阅读说明：本技术 一种磁流变减振器阻尼活塞及其生产工艺 (Damping piston of magnetorheological shock absorber and production process thereof ) 是由 陈敬华 杨茂举 皱晓峰 杨笑 毛志成 于 2021-10-08 设计创作，主要内容包括：本发明公开了一种磁流变减振器阻尼活塞,于所述下压紧垫片与所述阀芯之间设有垫圈,通过改变垫圈厚度可以调整磁场的宽度,从而改变磁场强度,其灵活性更强,更实用,适用范围更广,所述阀芯与所述垫圈通过套设于两者外侧壁上的密封层进行密封连接,通过密封层设置可以起到阀芯与垫圈之间的固定,同时起到密封的作用,防止磁流变液从阀芯与垫圈之间的缝隙间进入中心孔内,也可以隔断了磁流变液与励磁线圈的接触,省去了于励磁线圈外部套设密封部件的工序,其生产工艺包括有备料→阀芯加工→活塞杆加工→绕励磁线圈→组装,其中组装的过程中通过组装设备进行自动化组装,大大提高组装效率,降低生产成本且产量更高,更利于规模化生产。(The invention discloses a damping piston of a magneto-rheological damper, wherein a gasket is arranged between a lower pressing gasket and a valve core, the width of a magnetic field can be adjusted by changing the thickness of the gasket, so that the magnetic field intensity is changed, the flexibility is stronger, the piston is more practical and the application range is wider, the valve core and the gasket are in sealing connection through a sealing layer sleeved on the outer side walls of the valve core and the gasket, the valve core and the gasket can be fixed through the sealing layer, the sealing effect is realized, the magneto-rheological fluid is prevented from entering a central hole from a gap between the valve core and the gasket, the contact between the magneto-rheological fluid and an excitation coil can be also separated, the process of sleeving a sealing part outside the excitation coil is omitted, the production process comprises the steps of material preparation of the valve core → processing of a piston rod → winding of the excitation coil → assembling, and the automatic assembling is realized through assembling equipment in the assembling process, greatly improving the assembly efficiency, reducing the production cost, having higher yield and being more beneficial to large-scale production.)

1. The utility model provides a magneto rheological damper damping piston, its piston rod (2) including piston head (1) and being fixed in piston head (1) one end, the piston head is including piston cover (3), case (4), excitation coil (5), go up and compress tightly gasket (7) and compress tightly gasket (8) down, its characterized in that: a gasket (9) is arranged between the lower pressing gasket (8) and the valve core (4), and the valve core (4) is in sealing connection with the gasket (9) through a sealing layer (10) sleeved on the outer side walls of the lower pressing gasket and the valve core.

2. The damping piston of a magnetorheological shock absorber according to claim 1, wherein: the excitation coil (5) is connected with corresponding external power supply equipment through a lead (6), a center hole is formed in the center of the valve core (4), a through hole used for accommodating the lead (6) is formed in the center of the piston rod (2), and the lead (6) penetrates through the center hole and the through hole to extend out of the piston rod (2).

3. The damping piston of a magnetorheological shock absorber according to claim 1, wherein: the piston rod (2) is fixedly connected with the piston head (1) through threads, the center hole is a stepped hole, the aperture close to one end of the piston rod (2) is larger than the aperture far away from one end of the piston rod (2), the inner wall of the hole close to one end of the piston rod (2) is provided with an internal thread which is arranged axially, and one end, close to the piston head (1), of the piston rod (2) is provided with an external thread matched with the internal thread.

4. The damping piston of a magnetorheological shock absorber according to claim 1, wherein: the upper compression gasket (7) is sleeved on the piston rod (2) in a sealing manner, tightly clings to the upper end face of the valve core (4) and is fixed with the valve core (4) through screws, the lower compression gasket (8) is tightly clings to the lower end face of the gasket (9) and is fixed with the gasket (9) through screws, the valve core (4) is in clearance fit with the piston sleeve (3), the upper end face of the valve core (4), the lower end face of the gasket (9), a gap between the sealing layer (10) and the inner surface of the piston sleeve (3) form a flow channel of magnetorheological fluid, and the upper compression gasket (7) and the lower compression gasket (8) are provided with flow through holes (71) which are annularly distributed.

