Press fitting device for eccentric shaft assembly

Abstract

This invention provides a press-fitting device for an eccentric shaft assembly, including a press-fitting mechanism, a switching mechanism, a positioning mechanism, a first support mechanism, and a second support mechanism. The press-fitting mechanism is used to press workpiece 1 and workpiece 2 onto workpiece 3, and includes a press-fitting seat, a first press head, and a second press head that can move along the press-fitting direction. The first press head is used to position and press workpiece 1, and the second press head is used to position and press workpiece 2. The switching mechanism is disposed on the press-fitting seat and is used to drive the first and second press heads to move to the corresponding press-fitting positions. The positioning mechanism is used to position workpiece 3. The first support mechanism positions and supports the swinging part on workpiece 3 to limit the swinging of the swinging part when pressing workpiece 1. The second support mechanism is disposed on the first support mechanism and is used to position and support workpiece 1 after press-fitting when pressing workpiece 2. This invention integrates the press-fitting of the eccentric shaft assembly into one unit and uses a single press-fitting mechanism, saving space and cost, reducing the number of positioning operations, and improving assembly efficiency and quality.

Description

Technical Field

[0001] This invention relates to the field of advanced manufacturing and automation technology, and in particular to a press-fitting device for an eccentric shaft assembly. Background Technology

[0002] Car air pumps were initially used in high-end luxury sedans from brands like BMW, Mercedes-Benz, and Audi (BBA), becoming standard comfort features in million-yuan luxury cars. However, they didn't become mainstream technology in the early days because the manufacturing process of the entire shock absorption system, especially air springs, was immature, resulting in high unit prices and consequently, a lack of market for air pumps. In recent years, with the continuous expansion of the electric car market and advancements in technology, the production cost of air springs has decreased to less than one-tenth of its early cost. Air spring shock absorption systems have gradually become standard equipment in electric cars, and the air pump market is poised for explosive growth.

[0003] As the quality of new energy vehicles rapidly improves, consumers are demanding higher and higher performance from the overall vehicle. The main requirements for the chassis include: lightweight design, strength and safety, comfort, handling stability, and ground clearance. A high-performance air pump can improve the overall comfort and handling stability of a vehicle.

[0004] However, the manufacturing process of air pumps is novel, and there is still no mature experience. The assembly of the eccentric shaft assembly is particularly important, as its quality affects the output performance of the air pump motor, and consequently, the performance of the entire system. The assembly of the eccentric shaft assembly includes eccentric shaft assembly and counterweight assembly. Eccentric shaft assembly requires pressing the eccentric shaft onto the connecting rod assembly inside the air pump. There is a slight wobble at the connection point between the connecting rod assembly and the eccentric shaft. Counterweight assembly requires pressing the counterweight onto the eccentric shaft. Conventional assembly methods typically use two pressing devices to press the eccentric shaft and counterweight separately. However, this method requires large equipment space, high equipment cost, and requires transfer during assembly, resulting in repeated positioning of the air pump cylinder and eccentric shaft, which affects both assembly stability and efficiency. Summary of the Invention

[0005] The present invention aims to provide a press-fitting device for an eccentric shaft assembly to overcome the shortcomings of the prior art.

[0006] To solve the above-mentioned technical problems, the technical solution of the present invention is: a press-fitting device for an eccentric shaft assembly, comprising a press-fitting mechanism, a switching mechanism, a positioning mechanism, a first support mechanism, and a second support mechanism. The press-fitting mechanism and the positioning mechanism are arranged opposite each other on both sides of a worktable in a horizontal direction. The press-fitting mechanism is used to press workpiece one and workpiece two onto workpiece three, and includes a press-fitting seat that can move along the press-fitting direction and a first press-fitting head and a second press-fitting head arranged on the press-fitting seat. The first press-fitting head is used to position and press-fit workpiece one, and the second press-fitting head is used to position and press-fit workpiece two. The switching mechanism is arranged on the press-fitting seat, and its output end is provided with the first press-fitting head and the second press-fitting head, which is used to drive the first press-fitting head and the second press-fitting head to move to the corresponding press-fitting position. The positioning mechanism is used to position the workpiece three. The first support mechanism is arranged on the side of the positioning mechanism away from the press-fitting mechanism, and positions and supports the swinging part on the workpiece three to limit the swinging part when pressing workpiece one. The second support mechanism is arranged on the first support mechanism, and positions and supports the pressed workpiece one when pressing workpiece two.

