High-precision differential gear assembly device

Abstract

This utility model relates to the technical field of differential installation equipment, specifically a high-precision differential gear assembly device. It includes a base, a back plate mounted on the top of the base, a clamping component mounted on the upper front of the back plate, and a supporting component mounted on the lower front of the back plate. The differential housing is positioned in the center of the front of the back plate, clamped and positioned above by the clamping component and supported and positioned below by the supporting component. This high-precision differential gear assembly device effectively overcomes the defects of traditional assembly methods through a unique structural design. The clamping rod in the clamping component engages with a limit nut via a threaded rod, allowing for flexible height adjustment. The back of the clamping rod limits the differential housing flange area and the lower contact surface, while the central clamping screw further locks the flange, achieving three-dimensional precise positioning. This prevents the differential housing from shifting during assembly, ensures uniform gear meshing clearance, and significantly improves assembly accuracy.

Description

Technical Field

[0001] This utility model relates to the technical field of differential installation equipment, and more specifically, to a high-precision differential gear assembly device. Background Technology

[0002] In automotive transmission systems, the differential is a critical component, and the precision of its gear assembly directly affects the vehicle's transmission efficiency, stability, and service life. Currently, differential gears are mostly assembled manually or with simple mechanical assistance.

[0003] During manual assembly, variations in operator experience and techniques make it difficult to guarantee consistent assembly precision, easily leading to uneven gear meshing clearances, abnormal wear, and noise issues. Simple mechanically assisted assembly equipment, on the other hand, has a relatively rudimentary structure and lacks effective positioning and adjustment devices, making it impossible to precisely control the differential housing's position. This can cause the differential housing to shift during assembly, affecting assembly efficiency, potentially leading to gear misalignment, reduced overall differential performance, and in severe cases, rework, increasing production and time costs. Therefore, developing a differential gear assembly device that achieves high-precision positioning, stable support, and convenient operation is of significant practical importance. Utility Model Content

[0004] The purpose of this invention is to provide a high-precision differential gear assembly device to solve the problem mentioned in the background art that, during the manual assembly process, due to differences in the experience and operating techniques of operators, it is difficult to ensure consistent assembly precision each time, which easily leads to uneven gear meshing clearance, abnormal wear, and noise problems.

[0005] To achieve the above objectives, this utility model provides a high-precision differential gear assembly device, including a base, a back plate mounted on the top of the base, a pressing component mounted on the upper part of the front of the back plate, a supporting component mounted on the lower part of the front of the back plate, and a differential housing disposed in the middle of the front of the back plate, which is pressed and positioned above by the pressing component and supported and positioned below by the supporting component.

[0006] The clamping component includes two vertically mounted threaded rods. The bottom of the threaded rods is fixedly mounted on the base. A pressure rod is provided on the threaded rod. The two ends of the pressure rod are provided with sockets. The two threaded rods pass through the two sockets respectively and are threaded with limit nuts at the top. The back of the pressure rod abuts against the flange of the differential housing, and the lower side of the pressure rod abuts against the differential housing.

[0007] The support component includes a support frame fixedly mounted on the base, an adjusting screw threadedly connected to the middle of the support frame, and a support seat mounted on the top of the adjusting screw.

[0008] This setup provides basic support via a base, with the backplate serving as the vertical mounting surface. A stable positioning system is formed by the vertically arranged clamping and supporting components, constraining the differential housing to a precise position in the center of the backplate. This initial positioning of the differential housing provides a stable reference for subsequent gear assembly, reducing the risk of displacement during assembly. A threaded rod provides a linear adjustment path in the vertical direction. The pressure rod slides along the threaded rod through a socket and is locked in place by a limit nut. Pressure is applied to the flange and side surfaces using the back and bottom of the pressure rod, respectively. This system accommodates differential housings of different sizes, achieving stable clamping through dual-point contact to prevent displacement of the differential housing in both horizontal and vertical directions. The support frame serves as the basic structure, with an adjusting screw that moves up and down via a threaded joint, adjusting the height of the support base. This adapts to the height differences of different differential housing models, dynamically adjusting the support position to ensure the differential housing is at the optimal assembly height.

[0009] Preferably, the lower surface of the pressure rod is provided with an inwardly recessed contact surface.

