Clamping tool for press fitting of a reducer bushing

Abstract

The utility model relates to the technical field of automobile assembly, specifically relates to a kind of clamping tool for speed reducer bushing press fitting, including the base for supporting speed reducer, base is provided with moving assembly and is used for clamping the turnover position changing mechanism of speed reducer, turnover position changing mechanism is installed on base by moving assembly;Moving assembly includes linear guide pair and mobile sliding table, moving assembly is configured to utilize the sliding of mobile sliding table on linear guide pair, drive turnover position changing mechanism to form position adjustment in the support plane of base;Turnover position changing mechanism includes support and rotating support;Turnover position changing mechanism is configured to utilize the rotation of rotating support relative to support, drive the speed reducer fixed in clamping space by positioning clamping assembly to overturn, the installation hole axis of the bushing to be press fitted on speed reducer is adjusted to the position of coinciding with the press fitting axis of external press fitting equipment, the uniformity of keeping positioning reference is passed through, improve the press fitting quality and assembly efficiency of speed reducer bushing.

Description

Technical Field

[0001] This utility model relates to the field of automotive assembly technology, specifically to a clamping fixture for press-fitting reducer bushings. Background Technology

[0002] The bushings of a speed reducer are typically composite components made of rubber and metal, and are installed onto the speed reducer housing using a press-fit process to improve the physical characteristics during power transmission. For example, the bushings of a car's rear speed reducer mount the speed reducer housing onto the subframe or chassis to isolate vibrations generated during gear meshing inside the rear speed reducer.

[0003] Currently, during the press-fitting process of reducer bushings, because the press-fitting direction is opposite to the assembly reference surface of the previous process, it is usually necessary to manually or through a flipping mechanism rotate the reducer 180 degrees along the horizontal axis so that the bushing mounting hole axis is below the press head. Since the reducer flipping process is independent of subsequent transfer and positioning processes, once the reducer is removed from the control of the flipping mechanism, its spatial coordinates change. When it subsequently enters the press-fitting station, the press-fitting fixture must find a new positioning reference for secondary positioning. Furthermore, the combined effect of the repeatability error of the flipping mechanism, the positional offset during transitional transfer, and the re-clamping error of the press-fitting fixture makes it difficult to guarantee the final alignment accuracy of the bushing press-fitting, resulting in bushing eccentricity and affecting the assembly quality of the bushing. Summary of the Invention

[0004] The purpose of this utility model is to provide a clamping fixture for the assembly process of reducer bushings, so as to solve the problem that the reducer needs to be repositioned after flipping due to the change in spatial coordinates, resulting in large cumulative errors and low bushing pressing and alignment accuracy. The aim is to improve the pressing quality and assembly efficiency of reducer bushings by maintaining the uniformity of the positioning reference.

[0005] To achieve the above objectives, this utility model proposes a clamping fixture for press-fitting a reducer bushing, including a base for supporting the reducer, a movable component and a flipping and shifting mechanism for clamping the reducer on the base, the flipping and shifting mechanism being mounted on the base via the movable component; The moving component includes a linear guide rail pair and a moving slide. The moving slide is slidably connected to the linear guide rail pair. The moving component is configured to use the sliding of the moving slide on the linear guide rail pair to drive the tilting and repositioning mechanism to adjust its position within the support plane of the base. The flipping and repositioning mechanism includes a support and a rotating bracket. The rotating bracket is connected to the moving component through the support. The rotating bracket is rotatably mounted on the upper part of the support through a rotating shaft. The rotating bracket extends to one side of the support to form a clamping space for accommodating the reducer. A positioning and clamping component is provided in the clamping space. The flipping and repositioning mechanism is configured to use the rotation of the rotating bracket relative to the support to drive the reducer, which is fixed in the clamping space by the positioning and clamping assembly, to flip and adjust the mounting hole axis of the bushing to be pressed on the reducer to coincide with the pressing axis of the external pressing equipment.

