A rolling bearing press-fitting tooling

Abstract

A rolling bearing press-fitting tooling belongs to the technical field of assembly tooling. The upper end of the fixture body is connected to the lower ends of multiple struts, the upper ends of the multiple struts are fixedly connected to the top plate, a central hole is provided in the middle of the top plate, a fixed sleeve is coaxially sleeved outside the cylinder body of the hydraulic cylinder, and the fixed sleeve is coaxially fixed in the central hole. The hydraulic cylinder is vertically arranged, and the lower end of the piston rod of the hydraulic cylinder is cooperatively arranged with the top nail, and the lower end of the top nail is cooperatively arranged with the middle part of the pressing cover. The pressing cover is placed on the upper end face of the inner ring of the bearing to be press-fitted, and a jack corresponding to the pressing cover is provided in the middle of the fixture body. The present invention facilitates the replacement of the hydraulic cylinder, enables production to be no longer limited by the length of the shaft body and the magnitude of the pressing force required by the bearing, and is applicable to the production requirements of shaft bodies with different lengths and different bearing pressing forces; reduces the axial distance of the reverse torque transmission of the torque multiplier, and reduces the risk of the shaft body itself bearing the reverse torque; can reduce the handling of the shaft body between the fixture bodies and reduce the risk of the shaft body being bruised by collision.

Description

Technical Field

[0001] The present invention relates to a rolling bearing press-fitting tooling, belonging to the technical field of assembly tooling. Background Art

[0002] Currently, a press is generally used to press-fit a rolling bearing onto a shaft body. However, when the shaft body is relatively long, it is often difficult to find a press that meets both the dimensional requirements and the pressing force requirements.

[0003] In addition, after the rolling bearing is pressed onto the shaft body, in order to prevent the rolling bearing from moving axially on the shaft body during use, it is necessary to remove the shaft body with the pressed bearing from the press and then use a locking nut to fix the rolling bearing on the shaft body. The movement often causes damage to the shaft body. At the same time, the locking torque requirements for the locking nut are relatively large. The current locking method cannot overcome the reverse torque generated when using a torque multiplier to tighten the locking nut, resulting in a poor locking effect. Summary of the Invention

[0004] To solve the problems in the background art, the present invention provides a rolling bearing press-fitting tooling.

[0005] To achieve the above object, the present invention adopts the following technical solution: A rolling bearing press-fitting tooling includes a fixture body and a bearing press-fitting mechanism. The bearing press-fitting mechanism includes a support column, a hydraulic cylinder, a fixed sleeve, a top nail, a pressing cover, and a top plate. The upper end of the fixture body is connected to the lower ends of a plurality of support columns, the upper ends of the plurality of support columns are fixedly connected to the top plate, a central hole is provided in the middle of the top plate, the fixed sleeve is coaxially sleeved outside the cylinder body of the hydraulic cylinder and is coaxially fixed in the central hole, the hydraulic cylinder is vertically arranged and the lower end of the piston rod of the hydraulic cylinder is cooperatively arranged with the top nail, the lower end of the top nail is cooperatively arranged with the middle of the pressing cover, the pressing cover is placed on the upper end face of the inner ring of the bearing to be press-fitted, and a jack corresponding to the pressing cover is provided in the middle of the fixture body.

[0006] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0007] 1. The hydraulic cylinder of the present invention is connected to the fixed sleeve by a thread, which is convenient for replacing the hydraulic cylinder, and then changing the magnitude of the pressure according to requirements, so that production is no longer limited by the length of the shaft body and the magnitude of the pressing force required for the bearing, and it is applicable to the production requirements of shaft bodies with different lengths and different bearing pressing forces.

[0008] 2. The present invention reduces the axial distance of the reverse torque transmission of the torque multiplier through the combined action of a nut locking mechanism, a support block, a rotating inner ring, a fixed outer ring, an insertion rod, and a balance arm, reducing the risk of the shaft body itself bearing the reverse torque.

[0009] 3. The bearing press-fitting mechanism and the nut locking mechanism of the present invention share a jig body, which can reduce the handling of the shaft body between jig bodies and reduce the risk of knocking and bruising of the shaft body. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 is a schematic structural view of the present invention;

[0011] Figure 2 is Figure 1 the top view of

[0012] Figure 3 is Figure 2 the A-A sectional view of

[0013] Figure 4 is a schematic structural view when the nut locking mechanism is installed on the jig body;

[0014] Figure 5 is Figure 4 the top view of

[0015] Figure 6 is Figure 5 the B-B sectional view of DETAILED DESCRIPTION OF THE EMBODIMENTS

[0016] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the scope of protection of the present invention.

