Boring tool for low-gear cone hub assembly

Abstract

The utility model discloses a low-gear cone hub assembly boring tool which comprises a bottom plate, an elastic expansion sleeve is embedded in the upper side face of the bottom plate, the upper end of the elastic expansion sleeve is higher than the bottom plate and used for tensioning a low-gear cone hub assembly from the inner side, a connecting shaft is vertically arranged in the center of the elastic expansion sleeve, and the lower end of the elastic expansion sleeve is connected with the bottom plate. The lower end of the connecting shaft penetrates through the elastic expansion sleeve and then is provided with a first assembly used for fixing the connecting shaft, the upper end of the connecting shaft is sleeved with a second assembly used for fixing the low-gear cone hub assembly after the upper end of the elastic expansion sleeve expands or not, and the bottom plate is further provided with a supporting assembly used for supporting the low-gear cone hub assembly. The low-gear cone hub assembly is simple in overall structure, the elastic expansion sleeve is arranged and expands through the second assembly, so that when the low-gear cone hub assembly is fixed, the whole part is expanded tightly from the inner side through the elastic expansion sleeve, damage to the outer teeth can be effectively avoided, and meanwhile firm fixing can be guaranteed.

Description

Technical Field

[0001] The utility model belongs to the technical field of automobile parts processing, and in particular relates to a low-gear tapered hub assembly boring tool. Background Art

[0002] like Figure 1 and Figure 2 As shown, the low gear cone hub assembly is mainly welded by a first component with multiple through holes and a second component with external teeth, wherein the multiple through holes on the first component are usually finished by boring after the overall welding is completed. In the prior art, the entire component is fixed by clamping the outer circle of the second component during boring. Since the second component is provided with external teeth, this fixing method is not only easy to damage the external teeth, but also easy to cause the problem of loose clamping due to the small clamping area. Utility Model Content

[0003] The utility model intends to provide a low-gear cone hub assembly boring tool, which realizes fixation during boring from the inner side of the low-gear cone hub assembly, thereby effectively avoiding damage to the outer teeth and ensuring firm fixation.

[0004] To this end, the technical solution adopted by the utility model is: a low-gear cone hub assembly boring tool,

[0005] It includes a base plate, on the upper side of which an elastic expansion sleeve is embedded, the upper end of the elastic expansion sleeve is higher than the base plate, and the upper end of the elastic expansion sleeve is used to tighten the low-gear cone hub assembly from the inside, a connecting shaft is vertically arranged at the center of the elastic expansion sleeve, the lower end of the connecting shaft is passed through the elastic expansion sleeve and a first component for fixing the connecting shaft is arranged, the upper end of the connecting shaft is sleeved with a second component for fixing the low-gear cone hub assembly after the upper end of the elastic expansion sleeve is expanded, and a supporting component for supporting the low-gear cone hub assembly is also arranged on the base plate.

[0006] As a preferred embodiment of the above scheme, the first component includes a fixing nut, the connecting shaft is provided with a circle of limiting protrusions located at the upper end of the elastic expansion sleeve, and the lower end of the connecting shaft is provided as a fixing thread section for tightening the fixing nut.

[0007] Further preferably, the second component includes a tensioning cone disk which is sleeved on the connecting shaft and can be moved to the inner side of the upper end of the elastic expansion sleeve, the elastic expansion sleeve is arranged as a U-shaped structure, the outer ring of the tensioning cone disk is arranged as a cone which is larger at the top and smaller at the bottom, the upper end of the connecting shaft is arranged with an adjusting nut for driving the tensioning cone disk to move up and down along the connecting shaft, the upper end of the connecting shaft is arranged with an adjusting thread section which matches the adjusting nut, a compression spring is arranged between the tensioning cone disk and the upper side surface of the lower end of the elastic expansion sleeve, and the upper side surface of the lower end of the elastic expansion sleeve is arranged with a compression hole for the compression spring to extend into.

[0008] Further preferably, the base plate is provided with a mounting hole for embedding the elastic expansion sleeve, the mounting hole is configured as a stepped hole which is smaller at the top and larger at the bottom, a fixing plate for fixing the elastic expansion sleeve is provided at the lower end of the mounting hole, a nut clearance groove is provided at a position on the fixing plate corresponding to the fixing nut, and the compression hole is coaxially arranged with a bolt hole for installing and fixing the bolt between the elastic expansion sleeve and the fixing plate.

[0009] Further preferably, the support assembly includes a support pad and a positioning pin both arranged on the base plate, the inner ring of the support pad is provided with a gear ring clearance groove whose diameter is larger than the gear ring diameter on the low gear cone hub assembly, and a boring clearance groove is provided on the support pad at a position corresponding to the position where a hole needs to be bored on the low gear cone hub assembly, and the upper end of the positioning pin passes through the support pad and leaves space for being inserted into the positioning hole on the low gear cone hub assembly.

