Skin tensioning tool

Abstract

The utility model provides a skin tensioning tool which comprises a base, a skin clamping mechanism, a lead screw telescopic mechanism and a framework limiting telescopic seat, the skin clamping mechanism, the lead screw telescopic mechanism and the framework limiting telescopic seat are arranged on the base, and the skin clamping mechanism comprises a support and two skin clamping pincers fixedly connected to the support. The lead screw telescopic mechanism comprises a lead screw nut fixedly connected to the base and a lead screw connected to the lead screw nut, one end of the lead screw is rotationally connected with the support, the framework limiting telescopic base comprises a fixed part fixedly connected to the base and a telescopic part fixedly connected to the fixed part in a telescopic mode, and the telescopic part is used for abutting against the battery cover framework. The skin tensioning tool can achieve cold tensioning of the skin of the battery cover, enables the skin to have pretightening force, enables the skin to reduce stress deformation under high-temperature baking, enables the flatness to be improved, can be disassembled and assembled at any time for use, and has the advantages of being rapid in positioning, convenient to operate, good in stability, high in reliability and the like. And the product diversity can be met.

Description

Technical Field

[0001] The utility model belongs to the technical field of bus battery assembly, and in particular relates to a skin tensioning tool. Background Art

[0002] At present, in order to reduce costs and increase efficiency, the overall battery surface covering parts of the buses with roof-mounted batteries have been changed from fiberglass materials to pure iron or iron-aluminum mixed material structures, and the manufacturing process has been transformed from bonding processes to welding processes or riveting processes. The battery cover frame of the pure iron or iron-aluminum mixed material structure is covered with an integral skin. Since the volume of the battery cover cannot exceed the width of the bus roof, the plane size of most battery covers is about 2000mm*2700mm. In order to reduce the weight of the battery cover, a small-volume skeleton material is usually used when designing the battery cover skeleton, resulting in low rigidity of the skeleton itself. Due to the small size and low rigidity, the battery cover skin cannot be tensioned on large tensioning equipment. Therefore, the battery cover skin often has poor overall flatness after welding or riveting, with local wavy lines or depressions. It takes a long time to adjust the welding process and correct the shape after welding. The skin of the riveted battery cover cannot be corrected after riveting, so it can only be started all over again. Therefore, it is necessary to provide a new skin tensioning tool to realize the tensioning operation and rapid positioning of the battery cover skin of buses. Utility Model Content

[0003] The purpose of the utility model is to solve the deficiencies of the prior art and provide a skin tensioning tool that allows the battery cover skin itself to have a pre-tightening force, so that the skin flatness meets quality requirements and reduces stress deformation of the covering skin under high-temperature baking.

[0004] In order to achieve the above object, the technical solution of the utility model is implemented as follows:

[0005] The utility model provides a skin tensioning tool, comprising a base and a skin clamping mechanism, a lead screw telescopic mechanism, and a frame limit telescopic seat arranged on the base, the skin clamping mechanism comprising a bracket and two skin clamps fixedly connected to the bracket, the lead screw telescopic mechanism comprising a lead screw nut fixedly connected to the base and a lead screw connected to the lead screw nut, one end of the lead screw is rotatably connected to the bracket, the frame limit telescopic seat comprises a fixed part fixedly connected to the base and a telescopic part telescopically fixedly connected to the fixed part, and the telescopic part is used to press against the battery cover frame.

[0006] In one embodiment, the base includes a pedestal and a mounting seat detachably connected to the pedestal, and the skin clamping mechanism, the lead screw telescopic mechanism, and the frame limiting telescopic seat are arranged on the mounting seat.

[0007] In one embodiment, the mounting base is a rectangular bracket welded from straight channel steels, including two tall columns of equal length, two short columns of equal length, two long cross beams of equal length and three longitudinal beams of equal length. One long cross beam is connected between the two tall columns and one long cross beam is connected between the two short columns respectively. One longitudinal beam is connected between the tall column and the short column on the same side. One longitudinal beam is connected between the two long cross beams. The lead screw nut is fixedly connected to the long cross beam between the two tall columns, and the end of the lead screw close to the short column is rotatably connected to the bracket.

