Bending bearing assembly welding clamp

Abstract

The utility model discloses a bending bearing assembly welding fixture, which relates to the technical field of welding fixtures and comprises a welding fixture body and a connecting rod pushing block, a bearing limiting groove is arranged on one side of the welding fixture body, and a rack limiting groove is arranged on one side of the bearing limiting groove on the welding fixture body. A connecting rod auxiliary groove, a bearing limiting groove and a rack limiting groove are formed in the welding clamp and located on the other side of the bearing limiting groove, and the forming position of the connecting rod auxiliary groove corresponds to the connecting position of each part on the bending bearing assembly; a pushing block mounting groove is further formed in the welding clamp, a connecting rod pushing block is arranged in the pushing block mounting groove, the axial width of the connecting rod pushing block is smaller than that of the pushing block mounting groove, a pushing spring is arranged between the connecting rod pushing block and the welding clamp body, and the connecting rod pushing block is used for pushing and fixing the bent bearing assembly under the action of the pushing spring. The laser welding device has the effects of realizing laser welding assembly of the bearing, the rack and the connecting rod and ensuring the welding quality and the finished product quality.

Description

Technical Field

[0001] The utility model relates to the technical field of welding fixtures, and more specifically, to a welding fixture for a bending bearing assembly. Background Art

[0002] The bending bearing assembly is one of the core components of medical devices, such as Figure 1 As shown in FIG. 1 , the assembly is composed of three parts: a bearing 100, a gear bar 200, and a connecting rod 300. In the unwelded state, the bearing 100, the gear bar 200, and the connecting rod 300 are as shown in FIG. Figure 1 The figure shows the separated independent components; in the welding state, one end of the gear bar 200 passes through the bearing 100 from one end of the bearing 100 and is welded on the bearing 100, and one end of the connecting rod 300 is embedded in the bearing 100 from the other end of the bearing 100 and is also welded on the bearing 100. The state of the bending bearing assembly formed by welding is as shown in FIG. Figure 2 shown.

[0003] Currently, there is no suitable welding fixture for welding the three parts in the bending bearing assembly. Utility Model Content

[0004] In view of this problem in practical application, the utility model aims to provide a welding fixture for a bending bearing assembly, and the specific scheme is as follows:

[0005] A bending bearing assembly welding fixture, comprising a welding fixture body and a connecting rod pushing block, wherein a bearing limiting groove is provided on one side of the welding fixture body, a rack limiting groove is provided on the welding fixture body on one side of the bearing limiting groove, and a connecting rod auxiliary groove is provided on the welding fixture on the other side of the bearing limiting groove, wherein the positions of the bearing limiting groove, the rack limiting groove and the connecting rod auxiliary groove correspond to the connection positions of the parts on the bending bearing assembly;

[0006] The welding fixture is also provided with a pushing block installation groove, in which the connecting rod pushing block is arranged. The axial width of the connecting rod pushing block is smaller than the axial width of the pushing block installation groove. A pushing spring is arranged between the connecting rod pushing block and the welding fixture body. The connecting rod pushing block is used to push and fix the bending bearing assembly under the action of the pushing spring.

[0007] Furthermore, it also includes a welding fixture base, the surface of the welding fixture base has an inclined surface, and the welding fixture body is placed on the inclined surface so that the welding fixture body is arranged at an angle.

[0008] Furthermore, a blocking seat is provided in front of the inclined surface, and the blocking seat is used to limit the movement of the welding fixture body.

[0009] Furthermore, the angle of the inclined surface is not greater than 90°.

[0010] Furthermore, there are two pushing block installation grooves, each of which is provided with a connecting rod pushing block, and one of the pushing block installation grooves is communicated with the connecting rod auxiliary groove.

[0011] Furthermore, a spring installation groove is provided on one side of the connecting rod pushing block, one end of the pushing spring is located in the spring installation groove, and the other end extends out of the spring installation groove and abuts against the welding fixture body.

