High-precision positioning clamp for installing and welding cab roof

Abstract

The utility model discloses a high-precision positioning clamp for installing and welding a cab roof, and belongs to the technical field of positioning clamps. Comprising a concave base, a vehicle framework is arranged above the concave base, multi-axis robot arms are symmetrically arranged on the two sides of the concave base, a presumption plate is arranged at one ends of the multi-axis robot arms, butt joint assemblies are evenly arranged on one side of the presumption plate, and side skin is adsorbed to the two butt joint assemblies. A vehicle framework positioning hole penetrates through a positioning column to be installed, an electric push rod is started, the electric push rod pushes upwards to drive a double-connecting-shaft plate and a lower pressing pad on the two sides of a connecting piece to send linkage motion, the lower pressing pads on the two sides are driven to be pressed between the two positioning holes of the vehicle framework to be fixed, and it is guaranteed that the vehicle framework is accurately positioned and clamped.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of positioning fixtures, in particular to a high-precision positioning fixture for assembling and welding a cab roof. BACKGROUND

[0002] The cab roof is assembled and welded by a framework and a skin, the cab roof component is made by a three-dimensional bending process, the structure is complex and variable, and the size of the part is difficult to measure, the design tool is obtained by a steel fixed method and a welding reverse deformation dimension superposition method, the cab roof framework is assembled and positioned, and the cab roof meets the process requirements.

[0003] In the related art, in order to solve the problem of low welding precision, the patent with the publication number CN113478146A provides a crank arm positioning assembly of a main shaft welding fixture, which comprises a supporting piece, a first fastener and a second fastener. The second fastening surface is inclined relative to the plane perpendicular to the first direction. The second fastener can move from the release position to the clamping position. In the clamping position, each second fastening surface is opposite to a first fastening surface along the first direction. During the movement of the second fastener from the release position to the clamping position, the minimum gap between the second fastening surface and the first fastening surface along the first direction gradually decreases.

[0004] Although the minimum gap between the second fastening surface and the first fastening surface along the first direction gradually decreases in the above-mentioned prior art, the positioning precision is high, but the existing cab roof assembling and welding positioning fixture has a complex structure and is difficult to operate. When the positioning precision is not enough, the position deviation of the welded part is easy to occur, the welding gap is increased, the assembly and the structural strength are affected, and the quality of the cab roof does not meet the standard.

[0005] Therefore, the high-precision positioning fixture for assembling and welding a cab roof is provided. CONTENT OF THE UTILITY MODEL

[0006] 1. Technical problem to be solved

[0007] The purpose of the application is to provide a high-precision positioning fixture for assembling and welding a cab roof, which solves the technical problems of the existing cab roof assembling and welding positioning fixture, such as complex structure, difficult operation, insufficient positioning precision, position deviation of the welded part, increased welding gap, affected assembly and structural strength, and substandard quality of the cab roof, and achieves the technical effect of rapid and high-precision positioning of the cab roof components.

[0008] 2. Technical scheme

[0009] The application provides a driver's cab roof assembly welding high-precision positioning clamp, which comprises a concave base, a vehicle framework is arranged above the concave base, multi-axis robot arms are symmetrically arranged on the two sides of the concave base, a pushing plate is arranged at one end of the multi-axis robot arms, a butt joint assembly is uniformly arranged on one side of the pushing plate, and two side skins are adsorbed on the two butt joint assemblies; a clamping assembly is symmetrically arranged on the two sides of the concave base and clamps and positions the vehicle framework inside, the clamping assembly comprises an electric push rod, a connecting piece is arranged at the top end of the electric push rod, limit plates are rotationally arranged on the two sides of the connecting piece, support blocks are fixedly arranged on the two sides of the concave base, double connecting shaft plates are obliquely rotationally arranged on the two sides of the support blocks, and the double connecting shaft plates are rotationally connected with the limit plates on the upper ends.

[0010] Preferably, positioning columns are fixedly arranged on the two sides of the clamping assembly at the top end of the concave base, and positioning holes are formed in the vehicle framework.

[0011] Preferably, the butt joint assembly comprises a shock absorber fixedly connected with the pushing plate, an air channel is arranged on one side of the shock absorber, and an air nozzle is arranged at one end of the air channel.

[0012] Preferably, a three-dimensional piece is arranged on one side of the concave base, and a rotating part is arranged in the middle of the three-dimensional piece.

[0013] Preferably, a hydraulic rod is arranged at the top end of the three-dimensional piece, a suction disc piece is arranged at the bottom end of the hydraulic rod, and an upper skin is adsorbed and arranged at the bottom end of the suction disc piece.

[0014] Preferably, notches are formed below the two sides of the limit plates, and a pressing pad is arranged below the notches.