5. A production process of a damping piston of a magnetorheological shock absorber is characterized by comprising the following steps: the method comprises the following specific steps:

s1: preparing materials, namely preparing a valve core (4), a piston rod (2), a piston sleeve (3), a gasket (9), an upper compression gasket (7), a sealing layer (10) and a lower compression gasket (8);

s2: the valve core (4) is processed, a central hole is processed at the central position of the valve core (4), and an internal thread is processed in the central hole;

s3: a piston rod (2) is processed, and an external thread is processed at one end of the piston rod (2);

s4: a winding excitation coil (5), wherein the winding excitation coil (5) is wound on the valve core (4) processed in the step S2, and lead wires (6) are welded at two ends of the winding excitation coil (5) respectively;

s5: and assembling, namely installing the piston rod (2) processed in the step S3 on the valve core (4) wound with the magnet exciting coil (5) in the step S4 through assembling equipment, then installing a gasket (9) on the lower end face of the valve core (4), fixing the gasket through a sealing layer (10), plugging the gasket into the piston sleeve (3), installing an upper compression gasket (7) on the upper end face of the valve core (4) through a screw to fix the upper end face, and then fixing the lower end face of the gasket (9) through a screw.

6. The production process of the damping piston of the magnetorheological shock absorber as claimed in claim 5, wherein the production process comprises the following steps:

the assembling equipment comprises a rack, wherein an automatic feeding area, an assembling area, an automatic material shifting area and an automatic discharging area are fixed on the rack;

the assembly area comprises a circular turntable (a 3), a placing groove (a 31) which can position the valve core (4) and enable the lead wire (6) to hang down freely is arranged at the circumferential edge of the circular turntable (a 3), a first clamping mechanism which can clamp the outer circumferential wall of the valve core (4) to fix the valve core and drive the valve core (4) to rotate is arranged above the circular turntable (a 3), a second clamping mechanism which can clamp the freely drooping lead wire (6) in a certain space and can move from top to bottom along the axial direction of the valve core (4) until the lower end part of the lead wire (6) is clamped is arranged below the circular turntable (a 3), a third clamping mechanism capable of clamping the piston rod (2) and pushing the piston rod (2) to move from bottom to top so that the lead (6) penetrates through a through hole of the piston rod (2) and tightly pushes an end face of the valve core (4) provided with an internal thread and continuously moves upwards is arranged below the second clamping mechanism;

the automatic material stirring area comprises a lifting rotary cylinder (a 4) and a stirring device fixed on the movable end of the lifting rotary cylinder (a 4), and the stirring device comprises a feeding stirring rod (a 41) and a discharging stirring rod (a 42).

7. The production process of the damping piston of the magnetorheological shock absorber as claimed in claim 6, wherein the production process comprises the following steps: the first clamping mechanism comprises a clamping device and a first driving device for driving the clamping device to move up and down, and the clamping device comprises a pneumatic clamping jaw (a 5) and a first rotary driving device for driving the pneumatic clamping jaw (a 5) to rotate.

8. The production process of the damping piston of the magnetorheological shock absorber as claimed in claim 6, wherein the production process comprises the following steps: the second clamping mechanism comprises an electromagnetic chuck (a 6) and an adsorption base (a 61) which can be adsorbed by the electromagnetic chuck (a 6), a second clamping device is fixed on the adsorption base (a 61), and the second clamping device comprises an arc-shaped second clamping piece (a 63) which hoops the lead (6) from the radial direction of the lead (6) and a second driving mechanism (a 62) which drives the second clamping piece (a 63) to move in a radial direction.

9. The production process of the damping piston of the magnetorheological shock absorber as claimed in claim 6, wherein the production process comprises the following steps: the third clamping mechanism comprises a third pneumatic clamping jaw (a 7) and a third driving mechanism (a 71) for driving the third pneumatic clamping jaw (a 7) to move along the axial direction of the valve core (4).

10. The production process of the damping piston of the magnetorheological shock absorber as claimed in claim 6, wherein the production process comprises the following steps:

the automatic feeding area comprises two parallel feeding conveyer belts (a 1) which are arranged at intervals, and a feeding conveyer channel which is convenient for the free hanging of the leads (6) is formed between the two feeding conveyer belts (a 1);

the automatic discharging area comprises two parallel discharging conveying belts (a 2) arranged at intervals, and a discharging conveying channel convenient for the free vertical placement of the lead (6) is formed between the two discharging conveying belts (a 2).

Technical Field

The invention relates to the technical field of damping systems, in particular to a damping piston of a magneto-rheological shock absorber and a production process thereof.

