A rear axle housing assembly center positioning device

Abstract

This utility model discloses a rear axle housing assembly center positioning device, comprising: a center seat, a connecting sleeve, a rotating shaft flange, a connecting body, a connecting nut, a flat key, a guide rod spring, a spring adjuster, a support plate, a limiting plate, a sliding shaft, a limiting cone sleeve, a limiting nut, a center seat bracket, and a limiting rod; the connecting sleeve is sleeved on the outside of the center seat; the rotating shaft flange is fixed to one end of the center seat by the connecting body and the connecting nut; the flat key is disposed between the center seat and the connecting sleeve; the guide rod spring and the spring adjuster are installed on the center seat to provide elastic preload; the support plate is used to support the guide rod spring; the limiting plate, the sliding shaft, the limiting cone sleeve, and the limiting nut together constitute the axial limiting mechanism of the device. This application, through the precise cooperation of the center seat, the connecting sleeve, and the rotating shaft flange, combined with circumferential positioning by the flat key, effectively ensures high coaxiality between the rotating and fixed components.

Description

Technical Field

[0001] This utility model relates to the field of automotive parts processing, and in particular to a rear axle housing assembly center positioning device. Background Technology

[0002] Taking the BBUH (Bridge Housing Assembly) welding section of the axle housing workshop as an example: the production process of line A in the axle housing workshop welding section is as follows: Assemble and secure the upper and lower plates and triangular plates of the axle housing body → Weld Y-type welds → Level the large flange face of the axle housing body assembly → Secure the reinforcing ring and housing cover assembly to the rear axle housing body assembly → Ring weld the reinforcing ring and housing cover assembly → Secure the leaf spring seat to the axle housing body assembly → Weld the leaf spring seat to the axle housing body and add eight points → Assemble and secure the flange head to the axle housing body assembly → Ring weld the flange head → Secure the shock absorber bracket and motor bracket to the axle housing body assembly → Spot weld the cable bracket assembly (left and right) and oil pipe bracket I to the axle housing body and weld the oil pipe clamp to the axle housing body → Weld the shock absorber bracket, motor bracket, tee bracket (V), and cable bracket assembly (left and right) to the axle housing body and add four points of protrusion → Weld the oil pipe bracket and oil pipe clamp to the axle housing body → Shaping The production process for the rear axle housing assembly BBDH in the welding section A of the axle housing workshop is as follows: Assemble and tack-fix the upper and lower plates and triangular plates of the axle housing body → Weld Y-type welds → Level the large flange surface of the axle housing body assembly → Tack-fix the reinforcing ring and housing cover assembly to the rear axle housing body assembly → Ring weld the reinforcing ring and housing cover assembly → Tack-fix the leaf spring seat to the axle housing body assembly → Weld the leaf spring seat to the axle housing body and add eight points → Assemble and tack-fix the flange head to the axle housing body assembly → Ring weld the flange head → Tack-fix the shock absorber bracket and motor bracket to the axle housing body assembly → Cable support assembly (left and right) 1. Welding of oil pipe bracket I to axle housing body and welding of oil pipe clamp to axle housing body → Welding of shock absorber bracket, motor bracket seat, tee bracket (V), cable bracket assembly (left and right) to axle housing body assembly and repair of four protrusions → Welding of oil pipe bracket and oil pipe clamp to axle housing body → Shaping.

[0003] In other words, when producing BBUH- and BBDH- rear axle housing assemblies on welding line A in the axle housing workshop, the process flow for both products is the same. The tooling used for producing the BBDH- rear axle housing assembly cannot be completely reused when producing the BBUH- rear axle housing assembly, mainly because the overall length (blank) of the BBDH- rear axle housing assembly is [blank] mm; the half-length of the axle body is [blank] mm on one side (long half-length is [blank] mm, short half-length is [blank] mm); the current welding tooling can only produce rear axle housing assemblies with a maximum half-length of [blank]. Although the overall length (blank) of the BBUH- rear axle housing assembly is also [blank] mm; the half-length of the axle body is [blank] mm on one side (long half-length is [blank] mm, short half-length is [blank] mm); the long half-length of [blank] mm exceeds the maximum half-length allowed by the tooling [blank] mm. In this situation, using a traditional center positioning device, the BBUH rear axle housing assembly cannot be manufactured. Multiple large tooling sets must be separately fabricated, including "spot-fixing the shock absorber bracket, motor bracket seat to the axle housing assembly," "spot-welding the oil pipe bracket I to the axle housing body and welding the oil pipe clamps to the axle housing body," and "welding the oil pipe bracket and oil pipe clamps to the axle housing body." This patent addresses these existing technical problems by improving the "rear axle housing assembly center positioning device." Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies and provide a rear axle housing assembly center positioning device.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows: A rear axle housing assembly center positioning device includes: a center seat, a connecting sleeve, a rotating shaft flange, a connecting body, a connecting nut, a flat key, a guide rod spring, a spring adjuster, a support plate, a limiting plate, a sliding shaft, a limiting cone sleeve, a limiting nut, a center seat bracket, and a limiting rod; The center seat serves as the base of the device; the connecting sleeve is fitted outside the center seat; the rotating shaft flange is fixed to one end of the center seat by a connecting body and a connecting nut. A flat key is positioned between the center seat and the connecting sleeve; a guide rod spring and a spring adjuster are mounted on the center seat to provide elastic preload; a support plate is used to support the guide rod spring; a limiting plate, a sliding shaft, a limiting cone sleeve, and a limiting nut together constitute the axial limiting mechanism of the device; a center seat bracket is used to install and fix the entire device; and a limiting rod is laterally positioned on the center seat bracket.