[0006] Preferably, the moving assembly also includes a locking structure, which includes a screw and a locking block. The locking block is disposed on the base, and the screw is mounted on the moving slide via a connector. The locking structure is configured to lock the position of the moving slide by tightening the screw so that the end of the screw is pressed against the locking block.

[0007] Preferably, the base is mounted on the transfer equipment.

[0008] Preferably, the positioning and clamping assembly includes a first positioning plate, a second positioning plate, and a clamping mechanism disposed on the rotating bracket. The first positioning plate is disposed at the bottom of the clamping space to provide a positioning reference for the bottom surface of the reducer. The second positioning plate is disposed on the side of the clamping space to provide a positioning reference for the side end face of the reducer. The clamping mechanism is configured to clamp the reducer by applying a locking force to the reducer so that the side end face of the reducer is tightly attached to the second positioning plate.

[0009] Preferably, the end of the shaft is provided with a handwheel for adjusting the rotation angle of the shaft.

[0010] Preferably, a rotary locking structure is provided on one side of the rotating bracket. The rotary locking structure includes a positioning hole, a positioning post, and a pressing mechanism. The positioning hole is arranged on the rotating bracket, and the positioning post is installed on the support through the pressing mechanism. The rotary locking structure is configured to drive the positioning post through the pressing mechanism to insert or disengage from the positioning hole, thereby switching between the locked and released states of the rotating bracket.

[0011] Preferably, the movable component includes a first guide rail and a second guide rail, which are arranged perpendicularly to each other. The first guide rail is mounted on the base, the movable slide is slidably connected to the first guide rail, the second guide rail is mounted on the movable slide, and the bottom of the support is slidably connected to the second guide rail.

[0012] Preferably, the axis of the rotating shaft is arranged parallel to the first guide rail.

[0013] Compared with the prior art, the clamping fixture for press-fitting reducer bushings provided by this utility model has the following substantial features and advancements: This clamping fixture achieves precise positioning of the reducer in a plane through the cooperation of the base and the moving component, and adjusts the spatial posture of the reducer through a flipping and repositioning mechanism. The positioning and clamping component performs a one-time positioning and clamping of the reducer within the clamping space. Throughout the press-fitting process, the reducer remains within the clamping fixture, avoiding the loss of reference due to disengagement from the flipping mechanism. The rotating bracket performs a flipping motion on the support via a rotating shaft, flipping the reducer from the initial clamping position to the press-fitting position, aligning the bushing mounting hole axis with the press-fitting axis, preventing offset during press-fitting, and ensuring a constant position of the reducer during flipping and movement. This clamping fixture integrates flipping, positioning, and clamping functions, eliminating the cumulative error caused by multiple positioning operations, and significantly improving the alignment accuracy and assembly quality of the bushing press-fitting. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of a clamping fixture for press-fitting a reducer bushing according to an embodiment of the present invention.

[0015] Figure 2 This is a schematic diagram of the assembly structure of a clamping fixture and transfer mechanism for press-fitting a reducer bushing, according to an embodiment of this utility model.

[0016] Figure 3 This is a schematic diagram of the adjustment of a clamping fixture for press-fitting a reducer bushing according to an embodiment of the present invention.

[0017] Figure 4 This is a reference diagram showing the usage state of a clamping fixture and press for press-fitting a reducer bushing, as described in an embodiment of this utility model.

