Differential roller assembly device and method

Abstract

The application discloses a differential gear needle assembly device which comprises a differential gear positioning mechanism and a needle jacking mechanism. The differential gear positioning mechanism comprises a cross shaft positioning seat and a planetary gear support seat. A plurality of planetary gear support seats are uniformly arranged in the circumferential direction of the cross shaft positioning seat. The planetary gear support seat is provided with a circular groove for supporting a planetary gear. The cross shaft positioning seat is provided with a plurality of cross shaft positioning grooves for accommodating a limiting cross shaft. The planetary gear placed in the circular groove is coaxially arranged with the cross shaft placed in the cross shaft positioning groove arranged opposite to the circular groove. The differential gear positioning mechanism further comprises a rotary disc, a base and a positioning assembly. The planetary gear support seat and the cross shaft positioning seat are fixedly connected to the upper end of the rotary disc. The rotary disc is rotationally connected to the base through a rotary unit. The application solves the technical problems of low assembly efficiency and unguaranteed quality in the field of differential gear needle assembly.

Description

Technical Field

[0001] This invention relates to the field of needle roller assembly technology in differential needle roller bearings, specifically to a differential needle roller assembly device and method. Background Technology

[0002] The differential is a crucial component of a vehicle's transmission system. Its primary function is to allow the left and right wheels to rotate at different speeds during vehicle operation, thus meeting the vehicle's needs under various conditions such as turning, starting, and climbing. The performance of the differential directly affects the vehicle's driving stability and driving experience.

[0003] Needle roller bearings play a crucial role in the construction of a differential. They reduce friction, improve transmission efficiency, and withstand the enormous loads generated by the differential's operation. The assembly quality of the needle roller bearings directly affects the service life and performance of the differential.

[0004] However, in the traditional assembly process of needle roller bearings for axle differentials, due to the large number of needle roller bearings (4), and the large number of needle rollers required for each needle roller bearing (32), the needle rollers are assembled one by one, and the number of needle rollers after assembly is difficult to confirm, resulting in efficiency problems and potential quality risks. Summary of the Invention

[0005] The purpose of this invention is to overcome the above-mentioned technical deficiencies and provide a differential needle roller assembly device and method, solving the technical problems of low assembly efficiency and inability to guarantee quality in the field of needle roller assembly technology for differential needle roller bearings.

[0006] To achieve the above-mentioned technical objectives, the present invention provides a differential needle roller assembly device and method, comprising:

[0007] A differential positioning mechanism and a needle roller advancing mechanism; the differential positioning mechanism includes a cross shaft positioning seat and a planetary gear support seat; a plurality of planetary gear support seats are evenly circumferentially arranged on the cross shaft positioning seat; the planetary gear support seats have circular grooves for supporting planetary gears; the cross shaft positioning seat has a plurality of cross shaft positioning grooves relative to the plurality of planetary gear support seats for accommodating and limiting cross shafts; the planetary gears placed in the circular grooves are coaxially arranged with the cross shafts placed in the cross shaft positioning grooves arranged opposite to the circular grooves.

[0008] Compared with the prior art, the beneficial effects of the present invention include:

[0009] 1. Improved assembly efficiency: The differential needle roller assembly device provided by this invention, by setting a rotary table that can rotate 360°, satisfies the four-way rotation of the workpiece and completes the needle roller assembly in four rotations, which greatly improves the assembly efficiency of differential needle rollers, saves labor costs, and reduces assembly time.

[0010] 2. Precise control of assembly quality: The differential needle roller assembly device provided by this invention can ensure stability in the assembly direction by setting a cross shaft positioning seat and a planetary gear support seat. It can precisely control the assembly position of the needle rollers to ensure the consistency and stability of assembly quality, thereby improving the reliability and performance of the product.

[0011] 3. Reduce assembly errors: The differential needle roller assembly device provided by this invention ensures that the needle rollers are installed in the positioning direction by setting a positioning support and a sleeve. This effectively reduces human error during the assembly process, improves assembly accuracy, and reduces the scrap rate.

