Welding jig for double connecting plates of forklift

Abstract

The utility model relates to a welding jig for double connecting plates of a forklift. The welding jig comprises a seat plate, a back frame fixed to the top of the seat plate, a first pressing assembly arranged on the front side of the back frame and a clamping assembly arranged on the front side of the back frame and located on the right side of the first pressing assembly. The first pressing assembly comprises a first supporting frame fixed to the back frame, a first pressing air cylinder rotationally connected to the first supporting frame, a first pressing rod rotationally connected to the first supporting frame and located on the right side of the first pressing air cylinder, and a pressing beam fixed to the right end of the first pressing rod. According to the utility model, the automation degree is relatively high, and manual operation is not needed, so that the operation steps are simplified, and the working efficiency is improved; in addition, the alignment accuracy of the two splice plates is ensured, displacement is prevented, and then the welding precision is improved.

Description

Technical Field

[0001] The utility model relates to a welding jig for a forklift double connecting plate. Background Art

[0002] A forklift is an industrial handling vehicle, referring to various wheeled handling vehicles for loading, unloading, stacking and short-distance transportation operations of palletized goods; the steering system of a forklift uses a relatively large number of welded parts, including a double connecting plate installed in front of the vehicle body to support the two front wheel axles.

[0003] The forklift double connecting plate is formed by welding two splicing plates. In order to ensure that the flanges of the two splicing plates are closely fitted during welding to eliminate gaps, it is usually necessary to clamp the flanges of the two plates in advance with the help of a supporting fixture.

[0004] The existing fixture for welding forklift double connecting plates has a low degree of automation and must rely on manual operation, so the operation steps are cumbersome, resulting in low work efficiency; in addition, the positioning of the two splicing plates is not accurate enough and the fixation is not firm enough, resulting in a low alignment accuracy of the two splicing plates and easy displacement, so the welding accuracy is low and needs to be further improved. Summary of the Utility Model

[0005] Aiming at the current situation of the above-mentioned existing technology, the technical problem to be solved by the utility model is to provide a welding jig for a forklift double connecting plate with a high degree of automation, which not only simplifies the operation steps to improve work efficiency, but also improves the welding accuracy.

[0006] The technical solution adopted by the utility model to solve the above technical problems is: a welding jig for a forklift double connecting plate, characterized by comprising a seat plate, a back frame fixed on the top of the seat plate, a first pressing assembly arranged on the front side of the back frame, and a clamping assembly arranged on the front side of the back frame and to the right of the first pressing assembly;

[0007] The first pressing assembly includes a first support frame fixed on the back frame, a first pressing cylinder rotatably connected to the first support frame, a first pressing rod rotatably connected to the first support frame and to the right of the first pressing cylinder, and a pressing beam fixed to the right end of the first pressing rod. The telescopic end of the first pressing cylinder is arranged forward and rotatably connected to the left end of the first pressing rod;

[0008] The first pressing assembly further includes a first support seat and a second support seat detachably fixed on the front side of the back frame and distributed vertically, a first cushion block and a second cushion block detachably fixed on the first support seat and the second support seat respectively, and a first pressing block and a second pressing block detachably fixed on the pressing beam and cooperating with the first cushion block and the second cushion block respectively;

[0009] The clamping assembly includes a base fixed to the front side of the backrest frame, a movable frame movably connected to the front side of the backrest frame to have the function of tilting up and down, a moving cylinder fixed to the base, and a clamping unit provided on the movable frame. The telescopic end of the moving cylinder is inclined upward to the left and rotatably connected to the movable frame;

[0010] The clamping unit includes a slider movably connected to the movable frame to have the function of tilting up and down, and a clamping cylinder fixed to the movable frame and located below the right side of the slider. The telescopic end of the clamping cylinder is inclined upward to the left and fixed to the slider;

[0011] The clamping unit further includes a first clamping rod and a second clamping rod. The middle parts of the first clamping rod and the second clamping rod are cross - arranged with each other and are rotatably and concentrically connected to the movable frame and are both located above the left side of the slider. The upper ends of the first clamping rod and the second clamping rod are respectively formed with a first clamping block and a second clamping block that cooperate with each other;

[0012] A guiding inclined surface is formed at the upper - front corner of the slider. A tension spring is also fixed between the lower ends of the first clamping rod and the second clamping rod so that the lower end of the first clamping rod and the lower end of the second clamping rod always have a tendency to approach each other, and thus the lower end of the first clamping rod and the lower end of the second clamping rod respectively slide and fit on the rear - side outer wall and the guiding inclined surface of the slider.

