Assembly fixture for wire retaining rings for rear drive axle half shafts

Abstract

This invention relates to the field of rear drive axle assembly technology, and more particularly to an assembly fixture for a wire retaining ring for a rear drive axle half-shaft. The fixture includes an assembly sleeve containing a cylindrical wire retaining ring placement groove and a cylindrical clearance groove, the latter communicating with the bottom surface of the placement groove. During assembly, the wire retaining ring is first placed in the placement groove. Then, the assembly fixture with the wire retaining ring is aligned with the half-shaft end face. Next, the second end of the assembly sleeve is pressed or struck, causing the wire retaining ring and the assembly sleeve to expand outwards by the half-shaft. Finally, after the wire retaining ring moves into the half-shaft groove, it retracts and returns to its original position. Using this assembly fixture, the wire retaining ring only needs to expand to the outer diameter of the half-shaft to complete the assembly, effectively reducing the possibility of the wire retaining ring failing to retract and return to its original position, thus improving the assembly quality stability of the wire retaining ring.

Description

Technical Field

[0001] This invention relates to the field of rear drive axle assembly technology, and in particular to an assembly tool for a steel wire retaining ring for a rear drive axle half shaft. Background Technology

[0002] Due to space and cost considerations, non-load-bearing rear drive axles typically use wire retaining rings to fix the axle shafts axially. Currently, the wire retaining rings are usually installed into the axle shaft slots using calipers. The installer uses the calipers to expand (open) the wire retaining ring, allowing the portion of the ring passing through the axle shaft to enter the slot. Releasing the calipers allows the wire retaining ring to retract and snap back into place, completing the assembly. However, this method can easily lead to excessive expansion of the wire retaining ring, damaging it and preventing it from retracting properly, thus affecting the assembly quality and resulting in poor assembly stability. Summary of the Invention

[0003] The technical problem solved by this invention is to provide an assembly tooling for a steel wire retaining ring for a rear drive axle half shaft with good assembly quality stability.

[0004] The technical solution adopted by the present invention to solve its technical problem is: an assembly tool for a steel wire retaining ring for a rear drive axle half shaft, including an assembly sleeve, the two outer ends of the assembly sleeve being a first end and a second end, and a cylindrical steel wire retaining ring placement groove and a cylindrical relief groove being sequentially arranged in the assembly sleeve, the outer end of the cylindrical steel wire retaining ring placement groove being located in the surface of the first end, the cylindrical relief groove being connected to the bottom surface of the cylindrical steel wire retaining ring placement groove, and the cross-sectional circle diameter of the cylindrical steel wire retaining ring placement groove being larger than the cross-sectional circle diameter of the cylindrical relief groove;

[0005] At least one expansion groove is provided in the side wall of the assembly sleeve. The expansion groove is provided along the length direction of the assembly sleeve. The outer end of the expansion groove is located in the surface of the first end. The expansion groove is connected to the cylindrical steel wire retaining ring placement groove and the cylindrical relief groove.

[0006] Furthermore, the sleeve of the device is cylindrical in shape.

[0007] Furthermore, the cylindrical steel wire retaining ring placement groove and the cylindrical clearance groove are located at the very center of the assembly sleeve.

[0008] Furthermore, the sidewall and bottom surface of the cylindrical steel wire retaining ring placement groove are connected by a circular arc transition.

[0009] Furthermore, the side wall of the assembly sleeve is provided with four expansion grooves, which are evenly distributed on the assembly sleeve.

[0010] Furthermore, it also includes four expansion strip holes, which are evenly distributed on the assembly sleeve and are set along the length of the assembly sleeve. The expansion strip holes are connected to the cylindrical relief groove.

[0011] An expansion strip hole is connected to an expansion groove, and the width of the expansion strip hole is greater than the width of the expansion groove.

[0012] Furthermore, the surface of the sleeve is equipped with an anti-slip structure.

[0013] Furthermore, it also includes an assembly tool slot, the outer end of which is located in the surface of the second end, and the assembly tool slot is set at the very center of the assembly sleeve.

[0014] Furthermore, a protective buffer layer is provided on the outer side of the second end of the sleeve.