Background

Vibration is a common physical phenomenon, and along with the continuous progress of human society and the continuous development of scientific technology, the vibration problem in the fields of traffic, national defense, machining, building structures, automobiles and the like is increasingly concerned. For example, a vehicle can generate a series of jolts and vibrations in the driving process, so that the riding comfort is reduced, in order to overcome the vibrations and improve the riding comfort, a magnetorheological damper is generally arranged on a vehicle suspension, so that the vibration damping effect is achieved, along with the pursuit of people on the living quality, the comfort of a seat system is one of important indexes for evaluating the performance of the vehicle, so that the damping of the magnetorheological damper is also applied to a vehicle seat suspension system, the application range of the magnetorheological damper is wider and wider, and the market demand is larger and larger.

The magnetic current changing damper is a device for providing motion resistance and reducing motion energy, and mainly applies a certain current to an exciting coil in a winding slot of a damping piston to generate a magnetic field so as to change the yield strength of the magnetic current changing liquid flowing through a liquid flow channel, thereby dynamically changing the output damping force. The magnetorheological damper has the outstanding advantages of simple structure, small volume, low energy consumption, wide dynamic range, high response speed and continuously adjustable damping, the damping piston is one of important parts, the production of the damping piston in the current market is manually assembled, the production efficiency is low, and the production cost is high, so that the magnetorheological damper damping piston and the production process thereof are urgently needed.

Disclosure of Invention

In order to solve the problems, the invention provides a damping piston of a magneto-rheological shock absorber and a production process thereof.

A damping piston of a magneto-rheological shock absorber comprises a piston head and a piston rod fixed at one end of the piston head, wherein the piston head comprises a piston sleeve, a valve core, a magnet exciting coil, an upper pressing gasket and a lower pressing gasket, a gasket is arranged between the lower pressing gasket and the valve core, and the valve core and the gasket are in sealing connection through a sealing layer sleeved on the outer side walls of the valve core and the gasket.

Preferably, the excitation coil is connected with corresponding external power supply equipment through a lead wire, a central hole is formed in the center of the valve core, a through hole for accommodating the lead wire is formed in the center of the piston rod, and the lead wire penetrates through the central hole and the through hole and extends out of the piston rod.

Preferably, the piston rod is fixedly connected with the piston head through threads, the central hole is a stepped hole, the diameter of the central hole close to one end of the piston rod is larger than that of the central hole far away from one end of the piston rod, an inner thread which is axially arranged is formed in the inner wall of the central hole close to one end of the piston rod, and an outer thread matched with the inner thread is arranged at one end of the piston rod close to the piston head.

Preferably, the upper compression gasket is sleeved on the piston rod in a sealing manner, tightly clings to the upper end face of the valve core and is fixed with the valve core through a screw, the lower compression gasket is tightly clings to the lower end face of the gasket and is fixed with the gasket through a screw, the valve core is in clearance fit with the piston sleeve, a flow channel of magnetorheological fluid is formed by the upper end face of the valve core, the lower end face of the gasket and a clearance between the sealing layer and the inner surface of the piston sleeve, and the upper compression gasket and the lower compression gasket are provided with flow through holes which are distributed annularly.

A production process of a damping piston of a magnetorheological shock absorber comprises the following specific steps:

s1: preparing materials, namely preparing a valve core, a piston rod, a piston sleeve, a gasket, a sealing layer, an upper compression gasket and a lower compression gasket;

s2: processing a valve core, wherein a central hole is processed at the central position of the valve core, and an internal thread is processed in the central hole;

s3: processing a piston rod, wherein an external thread is processed at one end of the piston rod;

s4: a winding excitation coil wound on the valve core processed in step S2, and lead wires are welded to both ends of the winding excitation coil;

s5: and assembling, namely installing the piston rod processed in the step S3 on the valve core wound with the magnet exciting coil in the step S4 through assembling equipment, then arranging a gasket on the lower end face of the valve core, fixing the gasket through a sealing layer, plugging the gasket into the piston sleeve, installing an upper compression gasket on the upper end face of the valve core through a screw to fix the upper end face of the valve core, and fixing the lower end face of the gasket through the screw.

Preferably, the assembling equipment comprises a rack, and an automatic feeding area, an assembling area, an automatic material shifting area and an automatic material discharging area are fixed on the rack;

the assembly area comprises a circular turntable, a placing groove capable of positioning the valve core and enabling the lead to hang freely is formed in the circular turntable, a first clamping mechanism capable of clamping the outer circumferential wall of the valve core to fix the valve core and drive the valve core to rotate is arranged above the circular turntable, a second clamping mechanism capable of hooping the freely hanging lead in a certain space and moving from top to bottom along the axis direction of the valve core until the lower end part of the lead is hooped is arranged below the circular turntable, and a third clamping mechanism capable of clamping the piston rod and pushing the piston rod to move from bottom to top so that the lead penetrates through a through hole of the piston rod and pushes the end face of the valve core with the internal thread to move upwards is arranged below the second clamping mechanism;

the automatic material shifting area comprises a lifting rotary cylinder and a shifting device fixed on the movable end of the lifting rotary cylinder, and the shifting device comprises a feeding shifting rod and a discharging shifting rod.