[0008] In one embodiment, the base is a support frame welded from straight channel steels, the top of the support frame is provided with a top connecting plate for connecting to the mounting seat, the bottom of the support frame is provided with a bottom connecting plate for fixing to the ground, and screw holes are provided on the top connecting plate and the bottom connecting plate.

[0009] In one embodiment, the lead screw telescopic mechanism further includes a sliding guide component, which includes a guide groove portion fixedly connected to the base and a sliding portion connected to the guide groove portion and capable of sliding in the telescopic direction of the lead screw, and one end of the sliding portion is fixedly connected to the bracket.

[0010] In one embodiment, the guide groove portion is a rectangular through groove with waist holes symmetrically opened on both sides, and the sliding portion includes a U-shaped slider and a connecting bolt. The connecting bolt passes through the U-shaped slider and the waist hole to slidably connect the U-shaped slider to the rectangular through groove.

[0011] In one embodiment, the bracket is a horizontal crossbar whose length direction is perpendicular to the extension and retraction direction of the lead screw.

[0012] In one embodiment, the lead screw telescopic mechanism includes two lead screw nuts and two corresponding lead screws.

[0013] In one embodiment, the skin clamping pliers includes upper teeth, lower teeth and an adjustment stud passing through the upper teeth and the lower teeth in sequence, and the adjustment stud is slidingly connected to the lower teeth and threadedly connected to the upper teeth to adjust the degree of clamping between the upper teeth and the lower teeth.

[0014] In one embodiment, the fixing portion is a U-shaped through groove with an opening facing downward, and the telescopic portion includes a fastening bolt and a rectangular block with adjustable waist holes symmetrically provided on both sides. Through holes are symmetrically provided on both sides of the U-shaped through groove, and the fastening bolt passes through the through holes and the adjustable waist holes to connect the rectangular block to the U-shaped through groove.

[0015] Compared with the prior art, the utility model has the beneficial effect of providing a skin tensioning tool that can be used for the battery cover of a bus, which solves the problem that the battery cover skin is small and cannot be tensioned by existing equipment. Due to the influence of the product structure, the battery cover skin covering the main body is easily deformed by heat after high-temperature baking. After being tensioned by the battery cover skin tensioning tool, the covering skin itself has a pre-tightening force, which can reduce the stress deformation of the covering skin under high-temperature baking, improve the flatness of the skin, and meet the quality requirements. The battery cover skin tensioning tool can be disassembled and assembled at any time for use, which can save a lot of time and reduce production costs. The battery cover skin can be cold-tensioned in different production environments and conditions, and has the advantages of rapid positioning, easy operation, good stability, and the ability to meet product diversity. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of an embodiment of a skin tensioning tooling of the utility model;

[0017] Figure 2 for Figure 1 The schematic diagram of the structure of the skin tensioning tooling from another angle is shown;

[0018] Figure 3 for Figure 2 A magnified view of the structure at center A;

[0019] Figure 4 for Figure 1 The diagram shows the structure of the skin tensioning tooling during tensioning operation, in which arrow a indicates the direction of skin tensioning.

