Press fitting tool for automobile part production

Abstract

The utility model relates to a press-fitting tool for automobile part production, which comprises a frame, a pressure head and a press-fitting component arranged on the frame, the pressure head is arranged on the press-fitting component, the frame is also provided with a workbench, the workbench is provided with a clamping component, the clamping component is arranged below the pressure head, and the clamping component is arranged below the pressure head. A positioning assembly is arranged on the clamping assembly and comprises a driving part and a positioning part, the positioning part comprises a positioning pipe, a plurality of air bag rings are arranged on the outer wall of the positioning pipe, the positioning pipe is located under the pressing head, and the positioning assembly further comprises an air pump. The air pump is used for inflating or exhausting air into the air bag ring so as to change the outer diameter of the air bag ring, and the outer periphery of the air bag ring abuts against the inner wall of a bearing hole in the piston. By means of the press fitting tool for automobile part production, a bearing hole of a piston can be quickly aligned with the pressing head.

Description

Technical Field

[0001] The utility model relates to the field of press-fitting, in particular to a press-fitting tool for producing automobile parts. Background Art

[0002] Pressing is an assembly process, mainly used in the machinery manufacturing industry, especially in the process of assembling cylindrical interference fit dual parts. Pressing technology requires applying a thrust greater than the press-fitting force to the cylindrical interference fit dual parts to complete the assembly. In the production process of automobiles, a large number of automobile parts need to be produced or assembled using the press-fitting process, such as the assembly of automobile shock absorbers, the assembly of steering gear components, the assembly of gearbox components, and the press-fitting of piston pins. When assembling the piston and the connecting rod, the piston pin needs to be pressed into the bearing hole by a press machine to ensure that the connection between the piston and the connecting rod is firm and reliable, which plays a key role in the normal operation of the engine.

[0003] In the prior art, manual pinning machines, pneumatic pinning machines or hydraulic pinning machines are generally used. When these pinning machines are press-fitting the piston pin, the piston needs to be clamped and the pin hole needs to be located directly below the pressing head. On the one hand, this ensures that the pressing head can impact the piston pin during the press-fitting process, and on the other hand, it ensures that the pressing head can apply force evenly to the piston pin. However, when aligning the bearing hole and the pressing head, multiple calibrations are often required to align the two, which is inconvenient. In order to solve this problem, a press-fitting tool for automobile parts production is proposed. Utility Model Content

[0004] The purpose of the utility model is to provide a press-fitting tool for producing automobile parts to solve the problems raised in the above-mentioned background technology.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A press-fitting tool for producing automobile parts, comprising a frame, a press head and a press-fitting assembly arranged on the frame, wherein the press head is arranged on the press-fitting assembly;

[0007] The frame is also provided with a workbench, the workbench is provided with a clamping assembly, the clamping assembly is arranged below the pressure head, the clamping assembly is provided with a positioning assembly, the positioning assembly includes a driving member and a positioning member, the positioning member includes a positioning tube, a plurality of airbag rings are arranged on the outer wall of the positioning tube, the positioning tube is located directly below the pressure head, the positioning assembly also includes an air pump, the air pump is used to inflate or evacuate the airbag ring to change the outer diameter of the airbag ring, the outer periphery of the airbag ring abuts against the inner wall of the bearing hole on the piston, so as to position the piston and make its bearing hole directly below the pressure head;

[0008] The driving member is used to drive the positioning member to move up and down in the vertical direction, and is used to drive the positioning tube and the airbag ring to separate from the bearing hole of the piston.

[0009] Furthermore, the clamping assembly includes a clamping platform, a second drive source and a positive and negative threaded screw rod, and nut seats are provided on the positive and negative threaded parts of the positive and negative threaded screw rods, and a clamping block is provided on the nut seat. The second drive source is used to drive the nut seats of the positive and negative threaded parts of the positive and negative threaded screw rods to approach or move away from each other, and to drive the clamping blocks to approach or move away from each other to clamp or loosen the piston.

[0010] Furthermore, the positioning member also includes a fixing platform, and the positioning tube is arranged on the upper end surface of the fixing platform.