[0012] Furthermore, the pushing spring is arranged along the axial direction of the welding fixture body.

[0013] Furthermore, the rack limiting groove and the connecting rod auxiliary groove are both arranged along the axial direction of the welding fixture body, and the two are on the same axis.

[0014] Furthermore, the cross-section of the rack limiting groove near the end of the welding fixture body is triangular.

[0015] Furthermore, the cross section of the rack limiting groove at one end close to the bearing limiting groove is rectangular.

[0016] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0017] The present application provides a fixture for a bending bearing assembly, which can realize the laser welding assembly of the bearing, rack, and connecting rod, ensure the stability during the welding process, and guarantee the welding quality and the quality of the finished product. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the structure of the various parts of the bending and rotating bearing assembly before welding in the utility model;

[0019] Figure 2 This is a schematic diagram of the structure of the bending and rotating bearing assembly after welding in the utility model;

[0020] Figure 3 It is a structural schematic diagram of the welding fixture body in the utility model;

[0021] Figure 4 It is a three-dimensional schematic diagram of the bending bearing assembly of the utility model being placed on the welding fixture body;

[0022] Figure 5 It is a top view of the bending bearing assembly of the utility model placed on the welding fixture body;

[0023] Figure 6 For this utility model Figure 5 Partial cross-sectional view at AA in the middle;

[0024] Figure 7 This is a schematic diagram of the state of welding points ①②③ of the utility model;

[0025] Figure 8 It is a schematic diagram of the state of the utility model when welding welding point ④.

[0026] Reference numerals: 1, welding fixture body; 2, connecting rod pushing block; 3, bearing limiting groove; 4, rack limiting groove; 5, connecting rod auxiliary groove; 6, pushing block mounting groove; 7, pushing spring; 8, welding fixture base; 9, inclined surface; 10, blocking seat;

[0027] 100, bearing; 200, gear bar; 201, groove; 300, connecting rod; 301, notch. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0029] like Figure 1-2 As shown in the figure, the bending bearing assembly is composed of three parts: bearing 100, gear bar 200 and connecting rod 300. Among them, one end of the connecting rod 300 has two forks, and each fork has a notch 301 at the outer corner. When connected, the forked end of the connecting rod 300 passes through the inner ring of the bearing 100, and the side of the inner ring of the bearing 100 is just embedded in the two notches 301. At this time, the connecting rod 300 and the bearing 100 need to be welded at the joint. Figure 2 , the welding points are welding points ① and ② respectively; one end of the gear bar 200 is provided with teeth along its length direction, and the other end is provided with a groove 201 on the side wall near the end face. When connecting, the end with the groove 201 passes through the outer ring of the bearing 100 so that the inner side of the outer ring of the bearing 100 is just embedded in the groove 201. At this time, the gear bar 200 and the bearing 100 need to be welded at the joint, see Figure 2 And refer to Figure 8 The welding points are welding points ③ and ④ respectively.

[0030] like Figure 3-4 As shown, a bending bearing assembly welding fixture includes a welding fixture body 1 and a connecting rod pushing block 2.

[0031] The welding fixture body 1 is preferably a rectangular block structure.

[0032] A bearing limiting groove 3 is provided on the top surface of the welding fixture body 1, the depth of the bearing limiting groove 3 is not greater than the diameter of the bearing 100, and when the bearing 100 is placed in the bearing limiting groove 3, the highest point of the inner side wall of the inner ring of the bearing 100 just protrudes from the top surface of the welding fixture body 1, and the protruding space is sufficient for the gear bar 200 to pass through the inner ring.