[0017] Embodiment 1:

[0018] A rolling bearing press-fitting tooling, including a jig body 1 and a bearing press-fitting mechanism. The bearing press-fitting mechanism includes a support column 2, a hydraulic cylinder 5, a fixed sleeve 6, a top nail 7, a gland 8 and a top plate 11. The jig body 1 is fixed on the assembly station and can ensure that the pressing force transmission path is as short as possible to avoid damaging the shaft body. The upper end of the jig body 1 is threadedly connected to the lower ends of a plurality of uniformly arranged support columns 2 along its circumference. The upper ends of the plurality of support columns 2 are fixedly connected to the top plate 11 through a shoulder nut 3. A central hole is provided in the middle of the top plate 11. The fixed sleeve 6 is coaxially sleeved outside the cylinder body of the hydraulic cylinder 5 through threads, and the fixed sleeve 6 is coaxially fixed in the central hole through a plurality of screws 10. The hydraulic cylinder 5 is vertically arranged and the lower end of the piston rod of the hydraulic cylinder 5 is cooperatively arranged with the top nail 7. The lower end of the top nail 7 is cooperatively arranged with the middle of the gland 8. The gland 8 is placed on the upper end face of the inner ring of the bearing to be press-fitted. A jacking hole corresponding to the gland 8 is provided in the middle of the jig body 1. The jacking hole is used for inserting the shaft body to be press-fitted. The gland 8 is located between the jig body 1 and the top plate 11.

[0019] When using the press-fitting bearing of the present invention, first fix the support column 2 on the fixture body 1 through threads, then place the shaft body into the jacking hole of the fixture body 1, slip the rolling bearing onto the shaft body, then place the gland 8 on the inner ring of the rolling bearing, insert the top nail 7 into the central hole of the gland 8, connect the fixed sleeve 6 and the top plate 11 together with the screw 10, fix the hydraulic cylinder 5 in the fixed sleeve 6 through threads, then fix the assembled top plate 11 on the support column 2, insert the top nail 7 into the end of the piston rod of the hydraulic cylinder 5, and use the manual pressurizing device of the hydraulic cylinder 5 to drive the piston rod of the hydraulic cylinder 5 to continuously extend to press the rolling bearing into the shaft body.

[0020] A plurality of large and small holes 22 are evenly distributed along the circumferential direction of the upper end of the top plate 11. The plurality of large and small holes 22 are arranged in one-to-one correspondence with the plurality of support columns 2. Each of the large and small holes 22 includes a large hole and a small hole that communicate with each other. During use, align the support column 2 with the large hole of the large and small holes 22, and then circumferentially rotate the top plate 11 to make the threaded rod at the top of the support column 2 snap into the small hole of the large and small holes 22, achieving rapid positioning and reducing the time required to tighten the nut after installation.

[0021] The upper end of the top plate 11 is connected with a plurality of evenly distributed lifting rings 4 along its circumferential direction. The lifting rings 4 can be used in cooperation with lifting devices such as forklifts to facilitate the movement of the entire device.

[0022] A handle 9 is provided on the outer side of the gland 8 by welding, which is convenient for moving the gland 8.

[0023] Embodiment 2:

[0024] The difference between this embodiment and Embodiment 1 is:

[0025] The press-fitting tooling further includes a nut locking mechanism, which includes a support block 12, a torque multiplier 13, a wrench socket 14, a rotating inner ring 15, a fixed outer ring 16, an insertion rod 18, and a balance arm 25; a rotating inner ring 15 is correspondingly provided at the upper end of the jacking hole of the fixture body 1, the rotating inner ring 15 is placed at the upper end of the shaft body, a wrench socket 14 is coaxially sleeved outside the rotating inner ring 15, the wrench socket 14 is placed on the end face of the nut to be locked, a torque multiplier 13 is provided at the upper end of the wrench socket 14, and a balance arm 25 is sleeved outside the torque multiplier 13; a plurality of convex teeth 23 are uniformly distributed along the circumferences of the lower end faces of the wrench socket 14 and the rotating inner ring 15 respectively, a fixed outer ring 16 is coaxially sleeved outside the wrench socket 14, and the rotating inner ring 15 is connected to the fixed outer ring 16 through an insertion rod 18. A plurality of through holes 24 are uniformly arranged through the wall thickness directions of the side walls of the fixed outer ring 16 and the rotating inner ring 15. A plurality of notches 26 are provided on the outer wall of the wrench socket 14. The insertion rod 18 passes through the corresponding through holes to connect the fixed outer ring 16 and the rotating inner ring 15, and the insertion rod 18 is arranged in the notches 26. A plurality of positioning holes and a plurality of mounting holes are uniformly distributed along the circumference at the lower end of the fixed outer ring 16. The plurality of positioning holes and the plurality of mounting holes are arranged alternately. The lower end of the fixed outer ring 16 is fixedly connected to the fixture body 1 by means of the positioning holes being clamped into the corresponding cylindrical pins 20 and the mounting holes being screwed with screws. A flat washer 19 is further provided between the screw and the fixture body 1. Two support blocks 12 are provided on the outer side of the fixed outer ring 16, and the two support blocks 12 are cooperatively arranged with the balance arm 25.

