Large-tonnage forklift gantry straightening machine

Abstract

The utility model discloses a large-tonnage forklift gantry straightening machine, which relates to the technical field of gantry straightening machines, and comprises a rack, a hydraulic straightening device, an overturning workbench and a rotating arm balance mechanism, a forklift gantry is placed on the overturning workbench, the rack comprises a stand column and a cantilever which is rotatably arranged above the stand column through the rotating arm balance mechanism, and the hydraulic straightening device is arranged on the rotating arm balance mechanism. And the hydraulic correcting device is hoisted below the cantilever of the rack through a gravity balancer. The cantilever is controlled to rotate up and down through cooperation of a transmission mechanism in the rotating arm balance mechanism, so that the positions, close to and away from the operation table, of the hydraulic correction device are accurately adjusted, accidents are further reduced, and operation safety is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of door frame straightening machines, and in particular relates to a door frame straightening machine for a large-tonnage forklift. Background Art

[0002] The inner and outer masts of a forklift have two spaced channel steels, and the spacing between the two channel steels must be within the specified range after welding. For example, the forklift mast straightening machine and the mast production line using the straightening machine disclosed in the patent "CN202591297U" have a slider that slides back and forth along the radial direction of the column on the slewing cantilever, and a spring hanger is provided on the slider, and the cantilever has a slewing function. That is, the public document can only realize the rotation of the hydraulic straightening device in the transverse plane, but cannot realize the vertical upward and downward rotation adjustment thereof, and the spring hanger requires the operator to press down vigorously to place the hydraulic straightening device on the forklift mast, which makes the operation difficult. Moreover, when the forklift mast on the flipping workbench is too close to the hydraulic straightening device, the spring hanger will hinder the forklift mast when the forklift mast straightening machine is flipped. Since the upward and downward rotation adjustment of the cantilever cannot be realized, it is very easy for the hydraulic straightening device to hinder the forklift mast when the forklift mast is flipped due to the close distance between the hydraulic straightening device and the flipping action platform. Utility Model Content

[0003] In view of the existing defects and problems, the utility model provides a large-tonnage forklift door frame straightening machine.

[0004] The solution adopted by the utility model to solve its technical problems is: a large-tonnage forklift gantry straightening machine, comprising a frame, a hydraulic straightening device, a turning workbench and a swivel arm balancing mechanism, a forklift gantry is placed on the turning workbench, the frame comprises a column, and a cantilever rotatably installed above the column through a swivel arm balancing mechanism, characterized in that: the hydraulic straightening device is hoisted below the cantilever of the frame through a gravity balancer, the swivel arm balancing mechanism comprises a cross bar, a support frame and a sliding assembly, the end of the cross bar is connected to a T-shaped shaft, both ends of the T-shaped shaft are rotatably installed on the support frame, and a main gear is also matched and set on the T-shaped shaft, a slave gear is meshed at the bottom of the main gear, and the bottom of the slave gear is rotatably installed with the support frame, a first connecting rod is also rotatably installed on the slave gear, the far end of the first connecting rod is rotatably connected to a second connecting rod, and the end of the second connecting rod is connected to the sliding assembly; a spring is also installed on the sliding assembly, and the spring extends upward and is fixed to the support frame at the top of the main gear.

[0005] As a preferred technical solution of the utility model, a handle is vertically fixed to one end of the cantilever away from the column.

[0006] As a preferred technical solution of the utility model, one end of the cross bar is welded and fixed inside the cantilever, and the other end is fixedly connected to a T-shaped shaft.

[0007] As a preferred technical solution of the utility model, the sliding assembly includes a slide rail and a slider, the slide rail is fixedly installed with the support frame along the vertical direction, and the slider is slidably installed on the slide rail.

[0008] As a preferred technical solution of the utility model, the slider is also spaced apart with transverse mounting grooves, the end of the second connecting rod is fixedly connected to the mounting groove at the upper position of the slider, and the bottom of the spring is fixedly connected to the mounting groove at the lower position of the slider.

[0009] As a preferred technical solution of the utility model, the lateral adjustment mechanism includes a support shaft, a pull rope, a first transmission wheel, a second transmission wheel, a rope pulley and a sliding clamp. The support shaft is fixed to the far end of the cantilever along one lateral end, and the other is installed vertically to the column. The first transmission wheel is fixedly installed on the end of the support shaft away from the column, and the second transmission wheel is symmetrically installed on the front and rear sides of the column. A rope pulley is provided at the bottom of the column, and pull ropes are installed in the clamping grooves of the first transmission wheel, the second transmission wheel and the rope pulley, and the rope pulley is controlled to rotate by a motor; a sliding clamp is also slidably mounted on the support shaft.

[0010] As a preferred technical solution of the utility model, the sliding chuck includes a first sliding sleeve, which is slidably mounted on the support shaft, an L-shaped mounting plate is fixedly installed on the top of the first sliding sleeve, a second sliding sleeve is provided on the top of the mounting plate, the second sliding sleeve is matched with the pull rope and fixed, and a fixed seat is also vertically provided on the bottom of the first sliding sleeve.

