the fixing head 4-1 is connected with the transition connecting plate 4-2, oblong holes are uniformly and vertically arranged on both sides of the transition connecting plate 4-2, oblong holes are also vertically arranged on the base 4-3 at positions corresponding to the transition connecting plate 4-2, bolts pass through the oblong holes on the transition connecting plate 4-2 and the oblong holes on the base 4-3 and are fixedly connected with the oblong holes, the vertical oblong holes on the transition connecting plate 4-2 and the base 4-3 can enable the fixing head 4-1 to be finely adjusted in the vertical direction relative to the base 4-3, and horizontal oblong holes are uniformly arranged on the outer sides of the vertical oblong holes of the base 4-3, the top of the bent plate 1-2 is also horizontally provided with a long round hole corresponding to the base 4-3, a bolt is fixedly connected with the long round hole arranged at the top of the bent plate 1-2 through the long round hole horizontally arranged on the base 4-3, the base 4-3 and the horizontal long round hole on the bent plate 1-2 can enable the lower end fixing mechanism 4 to be finely adjusted in the horizontal direction relative to the bent plate 1-2, and the up-and-down movement of the lower end fixing mechanism 4 is driven and controlled by a bottom servo motor 12.

As shown in fig. 3, one side of the fixed head 4-1 adjacent to the transition connecting plate 4-2 is provided with a fixed connector 4-1-1, an inner fork groove B4-1-2 is processed in the fixed head 4-1, the shape of the inner fork groove B4-1-2 is the shape of an imitated inner fork, one side of the inner fork groove B4-1-2 is provided with a notch, the purpose of the fixed head 4-1 is the same as that of the rotating head 3-4, a groove matched with the fixed connector 4-1-1 is processed on one side of the transition connecting plate 4-2 opposite to the fixed connector 4-1, the fixing head 4-1 is connected with the transition connecting plate 4-2 through a straight pin, so that the fixing head 4-1 can be quickly replaced when middle shafts with different thicknesses are machined.

As shown in fig. 6 and 7, the clamping mechanism 5 comprises a first clamping jaw mechanism 5-1, a first cylinder connecting plate 5-2, a second clamping jaw mechanism 5-3, a fork tube anti-slipping mechanism 5-4, an air path distributor 5-5, an upper cylinder 5-11, a lower cylinder 5-11 and a front cylinder 5-12 and a rear cylinder 5-12, the first clamping jaw mechanism 5-1, the air path distributor 5-5 and the second clamping jaw mechanism 5-3 are sequentially and fixedly connected to the first cylinder connecting plate 5-2, the air path distributor 5-5 is connected to a cooling air outlet of the device through a connecting pipe, the fork tube anti-slipping mechanism 5-4 is fixedly connected to the second clamping jaw mechanism 5-3, and a first connecting plate 5-6 is connected to one side of the first cylinder connecting plate 5-2 away from the second clamping jaw mechanism 5-3, the first connecting plate 5-6 is sequentially connected with a piston connecting plate 5-7 and a first bearing 5-9, the first bearing 5-9 is fixedly connected with a sliding block of a first guide rail 5-10, the first guide rail 5-10 is fixedly connected with a second connecting plate 5-8, the second connecting plate 5-8 is fixedly connected with a third connecting plate 5-13, one side of the third connecting plate 5-13 is fixedly connected with an upper cylinder 5-11, a lower cylinder 5-11, a front cylinder 5-12, a rear cylinder 5-12 and a second cylinder connecting plate 5-14, a piston of the upper cylinder 5-11 and the lower cylinder 5-7 are fixedly connected with the piston connecting plate 5-7, a cylinder body of the front cylinder 5-12 and the rear cylinder 5-14 are fixedly connected with the second cylinder connecting plate 5-14, and a piston of the front cylinder 5-12 and the rear cylinder 5-14 penetrate through the second cylinder connecting plate 5-14 to be fixedly connected with a support connecting plate 5-15, the support connecting plates 5-15 are fixedly connected with the top ends of the supports 1-3, the other sides of the third connecting plates 5-13 are fixedly connected with second guide rails, sliding blocks of the second guide rails are fixedly connected with second bearings 5-16, and the second bearings 5-16 are fixedly connected with the top ends of the supports 1-3. The clamping mechanism 5 achieves the purposes of up-and-down movement and back-and-forth movement through an up-and-down cylinder 5-11 and a front-and-back cylinder 5-12.