[0026] The upper end of each support block 12 is respectively threadedly screwed with a correspondingly horizontally arranged adjusting screw 21, and each adjusting screw 21 is cooperatively arranged with the balance arm 25. The position of the balance arm 25 is finely adjusted through the adjusting screw 21, making the operation more convenient.

[0027] After the bearing is press-fitted, remove the press-fitting mechanism from the fixture body 1, install the fixed outer ring 16 and the support block 12 on the fixture body 1, then place the lock nut on the shaft body, place the rotating inner ring 15 on the end face of the shaft body, and ensure that all the convex teeth 23 of the rotating inner ring 15 are engaged in the groove of the shaft body end face. Insert the insertion rods 18 evenly into the through holes 24 of the fixed outer ring 16 and the rotating inner ring 15. Fit the wrench socket 14 over the outside of the rotating inner ring 15 and place it on the lock nut to be tightened. At the same time, ensure that all the convex teeth 23 of the wrench socket 14 are engaged in the groove of the lock nut. Insert the output shaft of the torque multiplier 13 into the square hole of the wrench socket 14. Lean the balance arm 25 against the support block 12. Restrict the rotation of the housing of the torque multiplier 13 through the combined action of the support block 12 and the balance arm 25 to enable the torque multiplier 13 to work properly. Restrict the rotation of the shaft body through the combined action of the insertion rods 18, the fixed outer ring 16 and the rotating inner ring 15. Finally, apply torque to the torque multiplier 13, and then tighten the lock nut on the shaft body through the wrench socket 14.

[0028] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and the present invention can be implemented in other forms without departing from the spirit or basic characteristics of the present invention. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent conditions of the claims are intended to be included in the present invention. Any reference signs in the claims should not be regarded as limiting the claimed invention.

[0029] In addition, it should be understood that although this specification is described according to embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A rolling bearing press-fitting tooling, characterized in that: It includes a fixture body (1) and a bearing pressing mechanism. The bearing pressing mechanism includes columns (2), a hydraulic cylinder (5), a fixed sleeve (6), a top nail (7), a gland (8), and a top plate (11). The upper end of the fixture body (1) is connected to the lower ends of multiple columns (2). The upper ends of the multiple columns (2) are fixedly connected to the top plate (11) through shoulder nuts (3). A central hole is provided in the middle of the top plate (11). The fixed sleeve (6) is coaxially sleeved outside the cylinder body of the hydraulic cylinder (5) and is coaxially fixed in the central hole. The hydraulic cylinder (5) is vertically arranged, and the lower end of the piston rod of the hydraulic cylinder (5) is cooperatively arranged with the top nail (7). The lower end of the top nail (7) is cooperatively arranged with the middle part of the gland (8). The gland (8) is placed on the upper end face of the inner ring of the bearing to be pressed. A jack corresponding to the gland (8) is provided in the middle of the fixture body (1). The pressing tooling further includes a nut locking mechanism. The nut locking mechanism includes a support block (12), a torque multiplier (13), a wrench socket (14), a rotating inner ring (15), a fixed outer ring (16), an insertion rod (18), and a balance arm (25). A rotating inner ring (15) is correspondingly provided at the upper end of the jack of the fixture body (1). A wrench socket (14) is coaxially sleeved outside the rotating inner ring (15). A torque multiplier (13) is provided at the upper end of the wrench socket (14). A balance arm (25) is sleeved outside the torque multiplier (13). Multiple convex teeth (23) are provided on the lower end faces of both the wrench socket (14) and the rotating inner ring (15). A fixed outer ring (16) is coaxially sleeved outside the wrench socket (14), and the rotating inner ring (15) is connected to the fixed outer ring (16) through the insertion rod (18). The lower end of the fixed outer ring (16) is fixedly connected to the fixture body (1). Two support blocks (12) are provided on the outside of the fixed outer ring (16), and the two support blocks (12) are cooperatively arranged with the balance arm (25).

2. The pressing tooling for a rolling bearing according to claim 1, wherein: Multiple large and small holes (22) are provided at the upper end of the top plate (11). The multiple large and small holes (22) are correspondingly arranged with the multiple columns (2) one by one. Each of the large and small holes (22) includes a large hole and a small hole that are communicated with each other.

3. A rolling bearing press-fitting tooling according to claim 1 or 2, characterized in that: The upper end of the top plate (11) is connected to multiple lifting rings (4).

4. A rolling bearing press-fitting tooling according to claim 1 or 2, characterized in that: A handle (9) is provided on the outside of the gland (8).

5. The pressing tooling for a rolling bearing according to claim 4, wherein: The upper end of each support block (12) is respectively threadedly screwed with a corresponding horizontally arranged adjusting screw (21). Each adjusting screw (21) is cooperatively arranged with the balance arm (25).

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