Fastening socket spanner for round locking nut with thrust groove of automobile wheel end assembly
By designing a suitable fastening socket wrench structure, the problem of unstable positioning of round locking nuts with thrust grooves during assembly was solved, achieving stable operation and safe use of the wrench, and improving assembly efficiency and safety.
Patent Information
- Application Number
- CN202520498855.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-21
- Publication Date
- 2026-01-27
- Estimated Expiration
- 2035-03-21
AI Technical Summary
During the assembly process, existing round locking nuts with thrust grooves are difficult to position with a socket wrench, and are prone to tilting and shaking, resulting in damage to the thrust groove flange, uneven tightening torque, and unsafe operation.
A fastening socket wrench comprising a tightening disc, a positioning mandrel, and a connecting post has been designed. The edge of the tightening disc is bent to form a flange that fits the locking nut. The positioning mandrel has a square structure that is inserted into the axle housing shaft tube. The connecting post has an exhaust vent, a reinforcing ring, and a weight-reducing observation hole to ensure stable positioning and safe operation of the wrench.
It achieves stable positioning of the tightening socket wrench, reduces vibration, prevents damage to the thrust groove of the locking nut, improves tightening efficiency, ensures operational safety, and avoids being heavy and difficult to carry.
Smart Images
Figure CN223834427U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of automobile manufacturing technology, specifically a tightening socket wrench for a circular locking nut with a thrust groove in an automobile wheel end assembly. Background Technology
[0002] The wheel end assembly is a critical component of a vehicle, connecting the tires to the axle tube of the axle housing. It not only bears the weight of the entire vehicle but also transmits driving and braking torque. To ensure the proper functioning of the wheel end assembly, it must be correctly mounted on the axle tube of the axle housing.
[0003] The wheel end assembly is secured to the axle housing tube by a lock nut. If the lock nut is tightened too much, it will cause the wheel end to rotate inflexibly, overheat, and damage to parts. If the lock nut is tightened too much, it will cause the wheel end parts to become loose, especially the bearings, which will have their service life greatly shortened. Therefore, the tightness of the lock nut is crucial to the vehicle's lifespan and driving safety.
[0004] Conventional wheel end lock nuts and tightening brass wrenches are standard hexagonal or octagonal structures, with regular shapes, even force distribution, and are not prone to slippage or flipping when tightening. During wheel end assembly, the traditional method involves easily pre-tightening, tightening, and securing the lock nuts manually or with an air gun using a tightening brass wrench. However, in modern axle design and assembly, space constraints prevent the use of traditional hexagonal lock nuts in some axle wheel end assemblies due to their large size. This led to the development of circular lock nuts with thrust grooves. These circular lock nuts with thrust grooves are widely used in modern axles due to their small footprint, simple structure, and ease of manufacturing.
[0005] However, when assembling and tightening this type of round locking nut with a thrust groove, the force is borne by the thrust groove, which is generally shallow and has limited force capacity. When tightening manually or with a traditional socket wrench using an air gun, the socket wrench cannot be positioned properly and is easily tilted and shaken. This not only easily causes damage to the thrust groove of the locking nut, resulting in accidents such as the socket wrench falling and injuring the operator, but also leads to problems such as uneven tightening torque or unreliable tightening. At the same time, the vibration during assembly can easily damage the operator's palm, which brings certain adverse effects to the use process. Utility Model Content
[0006] To address the shortcomings of existing technologies, the purpose of this utility model is to provide a tightening socket wrench for a circular locking nut with a thrust groove in an automotive wheel end assembly. This wrench has a simple structure, is lightweight, easy to manufacture, and is robust and reliable, effectively avoiding the problems of being bulky and difficult to carry.
[0007] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a tightening socket wrench for a circular locking nut with a thrust groove in an automotive wheel end assembly, comprising a tightening disc, a positioning mandrel, and a connecting post; the edge of the tightening disc is bent forward to form a flange, and the inner side of the front end face of the flange is provided with a limiting ring groove adapted to the circular locking nut with a thrust groove, and a plurality of tightening teeth are provided at intervals on the limiting ring groove; the positioning mandrel is used to insert into the axle housing tube of the automotive wheel end assembly, and the rear end of the positioning mandrel is connected to the front side of the tightening disc; the front end of the connecting post is connected to the rear side of the tightening disc.
