Shaft rod assembly welding clamp

Abstract

The utility model discloses a shaft lever assembly welding fixture, which relates to the technical field of welding fixtures and comprises a welding fixture body, a fixing piece limiting groove is arranged on the end face of one end of the welding fixture body, a shaft lever mounting hole is arranged inside the welding fixture body along the axial direction of the welding fixture body, and the shaft lever mounting hole is positioned in the center of the fixing piece limiting groove. At least one pressing block is arranged at the end, close to the fixing piece limiting groove, of the welding clamp body, one end of the pressing block is movably connected to the welding clamp body, and the pressing block can swing along the center of a movable connecting point to press or loosen a fixing piece on the shaft rod assembly. The welding clamp body is further provided with a shaft rod fixing piece and a shaft rod positioning block, the shaft rod fixing piece is used for fixing an upper shaft rod of the shaft rod assembly, and the shaft rod positioning block is used for positioning the upper shaft rod of the shaft rod assembly. The shaft rod assembly welding fixture can clamp and fix a shaft rod assembly needing to be welded for welding, solves the problem of insufficient accuracy in the existing welding process, and has the effect of being beneficial to improving the quality of a finished product of the shaft rod assembly.

Description

Technical Field

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

[0002] The shaft assembly is one of the important accessories of medical surgical instruments. Figure 1-2 As shown, the shaft assembly includes a shaft 100 and a fixing plate 200. The shaft assembly requires the shaft 100 and the fixing plate 200 to be welded to form a finished product. Figure 1 The diagram shows the state of the shaft assembly before welding. At this time, the shaft 100 and the fixing plate 200 are two independent parts. Figure 2 Shown is a schematic diagram of the shaft assembly after welding.

[0003] During the production and processing of the shaft assembly, various factors may cause the push rod assembly welding position deviation and other problems. The position deviation of the shaft assembly will further affect the assembly and use function of the whole machine. Therefore, how to ensure the accuracy of the welding between the shaft and the fixing plate is a problem that needs to be solved at present. Utility Model Content

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

[0005] A shaft assembly welding fixture comprises a welding fixture body, wherein a fixing plate limiting groove is provided on one end surface of the welding fixture body, a shaft mounting hole is provided inside the welding fixture body along its axial direction, and the shaft mounting hole is located at the center of the fixing plate limiting groove;

[0006] At least one pressing block is provided at one end of the welding fixture body close to the fixing plate limiting groove, one end of the pressing block is movably connected to the welding fixture body, and the pressing block can swing along the center of the movable connection point to press or release the fixing plate on the shaft assembly;

[0007] The welding fixture body is also provided with a shaft fixing piece and a shaft positioning block, wherein the shaft fixing piece is used to fix the shaft on the shaft assembly, and the shaft positioning block is used to position the shaft on the shaft assembly.

[0008] Furthermore, a connecting groove with a semicircular cross-section is opened on the side wall of one end of the welding fixture body close to the limiting groove of the fixing plate, and the pressing block is provided with a spherical head adapted to the semicircular connecting groove. The spherical head is installed in the connecting groove and can rotate around its center in the connecting groove.

[0009] Furthermore, the pressing block is bent from the spherical head toward the center of the welding fixture body to form a pressing portion, and the pressing portion is used to press the fixing plate on the shaft assembly.

[0010] Furthermore, a ball plunger is provided on the clamping portion, and a working end of the ball plunger faces the welding fixture body.

[0011] Furthermore, positioning pins are provided on both upper and lower end surfaces of the pressing block, and the positioning pins penetrate through the welding fixture body and abut against the pressing block.

[0012] Furthermore, the shaft fixing piece is a fixing screw, and a screw hole is opened on the welding fixture body in a direction perpendicular to its axial direction. The screw hole is connected to the shaft mounting hole. The fixing screw is spirally connected to the welding fixture body through the screw hole and one end of the fixing screw extends to the shaft mounting hole.

