阅读说明：本技术 用于起重机栏杆的焊接夹具 (Welding fixture for crane railing ) 是由 彭磊 谭彪 刘辉 明良政 王俊杰 于 2021-07-30 设计创作，主要内容包括：本发明提供一种用于起重机栏杆的焊接夹具,用于起重机栏杆的焊接夹具包括基座和装夹组件,基座上形成有安装面,装夹组件设置在安装面上并包括沿安装面的第一方向间隔布置的第一装夹组、第二装夹组和第三装夹组,第一装夹组和第二装夹组均包括沿安装面的第二方向依次间隔布置的多个横杆装夹单元,第三装夹组包括沿第二方向依次间隔布置的多个竖杆装夹单元,第一方向垂直于第二方向。通过本发明的技术方案,可以实现不同尺寸规格的起重机栏杆的焊接组装,达到提高通用性的目的。(The invention provides a welding fixture for a crane railing, which comprises a base and a clamping assembly, wherein an installation surface is formed on the base, the clamping assembly is arranged on the installation surface and comprises a first clamping group, a second clamping group and a third clamping group which are arranged at intervals along a first direction of the installation surface, the first clamping group and the second clamping group respectively comprise a plurality of cross rod clamping units which are sequentially arranged at intervals along a second direction of the installation surface, the third clamping group comprises a plurality of vertical rod clamping units which are sequentially arranged at intervals along the second direction, and the first direction is perpendicular to the second direction. By the technical scheme, welding and assembling of the crane railings with different sizes and specifications can be realized, and the purpose of improving universality is achieved.)

1. A welding fixture for crane railings, characterized in that the welding fixture comprises:

the device comprises a base (1), wherein a mounting surface is formed on the base (1); and

the clamping assembly is arranged on the mounting surface and comprises a first clamping group (5), a second clamping group (6) and a third clamping group (7) which are arranged at intervals in the first direction of the mounting surface, the first clamping group (5) and the second clamping group (6) comprise edges, a plurality of transverse rod clamping units (2) are arranged at intervals in sequence in the second direction of the mounting surface, the third clamping group (7) comprises edges, a plurality of vertical rod clamping units (9) are arranged at intervals in sequence in the second direction, and the first direction is perpendicular to the second direction.

2. The welding fixture for crane railings according to claim 1, characterized in that the cross bar clamping unit (2) comprises a first positioning column (21) arranged on the base (1) in a liftable manner and a pressing plate (22) arranged on the first positioning column (21), and a clamping opening (23) for accommodating a rod of the crane railing (4) is formed between the pressing plate (22) and the base (1).

3. The welding fixture for crane rails as claimed in claim 2, wherein the base (1) is formed with a connecting hole having an internal thread, and the lower end of the first positioning post (21) is formed with an external thread matching the internal thread.

4. The welding fixture for the crane handrail as claimed in claim 3, wherein the base (1) comprises a base body (11) provided with a first mounting hole and a threaded shaft sleeve (12) embedded in the first mounting hole, and the threaded shaft sleeve (12) is provided with the connecting hole.

5. The welding fixture for the crane handrail as claimed in claim 2, wherein the pressing plate (22) is provided with a first engaging hole for the first positioning post (21) to pass through, and the cross bar clamping unit (2) further comprises a positioning sleeve (24) which is engaged with the first positioning post (21) and is located between the base (1) and the pressing plate (22).

6. The welding fixture for the crane balustrade according to claim 5, wherein the cross bar clamping unit (2) further comprises a rotating handle (25) located on one side of the pressure plate (22) departing from the positioning shaft sleeve (24), the rotating handle (25) comprises a mounting portion (251) formed with a second sleeving hole and a handheld portion (252) connected with the mounting portion (251), and the mounting portion (251) is sleeved on the first positioning column (21) through the second sleeving hole.

7. The welding fixture for crane railings according to any one of claims 2 to 6, characterized in that the crossbar clamping unit (2) further comprises a second positioning post (26) arranged on the base (1), and the second positioning post (26) is located at one end of the pressure plate (22) away from the first positioning post (21).

8. The welding fixture for the crane handrail as claimed in claim 7, wherein the base (1) comprises a base body (11) with a second mounting hole and a first mounting sleeve (13) embedded in the second mounting hole, and the second positioning column (26) is inserted into the first mounting sleeve (13).