[0007] Preferably, the pressing mechanism further includes a pressing cylinder and a guide rail. The pressing cylinder is fixed to one side of the workbench by a mounting base, and its output end is provided with a connector that connects to the pressing base. Multiple guide rails are provided below the pressing base. The guide rails are arranged along the pressing direction and are slidably connected to the slider provided on the pressing base.

[0008] Furthermore, in the aforementioned eccentric shaft assembly press-fitting device, the switching mechanism includes a switching cylinder, a switching seat, and a second guide rail. The switching cylinder is mounted on the press-fitting seat, and its output end is connected to the switching seat. Multiple second guide rails are provided between the switching seat and the press-fitting seat, and the switching seat and the second guide rails are slidably connected. Both the first and second press heads are mounted on the switching seat. Preferably, two sets of buffer components for positioning the press-fitting positions of workpiece one and workpiece two are also provided between the switching seat and the press-fitting seat.

[0009] Furthermore, in the aforementioned press-fitting device for the eccentric shaft assembly, the press head includes a sleeve seat and a pressure rod. The sleeve seat is disposed on the switching seat of the switching mechanism. The pressure rod is inserted into the sleeve seat and slidably connected to the sleeve seat. The front end of the pressure rod is provided with a positioning hole that is adapted to at least part of the shape of the workpiece. The positioning hole is provided with a positioning pin that is inserted into the workpiece. The front end of the pressure rod is also provided with a magnet for magnetically fixing the workpiece.

[0010] Furthermore, in the aforementioned press-fitting device for the eccentric shaft assembly, the first press head further includes a limiting rod and a third spring. The sleeve seat is provided with a through limiting hole, which is an elongated hole arranged along the axial direction of the sleeve seat. The limiting rod is disposed on the pressure rod and inserted into the limiting hole, which is slidably connected to the limiting hole. The rear end of the pressure rod extends through the sleeve seat to the outside of the sleeve seat. The third spring is disposed inside the sleeve seat and sleeved on the outside of the rear end of the pressure rod. The pressure rod is elastically connected to the sleeve seat through the third spring.

[0011] Furthermore, in the aforementioned eccentric shaft assembly press-fitting device, the positioning mechanism includes a positioning support base, a first positioning plate, a second positioning plate, and a side push plate. The positioning support base is located above the worktable. The first positioning plate is located on the side of the positioning support base near the press-fitting mechanism and is used to position the first side of the workpiece three. The second positioning plate is located below the first positioning plate and is used to position and support the workpiece three. The side push plate is located opposite to the first positioning plate on both sides of the workpiece three and can abut against and press the second side of the workpiece three under the action of external force. The first and second sides of the workpiece three are perpendicular to the press-fitting direction. The positioning mechanism also includes a side push cylinder, which is fixed above the worktable. Under the action of the side push cylinder, the side push plate can move along the press-fitting direction, thereby abutting against and pressing the second side of the workpiece three. The side push plate at least partially abuts against the second side of the workpiece three and avoids the press-fitting holes on the workpiece three.

[0012] Furthermore, in the aforementioned press-fitting device for the eccentric shaft assembly, the support mechanism includes a slide block, a sliding block, and a support cylinder. The slide block is fixed above the worktable, and the sliding block is inserted into the slide block and slidably connected to it. One end of the sliding block is provided with a push cylinder, and the other end is provided with a support cylinder. The positioning support base and the positioning plate are provided with a communicating sliding hole. The end of the support cylinder near the positioning mechanism is inserted into the sliding hole and slidably connected to the sliding hole under the action of the push cylinder. The end of the support cylinder near the positioning mechanism is provided with a support part. Under the action of the push cylinder, the support part abuts against one side of the swinging part of the workpiece three to limit the swinging of the swinging part.