[0012] 4. Reduce assembly costs: The differential needle roller assembly device provided by this invention can reduce the number of tool changes and manual adjustments during the assembly process, thereby reducing assembly costs. Attached Figure Description

[0013] Figure 1 This is a three-dimensional structural schematic diagram of the differential needle roller assembly device provided by the present invention;

[0014] Figure 2 This is a cross-sectional view of the differential needle roller assembly device provided by the present invention. Figure 1 .

[0015] Figure 3 This is a cross-sectional view of the differential needle roller assembly device provided by the present invention. Figure 2 ;

[0016] Figure 4 This is a cross-sectional view of the differential needle roller assembly device provided by the present invention. Figure 3 . Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0018] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly attached to the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0019] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0020] Please see Figure 1 , Figure 2 , Figure 3 , Figure 4 This embodiment provides a differential needle roller assembly device, including: a differential positioning mechanism 1 and a needle roller pushing mechanism 2.

[0021] Furthermore, the differential positioning mechanism 1 includes a cross shaft positioning seat 11 and a planetary gear support seat 12. A plurality of planetary gear support seats 12 are evenly circumferentially arranged on the cross shaft positioning seat 11. The planetary gear support seat 12 has a circular groove 12a for supporting the planetary gear 3. The cross shaft positioning seat 11 has a plurality of cross shaft positioning grooves 11a for accommodating and limiting the cross shaft relative to the plurality of planetary gear support seats 12. The planetary gear 3 placed in the circular groove 12a and the cross shaft 4 placed in the cross shaft positioning groove 11a arranged opposite to the circular groove 12a are coaxially arranged.

[0022] Preferably, there are four planetary gear support seats 12, four circular grooves 12a, and four cross shaft positioning grooves 11a, with the four circular grooves 12a and the four cross shaft positioning grooves 11a arranged in a one-to-one correspondence.

[0023] Specifically, when the planetary gear 3 placed in the circular groove 12a and the cross shaft 4 placed in the cross shaft positioning groove 11a opposite to the circular groove 12a are arranged coaxially, the mounting holes of the cross shaft 4 and the planetary gear 3 create an annular gap. The gap width is equal along the circumference, which facilitates the installation of needle rollers, improves the installation efficiency of needle rollers, reduces installation errors, and improves the quality of needle roller installation.

[0024] Furthermore, the differential positioning mechanism 1 also includes a rotary table 13, a base 14, and a positioning component 15. The planetary gear support seat 12 and the cross shaft positioning seat 11 are both fixedly connected to the upper end of the rotary table 13. The rotary table 13 is rotatably connected to the base 14 through a rotary unit 16.

[0025] Preferably, the rotating unit 16 is selected as a bearing.

[0026] Furthermore, the positioning assembly 15 includes a positioning support 151, a positioning rod 152, and a sleeve 153. The positioning support 151 is fixed to the upper end of the base 14. The sleeve 153 is inserted into the positioning support 151. The positioning rod 152 is fitted with an elastic element 154 and is inserted into the sleeve 153. One end of the positioning rod 152 is inserted into the rotary table positioning groove 13a opened in the rotary table 13.

[0027] Preferably, the elastic element 154 is selected as a spring. In this embodiment, the spring plays a supporting and self-recovering role, and has the following advantages: 1. Elastic deformation capability: The spring can undergo elastic deformation when subjected to external force and return to its original shape after the external force is removed, which allows it to store and release energy; 2. Stability and supporting function: The spring provides stable supporting force, maintains the balance of the structure, and prevents instability caused by factors such as temperature changes and load fluctuations; 3. Self-recovering function: The spring can restore its shape on its own after the load is removed, without the need for external repair or replacement; 4. Durability: Springs usually have a long service life and can maintain stable performance under harsh environments and repeated loads.