[0010] This recessed design of the contact surface matches the curvature of the differential housing side surface, increasing the contact area. It disperses the clamping force, preventing localized stress concentration that could lead to housing deformation, while also increasing friction and enhancing positioning stability.

[0011] Preferably, the middle of the pressure rod is threaded with a clamping screw, and the end of the clamping screw abuts against the flange of the differential housing.

[0012] This setting applies axial force to the flange by means of a threaded clamping screw in the middle of the clamping rod. It provides additional positioning points, compensates for potential assembly gaps, ensures a perfect fit between the flange face and the back plate, and improves axial positioning accuracy.

[0013] Preferably, the support frame has a threaded opening in the middle, the adjusting screw is threadedly connected to the threaded opening, and the top end of the adjusting screw is rotatably connected to the support base through a bearing.

[0014] The threaded joint and the adjusting screw form a helical transmission mechanism. The bearing connection allows the support seat to rotate relative to each other but restricts axial displacement. When the adjusting screw is rotated, the support seat only moves up and down without rotating, avoiding torque interference to the differential housing and ensuring that the support force is vertically upward.

[0015] Preferably, the top of the support base is provided with an inwardly recessed arc-shaped support surface.

[0016] The curvature of the arc-shaped support surface matches the bottom profile of the differential housing, providing multi-point contact support. This increases the support area, reduces contact stress, prevents housing deformation, and simultaneously uses the arc-shaped constraint to limit the radial displacement of the differential housing.

[0017] Preferably, mounting plates are welded to both ends of the base, and the mounting plates are fixed to the processing station by bolts.

[0018] The mounting plate is rigidly connected to the machining station via bolts, fixing the entire device to the operating platform. This reduces vibration and displacement during assembly, improves the overall rigidity of the device, and ensures effective transmission and stability of assembly forces.

[0019] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0020] This high-precision differential gear assembly device effectively overcomes the shortcomings of traditional assembly methods through its unique structural design, achieving significant technical advantages. Regarding positioning accuracy, the pressure rod in the clamping component, through a threaded rod and a limiting nut, allows for flexible height adjustment. The back of the pressure rod limits the differential housing flange area, and the lower contact surface presses against the side surface. The central clamping screw further locks the flange, achieving three-dimensional precise positioning. This prevents the differential housing from shifting during assembly, ensuring uniform gear meshing clearance and significantly improving assembly accuracy. The adjusting screw of the support component connects to the threaded port, allowing for flexible adjustment of the support height according to the differential housing size and assembly requirements. Combined with the top arc-shaped support surface, it perfectly fits the bottom of the differential housing, providing stable and reliable support, further guaranteeing assembly accuracy and stability.

[0021] In terms of assembly efficiency and cost control, this device reduces rework caused by assembly errors through a stable positioning and support structure, thereby lowering production and time costs. At the same time, its simple structure and convenient operation do not rely on the experience and skills of operators. Ordinary workers can operate it after simple training, which effectively improves assembly efficiency and achieves efficient and high-precision assembly of differential gears. This is of great significance for improving the overall performance of the differential and the reliability of the vehicle transmission system. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0023] Figure 2 This is a schematic diagram of the clamping component in this utility model;

[0024] Figure 3 This is a schematic diagram of the supporting component in this utility model;

[0025] The meanings of the labels in the diagram are as follows:

[0026] 1. Base; 2. Back plate; 3. Clamping component; 31. Threaded rod; 32. Pressure rod; 321. Contact surface; 33. Limit nut; 34. Clamping screw; 4. Support component; 41. Support frame; 411. Threaded hole; 42. Support seat; 421. Support surface; 43. Adjusting screw; 5. Differential housing. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0028] This utility model provides a high-precision differential gear assembly device, such as... Figure 1 As shown, it includes a base 1, a back plate 2 is installed on the top of the base 1, a pressing component 3 is installed on the upper front of the back plate 2, a supporting component 4 is installed on the lower front of the back plate 2, and a differential housing 5 is located in the middle of the front of the back plate 2. It is pressed and positioned above by the pressing component 3 and supported and positioned below by the supporting component 4.

[0029] Using base 1 as the basic support platform, a back plate 2 is installed on top of it. A clamping component 3 is located on the upper part of the front of the back plate 2, and a support component 4 is located on the lower part. The differential housing 5 is placed in the center of the front of the back plate 2. The clamping component 3 clamps and positions the upper part of the differential housing 5, while the support component 4 supports and positions the lower part, forming a stable positioning system. This achieves the initial positioning of the differential housing 5, providing a stable reference for subsequent gear assembly and reducing the risk of displacement during assembly.