[0013] Furthermore, the shaft rod positioning block penetrates the welding fixture body in a direction perpendicular to the axial direction of the welding fixture body, and the shaft rod positioning block passes through the shaft rod mounting hole so as to position the shaft rod when the shaft rod passes through the shaft rod mounting hole.

[0014] Furthermore, the fixing plate limiting groove is configured as a waist-shaped groove structure, and the width of the waist-shaped groove is adapted to the diameter of the fixing plate on the shaft assembly.

[0015] Furthermore, the shaft rod mounting hole is configured as a circular hole structure, and the inner diameter of the circular hole structure is adapted to the outer diameter of the shaft rod on the shaft rod assembly.

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

[0017] In the utility model, a shaft rod assembly welding fixture is provided, which can clamp and fix the shaft rod assembly to be welded for welding, thereby solving the problem of insufficient accuracy in existing welding, helping to improve welding quality, and thus improving the quality of finished products. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the structure of the central axis rod assembly of the utility model before welding;

[0019] Figure 2 This is a schematic diagram of the structure of the central axis rod assembly after welding of the utility model;

[0020] Figure 3 It is an explosion diagram of the utility model;

[0021] Figure 4 It is an overall schematic diagram of the utility model;

[0022] Figure 5 It is a schematic diagram of the working state of the utility model.

[0023] Reference numerals: 1, welding fixture body; 2, fixing plate limiting groove; 3, shaft rod mounting hole; 4, pressing block; 41, spherical head; 42, pressing portion; 5, shaft rod fixing piece; 6, shaft rod positioning block; 7, connecting groove; 8, ball head plunger; 9, positioning pin; 10, screw hole;

[0024] 100, shaft rod; 200, fixing plate. DETAILED DESCRIPTION

[0025] 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.

[0026] like Figure 1-2 As shown, the shaft assembly includes a shaft 100 and a fixing plate 200. The shaft 100 is a cylindrical rod-shaped structure, and the fixing plate 200 is a circular sheet-shaped structure, and a small hole is opened in the center of the circular sheet-shaped structure, and the inner diameter of the small hole is consistent with the outer diameter of the shaft 100. The finished shaft assembly is that the shaft 100 passes through the small hole on the fixing plate 200 until the fixing plate 200 reaches a preset position on the shaft 100, and the fixing plate 200 is welded to the shaft 100, so that the finished shaft assembly can be obtained.

[0027] like Figure 3-5 As shown, a shaft assembly welding fixture includes a welding fixture body 1. In this embodiment, the welding fixture body 1 is a cylindrical body with a circular cross section. In order to improve the placement stability, a horizontal placement surface (not shown in the figure) can also be formed by cutting at the bottom end of the cylindrical body. In addition, the welding fixture body 1 of the present application can also adopt a cylindrical body with a rectangular cross section.

[0028] A fixing plate limiting groove 2 is provided on one end surface of the welding fixture body 1. The fixing plate limiting groove 2 is set as a waist-shaped groove structure, and the width of the waist-shaped groove is adapted to the diameter of the fixing plate 200 on the shaft assembly.

[0029] A shaft mounting hole 3 is provided inside the welding fixture body 1 along its axial direction. The shaft mounting hole 3 is set as a circular hole structure, and the inner diameter of the circular hole structure is adapted to the outer diameter of the shaft 100 on the shaft assembly. Preferably, the shaft mounting hole 3 is located at the center of the cross section of the welding fixture body 1. At the same time, the relative positions of the shaft mounting hole 3 and the fixing plate limiting groove 2 are adapted to the relative positions of the shaft 100 and the fixing plate 200, that is, the shaft mounting hole 3 is located at the center of the fixing plate limiting groove 2.