[0013] Furthermore, in the aforementioned press-fitting device for the eccentric shaft assembly, the support mechanism further includes a locking component. The locking component includes a locking cylinder and a locking block. The locking cylinder is mounted on a slide block, and its output end is provided with a locking block. The slide block has a locking hole inside, and the slide block has an insertion hole communicating with the locking hole. The locking block is inserted into the insertion hole and slidably connected to the insertion hole. The end of the locking block away from the locking cylinder has a locking part, and the locking part cooperates with the locking rod located in the locking hole to lock the position of the slide block.

[0014] Furthermore, in the aforementioned eccentric shaft assembly press-fitting device, the second support mechanism is mounted on the slide block and includes a positioning support rod. The positioning support rod is inserted into the support cylinder and slidably connected to the support cylinder. The end of the positioning support rod is provided with a stop top and a positioning part. When pressing the workpiece two, the positioning support rod and the second press head are positioned opposite each other at both ends of the pressed workpiece one. Under the action of external force, the stop top abuts against the end face of the workpiece one to support the workpiece one, and the positioning part is inserted into the workpiece one to position the workpiece one.

[0015] Furthermore, in the aforementioned press-fitting device for the eccentric shaft assembly, the second support mechanism further includes a buffer rod, a first spring, and a second spring. The buffer rod is located inside the sliding block and slidably connected to the sliding block, and is coaxially positioned behind the positioning support rod. The first spring is sleeved outside the buffer rod, with its first end connected to the stepped surface on the buffer rod and its second end connected to the positioning support rod. The second spring is sleeved outside the positioning support rod, with its first end connected to the stepped surface on the positioning support rod and its second end connected to the stepped surface inside the support cylinder.

[0016] Furthermore, in the aforementioned press-fitting device for the eccentric shaft assembly, the second support mechanism further includes a drive cylinder and a drive block. The drive cylinder is mounted on the sliding block, and its output end is provided with a drive block. The sliding block is provided with a through sliding hole, and the drive block is inserted into the sliding hole and slidably connected to the sliding hole. The end of the drive block near the positioning support rod is provided with a drive inclined surface. Under the action of the drive cylinder, the drive inclined surface cooperates with the end face of the positioning support rod to move the positioning support rod in the opposite direction of press-fitting to position and support the workpiece one.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows: The present invention integrates the eccentric shaft pressing and counterweight pressing of the eccentric shaft assembly into one unit and uses a single pressing mechanism for pressing, which greatly saves space and cost and improves assembly efficiency; it also uses the corresponding support mechanism one and support mechanism two for positioning and assisting pressing, eliminating the need for transfer, greatly reducing the number of positioning times, improving pressing convenience and assembly stability, and further improving assembly efficiency and assembly quality. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the press-fitting device for the eccentric shaft assembly of the present invention. Figure 1 ; Figure 2 This is a schematic diagram of the press-fitting device for the eccentric shaft assembly of the present invention. Figure 2 ; Figure 3 This is a cross-sectional structural schematic diagram of the press-fitting device for the eccentric shaft assembly of the present invention; Figure 4 for Figure 3 A partial enlarged structural diagram of part A in the diagram; Figure 5 for Figure 3A magnified schematic diagram of the B section in the diagram; In the diagram: 101, workpiece one; 102, workpiece two; 103, workpiece three; 1. Pressing mechanism; 11. Pressing base; 12. Pressing head one; 121. Sleeve base; 1211. Limiting hole; 122. Pressure rod; 1221. Positioning hole; 123. Positioning pin; 124. Limiting rod; 125. Spring three; 13. Pressing head two; 14. Pressing cylinder; 15. Guide rail one; 2. Switching mechanism; 21. Switching cylinder; 22. Switching seat; 23. Guide rail two; 3. Positioning mechanism; 31. Positioning support seat; 32. Positioning plate one; 33. Positioning plate two; 34. Side push plate; 35. Side push cylinder; 4. Support mechanism one; 41. Slide block; 42. Sliding block; 421. Locking hole; 422. Sliding hole; 43. Support cylinder; 44. Push cylinder; 45. Locking cylinder; 46. Locking block; 47. Locking rod; 5. Support mechanism two; 51. Positioning support rod; 511. Stop top; 512. Positioning part; 52. Buffer rod; 53. Spring one; 54. Spring two; 55. Drive cylinder; 56. Drive block; 561. Drive inclined plane; 6. Workbench. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] Example like Figure 1-5As shown, a press-fitting device for an eccentric shaft assembly includes a press-fitting mechanism 1, a switching mechanism 2, a positioning mechanism 3, a first support mechanism 4, and a second support mechanism 5. The press-fitting mechanism 1 and the positioning mechanism 3 are arranged opposite each other on both sides of a worktable 6 in a horizontal direction. The press-fitting mechanism 1 is used to press workpiece 101 and workpiece 202 onto workpiece 303. It includes a press-fitting seat 11 that can move along the press-fitting direction and a first press head 12 and a second press head 13 disposed on the press-fitting seat 11. The first press head 12 is used to position and press-fit workpiece 101, and the second press head 13 is used to position and press-fit workpiece 203. 2; The switching mechanism 2 is located on the pressing base 11, and its output end is provided with a pressing head 12 and a pressing head 23, which are used to drive the pressing head 12 and the pressing head 23 to move to the corresponding pressing position. The positioning mechanism 3 is used to position the workpiece 3 103. The support mechanism 1 4 is located on the side of the positioning mechanism 3 away from the pressing mechanism 1. When pressing the workpiece 1 101, the support mechanism 1 4 positions and supports the swing part on the workpiece 3 103 to limit the swing of the swing part. The support mechanism 2 5 is located on the support mechanism 1 4. When pressing the workpiece 2, it is used to position and support the workpiece 1 101 after pressing.