[0013] Preferably, a second pressing assembly is further provided above between the first pressing assembly and the clamping assembly. The second pressing assembly includes a second support frame fixed to the backrest frame, a second pressing cylinder rotatably connected to the second support frame, a second pressing rod rotatably connected to the second support frame and located below the second pressing cylinder, and a third pressing block and a fourth pressing block fixed to the lower end of the second pressing rod. The telescopic end of the second pressing cylinder is arranged forward and rotatably connected to the upper end of the second pressing rod.

[0014] Preferably, the second pressing assembly further includes a third support seat detachably fixed to the front side of the backrest frame, and a third cushion block detachably fixed to the third support seat and cooperating with the fourth pressing block.

[0015] Preferably, a positioning assembly is further provided above the clamping assembly. The positioning assembly includes a lifting cylinder fixed to the backrest frame, an L - shaped connecting block detachably fixed to the telescopic end of the lifting cylinder, a seat block detachably fixed to the L - shaped connecting block, and a positioning pin fixed to the seat block. The telescopic end of the lifting cylinder is inclined upward to the left and parallel to the positioning pin.

[0016] Preferably, a rotatable pulley is also connected to the lower end of the first clamping rod and the lower end of the second clamping rod. The pulley located at the lower end of the first clamping rod rolls and fits against the rear outer wall of the slider, and the pulley located at the lower end of the second clamping rod rolls and fits against the guiding inclined surface.

[0017] Preferably, a limiting groove is also formed on the guiding inclined surface, and the pulley located at the lower end of the second clamping rod rolls and is embedded in the limiting groove.

[0018] Preferably, the clamping assembly further includes a stop block fixed on the moving frame and above the lower end of the second clamping rod, a first limiting block fixed on the moving frame, and a second limiting block fixed on the front side of the back frame and cooperating with the first limiting block.

[0019] Preferably, a pressing component is further provided on the front side of the back frame and below the first pressing component. The pressing component includes a pressing cylinder fixed on the back frame and a pressing block fixed on the telescopic end of the pressing cylinder. The telescopic end of the pressing cylinder is inclined upward and to the right.

[0020] Preferably, a first support seat that is detachable and located between the pressing component and the clamping component is further fixed on the front side of the back frame, and a fourth cushion block that is detachable is further fixed on the first support seat; a second support seat that is detachable and located between the second pressing component and the positioning component and above the clamping component is further fixed on the front side of the back frame, and a second cushion block that is detachable is further fixed on the second support seat.

[0021] Compared with the prior art, the advantages of the present utility model are as follows: The present utility model has a high degree of automation, and thus does not need to rely on manual operation, thereby simplifying the operation steps and improving the work efficiency; in addition, the alignment accuracy of the two splicing plates is ensured and the occurrence of displacement is prevented, thereby improving the welding accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is the right front side structure diagram of the present utility model;

[0023] Figure 2 is the left front side structure diagram of the present utility model;

[0024] Figure 3 is the right rear side structure diagram of the present utility model. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0025] Unless otherwise defined, the technical terms or scientific terms used in this utility model shall have the ordinary meanings as understood by those with ordinary skills in the field to which this utility model belongs. The "first", "second" and similar terms used in this utility model do not denote any order, quantity or importance, but are only used to distinguish different components. Words such as "comprising" or "including" mean that the elements or objects appearing before this word cover the elements or objects listed after this word and their equivalents, without excluding other elements or objects. Words such as "connected" or "coupled" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Upper", "lower", "left", "right", etc. are only used to represent relative position relationships. When the absolute position of the object being described changes, the relative position relationship may also change accordingly.

[0026] To keep the following description of the embodiments of this utility model clear and concise, detailed descriptions of known functions and known components are omitted in this utility model.

[0027] As Figures 1 to 3 shown, a welding jig for a forklift double connecting plate includes a seat plate 1, a back frame 2 fixed on the top of the seat plate 1, a first pressing assembly 4 provided on the front side of the back frame 2, and a clamping assembly 7 provided on the front side of the back frame 2 and to the right of the first pressing assembly 4;

[0028] The first pressing assembly 4 includes a first support frame 41 fixed on the back frame 2, a first pressing cylinder 42 rotatably connected to the first support frame 41, a first pressing rod 43 rotatably connected to the first support frame 41 and to the right of the first pressing cylinder 42, and a pressing beam 45 fixed to the right end of the first pressing rod 43. The telescopic end of the first pressing cylinder 42 is arranged forward and rotatably connected to the left end of the first pressing rod 43;