Preferably, the first clamping mechanism comprises a clamping device and a first driving device for driving the clamping device to move up and down, and the clamping device comprises a pneumatic clamping jaw and a first rotary driving device for driving the pneumatic clamping jaw to rotate.

Preferably, the second clamping mechanism includes an electromagnetic chuck and an adsorption base which can be adsorbed by the electromagnetic chuck, the adsorption base is fixed with a second clamping device, and the second clamping device includes an arc-shaped second clamping piece which hoops the lead from the radial direction of the lead and a second driving mechanism which drives the second clamping piece to move in the radial direction.

Preferably, the third clamping mechanism includes a third pneumatic jaw and a third driving mechanism for driving the third pneumatic jaw to move along the axial direction of the valve core.

Preferably, the automatic feeding area comprises two parallel feeding conveyer belts which are arranged at intervals, and a feeding conveyer channel which is convenient for the free vertical placement of the lead is formed between the two feeding conveyer belts;

the automatic discharging area comprises two parallel discharging conveyer belts arranged at intervals, and a discharging conveying channel convenient for freely hanging and placing the lead is formed between the two discharging conveyer belts.

The invention has the beneficial effects that:

(1) the invention discloses a damping piston of a magneto-rheological shock absorber, wherein a gasket is arranged between a lower pressing gasket and a valve core, the magnetic field intensity can be adjusted by changing the thickness of the gasket, the damping piston has stronger flexibility, stronger practicability and wider application range, the valve core and the gasket are in sealing connection through a sealing layer sleeved on the outer side walls of the valve core and the gasket, the valve core and the gasket can be fixed through the sealing layer, and meanwhile, the sealing effect is achieved, the magneto-rheological fluid is prevented from entering a central hole from a gap between the valve core and the gasket, the contact between the magneto-rheological fluid and an excitation coil can be cut off, and the process of sleeving a sealing part outside the excitation coil is omitted.

(2) The invention discloses a damping piston of a magnetorheological damper, which comprises a piston head and a piston rod fixed at one end of the piston head, wherein the piston head comprises a piston sleeve, a valve core, an excitation coil, an upper compression gasket, a gasket and a lower compression gasket.

(3) The invention discloses a production process of a damping piston of a magneto-rheological shock absorber, which comprises the steps of material preparation → valve core processing → piston rod processing → magnet exciting coil winding → assembly, the whole process flow is simple, the yield is high, meanwhile, the traditional assembly process is manually assembled, the process of automatically penetrating the piston rod is difficult for assembly because of the flexibility and the random extension or bending of a lead, no automatic equipment is used for penetrating the lead and assembling the piston rod on the valve core, and manual assembly is needed, so that the labor cost is high, the production efficiency is low.

(4) The invention discloses a production process of a damping piston of a magneto-rheological damper, which comprises assembly equipment, wherein the assembly equipment comprises a rack, an automatic feeding area, an assembly area, an automatic material stirring area and an automatic discharging area are fixed on the rack, two working procedures of feeding and discharging can be synchronously realized by matching the automatic feeding area with the automatic discharging area, the automation degree is high, the production efficiency is high, meanwhile, a circular turntable of the assembly area, a first clamping mechanism, a second clamping mechanism and a third clamping mechanism are arranged, the part of a valve core, which is positioned above the circular turntable, is clamped and fixed by the first clamping mechanism, a freely drooping lead wire is hooped in the second clamping piece by the second clamping mechanism, an adsorption base can move along a slide rail from top to bottom along the axis direction of the valve core to straighten the lead wire and hoop the lower end part of the lead wire, and the third clamping mechanism can clamp and fix a piston rod, and can support the absorption base card on the third fixture and carry out synchronous movement at the in-process that moves up along the axle center direction of case, and the in-process lead wire that moves gets into the piston rod gradually, until the upper end of piston rod supports tightly in the lower terminal surface of case, and first fixture drives the case rotation this moment, the piston rod continues to shift up under the promotion of third fixture, thereby realized both threaded mounting, solved traditional equipment process because the flexibility of lead wire and arbitrary extension or bending nature, make its process of passing the piston rod automatically be the difficult point of equipment, can't realize the automation and pass the lead wire piston rod and assemble the piston rod on the case, thereby must adopt manual assembly, make labour cost high, technical problem that production efficiency is low.

