阅读说明：本技术 一种内孔同轴扩张工装 (Coaxial expansion frock of hole ) 是由 庄景飘 胡伟 庄景峰 陈小杨 于 2020-08-24 设计创作，主要内容包括：本发明公开了一种内孔同轴扩张工装,包括平行设置的下圆盘和上圆盘,下圆盘和上圆盘之间等角度固接有四组连接杆,下圆盘靠近上圆盘的一侧面转动连接有滚珠丝杆,滚珠丝杆外壁螺接有滑块组件,滑块组件外壁等角度滑动连接有支撑臂组件,支撑臂组件两端分别与下圆盘和上圆盘滑动连接,且支撑臂组件被配置为随着滑块组件的滑动而收回或扩张,本发明在进行两组管道的安装时,可以将本工装插入到管道内,并设置到两组管道的交界处,然后通过转动滚珠丝杆,并带动滑块组件上下滑动,从而带动支撑臂组件往复收缩和扩张,进而通过支撑臂组件对管道内壁的交界处进行支撑定位,从而保证两组管道间的同轴度。(The invention discloses a bore coaxial expansion tool, which comprises a lower disc and an upper disc which are arranged in parallel, wherein four groups of connecting rods are fixedly connected between the lower disc and the upper disc at equal angles, one side surface of the lower disc close to the upper disc is rotatably connected with a ball screw, the outer wall of the ball screw is in threaded connection with a slider assembly, the outer wall of the slider assembly is in equal-angle sliding connection with a support arm assembly, two ends of the support arm assembly are respectively in sliding connection with the lower disc and the upper disc, and the support arm assembly is configured to retract or expand along with the sliding of the slider assembly. Thereby ensuring the coaxiality between the two groups of pipelines.)

1. The utility model provides a coaxial expansion frock of hole which characterized in that: including parallel arrangement's lower disc (1) and last disc (2), the equiangular rigid coupling has four groups connecting rod (3) between lower disc (1) and last disc (2), a side that disc (1) is close to last disc (2) down rotates and is connected with ball screw (4), and ball screw (4) keep away from down disc (1) one end run through last disc (2) inner chamber, ball screw (4) outer wall spiro union has slider assembly (5), angular sliding connection such as slider assembly (5) outer wall has support arm subassembly (6), support arm subassembly (6) both ends respectively with lower disc (1) and last disc (2) sliding connection, and support arm subassembly (6) are configured to withdraw or expand along with the slip of slider assembly (5).

2. The coaxial expansion frock of hole of claim 1, characterized in that: the support arm assemblies (6) are provided with four groups, and the four groups of support arm assemblies (6) and the four groups of connecting rods (3) are arranged in a staggered mode.

3. The coaxial expansion frock of hole of claim 1, characterized in that: the sliding block component (5) comprises a sliding block (51), the sliding block (51) is in threaded connection with a ball screw (4), a plurality of groups of sliding grooves (52) are formed in the side wall of the sliding block (51) at equal angles, the two ends of each sliding groove (52) face to the lower disc (1) and the upper disc (2) respectively, the bottom of each sliding groove (52) is provided with an inclined angle, the inclined direction is from the upper disc (2) to the lower disc (1) in a concave inclined mode, a plurality of groups of fixing blocks (53) are fixedly connected to the outer wall of the sliding block (51) at equal angles, the fixing blocks (53) and the sliding grooves (52) are arranged in a one-to-one correspondence mode, each group of fixing blocks (53) is located on the same side edge of each group of sliding grooves (52), a stop block (54) is fixedly connected to one end, far away from the sliding block (51), of each group of, the inclination angle of the stop block (54) is consistent with that of the sliding chute (52), and the inclination direction of the stop block (54) is opposite to that of the sliding chute (52).

4. The coaxial expansion frock of hole of claim 3, characterized in that: support arm subassembly (6) include connecting plate (61), in connecting plate (61) one side embedding spout (52) and with slider (51) sliding connection, and connecting plate (61) are located down between disc (1) and last disc (2) and respectively with disc (1) and last disc (2) sliding connection down, the opposite side rigid coupling that connecting plate (62) one side is relative has support arm (62), and support arm (62) are located down disc (1) and last disc (2) outside, strip-shaped groove (63) of mutually supporting with dog (54) are seted up on connecting plate (61) surface, and strip-shaped groove (63) both ends are respectively towards disc (1) and last disc (2) down.