[0020] Explanation of the reference numerals: 1 base, 11 base, 113 top connecting plate, 115 bottom connecting plate, 13 mounting seat, 131 high column, 133 low column, 2 skin clamping mechanism, 21 bracket, 23 skin clamping pliers, 231 upper clamp teeth, 233 lower clamp teeth, 235 adjusting studs, 237 rotating handle, 3 lead screw telescopic mechanism, 31 lead screw nut, 33 lead screw, 35 sliding guide component, 351 guide groove part, 353 sliding part, 355 waist hole, 4 skeleton limiting telescopic seat, 41 fixing part, 43 telescopic part, 431 fastening bolt, 433 distance adjusting waist hole, 435 rectangular block, 5 battery cover skin, 6 battery cover skeleton. DETAILED DESCRIPTION

[0021] Combined with reference Figure 1-4The present embodiment provides a skin tensioning tool for tensioning the skin of a battery cover of a passenger car, comprising a base 1 and a skin clamping mechanism 2, a lead screw telescopic mechanism 3, and a frame limit telescopic seat 4 arranged on the base 1. The skin clamping mechanism 2 comprises a bracket 21 and two skin clamping pliers 23 fixedly connected to the bracket 21. The lead screw telescopic mechanism 3 comprises two lead screw nuts 31 fixedly connected to the base 1, two lead screws 33 correspondingly connected to the two lead screw nuts 31, and a sliding guide member 35. One end of the lead screw 33 is rotatably connected to the bracket 21. The sliding guide member 35 comprises a guide groove portion 351 fixedly connected to the base 1 and a sliding portion 353 connected to the guide groove portion 351 and capable of sliding along the telescopic direction of the lead screw 33. One end of the sliding portion 353 is fixedly connected to the bracket 21. The frame limit telescopic seat 4 comprises a fixed portion 41 fixedly connected to the base 1 and a telescopic portion 43 telescopically fixedly connected to the fixed portion 41. The telescopic portion 43 is used to press against the battery cover frame. The base 1 includes a pedestal 11 and a mounting seat 13 detachably connected to the pedestal 11 . The skin clamping mechanism 2 , the lead screw telescopic mechanism 3 , and the frame limiting telescopic seat 4 are arranged on the mounting seat 13 .

[0022] In this embodiment, the bracket 21 is a horizontal crossbar whose length direction is perpendicular to the extension direction of the lead screw 33 and is made of straight steel. The skin clamp 23 includes an upper jaw 231, a lower jaw 233 and an adjustment stud 235 that passes through the upper jaw 231 and the lower jaw 233 in sequence. The adjustment stud 235 is slidably connected to the lower jaw 233 and is threadedly connected to the upper jaw 231. A rotating handle 237 is provided on the top of the adjustment stud 235. The degree of clamping between the upper jaw 231 and the lower jaw 233 can be adjusted by rotating the adjustment stud 235. In the sliding guide component 35, the guide groove portion 351 is a rectangular through groove with waist holes 355 symmetrically opened on both sides. The sliding portion 353 includes a U-shaped slider and a connecting bolt. The connecting bolt passes through the U-shaped slider and the waist hole 355 to slide the U-shaped slider on the rectangular through groove. The rectangular through groove is fixedly connected to a long cross beam fixedly connected between two short columns 133. The U-shaped slider is fixedly connected to the bracket 21. The bracket 21 moves under the pulling force of the screw 33, thereby causing the U-shaped slider to slide along the waist hole 355, thereby assisting the screw 33 in linear motion. In the skeleton limited telescopic seat 4, the fixed part 41 is a U-shaped through groove with an opening facing downward, which is fixedly connected to the mounting seat 13. The telescopic part 43 includes a fastening bolt 431 and a rectangular block 435 with adjustable waist holes 433 symmetrically provided on both sides. Through holes are symmetrically provided on both sides of the U-shaped through groove. The fastening bolts 431 pass through the through holes and the adjustable waist holes 433 to connect the rectangular block 435 to the U-shaped through groove. By controlling the tightness of the fastening bolts 431, the telescopic length of the telescopic part 43 can be adjusted. The adjustable waist holes 433 on the rectangular block 435 determine the adjustment margin.

