CN211759445U - A welding tool for low-floor tram underframe - Google Patents

Abstract

The utility model discloses an assembly welding tool for a low-floor tram underframe, which comprises a tool support, a plurality of positioning devices are arranged on the tool support, and the positioning devices on both sides are arranged mirror-symmetrically along the longitudinal center axis of the tool support; The rear end of each longitudinal support rod is provided with a beam positioning device, the middle and front end of each longitudinal support rod are provided with support and positioning devices for supporting end beams and hinge beams, and the left and right ends of the transverse support rod are provided with seat beam positioning devices The side support rod is provided with front side beam positioning components, side beam rear positioning components, side beam top tightening devices and side beam positioning devices in sequence from front to back; Beneficial effects: a plurality of positioning devices are provided, which can position and clamp different parts of the tram underframe, so that the parts are positioned accurately during welding, the installation is firm, the welding is not easy to make mistakes, and the welding is faster and more convenient.

Description

A welding tool for low-floor tram underframe

technical field

The utility model relates to the field of rail vehicles, in particular to an assembly welding tool for a low-floor tram underframe.

Background technique

The underframe structure is the bottom support structure of each car of the tram. Referring to the example in Figure 11 of the specification, the underframe consists of a hinged beam A1 at the front side, an end beam A2 at the rear end, and a seat located between the hinged beam A1 and the end beam A2. Beam A3, side beam A4 located on both sides of hinge beam A1 and end beam A2, beam A5 at the rear end of hinge beam A1, side beam A6 on both sides of beam A5, etc.

There are many parts to be welded on the chassis, so there are many positions and welding seams for the parts to be welded. During the welding process, thermal deformation and cooling shrinkage deformation after welding will occur, and the welding requirements such as positioning accuracy are high. In addition, the side beams 104 are relatively high, which is very inconvenient to fix. The conventional method of welding and assembling parts one by one is adopted in the prior art, which has low welding efficiency, inconvenient use, and low positioning accuracy between parts.

Utility model content

In view of the above-mentioned problems, the utility model provides a welding tool for the underframe of a low-floor tram. The technical solution adopted by the utility model for solving the technical problems is as follows:

An assembly welding tool for a low-floor tram undercarriage includes a tooling bracket, the tooling bracket includes end support rods at the front and rear ends, side support rods on the left and right sides, and a vertical support rod disposed between the support rods at the front and rear ends. A support rod, a transverse support rod is arranged between two adjacent longitudinal support rods, a plurality of positioning devices are arranged on the tooling bracket, and the positioning devices on both sides are arranged mirror-symmetrically along the longitudinal center axis of the tooling bracket; The rear end is provided with a cross beam positioning device, the middle and front end of each longitudinal support rod are provided with a support positioning device for supporting the end beam and the hinge beam, and the left and right ends of the horizontal support rod are provided with seat beam positioning devices. The side beam front positioning assembly, the side beam rear positioning assembly, the side beam top tightening device and the side beam positioning device are sequentially arranged from front to back; the side beam front positioning assembly and the measuring beam rear positioning assembly have the same structure, including a left positioning device. , Side beam pressing device and right positioning device.

The above low-floor tram underframe assembly welding tool has at least the following beneficial effects: multiple positioning devices are provided, which can position and clamp different parts of the tram underframe, so that the parts can be positioned accurately during welding, the installation is firm, and the welding It is not easy to make mistakes, and welding is faster and more convenient.

According to the assembly welding tool for the underframe of a low-floor tram according to the utility model, the end support rod at the rear end is provided with an ejector pin, the tip of the ejector pin is vertically facing the front end of the tooling bracket, and the ejector pin can be centrally positioned, Ensure the flatness of beams and edge beams.

According to an assembly welding tool for a low-floor tram underframe according to the present invention, the cross beam positioning device includes a first positioning table and a cross beam pressing mechanism arranged at the front end of the first positioning table, the cross beam pressing The mechanism includes a first base that is detachably connected to the tooling bracket, and the upper end of the first base is provided with an adjustment screw that can move up and down, and the adjustment screw is located above the first positioning table. The cross beam is placed on the first positioning table to limit the position, and the cross beam is pressed on the first positioning table by the cross beam pressing mechanism, and the cross beam is positioned and clamped at the same time, which is very convenient.

According to an assembly welding tool for a low-floor tram underframe according to the present invention, the support and positioning device includes a second positioning platform fixed on the tool bracket, and a support is provided on one side of the second positioning platform. The other side is provided with a second base, the second base is detachably connected to the tooling bracket, the upper end of the second base is provided with an adjusting screw that can move up and down, and the adjusting screw is located above the second positioning table. The support column and the second positioning platform are used to limit the end beam and the hinge beam, and the adjusting screw is used to clamp the end beam and the hinge beam, so the installation is convenient and quick, and the positioning is accurate.