9. The welding fixture for the crane handrail as claimed in any one of claims 2 to 6, wherein the clamping assembly further comprises a fourth clamping group (8), the first clamping group (5), the third clamping group (7), the second clamping group (6) and the fourth clamping group (8) are sequentially arranged in four rows at intervals along the first direction of the mounting surface, and the fourth clamping group (8) comprises a plurality of vertical rod clamping units (9) which are sequentially arranged at intervals along the second direction of the mounting surface.

10. The welding fixture for crane rails as claimed in any one of claims 2 to 6, wherein the clamping assembly further comprises a third positioning column (3) detachably disposed on the base (1), and the third positioning column (3) is used for supporting a positioning block (44) of a crane rail (4).

Technical Field

The invention belongs to the technical field of engineering machinery, and particularly relates to a welding clamp for a crane railing.

Background

The crane railing is an indispensable safety protection component of the crane, and the crane railing is generally formed by welding and assembling section steel or pipe materials. The traditional welding assembly mode is as follows: put into all member bars of railing and carry out whole pendulum welding in the draw-in groove to the frock base, because the size of draw-in groove is fixed, therefore can only make the hoist railing of a specification, the commonality is lower.

Disclosure of Invention

Aiming at the defects or shortcomings in the prior art, the invention provides a welding clamp for a crane railing, which can realize the welding and assembly of crane railings with different dimensions so as to achieve the purpose of improving the universality.

In order to achieve the above object, the present invention provides a welding jig for a crane rail, wherein the welding jig for a crane rail comprises: a base and a clamping assembly; a mounting surface is formed on the base; the clamping assembly is arranged on the mounting surface and comprises a first clamping group, a second clamping group and a third clamping group which are arranged at intervals along the first direction of the mounting surface, the first clamping group and the second clamping group respectively comprise a plurality of cross rod clamping units which are arranged at intervals along the second direction of the mounting surface in sequence, the third clamping group comprises a plurality of vertical rod clamping units which are arranged at intervals along the second direction in sequence, and the first direction is perpendicular to the second direction.

In the embodiment of the invention, the cross rod clamping unit comprises a first positioning column arranged on the base in a lifting manner and a pressing plate arranged on the first positioning column, and a clamping opening for accommodating a rod piece of the crane railing is formed between the pressing plate and the base.

In the embodiment of the invention, the base is provided with a connecting hole with an internal thread, and the lower end of the first positioning column is provided with an external thread matched with the internal thread.

In the embodiment of the invention, the base comprises a base body provided with a first mounting hole and a threaded shaft sleeve embedded in the first mounting hole, and the threaded shaft sleeve is provided with a connecting hole.

In the embodiment of the invention, the pressing plate is provided with a first sleeving hole for the first positioning column to penetrate through, and the cross rod clamping unit further comprises a positioning shaft sleeve sleeved on the first positioning column and positioned between the base and the pressing plate.

In the embodiment of the invention, the cross rod clamping unit further comprises a rotating handle positioned on one side of the pressure plate, which is far away from the positioning shaft sleeve, the rotating handle comprises an installation part and a handheld part, the installation part is provided with the second sleeving hole, the handheld part is connected with the installation part, and the installation part is sleeved on the first positioning column through the second sleeving hole.

In the embodiment of the invention, the cross rod clamping unit further comprises a second positioning column arranged on the base, and the second positioning column is positioned at one end of the pressing plate far away from the first positioning column.

In the embodiment of the invention, the base comprises a base body provided with a second mounting hole and a first mounting shaft sleeve embedded in the second mounting hole, and the second positioning column penetrates through the first mounting shaft sleeve.

In the embodiment of the invention, the clamping assembly further comprises a fourth clamping group, the first clamping group, the third clamping group, the second clamping group and the fourth clamping group are sequentially arranged in four rows at intervals along the first direction of the mounting surface, and the fourth clamping group comprises a plurality of vertical rod clamping units which are sequentially arranged at intervals along the second direction of the mounting surface.

In the embodiment of the invention, the clamping assembly further comprises a third positioning column detachably arranged on the base, and the third positioning column is used for supporting the positioning block of the crane railing.

