Novel universal stud press-fitting mold for hub bearing

Abstract

The utility model relates to the technical field of bearing production, and discloses a novel universal stud press-fitting die for hub bearings, which comprises an outer die holder and an inner die holder which are arranged in a split manner, a round counter bore is formed in the outer die holder, and the inner die holder is mounted in the round counter bore; the inner wall of the circular counter bore and the outer wall of the inner die holder form a circular ring groove; a bearing centering hole with an opening in the upper side is formed in the inner die base. The bearing centering holes of the inner die holder have various sizes and specifications; a positioning mandrel is formed at the end part of the inner die holder; a positioning center hole is formed in the bottom face of the round counter bore. A single positioning hole of an existing press-fitting die is replaced by the full-circle annular groove, so that mounting work of a hub bearing and a bolt can be facilitated, and the press-fitting efficiency of the bolt is improved; meanwhile, the device can adapt to press-fitting work of hub bearings with different bolt numbers, the universality and practicability of the press-fitting die are improved, and the production cost can be reduced; and the outer die holder is universal, and the inner die holder is replaced, so that the press fitting work of hub bearings with different spigot specifications can be met.

Description

Technical Field

[0001] This utility model relates to the field of bearing manufacturing technology, and in particular to a novel universal mold for press-fitting studs for wheel hub bearings. Background Technology

[0002] The current hub axle 90 is as per the instruction manual. Figure 4 As described, multiple bolts 91 are fixed on it by press fitting. However, in actual production, although the diameter θ of the pitch circle where the multiple bolts are located is equal, the number of bolts 91 varies from 4 to 8. The existing wheel hub bearing press fitting mold is shown in the attached instruction manual. Figure 5 The aforementioned includes a mold body 80, which has positioning holes 81 that mate with the stop 92 of the wheel hub bearing and bolt positioning holes corresponding to the bolts 91. Existing press-fit molds require the holes on the wheel hub bearing to be aligned with the positioning holes 81 before the bolts can be inserted, even though the installation process is not complex, it is time-consuming and thus affects press-fit efficiency. Furthermore, due to the varying number of bolts, each product requires a separate press-fit mold, resulting in higher production costs. In actual production, the following situation also arises: wheel hub bearings have various stop diameters or shapes, requiring the adaptation of multiple different press-fit molds. Utility Model Content

[0003] The purpose of this utility model is to provide a new type of universal die for press-fitting wheel hub bearings. By replacing the single positioning hole of the existing die with a circular groove, the installation of wheel hub bearings and bolts can be facilitated, thereby improving the bolt press-fitting efficiency. At the same time, it can be adapted to the press-fitting of wheel hub bearings with different numbers of bolts, improving the versatility and practicality of the die and reducing production costs.

[0004] By using separate outer and inner mold bases, and by making the outer mold base universal while allowing the inner mold base to be replaced, the pressing work of wheel hub bearings with different stop specifications can be met, and the mold cost can also be reduced to a certain extent.

[0005] The above-mentioned technical objective of this utility model is achieved through the following technical solution:

[0006] A novel universal die for press-fitting studs for wheel hub bearings includes a separate outer die seat and an inner die seat. The outer die seat is formed with a countersunk hole, and the inner die seat is installed in the countersunk hole. The inner wall of the countersunk hole and the outer wall of the inner die seat form an annular groove.

[0007] The inner mold base is provided with an upper side opening bearing centering hole. During pressing, the hub bearing is inserted into the bearing centering hole for centering, and then the bolts needed to be pressed are inserted into the corresponding bolt holes of the hub bearing, and the outer diameter of the bolt is matched with the width of the circular groove, so that the circular groove can guide the bolt to a certain extent, and the circular groove is arranged in a whole circle, so that the position requirement of the wheel shaft bearing installation is not high, and the bolt can be inserted into the circular groove as long as the centering is performed, thereby facilitating the installation of the wheel shaft bearing and improving the pressing efficiency. Meanwhile, the pressing work of the hub bearing with different numbers of bolts can be matched, and the universality and practicality of the pressing die are improved.

[0008] The upper end faces of the outer mold base and the inner mold base are arranged at the same height, and after the hub bearing is installed, the inner and outer sides of the bolt are supported, so that the deformation influence of the pressing bolt on the hub bearing is reduced.

