Steel sleeve press fitting device for brake hanger

Abstract

This utility model relates to the field of press-fitting equipment, and provides a steel sleeve press-fitting device for brake hangers. The steel sleeve press-fitting device for brake hangers includes a coaxiality assembly for passing through the mounting hole of the brake hanger. The coaxiality assembly includes a detachably connected first joint and a second joint. A first positioning platform is fitted onto the first joint, and a second positioning platform is fitted onto the second joint. The opposite sides of the first and second positioning platforms are respectively used for positioning and fitting the steel sleeve. A press-fitting assembly includes a fixed base and a push rod. The coaxiality assembly is detachably mounted on the fixed base, and the push rod passes through the fixed base and abuts against the first or second positioning platform. A driving member is connected to the push rod and is adapted to drive the first or second positioning platform to move axially along the mounting hole of the brake hanger, thereby pressing the steel sleeve into the mounting hole of the brake hanger. This steel sleeve press-fitting device for brake hangers reduces the coaxiality error during steel sleeve press-in and avoids deformation of the steel sleeve due to eccentricity.

Description

Technical Field

[0001] This utility model relates to the field of press-fitting equipment, and provides a steel sleeve press-fitting device for brake hangers. Background Technology

[0002] During operation, the braking performance of the bogies directly affects the safety and comfort of urban rail vehicles. The bogie braking system applies braking force to the brake discs through brake calipers to ensure the train can stop smoothly. In particular, steel sleeves need to be press-fitted into the mounting holes of the bogie hangers before the assembly of the bogie suspension bolts. Although traditional press-fitting methods can achieve the installation of steel sleeves, there are many problems in practical applications, which limit the efficiency and quality control of the press-fitting process.

[0003] First, traditional press-fitting methods use large hydraulic cylinders and pumps connected by a central lead screw. This device is quite bulky, requiring a large area for construction. In confined spaces, such as inside the bogies of urban rail vehicles, this device is often difficult to operate, increasing construction difficulty and time costs. Furthermore, because it requires two people to operate—one to assemble the hydraulic cylinders and accessories, and the other to operate the hydraulic pump—the overall efficiency is low.

[0004] Secondly, the press-fitting method using lead screws is prone to causing the fluoroplastic bushing of the steel sleeve to detach during the press-fitting process. This is because the movement of the hydraulic cylinder exerts an impact force on the steel sleeve, which may damage the bushing film layer, affecting the sealing performance and usability of the steel sleeve. More importantly, due to the gravity of the hydraulic cylinder, the axis of the steel sleeve, the axis of the frame hanger mounting hole, and the axis of the lead screw may deviate, thus affecting the press-fitting accuracy and reducing the installation effect. In addition, prolonged and frequent use of the hydraulic cylinder and hydraulic pump can easily cause oil leakage, leading to equipment failure, further increasing the wear and scrap rate of the lead screw, thereby increasing maintenance costs and shortening the service life of the equipment. Utility Model Content

[0005] This utility model provides a steel sleeve pressing device for brake hangers, which solves the problem of cumbersome pressing process for brake hangers in related technologies.

[0006] This utility model embodiment provides a steel sleeve pressing device for a brake hanger, comprising:

[0007] A coaxiality assembly is used to pass through the mounting hole of the brake hanger. The coaxiality assembly includes a detachably connected first connector and a second connector. A first positioning platform is sleeved on the first connector, and a second positioning platform is sleeved on the second connector. The opposite sides of the first positioning platform and the second positioning platform are respectively used for positioning and fitting with the steel sleeve.

[0008] The press-fitting assembly includes a fixed base and a push rod. The coaxiality assembly is detachably mounted on the fixed base, and the push rod passes through the fixed base and abuts against the first positioning table or the second positioning table.

[0009] A driving component is connected to the push rod for transmission. The driving component is adapted to drive the first positioning table or the second positioning table to move axially along the mounting hole of the brake hanger, so as to press the steel sleeve into the mounting hole of the brake hanger.

[0010] According to one embodiment of the present invention, a receiving groove is formed on the fixed seat, and the width of the receiving groove is greater than or equal to the width of the brake hanger.

[0011] According to one embodiment of the present invention, the two opposite sidewalls of the receiving groove are respectively provided with an installation groove and a guide groove, the coaxiality component is detachably installed in the installation groove, and the push rod is movably inserted through the guide groove.