[0015] 3. Beneficial effects

[0016] One or more technical solutions provided in the embodiments of the application have at least the following technical effects or advantages:

[0017] (1) The clamping assembly is arranged in the application, the positioning hole of the vehicle framework is installed through the positioning column, the electric push rod is started, the electric push rod is pushed upward, the double connecting shaft plates and the pressing pads on the two sides of the connecting piece are sent to linkage movement, the pressing pads on the two sides are pressed between the two positioning holes of the vehicle framework to be fixed, and the vehicle framework is accurately positioned and clamped.

[0018] (2) The butt joint assembly is arranged in the application, the shock absorber reduces shaking and deviation during movement and butt joint, realizes accurate butt joint with the vehicle framework, relies on the adsorption force of the air nozzle to fix the side skin covering the vehicle framework for welding, and compared with some complex fixed clamp tooling, the operation is simple, time-saving and labor-saving. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1It is the first three-dimensional structure schematic view of the utility model;

[0020] Figure 2 It is the second three-dimensional structure schematic view of the utility model;

[0021] Figure 3 It is the three-dimensional structure schematic view of the clamping assembly of the utility model;

[0022] Figure 4 It is the Figure 2 It is the local structure enlarged schematic view of A place in the middle;

[0023] Figure 5 It is the three-dimensional structure schematic view of the butt joint assembly of the utility model;

[0024] Mark number explanation: 110, concave base; 111, positioning column; 120, three-dimensional piece; 121, hydraulic rod; 122, sucking disc piece; 130, multi-shaft machine arm; 131, push plate; 140, butt joint assembly; 141, air passage; 142, air nozzle; 143, shock absorber; 150, car framework; 151, side skin; 152, upper skin; 200, clamping assembly; 210, electric push rod; 211, connecting piece; 212, support block; 213, double connecting shaft plate; 214, limiting plate; 215, downward pressing pad. DETAILED DESCRIPTION

[0025] The application is further explained in detail in connection with the accompanying drawings of the specification.

[0026] Example one

[0027] Please refer to Figures 1-5The utility model provides a kind of embodiment: driver's cab roof group welding high-precision positioning fixture, including concave base 110, concave base 110 upper portion is provided with car skeleton 150, concave base 110 both sides are provided with multiple-axis robot arm 130 symmetrically, multiple-axis robot arm 130 one end is provided with push plate 131, push plate 131 one side is evenly provided with docking assembly 140, two docking assembly 140 are adsorbed with side skin 151;Concave base 110 top end clamping assembly 200 both sides are fixedly provided with positioning column 111, the inside of car skeleton 150 is provided with positioning hole, clamping assembly 200, clamping assembly 200 is symmetrically set in the both sides of concave base 110, by clamping assembly 200 clamping positioning in the inside of car skeleton 150, clamping assembly 200 includes electric push rod 210, electric push rod 210 top end is provided with connecting piece 211, connecting piece 211 both sides are rotatably provided with limit plate 214, electric push rod 210 both sides concave base 110 are fixedly provided with support block 212, support block 212 both sides are obliquely rotatably provided with double connecting shaft plate 213, double connecting shaft plate 213 upper end is rotatably connected with the both sides of limit plate 214, the both sides of limit plate 214 are provided with notch below, and notch is provided with lower pad 215 below. First, positioning installs car skeleton 150, installs car skeleton 150 positioning hole through positioning column 111, starts electric push rod 210, electric push rod 210 is pushed upwards, drives the double connecting shaft plate 213 and lower pad 215 of the both sides of connecting piece 211 to send linkage motion, drives the lower pad 215 of the both sides and is fixed between the two positioning holes of car skeleton 150, guarantees that car skeleton 150 is accurately positioned and clamped, and it is convenient for side skin 151 and upper skin 152 to be accurately moved to the corresponding position for covering from top and side by suction cup, then welding is carried out at the junction, electric push rod 210 is contracted to the end portion downwards, connecting piece 211 moves downwards and drives the rotation of the both sides of limit plate 214, two limit plates 214 are folded upwards along arc, to facilitate the dismounting of car skeleton 150 after welding.

[0028] Further, docking assembly 140 includes the shock absorber 143 fixedly connected with push plate 131, the shock absorber 143 one side is provided with air passage 141, and the air passage 141 one end is provided with air nozzle 142. Air passage 141 connecting pipeline, air nozzle 142 can effectively fix adsorption side skin 151, shock absorber 143 reduces shaking and deviation in the process of moving and docking, realizes accurate and car skeleton 150 docking, relies on the adsorption force of air nozzle 142 to fix side skin 151 covering car skeleton 150 welding, compared with some complex fixed fixture tooling, simple operation, time saving and labor saving.