[0022] This invention is mainly used for assembling the eccentric assembly of an air pump. The aforementioned workpiece 101 is an eccentric shaft, workpiece 102 is a counterweight, and workpiece 103 is the air pump cylinder body. During assembly, the eccentric shaft (workpiece 101) is first pressed onto the connecting rod assembly of the air pump cylinder body (workpiece 103), specifically pressed into the bearing at the swing end of the connecting rod assembly; then, the counterweight (workpiece 102) is pressed onto the eccentric shaft.

[0023] In the above structure, such as Figure 1-3 As shown, the pressing mechanism 1 also includes a pressing cylinder 14 and a guide rail 15. The pressing cylinder 14 is fixed to one side of the workbench 6 by a mounting base. Its output end is provided with a connector that connects to the pressing base 11. Multiple guide rails 15 are provided below the pressing base 11. The guide rails 15 are arranged along the pressing direction and are slidably connected to the slider provided on the pressing base 11. The pressing base is driven to move along the pressing direction by the pressing cylinder.

[0024] like Figure 1-3 As shown, the switching mechanism 2 includes a switching cylinder 21, a switching seat 22, and a second guide rail 23. The switching cylinder 21 is mounted on the pressing seat 11, and its output end is connected to the switching seat 22. Multiple second guide rails 23 are provided between the switching seat 22 and the pressing seat 11. The switching seat 22 and the second guide rails 23 are slidably connected. The first pressing head 12 and the second pressing head 13 are both mounted on the switching seat 22. Two sets of buffer components are also provided between the switching seat 22 and the pressing seat 11 for positioning the pressing positions of the first workpiece 101 and the second workpiece 102.

[0025] like Figure 3-4As shown, the pressure head 12 includes a sleeve seat 121 and a pressure rod 122. The sleeve seat 121 is mounted on the switching seat 22. The pressure rod 122 is inserted into the sleeve seat 121 and slidably connected to it. The front end of the pressure rod 122 has a positioning hole 1221 that matches at least part of the shape of the eccentric shaft. Inside the positioning hole 1221 is a positioning pin 123 that engages with the eccentric shaft. The front end of the pressure rod 122 also has a magnet for magnetically fixing the eccentric shaft. The eccentric shaft is aligned through the positioning hole 1221, and its eccentric direction is determined by the positioning pin 123, thus positioning the eccentric shaft. Furthermore, after pressing, the eccentric shaft is tightly fitted to the cylinder body. When the pressing mechanism 1 retracts to its original position, the magnetic attraction of the magnet is weak, and the eccentric shaft disengages from the pressure head 12, completing the pressing of the eccentric shaft.