[0012] According to one embodiment of the present invention, the guide groove has a sliding groove formed on its sidewall, and the push rod has a guide block formed on it for slidingly adapting to the sliding groove.

[0013] According to one embodiment of the present invention, the push rod includes:

[0014] A transmission section, which is connected to the driving component in a transmission manner;

[0015] A pusher head is connected to the transmission section, and a guide block is disposed on the pusher head. The pusher head has a through hole for the first connector or the second connector to pass through.

[0016] According to one embodiment of the present invention, a first positioning part is formed in the guide groove, and a second positioning part is formed on the push head. The push head is adapted to achieve positioning cooperation with the guide groove through the positioning cooperation of the first positioning part and the second positioning part.

[0017] According to one embodiment of the present invention, a limiting platform is provided at one end of the transmission section facing the driving member, and an elastic member is sleeved on the transmission section, with the two ends of the elastic member respectively abutting the limiting platform and the push head.

[0018] According to one embodiment of the present invention, a positioning hole is formed on the first connector, and a positioning boss is formed on the second connector. The first connector is adapted to achieve positioning engagement with the second connector through the positioning engagement of the positioning hole and the positioning boss.

[0019] According to one embodiment of the present invention, one of the first connector and the second connector is provided with a connecting block, and the other of the first connector and the second connector is provided with a connecting groove. The first connector is adapted to be installed by the insertion and engagement of the connecting block and the connecting groove.

[0020] According to one embodiment of the present invention, the connecting groove includes:

[0021] A sliding section that extends axially along the first joint or the second joint;

[0022] A locking section, communicating with the sliding section and extending radially along the first or second joint, wherein the connecting block is adapted to slide into the locking section via the sliding section.

[0023] According to the embodiment of this utility model, the steel sleeve pressing device for brake hangers features a coaxiality assembly where the first and second joints are detachably connected and strictly coaxial. Combined with the guiding action of the positioning table and mounting hole, this effectively reduces the coaxiality error during steel sleeve pressing, preventing deformation of the mounting hole or steel sleeve due to eccentricity and ensuring the assembly accuracy and mechanical properties of the brake hanger. The first and second positioning tables abut against both ends of the steel sleeve, achieving axial and radial positioning of the steel sleeve without additional positioning tools. The pressing force is directly transmitted to the positioning table via a push rod, reducing force loss in intermediate steps and improving pressing efficiency compared to traditional manual positioning methods. The detachable design of the coaxiality assembly allows for the replacement of different specifications of the first and second joints and positioning tables to accommodate various sizes of brake hanger mounting holes and steel sleeves, reducing tooling costs. After pressing, the device can be removed simply by disassembling the coaxiality assembly, improving maintenance efficiency. When the high-precision ground end face of the positioning table contacts the steel sleeve, it is subjected to uniform force, avoiding scratches or deformation of the steel sleeve surface caused by local stress concentration in traditional press fitting, and meeting the sealing and wear resistance requirements of the braking system. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in this utility model 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 some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0025] Figure 1 This is a schematic perspective view of the steel sleeve pressing device for brake hanger provided by this utility model.

[0026] Figure 2 This is a schematic perspective view of the fixed base and push rod provided by this utility model.

[0027] Figure 3 This is a schematic perspective view of the fixing base provided by this utility model.

[0028] Figure 4 This is a schematic perspective view of the push rod provided by this utility model.

[0029] Figure 5 This is a schematic perspective view of the coaxiality component provided by this utility model at one angle.

[0030] Figure 6 This is a schematic perspective view of the coaxiality component provided by this utility model from another angle.

[0031] Figure label:

[0032] 10. Steel sleeve; 100. Coaxiality assembly; 102. First connector; 104. Second connector; 106. First positioning platform; 108. Second positioning platform; 110. Press-fit assembly; 112. Fixed base; 114. Push rod; 116. Drive component; 118. Receiving groove; 120. Mounting groove; 122. Guide groove; 124. Slide groove; 126. Guide block; 128. Transmission section; 130. Push head; 132. Through hole; 134. Limiting platform; 136. Elastic component; 138. Connecting block; 140. Connecting groove; 142. Sliding section; 144. Locking section; 146. Positioning hole; 148. Positioning boss. Detailed Implementation

[0033] The embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of this utility model.