[0015] The beneficial effects of this invention are as follows: This invention is used for assembling wire retaining rings for rear drive axle half shafts. It includes an assembly sleeve with two outer ends, a first end and a second end, respectively. A cylindrical wire retaining ring placement groove and a cylindrical clearance groove are sequentially arranged within the assembly sleeve. The outer end of the cylindrical wire retaining ring placement groove is located in the surface of the first end. The cylindrical clearance groove is connected to the bottom surface of the cylindrical wire retaining ring placement groove, and the diameter of the cross-sectional circle of the cylindrical wire retaining ring placement groove is larger than the diameter of the cross-sectional circle of the cylindrical clearance groove. At least one expansion groove is provided in the side wall of the assembly sleeve. The expansion groove is arranged along the length of the assembly sleeve, with its outer end located in the surface of the first end. The expansion groove is connected to the cylindrical wire retaining ring placement groove and the cylindrical clearance groove. During assembly, first, the shaft wire retaining ring is placed in the cylindrical wire retaining ring placement groove. Then, the assembly fixture with the shaft wire retaining ring is aligned with the end face of the half-shaft. Next, the second end of the assembly sleeve is pressed or tapped, causing the shaft wire retaining ring and the assembly sleeve to expand outward by the half-shaft. The assembly sleeve carries the shaft wire retaining ring along the half-shaft. Finally, when the shaft wire retaining ring moves into the half-shaft slot, it retracts and returns to its original position. The assembly fixture is then removed, thus completing the assembly of the shaft wire retaining ring. It is evident that using the assembly fixture of this invention, the shaft wire retaining ring only needs to expand to the outer diameter of the half-shaft to complete the assembly, effectively reducing the possibility of the shaft wire retaining ring failing to retract and return to its original position, improving the assembly quality stability of the shaft wire retaining ring. Furthermore, the assembly fixture of this invention has a simple structure, is easy to use, and can be widely adopted. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the assembly tooling;

[0017] Figure 2 This is a sectional view of the assembly tooling;

[0018] Figure 3 yes Figure 2 Enlarged view of point A in the middle;

[0019] Figure 4 This is a schematic diagram of the assembly tooling for assembling the wire retaining ring for the shaft;

[0020] The markings are as follows: 1. Assembly sleeve, 2. Cylindrical steel wire retaining ring placement groove, 3. Cylindrical clearance groove, 4. Expansion groove, 5. Expansion strip hole, 6. Assembly tool groove, 7. Half shaft, 8. Half shaft slot. Detailed Implementation

[0021] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0022] like Figures 1 to 3 As shown, the present invention is an assembly fixture for a steel wire retaining ring for a rear drive axle half shaft. It includes an assembly sleeve 1, with two outer ends of the assembly sleeve 1 being a first end and a second end, respectively. A cylindrical steel wire retaining ring placement groove 2 and a cylindrical relief groove 3 are sequentially arranged in the assembly sleeve 1. The outer end of the cylindrical steel wire retaining ring placement groove 2 is located in the surface of the first end. The cylindrical relief groove 3 is connected to the bottom surface of the cylindrical steel wire retaining ring placement groove 2, and the cross-sectional circle diameter of the cylindrical steel wire retaining ring placement groove 2 is larger than the cross-sectional circle diameter of the cylindrical relief groove 3.

[0023] At least one expansion groove 4 is provided in the side wall of the assembly sleeve 1. The expansion groove 4 is provided along the length direction of the assembly sleeve 1. The outer end of the expansion groove 4 is located in the surface of the first end. The expansion groove 4 is connected to the cylindrical steel wire retaining ring placement groove 2 and the cylindrical relief groove 3.

[0024] During assembly, first place the shaft wire retaining ring in the cylindrical wire retaining ring placement groove 2. Then, align the assembly fixture with the shaft wire retaining ring on the end face of the half-shaft 7. Next, press or tap the second end of the mounting sleeve 1. The shaft wire retaining ring and the mounting sleeve 1 are expanded (opened) outward by the half-shaft 7. The mounting sleeve 1, carrying the shaft wire retaining ring, moves along the half-shaft 7. Figure 4 As shown, when the wire retaining ring for the shaft moves to the half-shaft slot 8, the wire retaining ring for the shaft retracts and returns to its original position. The assembly fixture is then removed, thus completing the assembly of the wire retaining ring for the shaft.

[0025] Using the assembly fixture of the present invention, the steel wire retaining ring for the shaft only needs to expand to the outer diameter of the half shaft 7 to complete the assembly, which effectively reduces the possibility that the steel wire retaining ring for the shaft cannot shrink and reset, improves the assembly quality stability of the steel wire retaining ring for the shaft, and the assembly fixture of the present invention has a simple structure, is easy to use, and can be used on a large scale.

[0026] Specifically, the half-shaft 7 is cylindrical in shape, and the wire retaining ring for the shaft can also be understood as a hollow cylinder. To ensure the assembly effect of the wire retaining ring and facilitate its use, for example... Figure 1As shown, the assembly sleeve 1 is cylindrical in shape. Furthermore, the cylindrical wire retaining ring placement groove 2 and the cylindrical clearance groove 3 are located at the very center of the assembly sleeve 1.