5. The coaxial expansion frock of hole of claim 4, characterized in that: the connecting plate (61) is close to the equal rigid coupling of both sides wall of lower disc (1) and last disc (2) and has stopper (64), disc (1) and last disc (2) all offer with stopper (64) mutually supporting spacing groove (7) down.

6. The coaxial expansion frock of hole of claim 4, characterized in that: one side wall of the connecting plate (61) embedded in the sliding groove (52) is provided with an inclination angle matched with the bottom of the sliding groove (52), and the strip-shaped groove (63) is provided with an inclination angle matched with the stop block (54).

7. The coaxial expansion frock of hole of claim 1, characterized in that: the center of one side face, close to each other, of the lower disc (1) and the upper disc (2) is provided with a ball bearing (8), and the ball screw (4) is rotatably connected with the lower disc (1) and the upper disc (2) through the ball bearing (8).

8. The coaxial expansion frock of hole of claim 1, characterized in that: and one end of the ball screw (4) penetrating through the upper disc (2) is connected with a rotating handle (9) through a coupler.

Technical Field

The invention relates to the technical field of coaxial positioning devices, in particular to an inner hole coaxial expansion tool.

Background

With the gradual development and the technical progress of large-scale lightweight automobile bodies and mechanical equipment, the coaxiality requirement of structures such as trusses in the large-scale lightweight automobile bodies during welding is more and more precise, however, the existing coaxiality positioning device is troublesome to operate during positioning and cannot be used for quickly positioning, and the welding efficiency of workpieces is greatly reduced. Based on the technical scheme, the invention designs the inner hole coaxial expansion tool to solve the problems.

Disclosure of Invention

The invention aims to provide a coaxial inner hole expanding tool to solve the technical problem.

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

the utility model provides a coaxial expansion frock of hole, includes parallel arrangement's lower disc and last disc, the equal angle rigid coupling has four groups connecting rods between disc and the last disc down, a side that the disc is close to the last disc rotates down and is connected with ball screw, and ball screw keeps away from down the disc one end run through the disc inner chamber, ball screw outer wall spiro union has slider assembly, angular sliding connection such as slider assembly outer wall has the support arm subassembly, support arm subassembly both ends respectively with lower disc and last disc sliding connection, and support arm subassembly is configured to withdraw or expand along with slider assembly's slip.

Furthermore, the support arm assemblies are provided with four groups, and the four groups of support arm assemblies and the four groups of connecting rods are arranged in a staggered mode.

Further, the slider subassembly includes the slider, and slider and ball screw looks spiro union, a plurality of groups's spouts have been seted up to angles such as slider lateral wall, the spout both ends are respectively towards lower disc and last disc, and the spout bottom is provided with the angle of slope, and the incline direction is by the sunken slope of last disc orientation, angle rigid couplings such as slider outer wall have a plurality of fixed blocks of group, the fixed block sets up with the spout one-to-one, and every fixed block of group is located every spout homonymy edge respectively, every group the one end rigid coupling that the slider was kept away from to the fixed block has the dog, and the dog is located the spout top, the dog bottom is provided with the angle of slope, dog inclination angle is unanimous with spout inclination angle size, and the incline direction of dog is opposite.

Further, support arm component includes the connecting plate, in connecting plate one side embedding spout and with slider sliding connection, and the connecting plate is located down between disc and the last disc and respectively with disc and last disc sliding connection down, the opposite side rigid coupling that connecting plate one side is relative has the support arm, and the support arm is located down the disc and goes up the disc outside, the bar groove of mutually supporting with the dog is seted up on the connecting plate surface, and bar groove both ends are respectively towards disc and last disc down.

Furthermore, the connecting plate is close to the equal rigid coupling of both sides wall of lower disc and last disc and has the stopper, disc and last disc all offer the spacing groove of mutually supporting with the stopper down.

Furthermore, a side wall of the connecting plate embedded in the sliding groove is provided with an inclination angle matched with the bottom of the sliding groove, and the strip-shaped groove is provided with an inclination angle matched with the stop block.