[0018] Reference numerals: 1. Base; 2. Moving component; 3. Tilting and shifting mechanism; 4. Reducer; 5. Mounting hole; 6. Transfer equipment; 7. Pressing equipment; 21. Linear guide pair; 22. Moving slide; 23. Locking structure; 31. Support; 32. Rotating bracket; 33. Positioning and clamping assembly; 34. Rotating shaft; 35. Handwheel; 36. Rotary locking structure; 231. Screw; 232. Locking block; 331. First positioning plate; 332. Second positioning plate; 333. Pressing mechanism; 361. Positioning hole; 362. Positioning post; 363. Pressing mechanism. Detailed Implementation

[0019] The specific embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0020] like Figure 1 and Figure 2As shown, a clamping fixture for press-fitting bushings of a reducer 4 includes a base 1 for supporting the reducer 4, a moving component 2 and a flipping and shifting mechanism 3 for clamping the reducer 4 are provided on the base 1, and the flipping and shifting mechanism 3 is mounted on the base 1 through the moving component 2.

[0021] like Figure 1 As shown, the moving component 2 includes a linear guide rail pair 21 and a moving slide 22. The moving slide 22 is slidably connected to the linear guide rail pair 21. The moving component 2 is configured to use the sliding of the moving slide 22 on the linear guide rail pair 21 to drive the tilting and positioning mechanism 3 to adjust its position within the support plane of the base 1.

[0022] like Figure 1 and Figure 2 As shown, the flipping and repositioning mechanism 3 includes a support 31 and a rotating bracket 32. The rotating bracket 32 ​​is connected to the moving component 2 via the support 31. The rotating bracket 32 ​​is rotatably mounted on the upper part of the support 31 via a rotating shaft 34. The rotating bracket 32 ​​extends to one side of the support 31 to form a clamping space for accommodating the reducer 4, and a positioning and clamping component 33 is provided in the clamping space.

[0023] The flipping and repositioning mechanism 3 is configured to use the rotation of the rotating bracket 32 ​​relative to the support 31 to drive the reducer 4, which is fixed in the clamping space by the positioning clamping assembly 33, to flip and adjust the axis of the mounting hole 5 of the bushing to be pressed on the reducer 4 to coincide with the pressing axis of the external pressing equipment 7.

[0024] Specifically, such as Figure 1 and Figure 2 As shown, the base 1 is a rectangular thick plate structure, and its upper surface is precision milled to form a highly flat mounting base.

[0025] The base 1 has multiple pre-drilled mounting holes at its four corners or along its edges. These mounting holes allow M12 or M16 bolts to pass through, securely mounting the base 1 to the support platform of the external transfer equipment 6. The transfer equipment 6 can be an automated guided vehicle, a roller conveyor, a fixed workbench, or a hydraulically operated trolley.

[0026] The movable component 2 is mounted on the upper surface of the base 1 and is used to adjust the position of the tilting and repositioning mechanism 3 in the horizontal plane. Figure 3 As shown, the moving component 2 includes a linear guide pair 21, a sliding table 22, and a locking structure 23. The linear guide pair 21 is a precision linear motion mechanism, typically composed of a guide body and a slider. The moving component 2 is configured to have the ability to move in the XY two-dimensional plane.

[0027] For example, the movable component 2 includes a first guide rail and a second guide rail. The first guide rail is arranged along a main direction (e.g., the X-axis direction) of the base 1 and is securely mounted to the upper surface of the base 1 using high-strength bolts passing through countersunk holes at its bottom. The movable slide 22 is constructed as a flat rectangular platform with multiple sliders mounted on its bottom that mate with the first guide rail, allowing the movable slide 22 to slide smoothly and with low friction along its length (X-axis direction) on the first guide rail.

[0028] The second guide rail is arranged in a direction perpendicular to the first guide rail (e.g., the Y-axis direction) and is securely mounted to the upper surface of the movable slide table 22 using bolts. Multiple sliders that cooperate with the second guide rail are installed at the bottom of the support 31, allowing the support 31 to slide along the length direction (Y-axis direction) of the second guide rail. Through this vertical arrangement of the two-stage guide rails, the movable component 2 achieves precise positioning and adjustment in any direction within the support plane of the base 1, thereby enabling the tilting and repositioning mechanism 3 to be moved to a preset XY plane position.