[0030] In this embodiment, as Figure 2 As shown, the clamping component 3 includes two vertically mounted threaded rods 31. The bottom of the threaded rods 31 is fixedly mounted on the base 1. A pressure rod 32 is provided on the threaded rod 31. The two ends of the pressure rod 32 are provided with sockets. The two threaded rods pass through the two sockets respectively. The top of the threaded rod 31 is threadedly connected to a limit nut 33 for limiting. The back of the pressure rod 32 abuts against the flange of the differential housing 5, and the lower side of the pressure rod 32 abuts against the side surface of the differential housing 5.

[0031] Two vertically mounted threaded rods 31 in the clamping component 3 provide a vertical adjustment path for the pressure rod 32. The pressure rod 32 has slots at both ends, through which the threaded rods 31 pass, and are locked in place by a limiting nut 33. The back of the pressure rod 32 limits the flange portion of the differential housing 5, and its lower side presses against the side surface of the differential housing 5. Depending on the size of the differential housing 5, the position of the pressure rod 32 on the threaded rods 31 can be adjusted to achieve stable clamping using double-point contact, preventing displacement of the differential housing 5 in both horizontal and vertical directions.

[0032] Specifically, such as Figure 2 As shown, the lower surface of the pressure rod 32 has an inwardly recessed contact surface 321. The shape of this contact surface 321 matches the curvature of the side surface of the differential housing 5, increasing the contact area between them. This disperses the clamping force of the pressure rod 32 on the differential housing 5, preventing localized stress concentration that could lead to housing deformation, while also increasing friction and further enhancing the stability of the differential housing 5's positioning.

[0033] Furthermore, such as Figure 2 As shown, a clamping screw 34 is installed in the middle of the pressure rod 32, and the end of the clamping screw 34 abuts against the flange of the differential housing 5. The clamping screw 34, installed in the middle of the pressure rod 32, applies axial force to the flange of the differential housing 5 through threaded transmission, thus clamping and positioning it. This provides an additional positioning point, compensates for any possible assembly clearances, ensures that the flange face of the differential housing 5 is completely fitted with the back plate 2, and effectively improves axial positioning accuracy.

[0034] Furthermore, such as Figure 3 As shown, the support component 4 includes a support frame 41 fixedly mounted on the base 1. An adjusting screw 43 is threadedly connected to the middle of the support frame 41, and a support seat 42 is mounted on the top of the adjusting screw 43. The support frame 41 serves as the basic structure, and the height of the support seat 42 can be adjusted by rotating the adjusting screw 43. This allows for adaptation to height differences in different models of differential housings 5, dynamically adjusting the position of the support seat 42 to ensure the differential housing 5 is at the optimal assembly height.

[0035] Furthermore, such as Figure 3 As shown, a threaded opening 411 is provided in the middle of the support frame 41. The adjusting screw 43 is threadedly connected to the threaded opening 411, and the top end of the adjusting screw 43 is rotatably connected to the support base 42 through a bearing. When the adjusting screw 43 is rotated, the support base 42 is raised or lowered using threaded transmission. The bearing connection ensures that the support base 42 only performs raising and lowering movements and does not rotate. During the adjustment of the height of the support base 42, torque interference with the differential housing 5 is avoided, ensuring that the supporting force is vertically upward, making the differential housing 5 more stable.

[0036] Furthermore, such as Figure 3 As shown, the top of the support base 42 is provided with an inwardly recessed arc-shaped support surface 421. The curvature of this arc-shaped support surface 421 matches the bottom contour of the differential housing 5, forming a multi-point contact support. This increases the support area, reduces contact stress, and prevents deformation of the bottom of the differential housing 5 due to uneven stress. At the same time, the arc-shaped constraint restricts the radial displacement of the differential housing 5.

[0037] Furthermore, such as Figure 1 As shown, mounting plates are welded to both ends of the base 1, and the mounting plates are fixed to the machining station with bolts. The mounting plates are welded to both ends of the base 1 and fixed to the machining station with bolts, ensuring the entire device is stably installed on the operating platform. This reduces vibration and displacement of the device during assembly, improves the overall rigidity of the device, ensures effective transmission of assembly forces, and guarantees stable assembly work.