[0011] Furthermore, the positioning assembly also includes an air flow tube, the air inlet end of the air flow tube is connected to the air outlet end of the air pump, the air outlet end of the air flow tube is connected to a plurality of air branch pipes, and the air outlet ends of the plurality of air branch pipes are respectively connected to the air inlet ends of the plurality of air bag rings.

[0012] Furthermore, the driving member includes a driving source 1 and a lifting component, and the driving source 1 is used to drive the lifting component to lift the positioning member in a vertical direction.

[0013] Furthermore, the positioning assembly also includes a supporting plate, and the supporting plate is arranged above the positive and negative threaded rods.

[0014] Furthermore, the airbag ring includes a fixing ring and an airbag, the airbag is annular in shape, the inner periphery of the fixing ring is detachably connected to the outer wall of the positioning tube, the outer periphery of the fixing ring is recessed inward to form an annular groove, and the inner side portion of the annular airbag is detachably installed in the annular groove along the inner periphery of the annular groove.

[0015] Furthermore, an air inlet end is arranged on the inner periphery of the airbag, a through hole corresponding to the air inlet end of the airbag is opened on the side wall of the positioning tube, and the air outlet end of the air distribution pipe passes through the through hole to communicate with the air inlet end of the airbag.

[0016] Furthermore, the press-fitting tool also includes a controller, and the driving source one, the driving source two and the air pump are all controllably connected to the controller.

[0017] Compared with the prior art, the beneficial effects of the utility model are: through the setting of the positioning component, the bearing hole of the piston can be quickly aligned with the pressure head, and through the setting of the airbag ring, the pistons with bearing holes of different sizes can be aligned, and the clamping component can be used to quickly complete the clamping and positioning of the workpiece before pressing. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1This is a schematic diagram of the structure of the press-fitting tooling used in the production of automotive parts.

[0019] Figure 2 This is a schematic diagram of the structure of the positioning components of the press-fitting tooling used in the production of automotive parts.

[0020] Figure 3 A view showing the coordination of the clamping assembly and the positioning assembly of a press-fitting tool for producing automotive parts.

[0021] Figure 4 for Figure 3 Enlarged view of point A in the middle.

[0022] Figure 5 It is a top view of the clamping assembly and the positioning assembly.

[0023] Figure 6 Schematic diagram of the structure of the airbag ring.

[0024] In the figure: 1. frame; 2. press-fitting assembly; 3. press head; 4. workbench; 5. clamping assembly; 51. clamping table; 52. clamping block; 53. positive and negative screw rods; 54. driving source 2; 6. positioning assembly; 61. lifting assembly; 62. driving source 1; 63. fixed table; 64. positioning tube; 65. air flow tube; 66. air bag ring; 661. fixed ring; 662. air bag; 67. air distribution pipe; 68. support plate; 69. air pump; 7. controller. DETAILED DESCRIPTION

[0025] Various exemplary embodiments, features and aspects of the present application will be described in detail below with reference to the accompanying drawings. The same reference numerals in the accompanying drawings represent elements with the same or similar functions. Although various aspects of the embodiments are shown in the accompanying drawings, the drawings are not necessarily drawn to scale unless otherwise specified.

[0026] The word “exemplary” is used exclusively herein to mean “serving as an example, example, or illustration.” Any embodiment described herein as “exemplary” is not necessarily to be construed as preferred or advantageous over other embodiments.

[0027] In addition, in order to better illustrate the present application, numerous specific details are provided in the specific embodiments below. It should be understood by those skilled in the art that the present application can also be implemented without certain specific details. In some examples, methods, means, and elements well known to those skilled in the art are not described in detail in order to highlight the subject matter of the present application.