Drawings

FIG. 1 is a schematic view of a damping piston structure of a magnetorheological shock absorber of the present invention;

FIG. 2 is a schematic view of the piston head construction of the present invention;

FIG. 3 is a schematic view of the upper pressure pad of the present invention;

FIG. 4 is a schematic structural view of an assembling apparatus of the present invention;

FIG. 5 is a schematic view of another perspective structure of the assembling apparatus of the present invention;

FIG. 6 is a schematic structural view of the first clamping mechanism of the present invention clamping and fixing the valve element;

FIG. 7 is a schematic structural view illustrating the second clamping mechanism of the present invention clamping and fixing the lower end of the lead;

FIG. 8 is a schematic structural view of the third clamping mechanism of the present invention moving upward and abutting against the lower end surface of the valve core;

FIG. 9 is an enlarged view of a second clamping mechanism of the present invention;

FIG. 10 is a schematic diagram of the automatic material shifting section before material shifting according to the present invention;

FIG. 11 is a schematic diagram of the automatic material shifting section after material shifting according to the present invention;

fig. 12 is a schematic structural view of a circular turntable according to the present invention.

In the figure: the device comprises a piston head 1, a piston rod 2, a piston sleeve 3, a valve core 4, an excitation coil 5, a lead 6, an annular sleeve 32, an upper pressing gasket 7, a flow through hole 71, a gasket 9, a lower pressing gasket 8, a feeding conveying belt a1, a discharging conveying belt a2, a circular turntable a3, a placing groove a31, a lifting rotating cylinder a4, a feeding shift lever a41, a discharging shift lever a42, an adsorption base a61, a second clamping piece a63, a sliding rail a8, a pneumatic clamping jaw a5, an electromagnetic suction cup a6, a second driving mechanism a62, a third pneumatic clamping jaw a7 and a third driving mechanism 63a 71.

Detailed Description

The present invention will now be described more fully hereinafter with reference to the accompanying drawings, in which some, but not all embodiments of the invention are shown. 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.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

As shown in fig. 1 to 12, a damping piston of a magnetorheological damper comprises a piston head 1 and a piston rod 2 coaxially fixed at one end of the piston head 1, wherein the piston head 1 comprises a piston sleeve 3 and a cylindrical valve core 4 arranged in the piston sleeve 3, an annular wire groove is formed in one end of the outer side wall of the valve core 4, which is far away from the piston rod 2, an excitation coil 5 is wound in the annular wire groove, lead wires 6 are respectively welded at two ends of the excitation coil 5 and are connected with external corresponding power supply equipment (not shown in the figure) through the lead wires 6, the valve core 4 is fixed in the piston sleeve 3 through an upper compression gasket 7 and a lower compression gasket 8, a gasket 9 is arranged between the valve core 4 and the lower compression gasket 8, the valve core 4 and the gasket 9 form an i-shaped structure, a sealing layer 10 is sleeved at a concave part formed in the middle of the valve core 4 and the gasket 9, and the sealing layer 10 is used for fixing the valve core 4 and the gasket 9, meanwhile, the sealing layer 10 can also prevent magnetorheological fluid from entering a central hole from a gap between the valve core 4 and the gasket 9, a sealing part sleeved outside the magnet exciting coil 5 for protecting the magnet exciting coil 5 is omitted, the sealing layer 10 can be made of rubber or silica gel, the thickness of the gasket 9 is B, the wound length of the magnet exciting coil 5 on the valve core 4 is A, in the actual production process, the thickness of the gasket 9 can be adjusted according to the requirement of the required magnetic field intensity, namely, if the magnetic field intensity is required to be reduced, the size of the wound length A of the magnet exciting coil 5 is reduced, the gasket 9 with the thicker thickness B is correspondingly selected, if the magnetic field intensity is required to be enhanced, the length A of the wound magnet exciting coil 5 is increased, the gasket 9 with the thinner thickness B is correspondingly selected, and the width of the magnetic field can be adjusted by changing the thickness adjustment of the gasket 9 so as to adjust the magnetic field intensity, the flexibility is stronger, the practicality is stronger, and application scope is wider.

The center of the valve core 4 is provided with a center hole, the center of the piston rod 2 is provided with a through hole for accommodating the lead 6, the lead 6 penetrates through the center hole and extends to the outside of the piston rod 2, the outer side wall of the piston sleeve 3 is provided with a mounting groove, the mounting groove is internally sleeved with the annular sleeve 32, the structure is simple, the connecting structure is simple and convenient, the assembly is simple in the production process, the production efficiency is improved, and the large-scale production is facilitated.