[0034] like Figures 1 to 6 As shown, this utility model embodiment provides a steel sleeve 10 press-fitting device for a brake hanger, comprising:

[0035] The coaxiality assembly 100 is used to pass through the mounting hole of the brake hanger. The coaxiality assembly 100 includes a detachably connected first connector 102 and a second connector 104. A first positioning platform 106 is sleeved on the first connector 102, and a second positioning platform 108 is sleeved on the second connector 104. The opposite sides of the first positioning platform 106 and the second positioning platform 108 are respectively used for positioning and fitting with the steel sleeve 10.

[0036] The press assembly 110 includes a fixed base 112 and a push rod 114. The coaxiality assembly 100 is detachably installed on the fixed base 112. The push rod 114 passes through the fixed base 112 and abuts against the first positioning table 106 or the second positioning table 108.

[0037] The drive member 116 is connected to the push rod 114 for transmission. The drive member 116 is adapted to drive the first positioning table 106 or the second positioning table to move axially along the mounting hole of the brake hanger, so as to press the steel sleeve 10 into the mounting hole of the brake hanger.

[0038] According to the embodiment of this utility model, the steel sleeve 10 pressing device for brake hanger provided has a coaxiality component 100 in which the first connector 102 and the second connector 104 are detachably connected and strictly coaxial. Combined with the guiding effect of the positioning table and the mounting hole, the coaxiality error during pressing of the steel sleeve 10 is effectively reduced, avoiding deformation of the mounting hole or the steel sleeve 10 due to eccentricity, thus ensuring the assembly accuracy and mechanical properties of the brake hanger. The first positioning table 106 and the second positioning table 108 respectively abut against both ends of the steel sleeve 10, completing the axial and radial positioning of the steel sleeve 10 without additional positioning tools. The pressing force is directly transmitted to the positioning table through the push rod 114, reducing force loss in intermediate links and improving pressing efficiency compared to traditional manual positioning methods. The detachable design of the coaxiality component 100 allows for the adaptation of various sizes of brake hanger mounting holes and steel sleeves 10 by replacing the first connector 102, the second connector 104, and the positioning table, reducing tooling costs. After pressing, the device can be removed simply by disassembling the coaxiality component 100, improving maintenance efficiency. When the high-precision ground end face of the positioning table contacts the steel sleeve 10, it is subjected to uniform force, avoiding scratches or deformation on the surface of the steel sleeve 10 caused by local stress concentration in traditional press fitting, and meeting the sealing and wear resistance requirements of the braking system.

[0039] Please continue reading Figures 1 to 6 The steel sleeve 10 pressing device provided in this embodiment of the utility model consists of three parts: a coaxiality component 100, a pressing component 110, and a driving component 116. It achieves high-precision pressing of the steel sleeve 10 and the brake hanger mounting hole through precise mechanical cooperation.

[0040] The coaxiality assembly 100 includes a first connector 102 and a second connector 104, which are detachably connected by threads or slots, and together form a coaxial positioning shaft that passes through the mounting hole of the brake hanger. The axes of the first connector 102 and the second connector 104 are strictly coaxial, ensuring that the center line of the steel sleeve 10 is consistent with the axis of the mounting hole during the press-fitting process.

[0041] The first positioning table 106 and the second positioning table 108 are respectively fitted onto the first joint 102 and the second joint 104, and can slide or be fixed along the joint axis. The end face of the positioning table is a high-precision ground plane, which is adapted to the shape of the two end faces of the steel sleeve 10 (such as a plane or a stepped surface), and axial positioning is achieved by pressing against the two ends of the steel sleeve 10. The outer diameter of the first positioning table 106 and the inner diameter of the mounting hole are clearance-fitted to form a guide structure to ensure the coaxiality of the steel sleeve 10 when it is pressed in.

[0042] The fixed base 112 serves as the supporting foundation of the device, and has mounting holes inside that are adapted to the coaxiality component 100. The position of the coaxiality component 100 is fixed by bolts or slots. The side of the fixed base 112 is provided with a guide hole for the push rod 114 to ensure that the push rod 114 moves linearly along the axial direction.