[0026] The pressure head 12 also includes a limiting rod 124 and a spring 125. The sleeve seat 121 has a through limiting hole 1211, which is an elongated hole arranged along the axial direction of the sleeve seat 121. The limiting rod 124 is disposed on the pressure rod 122 and inserted into the limiting hole 1211, which is slidably connected to the limiting hole 1211. The setting of the limiting rod 124 and the limiting hole 1211 limits the sliding stroke of the pressure rod 122 in the sleeve seat 121. The rear end of the pressure rod 122 extends through the sleeve seat 121 to the outside of the sleeve seat 121. It can cooperate with the pressure sensor disposed on the pressing seat 11 to control the pressing pressure. The spring 125 is disposed in the sleeve seat 121 and sleeved on the outside of the rear end of the pressure rod 122. The pressure rod 122 is elastically connected to the sleeve seat 121 through the spring 125, which can provide pressing buffer when pressing the eccentric shaft, reduce the impact on the equipment, and improve the working stability.

[0027] In addition, the second pressure head 13 is similar in structure to the first pressure head 12. The difference lies in the positioning structure of the counterweight on the pressure rod of the second pressure head 13, which will not be described in detail here.

[0028] Among them, such as Figure 1-5As shown, the positioning mechanism 3 includes a positioning support 31, a first positioning plate 32, a second positioning plate 33, and a side push plate 34. The positioning support 31 is located above the worktable 6. The first positioning plate 32 is located on the side of the positioning support 31 near the pressing mechanism 1 and is used to position the first side of the cylinder. The second positioning plate 33 is located below the first positioning plate 32 and is used to position and support the cylinder. The side push plate 34 is located opposite to the first positioning plate 32 on both sides of the cylinder and can abut against and press the second side of the cylinder under the action of external force. The first and second sides of the cylinder are perpendicular to the pressing direction. In addition, the positioning mechanism 3 also includes a side push cylinder 35, which is fixed above the worktable 6. The side push plate 34 can move along the pressing direction under the action of the side push cylinder 35, thereby abutting against and pressing the second side of the cylinder. The side push plate 34 at least partially abuts against the second side of the cylinder and avoids the pressing hole on the cylinder. The side push plate, together with positioning plate one and positioning plate two, completely positions the cylinder body, aligning the pressing holes on the cylinder body with pressing head one or pressing head two. The structure is simple, the loading and unloading are convenient, and the assembly efficiency is improved.

[0029] In addition, such as Figure 2 , Figure 5 As shown, the positioning support is also equipped with an adjustment mechanism for adjusting the positions of positioning plate 1 32 and positioning plate 2 33. Once the adjustment mechanism is adjusted before assembly, it does not need to be changed, which can eliminate errors and ensure that the press-fit hole on the cylinder body is aligned with press head 1 or press head 2.

[0030] like Figure 1-5 As shown, the support mechanism 4 includes a slide 41, a sliding block 42, and a support cylinder 43. The slide 41 is fixed above the worktable 6. The sliding block 42 is inserted into the slide 41 and slidably connected to the slide 41. One end of the sliding block 42 is provided with a push cylinder 44, and the other end is provided with a support cylinder 43. The positioning support base 31 and the positioning plate 32 are provided with a communicating sliding hole. The sliding hole is coaxially arranged with the press-fit hole on the cylinder body to guide and support the support cylinder 43. The end of the support cylinder 43 near the positioning mechanism 3 is inserted into the sliding hole and slidably connected to the sliding hole under the action of the push cylinder 44. The end of the support cylinder 43 near the positioning mechanism 3 is provided with a support part. Under the action of the push cylinder 44, the support part abuts against one side of the swing part of the cylinder body to limit the swing of the swing part. Specifically, the support part abuts against the inner ring of the bearing of the connecting rod assembly. By abutting against one side of the inner ring of the bearing of the swing part, the swing part is positioned and supported, thereby limiting its swing and aligning the bearing hole with the eccentric shaft, so that the eccentric shaft can be smoothly press-fitted into the bearing hole.

