Riveting machine and housing riveting components

Abstract

This utility model discloses a riveting machine and a housing riveting component, including a positioning seat, a rivet claw, and a rivet base. The inner diameter of the positioning seat is larger than the outer diameter of the housing. The inner peripheral wall of the positioning seat is interference-fitted with the outer peripheral wall of the rivet claw. The end of the rivet claw is provided with a claw head for riveting the top surface of the housing. One end of the rivet base is detachably connected to the rivet claw and the positioning seat, and the other end of the rivet base is provided with a connecting rod for connecting to a piston drive component. The interference fit achieves pre-positioning of the positioning seat and the rivet claw. When the piston drive component drives the connecting rod, the claw head applies precise radial compression to the top surface of the housing, causing plastic deformation of the inner wall thread of the housing and reducing the pitch, thereby locking the pressure block plug to the housing. This solves the problem of gap changes caused by the pressure block plug loosening in traditional riveting. The first riveting body and the positioning seat form a bidirectional clamping force, firmly locking the rivet claw between them, ensuring uniform transmission of riveting pressure.

Description

Technical Field

[0001] This utility model relates to the field of steering gear technology, specifically to a riveting machine and a housing riveting component. Background Technology

[0002] In rack-and-pinion electric power steering systems, the meshing clearance between the gear shaft and the rack is a core parameter affecting steering performance. If this clearance exceeds the design threshold, it will directly lead to increased steering torque fluctuations and exacerbated abnormal noises from the rack and pinion meshing. To address the issue of increased clearance due to long-term wear, the industry has developed a dynamic clearance adjustment mechanism. This mechanism involves a pressure block screwing into a housing thread to compress a disc spring assembly, generating axial preload. The spring then pushes a wear-resistant slider to press against the rack, creating a constant zero-clearance meshing between the rack and gear shaft. However, the continuous pressure from the spring's reaction force against the pressure block, while preventing slippage through the threaded self-locking mechanism, still poses a risk of loosening under high-frequency vibration conditions in vehicles. This leads to preload decay and the recurrence of meshing clearance. Utility Model Content

[0003] To address the aforementioned technical problems, this utility model proposes a riveting machine and a housing riveting component. The riveting claw applies precise radial extrusion to the top surface of the housing, causing plastic deformation of the inner wall threads of the housing and reducing the thread pitch, thereby locking the pressure block plug to the housing and solving the problem of gap changes caused by the loosening of the pressure block plug in traditional riveting.

[0004] The technical solution adopted by this utility model is as follows: a housing riveting component, including a positioning seat, a rivet claw, and a rivet base. The inner diameter of the positioning seat is larger than the outer diameter of the housing. The inner peripheral wall of the positioning seat is interference-fitted with the outer peripheral wall of the rivet claw. The end of the rivet claw is provided with a claw head for riveting the top surface of the housing. One end of the rivet base is detachably connected to the rivet claw and the positioning seat respectively. The other end of the rivet base is provided with a connecting rod for connecting to a piston drive component.

[0005] Optionally, the rivet base includes a second rivet body and a first rivet body installed at one end of the second rivet body, the connecting rod is installed at the other end of the second rivet body, the outer peripheral wall of the first rivet body is interference-fitted with the inner peripheral wall of the rivet claw, and the second rivet body is detachably connected to the positioning seat and the rivet claw.

[0006] Optionally, the rivet claw includes an annular connecting seat and multiple claw bodies. The connecting seat is provided with multiple slots along the circumference. The claw bodies are matched with the slots one by one. The second rivet body is provided with a first through hole. The connecting seat is provided with a second through hole that is coaxial with the first through hole.

[0007] Optionally, the claw body includes a claw head with progressively increasing width, a stepped portion, and a connecting portion, wherein the connecting portion engages with a slot.

[0008] Optionally, the positioning seat has a first lug with a third through hole on its outer periphery, and the second rivet body has a second lug with a fourth through hole, wherein the third through hole and the fourth through hole are coaxially corresponding.

[0009] Optionally, the inner peripheral wall of the positioning seat is provided with a retaining ring, and the connecting part of multiple claw bodies is arranged along the circumference of the connecting seat to form a claw ring. The inner diameter of the retaining ring is smaller than the diameter of the claw ring, and the end face of the claw head protrudes out of the axial plane of the retaining ring.