[0043] The push rod 114 passes through the guide hole of the fixed base 112, with its front end abutting against the first positioning table 106 or the second positioning table 108, and its rear end connected to the drive member 116. The axis of the push rod 114 coincides with the axis of the coaxiality assembly 100, ensuring that the pressing force is uniformly transmitted axially.

[0044] The driving component 116 (such as an electric push rod 114) is connected to the push rod 114 via a connecting rod or thread. When the driving component 116 is activated, the push rod 114 pushes the first positioning table 106 or the second positioning table 108 axially, and the positioning table drives the steel sleeve 10 to be slowly pressed into the mounting hole. During the pressing process, the first joint 102 and the second joint 104 of the coaxiality assembly 100 act as rigid supports, limiting the radial displacement of the steel sleeve 10 and ensuring pressing accuracy. After pressing is completed, the coaxiality assembly 100 can be disassembled and the device can be removed.

[0045] According to one embodiment of the present invention, a receiving groove 118 is formed on the fixed base 112, and the width of the receiving groove 118 is greater than or equal to the width of the brake hanger.

[0046] In one embodiment of this utility model, the upper surface of the fixing base 112 is recessed to form a receiving groove 118. The length and depth of the receiving groove 118 are designed according to the external dimensions of the brake hanger, and its width is precisely matched to the width of the brake hanger (error ≤ 0.5mm). The bottom surface of the receiving groove 118 is flat, and the two side walls are perpendicular to the bottom surface, ensuring that after the brake hanger is placed, its two side sides fit against the side walls of the receiving groove 118, and its bottom surface abuts against the bottom of the receiving groove 118, forming a stable positioning support.

[0047] The width of the receiving groove 118 is the same as the width of the brake hanger, which allows for rapid positioning of the brake hanger through mechanical cooperation, preventing lateral displacement of the hanger during press-fitting and ensuring that the press-fitting axis of the steel sleeve 10 coincides with the axis of the mounting hole, thus improving press-fitting accuracy. By designing receiving grooves 118 of different widths or detachable groove walls, this device can be adapted to various specifications of brake hangers, meeting the press-fitting requirements of different vehicle models without replacing the fixed seat 112, thereby reducing tooling costs.

[0048] According to one embodiment of the present invention, the two opposite sidewalls of the receiving groove 118 are respectively provided with an installation groove 120 and a guide groove 122, the coaxiality component 100 is detachably installed in the installation groove 120, and the push rod 114 is movably inserted through the guide groove 122.

[0049] In one embodiment of this utility model, a mounting groove 120 is formed on the left side wall of the receiving groove 118, and a guide groove 122 is formed on the right side wall. The depth of the mounting groove 120 is adapted to the length of the first connector 102 or the second connector 104 of the coaxiality assembly 100. The axis of the guide groove 122 is coaxial with the axis of the mounting groove 120, ensuring that the push rod 114 slides smoothly along the axial direction.

[0050] The symmetrical arrangement of the mounting groove 120 and the guide groove 122 forms a modular mounting frame. The coaxiality component 100 and the push rod 114 are respectively installed in the grooves on both sides, which facilitates disassembly and maintenance. Moreover, the installation error of each component can be adjusted independently, improving the assembly accuracy of the device. The push rod 114 passes through the guide groove 122 and is coaxial with the coaxiality component 100. The pressing force is directly transmitted to the coaxiality component 100 through the linear guidance of the guide groove 122, reducing the off-center load phenomenon in the force transmission process, making the steel sleeve 10 uniformly stressed and avoiding deformation.

[0051] According to one embodiment of the present invention, a sliding groove 124 is formed on the side wall of the guide groove 122, and a guide block 126 is formed on the push rod 114 for sliding adaptation with the sliding groove 124.

[0052] In one embodiment of this utility model, axially extending sliding grooves 124 are respectively formed on the left and right side walls of the guide groove 122. The sliding grooves 124 have a T-shaped or dovetail-shaped structure. Guide blocks 126 are correspondingly provided on both sides of the push rod 114. The cross-sectional shape of the guide blocks 126 matches the sliding groove 124, allowing them to slide freely within the sliding groove 124. The guide blocks 126 are made of wear-resistant materials (such as copper alloys) and their surfaces are hardened to reduce the coefficient of sliding friction.