[0009] The upper end portion of the circular counterbore is provided with a first chamfer, and the outer wall of the inner mold base is provided with a second chamfer at the upper end, and the first chamfer and the second chamfer form a guide taper groove. The guide taper groove can guide the insertion of the bolt, and can also avoid interference between the bolt and the die.

[0010] The bearing centering hole of the inner mold base has multiple sizes;

[0011] The end portion of the inner mold base is provided with a positioning mandrel, the bottom surface of the circular counterbore is provided with a positioning center hole, and the positioning mandrel is inserted into the positioning center hole.

[0012] Since the flange of the hub bearing has multiple sizes, the pitch circle diameter of the bolt is unchanged, and therefore the positioning center hole also needs to have multiple sizes, and the hole diameter of the positioning center hole is changed, so that the inner mold base also has multiple sizes. In order to improve the universality, the inner mold base only needs to be replaced, so that the cost is reduced.

[0013] The outer mold base is provided with an inner mold base jacking mechanism, the inner mold base jacking mechanism comprises a jacking ball which can move radially, and the lower end of the positioning mandrel is provided with a conical hemispherical top, and the ball center of the jacking ball is lower than the lowermost end of the conical hemispherical top.

[0014] When the inner mold base needs to be replaced, the jacking ball moves radially and contacts the conical hemispherical top to push the conical hemispherical top upward, so that the inner mold base is jacked upward, thereby facilitating the removal of the inner mold base and facilitating the replacement of the inner mold base.

[0015] The outer mold base is provided with a lateral hole which penetrates the positioning center hole in the radial direction, and the inner diameter of the lateral hole is matched with the outer diameter of the jacking ball in a clearance fit.

[0016] The inner mold base jacking mechanism comprises an inner threaded column sleeve inserted into a lateral hole and fixed, an inner threaded column screwed into the inner threaded column sleeve, a push-pull rod fixed to the inner end of the inner threaded column, and a jacking ball rotationally connected to the inner end of the push-pull rod.

[0017] The jacking ball is moved by rotating the inner threaded column, moving the push-pull rod and the jacking ball inward, and moving the jacking ball outward to reset when jacking is completed.

[0018] The jacking ball is moved by rotating the inner threaded column, moving the push-pull rod and the jacking ball inward, and moving the jacking ball outward to reset when jacking is completed.

[0019] The jacking ball is moved by rotating the inner threaded column, moving the push-pull rod and the jacking ball inward, and moving the jacking ball outward to reset when jacking is completed.

[0020] The jacking ball is moved by rotating the inner threaded column, moving the push-pull rod and the jacking ball inward, and moving the jacking ball outward to reset when jacking is completed.

[0021] Compared with the prior art, the single positioning hole of the existing press-fitting mold is replaced by the whole circular annular groove, which facilitates the installation of the hub bearing and the bolt, thereby improving the press-fitting efficiency of the bolt; at the same time, the press-fitting work of the hub bearing with different numbers of bolts can be adapted, the versatility and practicality of the press-fitting mold are improved, and the production cost is reduced.

[0022] The outer mold base and the inner mold base are separately arranged, the outer mold base is universal, and the inner mold base is replaceable, so that the press-fitting work of the hub bearing with different flared mouth specifications can be met, and the mold cost can be reduced to a certain extent.

[0023] The inner mold base jacking mechanism facilitates the replacement of the inner mold base. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 The structure of the utility model is shown in the figure;

[0025] Figure 2 The structure of the utility model is shown in the figure; Figure 1 The local enlarged view of A is shown in the figure;

[0026] Figure 3 The assembly of the utility model and the hub bearing is shown in the figure;

[0027] Figure 4 The structure of the hub bearing related to the utility model is shown in the figure;

[0028] Figure 5The existing press-fitting mold and the assembly of the hub bearing are shown in the figure.