As shown in fig. 7, the first jaw mechanism 5-1 and the second jaw mechanism 5-3 have the same structure, and the first jaw mechanism 5-1 includes: the clamping jaw structure comprises a pair of first clamping jaws 5-1-1, a pair of first elastic connecting pieces 5-1-2 and a first clamping jaw cylinder 5-1-3, wherein the pair of first clamping jaws 5-1-1 are jointly fixedly connected to the first clamping jaw cylinder 5-1-3 through the pair of first elastic connecting pieces 5-1-2, the first elastic connecting pieces 5-1-2 are used for preventing a product from being damaged due to overlarge holding force of the first clamping jaws, each first elastic connecting piece 5-1-2 comprises a first clamping groove connecting piece 5-1-2-1, a first elastic piece 5-1-2-2 and a first fixing piece 5-1-2-3, each first clamping groove connecting piece 5-1-2-1 is provided with a T-shaped clamping groove, the tail part of the first clamping jaw 5-1-1 is connected with the first clamping groove connecting piece 5-1-2-1 through a T-shaped clamping groove, the first clamping groove connecting piece 5-1-2-1, the first elastic piece 5-1-2-2 and the first fixing piece 5-1-2-3 are fixedly connected with the first clamping jaw air cylinder 5-1-3 through bolts, the first clamping jaw air cylinder 5-1-3 is fixedly connected with the first air cylinder connecting plate 5-2, and the first elastic piece 5-1-2-2 is made of a tendon plate.

As shown in fig. 8, the fork tube anti-slip mechanism 5-4 comprises an anti-slip baffle 5-4-1, a baffle connecting plate 5-4-2, an anti-slip main body 5-4-3, a plug pin 5-4-4, an anti-slip fixing plate 5-4-5 and an outer fork supporting plate 5-4-6, wherein the anti-slip baffle 5-4-1 is fixedly connected with the baffle connecting plate 5-4-2, the baffle connecting plate 5-4-2 is fixedly connected with the anti-slip main body 5-4-3, the bottom end of the anti-slip main body 5-4-3 is fixedly connected with the outer fork supporting plate 5-4-6, the front end of the outer fork supporting plate 5-4-6 is stepped, in order to prevent the outer fork 6-4 in the fork shaft assembly 6-2 from slipping, if the outer fork 6-4 slides down, a product cannot enter the fixing head 4-1 in the lower end fixing mechanism 4, the front end of the anti-sliding baffle 5-4-1 is arc-shaped, the width of the arc is the same as the diameter of the middle shaft fork tube, the phenomenon that the fork tube assembly 6-2 automatically slides down under the action of gravity after the middle shaft is heated and twisted can be prevented due to the reduction of sliding force, the upper end of the anti-sliding main body 5-4-3 is concave, the upper end of the anti-sliding main body 5-4-3 is connected with the anti-sliding fixing plate 5-4-5 through the plug pin 5-4-4, and the anti-sliding fixing plate 5-4-5 is fixedly connected with the second clamping jaw cylinder 5-3-3 on the second clamping jaw mechanism 5-3.

The top servo motor 7, the bottom servo motor 12, the hydraulic motor 3-1, the upper and lower cylinders 5-11, the front and rear cylinders 5-12, the first clamping jaw cylinder 5-1-3 and the second clamping jaw cylinder 5-2-3 are controlled by a PLC program, and the PLC program triggers each function to start the electromagnetic valve to realize the flow of the whole process.