[0008] A further improvement is that the tightening disc, positioning mandrel, and connecting column are an integral structure and are located on the same axis.
[0009] A further improvement is that a reinforcing ring is provided around the outer front end of the flange.
[0010] A further improvement is that several positioning lines are provided along the axial direction on the outer front side of the flanged part.
[0011] A further improvement is that the positioning lines and tightening teeth are arranged in a one-to-one correspondence.
[0012] A further improvement is that the flanged part is provided with several weight reduction observation holes.
[0013] A further improvement is that a weight reduction observation hole is provided between each pair of adjacent tightening teeth, and the weight reduction observation hole has a U-shaped opening groove structure.
[0014] A further improvement is that the positioning mandrel has a square cross-section, and a weight-reducing hole is provided in the middle of the positioning mandrel along the axial direction, and a guide chamfer is provided at the front edge of the positioning mandrel.
[0015] A further improvement is that: the interior of the connecting column is provided with an axial exhaust hole, the front end of which is connected to the weight reduction hole, and the rear end of the exhaust hole is provided with a square hole for connecting the air gun.
[0016] A further improvement is that the connecting post is provided with an insertion hole along the radial direction for the force-applying rod to pass through.
[0017] The beneficial effects of this utility model are as follows:
[0018] 1. In this utility model, the fastening socket wrench has a simple structure, is lightweight, easy to manufacture, and is sturdy and reliable, effectively avoiding the problems of being bulky and difficult to carry.
[0019] 2. In this utility model, the positioning mandrel adopts a square structure, which fits with the inner hole of the axle housing shaft tube with a small clearance, facilitating insertion and removal. It can withstand the weight and radial force of the wrench, ensuring that the tightening socket wrench is always in a horizontal position, reducing vibration, and effectively reducing radial tilting and swaying of the tightening socket wrench during tightening, thus minimizing safety accidents and making tightening operations easier. Simultaneously, to ensure easy and smooth insertion of the positioning mandrel into the axle housing shaft tube, a 5x30° guide chamfer is machined at its front end.
[0020] 3. In this utility model, the fastening socket wrench is machined with a vent hole, which can effectively prevent the fastening socket wrench from being difficult to pull out of the inner hole of the axle housing shaft tube due to the air suction effect; in order to facilitate use and operation, the fastening socket wrench is machined with a weight-reducing hole, which can effectively reduce the weight.
[0021] 4. In this utility model, the outer circle of the fastening socket wrench is machined with a positioning line. The position of the positioning line coincides with the center line of the tightening teeth of the fastening socket wrench. This can effectively ensure that during use, the positioning line is aligned with the tightening groove of the inner circle locking nut with thrust groove, allowing for quick insertion of the fastening socket wrench and improving work efficiency.
[0022] 5. In this utility model, the weight reduction observation hole facilitates operation and effectively reduces weight; at the same time, the weight reduction observation hole can also observe the alignment of the tightening teeth of the fastening socket wrench with the thrust groove of the inner circular locking nut with thrust groove, which can quickly align and tighten the inner circular locking nut with thrust groove, and effectively prevent the thrust groove of the inner circular locking nut from being damaged by flipping.
[0023] 6. In this utility model, in order to ensure that the tightening teeth of the fastening socket wrench have sufficient strength, a reinforcing ring is designed on the outside of the tightening teeth, which can effectively prevent damage to the tightening teeth. Attached Figure Description
[0024] Figure 1 This is a perspective view of the fastening socket wrench in an embodiment of this utility model;
[0025] Figure 2 This is a perspective view of the fastening socket wrench from another side in an embodiment of this utility model.
[0026] Figure 3 This is a front view of the fastening socket wrench in an embodiment of this utility model;
[0027] Figure 4 This is a cross-sectional view of the fastening socket wrench in an embodiment of this utility model;
[0028] Figure 5 This is a schematic diagram showing the working state of the fastening socket wrench in an embodiment of this utility model.