Specifically, the piston rod 2 with the piston head 1 is fixed through threaded connection, the centre bore is the shoulder hole, and its aperture that is close to 2 one end of piston rod is greater than and keeps away from the aperture of 2 one end of piston rod, and it is close to set up the internal thread of axial arrangement on the inner wall of the hole of 2 one ends of piston rod, the piston rod 2 is close to one of piston head 1 is served and is arranged with internal thread matched with screw thread, does benefit to the equipment in its production process through threaded connection is fixed.

Specifically, the upper pressing gasket 7 is hermetically sleeved on the piston rod 2 and tightly attached to the upper end face of the valve core 4 and fixed with the valve core 4 through a screw, a gasket 9 is arranged on the lower end face of the valve core 4, the lower pressing gasket 8 is tightly attached to the lower end face of the gasket 9 and fixed with the gasket 9 through a screw, the valve core 4 and the gasket 9 are respectively in clearance fit with the piston sleeve 3, gaps between the upper end face and the lower end face and between the side cylindrical surfaces of the valve core 4 and the inner surface of the piston sleeve 3 form a flow channel of magnetorheological fluid, the upper pressing gasket 7 and the lower pressing gasket 8 are both provided with annularly distributed flow through holes 71, the magnetic field intensity can be adjusted through adjusting the thickness of the gasket 9, after the damping piston of the magnetorheological damper of the invention is assembled in the magnetorheological damper, when the damping piston of the magnetorheological damper moves towards the direction of the lower pressing gasket 8 in the magnetorheological damper, magnetorheological fluid enters the piston sleeve 3 from the flow through holes 71 which are distributed annularly on the lower compression gasket 8, flows radially along a gap between the plane of one end of the valve core 4 and the lower compression gasket 8, then enters an annular channel between the piston sleeve 3 and the side cylindrical surface of the valve core 4, passes through a gap between the upper compression gasket 7 and the plane of the other end of the valve core 4, and finally flows out from the flow through holes 71 on the upper compression gasket 7.

A production process of a damping piston of a magnetorheological shock absorber comprises the following specific steps:

s1: preparing materials, namely preparing a valve core 4, a piston rod 2, a piston sleeve 3, a gasket 9, an upper compression gasket 7 and a lower compression gasket 8;

s2: a valve core 4 is processed, a central hole is processed at the central position of the valve core 4, and an internal thread is processed in the central hole;

s3: processing a piston rod 2, wherein an external thread is processed at one end of the piston rod 2;

s4: a winding excitation coil 5, wherein the winding excitation coil 5 is wound on the valve core 4 processed in the step S2, and lead wires 6 are welded to both ends of the winding excitation coil 5;

s5: assembling, namely installing the piston rod 2 processed in the step S3 on the valve core 4 wound with the magnet exciting coil 5 in the step S4 through assembling equipment, plugging the valve core 4 provided with the piston rod 2 in the piston sleeve 3, installing an upper compression gasket 7 on the upper end surface of the valve core 4 through a screw to fix the upper end surface, sequentially installing a gasket 9 and a lower compression gasket 8 on the lower end surface of the valve core 4 and fixing the lower end surface through the screw, so that the manufacturing of the damping piston of the magneto-rheological shock absorber is finished, the whole process flow is simple, the yield is high, meanwhile, the traditional assembling process is manually assembled, the process of penetrating the piston rod is difficult to assemble because of the flexibility and the random extension or bending of the lead, no automatic equipment can realize the lead penetration and the piston rod is assembled on the valve core, and therefore the manual assembling is needed, the assembly equipment solves the existing difficulty, can realize that the lead wire passes through the piston rod and assembles the piston rod on the valve core, realizes automatic assembly, greatly improves the assembly efficiency, reduces the production cost, has higher yield and is more beneficial to large-scale production.