[0031] like Figure 1-3As shown, the support mechanism 4 also includes a locking component, which includes a locking cylinder 45 and a locking block 46. The locking cylinder 45 is mounted on the slide block 41, and its output end is provided with the locking block 46. In this embodiment, the locking cylinder 45 is arranged perpendicularly to the push cylinder 44. The slide block 42 is provided with a locking hole 421 inside. The slide block 41 is provided with a socket that communicates with the locking hole 421. The locking block 46 is inserted into the socket and slidably connected to the socket. The end of the locking block 46 away from the locking cylinder 45 is provided with a locking part. The locking part cooperates with the locking rod 47 located in the locking hole 421 to lock the position of the slide block 42, thereby locking the position of the support cylinder 43. The locking part is an inclined surface, and the locking rod 47 is provided with an inclined surface or arc surface that cooperates with the inclined surface, resulting in a large and stable locking force.

[0032] When the support cylinder 43 abuts against one side of the cylinder swinging part under the action of the push cylinder 44, the locking component is activated to lock the position of the sliding block 42 and the support cylinder 43. This not only ensures that the support cylinder 43 supports the swinging part and ensures the stability of the pressing, but also reduces the damage to the push cylinder 44 and other components by the pressing force during pressing, thus extending the service life of the equipment.

[0033] like Figure 1-5 As shown, the second support mechanism 5 is mounted on the slide block 41 and moves synchronously with the support cylinder 43. The second support mechanism 5 includes a positioning support rod 51, a drive cylinder 55, and a drive block 56. The positioning support rod 51 is inserted into the support cylinder 43 and is slidably connected to the support cylinder 43 to improve the convenience of pressing the assembly weight. The end of the positioning support rod 51 is provided with a stop top 511 and a positioning part 512. When pressing the assembly weight, the positioning support rod 51 and the second press head 13 are positioned opposite each other at both ends of the eccentric shaft after pressing. Under the action of the drive cylinder 55, the stop top 511 abuts against the end face of the eccentric shaft to support the eccentric shaft, and the positioning part 512 is inserted into the eccentric shaft to position the eccentric shaft.

[0034] Specifically, such as Figure 5 As shown, the drive cylinder 55 is mounted on the sliding block 42, and its output end is provided with a drive block 56. The sliding block 42 has a through sliding hole 422, and the drive block 56 is inserted into the sliding hole 422 and slidably connected to the sliding hole 422. The end of the drive block 56 near the positioning support rod 51 is provided with a drive inclined surface 561. Under the action of the drive cylinder 55, the drive block 56 moves downward, and the drive inclined surface 561 cooperates with the end face of the positioning support rod 51 to allow the positioning support rod 51 to move in the opposite direction of press-fitting and extend out of the support cylinder 43. The positioning support rod positions and supports the eccentric shaft, and the drive inclined surface 561 cooperates with the end face of the positioning support rod 51 to lock the position of the positioning support rod. In addition, the drive block 56 has a cavity inside for the movement of the buffer rod 52 and the positioning support rod 51.

[0035] like Figure 5As shown, the second support mechanism 5 also includes a buffer rod 52, a first spring 53, and a second spring 54. The buffer rod 52 is located inside the sliding block 42 and is slidably connected to the sliding block 42. The buffer rod 52 is coaxially arranged on the rear side of the positioning support rod 51. The first spring 53 is sleeved on the outside of the buffer rod 52, with its first end connected to the stepped surface on the buffer rod 52 and its second end connected to the positioning support rod 51. The second spring 54 is sleeved on the outside of the positioning support rod 51, with its first end connected to the stepped surface on the positioning support rod 51 and its second end connected to the stepped surface inside the support cylinder 43. Through the arrangement of the first spring 53 and the second spring 54, the positioning support rod 51 is elastically connected to the sliding block 42, and provides pressure cushioning when pressing the counterweight, reducing the impact on the equipment and workpiece and improving working stability.