According to an assembly welding tool for a low-floor tram underframe according to the present invention, the seat beam positioning device includes a bottom beam support frame connected with a transverse support rod, and the upper end of the bottom beam support frame is provided with a transverse penetration The through holes are provided with fasteners in the through holes. The four corners of the seat beam are respectively fixed on the four bottom beam support frames through fasteners, and the seat beam can be fixed on the side beam and the end beam at the same time, and the installation and positioning are very convenient.

According to an assembly welding tool for a low-floor tram undercarriage according to the present invention, the left positioning device includes a third base connected with the tool support, a third support arranged on the third base, and the first The upper end of the three brackets is provided with an adjustment screw that can move left and right, and the right end of the third bracket is provided with a horizontally arranged right positioning plate. The left positioning device presses one side of the side beam on the right positioning plate to limit the position, prevents the side beam from shifting, and has a good fixing effect.

According to an assembly welding tool for a low-floor tram underframe according to the present invention, the right positioning device includes a fourth base connected with the tool support, a fourth support arranged on the fourth base, and the first The upper ends of the four brackets are provided with adjustment screws that can move left and right, and the left end of the fourth brackets is provided with a horizontally arranged left positioning plate. The right positioning device presses the other side of the side beam on the left positioning plate to limit the position, prevents the side beam from shifting, and has a good fixing effect.

According to an assembly welding tool for a low-floor tram underframe according to the present invention, the side beam pressing device comprises a fifth base connected with the tool support, a support frame located on the fifth base, and a support frame connected to the support frame. The upper end of the hinged arm is hinged, and the upper end of the hinged arm is provided with an adjusting screw that can move up and down. The pressing device can press the side beam on the fifth base, which ensures the flatness of the side beam and has a good limit and fixing effect.

According to an assembly welding tool for a low-floor tram undercarriage according to the present invention, the side beam tightening device comprises a sleeve connected to a side support rod, and a mounting rod located in the sleeve is located at the top end of the mounting rod and passes through There is an adjusting screw that can move left and right. Rotating the adjusting screw can press the side beam on the side support rod from the inside to realize the fast limit function.

According to an assembly welding tool for a low-floor tram underframe according to the present invention, the side beam positioning device comprises a sixth base connected with a side support rod, a sixth bracket located on the sixth base, and a sixth support on the sixth base. The upper end of the six brackets is provided with an adjustment screw that can move up and down. The side beam is pressed by the adjusting screw on the side support rod, which can ensure the smoothness of the side beam.

Description of drawings

In order to illustrate the technical solutions in the embodiments of the present invention more clearly, the following briefly describes the accompanying drawings that are used in the description of the embodiments. Obviously, the described drawings are only a part of the embodiments of the present invention, rather than all the embodiments, and those skilled in the art can also obtain other design solutions and drawings based on these drawings without creative work. :

Fig. 1 is the top view of the assembly welding tooling of the low-floor tram underframe of the utility model;

Fig. 2 is the front view of the welding tool of the utility model of the low-floor tram underframe;

Fig. 3 is the front view of the beam positioning device in the utility model;

4 is a front view of the supporting and positioning device in the utility model;

5 is a front view of the seat beam positioning device in the present invention;

Fig. 6 is the front view of the left positioning device in the utility model;

7 is a front view of the right positioning device in the utility model;

8 is a front view of the side beam pressing device in the utility model;

Fig. 9 is the front view of the middle side beam clamping device of the utility model;

10 is a front view of the middle side beam positioning device of the present invention;

11 is a schematic structural diagram of a bottom frame in the background art of the present invention.

Detailed ways

The concept, specific structure and technical effects of the present invention will be clearly and completely described below in conjunction with the embodiments and accompanying drawings, so as to fully understand the purpose, features and effects of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, those skilled in the art can obtain other embodiments without creative work, All belong to the scope of protection of the present invention.

Referring to FIGS. 1 to 10 , a welding tool for a low-floor tram undercarriage includes a tooling bracket 1, and the tooling bracket 1 includes end support rods 101 at the front and rear ends, side support rods 102 at the left and right sides, and The longitudinal support rods 103 are arranged between the support rods 101 at the front and rear ends, and a transverse support rod 104 is provided between two adjacent longitudinal support rods 103. The tooling bracket 1 is provided with a number of positioning devices, and the positioning devices on both sides are along the lines. The longitudinal center axis of the tooling bracket 1 is mirror-symmetrically arranged; the rear end of each longitudinal support rod 103 is provided with a beam positioning device 2, and the middle and front end of each longitudinal support rod 103 are provided with support and positioning devices for supporting end beams and hinge beams 3. The left and right ends of the transverse support rod 104 are provided with seat beam positioning devices 4, and the side support rods 102 are sequentially provided with front side beam positioning components, side beam rear positioning components, side beam top tightening devices 8 and side beams from front to back. Beam positioning device 9 ; the front positioning assembly of the side beam and the rear positioning assembly of the measuring beam have the same structure, and both include a left positioning device 5 , a side beam pressing device 6 and a right positioning device 7 .