[0053] The cooperation between the guide block 126 and the slide groove 124 converts the axial movement of the push rod 114 into sliding friction. With the help of lubricating grease, the coefficient of friction can be reduced to below 0.1, ensuring smooth operation of the push rod 114, reducing the load on the drive component 116, and extending the service life of the equipment. The symmetrical cooperation between the guide blocks 126 and the slide groove 124 on both sides effectively limits the radial swing of the push rod 114. Even if there is a slight eccentricity in the pressing force, the axial movement of the push rod 114 can be maintained by the constraint of the guide blocks 126 and the slide groove 124, improving the stability of the pressing process.

[0054] According to one embodiment of the present invention, the push rod 114 includes:

[0055] Transmission section 128 is connected to drive component 116 in a transmission manner;

[0056] The push head 130 is connected to the transmission section 128, and the guide block 126 is disposed on the push head 130. The push head 130 has a through hole 132 for the first connector 102 or the second connector 104 to pass through.

[0057] In one embodiment of this utility model, the push rod 114 adopts a split structure, consisting of a transmission section 128 and a push head 130, which are fixed by threaded connection or pins. The transmission section 128 is a cylindrical rod with external threads or connecting lugs machined at its end, and is rigidly connected to the output shaft of the drive component 116 (such as the electric push rod 114). The push head 130 has a disc-shaped structure with a through hole 132 in the center. The diameter of the through hole 132 is 1-2 mm larger than the diameter of the joint of the coaxiality assembly 100, ensuring that the joint can pass through freely. Guide blocks 126 are respectively provided on both sides of the push head 130, and the guide blocks 126 slide in engagement with the sliding grooves 124 of the guide groove 122.

[0058] The through-hole 132 of the pusher head 130 is designed to allow either the first connector 102 or the second connector 104 to pass through, enabling press-fitting operations for different connectors without replacing the push rod 114, thus improving the versatility of the device. The disc-shaped structure of the pusher head 130 increases the contact area with the first positioning table 106 or the second positioning table 108, ensuring that the press-fitting force is evenly distributed on the end face of the positioning table, avoiding deformation of the positioning table or damage to the steel sleeve 10 caused by localized stress concentration.

[0059] According to one embodiment of the present invention, a first positioning part is formed in the guide groove 122, and a second positioning part is formed on the push head 130. The push head 130 is adapted to achieve positioning cooperation with the guide groove 122 through the positioning cooperation of the first positioning part and the second positioning part.

[0060] In one embodiment of this utility model, a first positioning part (such as a positioning pin or positioning block) is provided at the bottom of the guide groove 122, and a second positioning part (such as a positioning hole 146 or positioning groove) adapted to the first positioning part is provided on the bottom surface of the push head 130. When the push rod 114 is installed in the guide groove 122, the first positioning part is embedded in the second positioning part to form a mechanical positioning structure, ensuring that the axis of the through hole 132 of the push head 130 is coaxial with the axis of the coaxiality component 100.

[0061] The positioning unit enables rapid installation and alignment of the push rod 114. Operators can ensure that the axis of the push rod 114 coincides with the axis of the coaxiality component 100 without the need for measuring tools, reducing installation and debugging time and improving work efficiency. The unique matching of the positioning unit prevents the push rod 114 from being misaligned or misplaced during installation, avoiding pressing failure due to installation errors and improving the reliability and safety of operation.

[0062] According to one embodiment of the present invention, a limiting platform 134 is provided at one end of the transmission section 128 facing the driving member 116, and an elastic member 136 is sleeved on the transmission section 128. The two ends of the elastic member 136 abut against the limiting platform 134 and the push head 130, respectively.

[0063] In one embodiment of this utility model, an annular limiting platform 134 is machined at the end of the transmission segment 128 near the driving member 116. The diameter of the limiting platform 134 is larger than the diameter of the transmission segment 128. An elastic member 136 (such as a compression spring) is sleeved on the transmission segment 128, with one end abutting against the end face of the limiting platform 134 and the other end abutting against the back of the push head 130. The free length of the elastic member 136 is greater than the initial distance between the transmission segment 128 and the push head 130, ensuring that the push head 130 remains in contact with the positioning platform in its natural state.