[0028] Example 1, please refer to Figure 1 to Figure 6 The structure shown in the embodiment of the utility model is a press-fitting tool for automobile parts production, comprising a frame 1, a pressing head 3 and a press-fitting assembly 2 arranged on the frame 1, and the pressing head 3 is arranged on the press-fitting assembly 2;

[0029] A workbench 4 is also provided on the frame 1, a clamping assembly 5 is provided on the workbench 4, the clamping assembly 5 is provided below the pressure head 3, a positioning assembly 6 is provided on the clamping assembly 5, the positioning assembly 6 includes a driving member and a positioning member, the positioning member includes a positioning tube 64, a plurality of airbag rings 66 are provided on the outer wall of the positioning tube 64, the positioning tube 64 is located directly below the pressure head 3, the positioning assembly 6 also includes an air pump 69, the air pump 69 is used to inflate or evacuate the airbag ring 66 to change the outer diameter of the airbag ring 66, the outer periphery of the airbag ring 66 abuts against the inner wall of the bearing hole on the piston, so as to position the piston and make its bearing hole directly below the pressure head 3;

[0030] The driving member is used to drive the positioning member to move up and down in the vertical direction, and to drive the positioning tube 64 and the airbag ring 66 to separate from the bearing hole of the piston.

[0031] In this embodiment, the driving force of the press-fitting assembly 2 comes from manually applied pressure. The frame 1, the press-fitting assembly 2 and the pressing head 3 are all existing technologies, and their structures and functions are no longer repeated. The press-fitting assembly 2 can also be a semi-automatic mechanical equipment whose driving force comes from a hydraulic component or a pneumatic component. The workbench 4 is horizontally arranged on the base of the frame 1, and the direction of the downward pressing path of the pressing head 3 is the vertical direction.

[0032] Furthermore, the clamping assembly 5 includes a clamping platform 51, a second driving source 54 and a positive and negative threaded screw rod 53. Nut seats are provided on the positive threaded part and the negative threaded part of the positive and negative threaded screw rod 53, and a clamping block 52 is provided on the nut seat. The second driving source 54 is used to drive the nut seats of the positive threaded part and the negative threaded part of the positive and negative threaded screw rod 53 to approach or move away from each other, and to drive the clamping block 52 to approach or move away from each other to clamp or loosen the piston.

[0033] In this embodiment, the interior of the clamping platform 51 is hollow, and a slide rail 1 is provided on the side wall of the clamping block 52. A movable groove is provided on the upper wall of the clamping platform 51, and the movable groove is connected to the internal space of the clamping platform 51. A slide groove 1 matching the slide rail 1 is provided on the groove wall of the movable groove. The slide rail 1 is slidably connected to the slide groove 1, and the slide rail 1 can slide along the slide groove 1. A self-locking device is also provided on the positive and negative threaded rods 53. The self-locking device can prevent the clamping block 52 from sliding when it is subjected to thrust, and can prevent the piston from falling off due to the movement of the clamping block 52 when the piston pin is pressed. There are two nut seats, which are respectively threadedly connected to the positive thread part and the negative thread part of the positive and negative threaded rods 53, and the number of clamping blocks 52 provided on each nut seat is one.

[0034] Furthermore, the positioning member further includes a fixing platform 63 , and the positioning tube 64 is disposed on the upper end surface of the fixing platform 63 .

[0035] In this embodiment, a second slide rail is further provided on the side wall of the fixed platform 63 along the vertical direction of the fixed platform 63, and a second slide groove matching the second slide rail is provided on the inner surfaces of the front wall and the rear wall of the clamping platform 51, and the second slide rail is slidably connected to the second slide groove, and the second slide rail can slide along the second slide groove, so that the lifting and lowering of the fixed platform 63 can be smoother.

[0036] Furthermore, the positioning assembly 6 also includes an air flow tube 65, the air inlet end of the air flow tube 65 is connected to the air outlet end of the air pump 69, the air outlet end of the air flow tube 65 is connected to a plurality of air branch tubes 67, and the air outlet ends of the plurality of air branch tubes 67 are respectively connected to the air inlet ends of a plurality of air bag rings 66.

[0037] In this embodiment, the number of air distribution pipes 67 is equal to the number of air bag rings 66. The air distribution pipes 67 evacuate or inflate the air bag rings 66 connected thereto. An inlet is provided on the side wall of the positioning pipe 64. The air outlet end of the air flow pipe 65 extends through the inlet into the interior of the positioning pipe 64. An air valve is also provided on the air flow pipe 65 to prevent the gas in the air bag ring 66 from leaking out.

[0038] Furthermore, the driving member includes a driving source 62 and a lifting assembly 61, and the driving source 62 is used to drive the lifting assembly 61 to lift the positioning member in a vertical direction.