[0029] The first pressing assembly 4 further includes a first support seat 48 and a second support seat 49 detachably fixed on the front side of the back frame 2 and distributed vertically, a first cushion block 44 and a second cushion block 410 detachably fixed on the first support seat 48 and the second support seat 49 respectively, and a first pressing block 46 and a second pressing block 47 detachably fixed on the pressing beam 45 and cooperating with the first cushion block 44 and the second cushion block 410 respectively;

[0030] The clamping assembly 7 includes a base 71 fixed on the front side of the back frame 2, a moving frame 72 movably connected to the front side of the back frame 2 to have the function of moving up and down obliquely, a moving cylinder 73 fixed on the base 71, and a clamping unit provided on the moving frame 72. The telescopic end of the moving cylinder 73 is arranged obliquely to the upper left and rotatably connected to the moving frame 72;

[0031] The clamping unit includes a slider 74 movably connected to the moving frame 72 to have the function of tilting up and down, and a clamping cylinder 75 fixed to the moving frame 72 and located at the lower right of the slider 74. The telescopic end of the clamping cylinder 75 is arranged obliquely upward to the left and fixed to the slider 74;

[0032] The clamping unit further includes a first clamping rod 76 and a second clamping rod 77. The middle parts of the first clamping rod 76 and the second clamping rod 77 are cross - arranged with each other and are rotatably and concentrically connected to the moving frame 72 and are both located above the left of the slider 74. The upper ends of the first clamping rod 76 and the second clamping rod 77 are respectively formed with a first clamping block 761 and a second clamping block 771 that cooperate with each other;

[0033] A guiding inclined surface 741 is formed at the upper front corner of the slider 74. A tension spring 78 is also fixed between the lower ends of the first clamping rod 76 and the second clamping rod 77 so that the lower ends of the first clamping rod 76 and the second clamping rod 77 always have a tendency to approach each other, and further the lower end of the first clamping rod 76 and the lower end of the second clamping rod 77 respectively slide and fit on the rear outer wall of the slider 74 and the guiding inclined surface 741.

[0034] Above the first pressing assembly 4 and the clamping assembly 7, there is also a second pressing assembly 8. The second pressing assembly 8 includes a second support bracket 81 fixed to the back frame 2, a second pressing cylinder 82 rotatably connected to the second support bracket 81, a second pressing rod 83 rotatably connected to the second support bracket 81 and located below the second pressing cylinder 82, and a third pressing block 84 and a fourth pressing block 85 fixed to the lower end of the second pressing rod 83. The telescopic end of the second pressing cylinder 82 is arranged forward and rotatably connected to the upper end of the second pressing rod 83.

[0035] The second pressing assembly 8 further includes a third support seat 86 detachably fixed to the front side of the back frame 2, and a third cushion block 87 detachably fixed to the third support seat 86 and cooperating with the fourth pressing block 85.

[0036] Above the clamping assembly 7, there is also a positioning component 9. The positioning component 9 includes a lifting cylinder 91 fixed to the back frame 2, an L - shaped connecting block 92 detachably fixed to the telescopic end of the lifting cylinder 91, a seat block 93 detachably fixed to the L - shaped connecting block 92, and a positioning pin 94 fixed to the seat block 93. The telescopic end of the lifting cylinder 91 is arranged obliquely upward to the left and is parallel to the positioning pin 94.

[0037] A rotatable pulley 79 is also connected to the lower end of each of the first clamping rod 76 and the second clamping rod 77. The pulley 79 located at the lower end of the first clamping rod 76 rolls and fits on the rear outer wall of the slider 74, and the pulley 79 located at the lower end of the second clamping rod 77 rolls and fits on the guiding inclined surface 741.

[0038] The guiding inclined surface 741 is also provided with a limiting groove 742, and the pulley 79 located at the lower end of the second clamping rod 77 is rollingly embedded in the limiting groove 742.

[0039] The clamping assembly 7 further includes a stopper 710 fixed on the moving frame 72 and above the lower end of the second clamping rod 77, a first limiting block 711 fixed on the moving frame 72, and a second limiting block 712 fixed on the front side of the back frame 2 and cooperating with the first limiting block 711.

[0040] On the front side of the back frame 2, there is also a jacking assembly 3 located below the first pressing assembly 4. The jacking assembly 3 includes a jacking cylinder 31 fixed on the back frame 2 and a jacking block 32 fixed on the telescopic end of the jacking cylinder 31. The telescopic end of the jacking cylinder 31 is inclined upward to the right.