[0006] Furthermore, the connecting sleeve and the center seat are connected by a flat key to achieve circumferential positioning and torque transmission.

[0007] Furthermore, the preload of the guide rod spring is adjusted by a spring adjuster to suit different working conditions.

[0008] Furthermore, the limiting cone sleeve cooperates with the limiting nut, and the axial limiting position of the slide shaft can be precisely adjusted by rotating the limiting nut.

[0009] Furthermore, a limiting rod is provided on the central seat support to limit the lateral movement freedom of the central seat and improve the overall stability of the device.

[0010] Furthermore, the rotating flange, connecting body, and connecting nut together form a detachable connection structure, which facilitates the assembly and maintenance of the device.

[0011] Furthermore, the support plate contacts one end of the guide rod spring to uniformly transmit the spring force to the center seat or external load.

[0012] Furthermore, the sliding shaft is slidably inserted into the limiting plate, and its sliding stroke is limited by the limiting cone sleeve and the limiting nut.

[0013] Furthermore, the coaxiality error of the center seat, connecting sleeve, and rotating flange is less than 0.02mm.

[0014] The beneficial effects of this utility model are as follows: 1. High positioning accuracy and good rigidity: Through the precise cooperation of the center seat, connecting sleeve and rotating shaft flange, and combined with the flat key for circumferential positioning, the high coaxiality between the rotating part and the fixed part (such as less than 0.02mm) is effectively guaranteed, providing extremely high positioning accuracy and torsional rigidity, which meets the assembly requirements of high-precision equipment.

[0015] 2. High degree of integration and compact structure: It integrates multiple functions such as center positioning, torque transmission, elastic buffering, and mechanical limit into a unified device. The compact structure design reduces the number of parts, saves installation space, and simplifies the overall equipment structure.

[0016] 3. Precise and adjustable limit, strong adaptability: Through the cooperation of the limit cone sleeve and the limit nut, the axial travel of the slide shaft can be precisely and conveniently finely adjusted, so as to flexibly adapt to different installation gaps and working stroke requirements, and has strong versatility.

[0017] 4. Buffering and shock absorption, stable performance: The unique combination design of guide rod spring and spring adjuster not only provides adjustable elastic preload, but also effectively absorbs and buffers axial impact and vibration, protects related components from rigid impact, and improves the smoothness and service life of the entire transmission system.

[0018] 5. Convenient installation and commissioning, easy maintenance: The rotating shaft flange, connecting body, etc., adopt a detachable modular design, which facilitates rapid assembly, alignment, and subsequent maintenance of the device. The cooperation between the center seat bracket and the lateral limit rod further simplifies the installation and commissioning process and improves the assembly efficiency of downstream equipment. Attached Figure Description

[0019] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific 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.

[0020] Figure 1 This is a cross-sectional schematic diagram of this application.

[0021] Figure 2 This is a side view of this application. Detailed Implementation

[0022] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0023] like Figure 1 , Figure 2 As shown, the specific implementation of the central positioning device provided by this utility model is as follows: The central positioning device mainly consists of three parts: a central positioning system, an elastic buffer system, and a mechanical limit system.

[0024] The core of the center positioning system is a stepped shaft-shaped center seat 1. The left end of the center seat 1 is circumferentially fixed to a cylindrical connecting sleeve 2 via a flat key 6. A rotating flange 3 is bolted to an external device (such as a motor or spindle). The rotating flange 3 is fitted and positioned against the left end face of the center seat 1 via an annular connecting body 4. Finally, a large connecting nut 5 is screwed into the threaded end of the center seat 1 to tightly press the rotating flange 3 and the connecting body 4 onto the center seat 1, forming a robust and detachable connection.

[0025] The elastic buffer system is integrated on the right side of the center seat 1. A support plate 9 is fitted onto the shoulder of the center seat 1. One end of a guide rod spring 7 rests against the support plate 9, and the other end contacts a spring adjuster 8. In this embodiment, the spring adjuster 8 is an adjusting ring with external threads. By turning the adjuster, the compression of the guide rod spring 7 can be changed, thereby achieving stepless adjustment of the elastic preload to adapt to different axial loads.