[0064] When the drive component 116 pushes the transmission section 128, the elastic component 136 absorbs the impact load during the pressing process, preventing damage to the steel sleeve 10 or the positioning table caused by excessive instantaneous pressure. It also reduces equipment operating noise and improves operational safety. The preload of the elastic component 136 compensates for the assembly gap between the transmission section 128 and the pusher head 130, ensuring real-time transmission of pressing force. Even if components are worn, the compression deformation of the elastic component 136 maintains tight contact between the pusher head 130 and the positioning table, guaranteeing pressing accuracy.

[0065] According to one embodiment of the present invention, a positioning hole 146 is formed on the first connector 102, and a positioning boss 148 is formed on the second connector 104. The first connector 102 is adapted to achieve positioning engagement with the second connector 104 through the positioning engagement of the positioning hole 146 and the positioning boss 148.

[0066] In one embodiment of this utility model, a positioning hole 146 is formed at the center of the end face of the first connector 102. The positioning hole 146 is a blind hole or a through hole with smooth walls. A positioning boss 148 is provided at the center of the end face of the second connector 104. The positioning boss 148 is cylindrical, and its diameter is in clearance fit with the inner diameter of the positioning hole 146 (clearance ≤ 0.03 mm), and its height is slightly less than the depth of the positioning hole 146. When the first connector 102 and the second connector 104 are connected, the positioning boss 148 is inserted into the positioning hole 146, forming precise axial and radial positioning.

[0067] The fit tolerance between the positioning hole 146 and the positioning boss 148 is controlled within 0.05mm, ensuring that the coaxiality error between the first connector 102 and the second connector 104 is ≤0.02mm. This provides a high-precision positioning reference for the press-fitting of the steel sleeve 10, preventing eccentric press-fitting of the steel sleeve 10 due to misalignment of the connectors. The insertion fit between the positioning boss 148 and the positioning hole 146 enables rapid assembly of the connectors without the need for additional positioning tools or measurement steps. Operators only need to insert the boss into the hole to complete the initial positioning, improving the assembly efficiency of the device.

[0068] According to one embodiment of the present invention, one of the first connector 102 and the second connector 104 is provided with a connecting block 138, and the other of the first connector 102 and the second connector 104 is provided with a connecting groove 140. The first connector 102 is adapted to be installed by the insertion and engagement of the connecting block 138 and the connecting groove 140.

[0069] In one embodiment of this utility model, a connecting block 138 is provided on the outer peripheral surface of the first connector 102. The connecting block 138 is a rectangular block that extends along the axial direction of the connector. A connecting groove 140 is formed on the outer peripheral surface of the second connector 104. The shape of the connecting groove 140 matches that of the connecting block 138 and includes a sliding section 142 extending axially and a locking section 144 extending radially. During installation, the connecting block 138 is aligned with the sliding section 142 and inserted. Then, the first connector 102 is rotated to allow the connecting block 138 to slide into the locking section 144, forming a circumferential locking structure.

[0070] The insertion and engagement of the connecting block 138 with the connecting groove 140, combined with the positioning hole 146 and the positioning boss 148, forms a double locking mechanism in both the axial and circumferential directions. This effectively prevents the joint from loosening or rotating during the press-fitting process, ensuring the rigid connection of the coaxiality assembly 100 and improving the stability of the press-fitting process. By rotating the first joint 102 to slide the connecting block 138 out of the locking section 144, the joint can be quickly disassembled. Compared with traditional threaded connections, the disassembly time is shortened, facilitating equipment maintenance and specification changes.

[0071] According to one embodiment of the present invention, the connecting groove 140 includes:

[0072] Slide section 142 extends axially along the first joint 102 or the second joint 104;

[0073] Locking section 144 communicates with sliding section 142 and extends radially along first connector 102 or second connector 104, connecting block 138 is adapted to slide into locking section 144 via sliding section 142.

[0074] In one embodiment of this utility model, the connecting groove 140 adopts an "L"-shaped structure, consisting of an axial sliding section 142 and a radial locking section 144. The length of the sliding section 142 is greater than the length of the connecting block 138, ensuring that the connecting block 138 can be fully inserted. The depth of the locking section 144 is greater than the width of the connecting block 138. After the connecting block 138 slides into the locking section 144, the first connector 102 is rotated, and the side of the connecting block 138 abuts against the groove wall of the locking section 144, forming a circumferential limit. The corners of the connecting groove 140 are provided with rounded transitions to avoid stress concentration.

