Hub bearing bolt press-fitting bottom die

Abstract

The utility model relates to the technical field of hub bearing production, and discloses a hub bearing bolt press-fitting bottom die which comprises a bottom die body arranged on a workbench, and a center counter bore and a plurality of bolt receding grooves evenly distributed around the circumference of the center counter bore are formed in the bottom die body. The bolt receding groove is arranged in a kidney shape. And a central positioning bushing is sleeved in the central counter bore. The detachable center positioning bush and the kidney-shaped bolt receding groove are arranged on the bottom die body, so that the press-fitting requirements of hub bearing accessories of various sizes and specifications can be met, the universality of the press-fitting bottom die can be improved, the number of bottom dies can be greatly reduced, and the production cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of hub bearing production, in particular to a hub bearing bolt press-fit bottom die. Background Art

[0002] Wheel hub bearings are components used in automobile axles to bear weight and provide precise guidance for the rotation of the wheel hub. They bear both axial and radial loads and are an important part of the load-bearing and rotation of the automobile. Generally, several bolts need to be pressed into the inner or outer ring of the wheel hub bearing by press-fitting. When press-fitting the bolts, a press-fitting bottom die is required. The existing press-fitting bottom die is as shown in the attached manual. Figure 3 As shown, a center positioning hole is provided in the middle, and multiple bolt holes are provided on the outside of the center positioning hole. However, the existing press-fit bottom molds are matched one by one with the corresponding wheel hub bearing accessories. The versatility of the press-fit bottom molds is poor, and the number of bottom molds is large, resulting in high cost. Utility Model Content

[0003] The purpose of the utility model is to provide a wheel hub bearing bolt press-fitting bottom die, which can adapt to the press-fitting requirements of wheel hub bearing accessories of various sizes and specifications by arranging a detachable center positioning bushing and a waist-shaped bolt clearance groove on the bottom die body, thereby improving the versatility of the press-fitting bottom die, greatly reducing the number of bottom dies, and reducing production costs.

[0004] The above technical objectives of the utility model are achieved through the following technical solutions:

[0005] A wheel hub bearing bolt press-fit bottom die comprises a bottom die body arranged on a workbench, wherein the bottom die body is formed with a central countersunk hole and a plurality of bolt clearance grooves evenly distributed about the circumference of the central countersunk hole; the bolt clearance grooves are waist-shaped; a central positioning bushing is sleeved in the central countersunk hole.

[0006] Through the above technical scheme, the wheel hub bearing accessories to be pressed are inserted into the center positioning sleeve for center positioning, and then the bolts to be pressed are inserted into the corresponding bolt pressing holes of the wheel hub bearing accessories, and the lower ends of the bolts are inserted into the corresponding bolt clearance grooves. Then the upper pressure ring moves downward to press down multiple bolts to be pressed, thereby completing the press-fitting work; since the wheel hub bearing accessories have various specifications, the replacement of the center positioning sleeve can match the wheel hub bearing accessories of the corresponding specifications, and the waist-shaped setting of the bolt clearance groove can adapt to the placement of bolts in different positions.

[0007] The utility model is further configured as follows: an annular groove is formed on the outer wall of the center positioning bushing;

[0008] A threaded hole communicating with the central countersunk hole is formed on the bottom mold body, a positioning screw is screwed on the threaded hole, and the end of the positioning screw extends into the annular groove.

[0009] The positioning screw can prevent the center positioning bushing from moving upward, thereby preventing it from automatically separating from the bottom mold body when the wheel hub bearing accessories are disassembled; the center positioning bushing can be taken out upward by turning the positioning screw to loosen it.

[0010] The utility model is further configured as follows: the upper end surface of the center positioning bushing is not higher than the upper end surface of the center countersunk hole, which can prevent the center positioning bushing from being deformed by force when the bolt is pressed.

[0011] The utility model is further configured as follows: a second countersunk hole is formed on the bottom surface of the central countersunk hole, and the inner diameter of the second countersunk hole is smaller than the inner diameter of the central positioning bushing.

[0012] Through the above technical solution, the corresponding tool can be easily inserted under the center positioning bushing, thereby facilitating the removal of the center positioning bushing.