An ejector pin 10 is disposed on the end support rod 101 at the rear end, and the tip of the ejector pin 10 faces the front end of the tooling bracket 1 vertically. The beam positioning device 2 includes a first positioning table 201 and a beam pressing mechanism disposed at the front end of the first positioning table 201. The beam pressing mechanism includes a first base 202 that is detachably connected to the tooling bracket 1. The upper end of a base 202 is provided with an adjusting screw 203 that can move up and down, and the adjusting screw 203 is located above the first positioning table 201 . Put the beam A5 on the first positioning table 201, use the thimble 10 for center positioning, and then determine the position of the outer direction of the beam A5 through the steps of the positioning table 201, and then use the adjusting screw 203 to press the beam A5 to assist vertical positioning to ensure Flatness with edge beams.

The support and positioning device 3 includes a second positioning table 301 fixed on the tooling bracket 1 , one side of the second positioning table 301 is provided with a support column 302 , the other side is provided with a second base 303 , and the second base 303 Removably connected to the tooling bracket 1 , the upper end of the second base 303 is provided with an adjusting screw 304 that can move up and down, and the adjusting screw 304 is located above the second positioning table 301 . The support and positioning device 3 is located below the four corners where the hinged beam A1, the end beam A2 and the side beam A4 are connected. The support column 302 lifts the tooling bracket 1, which can play a better centering effect, and then twist the adjusting screw 304 Fixing the end beam A2 and the hinge beam A1 on the second positioning platform 301 is very convenient for loading and unloading.

The seat beam positioning device 4 includes a bottom beam support frame 401 connected with the transverse support rod 104 , the upper end of the bottom beam support frame 401 is provided with a transversely penetrating through hole, and a fastener is passed through the through hole. Both sides of the seat beam A3 are connected to the bottom beam support frame 401 through fasteners, and the seat beam A3 is fixed on the tooling bracket 1 for position limit.

The left positioning device 5 includes a third base 501 connected to the tooling support 1, and a third support 502 arranged on the third base 501. The upper end of the third support 502 is provided with an adjustment screw 503 that can move left and right. The right end of the third bracket 502 is provided with a horizontally disposed right positioning plate 504 . The right positioning device 7 includes a fourth base 701 connected with the tooling support 1, a fourth support 702 arranged on the fourth base 701, and the upper end of the fourth support 702 is provided with an adjusting screw 703 that can move left and right, The left end of the fourth bracket 702 is provided with a horizontal left positioning plate 704 . The side beam pressing device 6 includes a fifth base 601 connected to the tooling bracket 1 , a support frame 602 located on the fifth base 601 , a hinged arm 603 hinged with the upper end of the support frame 602 , and the upper end of the hinged arm 603 passes through There is an adjustment screw 604 that can move up and down. The front and rear ends of the side beam A4 are clamped by the left positioning device 5 and the right positioning device 7. The left positioning plate 504 and the right positioning plate 704 are placed on the inner side of the side beam A4, and the adjusting screws 503 and 703 are used to press against the side beam A4. The outer surface fixes and limits the side beam A4 to ensure longitudinal positioning, and there are two positioning devices on both sides of the side beam A6, and then use the side beam pressing device 6 to press the side beam A4 to the left and right sides of the tooling bracket 1, The flatness of the side beam A4 is guaranteed.

The side beam tightening device 8 includes a sleeve 801 connected to the side support rod 102 , a mounting rod 802 located in the sleeve 801 , and an adjusting screw 803 that can move left and right is penetrated at the top of the mounting rod 802 . The side beam positioning device 9 includes a sixth base 901 connected to the side support rod 102 , a sixth bracket 902 located on the sixth base 901 , and an adjusting screw 903 that can move up and down is passed through the upper end of the sixth bracket 902 . The side beam A6 is used to connect the cross beam A5 and the end beam A2, the side beam pressing device 8 is used to press the side beam A6 on the side support rod 102, and the top has a pressing device to ensure the positioning in the height direction and assist the vertical positioning, Ensure the flatness of the edge beam A6.

The structure of the tooling bracket 1 can be flexibly adjusted according to the size of the chassis, which facilitates the disassembly and assembly of the tooling bracket 1. The modular design and universal fixture make the components common to multiple toolings, reducing the manufacturing cost. Both sides are equipped with a connectable positioner device, which is convenient for subsequent processing such as welding.