[0029] Figure label:
[0030] 1-Tightening disc; 11-Flanged edge; 12-Limiting ring groove; 13-Tightening teeth; 14-Positioning line; 15-Reinforcing ring; 16-Weight reduction observation hole;
[0031] 2-Positioning mandrel; 21-Weight reduction hole; 22-Guide chamfer;
[0032] 3-Connecting post; 31-Square hole; 32-Vent hole; 33-Insert hole. Detailed Implementation
[0033] The embodiments of this utility model are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout.
[0034] In the description of this utility model, it should be noted that the directional terms such as "center", "horizontal (X)", "longitudinal (Y)", "vertical (Z)", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", and "counterclockwise" indicate the orientation and positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. They should not be construed as limiting the specific protection scope of this utility model.
[0035] The following description, in conjunction with the accompanying drawings, further illustrates specific embodiments of the present invention, making the technical solution and beneficial effects of the present invention clearer and more explicit. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, but should not be construed as limiting the present invention.
[0036] See Figures 1-4 As shown, this utility model embodiment provides a tightening socket wrench for a circular locking nut with a thrust groove in an automobile wheel end assembly, including a tightening disc 1, a positioning mandrel 2, and a connecting post 3; specifically, the tightening disc 1, the positioning mandrel 2, and the connecting post 3 are an integral structure and are located on the same axis.
[0037] The edge of the tightening disc 1 is bent forward to form a flange 11, and the inner side of the front end face of the flange 11 is provided with a limiting ring groove 12 that matches the circular locking nut with a thrust groove, and a plurality of tightening teeth 13 are provided at intervals on the limiting ring groove 12; specifically, a reinforcing ring 15 is provided around the outer side of the front end of the flange 11. A plurality of positioning lines 14 are provided axially on the outer side of the front end of the flange 11. The positioning lines 14 are arranged opposite to the tightening teeth 13 one by one. The flange 11 is provided with a plurality of weight reduction observation holes 16. A weight reduction observation hole 16 is provided between every two adjacent tightening teeth 13, and the weight reduction observation hole 16 has a U-shaped opening groove structure.
[0038] The positioning mandrel 2 is used to insert into the axle housing tube of the automobile wheel end assembly, and the rear end of the positioning mandrel 2 is connected to the front side of the tightening disc 1; specifically, the cross section of the positioning mandrel 2 is square, and the middle part of the positioning mandrel 2 is provided with a weight reduction hole 21 along the axial direction, and the front edge of the positioning mandrel 2 is provided with a guide chamfer 22.
[0039] The front end of the connecting post 3 is connected to the rear side of the tightening disc 1. Specifically, the connecting post 3 has an axially arranged vent hole 32 inside, the front end of which communicates with the weight reduction hole 21, and a square hole 31 for connecting an air gun is provided at the rear opening of the vent hole 32. The connecting post 3 has a radially arranged insertion hole 33 for the force-adding rod to pass through.
[0040] See Figure 5 As shown, the working principle of this utility model is as follows:
[0041] (1) The wheel end assembly is installed on the axle housing tube by the inner bearing and the outer bearing. First, the inner bearing and the wheel end assembly are installed on the axle housing tube, and then the outer bearing is fitted onto the axle housing tube.
[0042] (2) Manually screw the inner round locking nut with thrust groove into the axle housing shaft tube with 4-5 threads;
[0043] (3) Insert the front positioning mandrel of the fastening socket wrench into the inner hole of the shaft tube of the bridge housing. Observe that the positioning line on the outer circle of the front end of the fastening socket wrench is roughly aligned with the thrust groove of the inner circle locking nut with thrust groove. Ensure that the tightening teeth of the fastening socket wrench are inserted into the thrust groove of the inner circle locking nut with thrust groove. Push the fastening socket wrench into the inner circle locking nut with thrust groove.
[0044] (4) Straighten the tightening socket wrench and manually tighten the inner round locking nut with thrust groove using a lever or air gun.
[0045] (5) After the outer bearing is tightened to the required level by using a fastening socket wrench with the inner circular locking nut with the thrust groove, the locking plate is installed; similarly, after tightening the outer circular locking nut with the thrust groove to the required level by using a fastening socket wrench, the locking teeth of the locking plate are flipped and pressed into the thrust grooves of the inner and outer circular locking nuts to lock them in place, preventing the locking nuts from rotating and loosening.