[0033] A rack limiting groove 4 is provided on the welding fixture body 1 on one side of the bearing limiting groove 3, and the gear bar 200 is placed in the rack limiting groove 4. A connecting rod auxiliary groove 5 is provided on the welding fixture on the other side of the bearing limiting groove 3, and the connecting rod auxiliary groove 5 is used to assist in the installation of the connecting rod 300. The positions of the bearing limiting groove 3, the rack limiting groove 4, and the connecting rod auxiliary groove 5 correspond to the connection positions of the various parts on the bending bearing 100 assembly. Specifically, the rack limiting groove 4 and the connecting rod auxiliary groove 5 are both arranged along the axial direction of the welding fixture body 1, and the two are on the same axis.

[0034] Combination Figure 5-6 A pushing block mounting groove 6 is also provided on the welding fixture body 1, and a connecting rod pushing block 2 is provided in the pushing block mounting groove 6. The connecting rod pushing block 2 protrudes from the top surface of the welding fixture body 1, and the axial width of the connecting rod pushing block 2 is smaller than the axial width of the pushing block mounting groove 6. A pushing spring 7 is provided between the connecting rod pushing block 2 and the welding fixture body 1, and the pushing spring 7 is arranged axially along the welding fixture body 1. Under the action of the pushing spring 7, the connecting rod pushing block 2 pushes and fixes the bending bearing 100 assembly.

[0035] During welding, the gear bar 200 penetrates the bearing 100 to connect the two, the bearing 100 is located in the bearing limiting groove 3, the gear bar 200 is limited in the rack limiting groove 4, the connecting rod 300 penetrates the bearing 100 to connect the two, and under the action of the tightening spring 7, the connecting rod tightening block 2 pushes the connecting rod 300 to fix it, at this time four welding points ①②③④ are formed, and the welding of the four welding points can be completed using welding equipment.

[0036] It should be noted that the welding equipment may be a laser welding machine. Laser welding is a prior art and this application does not involve any improvement thereto, so it will not be described in detail here.

[0037] The welding fixture of the bending bearing 100 assembly also includes a welding fixture base 8, such as Figure 7-8 As shown, the surface of the welding fixture base 8 has an inclined surface 9, the angle of the inclined surface 9 is not greater than 90°, preferably, the angle of the inclined surface 9 is 45°; the welding fixture body 1 is freely placed on the inclined surface 9, so that the welding fixture body 1 is arranged tilted, which is conducive to welding by the welding equipment. According to the change of the welding point, the direction of the welding fixture body 1 can be adjusted so that the point to be welded faces the welding end of the laser welding equipment.

[0038] There is a blocking seat 10 in front of the inclined surface 9, and the blocking seat 10 is used to limit the movement of the welding fixture body 1. The blocking seat 10 is integrated with the welding fixture base 8, and the welding fixture body 1 is placed behind the inclined surface 9, and its front side abuts against the side of the blocking seat 10.

[0039] Furthermore, the vertical height of the welding fixture body 1 relative to the inclined surface 9 is greater than the vertical height of the blocking seat 10 relative to the inclined surface 9. Thus, when the welding fixture body 1 is placed on the inclined surface 9, the top surface of the welding fixture body 1 is higher than the top surface of the blocking seat 10, and the gear bar 200 or the connecting rod 300 extending from the welding fixture body 1 will not be blocked.

[0040] In addition, there are two tightening block installation grooves 6, each of which is provided with a connecting rod tightening block 2, and the two connecting rod tightening blocks 2 correspond to the two forks on the connecting rod 300, so that each connecting rod tightening block 2 presses against one fork. Moreover, one of the tightening block installation grooves 6 is connected to the connecting rod auxiliary groove 5.

[0041] A spring mounting groove (not shown in the figure) is opened on one side of the connecting rod pushing block 2, one end of the pushing spring 7 is located in the spring mounting groove, and the other end extends out of the spring mounting groove and abuts against the welding fixture body 1, wherein the spring mounting groove is opened along the axial direction of the welding fixture body 1 so that the pushing spring 7 is arranged along the axial direction of the welding fixture body 1.