[0013] The utility model is further configured as follows: the lower end of the bottom die body is formed with an annular recessed groove with a lower opening, and the bottom surface of the annular recessed groove is formed with a plurality of through holes that are arranged one by one in communication with the bolt clearance grooves; a lifting ring is sleeved in the annular recessed groove, and a plurality of ejector rods are fixed on the lifting ring, and the ejector rods are inserted into the corresponding through holes; the lifting ring is fixed to the end of the piston rod of the cylinder, and the cylinder is fixed in the bottom die body. The cylinder is controlled by a controller, and the controller simultaneously controls the lifting and lowering of the pressure head or the pressure ring. When the press-fitting is completed, the controller controls the piston rod of the cylinder to contract and drive the lifting ring to move upward, and the lifting ring drives the ejector rod to move upward, and the ejector rod presses on the bottom of the press-fitted bolt to push the hub bearing accessory up for a period of time, which is convenient for removing the hub bearing accessory.

[0014] The utility model is further configured as follows: the through hole is arranged at the middle position of the bolt clearance groove, which can ensure the ejection work of the bolt extending into the bolt clearance hole.

[0015] The outstanding effects of the utility model are:

[0016] Compared with the existing technology, by arranging a removable center positioning bushing and a waist-shaped bolt clearance groove on the bottom mold body, it can adapt to the pressing requirements of wheel hub bearing accessories of various sizes and specifications, improve the versatility of the press-fitting bottom mold, greatly reduce the number of bottom molds, and reduce production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the bottom die for press-fitting the wheel hub bearing;

[0018] Figure 2 for Figure 1 About the cross-sectional view of AA;

[0019] Figure 3 It is a structural schematic diagram of the bottom mold in the prior art.

[0020] Reference numerals: 10, workbench;

[0021] 20, bottom mold body; 201, center countersunk hole; 202, bolt clearance groove; 203, threaded hole; 204, second countersunk hole; 205, annular countersunk groove; 206, through hole;

[0022] 30. Center positioning bushing; 301. Annular groove; 31. Positioning screw;

[0023] 40. lifting ring; 41. ejector rod; 42. cylinder;

[0024] 90. Wheel hub bearing accessories; 91. Bolts pressed onto the wheel hub bearing. DETAILED DESCRIPTION

[0025] The following is a further detailed description of the specific implementation of the present invention in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0026] The following references Figure 1 to Figure 2 The utility model is described as follows:

[0027] A wheel hub bearing bolt press-fit bottom die comprises a bottom die body 20 arranged on a workbench 10, the bottom die body 20 is formed with a center countersunk hole 201 and a plurality of bolt clearance grooves 202 evenly distributed around the circumference of the center countersunk hole 201; the bolt clearance grooves 202 are waist-shaped and can adapt to the clearance work of press-fit bolts in different positions; a center positioning bushing 30 is sleeved in the center countersunk hole 201; the center positioning bushing 30 has various sizes, its outer diameter is matched with the aperture clearance of the center countersunk hole, and its inner diameter is large or small to match wheel hub bearings of different specifications.

[0028] The wheel hub bearing to be pressed is inserted into the center positioning sleeve 30 for center positioning, and then the bolts to be pressed are inserted into the corresponding bolt pressing holes of the wheel hub bearing, and the lower ends of the bolts are inserted into the corresponding bolt clearance grooves. Then the upper pressure ring moves downward to press down multiple bolts to be pressed, thereby completing the press-fitting work. Since the wheel hub bearing accessories have various specifications, the replacement of the center positioning sleeve 30 can match the wheel hub bearing accessories of the corresponding specifications. At the same time, the waist-shaped setting of the bolt clearance groove can adapt to the placement of bolts in different positions.

[0029] An annular groove 301 is formed on the outer wall of the center positioning bushing 30;

[0030] The bottom mold body 20 is formed with a threaded hole 203 communicating with the central countersunk hole 201 , and a positioning screw 31 is screwed on the threaded hole 203 , and the end of the positioning screw 31 extends into the annular groove 301 .