[0023] In this embodiment, the mounting seat 13 is a rectangular bracket welded from straight channel steel, including two equal-length high columns 131, two equal-length short columns 133, two equal-length long beams and three equal-length longitudinal beams. A long beam is connected between the two high columns 131 and between the two short columns 133, a longitudinal beam is connected between the high column 131 and the short column 133 on the same side, and a longitudinal beam is connected between the two long beams, forming a structurally reliable skeleton. The lead screw nut 31 is fixedly connected to the long beam between the two high columns 131, the end of the lead screw 33 close to the short column 133 is rotatably connected to the bracket 21, and the guide groove portion 351 is fixedly connected to the long beam fixedly connected between the two short columns 133. The base 11 is a support frame welded by straight channel steel. The top of the support frame is provided with a top connecting piece 113 for connecting the mounting seat 13, and the bottom of the support frame is provided with a bottom connecting piece 115 for fixing to the ground. Screw holes are provided on the top connecting piece 113 and the bottom connecting piece 115. The top connecting piece 113 can be connected to the mounting seat 13 by a nut connection, and the bottom connecting piece 115 can be firmly connected to the ground by a chemical anchor bolt. The base 1 is designed in a manner that the base 11 and the mounting seat 13 are detachably connected. The whole is welded by straight channel steel, and the bottom is provided with a bottom connecting piece 115 for fixing to the ground. Based on this, the skin tensioning tooling of this embodiment can be disassembled and assembled at any time, which can save a lot of time and reduce production costs. The battery cover skin can be cold-tensioned under different production environments and conditions to meet the production needs of diverse tensioning products.

[0024] like Figure 4 As shown, when the battery cover frame is covered with a battery cover skin, one end of the battery cover skin 5 is fixed to the battery cover frame 6 by welding or riveting, and the other end of the battery cover skin 5 is clamped by two skin clamps 23, and then the frame limit telescopic seat 4 is adjusted. Specifically, the two fastening bolts 431 are first loosened, and then the rectangular block 435 is slid to abut against the battery cover frame 6, and then the two fastening bolts 431 are tightened to make the rectangular block 435 abut against the battery cover frame 6, and then the screw rod 33 is rotated for tensioning, so that the screw telescopic mechanism 3 drives the skin clamping mechanism 2 to move in the direction of arrow a to achieve cold tensioning of the battery cover skin 5, and the screw rod 33 can be self-locking after stopping rotation.

[0025] The skin tensioning tool of the utility model solves the problem that the battery cover skin is small and cannot be tensioned by existing equipment. Due to the influence of the product structure, the battery cover skin covering the main body is easily deformed by heat after high-temperature baking. After being tensioned by the battery cover skin tensioning tool, the covering skin itself has a pre-tightening force, which can reduce the stress deformation of the covering skin under high-temperature baking, improve the flatness of the skin and meet the quality requirements. The battery cover skin tensioning tool can be disassembled and assembled at any time for use, which can save a lot of time and reduce production costs. The battery cover skin can be cold-tensioned in different production environments and conditions, and has the advantages of rapid positioning, easy operation, good stability, and the ability to meet product diversity.

[0026] A person skilled in the art should understand that the discussion of any of the above embodiments is merely illustrative and is not intended to imply that the scope of protection of the present application is limited to these examples. In line with the concept of the present application, the technical features in the above embodiments or different embodiments may be combined, the steps may be implemented in any order, and there are many other variations of different aspects of one or more embodiments of the present application as described above, which are not provided in detail for the sake of simplicity.

[0027] One or more embodiments of the present application are intended to cover all such substitutions, modifications and variations that fall within the broad scope of the present application. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of one or more embodiments of the present application should be included in the protection scope of the present application.

Claims

1. A skin tensioning tool, characterized in that: The invention comprises a base (1) and a skin clamping mechanism (2), a lead screw telescopic mechanism (3) and a frame limit telescopic seat (4) arranged on the base (1); the skin clamping mechanism (2) comprises a bracket (21) and two skin clamping pliers (23) fixedly connected to the bracket (21); the lead screw telescopic mechanism (3) comprises a lead screw nut (31) fixedly connected to the base (1) and a lead screw (33) connected to the lead screw nut (31); one end of the lead screw (33) is rotatably connected to the bracket (21); the frame limit telescopic seat (4) comprises a fixed portion (41) fixedly connected to the base (1) and a telescopic portion (43) telescopically fixedly connected to the fixed portion (41); the telescopic portion (43) is used to press against the battery cover frame.