[0026] The mechanical limiting system is used to precisely control the axial movement of the device. The right end of a sliding shaft 11 passes through a limiting plate 10 fixed to a central support 14. A limiting cone sleeve 12 and a limiting nut 13 are sequentially fitted onto the left end of the sliding shaft 11. By tightening or loosening the limiting nut 13, the limiting cone sleeve 12 can be driven to move axially, thereby changing the extreme position of the contact between the limiting cone sleeve 12 and the limiting plate 10, achieving precise mechanical limiting of the leftward sliding stroke of the sliding shaft 11. Furthermore, a limiting rod 15 is laterally fixed to the central support 14, passing through a radial through hole in the central support 1, to restrict the rotation and radial movement of the central support 1 itself, ensuring that it only has a preset axial degree of freedom.

[0027] The working process of the center positioning device in this application is as follows: When the external equipment drives the rotating flange 3 to rotate, the torque is transmitted to the center seat 1 through the connecting body 4 and the connecting nut 5, and then to the connecting sleeve 2 through the flat key 6, ultimately driving the component connected to the connecting sleeve 2 to rotate. When the device is subjected to an axial force to the left, the center seat 1 tends to move to the left. At this time, the guide rod spring 7 is further compressed, which plays a role in buffering and shock absorption. If the axial displacement is too large, the sliding shaft 11 will move to the left until the limiting cone sleeve 12 on it contacts the limiting plate 10 and is forcibly stopped, thereby protecting the core component from damage. By adjusting the spring adjuster 8 and the limiting nut 13, the optimal buffer performance and safe stroke can be easily set under different working conditions.

[0028] This application achieves high-precision positioning and powerful transmission: through the cooperation of the center seat 1, the flat key 6 and the connecting sleeve 2, extremely high coaxiality and torque transmission capability are guaranteed.

[0029] Integrated and modular design: It integrates positioning, transmission, buffering and limiting functions into one compact structure, which is easy to install and maintain.

[0030] Flexible adjustment and wide adaptability: Users can easily adjust the buffer force through the spring adjuster 8 and accurately set the safety stroke through the limit nut 13, which greatly improves the adaptability of the equipment to different working conditions.

[0031] Safe and reliable operation: The mechanical limit mechanism (limit plate 10, sliding shaft 11, limit cone sleeve 12, limit nut 13) provides the final safety guarantee. Combined with the elastic buffer system, it effectively improves the service life and stability of the whole device.

[0032] The above are merely preferred embodiments of this utility model, but the scope of protection of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the scope of protection of this utility model. Therefore, the scope of protection of this utility model should be determined by the scope of the claims.

Claims

1. A rear axle housing assembly center positioning device, characterized in that, include: Center seat (1), connecting sleeve (2), rotating shaft flange (3), connecting body (4), connecting nut (5), flat key (6), guide rod spring (7), spring adjuster (8), support plate (9), limiting plate (10), sliding shaft (11), limiting cone sleeve (12), limiting nut (13), center seat bracket (14) and limiting rod (15); The central seat (1) serves as the base of the device; the connecting sleeve (2) is fitted onto the outside of the central seat (1); the rotating shaft flange (3) is fixed to one end of the central seat (1) by the connecting body (4) and the connecting nut (5); The flat key (6) is disposed between the center seat (1) and the connecting sleeve (2); the guide rod spring (7) and the spring adjuster (8) are mounted on the center seat (1) to provide elastic preload; the support plate (9) is used to support the guide rod spring (7); the limiting plate (10), the sliding shaft (11), the limiting cone sleeve (12) and the limiting nut (13) together constitute the axial limiting mechanism of the device; the center seat bracket (14) is used to install and fix the entire device; the limiting rod (15) is arranged laterally on the center seat bracket (14).

2. The rear axle housing assembly center positioning device according to claim 1, characterized in that, The connecting sleeve (2) is connected to the center seat (1) via the flat key (6) to achieve circumferential positioning and torque transmission.

3. The rear axle housing assembly center positioning device according to claim 1, characterized in that, The preload of the guide rod spring (7) is adjusted by the spring adjuster (8) to adapt to different working conditions.

4. The rear axle housing assembly center positioning device according to claim 1, characterized in that, The limiting cone sleeve (12) cooperates with the limiting nut (13), and the axial limiting position of the sliding shaft (11) can be precisely adjusted by rotating the limiting nut (13).

5. The rear axle housing assembly center positioning device according to claim 1, characterized in that, The center seat support (14) is provided with the limiting rod (15) to limit the lateral movement freedom of the center seat (1) and improve the overall stability of the device.

6. The rear axle housing assembly center positioning device according to claim 1, characterized in that, The rotating flange (3), the connecting body (4), and the connecting nut (5) together form a detachable connection structure, which facilitates the assembly and maintenance of the device.

7. The rear axle housing assembly center positioning device according to claim 1, characterized in that, The support plate (9) contacts one end of the guide rod spring (7) to uniformly transmit the spring force to the center seat (1) or the external load.

8. The rear axle housing assembly center positioning device according to claim 1, characterized in that, The sliding shaft (11) is slidably inserted in the limiting plate (10), and its sliding stroke is limited by the limiting cone sleeve (12) and the limiting nut (13).

9. The rear axle housing assembly center positioning device according to any one of claims 1 to 8, characterized in that, The coaxiality error of the center seat (1), connecting sleeve (2) and rotating flange (3) is less than 0.02 mm.

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