[0039] In this embodiment, the lifting component 61 adopts an electric scissor lift. The output end of the driving source 62 is detachably connected to the driving component (screw) of the electric scissor lift through a key connection. The torque output by the driving source 62 will eventually cause the lifting platform of the electric scissor lift to move up and down in the vertical direction, thereby driving the fixed platform 63 to move up and down. The electric scissor lift is a prior art, and its structure and function are no longer repeated. Moreover, the lifting component 61 can also adopt other devices that can achieve linear movement, such as a screw lift or an electric telescopic rod.

[0040] Furthermore, the positioning assembly 6 also includes a supporting plate 68 , and the supporting plate 68 is arranged above the positive and negative threaded screws 53 .

[0041] In this embodiment, the front and rear ends of the support plate 68 are respectively installed on the inner surfaces of the front wall and the rear wall of the clamping platform 51 by screw connection or plug-in connection. The width of the support plate 68 can be designed with reference to the width of the smaller-sized piston in the conventional piston, that is, the width of the support plate 68 is smaller than the width of the smaller-sized piston in the conventional piston. It should be noted that the smaller-sized piston in the conventional piston can be selected according to the range of pistons pressed by the pressing tool, because, in actual conditions, considering that the support plate 68 is used to support the driving part and the positioning part, its size cannot be too small. The reason why the width of the support plate 68 needs to be limited is that if the width of the support plate 68 is reasonably designed, the two clamping blocks 52 that move close to each other can clamp pistons of more sizes.

[0042] Furthermore, the airbag ring 66 includes a fixing ring 661 and an airbag 662. The airbag 662 is annular in shape. The inner periphery of the fixing ring 661 can be detachably connected to the outer wall of the positioning tube 64. The outer periphery of the fixing ring 661 is recessed inward to form an annular groove. The inner side of the annular airbag 662 can be detachably installed in the annular groove along the inner periphery of the annular groove.

[0043] In this embodiment, except for the inner part of the airbag 662, the rest of the airbag 662 located inside the annular groove is also detachably connected to the annular groove, and its outer surface can be bonded to the inner wall of the annular groove by glue, which can ensure that the airbag 662 will not tilt when the piston contacts the airbag 662, causing the piston to tilt and misalign with the pressure head 3. There are at least two airbag rings 66, and more airbag rings 66 can be set according to the length of the positioning tube 64.

[0044] Furthermore, an air inlet end is provided on the inner periphery of the airbag 662 , a through hole corresponding to the air inlet end of the airbag 662 is opened on the side wall of the positioning tube 64 , and the air outlet end of the air distribution pipe 67 passes through the through hole and is connected to the air inlet end of the airbag 662 .

[0045] In this embodiment, a through hole is formed on the side wall of the fixing ring 661 , and the air inlet end of the air bag 662 is exposed out of sight through the through hole, so that it can be connected with the air outlet end of the air distribution pipe 67 .

[0046] Furthermore, the press-fitting tool also includes a controller 7 , and the driving source 1 62 , the driving source 2 54 and the air pump 69 are all control-connected to the controller 7 .

[0047] The specific method of positioning and clamping the piston of the utility model is as follows: before press-fitting, the airbag 662 is in a flattened state, the bearing hole of the piston is inserted from the top of the positioning tube 64 to the top of the airbag 662 at the uppermost end, and then the air pump 69 is used to inflate the airbag 662, and visually check whether the diameter of the outermost circle of the airbag 662 is close to the diameter of the bearing hole. When the two are close, the inflation is stopped, the air valve is closed, and the piston is continuously inserted downward. If the hole wall of the bearing hole does not contact with the airbag 662 or the contact is not tight, the air valve is opened, and the air is continuously inflated into the airbag until the hole wall of the bearing hole is in tight contact with the outer peripheral surface of the airbag 662 during the insertion process, the air supply is stopped, the air valve is closed, and the piston is continuously inserted downward until it is inserted to the bottom of the positioning tube 64. At this time, the bearing hole of the piston passes through The adjustment of the plurality of air bags 662 is in the vertical direction. Since the positioning tube 64 faces the pressure head 3, the bearing hole at this time also faces the pressure head 3. The driving source 2 54 is started (a motor can be selected as the driving source 2 54), and the two clamping blocks 52 are driven to approach each other until the two clamp the piston. Then, the air valve is opened, and the air pump 69 is started to extract the air inside the air bag 662 to make it in a flat state again. The air bag 662 no longer contacts the hole wall of the bearing hole. The driving source 1 62 is started (a motor can be selected as the driving source 1 62), and the lifting assembly 61 is driven to move the fixed platform 63 downward until the positioning tube 64 is disengaged from the bearing hole. The connecting rod and the piston pin are assembled, and then the piston pin is inserted into the bearing hole. Due to the interference fit between the two, the piston pin is pressed into the bearing hole through the pressure head 3.