Through the technical scheme, the welding clamp for the crane railing provided by the embodiment of the invention has the following beneficial effects:

the welding fixture for the crane railing comprises a base and a clamping assembly, wherein a mounting surface is formed on the base, the clamping assembly is arranged on the mounting surface and comprises a first clamping group, a second clamping group and a third clamping group which are arranged at intervals along the first direction of the mounting surface, the first clamping group and the second clamping group respectively comprise a plurality of transverse rod clamping units which are sequentially arranged at intervals along the second direction of the mounting surface, then the corresponding transverse rod clamping units can be selected in the first clamping group to assemble and position the first transverse rods of the crane railing according to the size specification of the crane railing, the corresponding transverse rod clamping units can be selected in the second clamping group to assemble and position the second transverse rods of the crane railing, the third clamping group comprises a plurality of vertical rod clamping units which are sequentially arranged at intervals along the second direction, the first direction is perpendicular to the second direction, and then the corresponding vertical rod clamping units can also be selected in the third clamping group according to the size specification of the crane railing The rods are positioned, so that welding and assembling of crane railings with different sizes and specifications can be achieved, and the purpose of improving the universality of the welding clamp is achieved.

Additional features and advantages of the invention will be set forth in the detailed description which follows.

Drawings

The accompanying drawings, which are included to provide an understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without limiting the invention. In the drawings:

FIG. 1 is a schematic view of a 3 meter long crane rail according to an embodiment of the present invention;

FIG. 2 is a schematic view of a 0.58 meter long crane rail according to an embodiment of the present invention;

FIG. 3 is a schematic structural view of a welding fixture for crane rails according to an embodiment of the present invention;

FIG. 4 is a schematic view of a 3 meter long crane rail mounted to a welding fixture according to an embodiment of the present invention;

FIG. 5 is a schematic view of a 0.58 meter long crane rail mounted to a welding fixture according to an embodiment of the present invention;

FIG. 6 is a schematic cross-sectional view of a portion of a crane rail mounted to a welding fixture in accordance with an embodiment of the present invention;

fig. 7 is a schematic cross-sectional view of another portion of a crane rail mounted to a welding fixture in accordance with an embodiment of the present invention.

Description of the reference numerals

1 base 11 seat body

12 screw thread axle sleeve 13 first installation axle sleeve

14 second installation axle sleeve 2 horizontal pole clamping unit

21 first positioning column 22 pressure plate

23 clamping opening 24 positioning shaft sleeve

25 rotating handle 251 mounting part

252 second positioning column for handhold part 26

261 first shaft part 262 first head part

3 third positioning column 31 second body part

32 second head 4 crane rail

41 first crossbar 42 second crossbar

43 vertical rod 44 positioning block

5 first clamping group 6 second clamping group

7 third clamping group 8 fourth clamping group

9 vertical rod clamping unit

Detailed Description

The following detailed description of specific embodiments of the invention refers to the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative and explanatory of the invention and are not restrictive thereof.

The crane railing is an indispensable safety protection component of the crane, and the crane railing is generally formed by welding and assembling section steel or pipe materials. The traditional welding assembly mode is as follows: put into all member bars of railing and carry out whole pendulum welding in the draw-in groove to the frock base, because the size of draw-in groove is fixed, therefore can only make the hoist railing of a specification, the commonality is lower. Meanwhile, the rod piece is directly accommodated in the clamping groove and is positioned without a tool, the railing rod piece is bent after integral swing welding, the deformation is large, subsequent assembly is influenced, and in addition, the positioning block of the railing is subjected to scribing swing welding after integral swing welding and is positioned without the tool.

It should be particularly noted that, as shown in fig. 1 and fig. 2, the crane balustrade 4 includes a first cross bar 41 and a second cross bar 42 which are arranged in parallel at intervals, at least two vertical bars 43 which are arranged in parallel at intervals, and a positioning block 44 which is arranged on the vertical bars 43, the length of the first cross bar 41 is equal to that of the second cross bar 42, each vertical bar 43 of the at least two vertical bars 43 is connected with the first cross bar 41 and the second cross bar 42, and each vertical bar 43 is arranged perpendicular to the first cross bar 41 and the second cross bar 42, as shown in fig. 1, fig. 1 can be a crane balustrade 4 with a length dimension of 3 meters, five vertical bars 43 exist in the crane balustrade 4 with a length dimension of 3 meters, two vertical bars 43 at two ends are arranged between the first cross bar 41 and the second cross bar 42, no positioning block 44 is arranged on two vertical bars 43 at two ends, one end of three vertical bars 43 in the middle is arranged to extend out of the second cross bar 42, and a positioning block 44 is arranged at one end of at least one vertical rod 43 extending out of the second cross rod 42, as shown in fig. 2, fig. 2 can be a crane rail 4 with 0.58 m, only two vertical rods 43 are arranged on the crane rail 4 with 0.58 m, the two vertical rods 43 are respectively arranged at two ends of the crane rail 4 and extend out of the second cross rod 42, and a positioning block 44 is arranged at one end extending out of the second cross rod 42.