[0029] Reference signs: 1, outer mold base; 101, round counterbore; 102, circular groove; 103, first chamfer; 104, guide cone groove; 105, positioning center hole; 106, lateral hole;

[0030] 2, inner mold base; 201, bearing centering hole; 202, second chamfer; 203, positioning mandrel; 204, conical hemispherical top;

[0031] 3, inner mold base lifting mechanism; 301, lifting ball; 302, internally threaded column sleeve; 303, stud; 304, push-pull rod; 306, mounting counterbore; 307, thrust bearing; 308, bearing cover; 309, protruding ring;

[0032] 80, mold body; 81, positioning hole;

[0033] 90, hub bearing; 91, bolt; 92, stop. DETAILED DESCRIPTION

[0034] The specific embodiments of the present application will be further described in detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate the present application, but are not used to limit the scope of the present application.

[0035] The following references Figures 1 to 3 The embodiments of the present application are described as follows:

[0036] A new stud press-fitting universal mold for hub bearings, as shown in Figure 1 , Figure 3 The outer mold base 1 is formed with a round counterbore 101, and the inner mold base 2 is installed in the round counterbore 101; the inner wall of the round counterbore 101 and the outer wall of the inner mold base 2 form a circular groove 102.

[0037] The inner mold base 2 is formed with an upper side opening bearing centering hole 201. During press-fitting, the hub bearing 90 is inserted into the bearing centering hole for centering positioning, and then the bolt 91 that needs to be press-fitted is inserted into the corresponding bolt hole of the hub bearing 90, and the outer diameter of the bolt 91 matches the width of the circular groove, so that the circular groove can play a certain guiding role for the bolt, and the circular groove is arranged in a whole circle, so that the position requirement for the installation of the hub bearing is not high, and as long as the centering positioning is performed, the bolt can be inserted into the circular groove, thereby facilitating the installation of the hub bearing and improving the press-fitting efficiency; at the same time, it can also match the press-fitting work of hub bearings with different numbers of bolts, thereby improving the universality and practicality of the press-fitting mold.

[0038] The upper end surface of the outer die seat 1 and the upper end surface of the inner die seat 2 are arranged at the same height, and after the hub bearing is installed, the inner and outer sides of the bolts are supported, so that the deformation influence of the bolt pressing on the hub bearing can be reduced.

[0039] As shown in Figure 1 The upper end portion of the round counterbore 101 is formed with a first chamfer 103, and the outer wall upper end of the inner die seat 2 is formed with a second chamfer 202, and the first chamfer 103 and the second chamfer 202 form a guide taper groove 104. The guide taper groove can guide the insertion of the bolt, and can also avoid interference between the bolt and the mold.

[0040] The bearing centering hole 201 of the inner die seat 2 has various sizes;

[0041] As shown in Figure 1 The end of the inner die seat 2 is formed with a positioning mandrel 203; the bottom surface of the round counterbore 101 is formed with a positioning center hole 105; the positioning mandrel 203 is inserted into the positioning center hole 105.

[0042] Since the stop 92 on the flange of the hub bearing has various specifications, the pitch circle diameter of the bolt is unchanged, so the positioning center hole also needs to have various specifications, and the hole diameter of the positioning center hole is changed, so the inner die seat also has various specifications. In order to improve the universality, only the inner die seat needs to be replaced, thereby reducing the cost.

[0043] As shown in Figure 1 The outer die seat 1 is provided with an inner die seat jacking mechanism 3; the inner die seat jacking mechanism 3 includes a jacking ball 301 that can move radially, and the lower end of the positioning mandrel 203 is formed with a conical hemispherical top 204, and the center of the jacking ball 301 is lower than the lowermost end of the conical hemispherical top 204.

[0044] When the inner die seat needs to be replaced, the jacking ball moves radially and contacts the conical hemispherical top to push the conical hemispherical top upward, thereby jacking the inner die seat upward, so that the inner die seat can be easily taken out and replaced.

[0045] As shown in Figure 1 , Figure 2 The outer die seat 1 is formed with a lateral hole 106 that penetrates the positioning center hole 105 radially, and the inner diameter of the lateral hole 106 is gap-fitted with the outer diameter of the jacking ball 301;

[0046] The inner die seat jacking mechanism 3 includes an inner threaded column sleeve 302 that is inserted and fixed in the lateral hole 106, the inner threaded column sleeve 302 is internally screwed with a stud 303, the inner end of the stud 303 is fixed with a push-pull rod 304, and the jacking ball 301 is rotationally connected to the inner end of the push-pull rod 304.