[0030] At least one pressing block 4 is provided at one end of the welding fixture body 1 close to the fixed plate limiting groove 2. In this embodiment, preferably, two pressing blocks 4 are provided, one end of each of the two pressing blocks 4 is movably connected to the welding fixture body 1, and the pressing block 4 can swing along the center of the movable connection point so that the other end thereof swings to the fixed plate limiting groove 2 to press or release the fixed plate 200 located in the groove.

[0031] The welding fixture body 1 is also provided with a shaft fixing member 5 and a shaft positioning block 6, which are both arranged in a direction perpendicular to the axial direction of the welding fixture body 1. The shaft fixing member 5 is used to fix the shaft 100 on the shaft assembly, and the shaft positioning block 6 is used to position the shaft 100 on the shaft assembly. The position of the shaft positioning block 6 is located at a preset size, so that when the shaft 100 passes through the shaft mounting hole 3 and abuts against the shaft positioning block 6, the relative position of the fixing sheet 200 and the shaft 100 is the preset position of the two in the finished shaft assembly.

[0032] In addition, in order to realize the swing of the pressing block 4, the connection between the pressing block 4 and the welding fixture body 1 is as follows: the two side walls of the welding fixture body 1 at one end close to the fixing plate limiting groove 2 are respectively provided with a connecting groove 7 with a semicircular cross section, and the pressing block 4 is provided with a spherical head 41 adapted to the semicircular connecting groove, and the spherical head 41 is installed in the connecting groove 7 and can rotate around its center in the connecting groove 7. The swing of the pressing block 4 is realized by the spherical head 41 rotating in the connecting groove 7 with a semicircular cross section.

[0033] In another possible embodiment, the head of the pressing block 4 may be connected to the welding fixture body 1 (not shown in the figure) through a hinge to achieve the swing of the pressing block 4.

[0034] It should be noted that the connection method between the pressure block 4 and the welding fixture body 1 in the present application is not limited to the above two methods. Any connection method in the prior art that can realize the pressure block 4 swinging to its other end and pressing the fixing plate 200 can be regarded as within the protection scope of the present application.

[0035] The pressing block 4 extends from its head toward the center of the welding fixture body 1 and bends to form a pressing portion 42, which is used to press the fixing plate 200 on the shaft assembly. Preferably, when the pressing block 4 swings to the pressing portion 42 to press the fixing plate 200, the pressing end surface of the pressing portion 42 is parallel to the end surface of the welding fixture body 1 to ensure that the fixing plate 200 is pressed over a maximum area.

[0036] Furthermore, a ball plunger 8 is provided on the pressing portion 42, and the working end of the ball plunger 8 faces the welding fixture body 1. Preferably, the ball plunger 8 is an M3 ball plunger. When the two side pressing blocks 4 are closed, the ball head on the ball plunger 8 will pop out and press the fixing plate 200, thereby improving the pressing stability.

[0037] The upper and lower end surfaces of the pressing block 4 are also provided with positioning pins 9, and both positioning pins 9 penetrate the welding fixture body 1 and abut against the pressing block 4. The setting of the positioning pins 9 can prevent the pressing block 4 from shaking along its upper and lower end surfaces during the swinging process, thereby improving the stability of the pressing block 4 during the swinging process.

[0038] In addition, the shaft fixing member 5 is a fixing screw. A screw hole 10 is provided on the welding fixture body 1 in a direction perpendicular to the axial direction thereof. The screw hole 10 is connected to the shaft mounting hole 3. The fixing screw is screwed to the welding fixture body 1 through the screw hole 10 and one end of the fixing screw extends to the shaft mounting hole 3. Preferably, the fixing screw is an M3 fixing screw. When fixing, the fixing screw is screwed into the welding fixture body 1 through the screw hole 10 until the fixing screw is pressed against the shaft 100 to fix the shaft 100.