[0010] Optionally, the connecting rod is provided with a groove for riveting the piston drive component clamp.

[0011] This utility model also discloses a riveting machine, including a piston drive and the aforementioned housing riveting component, wherein the housing riveting component is connected to the output end of the piston drive.

[0012] The beneficial effects of this utility model are as follows: Pre-positioning of the positioning seat and the rivet claw is achieved through an interference fit. When the piston drive unit drives the connecting rod, the claw head applies precise radial compression to the top surface of the housing, causing plastic deformation of the inner wall thread of the housing and reducing the pitch, thus locking the pressure block plug to the housing. This solves the problem of gap changes caused by the loosening of the pressure block plug in traditional riveting. The inner diameter of the retaining ring is smaller than the diameter of the claw ring, and the end face of the claw head protrudes beyond the axial plane of the retaining ring, restricting the axial movement of the rivet claw and ensuring that the claw head preferentially contacts the top surface of the housing. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of the shell riveting component proposed in an embodiment of this utility model;

[0014] Figure 2 This is an exploded view of the shell riveting component proposed in an embodiment of this utility model;

[0015] Figure 3 This is a schematic diagram of the rivet claw of the shell riveting component proposed in an embodiment of this utility model.

[0016] The markings in the attached figures are as follows: 1. Positioning seat; 11. First lug; 111. Third through hole; 12. Retaining ring; 2. Claw body; 21. Claw head; 22. Stepped part; 23. Connecting part; 3. Connecting seat; 31. Slot; 32. Second through hole; 4. Rivet seat; 41. First rivet body; 42. Second rivet body; 421. First through hole; 422. Second lug; 4221. Fourth through hole; 43. Connecting rod. Detailed Implementation

[0017] The present application will now be described in further detail with reference to the accompanying drawings and embodiments.

[0018] like Figures 1 to 3As shown, this embodiment discloses a housing riveting component, including a positioning seat 1, a rivet claw, and a rivet base 4. The inner diameter of the positioning seat 1 is larger than the outer diameter of the housing. The inner peripheral wall of the positioning seat 1 is interference-fitted with the outer peripheral wall of the rivet claw. The end of the rivet claw is provided with a claw head 21 for riveting the top surface of the housing. One end of the rivet base 4 is detachably connected to the rivet claw and the positioning seat 1, and the other end of the rivet base 4 is provided with a connecting rod for connecting to a piston drive component. The interference fit achieves the pre-positioning of the positioning seat 1 and the rivet claw. When the piston drive component drives the connecting rod, the claw head 21 applies precise radial compression to the top surface of the housing, causing plastic deformation of the inner wall thread of the housing and reducing the pitch, thereby locking the pressure block plug to the housing and solving the problem of gap changes caused by the loosening of the pressure block plug in traditional riveting.

[0019] like Figure 1 As shown, the rivet base 4 includes a second rivet body 42 and a first rivet body 41 installed at one end of the second rivet body 42. The connecting rod is installed at the other end of the second rivet body 42. The outer peripheral wall of the first rivet body 41 is interference-fitted with the inner peripheral wall of the rivet claw. The second rivet body 42 is detachably connected to the positioning seat 1 and the rivet claw. The first rivet body 41 and the positioning seat 1 form a bidirectional clamping force, firmly locking the rivet claw between them, thus ensuring uniform transmission of riveting pressure.

[0020] like Figure 1 and 2 As shown, the rivet claw includes an annular connecting seat 3 and multiple claw bodies 2. The connecting seat 3 has multiple slots 31 along its circumference, and the claw bodies 2 are matched one-to-one with the slots 31. The second rivet body 42 has a first through hole, and the connecting seat 3 has a second through hole 32 coaxially corresponding to the first through hole. A pin passes through the first through hole and the second through hole 32 to fix the rivet claw and the rivet seat 4. The modular design of the claw body 2 allows for the replacement of individual claw bodies 2, reducing maintenance costs.

[0021] like Figure 1 As shown, the claw body 2 includes a claw head 21 with progressively increasing width, a stepped portion 22, and a connecting portion 23, the connecting portion 23 engaging with the slot 31. The claw body 2 is integrally cast. The claw head 21, with the smallest width, is used to focus local stress to efficiently reduce the thread pitch; the stepped portion 22, with its gradually increasing width, is arranged in a stepped shape to enhance bending strength and resist riveting reaction force; the connecting portion 23, with the largest width, is used for snap-fit ​​fixation.