[0029] like Figure 3 As shown, the locking structure 23 is used to lock the position of the movable slide 22 after it has been adjusted to a preset position, preventing accidental movement during the pressing process. The locking structure 23 includes a screw 231 and a locking block 232. The screw 231 is typically a locking bolt with a handle or wrench drive head, which is mounted on the side of the movable slide 22 via a connector. The connector is typically a threaded seat, integrally formed with the movable slide 22 or fixed by bolts.

[0030] The thread direction of screw 231 is perpendicular to the moving direction of the movable slide 22. When it is necessary to lock the position of the movable slide 22, screw 231 is manually tightened so that the end of screw 231 abuts against the ground surface of locking block 232. The movable slide 22 is firmly fixed to the base 1 by friction, thereby achieving precise position locking of the movable component 2. The end of screw 231 usually has a flat surface or rubber pad to increase friction and protect the surface of locking block 232.

[0031] like Figure 2 As shown, the tilting and repositioning mechanism 3 includes a support 31, a rotating bracket 32, a rotating shaft 34, a handwheel 35, and a rotating locking structure 36. The main structure of the support 31 is a box-type or column-type structure, and its upper part has two symmetrical bearing seats for mounting the rotating shaft 34.

[0032] The rotating bracket 32 ​​is used to directly support and tilt the reducer 4. For example... Figure 2 As shown, the rotating bracket 32 ​​is constructed as a C-shaped or U-shaped frame structure, extending to one side of the support 31 to form an internal clamping space. The rotating bracket 32 ​​is rotatably mounted on the bearing seat of the support 31 via a rotating shaft 34. Figure 3As shown, the axis of the rotating shaft 34 is arranged parallel to the first guide rail of the moving component 2, ensuring that the axis of its mounting hole 5 rotates in the XZ plane when the reducer 4 is flipped.

[0033] The handwheel 35 is fixed to the end of the rotating shaft 34. The handwheel 35 is usually a circular disc with anti-slip texture, which is easy for the operator to turn by hand. By turning the handwheel 35, the rotation angle of the rotating shaft 34 can be manually adjusted, which in turn drives the rotating bracket 32 ​​to flip, thereby flipping the reducer 4 fixed inside it from the initial clamping position to the pressing position, so that the axis of the mounting hole 5 of the bushing to be pressed on the reducer 4 coincides with the pressing axis of the external pressing equipment 7.

[0034] The rotary locking structure 36 is used to lock the position of the rotating bracket 32 ​​after it has been rotated to the target angle, preventing accidental rotation during the pressing process. Figure 3 As shown, the rotary locking structure 36 includes a positioning hole 361, a positioning post 362, and a pressing mechanism 363.

[0035] The pressing mechanism 363 is mounted on the support 31. Its function is to drive the positioning pin 362 to make linear motion perpendicular to the axis of the rotating shaft 34, so that it can be inserted into or disengaged from the positioning hole 361. The pressing mechanism 363 can be a pneumatic cylinder, a manual screw mechanism, or a spring return handle structure.

[0036] When the pressing mechanism 363 drives the positioning pin 362 to insert into the corresponding positioning hole 361, the rotation angle of the rotating bracket 32 ​​is precisely locked; when the pressing mechanism 363 drives the positioning pin 362 to disengage from the positioning hole 361, the rotation state of the rotating bracket 32 ​​is released, allowing it to rotate freely. This locking mechanism ensures the attitude stability of the reducer 4 during the pressing process.

[0037] like Figure 2 As shown, the positioning and clamping assembly 33 is disposed within the clamping space of the rotating bracket 32 ​​and is used to precisely position and securely clamp the reducer 4. The positioning and clamping assembly 33 includes a first positioning plate 331, a second positioning plate 332, and a clamping mechanism 333.