[0027] The edge of the shaft wire retaining ring is arc-shaped. To avoid damage to the shaft wire retaining ring, the side wall and bottom surface of the cylindrical wire retaining ring placement groove 2 are connected by an arc transition. The arc shape of the shaft wire retaining ring and the side wall and bottom surface of the cylindrical wire retaining ring placement groove 2 are in corresponding contact through an arc.

[0028] The function of the expansion groove 4 is to allow the assembly sleeve 1 to expand (open) outward by the half shaft 7. In order to ensure its performance, the side wall of the assembly sleeve 1 is provided with 4 expansion grooves 4. The 4 expansion grooves 4 are evenly distributed on the assembly sleeve 1, and the length direction of the expansion grooves 4 is the same as the length direction of the assembly sleeve 1.

[0029] To further improve the outward expansion effect of the assembly sleeve 1 and to make the entire assembly device more convenient to use. For example... Figure 1 , Figure 2 As shown, the present invention also includes four expansion strip holes 5, which are evenly distributed on the assembly sleeve 1. The expansion strip holes 5 are arranged along the length direction of the assembly sleeve 1 and are connected to the cylindrical relief groove 3. One expansion strip hole 5 is connected to one expansion groove 4, and the width of the expansion strip hole 5 is greater than the width of the expansion groove 4.

[0030] To reduce the possibility of slippage in the assembly sleeve 1, an anti-slip structure is provided on the surface of the assembly sleeve 1. The anti-slip structure can be an anti-slip protrusion or a rubber anti-slip sleeve.

[0031] Assembly personnel typically move the assembly sleeve 1, along the shaft and wire retainer, along the half-shaft 7 by pressing or striking the second end of the assembly sleeve 1. The invention also includes an assembly tool groove 6, the outer end of which is located within the surface of the second end, and the groove is positioned at the very center of the assembly sleeve 1. Tools are installed in the tool groove 6, and pushing the tool causes the assembly sleeve 1 to move along the half-shaft. To reduce damage to the assembly sleeve 1 when striking its second end, a protective buffer layer is provided on the outer side of the second end of the assembly sleeve 1.

Claims

1. An assembly fixture for wire retaining rings for rear drive axle half-shafts, characterized in that: The assembly includes a cylindrical sleeve (1), which is cylindrical in shape. The two outer ends of the assembly sleeve (1) are the first end and the second end, respectively. A cylindrical wire retaining ring placement groove (2) and a cylindrical relief groove (3) are arranged in sequence in the assembly sleeve (1). The side wall of the cylindrical wire retaining ring placement groove (2) is connected to the bottom surface by a circular arc transition. The outer end of the cylindrical wire retaining ring placement groove (2) is located in the surface of the first end. The cylindrical relief groove (3) is connected to the bottom surface of the cylindrical wire retaining ring placement groove (2). The cross-sectional circle diameter of the cylindrical wire retaining ring placement groove (2) is larger than the cross-sectional circle diameter of the cylindrical relief groove (3). At least one expansion groove (4) is provided in the side wall of the mounting sleeve (1). The expansion groove (4) is provided along the length direction of the mounting sleeve (1). The outer end of the expansion groove (4) is located in the surface of the first end. The expansion groove (4) is connected to the cylindrical steel wire retaining ring placement groove (2) and the cylindrical relief groove (3). The side wall of the assembly sleeve (1) is provided with 4 expansion grooves (4), which are evenly distributed on the assembly sleeve (1). It also includes 4 expansion strip holes (5), which are evenly distributed on the assembly sleeve (1). The expansion strip holes (5) are arranged along the length direction of the assembly sleeve (1). The expansion strip holes (5) are connected to the cylindrical relief groove (3). One expansion strip hole (5) is connected to one expansion groove (4), and the width of the expansion strip hole (5) is greater than the width of the expansion groove (4).

2. The assembly fixture for the wire retaining ring for the rear drive axle half-shaft as described in claim 1, characterized in that: The cylindrical steel wire retaining ring placement groove (2) and the cylindrical clearance groove (3) are set in the middle of the assembly sleeve (1).

3. The assembly fixture for the wire retaining ring for the rear drive axle half-shaft as described in claim 1, characterized in that: The surface of the sleeve (1) is provided with an anti-slip structure.

4. The assembly fixture for the wire retaining ring for the rear drive axle half-shaft as described in claim 1, characterized in that: It also includes an assembly tool slot (6), the outer end of which is located in the surface of the second end, and the assembly tool slot (6) is located in the middle of the assembly sleeve (1).

5. The assembly fixture for the wire retaining ring for the rear drive axle half-shaft as described in claim 1, characterized in that: A protective buffer layer is provided on the outer side of the second end of the sleeve (1).

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