The assembling equipment comprises a rack, wherein an automatic feeding area, an assembling area, an automatic material shifting area and an automatic material discharging area are fixed on the rack;

the automatic feeding area comprises two parallel feeding conveyer belts a1 arranged at intervals, a feeding conveyer channel convenient for leading wires 6 to freely hang is formed between the two feeding conveyer belts a1, the two feeding conveyer belts a1 support the valve core 4, the leading wires 6 of the valve core 4 freely hang in the feeding conveyer channel and move to the assembly area through the conveying of the feeding conveyer belts a1, the valve core is arranged on the feeding conveyer belts a1 at intervals, and position sensors are arranged on the feeding conveyer belts a1 close to the rotary turntable;

the assembly area comprises a circular turntable a3, the circumferential edge of the circular turntable a3 is provided with three or more than three placement grooves a31 which can position the valve core 4 and enable the lead wire 6 to freely hang, the placement grooves a31 on the circular turntable a3 are three or more, the notch of one placement groove a31 is aligned with the feeding conveying channel between the feeding conveying belts a1, the height of the circular turntable a3 is equal to or slightly lower than the height of the feeding conveying belts a1, so that the valve core 4 can enter the placement groove a31, the next placement groove a31 along the rotation direction of the circular turntable a3 is used for discharging, the notch of the next placement groove a31 is aligned with the discharging conveying channel between two discharging conveying belts a2, the rest placement grooves a31 are used for waiting for feeding, the angle of each rotation of the circular turntable a3 is consistent, and the notch of one placement groove a31 is aligned with the feeding conveying channel after each rotation, the notch of the next placing groove a31 in the rotating direction is aligned with the discharging conveying channel, so that discharging action can be synchronously performed while feeding, and the working efficiency is improved;

a first clamping mechanism capable of clamping the outer circumferential wall of the valve core 4 to fix the valve core and driving the valve core 4 to rotate is arranged above the circular turntable a 3;

a second clamping mechanism which can clamp the freely drooping lead 6 in a certain narrow space which is smaller than the diameter of the through hole of the piston rod 2 and can move from top to bottom along the axis direction of the valve core 4 to straighten the lead 6 and clamp the lower end part of the lead 6 is arranged below the circular turntable a 3;

a third clamping mechanism capable of clamping the piston rod 2 and pushing the piston rod 2 to move from bottom to top so that the lead 6 penetrates through a through hole of the piston rod 2 and tightly pushes an end face of the valve core 4 with internal threads and continues to move upwards is arranged below the second clamping mechanism, and the axial lead of the piston rod 2 is coaxial with the axial lead of the valve core 4;

the automatic material stirring area comprises a lifting rotary cylinder a4 and a stirring device fixed on the movable end of a lifting rotary cylinder a4, the stirring device comprises a feeding stirring rod a41 and a discharging stirring rod a42, when feeding is needed, the lifting rotary cylinder a4 rises and rotates by a corresponding angle, at the moment, the feeding stirring rod a41 rotates to the position above a feeding conveyer belt a1 and at the interval between a valve core 4 and a valve core 4 closest to a circular turntable a3, as shown in figure 10, meanwhile, the discharging stirring rod a42 is positioned above the edge of the valve core 4 close to the automatic discharging area, then the lifting rotary cylinder a4 descends and rotates reversely, the feeding stirring rod a41 stirs the valve core 4 into a31, the discharging stirring rod a42 stirs the assembled valve core 4 onto a discharging conveyer belt a2, at the moment, as shown in figure 11, feeding and discharging can be synchronously realized through the arrangement of the automatic material stirring area, the production efficiency is greatly improved, and the automation degree is high;

the automatic discharging area comprises two parallel discharging conveyer belts a2 arranged at intervals, a discharging conveyer channel convenient for the lead 6 to freely hang is formed between the two discharging conveyer belts a2, and the valve core 4 is conveyed to the next process through the movement of the discharging conveyer belts a 2.

Specifically, the opening size of the placement groove a31 is larger than the diameter of the piston rod 2, thereby facilitating the assembly of the piston rod 2 on the valve core 4 through the placement groove a 31.

Specifically, the first clamping mechanism includes a clamping device and a first driving device for driving the clamping device to move up and down, the clamping device includes a pneumatic clamping jaw a5 and a first rotation driving device for driving the pneumatic clamping jaw a5 to rotate, and the pneumatic clamping jaw a5 is a conventional device in the art, and therefore, the description is omitted.