The welding jig for a crane rail according to the present invention will be described with reference to the accompanying drawings.

As shown in fig. 3 to 6, in an embodiment of the present invention, there is provided a welding jig for a crane rail, wherein the welding jig for a crane rail includes: the clamping device comprises a base 1 and a clamping assembly; the base 1 is provided with a mounting surface; the clamping assembly is arranged on the mounting surface and comprises a first clamping group 5, a second clamping group 6 and a third clamping group 7 which are arranged along the first direction of the mounting surface at intervals, the first clamping group 5 and the second clamping group 6 respectively comprise a plurality of cross rod clamping units 2 which are arranged along the second direction of the mounting surface at intervals in sequence, the third clamping group 7 comprises a plurality of vertical rod clamping units 9 which are arranged along the second direction at intervals in sequence, and the first direction is perpendicular to the second direction. In particular, the mounting surface of the base may be provided in a direction, and the first direction of the mounting surface may be a longitudinal direction of the mounting surface, and the second direction of the mounting surface may be a width direction of the mounting surface.

In the embodiment of the invention, the welding fixture for the crane handrail comprises a base 1 and a clamping assembly, wherein the base 1 is provided with an installation surface, the clamping assembly is arranged on the installation surface and comprises a first clamping group 5, a second clamping group 6 and a third clamping group 7 which are arranged along the first direction of the installation surface at intervals, the first clamping group 5 and the second clamping group 6 respectively comprise a plurality of cross rod clamping units 2 which are sequentially arranged along the second direction of the installation surface at intervals, so that the corresponding cross rod clamping units 2 can be selected from the first clamping group 5 to assemble and position a first cross rod 41 of the crane handrail 4 according to the size specification of the crane handrail 4, the corresponding cross rod clamping units 2 can be selected from the second clamping group 6 to assemble and position a second cross rod 42 of the crane handrail 4, the third clamping group 7 comprises a plurality of vertical rod clamping units 9 which are sequentially arranged along the second direction at intervals, and the first direction is perpendicular to the second direction, then also can select corresponding montant clamping unit 9 to fix a position the montant 43 of crane railing 4 in third clamping group 7 according to the size specification of crane railing 4 to can realize the welding equipment of the crane railing 4 of different size specifications, in order to reach the purpose that improves the commonality of welding jig.

As shown in fig. 4, all the cross rod clamping units 2 in the first clamping group 5 may be selected to assemble and position the first cross rod 41 of the crane rail 4 with a length of 3 meters, all the cross rod clamping units 2 in the second clamping group 6 may be selected to assemble and position the second cross rod 42 of the crane rail 4 with a length of 3 meters, and five vertical rod clamping units 9 in the third clamping group 7 corresponding to five vertical rods 43 of the crane rail 4 with a length of 3 meters may be selected to respectively assemble and position five vertical rods 43. As shown in fig. 5, two adjacently disposed cross bar clamping units 2 in the first clamping group 5 may be selected to assemble and position a first cross bar 41 of a 0.58 m crane rail 4, two adjacently disposed cross bar clamping units 2 in the second clamping group 6 may be selected to assemble and position a second cross bar 42 of the 0.58 m crane rail 4, and two vertical bar clamping units 9 corresponding to two vertical bars 43 of the 0.58 m crane rail 4 in the third clamping group 7 may be selected to respectively assemble and position two vertical bars 43.

Referring to fig. 3 and 6, in the embodiment of the present invention, the crossbar clamping unit 2 includes a first positioning post 21 disposed on the base 1 in a liftable manner and a pressing plate 22 disposed on the first positioning post 21, and a clamping opening 23 for receiving a rod of the crane handrail 4 is formed between the pressing plate 22 and the base 1. The pressing plate 22 can be abutted against the crane railing 4 by adjusting the first positioning column 21, so that the first cross rod 41 or the second cross rod 42 of the crane railing 4 can be reliably pressed on the base 1, and the phenomenon that the rod is bent and deformed greatly due to the fact that no tool is used for positioning the rod can be avoided.