[0031] The positioning screw can prevent the center positioning bushing 30 from moving upward, thereby preventing it from automatically separating from the bottom mold body when the wheel hub bearing accessories are disassembled; the center positioning bushing 30 can be taken out upward by turning the positioning screw to loosen it.

[0032] The upper end surface of the center positioning bushing 30 is not higher than the upper end surface of the center counterbore 201, which can prevent the center positioning bushing 30 from being deformed by force when the bolt is pressed.

[0033] A second countersunk hole 204 is formed on the bottom surface of the central countersunk hole 201 . The inner diameter of the second countersunk hole 204 is smaller than the inner diameter of the central positioning bushing 30 .

[0034] The corresponding tool can be conveniently inserted under the center positioning bushing 30 , thereby facilitating the removal of the center positioning bushing 30 .

[0035] The lower end of the bottom mold body 20 is formed with an annular groove 205 with an opening at the lower side, and a plurality of through holes 206 are formed on the bottom surface of the annular groove 205, which are connected to the bolt clearance groove 202 one by one; a lifting ring 40 is sleeved in the annular groove 205, and a plurality of ejector rods 41 are fixed on the lifting ring 40, and the ejector rods 41 are inserted into the corresponding through holes 206; the lifting ring 40 is fixed to the piston rod end of the cylinder 42, and the cylinder 42 is fixed in the bottom mold body 20. The piston rod of the cylinder contracts and drives the lifting ring to move upward, and the lifting ring drives the ejector rod to move upward. The ejector rod pushes the bottom of the press-fitted bolt to push the wheel hub bearing accessory for a period of time, which is convenient for the removal of the wheel hub bearing accessory. The through hole 206 is set in the middle position of the bolt clearance groove 202. When the ejector rod moves upward, a part of the top of the ejector rod can contact the bottom of the press-fitted bolt, which can ensure the ejection of the bolt inserted into the bolt clearance hole.

[0036] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications of the above assumptions should also be regarded as the protection scope of the present invention.

Claims

1. A wheel hub bearing bolt press-fit bottom die, comprising a bottom die body (20) disposed on a workbench (10), characterized in that: The bottom mold body (20) is formed with a central countersunk hole (201) and a plurality of bolt clearance grooves (202) evenly distributed around the circumference of the central countersunk hole (201); the bolt clearance grooves (202) are arranged in a waist shape; and a central positioning bushing (30) is sleeved in the central countersunk hole (201).

2. A wheel hub bearing bolt press-fit bottom die according to claim 1, characterized in that: An annular groove (301) is formed on the outer wall of the center positioning bushing (30); A threaded hole (203) communicating with the central countersunk hole (201) is formed on the bottom mold body (20), a positioning screw (31) is screwed on the threaded hole (203), and the end of the positioning screw (31) extends into the annular groove (301).

3. A wheel hub bearing bolt press-fit bottom die according to claim 1, characterized in that: The upper end surface of the center positioning bushing (30) is not higher than the upper end surface of the center counterbore (201).

4. A wheel hub bearing bolt press-fit bottom die according to claim 1, characterized in that: A second countersunk hole (204) is formed on the bottom surface of the central countersunk hole (201), and the inner diameter of the second countersunk hole (204) is smaller than the inner diameter of the central positioning bushing (30).

5. The wheel hub bearing bolt press-fit bottom die according to claim 1, characterized in that: The lower end of the bottom mold body (20) is formed with an annular recessed groove (205) with a lower opening, and the bottom surface of the annular recessed groove (205) is formed with a plurality of through holes (206) which are arranged to communicate with the bolt clearance grooves (202) one by one; a lifting ring (40) is sleeved in the annular recessed groove (205), and a plurality of push rods (41) are fixed on the lifting ring (40), and the push rods (41) are inserted into the corresponding through holes (206); the lifting ring (40) is fixed to the piston rod end of the cylinder (42), and the cylinder (42) is fixed in the bottom mold body (20).

6. A wheel hub bearing bolt press-fit bottom die according to claim 5, characterized in that: The through hole (206) is arranged at the middle position of the bolt clearance groove (202).

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