[0028] Specifically, when installing needle rollers on different planetary gears 3 and cross shafts 4, the rotary table 13 needs to be rotated, and the rotary table 13 is positioned by inserting the positioning rod 152 into the rotary table positioning groove 13a.

[0029] Furthermore, the needle roller ejector mechanism 2 is arranged opposite to the planetary gear support seat 12. The needle roller ejector mechanism 2 includes an ejector bracket 21, an ejector sleeve 22, an ejector rod 23, and a needle roller support block 24. The needle roller support block 24 is fixed to one end of the ejector bracket 21 and has a needle roller limiting groove 24a. The ejector sleeve 22 is placed in the inner cavity of the ejector bracket 21. One end of the ejector sleeve 22 is fixedly connected to one end of the ejector rod 23, and the other end of the ejector rod 23 is fixedly connected to an ejector assembly 25.

[0030] Furthermore, the jacking assembly 25 includes a first jacking connection 251 and a second jacking connection 252. One end of the first jacking connection 251 is hinged to the end of the jacking rod 23 away from the jacking sleeve 22. One end of the second jacking connection 252 is hinged to the first jacking connection 251. The other end of the second jacking connection 252 is fixedly connected to the jacking bracket 21 through a fixing block 253.

[0031] Preferably, the outer diameter of the push-in sleeve 22 is the same as the outer diameter formed by a group of needle rollers 5, which facilitates pushing all the needle rollers 5 into the gap between the cross shaft 4 and the planetary gear 3 at once.

[0032] Specifically, when performing the needle roller jacking operation, the first jacking connecting part 251 is moved. Under the support of the second jacking connecting part 252, the first jacking connecting part 251 drives the jacking rod 23 to move toward the planetary gear 3. The jacking rod 23 drives the jacking sleeve 22 to push the needle roller 5 into the gap between the cross shaft 4 and the planetary gear 3.

[0033] The invention also provides a differential needle roller assembly method, comprising the following steps:

[0034] S1: Clean the impurities on the working surfaces of the cross shaft positioning seat 11 and planetary gear support seat 12, and accurately place the differential to be installed with the needle rollers on the cross shaft positioning seat 11 and planetary gear support seat 12.

[0035] S2: Pull out the positioning rod 152, rotate the rotary table 13, and insert the positioning rod 152 into the rotary table positioning groove 13a;

[0036] S3: Place a set of needle rollers 5 into the needle roller limiting groove 24a of the needle roller support block 24, and move the first connecting part 251 to push the needle rollers 5 into the gap between the cross shaft 4 and the planetary gear 3.

[0037] S4: Pull out the positioning rod 152, rotate the rotary table 13 by 90°, insert the positioning rod 152 into the next rotary table positioning groove 13a, repeat S3, and push in another set of needle rollers 5;

[0038] S5: Repeat S4 until the differential needle rollers are installed.

[0039] Working principle: The differential needle roller assembly device provided by this invention includes a differential positioning mechanism 1 and a needle roller advancing mechanism 2. The differential positioning mechanism 1 includes a cross shaft positioning seat 11 and a planetary gear support seat 12. A plurality of planetary gear support seats 12 are evenly circumferentially arranged on the cross shaft positioning seat 11. The planetary gear support seat 12 has a circular groove 12a for supporting the planetary gears 3. The cross shaft positioning seat 11 has a plurality of cross shaft positioning grooves 11a for accommodating and limiting the cross shaft 4 relative to the plurality of planetary gear support seats 12. The planetary gears 3 placed in the circular grooves 12a and the cross shaft 4 placed in the cross shaft positioning grooves 11a opposite to the circular grooves 12a are coaxially arranged.