[0038] The first positioning plate 331 is fixedly installed at the bottom of the clamping space of the rotating bracket 32 ​​by high-strength bolts. The dimensions of the first positioning plate 331 are configured to match the bottom area of ​​the reducer 4 to be clamped, so as to provide sufficient support area. The first positioning plate 331 provides a precise two-dimensional positioning reference in the Z-axis direction and in the XY plane for the bottom surface of the reducer 4.

[0039] The second positioning plate 332 is an L-shaped plate or two vertically arranged flat plates, perpendicular to the first positioning plate 331. The second positioning plate 332 is fixed to the side of the clamping space of the rotating bracket 32 ​​by high-strength bolts. The two mutually perpendicular positioning surfaces of the second positioning plate 332 provide two additional precise positioning references for the side end face of the reducer 4, thereby achieving bidirectional positioning of the reducer 4 in the XY plane. The first positioning plate 331 and the second positioning plate 332 together form a three-dimensional L-shaped positioning reference, ensuring that the initial position of the reducer 4 in the clamping space has extremely high repeatability.

[0040] The clamping mechanism 333 is installed in the clamping space of the rotating bracket 32, and its position is opposite to the second positioning plate 332. The clamping mechanism 333 can be a pneumatic clamping device, a hydraulic clamping device, or a manual screw clamp. In a specific embodiment, the clamping mechanism 333 typically employs one or more pneumatic clamping cylinders, the end of which has a rotatable pressure head to adapt to the surface shape of the reducer 4.

[0041] The cylinder body of the pneumatic clamping cylinder is fixed to the inner wall of the rotating bracket 32 ​​by bolts. When compressed air is introduced into the pneumatic clamping cylinder, the piston rod extends, and the pressure head moves towards the reducer 4, applying a constant locking force to the other side of the reducer 4. This locking force causes the side end face of the reducer 4 to fit tightly against the second positioning plate 332, thereby firmly clamping the reducer 4 within the positioning reference formed by the first positioning plate 331 and the second positioning plate 332, preventing any displacement or vibration of the reducer 4 during movement or rotation.

[0042] The clamping force provided by the clamping mechanism 333 is adjustable to adapt to the clamping requirements of different models of reducers 4, while avoiding damage to the reducer 4 itself.

[0043] like Figure 3 and Figure 4 As shown, in practical applications, the clamping fixture of this utility model for press-fitting reducer bushings achieves precise positioning of the reducer 4 in a horizontal plane through the cooperation of the base 1 and the moving component 2. During operation, the reducer 4 is first placed in the clamping space of the rotating bracket 32, with its bottom tightly against the first positioning plate 331 and its sides tightly against the second positioning plate 332. Then, the clamping mechanism 333 is activated to apply a locking force to the reducer 4, firmly clamping it within the three-dimensional positioning reference formed by the positioning and clamping component 33.

[0044] By rotating the handwheel 35, the rotating shaft 34 is driven to rotate, thereby causing the rotating bracket 32 ​​and the reducer 4 clamped on it to flip. The adjustment of the flip angle ensures that the axis of the mounting hole 5 of the bushing to be pressed on the reducer 4 can be precisely aligned with the pressing axis of the external pressing equipment 7. When the required flip angle is reached, the pressing mechanism 363 of the rotating locking structure 36 is driven, causing the positioning pin 362 to engage with the corresponding positioning hole 361 on the rotating bracket 32, firmly locking the rotation angle of the rotating bracket 32 ​​and preventing any angular deviation during the pressing process.

[0045] By operating the moving component 2, that is, by the coordinated sliding of the first guide rail and the second guide rail, the tilting and positioning mechanism 3 carrying the reducer 4 is moved as a whole to a preset position below the external pressing equipment 7. Once the target position is reached, the moving slide 22 is firmly locked onto the base 1 by turning the screws 231 of the locking structure 23, ensuring that no horizontal displacement occurs during the pressing process.