[0038] When using the high-precision differential gear assembly device of this utility model, the mounting plates at both ends of the base 1 are first fixedly connected to the processing station with bolts, so that the entire assembly device is stably installed on the operating platform, ensuring that the device will not be displaced due to vibration or external force during subsequent assembly, thus providing a stable foundation for the assembly work.

[0039] Place the differential housing 5 in the center of the front of the back plate 2. At this time, the differential housing 5 is in a preliminary positioning state. The upper part is pressed by the clamping component 3, and the lower part is supported by the support component 4.

[0040] Based on the actual height of the differential housing 5, rotate the adjusting screw 43 in the support component 4. The adjusting screw 43 and the threaded port 411 in the middle of the support frame 41 are threaded together, causing the support seat 42 to rise or fall until the arc-shaped support surface 421 at the top of the support seat 42 is tightly fitted with the bottom of the differential housing 5, providing stable bottom support for the differential housing 5. At the same time, the bearing connection ensures that the support seat 42 will not cause torque interference to the differential housing 5 during the adjustment process.

[0041] Based on the dimensions of the differential housing 5, the pressure rod 32 is moved up and down by adjusting the limiting nut 33 on the threaded rod 31 in the clamping component 3, so that the back of the pressure rod 32 fits against the flange of the differential housing 5, and the lower contact surface 321 is in close contact with the side surface of the differential housing 5; then the clamping screw 34 in the middle of the pressure rod 32 is rotated so that its end applies axial pressure to the flange of the differential housing 5, further clamping and positioning the differential housing 5, ensuring that the differential housing 5 is precisely constrained in the horizontal, vertical and axial directions and will not be displaced.

[0042] After the differential housing 5 is precisely positioned, the differential gears can be assembled. Since the differential housing 5 is stably fixed, it ensures uniform meshing clearance during gear assembly, improves assembly accuracy, and completes the assembly of high-precision differential gears.

[0043] After the gear assembly is completed, loosen the limiting nut 33 and the clamping screw 34 of the clamping component 3, and lower the pressure rod 32; then adjust the adjusting screw 43 of the support component 4, lower the support seat 42, and remove the assembled differential. The above steps can then be repeated according to the next assembly requirement to achieve cyclical use of the device.

[0044] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A high-precision differential gear assembly device, characterized in that: Includes a base (1), a back plate (2) is installed on the top of the base (1), a pressing component (3) is installed on the upper front of the back plate (2), a supporting component (4) is installed on the lower front of the back plate (2), and a differential housing (5) is located in the middle of the front of the back plate (2), and is pressed and positioned above by the pressing component (3) and supported and positioned below by the supporting component (4). The clamping component (3) includes two vertically installed threaded rods (31). The bottom of the threaded rods (31) is fixedly installed on the base (1). A pressure rod (32) is provided on the threaded rods (31). The two ends of the pressure rod (32) are provided with sockets. The two threaded rods (31) pass through the two sockets respectively and the top is threadedly connected to a limit nut (33). The back of the pressure rod (32) abuts against the flange of the differential housing (5). The lower side of the pressure rod (32) abuts against the differential housing (5). The support component (4) includes a support frame (41) fixedly installed on the base (1), an adjusting screw (43) is threadedly connected to the middle of the support frame (41), and a support seat (42) is installed on the top of the adjusting screw (43).

2. The high-precision differential gear assembly device according to claim 1, characterized in that: The lower surface of the pressure rod (32) is provided with an inwardly recessed fitting surface (321).

3. The high-precision differential gear assembly device according to claim 1, characterized in that: The middle part of the pressure rod (32) is threaded with a clamping screw (34), and the end of the clamping screw (34) abuts against the flange of the differential housing (5).

4. The high-precision differential gear assembly device according to claim 1, characterized in that: The support frame (41) has a threaded opening (411) in the middle. The adjusting screw (43) is threaded to the threaded opening (411). The top end of the adjusting screw (43) is rotatably connected to the support seat (42) through a bearing.

5. The high-precision differential gear assembly device according to claim 4, characterized in that: The top of the support base (42) is provided with an inwardly recessed arc-shaped support surface (421).

6. The high-precision differential gear assembly device according to claim 5, characterized in that: The base (1) has mounting plates welded to both ends, and the mounting plates are fixed to the processing station by bolts.

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