[0036] This invention integrates the eccentric shaft press-fitting and counterweight press-fitting of the eccentric shaft assembly into one unit, and uses a single press-fitting mechanism for press-fitting, which greatly saves space and cost and improves assembly efficiency. Furthermore, the invention uses a matching support mechanism one and a support mechanism two for positioning and assisting press-fitting, eliminating the need for intermediate transfers, greatly reducing the number of positioning operations, improving press-fitting convenience and assembly stability, and further improving assembly efficiency and quality.

[0037] It should be noted that this invention is applicable not only to the assembly of eccentric components of air pumps, but also to the integrated assembly of similar shaft components.

[0038] It will be apparent 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 invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0039] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A press-fitting device for an eccentric shaft assembly, characterized in that: The system includes a pressing mechanism (1), a switching mechanism (2), a positioning mechanism (3), a first support mechanism (4), and a second support mechanism (5). The pressing mechanism (1) and the positioning mechanism (3) are arranged opposite each other on both sides of the worktable (6) in the horizontal direction. The pressing mechanism (1) is used to press workpiece one (101) and workpiece two (102) onto workpiece three (103). It includes a pressing seat (11) that can move along the pressing direction and a pressing head one (12) and a pressing head two (13) provided on the pressing seat (11). The pressing head one (12) is used to position and press workpiece one (101), and the pressing head two (13) is used to position and press. Workpiece 2 (102); The switching mechanism (2) is located on the pressing base (11) and is used to drive the first pressing head (12) and the second pressing head (13) to move to the corresponding pressing position. The positioning mechanism (3) is used to position the third workpiece (103). The first support mechanism (4) is located on the side of the positioning mechanism (3) away from the pressing mechanism (1) and is used to position and support the swing part on the third workpiece (103) to limit the swing of the swing part when pressing the first workpiece (101). The second support mechanism (5) is located on the first support mechanism (4) and is used to position and support the first workpiece (101) after pressing when pressing the second workpiece (102).

2. The press-fitting device for the eccentric shaft assembly according to claim 1, characterized in that: The switching mechanism (2) includes a switching cylinder (21), a switching seat (22), and a second guide rail (23). The switching cylinder (21) is mounted on the press seat (11), and its output end is connected to the switching seat (22). Multiple second guide rails (23) are provided between the switching seat (22) and the press seat (11). The switching seat (22) and the second guide rails (23) are slidably connected. The first pressure head (12) and the second pressure head (13) are both mounted on the switching seat (22).

3. The press-fitting device for the eccentric shaft assembly according to claim 1, characterized in that: The pressure head (12) includes a sleeve seat (121) and a pressure rod (122). The sleeve seat (121) is located on the switching seat (22) of the switching mechanism (2). The pressure rod (122) is inserted into the sleeve seat (121) and is slidably connected to the sleeve seat (121). The front end of the pressure rod (122) is provided with a positioning hole (1221) that is adapted to at least part of the shape of the workpiece (101). The positioning hole (1221) is provided with a positioning pin (123) that is inserted into the workpiece (101). The front end of the pressure rod (122) is also provided with a magnet for magnetically fixing the workpiece (101).

4. The press-fitting device for the eccentric shaft assembly according to claim 3, characterized in that: The pressure head (12) also includes a limiting rod (124) and a spring (125). The sleeve seat (121) is provided with a through limiting hole (1211). The limiting hole (1211) is an elongated hole arranged along the axial direction of the sleeve seat (121). The limiting rod (124) is provided on the pressure rod (122) and inserted into the limiting hole (1211) and slidably connected with the limiting hole (1211). The rear end of the pressure rod (122) extends through the sleeve seat (121) to the outside of the sleeve seat (121). The spring (125) is provided inside the sleeve seat (121) and sleeved on the outside of the rear end of the pressure rod (122). The pressure rod (122) is elastically connected to the sleeve seat (121) through the spring (125).