[0046] In this utility model, the fastening socket wrench is designed with a limiting positioning surface, which is used to prevent the end face of the fastening socket wrench from contacting the end face of the outer bearing during tightening, ensuring a gap of about 2mm, and effectively preventing the fastening socket wrench from damaging the end face of the outer bearing.
[0047] The limiting depth H of the tightening socket wrench must ensure sufficient allowance. The gap H between the inner end face of the tightening socket wrench and the outer end face of the axle housing shaft tube must be more than 10mm. This can effectively prevent the tightening socket wrench from not being screwed in properly or from damaging the threads at the end of the axle housing shaft tube during tightening.
[0048] In the description of this specification, references to terms such as "an embodiment," "preferred," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this utility model. Illustrative expressions of the above terms in this specification do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.
[0049] Based on the above description of the structure and principle, those skilled in the art should understand that this utility model is not limited to the specific embodiments described above. Improvements and substitutions based on this utility model using techniques known in the art all fall within the protection scope of this utility model and should be defined by the claims.
Claims
1. A tightening socket wrench for a circular locking nut with a thrust groove on an automobile wheel end assembly, comprising a tightening disc (1), characterized in that: It also includes a positioning mandrel (2) and a connecting post (3); The edge of the tightening disc (1) is bent forward to form a flange (11), and the inner side of the front end face of the flange (11) is provided with a limiting ring groove (12) that is compatible with the circular locking nut with a thrust groove, and a number of tightening teeth (13) are provided at intervals on the limiting ring groove (12). The positioning mandrel (2) is used to insert into the axle housing tube of the automobile wheel end assembly, and the rear end of the positioning mandrel (2) is connected to the front side of the tightening disc (1). The front end of the connecting column (3) is connected to the rear side of the tightening disc (1).
2. The tightening socket wrench for the circular locking nut with thrust groove in the automobile wheel end assembly according to claim 1, characterized in that: The tightening disc (1), positioning spindle (2) and connecting column (3) are an integral structure and are located on the same axis.
3. The tightening socket wrench for the circular locking nut with thrust groove in the automobile wheel end assembly according to claim 1, characterized in that: A reinforcing ring (15) is provided around the outer front end of the flange (11).
4. The tightening socket wrench for the circular locking nut with thrust groove in the automobile wheel end assembly according to claim 1, characterized in that: The front outer side of the flange (11) is provided with several positioning lines (14) along the axial direction.
5. The tightening socket wrench for the circular locking nut with thrust groove in the automobile wheel end assembly according to claim 4, characterized in that: The positioning line (14) and the tightening tooth (13) are set opposite to each other.
6. The tightening socket wrench for the circular locking nut with thrust groove in the automobile wheel end assembly according to claim 1, characterized in that: The flange (11) is provided with several weight reduction observation holes (16).
7. The tightening socket wrench for the circular locking nut with thrust groove in the automotive wheel end assembly according to claim 6, characterized in that: A weight reduction observation hole (16) is provided between each pair of adjacent tightening teeth (13), and the weight reduction observation hole (16) has a U-shaped opening groove structure.
8. The tightening socket wrench for the circular locking nut with thrust groove in the automobile wheel end assembly according to claim 1, characterized in that: The positioning mandrel (2) has a square cross section, and a weight reduction hole (21) is provided in the middle of the positioning mandrel (2) along the axial direction. A guide chamfer (22) is provided at the front edge of the positioning mandrel (2).
9. The tightening socket wrench for the circular locking nut with thrust groove in the automobile wheel end assembly according to claim 8, characterized in that: The connecting column (3) has an axially arranged exhaust hole (32) inside. The front end of the exhaust hole (32) is connected to the weight reduction hole (21), and the rear end opening of the exhaust hole (32) is provided with a square hole (31) for connecting the air gun.
10. The tightening socket wrench for the circular locking nut with thrust groove in the automobile wheel end assembly according to claim 1, characterized in that: The connecting post (3) is provided with an insertion hole (33) in the radial direction for the force-adding rod to pass through.