[0046] Throughout the press-fitting process, the reducer 4 is firmly clamped within the clamping fixture, avoiding the cumbersome steps of removing the reducer 4 from the fixture, flipping it, and then repositioning it, as required by existing technologies, and the resulting loss of reference and cumulative errors. The clamping fixture for press-fitting reducer bushings proposed in this invention integrates flipping, positioning, and clamping functions, significantly improving the alignment accuracy and assembly quality of the bushing press-fitting.

[0047] This utility model is not limited to the specific technical solutions described in the above embodiments. Besides the above embodiments, this utility model may have other implementation methods. For those skilled in the art, any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A clamping fixture for press-fitting reducer bushings, comprising a base for supporting the reducer, characterized in that, The base is provided with a movable component and a tilting and positioning mechanism for clamping the reducer, and the tilting and positioning mechanism is mounted on the base via the movable component. The moving component includes a linear guide rail pair and a moving slide. The moving slide is slidably connected to the linear guide rail pair. The moving component is configured to use the sliding of the moving slide on the linear guide rail pair to drive the tilting and repositioning mechanism to adjust its position within the support plane of the base. The flipping and repositioning mechanism includes a support and a rotating bracket. The rotating bracket is connected to the moving component through the support. The rotating bracket is rotatably mounted on the upper part of the support through a rotating shaft. The rotating bracket extends to one side of the support to form a clamping space for accommodating the reducer. A positioning and clamping component is provided in the clamping space. The flipping and repositioning mechanism is configured to use the rotation of the rotating bracket relative to the support to drive the reducer, which is fixed in the clamping space by the positioning and clamping assembly, to flip and adjust the mounting hole axis of the bushing to be pressed on the reducer to coincide with the pressing axis of the external pressing equipment.

2. The clamping fixture for press-fitting reducer bushings according to claim 1, characterized in that, The moving assembly also includes a locking structure comprising a screw and a locking block. The locking block is disposed on the base, and the screw is mounted on the moving slide via a connector. The locking structure is configured to lock the position of the moving slide by tightening the screw so that the end of the screw is pressed against the locking block.

3. The clamping fixture for press-fitting reducer bushings according to claim 1, characterized in that, The base is mounted on the transfer equipment.

4. The clamping fixture for press-fitting reducer bushings according to claim 1, characterized in that, The positioning and clamping assembly includes a first positioning plate, a second positioning plate, and a clamping mechanism disposed on a rotating bracket. The first positioning plate is disposed at the bottom of the clamping space to provide a positioning reference for the bottom surface of the reducer. The second positioning plate is disposed on the side of the clamping space to provide a positioning reference for the side end face of the reducer. The clamping mechanism is configured to clamp the reducer by applying a locking force to the reducer, so that the side end face of the reducer is tightly attached to the second positioning plate.

5. The clamping fixture for press-fitting reducer bushings according to claim 1, characterized in that, The end of the shaft is provided with a handwheel for adjusting the rotation angle of the shaft.

6. The clamping fixture for press-fitting reducer bushings according to claim 1, characterized in that, A rotary locking structure is provided on one side of the rotating bracket. The rotary locking structure includes a positioning hole, a positioning post, and a pressing mechanism. The positioning hole is arranged on the rotating bracket, and the positioning post is installed on the support through the pressing mechanism. The rotary locking structure is configured to drive the positioning post through the pressing mechanism to insert or disengage from the positioning hole, thereby switching between the locked and released states of the rotating bracket.

7. The clamping fixture for press-fitting reducer bushings according to claim 1, characterized in that, The movable component includes a first guide rail and a second guide rail, which are arranged perpendicularly to each other. The first guide rail is mounted on the base, the movable slide is slidably connected to the first guide rail, the second guide rail is mounted on the movable slide, and the bottom of the support is slidably connected to the second guide rail.

8. The clamping fixture for press-fitting reducer bushings according to claim 7, characterized in that, The axis of the rotating shaft is arranged parallel to the first guide rail.

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