[0022] like Figure 1 and 3 As shown, the positioning seat 1 has a first lug 11 with a third through hole 111 on its outer periphery, and the second rivet body 42 has a second lug with a fourth through hole. The third through hole 111 and the fourth through hole are coaxially corresponding. A pin passes through the third through hole 111 and the fourth through hole to fix the positioning seat 1 and the rivet seat 4 together.

[0023] like Figure 1 As shown, the inner peripheral wall of the positioning seat 1 is provided with a retaining ring 12, and multiple claw bodies 2 are arranged circumferentially along the connecting seat 3 to form a claw ring. The inner diameter of the retaining ring 12 is smaller than the diameter of the claw ring, and the end face of the claw head 21 protrudes from the axial plane of the retaining ring 12. The retaining ring 12 is annular, which restricts the axial movement of the rivet claw and ensures that the claw head 21 preferentially contacts the top surface of the housing.

[0024] like Figure 1 As shown, the connecting rod 43 is provided with a groove for riveting the piston drive component clamp. The groove is used to form an anti-disengagement engagement with the piston drive component's locking mechanism.

[0025] In this embodiment, the present invention also discloses a riveting machine, including a piston drive (not shown in the figure) and the aforementioned housing riveting component, wherein the housing riveting component is connected to the output end of the piston drive. The piston drive can be a hydraulic cylinder or a pneumatic cylinder.

[0026] It is understood that the specific embodiments described above are merely for explaining the relevant utility model and not for limiting the utility model. It should also be noted that, for ease of description, only the parts related to the utility model are shown in the accompanying drawings. Multiple technical solutions in the same embodiment, as well as multiple technical solutions in different embodiments, can be arranged and combined to form new technical solutions that do not contradict or conflict with each other. All equivalent structural transformations made based on the content of this utility model specification and drawings, directly or indirectly applied to other related technical fields, are similarly included within the protection scope of this utility model.

Claims

1. A housing swaging member characterized by, It includes a positioning seat, a rivet claw, and a rivet base. The inner diameter of the positioning seat is larger than the outer diameter of the housing. The inner peripheral wall of the positioning seat is interference-fitted with the outer peripheral wall of the rivet claw. The end of the rivet claw is provided with a claw head for riveting the top surface of the housing. One end of the rivet base is detachably connected to the rivet claw and the positioning seat respectively. The other end of the rivet base is provided with a connecting rod for connecting to the piston drive component.

2. The shell swaging member of claim 1, wherein, The rivet base includes a second rivet body and a first rivet body installed at one end of the second rivet body. The connecting rod is installed at the other end of the second rivet body. The outer peripheral wall of the first rivet body is interference-fitted with the inner peripheral wall of the rivet claw. The second rivet body is detachably connected to the positioning seat and the rivet claw.

3. The shell swaging member of claim 2, wherein, The rivet claw includes an annular connecting seat and multiple claw bodies. The connecting seat is provided with multiple slots along the circumference. The claw bodies are matched with the slots one by one. The second rivet body is provided with a first through hole. The connecting seat is provided with a second through hole that is coaxial with the first through hole.

4. The shell swaging member of claim 3, wherein, The claw body includes a claw head, a stepped portion, and a connecting portion with progressively increasing width, the connecting portion cooperating with a slot.

5. The shell swaging member of claim 2, wherein, The positioning seat is provided with a first lug having a third through hole on its outer periphery, and the second rivet body is provided with a second lug having a fourth through hole. The third through hole and the fourth through hole are coaxially corresponding.

6. The shell swaging member of claim 1, wherein, The positioning seat has a retaining ring on its inner peripheral wall, and the connecting parts of multiple claw bodies are arranged along the circumference of the connecting seat to form a claw ring. The inner diameter of the retaining ring is smaller than the diameter of the claw ring, and the end face of the claw head protrudes from the axial plane of the retaining ring.

7. The shell swaging member of claim 1, wherein, The connecting rod is provided with a groove for riveting the piston drive component clamp.

8. A riveter characterized by comprising: It includes a piston drive and a housing riveting member as described in any one of claims 1 to 7, wherein the housing riveting member is connected to the output end of the piston drive.

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