[0010] Further preferably, the bottom plate is provided with a support pad block located outside the support pad and at the same height as the support pad, and the support pad block is also provided with a boring hole corresponding to the corresponding low-gear cone hub assembly.

[0011] The beneficial effects of the utility model are as follows: the overall structure is simple, an elastic expansion sleeve is provided, and the elastic expansion sleeve is expanded through the second component, so that when the low-gear cone hub assembly is fixed, the entire component is tightened from the inside through the elastic expansion sleeve, thereby effectively avoiding damage to the external teeth and ensuring firm fixation. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 The utility model discloses a fixed low-gear cone hub assembly (with a supporting pad).

[0013] Figure 2 The utility model discloses a second low-gear cone hub assembly that can be fixed.

[0014] Figure 3 It is a structural schematic diagram of the utility model.

[0015] Figure 4 It is a top view of the utility model.

[0016] Figure 5 It is a structural schematic diagram of the elastic expansion sleeve in the utility model.

[0017] Figure 6 It is a top view of the elastic expansion sleeve in the utility model. DETAILED DESCRIPTION

[0018] The present invention will be further described below by way of embodiments and in conjunction with the accompanying drawings:

[0019] like Figure 3-Figure 6As shown, a low-gear cone hub assembly boring tool is mainly composed of a base plate 1, an elastic expansion sleeve 2, a connecting shaft 3, a first component, a second component and a support component. The elastic expansion sleeve 2 is embedded on the upper side of the base plate 1, and the upper end of the elastic expansion sleeve 2 is higher than the base plate 1, so that the upper end of the elastic expansion sleeve 2 can expand the low-gear cone hub assembly from the inside. In order to facilitate the expansion of the elastic expansion sleeve, a connecting shaft 3 is vertically arranged in the center of the elastic expansion sleeve 2, and at the same time, the lower end of the connecting shaft 3 is provided with a first component for fixing the connecting shaft 3 after passing through the elastic expansion sleeve 2, and the upper end of the connecting shaft 3 is provided with a second component for fixing the low-gear cone hub assembly after the upper end of the elastic expansion sleeve 2 is expanded. In order to improve the support of the low-gear cone hub assembly, a support component for supporting the low-gear cone hub assembly is also provided on the base plate 1.

[0020] The specific structure of the first component includes a fixing nut 4, a circle of limiting protrusions located at the upper end of the elastic expansion sleeve is arranged on the connecting shaft 3, and the lower end of the connecting shaft 3 is arranged as a fixing thread section for tightening the fixing nut 4, and a nut clearance groove for conveniently screwing in the fixing nut is arranged at the position corresponding to the fixing nut on the lower side of the bottom plate. During installation, after the lower end of the connecting shaft passes through the elastic expansion sleeve, the fixing nut is tightened on the fixing thread section, that is, the lower end of the connecting shaft is fixed on the elastic expansion sleeve through the joint action of the fixing nut and the limiting protrusion.

[0021] The specific structure of the second component includes a tension cone 5 which is sleeved on the connecting shaft 3 and can move to the inner side of the upper end of the elastic expansion sleeve 2. In order to facilitate the expansion of the elastic expansion sleeve, the elastic expansion sleeve 2 is set to a U-shaped structure, and the outer ring of the tension cone 5 is set to a cone with a larger upper part and a smaller lower part. When the tension cone moves downward, the elastic expansion sleeve can be expanded outward, and when the tension cone moves upward, the elastic expansion sleeve can be retracted inward. In order to achieve the movement of the tension cone and the fixation after the movement, an adjustment nut 6 is provided at the upper end of the connecting shaft 3 for driving the tension cone 5 to move up and down along the connecting shaft. At this time, the upper end of the connecting shaft 3 is set to an adjustment thread section matching the adjustment nut 6, and a compression spring 7 is provided between the tension cone 5 and the upper side surface of the lower end of the elastic expansion sleeve 2, and a compression hole for the compression spring 7 to extend into is provided on the upper side surface of the lower end of the elastic expansion sleeve 2. The tension cone is pushed to move up and down along the connecting shaft by rotating the adjustment nut, and at the same time, the adjustment nut does not move downward by itself due to the effect of the compression spring.