[0041] On the front side of the back frame 2, a first support seat 5 which is detachable and located between the jacking assembly 3 and the clamping assembly 7 is also fixed. A fourth cushion block 6 which is detachable is also fixed on the first support seat 5; on the front side of the back frame 2, a second support seat 10 which is detachable and located between the second pressing assembly 8 and the positioning assembly 9 and above the clamping assembly 7 is also fixed. A second cushion block 11 which is detachable is also fixed on the second support seat 10.

[0042] Working principle:

[0043] The two splicing plates of the forklift double connecting plate are preliminarily fixed and placed between the first cushion block 44, the second cushion block 410, the third cushion block 87, the fourth cushion block 6 and the second support seat 10. Then, the telescopic end of the first pressing cylinder 42 in the first pressing assembly 4 is driven to extend outwards, so as to drive the pressing beam 45 to swing backward by means of the first pressing rod 43, and further make the first pressing block 46 and the second pressing block 47 both press on the front sides of the two splicing plates; then, the telescopic end of the lifting cylinder 91 in the positioning assembly 9 is driven to extend outwards, so as to drive the positioning pin 94 to incline and move upwards to the left by means of the L-shaped connecting block 92 and the seat block 93, and further make the positioning pin 94 insert into the structural hole located on one of the splicing plates.

[0044] Next, the telescopic end of the moving cylinder 73 in the driving and clamping assembly 7 extends outwards, driving the clamping unit to tilt and move towards the upper left through the moving frame 72. At the same time, the telescopic end of the clamping cylinder 75 in the clamping unit contracts inwards, driving the slider 74 to move towards the lower right. Then, by means of the guiding inclined surface 741 and the tension spring 78, the lower end of the second clamping rod 77 is gradually forced to approach the lower end of the first clamping rod 76, so that the first clamping block 761 and the second clamping block 771 are separated from each other until the first limiting block 711 abuts against the second limiting block 712. At this time, the first clamping block 761 and the second clamping block 771 are respectively located on both sides of the welding flanges of the two splicing plates; Subsequently, the telescopic end of the clamping cylinder 75 extends outwards to drive the first clamping block 761 and the second clamping block 771 to approach each other in the same way until the lower end of the second clamping rod 77 abuts against the stop block 710. At this time, the first clamping block 761 and the second clamping block 771 just clamp the welding flanges of the two splicing plates.

[0045] Then, the telescopic end of the second pressing cylinder 82 in the second pressing assembly 8 extends outwards, driving the third pressing block 84 and the fourth pressing block 85 to swing backwards through the second pressing rod 83 until both the third pressing block 84 and the fourth pressing block 85 are pressed against the front sides of the two splicing plates; At the same time, the telescopic end of the pressing cylinder 31 in the pressing assembly 3 extends outwards to drive the pressing block 32 to tilt and move towards the upper right until the pressing block 32 presses against the lower left side of one of the splicing plates. In this way, the fixation of the two splicing plates is completed and it is ensured that the welding flanges of the two splicing plates are closely attached to each other. Then, the welding tool can be used to weld the welding flanges, and then the two splicing plates are welded into a double-connected plate.

[0046] After welding is completed, the telescopic ends of the first pressing cylinder 42, the lifting cylinder 91, the second pressing cylinder 82, and the pressing cylinder 31 all contract inwards. Then, in the same way, the first pressing block 46, the second pressing block 47, the third pressing block 84, the fourth pressing block 85, and the pressing block 32 all move in the reverse direction to leave the double-connected plate; At the same time, the telescopic end of the clamping cylinder 75 contracts inwards to drive the first clamping block 761 and the second clamping block 771 to leave the welding flanges of the two splicing plates in the same way, and then the telescopic end of the moving cylinder 73 contracts inwards to drive the clamping unit to tilt and move towards the lower right in the same way; Finally, the double-connected plate can be taken off.

[0047] The utility model has a high degree of automation, so manual operation is not required, thus simplifying the operation steps and improving the work efficiency; In addition, the alignment accuracy of the two splicing plates is ensured and the occurrence of displacement is prevented, thereby improving the welding accuracy.