[0075] The contact between the locking section 144 and the connecting block 138 can withstand a large circumferential torque. Even under the reaction force of the pressing force, it can prevent relative rotation between the first connector 102 and the second connector 104, ensuring the stability of the coaxiality assembly 100 and avoiding deviation in the pressing angle of the steel sleeve 10 due to connector rotation. After the connecting block 138 slides into the locking section 144, the operator can visually confirm the installation status of the connector by observing the relative position of the connecting block 138 and the locking section 144, reducing the risk of misoperation and improving the reliability and safety of operation.

[0076] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A steel sleeve press fitting device for a brake hanger, characterized in that, include: A coaxiality assembly (100) is used to pass through the mounting hole of the brake hanger. The coaxiality assembly (100) includes a first joint (102) and a second joint (104) that are detachably connected. A first positioning platform (106) is sleeved on the first joint (102), and a second positioning platform (108) is sleeved on the second joint (104). The opposite sides of the first positioning platform (106) and the second positioning platform (108) are respectively used for positioning and fitting with the steel sleeve. The press assembly (110) includes a fixed base (112) and a push rod (114). The coaxiality assembly (100) is detachably mounted on the fixed base (112). The push rod (114) passes through the fixed base (112) and abuts against the first positioning table (106) or the second positioning table (108). The driving member (116) is connected to the push rod (114) in a transmission manner. The driving member (116) is adapted to drive the first positioning platform (106) or the second positioning platform to move axially along the mounting hole of the brake hanger so as to press the steel sleeve into the mounting hole of the brake hanger.

2. The steel bush press fitting device for brake hanger seat according to claim 1, characterized in that, The fixed seat (112) has a receiving groove (118) formed thereon, the width of which is greater than or equal to the width of the brake seat.

3. The steel bush press fitting device for braking a hanger seat according to claim 2, characterized by, The two opposite sidewalls of the receiving groove (118) are respectively provided with an installation groove (120) and a guide groove (122). The coaxiality component (100) is detachably installed in the installation groove (120), and the push rod (114) is movably inserted through the guide groove (122).

4. The steel bush press fitting device for braking a hanger seat according to claim 3, characterized by, The guide groove (122) has a sliding groove (124) formed on its sidewall, and the push rod (114) has a guide block (126) for sliding adaptation with the sliding groove (124).

5. The steel bush press fitting device for braking a hanger seat according to claim 4, characterized by, The push rod (114) includes: The transmission section (128) is connected to the driving member (116) in a transmission manner; A pusher (130) is connected to the transmission section (128), and a guide block (126) is disposed on the pusher (130). The pusher (130) has a through hole (132) for the first connector (102) or the second connector (104) to pass through.

6. The steel bush press fitting device for braking a hanger seat according to claim 5, characterized by, A first positioning part is formed in the guide groove (122), and a second positioning part is formed on the push head (130). The push head (130) is adapted to achieve positioning cooperation with the guide groove (122) through the positioning cooperation of the first positioning part and the second positioning part.

7. The steel sleeve pressing device for a brake hanger according to claim 5, characterized in that, The transmission section (128) is provided with a limiting platform (134) at one end facing the driving member (116), and an elastic member (136) is sleeved on the transmission section (128). The two ends of the elastic member (136) abut against the limiting platform (134) and the push head (130) respectively.

8. The steel bush press fitting device for braking a suspension seat according to any one of claims 1 to 7, characterized in that, The first connector (102) has a positioning hole (146) and the second connector (104) has a positioning boss (148). The first connector (102) is adapted to achieve positioning engagement with the second connector (104) through the positioning engagement of the positioning hole (146) and the positioning boss (148).

9. The steel bush press fitting device for braking a hanger seat according to claim 8, characterized in that, One of the first connector (102) and the second connector (104) has a connecting block (138), and the other of the first connector (102) and the second connector (104) has a connecting groove (140). The first connector (102) is adapted to be installed by the insertion and engagement of the connecting block (138) and the connecting groove (140).

10. The steel bush press fitting device for braking a hanger seat according to claim 9, characterized in that, The connecting groove (140) includes: A sliding section (142) extends axially along the first connector (102) or the second connector (104); A locking section (144) communicates with the sliding section (142) and the locking section (144) extends radially along the first connector (102) or the second connector (104), and the connecting block (138) is adapted to slide into the locking section (144) via the sliding section (142).

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