It should be particularly noted that the structures of the plurality of cross bar clamping units 2 in the first clamping group 5, the plurality of cross bar clamping units 2 in the second clamping group 6, and the plurality of vertical bar clamping units 9 in the third clamping group 7 may be identical, except that the plurality of cross bar clamping units 2 in the first clamping group 5 are used for assembling and positioning the first cross bar 41 of the crane rail 4, the plurality of cross bar clamping units 2 in the second clamping group 6 are used for assembling and positioning the second cross bar 42 of the crane rail 4, the plurality of vertical bar clamping units 2 in the third clamping group 7 are used for assembling and positioning at least two vertical bars 43 of the crane rail 4, since the extending directions of the first cross bar 41 and the second cross bar 42 are parallel to each other, the extending directions of the at least two vertical bars 43 are perpendicular to the extending directions of the first cross bar 41 and the second cross bar 42, thus, the mounting direction of the plurality of cross bar clamping units 2 in the first clamping group 5 and the mounting direction of the plurality of cross bar clamping units 2 in the second clamping group 6 are the same, and the mounting direction of the plurality of vertical bar clamping units 9 in the third clamping group 7 is different from the mounting direction of the plurality of cross bar clamping units 2 in the first clamping group 5. That is, the vertical rod clamping unit 9 also includes a first positioning post 21 disposed on the base 1 in a liftable manner and a pressing plate 22 disposed on the first positioning post 21, a clamping opening 23 for accommodating a rod of the crane handrail 4 is formed between the pressing plate 22 and the base 1, only the first positioning post 21 of the horizontal rod clamping unit 2 is disposed on the upper side and the lower side of the first horizontal rod 41 or the second horizontal rod 42, and the first positioning post 21 of the vertical rod clamping unit 9 is disposed on the left side and the right side of the vertical rod 43. The following will describe in detail the specific structure of the horizontal rod clamping unit 2, and the structures of the vertical rod clamping unit 9 and the horizontal rod clamping unit 2 may be identical, so that the vertical rod clamping unit 9 will not be described in detail.

In the embodiment of the present invention, the base 1 is formed with a connection hole having an internal thread, and the lower end of the first positioning column 21 is formed with an external thread engaged with the internal thread. That is, the first positioning column 21 can be disposed on the base 1 by means of screw connection, and the lifting motion of the first positioning column 21 can be realized. Of course, the present invention is not limited thereto, and the first positioning column 21 may be provided on the base 1 by a lifting mechanism.

In the embodiment of the present invention, the base 1 includes a base body 11 having a first mounting hole and a threaded shaft sleeve 12 embedded in the first mounting hole, and the threaded shaft sleeve 12 has a connecting hole. The connecting hole that is formed with the internal thread promptly sets up on screw thread axle sleeve 12, and screw thread axle sleeve 12 can be interference fit with seat body 11, then under the excessive condition of internal thread wearing and tearing appear, can be convenient for change and maintain.

In the embodiment of the present invention, the pressing plate 22 is provided with a first engaging hole for the first positioning post 21 to pass through, and the cross bar clamping unit 2 further includes a positioning shaft sleeve 24 that is engaged with the first positioning post 21 and is located between the base 1 and the pressing plate 22. That is, the two ends of the positioning shaft sleeve 24 can be respectively abutted against the base 1 and the pressing plate 22 in a one-to-one correspondence manner, the height of the positioning shaft sleeve 24 is matched with the diameter of the corresponding rod piece of the crane handrail 4, and the positioning shaft sleeve 24 with different sizes can be replaced to adapt to crane handrails 4 with different sizes, so that the universality of the welding fixture is further improved.

In the embodiment of the present invention, the crossbar clamping unit 2 further includes a rotating handle 25 located on a side of the pressing plate 22 away from the positioning sleeve 24, the rotating handle 25 includes a mounting portion 251 formed with a second sleeve hole and a handheld portion 252 connected to the mounting portion 251, and the mounting portion 251 is sleeved on the first positioning column 21 through the second sleeve hole. The first positioning column 21 can be lifted and lowered on the base 1 by rotating the hand-held portion 252 of the hand-held rotating handle 25, so as to facilitate the operation.

In the embodiment of the present invention, the cross bar clamping unit 2 further includes a second positioning column 26 disposed on the base 1, and the second positioning column 26 is located at an end of the pressing plate 22 away from the first positioning column 21. That is, the second positioning column 26 and the first positioning column 21 are arranged at an interval, and a gap between the first positioning column 21 and the second positioning column 26 can be used for accommodating a rod of the crane handrail 4, so as to further assemble and position the crane handrail 4. Specifically, the first positioning column 21 and the second positioning column 26 of the cross bar clamping unit 2 in the first clamping group 5 are respectively disposed on the upper side and the lower side of the first cross bar 41, and the first positioning column 21 and the second positioning column 26 of the cross bar clamping unit 2 in the second clamping group 6 are respectively disposed on the upper side and the lower side of the second cross bar 42. More specifically, the first positioning posts 21 of the crossbar clamping unit 2 in the first clamping group 5 are located on the lower side of the first crossbar 41, and the first positioning posts 21 of the crossbar clamping unit 2 in the second clamping group 6 are located on the lower side of the second crossbar 42.