[0042] When the connecting rod 300 is placed on the welding fixture body 1, the connecting rod 300 uses the edge line of the connecting rod auxiliary groove 5 as an auxiliary line, and one side of the connecting rod 300 is attached to the auxiliary line and passes through the middle of the two connecting rod pushing blocks 2. Under the action of the pushing spring 7, the two connecting rod pushing blocks 2 are pressed against the two forks of the connecting rod 300 until the connecting rod 300 and the bearing 100 are pressed and fixed.

[0043] Furthermore, the cross section of the rack limiting groove 4 near the end of the welding fixture body 1 is triangular. The groove with a triangular cross section can make the gear bar 200 tilted in the groove to meet the installation requirements of the bending bearing 100 assembly.

[0044] The cross section of the rack limiting groove 4 at one end close to the bearing limiting groove 3 is rectangular. The groove with a rectangular cross section can adapt to the shape of one end of the gear bar 200 having the groove 201 to maintain the stability of the gear bar 200 on the fixture.

[0045] The specific use process of the utility model is:

[0046] First, the bearing 100 and the gear bar 200 are assembled to form a preliminary assembly;

[0047] Next, the preliminary assembly is placed on the welding fixture body 1, the bearing 100 is placed in the bearing limiting groove 3, and the gear bar 200 is located on the rack limiting groove 4;

[0048] Next, put the connecting rod 300 in, and make sure that the connecting rod 300 is tightened by the connecting rod tightening block 2;

[0049] After that, adjust the welding parameters of the laser welding equipment and weld the welding points ①, ②, and ③. Figure 7 As shown;

[0050] Finally, turn the welding fixture body 1 and the bending bearing 100 assembly 180° to the welding position ④, as shown in FIG. Figure 8 As shown, welding is completed.

[0051] The above is only a preferred embodiment of the present invention. The protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. A welding fixture for a bending bearing assembly, characterized in that: It includes a welding fixture body and a connecting rod pushing block, wherein a bearing limiting groove is provided on one side of the welding fixture body, a rack limiting groove is provided on the welding fixture body on one side of the bearing limiting groove, and a connecting rod auxiliary groove is provided on the welding fixture on the other side of the bearing limiting groove, and the positions of the bearing limiting groove, the rack limiting groove and the connecting rod auxiliary groove correspond to the connection positions of the parts on the bending bearing assembly; The welding fixture is also provided with a pushing block installation groove, in which the connecting rod pushing block is arranged. The axial width of the connecting rod pushing block is smaller than the axial width of the pushing block installation groove. A pushing spring is arranged between the connecting rod pushing block and the welding fixture body. The connecting rod pushing block is used to push and fix the bending bearing assembly under the action of the pushing spring.

2. The bending bearing assembly welding fixture according to claim 1 is characterized in that: It also includes a welding fixture base, the surface of which has an inclined surface, and the welding fixture body is placed on the inclined surface so that the welding fixture body is arranged inclinedly.

3. The bending bearing assembly welding fixture according to claim 2, characterized in that: A blocking seat is provided in front of the inclined surface, and the blocking seat is used for limiting the movement of the welding fixture body.

4. The bending bearing assembly welding fixture according to claim 2, characterized in that: The angle of the inclined surface is not greater than 90°.

5. The bending bearing assembly welding fixture according to claim 1, characterized in that: There are two pushing block installation grooves, each of which is provided with a connecting rod pushing block, and one of the pushing block installation grooves is communicated with the connecting rod auxiliary groove.

6. The bending bearing assembly welding fixture according to claim 1, characterized in that: A spring installation groove is provided on one side of the connecting rod pushing block, one end of the pushing spring is located in the spring installation groove, and the other end extends out of the spring installation groove and abuts against the welding fixture body.

7. The bending bearing assembly welding fixture according to claim 1, characterized in that: The rack limiting groove and the connecting rod auxiliary groove are both arranged along the axial direction of the welding fixture body, and the two are on the same axis.

8. The bending bearing assembly welding fixture according to claim 1, characterized in that: The cross section of the rack limiting groove near the end of the welding fixture body is triangular.

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