A processing method of an intermediate shaft is characterized in that: the method comprises the following steps:

s1: hot-pressing or injection-molding the injection-molded layer to coat the front end of a fork shaft 6-2-1 of a fork shaft assembly 6-2, wherein the thickness of the fork shaft injection-molded layer is 0.5 mm;

s2: pressing the fork shaft assembly 6-2 with the injection molding layer into a fork tube 6-1-1 of the fork tube assembly 6-1 by using pressure which is more than 350N and less than 1000N;

s3: vertically fixing the pressed intermediate shaft 6 on a tray of a production line, wherein a fork tube assembly 6-1 faces upwards, and a fork shaft assembly 6-2 faces downwards;

s4: a first clamping jaw 5-1-1 on the clamping mechanism 5 clamps a fork tube assembly 6-1 through a first clamping jaw cylinder 5-1-3, a second clamping jaw 5-3-1 clamps a fork shaft assembly 6-2 through a second clamping jaw cylinder 5-3-3, and the clamping mechanism 5 moves an intermediate shaft 6 to a working position through an upper cylinder 5-11, a lower cylinder 5-11 and a front cylinder 5-12 and a rear cylinder 5-12;

s5: the top servo motor drives the torsion mechanism 3 to move downwards along the track 2 and is sleeved on an inner fork of the fork tube assembly 6-1, so that the inner fork 6-3 on the fork tube assembly 6-1 is connected with the rotating head 3-4 on the rotating mechanism 3;

s6: the bottom servo motor drives the lower end fixing mechanism 4 to move upwards along the track 2 and is sleeved on an inner fork of the fork shaft assembly 6-2, and the fork shaft assembly 6-2 is fixed by connecting an inner fork 6-3 on the fork shaft assembly 6-2 with a fixing head 4-1 on the lower end fixing mechanism 4;

s7: moving a heater of a heating device to a position needing to be heated by the middle shaft 6, and heating the injection molding layer of the fork shaft assembly 6-2 through the fork tube assembly 6-1, wherein the heating temperature is 60-200 ℃ (the specific heating temperature depends on the sliding force technical requirement of the product and the material of the injection molding layer);

s8: after the heating to the set temperature, the first clamping jaw 5-1 and the second clamping jaw 5-5 on the clamping mechanism 5 loosen the intermediate shaft 6 under the action of the first clamping jaw cylinder 5-3 and the second clamping jaw cylinder 5-7;

s9: the lower end fixing mechanism 4 and a fork shaft assembly 6-2 connected with the lower end fixing mechanism 4 are fixed, a hydraulic motor 3-1 on the twisting mechanism 3 drives a rotating head 3-4 and a fork pipe assembly 6-1 connected with the rotating head 3-4 to rotate forwards at a set torque value, and when the forward rotation reaches a set torque value, the forward rotation is rotated backwards (the set torque value is set according to the processing tolerance of the fork pipe assembly 6-1 and the fork shaft assembly 6-2, and the set torque value is 30Nm-200 Nm);

s10: when the reverse rotation reaches a set value of the torque, the hydraulic motor 3-1 drives the rotary head 3-4 to return to the original position (the set value of the torque is between 30Nm and 200 Nm);

s11: a first clamping jaw 5-1-1 and a second clamping jaw 5-3-1 on the clamping mechanism 5 clamp the intermediate shaft 6 under the action of a first clamping jaw air cylinder 5-1-3 and a second clamping jaw air cylinder 5-3-3, a cooling air valve on the device is opened, and an air channel distributor 5-5 on the clamping mechanism 5 starts to blow air and cool a product;

s12: the heater of the heating device returns to the original position, the top servo motor drives the torsion mechanism 3 to move upwards along the track 2 and return to the original position, and the bottom servo motor drives the lower end fixing mechanism 4 to move downwards along the guide rail 2 and return to the original position;

s13: after the middle shaft is cooled, the middle shaft 6 is moved to the tray by the clamping mechanism 5 through the upper and lower air cylinders 5-11 and the front and rear air cylinders 5-12, the cooling air valve is closed, the middle shaft is loosened by the first clamping jaw 5-1-1 and the second clamping jaw 5-3-1, and the middle shaft returns to the original position through the upper and lower air cylinders 5-11 and the front and rear air cylinders 5-12.

It should be noted that the thickness of the injection layer at the front end of the fork shaft is the upper limit of the product design value, the fork shaft assembly is pressed into the fork shaft assembly by using the force which is more than 350N and less than 1000N, the injection layer cannot be scratched or damaged, and therefore when the fork shaft assembly is heated and twisted by using a heating device, the fit clearance and the sliding force between the fork shaft assembly and the fork shaft assembly can be consistent.