Specifically, the second clamping mechanism includes an electromagnetic chuck a6 and an adsorption base a61 that can be adsorbed by the electromagnetic chuck a6, whether the adsorption base a61 is fixed can be realized by controlling the power on and off of the electromagnetic chuck a6, the electromagnetic chuck a6 is fixed on the rack and is a conventional device in the art, so that details are not repeated, two sides of the adsorption base a61 are slidably connected in a sliding rail a8, the sliding rail a8 is fixed on the rack, and the arrangement of the sliding rail a8 can ensure that when the electromagnetic chuck a6 is powered off, the adsorption base a61 slides down from top to bottom due to the action of gravity, a second clamping device is fixed on the adsorption base a61 within a limited track range, the second clamping device includes an arc-shaped second clamping piece a63 that radially clamps the lead 6 from the radial direction of the lead 6 and a drive mechanism a62 that drives the second clamping piece a63 to radially move, the second driving mechanism a62 can be a telescopic electric pole or a telescopic cylinder, the two second clamping pieces a63 move oppositely and can restrain the lead 6 under the driving of the second driving mechanism a62, when the electromagnetic chuck a6 is powered off, the adsorption base a61 falls down along the sliding rail a8 from top to bottom, the lead 6 can be restrained from top to bottom, the lowest end of the adsorption base a61 can be restrained in the second clamping piece a63 and cannot be bent outwards or stretched randomly, and the operation of the subsequent process of penetrating the lead 6 into the piston rod 2 is facilitated.

Specifically, the third clamping mechanism includes a third pneumatic clamping jaw a7 and a third driving mechanism a71 for driving the third pneumatic clamping jaw a7 to move axially along the valve core 4 in a third slide rail, where the third pneumatic clamping jaw a7 is a pneumatic clamping jaw in the field, and is a conventional device, and therefore, description is omitted, and the third driving mechanism a71 may be a telescopic cylinder.

Specifically, the axis of the clamping space formed by the two second clamping pieces a63 in the clamping state is at the same position as the axis of the piston rod 2 and the axis of the valve core 4, and the diameter of the clamping space formed by the two second clamping pieces a63 is smaller than the diameter of the through hole of the piston rod 2, so as to facilitate the lead wire 6 to penetrate into the piston rod 2.

The specific operation process comprises the following steps:

the first step is as follows: the valve cores 4 are conveyed on a feeding conveyer belt a1 at intervals;

the second step is that: when the position sensor senses the valve core 4, the feeding conveyer belt a1 stops conveying, the lifting rotary cylinder a4 rises and rotates by a corresponding angle, the feeding deflector rod a41 is positioned above the feeding conveyer belt a1 and at the interval between the valve core 4 and the valve core 4, as shown in fig. 10, meanwhile, the discharging deflector rod a42 is positioned above the edge of the valve core 4 close to the automatic discharging area, the lifting rotary cylinder a4 descends and then rotates reversely, the feeding deflector rod a41 deflects the valve core 4 into the placing groove a31, the discharging deflector rod a42 deflects the assembled valve core 4 onto the discharging conveyer belt a2, and the state is shown in fig. 11;

the third step: the first driving device drives the clamping device to move towards the valve core, the pneumatic clamping jaw a5 clamps and fixes the valve core, and the third clamping mechanism clamps and fixes the piston rod 2;

the fourth step: the two second clamping pieces a63 are moved towards each other and can bind the lead 6 by the driving of the second driving mechanism a62, as shown in fig. 6;

the fifth step: when the electromagnetic chuck a6 is powered off, the suction base a61 falls down along the slide rail a8 from top to bottom, and can bind the lead 6 from top to bottom, and the lowest end part of the suction base a61 can also be bound in the second clamping piece a63 without bending outwards or extending at will, and at this time, the suction base a61 cannot fall down continuously because the suction base a61 is clamped by the piston rod 2, as shown in fig. 7;

and a sixth step: the third driving mechanism a71 works, in the process that the piston rod 2 and the adsorption base a61 clamped on the piston rod 2 are pushed towards the valve core 4, the lead wire 6 gradually enters the piston rod 2, when the adsorption base a61 is lifted to the electromagnetic chuck a6, the third driving mechanism a71 stops working, at this time, the electromagnetic chuck a6 is electrified to adsorb and fix the adsorption base a61, the second driving mechanism a62 drives the two second clamping pieces a63 to move in the opposite direction, after the constraint on the lead wire 6 is removed, the third driving mechanism a71 continues working, the piston rod 2 is abutted against the lower end face of the valve core 4, as shown in fig. 8, and at this time, the first clamping mechanism drives the valve core 4 to rotate, and the piston rod 2 continues to move upwards along with the rotation of the valve core 4 to fix the piston rod 2 and the valve core 4 by threads;

the seventh step: after the assembly is finished, the first clamping mechanism moves upwards, the third clamping mechanism moves downwards and returns to the initial position, and preparation is made for the assembly of the next valve core 4 and the piston rod 2;

eighth step: the circular turntable a3 rotates by a corresponding angle, and the notch of the placing groove a31, which is clamped with the valve core after being assembled, rotates to be aligned with the discharging conveying channel; the notch of the placement groove a31 in the waiting state is rotated to be aligned with the feeding conveyance path.

The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes may be made to the present invention by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.