5. The press-fitting device for the eccentric shaft assembly according to claim 1, characterized in that: The positioning mechanism (3) includes a positioning support (31), a positioning plate one (32), a positioning plate two (33), and a side push plate (34). The positioning support (31) is located above the workbench (6). The positioning plate one (32) is located on the side of the positioning support (31) near the pressing mechanism (1) and is used to position the first side of the workpiece three (103). The positioning plate two (33) is located below the positioning plate one (32) and is used to support the workpiece three (103). The side push plate (34) is located opposite to the positioning plate one (32) on both sides of the workpiece three (103) and can press against the second side of the workpiece three (103) under the action of external force.

6. The press-fitting device for the eccentric shaft assembly according to claim 5, characterized in that: The support mechanism 1 (4) includes a slide (41), a sliding block (42), and a support cylinder (43). The slide (41) is fixed above the worktable (6). The sliding block (42) is inserted into the slide (41) and slidably connected to the slide (41). One end of the sliding block (42) is provided with a push cylinder (44), and the other end is provided with a support cylinder (43). The positioning support base (31) and the positioning plate 1 (32) are provided with a communicating sliding hole. One end of the support cylinder (43) near the positioning mechanism (3) is inserted into the sliding hole and slidably connected to the sliding hole. One end of the support cylinder (43) near the positioning mechanism (3) is provided with a support part. Under the action of the push cylinder (44), the support part abuts against one side of the swing part of the workpiece 3 (103) to limit the swing of the swing part.

7. The press-fitting device for the eccentric shaft assembly according to claim 6, characterized in that: The support mechanism (4) further includes a locking component, which includes a locking cylinder (45) and a locking block (46). The locking cylinder (45) is mounted on the slide (41), and its output end is provided with a locking block (46). The slide block (42) has a locking hole (421) inside. The slide (41) has a socket that communicates with the locking hole (421). The locking block (46) is inserted into the socket and slidably connected to the socket. The locking block (46) has a locking part at one end away from the locking cylinder (44). The locking part cooperates with the locking rod (47) located in the locking hole (421) to lock the position of the slide block (42).

8. The press-fitting device for the eccentric shaft assembly according to claim 6, characterized in that: The second support mechanism (5) is mounted on the slide (41) and includes a positioning support rod (51). The positioning support rod (51) is inserted into the support cylinder (43) and is slidably connected to the support cylinder (43). The end of the positioning support rod (51) is provided with a stop top (511) and a positioning part (512). When pressing the second workpiece (102), the positioning support rod (51) and the second press head (13) are positioned opposite each other at both ends of the first workpiece (101) after pressing. Under the action of external force, the stop top (511) abuts against the end face of the first workpiece (101) to support the first workpiece. The positioning part (512) is inserted into the first workpiece (101) to position the first workpiece (101).

9. The press-fitting device for the eccentric shaft assembly according to claim 8, characterized in that: The second support mechanism (5) further includes a buffer rod (52), a first spring (53), and a second spring (54). The buffer rod (52) is located inside the sliding block (42) and is slidably connected to the sliding block (42). The buffer rod (52) is coaxially located on the rear side of the positioning support rod (51). The first spring (53) is sleeved on the outside of the buffer rod (52). The first end of the first spring (53) is connected to the step surface on the buffer rod (52), and the second end is connected to the positioning support rod (51). The second spring (54) is sleeved on the outside of the positioning support rod (51). The first end of the second spring (54) is connected to the step surface on the positioning support rod (51), and the second end is connected to the step surface inside the support cylinder (43).

10. The press-fitting device for the eccentric shaft assembly according to claim 9, characterized in that: The second support mechanism (5) further includes a drive cylinder (55) and a drive block (56). The drive cylinder (56) is mounted on the sliding block (42), and its output end is provided with a drive block (56). The sliding block (56) is provided with a through sliding hole (422). The drive block (56) is inserted into the sliding hole (422) and slidably connected to the sliding hole (422). The end of the drive block (56) near the positioning support rod (51) is provided with a drive inclined surface (561). Under the action of the drive cylinder (55), the drive inclined surface (561) cooperates with the end face of the positioning support rod (51) to move the positioning support rod (51) in the opposite direction of press fitting to position and support the workpiece (101).

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