The above-mentioned embodiment is to further illustrate the above-mentioned content of the present utility model, but should not be construed as the scope of the above-mentioned subject matter of the present utility model is limited to the above-mentioned embodiment, and all technologies realized based on the above-mentioned content belong to the present utility model. range.

Claims (10)

1. a welding tool for a low-floor tram underframe, characterized in that: comprising: A tooling bracket (1), the tooling bracket (1) includes end support rods (101) at the front and rear ends, side support rods (102) at the left and right sides, and a vertical support rod (101) disposed between the support rods (101) at the front and rear ends. A support rod (103), a transverse support rod (104) is arranged between two adjacent longitudinal support rods (103), a plurality of positioning devices are provided on the tooling bracket (1), and the positioning devices on both sides are along the tooling bracket (1). ) is mirror-symmetrical to the longitudinal center axis; The rear end of each longitudinal support rod (103) is provided with a cross beam positioning device (2), the middle and front end of each longitudinal support rod (103) are provided with a support positioning device (3) for supporting the end beam and the hinge beam, The left and right ends of the support rod (104) are provided with seat beam positioning devices (4), and the side support rods (102) are sequentially provided with front side beam positioning components, side beam rear positioning components, and side beam top-tightening devices from front to rear. (8) and side beam positioning device (9); The front positioning assembly of the side beam and the rear positioning assembly of the measuring beam have the same structure, and both include a left positioning device (5), a side beam pressing device (6) and a right positioning device (7). 2 . The assembly welding tool for the underframe of a low-floor tram according to claim 1 , wherein a thimble ( 10 ) is provided on the end support rod ( 101 ) at the rear end, and the tip of the thimble ( 10 ) is vertical. 3 . straight towards the front of the tooling bracket (1). 3. The assembly welding tool for the underframe of a low-floor tram according to claim 1, wherein the beam positioning device (2) comprises a first positioning table (201) and a first positioning table (201) ) a beam pressing mechanism at the front end, the beam pressing mechanism includes a first base (202) detachably connected to the tooling bracket (1), and the upper end of the first base (202) is provided with an adjustment that can move up and down A screw (203), the adjusting screw (203) is located above the first positioning table (201). 4. The assembly welding tool for the underframe of a low-floor tram according to claim 1, wherein the supporting and positioning device (3) comprises a second positioning platform (301) fixed on the tooling bracket (1) One side of the second positioning table (301) is provided with a support column (302), and the other side is provided with a second base (303), the second base (303) is detachably connected with the tooling bracket (1), the first The upper ends of the two bases (303) are provided with adjustment screws (304) that can move up and down, and the adjustment screws (304) are located above the second positioning table (301). 5. The assembly welding tool for the underframe of a low-floor tram according to claim 1, wherein the seat beam positioning device (4) comprises a base beam support frame ( 401), the upper end of the bottom beam support frame (401) is provided with a transversely penetrating through hole, and the through hole is provided with a fastener. 6. The assembly welding tool for a low-floor tram underframe according to claim 1, wherein the left positioning device (5) comprises a third base (501) connected with the tool bracket (1), and is provided with A third bracket (502) on the third base (501), the upper end of the third bracket (502) is provided with an adjusting screw (503) that can move left and right, and the right end of the third bracket (502) is provided with a horizontal arrangement the right positioning plate (504). 7. The assembly welding tool for a low-floor tram underframe according to claim 1, wherein the right positioning device (7) comprises a fourth base (701) connected with the tool bracket (1), and is provided with A fourth bracket (702) on the fourth base (701), the upper end of the fourth bracket (702) is provided with an adjusting screw (703) that can move left and right, and the left end of the fourth bracket (702) is provided with a horizontal arrangement the left positioning plate (704). 8. The assembly welding tool for a low-floor tram underframe according to claim 1, characterized in that: the side beam pressing device (6) comprises a fifth base (601) connected with the tool bracket (1) , the support frame (602) located on the fifth base (601), the hinge arm (603) hinged with the upper end of the support frame (602), and the upper end of the hinge arm (603) is provided with an adjusting screw (604) that can move up and down ). 9 . The assembly welding tool for the underframe of a low-floor tram according to claim 1 , wherein the side beam tightening device ( 8 ) comprises a sleeve ( 801 ) connected to the side support rod ( 102 ). 10 . , an installation rod (802) located in the sleeve (801), and an adjusting screw (803) that can move left and right is passed through the top of the installation rod (802). 10. The assembly welding tool for a low-floor tram underframe according to claim 1, characterized in that: the side beam positioning device (9) comprises a sixth base (901) connected with a side support rod (102) , the sixth bracket (902) located on the sixth base (901), and the upper end of the sixth bracket (902) is provided with an adjustment screw (903) that can move up and down.

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