[0048] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

[0049] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A press-fitting tool for automobile parts production, characterized in that: It comprises a frame, a pressing head and a pressing assembly arranged on the frame, wherein the pressing head is arranged on the pressing assembly; The frame is also provided with a workbench, the workbench is provided with a clamping assembly, the clamping assembly is arranged below the pressure head, the clamping assembly is provided with a positioning assembly, the positioning assembly includes a driving member and a positioning member, the positioning member includes a positioning tube, a plurality of airbag rings are arranged on the outer wall of the positioning tube, the positioning tube is located directly below the pressure head, the positioning assembly also includes an air pump, the air pump is used to inflate or evacuate the airbag ring to change the outer diameter of the airbag ring, the outer periphery of the airbag ring abuts against the inner wall of the bearing hole on the piston, so as to position the piston and make its bearing hole directly below the pressure head; The driving member is used to drive the positioning member to move up and down in the vertical direction, and is used to drive the positioning tube and the airbag ring to separate from the bearing hole of the piston.

2. A press-fitting tool for automobile parts production according to claim 1, characterized in that: The clamping assembly includes a clamping platform, a second drive source and a positive and negative threaded screw. Nut seats are provided on the positive and negative threaded parts of the positive and negative threaded screws, and clamping blocks are provided on the nut seats. The second drive source is used to drive the nut seats of the positive and negative threaded parts of the positive and negative threaded screws to move closer to or away from each other, and to drive the clamping blocks to move closer to or away from each other to clamp or loosen the piston.

3. A press-fitting tool for automobile parts production according to claim 2, characterized in that: The positioning member further comprises a fixing platform, and the positioning tube is arranged on the upper end surface of the fixing platform.

4. A press-fitting tool for automobile parts production according to claim 3, characterized in that: The positioning assembly also includes an air flow tube, the air inlet end of the air flow tube is connected to the air outlet end of the air pump, the air outlet end of the air flow tube is connected to a plurality of air branch pipes, and the air outlet ends of the plurality of air branch pipes are respectively connected to the air inlet ends of the plurality of air bag rings.

5. A press-fitting tool for automobile parts production according to claim 4, characterized in that: The driving member includes a driving source 1 and a lifting component, and the driving source 1 is used to drive the lifting component to lift the positioning member along a vertical direction.

6. A press-fitting tool for producing automobile parts according to claim 5, characterized in that: The positioning assembly also includes a supporting plate, and the supporting plate is arranged above the positive and negative threaded rods.

7. A press-fitting tool for automobile parts production according to claim 6, characterized in that: The airbag ring includes a fixing ring and an airbag. The airbag is annular in shape. The inner periphery of the fixing ring is detachably connected to the outer wall of the positioning tube. The outer periphery of the fixing ring is recessed inward to form an annular groove. The inner side of the annular airbag is detachably installed in the annular groove along the inner periphery of the annular groove.

8. A press-fitting tool for automobile parts production according to claim 7, characterized in that: The inner periphery of the airbag is provided with an air inlet end, the side wall of the positioning tube is provided with a through hole corresponding to the air inlet end of the airbag, and the air outlet end of the air distribution pipe passes through the through hole and is connected with the air inlet end of the airbag.

9. A press-fitting tool for automobile parts production according to claim 8, characterized in that: The press-fitting tool also includes a controller, and the driving source 1, the driving source 2 and the air pump are all controllably connected to the controller.

Images