Furthermore, the center of one side face, close to each other, of the lower disc and the upper disc is provided with a ball bearing, and the ball screw is respectively connected with the lower disc and the upper disc in a rotating mode through the ball bearings.

Furthermore, one end of the ball screw penetrating through the upper disc is connected with a rotating handle through a coupler.

Compared with the prior art, the invention has the beneficial effects that:

according to the tool, the upper disc, the lower disc, the connecting rod, the ball screw, the sliding block assembly and the supporting arm assembly are arranged, so that the tool can be inserted into a workpiece and arranged at the junction of the two groups of workpieces when the two groups of workpieces are welded and installed, then the sliding block assembly is driven to slide up and down by rotating the ball screw, the supporting arm assembly is driven to contract and expand in a reciprocating mode, the junction of the inner wall of the workpiece is supported and positioned through the supporting arm assembly, and therefore the coaxiality of the two groups of workpieces is guaranteed.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic structural view of the present invention;

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

FIG. 3 is a schematic view showing a coupling structure of an upper disc and a lower disc according to the present invention;

FIG. 4 is a schematic structural view of a slider assembly of the present invention;

FIG. 5 is a cross-sectional view of the structure of the slider assembly of the present invention;

FIG. 6 is a schematic view of the support arm assembly of the present invention;

FIG. 7 is a front view of a support arm assembly of the present invention;

FIG. 8 is a schematic view of the connection structure of the slider assembly and the support arm assembly of the present invention;

fig. 9 is another schematic structure of the present invention.

In the drawings, the components represented by the respective reference numerals are listed below:

1. a lower disc; 2. an upper disc; 3. a connecting rod; 4. a ball screw; 5. a slider assembly; 51. a slider; 52. a chute; 53. a fixed block; 54. a stopper; 6. a support arm assembly; 61. a connecting plate; 62. a support arm; 63. a strip-shaped groove; 64. a limiting block; 7. a limiting groove; 8. a ball bearing; 9. the handle is rotated.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-9, the present invention provides a technical solution: the utility model provides a coaxial expansion frock of hole, lower disc 1 and last disc 2 including parallel arrangement, the equal angle rigid coupling has four group's connecting rods 3 between lower disc 1 and the last disc 2, a side that lower disc 1 is close to last disc 2 rotates and is connected with ball screw 4, and ball screw 4 keeps away from down disc 1's one end and runs through 2 inner chambers of last disc, 4 outer wall spiro unions of ball screw have sliding block assembly 5, angular sliding connection such as sliding block assembly 5 outer wall has support arm component 6, 6 both ends of support arm component respectively with disc 1 and last disc 2 sliding connection down, and support arm component 6 is configured to withdraw or expand along with sliding block assembly 5's slip.

Specifically, four sets of support arm assemblies 6 are provided, and the four sets of support arm assemblies 6 and the four sets of connecting rods 3 are arranged in a staggered manner.

Specifically, slider component 5 includes slider 51, and slider 51 and ball screw 4 looks spiro union, a plurality of groups spout 52 have been seted up to angles such as slider 51 lateral wall, spout 52 both ends are respectively towards lower disc 1 and last disc 2, and spout 52 bottom is provided with the angle of slope, and the incline direction is by the sunken slope of last disc 2 downward disc 1 direction, the angle rigid couplings such as slider 51 outer wall have a plurality of groups fixed block 53, fixed block 53 and spout 52 one-to-one set up, and every group fixed block 53 is located every group spout 52 homonymy edge respectively, the one end rigid coupling that slider 51 was kept away from to every group fixed block 53 has dog 54, and dog 54 is located spout 52 top, dog 54 bottom is provided with the angle of slope, dog 54 inclination is unanimous with spout 52 inclination angle size, and the incline direction of dog 54 is opposite with the incline direction of spout 52.

Specifically, support arm assembly 6 includes connecting plate 61, connecting plate 61 one side imbed in spout 52 and with slider 51 sliding connection, and connecting plate 61 is located down between disc 1 and the last disc 2 and respectively with disc 1 and last disc 2 sliding connection down, the opposite side rigid coupling that connecting plate 62 one side is relative has support arm 62, and support arm 62 is located disc 1 and the last disc 2 outside down, the strip groove 63 of mutually supporting with dog 54 is seted up on connecting plate 61 surface, and strip groove 63 both ends are respectively towards disc 1 and last disc 2 down.