[0040] Specifically, firstly, clean the impurities on the working surfaces of the cross shaft positioning seat 11 and planetary gear support seat 12 to avoid impurities on the worktable surface affecting the installation quality. Secondly, pull out the positioning rod 152, rotate the rotary table 13, and insert the positioning rod 152 into the rotary table positioning groove 13a. At the same time, place a set of needle rollers 5 into the needle roller limiting groove 24a of the needle roller support block 24, and move the first jacking connecting part 251 to push the needle rollers 5 into the gap between the cross shaft 4 and the planetary gear 3. Finally, pull out the positioning rod 152, rotate the rotary table 13 90°, insert the positioning rod 152 into the next rotary table positioning groove 13a, and place another set of needle rollers 5 into the needle roller limiting groove 24a again. Move the first jacking connecting part 251 to push the needle rollers 5 into the gap between the cross shaft 4 and the planetary gear 3, and push in another set of needle rollers 5. Repeat the above steps until the differential needle rollers are installed.

[0041] The specific embodiments of the present invention described above do not constitute a limitation on the scope of protection of the present invention. Any other corresponding changes and modifications made in accordance with the technical concept of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A differential needle roller assembly device, characterized in that, include: A differential positioning mechanism and a needle roller advancing mechanism; the differential positioning mechanism includes a cross shaft positioning seat and a planetary gear support seat; a plurality of planetary gear support seats are evenly circumferentially arranged on the cross shaft positioning seat; the planetary gear support seats have circular grooves for supporting planetary gears; the cross shaft positioning seat has a plurality of cross shaft positioning grooves relative to the plurality of planetary gear support seats for accommodating and limiting cross shafts; the planetary gears placed in the circular grooves are coaxially arranged with the cross shafts placed in the cross shaft positioning grooves arranged opposite to the circular grooves.

2. The differential needle roller assembly device according to claim 1, characterized in that, The differential positioning mechanism also includes a rotary table, a base, and a positioning component; the planetary gear support and the cross shaft positioning seat are both fixedly connected to the upper end of the rotary table; the rotary table is rotatably connected to the base through a rotary unit.

3. The differential needle roller assembly device according to claim 2, characterized in that, The positioning assembly includes a positioning support, a positioning rod, and a sleeve; the positioning support is fixed to the upper end of the base; the sleeve is inserted into the positioning support; the positioning rod is fitted with an elastic element and is inserted into the sleeve; one end of the positioning rod is inserted into the rotary table positioning groove opened in the rotary table.

4. The differential needle roller assembly device according to claim 3, characterized in that, The needle roller jacking mechanism is arranged opposite to the planetary gear support seat; the needle roller jacking mechanism includes a jacking bracket, a jacking sleeve, a jacking rod, and a needle roller support block; the needle roller support block is fixed to one end of the jacking bracket; the needle roller support block has a needle roller limiting groove; the jacking sleeve is placed in the inner cavity of the jacking bracket; one end of the jacking sleeve is fixedly connected to one end of the jacking rod; the other end of the jacking rod is fixedly connected to a jacking assembly.

5. The differential needle roller assembly device according to claim 4, characterized in that, The jacking assembly includes a first jacking connection and a second jacking connection; one end of the first jacking connection is hinged to the end of the jacking rod away from the jacking sleeve; one end of the second jacking connection is hinged to the first jacking connection; the other end of the second jacking connection is fixedly connected to the jacking bracket through a fixing block.

6. A method for assembling needle rollers in a differential, characterized in that, The differential needle roller assembly device as described in claim 5 includes the following steps: S1: Clean the impurities on the working surfaces of the cross shaft positioning seat and planetary gear support seat, and accurately place the differential to be installed with needle rollers into the cross shaft positioning seat and planetary gear support seat. S2: Pull out the positioning rod, rotate the rotary table, and insert the positioning rod into the positioning groove of the rotary table; S3: Place a set of needle rollers in the needle roller limiting groove of the needle roller support block, and move the first connecting part to push the needle rollers into the gap between the cross shaft and the planetary gear. S4: Pull out the positioning rod, rotate the rotary table 90°, insert the positioning rod into the next rotary table positioning groove, repeat S3, and push in another set of needle rollers; S5: Repeat S4 until the differential needle rollers are installed.

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