2. The skin tensioning tool as claimed in claim 1, characterized in that: The base (1) comprises a pedestal (11) and a mounting seat (13) detachably connected to the pedestal (11); the skin clamping mechanism (2), the lead screw telescopic mechanism (3), and the frame limit telescopic seat (4) are arranged on the mounting seat (13).

3. The skin tensioning tool as claimed in claim 2, characterized in that: The mounting seat (13) is a rectangular bracket welded from straight channel steel, comprising two equal-length tall columns (131), two equal-length short columns (133), two equal-length long cross beams and three equal-length longitudinal beams, one of the long cross beams being connected between the two tall columns (131) and between the two short columns (133), one of the longitudinal beams being connected between the tall columns (131) and the short columns (133) on the same side, and one of the longitudinal beams being connected between the two long cross beams, the lead screw nut (31) being fixedly connected to the long cross beam between the two tall columns (131), and the end of the lead screw (33) on the side close to the short column (133) being rotatably connected to the bracket (21).

4. The skin tensioning tool as claimed in claim 2, characterized in that: The base (11) is a support frame formed by welding straight channel steels, the top of the support frame is provided with a top connecting piece (113) for connecting to the mounting seat (13), the bottom of the support frame is provided with a bottom connecting piece (115) for fixing to the ground, and screw holes are provided on the top connecting piece (113) and the bottom connecting piece (115).

5. The skin tensioning tool as claimed in any one of claims 1 to 4, characterized in that: The lead screw telescopic mechanism (3) further comprises a sliding guide member (35), the sliding guide member (35) comprising a guide groove portion (351) fixedly connected to the base (1) and a sliding portion (353) connected to the guide groove portion (351) and capable of sliding in the telescopic direction of the lead screw (33), one end of the sliding portion (353) being fixedly connected to the bracket (21).

6. The skin tensioning tool as claimed in claim 5, characterized in that: The guide groove portion (351) is a rectangular through groove with waist holes (355) symmetrically provided on both sides, and the sliding portion (353) comprises a U-shaped slider and a connecting bolt, wherein the connecting bolt passes through the U-shaped slider and the waist hole (355) to slidably connect the U-shaped slider to the rectangular through groove.

7. The skin tensioning tool according to any one of claims 1 to 4, characterized in that: The bracket (21) is a horizontal crossbar whose length direction is perpendicular to the extension and retraction direction of the lead screw (33).

8. The skin tensioning tool according to any one of claims 1 to 4, characterized in that: The lead screw telescopic mechanism (3) comprises two lead screw nuts (31) and two corresponding lead screws (33).

9. The skin tensioning tool as claimed in any one of claims 1 to 4, characterized in that: The skin clamping pliers (23) include upper pliers (231), lower pliers (233) and an adjusting stud (235) passing through the upper pliers (231) and the lower pliers (233) in sequence; the adjusting stud (235) is slidably connected to the lower pliers (233) and is threadedly connected to the upper pliers (231) to adjust the degree of clamping between the upper pliers (231) and the lower pliers (233).

10. The skin tensioning tool according to any one of claims 1 to 4, characterized in that: The fixing portion (41) is a U-shaped through slot with an opening facing downwards, and the telescopic portion (43) comprises a fastening bolt (431) and a rectangular block (435) with adjustable waist holes (433) symmetrically provided on both sides, and through holes are symmetrically provided on both sides of the U-shaped through slot, and the fastening bolt (431) passes through the through holes and the adjustable waist holes (433) to connect the rectangular block (435) to the U-shaped through slot.

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