Specifically, the connecting plate 61 is close to the two side walls of the lower disc 1 and the upper disc 2 and fixedly connected with the limiting blocks 64, and the limiting grooves 7 matched with the limiting blocks 64 are formed in the lower disc 1 and the upper disc 2.

Specifically, a side wall of the connecting plate 61 embedded in the sliding groove 52 is provided with an inclination angle matched with the bottom of the sliding groove 52, and the strip-shaped groove 63 is provided with an inclination angle matched with the stopper 54.

Specifically, the centers of the side faces of the lower disc 1 and the upper disc 2, which are close to each other, are provided with ball bearings 8, and the ball screw 4 is rotatably connected with the lower disc 1 and the upper disc 2 through the ball bearings 8.

Specifically, ball screw 4 runs through the one end of last disc 2 and has a rotation handle 9 through the coupling joint, makes this frock can carry out coaxial location to the pipeline of different length through the setting of rotating the handle to improve the application range of frock.

One specific application example of this embodiment is:

when the tool is assembled, one end of a ball screw 4 is inserted into a ball bearing 8 of a lower disc 1, then one ends of four groups of connecting rods 3 are fixedly connected with the lower disc 1 through bolts, then a sliding block 51 is sleeved on the outer wall of the ball screw 4, then a fixed block 53 is fixedly connected onto the sliding block 51 through bolts, then one side of a connecting plate 61 is embedded into a sliding groove 52 of the sliding block 51, a stop block 54 is abutted against the inside of a strip-shaped groove 63 to form a clamping structure, meanwhile, a limit block 64 on the connecting plate 61 is inserted into a limit groove 7 of the lower disc 1, and then a support arm 62 and the connecting plate 61 are fixedly installed through bolts, so that the installation of a support arm assembly 6 is completed; finally, the upper disc 2 and the four groups of connecting rods 3 are fixed through bolts, one end of the ball screw 4 penetrates through the ball bearing 8 of the upper disc 2, meanwhile, the other group of limiting blocks 64 on the connecting plate 61 are inserted into the limiting grooves 7 of the upper disc 2, and then the rotating handle 9 is connected with the ball screw 4 through a coupler as required to complete installation of the positioning tool;

in use, take the installation of two sets of pipes as an example:

inserting one end of a tool into two groups of pipelines to be positioned, enabling the supporting arm 62 to be positioned at the junction of the two groups of pipelines, then rotating the rotating handle 9, rotating the rotating handle 9 to drive the ball screw 4 to rotate, thereby driving the sliding block assembly 5 to slide along the ball screw 4 towards the lower disc 1, and setting a sunken inclined angle towards the lower disc 1 in the chute 52, thereby enabling the sliding block assembly 5 to push the connecting plate 61 and the supporting arm 62 to expand outwards in the sliding process, thereby enabling the supporting arm 62 to abut against the inner wall of the joint of the two groups of pipelines, thereby adjusting the coaxiality of the two groups of pipelines, and then welding; after the welding finishes, the handle 9 is rotated in the antiport, makes sliding block set 5 along ball screw 4 upwards the disc 2 direction slide, and because dog 54 joint is on the bar groove 63 of connecting plate 61 to make sliding block set 5 can drive support arm set 6 and withdraw, take out the frock after breaking away from the pipeline inner wall.

In the description of the present invention, it is to be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "other end", "upper", "one side", "top", "inner", "front", "center", "both ends", and the like, indicate orientations or positional relationships based on the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the referred device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.

In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "disposed," "connected," "secured," "screwed" and the like are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; the terms may be directly connected or indirectly connected through an intermediate, and may be communication between two elements or interaction relationship between two elements, unless otherwise specifically limited, and the specific meaning of the terms in the present invention will be understood by those skilled in the art according to specific situations.

Although embodiments of the present invention have been shown and described, it would be appreciated by those skilled in the art that changes may be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the claims and their equivalents.