[0029] Further, the concave base 110 is provided with a three-dimensional part 120 on one side, the three-dimensional part 120 is provided with a rotating part in the middle, the three-dimensional part 120 is provided with a hydraulic rod 121 at the top end, the hydraulic rod 121 is provided with a suction cup part 122 at the bottom end, the suction cup part 122 is adsorbed with an upper skin 152 at the bottom end, the rotating part can drive the suction cup part 122 to adsorb the upper skin 152 from one side, and then rotate to the upper side of the car frame 150, the hydraulic rod 121 drives the suction cup part 122 to downwardly butt joint the upper skin 152 to the car frame 150, and the suction cup part 122 adopts the same suction cup adsorption principle to realize accurate butt joint positioning.

[0030] In summary, the driver's cabin roof assembly welding high-precision positioning fixture disclosed in the embodiment of the application is used, first, the car frame 150 is positioned and installed, the positioning hole of the car frame 150 is installed through the positioning column 111, the electric push rod 210 is started, the electric push rod 210 is pushed upward, drives the double connecting shaft plates 213 and the downward pressing pads 215 on both sides of the connecting part 211 to send linkage movement, drives the downward pressing pads 215 on both sides to be pressed between the two positioning holes of the car frame 150 to be fixed, ensures that the car frame 150 is accurately positioned and clamped, facilitates the side skin 151 and the upper skin 152 to be accurately moved to the corresponding positions through the suction cups from the upper side and the side to be covered, then welding is carried out at the connecting part, the electric push rod 210 is retracted at the end, the connecting part 211 moves downward to drive the limiting plates 214 on both sides to rotate, the two limiting plates 214 are folded upward along the arc, and the car frame 150 is convenient to disassemble after welding.

[0031] The air channel 141 is connected with a pipeline, the air nozzle 142 can effectively fix and adsorb the side skin 151, the shock absorber 143 reduces shaking and deviation in the moving and butt joint process, realizes accurate butt joint with the car frame 150, relies on the adsorption force of the air nozzle 142 to fix the side skin 151 to cover the car frame 150 for welding, the rotating part can drive the suction cup part 122 to adsorb the upper skin 152 from one side, then rotate to the upper side of the car frame 150, the hydraulic rod 121 drives the suction cup part 122 to downwardly butt joint the upper skin 152 to the car frame 150, and the suction cup part 122 adopts the same suction cup adsorption principle to realize accurate butt joint positioning.

[0032] The standard parts used in the utility model can be purchased from the market, the special-shaped parts can be ordered according to the description and the drawings, and the specific connection mode of each part adopts the conventional means such as bolts, rivets and welding in the prior art, the machinery, parts and equipment adopt conventional models in the prior art, and the circuit connection adopts the conventional connection mode in the prior art, which will not be described in detail here, and the contents not described in detail in the description belong to the prior art known to the person skilled in the art.

[0033] Although the utility model has been explained in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments or make equivalent replacement to part of the technical features, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A high-precision positioning fixture welded to the roof of the driver's cab, characterized in that: Comprising The concave base (110) is provided with a vehicle framework (150) above, and a plurality of shaft machine arms (130) are symmetrically arranged on both sides of the concave base (110), one end of the shaft machine arm (130) is provided with a inference board (131), and the inference board (131) is uniformly provided with a docking assembly (140) on one side, and two docking assemblies (140) are adsorbed with side skins (151); The clamping assembly (200) is symmetrically arranged on both sides of the concave base (110), and is clamped and positioned in the vehicle framework (150) through the clamping assembly (200), the clamping assembly (200) comprises an electric push rod (210), the top end of the electric push rod (210) is provided with a connecting piece (211), the connecting piece (211) is rotatably provided with a limiting plate (214) on both sides, and the concave base (110) is fixedly provided with a supporting block (212) on both sides of the electric push rod (210), and the supporting block (212) is rotatably provided with a double connecting shaft plate (213) on both sides.

2. The cab roof sub-assembly high precision positioning fixture according to claim 1, characterized in that: The concave base (110) is fixedly provided with a positioning column (111) on both sides of the clamping assembly (200) at the top end, and the vehicle framework (150) is provided with a positioning hole inside.

3. The cab roof sub-assembly high precision positioning fixture of claim 1, wherein: The docking assembly (140) comprises a shock absorber (143) fixedly connected with the inference board (131), the shock absorber (143) is provided with an air channel (141) on one side, and the air channel (141) is provided with an air nozzle (142) at one end.

4. The cab roof sub-assembly high precision positioning fixture of claim 1, wherein: The concave base (110) is provided with a three-dimensional part (120) on one side, and the three-dimensional part (120) is provided with a rotating part in the middle.

5. The cab roof sub-assembly high precision positioning fixture of claim 4, wherein: The top end of the three-dimensional part (120) is provided with a hydraulic rod (121), the bottom end of the hydraulic rod (121) is provided with a suction disc part (122), and the bottom end of the suction disc part (122) is adsorbed with an upper skin (152).

6. The cab roof sub-assembly high precision positioning fixture of claim 1, wherein: The limiting plate (214) is provided with a notch below both sides, and a downward pressing pad (215) is arranged below the notch.

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