[0039] The shaft positioning block 6 penetrates the welding fixture body 1 in a direction perpendicular to the axial direction of the welding fixture body 1, and the shaft positioning block 6 passes through the shaft mounting hole 3 so as to position the shaft 100 when the shaft 100 passes through the shaft mounting hole 3. Preferably, the shaft positioning block 6 is set at a position where the distance between the shaft positioning block 6 and the fixing plate limiting groove 2 is equal to the distance between the fixing plate 200 on the finished shaft assembly and one end of the shaft 100.

[0040] The specific implementation principle of the utility model is: when welding the shaft assembly, first put the fixing plate 200 into the fixing plate limiting groove 2, then pass the shaft 100 through the small hole of the fixing plate 200, and pass it into the shaft mounting hole 3 until it reaches the shaft positioning block 6, and then install the shaft fixing part 5 to fix the shaft 100, and then swing the pressure block 4 to close the pressure blocks 4 on both sides. At this time, the ball head of the ball head plunger 8 on the pressure block 4 will pop out and press the fixing plate 200. Finally, the connection between the fixing plate 200 and the shaft 100 is welded by a laser welding machine to complete the welding.

[0041] 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 shaft assembly welding fixture, characterized in that: It comprises a welding fixture body, wherein a fixing plate limiting groove is provided on one end surface of the welding fixture body, and a shaft rod mounting hole is provided inside the welding fixture body along its axial direction, and the shaft rod mounting hole is located at the center of the fixing plate limiting groove; At least one pressing block is provided at one end of the welding fixture body close to the fixing plate limiting groove, one end of the pressing block is movably connected to the welding fixture body, and the pressing block can swing along the center of the movable connection point to press or release the fixing plate on the shaft assembly; The welding fixture body is also provided with a shaft fixing piece and a shaft positioning block, wherein the shaft fixing piece is used to fix the shaft on the shaft assembly, and the shaft positioning block is used to position the shaft on the shaft assembly.

2. The shaft assembly welding fixture according to claim 1, characterized in that: A connecting groove with a semicircular cross section is provided on the side wall of one end of the welding fixture body close to the fixing plate limiting groove. The pressing block is provided with a spherical head adapted to the semicircular connecting groove. The spherical head is installed in the connecting groove and can rotate around its center in the connecting groove.

3. The shaft assembly welding fixture according to claim 2, characterized in that: The pressing block is bent from the spherical head toward the center of the welding fixture body to form a pressing portion, and the pressing portion is used to press the fixing plate on the shaft assembly.

4. The shaft assembly welding fixture according to claim 3, characterized in that: The pressing part is provided with a ball plunger, and the working end of the ball plunger faces the welding fixture body.

5. The shaft assembly welding fixture according to claim 1, characterized in that: The upper and lower end surfaces of the pressing block are also provided with positioning pins, and the positioning pins penetrate the welding fixture body and abut against the pressing block.

6. The shaft assembly welding fixture according to claim 1, characterized in that: The shaft fixing piece is a fixing screw. A screw hole is opened on the welding fixture body in a direction perpendicular to its axial direction. The screw hole is connected to the shaft mounting hole. The fixing screw is spirally connected to the welding fixture body through the screw hole and one end of the fixing screw extends to the shaft mounting hole.

7. The shaft assembly welding fixture according to claim 1, characterized in that: The shaft rod positioning block penetrates the welding fixture body in a direction perpendicular to the axial direction of the welding fixture body, and the shaft rod positioning block passes through the shaft rod mounting hole so as to position the shaft rod when the shaft rod passes through the shaft rod mounting hole.

8. The shaft assembly welding fixture according to claim 1, characterized in that: The fixing plate limiting groove is configured as a waist-shaped groove structure, and the width of the waist-shaped groove is adapted to the diameter of the fixing plate on the shaft assembly.

9. The shaft assembly welding fixture according to claim 1, characterized in that: The shaft rod mounting hole is configured as a circular hole structure, and the inner diameter of the circular hole structure is adapted to the outer diameter of the shaft rod on the shaft rod assembly.

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