[0047] The stud is rotated by a tool, the stud moves inward to drive the push-pull rod to move inward, the push-pull rod drives the lifting ball to move, when the positioning mandrel needs to be lifted, the lifting ball moves inward, when the lifting is completed, the lifting ball moves outward to reset.

[0048] As shown in Figure 2 The lifting ball 301 is internally formed with a mounting counterbore 306, the mounting counterbore 306 is internally sleeved with a thrust bearing 307, the push-pull rod 304 is inserted into the thrust bearing 307 through the end of a bearing cover 308; the end of the push-pull rod 304 is formed with a convex ring 309, the convex ring 309 is arranged between the bearing cover 308 and the thrust bearing 307, and the bearing cover 308 is fixed at the mouth of the mounting counterbore 306.

[0049] The cooperation of the thrust bearing and the push-pull rod can reduce the resistance when the stud rotates while realizing the movement of the lifting ball, and the cooperation of the bearing cover and the convex ring can ensure that the push-pull rod can drive the lifting ball to move back when the push-pull rod moves back.

[0050] The above is only the preferred embodiment of the present application, and it should be pointed out that for ordinary skilled in the art, without departing from the technical principles of the present application, a number of improvements and modifications can be made, and the above-mentioned improvements and modifications should be regarded as the protection scope of the present application.

Claims

1. A novel universal die for press-fitting studs in wheel hub bearings, characterized in that: It includes a separate outer mold base (1) and an inner mold base (2). The outer mold base (1) is formed with a round countersunk hole (101), and the inner mold base (2) is installed in the round countersunk hole (101). The inner wall of the round countersunk hole (101) and the outer wall of the inner mold base (2) form a circular groove (102).

2. The novel universal die for press-fitting studs for wheel hub bearings according to claim 1, characterized in that: The upper surface of the outer mold base (1) and the upper surface of the inner mold base (2) are set at the same height.

3. The novel universal die for press-fitting studs for wheel hub bearings according to claim 1, characterized in that: The upper end of the countersunk hole (101) is formed with a first chamfer (103), and the upper end of the outer wall of the inner mold base (2) is formed with a second chamfer (202). The first chamfer (103) and the second chamfer (202) form a guide cone groove (104).

4. The novel universal die for press-fitting studs for wheel hub bearings according to claim 1, characterized in that: The bearing centering hole (201) of the inner mold base (2) has various sizes and specifications; The end of the inner mold base (2) is formed with a positioning mandrel (203); the bottom surface of the countersunk hole (101) is formed with a positioning center hole (105); the positioning mandrel (203) is inserted into the positioning center hole (105).

5. The novel universal die for press-fitting studs for wheel hub bearings according to claim 4, characterized in that: The outer mold base (1) is provided with an inner mold base lifting mechanism (3); the inner mold base lifting mechanism (3) includes a lifting ball (301) that can move radially, and the lower end of the positioning mandrel (203) is formed with a conical hemispherical dome (204), and the center of the lifting ball (301) is set below the lowest end of the conical hemispherical dome (204).

6. The novel universal die for press-fitting studs for wheel hub bearings according to claim 5, characterized in that: The outer mold base (1) has a lateral hole (106) formed inside, which is radially through the positioning center hole (105). The inner diameter of the lateral hole (106) is fitted with the outer diameter of the lifting ball (301) with a clearance. The inner mold base lifting mechanism (3) includes an internal threaded sleeve (302) inserted and fixed in the side hole (106), a stud (303) screwed into the internal threaded sleeve (302), a push-pull rod (304) fixed to the inner end of the stud (303), and the lifting ball (301) rotatably connected to the inner end of the push-pull rod (304).

7. A novel universal die for press-fitting studs for wheel hub bearings according to claim 6, characterized in that: The lifting ball (301) has a countersunk hole (306) formed inside, and a thrust bearing (307) is sleeved inside the countersunk hole (306). The end of the push-pull rod (304) passing through the bearing cover (308) is inserted into the thrust bearing (307). The end of the push-pull rod (304) has a protruding ring (309) formed inside, and the protruding ring (309) is placed between the bearing cover (308) and the thrust bearing (307). The bearing cover (308) is fixed to the opening of the countersunk hole (306).

Images