[0048] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A welding fixture for a forklift double connecting plate, characterized in that: It includes a seat plate, a back frame fixed on the top of the seat plate, a first clamping assembly arranged on the front side of the back frame, and a clamping assembly arranged on the front side of the back frame and located to the right of the first clamping assembly; The first pressing assembly includes a first support frame fixed on the back frame, a first pressing cylinder rotatably connected to the first support frame, a first pressing rod rotatably connected to the first support frame and located on the right side of the first pressing cylinder, and a pressing beam fixed to the right end of the first pressing rod, wherein the telescopic end of the first pressing cylinder is arranged forward and rotatably connected to the left end of the first pressing rod; The first clamping assembly further includes a first support seat and a second support seat detachably fixed to the front side of the back frame and respectively distributed up and down, a first cushion block and a second cushion block detachably fixed to the first support seat and the second support seat, and a first pressing block and a second pressing block detachably fixed to the pressing beam and respectively cooperating with the first cushion block and the second cushion block; The clamping assembly includes a base fixed to the front side of the back frame, a moving frame movably connected to the front side of the back frame to have an up and down tilting movement function, a moving cylinder fixed to the base, and a clamping unit arranged on the moving frame, wherein the telescopic end of the moving cylinder is tilted to the upper left and rotatably connected to the moving frame; The clamping unit includes a slider movably connected to the moving frame to have an up and down tilting movement function, and a clamping cylinder fixed to the moving frame and located at the lower right of the slider, wherein the telescopic end of the clamping cylinder is tilted toward the upper left and fixed to the slider; The clamping unit further comprises a first clamping rod and a second clamping rod, wherein the middle parts of the first clamping rod and the second clamping rod are cross-arranged and rotatably connected to the movable frame and are both located at the upper left of the slider, and the upper ends of the first clamping rod and the second clamping rod are respectively formed with a first clamping block and a second clamping block that cooperate with each other; A guiding slope is formed at the upper corner of the front side of the slider, and a tension spring is fixed between the lower ends of the first clamp rod and the second clamp rod so that the lower ends of the first clamp rod and the second clamp rod always tend to approach each other, thereby making the lower ends of the first clamp rod and the second clamp rod slide and fit on the rear outer wall of the slider and the guiding slope respectively.

2. A welding jig for a forklift double connecting plate according to claim 1, characterized in that: A second clamping assembly is also provided above the first clamping assembly and the clamping assembly, and the second clamping assembly includes a second support frame fixed on the back frame, a second clamping cylinder rotatably connected to the second support frame, a second pressure rod rotatably connected to the second support frame and located below the second pressure cylinder, and a third pressure block and a fourth pressure block fixed to the lower end of the second pressure rod, and the telescopic end of the second clamping cylinder is arranged forward and rotatably connected to the upper end of the second pressure rod.

3. A welding jig for a forklift double connecting plate according to claim 2, characterized in that: The second clamping assembly also includes a third support seat detachably fixed to the front side of the back frame, and a third cushion block detachably fixed to the third support seat and cooperating with the fourth clamping block.

4. A welding jig for a forklift double connecting plate according to claim 2, characterized in that: A locking assembly is also provided above the clamping assembly, and the locking assembly includes a lifting cylinder fixed on the back frame, a detachable L-shaped connecting block fixed on the telescopic end of the lifting cylinder, a detachable seat block fixed on the L-shaped connecting block, and a locking pin fixed on the seat block, and the telescopic end of the lifting cylinder is tilted toward the upper left and parallel to the locking pin.

5. The welding jig for forklift double connecting plates according to claim 1 is characterized in that: The lower end of the first clamp rod and the lower end of the second clamp rod are also connected to a rotatable pulley. The pulley located at the lower end of the first clamp rod rolls on the rear outer wall of the slider, and the pulley located at the lower end of the second clamp rod rolls on the guide inclined surface.

6. A welding jig for a forklift double connecting plate according to claim 5, characterized in that: The guide inclined surface is also provided with a limiting groove, and the pulley located at the lower end of the second clamping rod is rotatably embedded in the limiting groove.

7. The welding jig for double connecting plates of a forklift according to claim 1, characterized in that: The clamping assembly also includes a stopper fixed on the moving frame and located above the lower end of the second clamping rod, a first limit block fixed on the moving frame, and a second limit block fixed on the front side of the back frame and cooperating with the first limit block.

8. The welding jig for forklift double connecting plates according to claim 4, characterized in that: The front side of the back frame is also provided with a tightening assembly located below the first clamping assembly. The tightening assembly includes a tightening cylinder fixed on the back frame and a tightening block fixed on the telescopic end of the tightening cylinder. The telescopic end of the tightening cylinder is tilted toward the upper right.

9. A welding jig for double connecting plates of a forklift according to claim 8, characterized in that: The front side of the back frame is also fixed with a first support seat that is detachable and located between the pressing assembly and the clamping assembly, and a detachable fourth pad is also fixed on the first support seat; the front side of the back frame is also fixed with a second support seat that is detachable and located between the second pressing assembly and the positioning assembly and above the clamping assembly, and a detachable second pad is also fixed on the second support seat.

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