In the embodiment of the present invention, the base 1 includes a base body 11 having a second mounting hole and a first mounting sleeve 13 embedded in the second mounting hole, and the second positioning column 26 is inserted into the first mounting sleeve 13. I.e. in the case of excessive wear of the inner bore of the first mounting bush 13, replacement and maintenance can be facilitated.

Specifically, the second positioning column 26 includes a first body portion 261 and a first head portion 262 disposed on the first body portion 261, the first body portion 261 is disposed in the first mounting sleeve 13, and the first head portion 262 extends out of the first mounting sleeve 13 and is used for abutting against the first cross rod 41, the second cross rod 42 or the vertical rod 43. Second positioning columns 26 with first heads 262 of different sizes can be provided for adapting to the bars of cranes 4 of different diameters, further achieving the purpose of improving the versatility of the welding jig.

Referring to fig. 3 to 6 again, in the embodiment of the present invention, the clamping assembly further includes a fourth clamping group 8, the first clamping group 5, the third clamping group 7, the second clamping group 6, and the fourth clamping group 8 are sequentially arranged in four rows at intervals along the first direction of the mounting surface, and the fourth clamping group 8 includes a plurality of vertical rod clamping units 9 sequentially arranged at intervals along the second direction of the mounting surface. The first clamping group 5, the third clamping group 7, the second clamping group 6 and the fourth clamping group 8 are sequentially arranged in four rows at intervals, a plurality of vertical rod clamping units 9 in the third clamping group 7 can be used for assembling and positioning vertical rods 43 between the first cross rod 41 and the second cross rod 42, and a plurality of vertical rod clamping units 9 in the fourth clamping group 8 can further assemble and position vertical rods 43 extending out of the second cross rod 42.

As shown in fig. 3 and 7, in the embodiment of the present invention, the clamping assembly further includes a third positioning column 3 detachably disposed on the base 1, and the third positioning column 3 is used for supporting the positioning block 44 of the crane railing 4. The third positioning column 3 can assemble and position the positioning block 44 of the crane railing 4. Meanwhile, the positioning block 44 of the crane balustrade 4 is generally disposed at one end of the vertical rod 43 of the crane balustrade 4 extending out of the second cross rod 42, and the third positioning column 3 can be disposed close to the vertical rod clamping unit 9 in the fourth clamping group 8. Specifically, after the first cross rod 41, the second cross rod 42 and the vertical rod 43 of the crane railing 4 are assembled and positioned, the positioning block 44 may be placed on the third positioning column 3 and arranged close to the vertical rod 43, and then the positioning block 44 is subjected to swing welding.

Further, the base 1 includes a seat body 11 provided with a third mounting hole and a second mounting shaft sleeve 14 embedded in the third mounting hole, and the third positioning column 3 is inserted into the second mounting shaft sleeve 14. I.e. in the event of excessive wear of the inner bore of the second mounting bush 14, replacement and maintenance may be facilitated.

Furthermore, the third positioning column 3 includes a second shaft portion 31 and a second head portion 32 disposed on the second shaft portion 31, the second shaft portion 31 is disposed in the second mounting sleeve 14, and the second head portion 32 extends out of the second mounting sleeve 14 and is used for supporting the positioning block 44. The third positioning columns 3 with the second heads 32 of different sizes can be arranged to adapt to the installation positions of the positioning blocks 44 on the vertical rods 43 of different diameters, so as to further achieve the purpose of improving the universality of the welding fixture. In addition, the third positioning column 3 ensures that the positioning block 44 is aligned with the center of the vertical rod 43 for installation.

In the embodiment of the present invention, the seat body 11 may include two base plates disposed in parallel at an interval and a supporting plate disposed in parallel at an interval between the two base plates, and the first mounting hole, the second mounting hole and the third mounting hole may all be opened on the base plate at the upper end of the supporting plate away from the supporting plate, so that the lower ends of the first positioning column 21, the second positioning column 26 and the third positioning column 3 extend out of the gap between the two base plates.

In the description of the present invention, it is to be understood that the terms "first", "second" and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; may be mechanically coupled, may be electrically coupled or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.