[0022] To facilitate the fixation of the elastic expansion sleeve, a mounting hole for embedding the elastic expansion sleeve is provided on the base plate 1, and the mounting hole is arranged as a stepped hole which is smaller at the top and larger at the bottom. A fixing plate 8 for fixing the elastic expansion sleeve is arranged at the lower end of the mounting hole, and a nut clearance groove is correspondingly arranged on the fixing plate, and the compression hole is coaxially arranged with the bolt hole for installing and fixing the bolts between the elastic expansion sleeve and the fixing plate.

[0023] The specific structure of the support assembly includes a support pad 9 and a positioning pin 10, both of which are arranged on the base plate 1, and the inner ring of the support pad 9 is provided with a gear ring clearance groove whose diameter is larger than the gear ring diameter on the low-gear cone hub assembly, and a boring clearance groove is provided on the support pad 9 at a position corresponding to the position where a hole needs to be bored on the low-gear cone hub assembly, and the upper end of the positioning pin 10 passes through the support pad 9 and leaves space for being inserted into the positioning hole on the low-gear cone hub assembly.

[0024] In order to support different types of low-gear cone hub assemblies, a support pad 11 is provided on the base plate 1 and is located outside the support pad and at the same height as the support pad. The number and position of the support pads are set according to needs. At this time, the boring hole clearance groove can be set on the support pad 11.

[0025] In order to facilitate the expansion and retraction of the elastic expansion sleeve, the upper end of the elastic expansion sleeve is composed of a plurality of arcs arranged at intervals. In the present embodiment, 8 arcs are arranged.

Claims

1. A low gear cone hub assembly boring tool, characterized in that: The invention comprises a base plate (1), an elastic expansion sleeve (2) is embedded on the upper side surface of the base plate (1), the upper end of the elastic expansion sleeve (2) is higher than the base plate (1), and the upper end of the elastic expansion sleeve (2) is used to expand the low-gear cone hub assembly from the inside, a connecting shaft (3) is vertically arranged at the center of the elastic expansion sleeve (2), the lower end of the connecting shaft (3) is provided with a first component for fixing the connecting shaft (3) after passing through the elastic expansion sleeve (2), the upper end of the connecting shaft (3) is provided with a second component for fixing the low-gear cone hub assembly after the upper end of the elastic expansion sleeve (2) is expanded, and a supporting component for supporting the low-gear cone hub assembly is also arranged on the base plate (1).

2. The low gear cone hub assembly boring tool according to claim 1, characterized in that: The first component comprises a fixing nut (4), the connecting shaft (3) is provided with a circle of limiting protrusions located at the upper end of the elastic expansion sleeve, and the lower end of the connecting shaft (3) is provided as a fixing thread section for tightening the fixing nut (4).

3. The low gear cone hub assembly boring tool according to claim 1, characterized in that: The second component comprises a tensioning cone disk (5) which is sleeved on the connecting shaft (3) and can be moved into the inner side of the upper end of the elastic expansion sleeve (2); the elastic expansion sleeve (2) is arranged as a U-shaped structure; the outer ring of the tensioning cone disk (5) is arranged as a cone which is larger at the top and smaller at the bottom; the upper end of the connecting shaft (3) is arranged with an adjusting nut (6) for driving the tensioning cone disk (5) to move up and down along the connecting shaft; the upper end of the connecting shaft (3) is arranged with an adjusting thread section which matches the adjusting nut (6); a compression spring (7) is arranged between the tensioning cone disk (5) and the upper side surface of the lower end of the elastic expansion sleeve (2); and the upper side surface of the lower end of the elastic expansion sleeve (2) is arranged with a compression hole for the compression spring (7) to extend into.

4. The low gear cone hub assembly boring tool according to claim 1, characterized in that: The bottom plate (1) is provided with a mounting hole for embedding the elastic expansion sleeve, the mounting hole is configured as a stepped hole that is smaller at the top and larger at the bottom, and a fixing plate (8) for fixing the elastic expansion sleeve is provided at the lower end of the mounting hole.

5. The low gear cone hub assembly boring tool according to claim 1, characterized in that: The support assembly comprises a support pad (9) and a positioning pin (10) both of which are arranged on the base plate (1); the inner ring of the support pad (9) is provided with a gear ring clearance groove with a diameter larger than the gear ring diameter on the low gear cone hub assembly; a boring clearance groove is provided on the support pad (9) at a position corresponding to a hole required to be bored on the low gear cone hub assembly; and the upper end of the positioning pin (10) passes through the support pad (9) and has space left for being inserted into the positioning hole on the low gear cone hub assembly.

6. The low gear cone hub assembly boring tool according to claim 5, characterized in that: The bottom plate (1) is provided with a support pad (11) located outside the support pad and at the same height as the support pad. The support pad (11) is also provided with a boring hole corresponding to the corresponding low-gear cone hub assembly.

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