[0011] Compared with the prior art, the beneficial effects of the utility model are:

[0012] The present invention provides a large-tonnage forklift mast straightening machine, which can realize fast and accurate adjustment of the position of the hydraulic straightening device through the control of the swing arm balancing mechanism, thereby improving the efficiency and accuracy of the operation, reducing the influence of unstable factors in the operation, and improving the safety of the operation; because the swing arm balancing mechanism can automatically balance the weight of the cantilever, the operator needs less force to control the position of the hydraulic straightening device, reducing the intensity and risk of manual operation, and further expanding the use and adjustment range of the hydraulic straightening device.

[0013] The present invention is also provided with a lateral adjustment mechanism, which drives the motor to control the rotation of the rope wheel through the controller, and can drive the pull rope to rotate in the slots of the first transmission wheel and the second transmission wheel, thereby realizing the adjustment of the lateral position of the hydraulic correction device, making the lateral movement of the hydraulic correction device more balanced and stable, improving the accuracy of the adjustment, reducing the error, realizing automatic adjustment of the lateral position of the hydraulic correction device, and reducing the burden on the operator. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a front view structural schematic diagram of the utility model;

[0015] Figure 2 It is a front view structural schematic diagram of the swing arm balancing mechanism;

[0016] Figure 3 It is a three-dimensional structural schematic diagram of the lateral adjustment mechanism;

[0017] Figure 4 It is a schematic diagram of the three-dimensional structure of the sliding chuck.

[0018] In the figure: 1-column, 2-cantilever, 3-rotating arm balancing mechanism, 4-gravity balancer, 5-hydraulic correction device, 6-turning workbench, 7-cross bar, 8-support frame, 9-spring, 10-main gear, 11-slave gear, 12-first connecting rod, 13-second connecting rod, 14-slide rail, 15-slider, 16-mounting groove, 17-handle, 18-T-axis, 19-support shaft, 20-pull rope, 21-first transmission wheel, 22-second transmission wheel, 24-ropes, 25-sliding chuck, 26-first sliding sleeve, 27-mounting plate, 28-second sliding sleeve, 29-fixed seat. DETAILED DESCRIPTION

[0019] The utility model is further described below in conjunction with the accompanying drawings and embodiments. Example

[0020] This embodiment provides a large-tonnage forklift mast straightening machine, including a frame, a hydraulic straightening device 5, a turning workbench 6 and a swing arm balancing mechanism 3, such as Figure 1 As shown, the frame includes a column 1 and a cantilever 2 rotatably installed above the column through a swivel arm balancing mechanism 3, and the column and the cantilever are perpendicular to each other in the initial state. The hydraulic correction device is hoisted under the cantilever of the frame through a gravity balancer, and below the hydraulic correction device is a turning workbench 6, on which a forklift mast is placed. The turning operation of the forklift mast is completed by the turning workbench 6, and after turning, the size correction of the forklift mast is achieved through the hydraulic correction device.

[0021] A handle 17 is fixed vertically at one end of the cantilever away from the column. By pushing and pulling the handle 17 up and down, the cantilever can be rotated upward or downward through the arm balance mechanism, thereby avoiding the problem that the hydraulic correction device hinders the forklift mast when the forklift mast is flipped due to the hydraulic correction device being too close to the flipping action platform. In addition, by configuring a gravity balancer 4 under the cantilever, the weight of the hydraulic correction device can be balanced by the weight of the gravity balancer, so as to achieve its suspended lifting and reduce the difficulty of manual operation.

[0022] like Figure 2 As shown, the swing arm balancing mechanism includes a support frame 8, a spring 9, a main gear 10, a slave gear 11 and a sliding assembly. The support frame 8 is installed at the intersection of the column and the cantilever. The support frame can be made of a transparent acrylic plate. The inner cavity of the cantilever is hollow and a cross bar 7 is provided along the horizontal direction. One end of the cross bar is welded and fixed to the inside of the cantilever, and the other end is fixedly connected with a T-shaped shaft 18. Both ends of the T-shaped shaft are rotatably installed on the support frame, and the T-shaped shaft is also matched with a main gear 10. A fan-shaped slave gear 11 is meshed at the bottom of the main gear, and the bottom of the slave gear is rotatably installed with the support frame.

[0023] Furthermore, the slave gear is also fixedly connected with a first connecting rod 12, the end of the first connecting rod is rotatably connected with a second connecting rod 13, and an angle is formed between the first connecting rod and the second connecting rod in a natural state. The end of the second connecting rod is rotatably connected with the sliding assembly. The first connecting rod and the second connecting rod can also be provided in two groups on both sides of the slave gear to further improve the stability of the transmission.

[0024] The sliding assembly includes a slide rail 14 and a slider 15. The slide rail is fixedly installed with the support frame in the vertical direction. The slider is slidably installed on the slide rail. The slider is also spaced apart with a horizontal mounting groove 16. The end of the second connecting rod is fixedly connected to the mounting groove located at the upper position of the slider. Figure 2 As shown, a spring 9 is vertically installed on the support frame, the top of the spring is fixedly connected to the support frame above the main gear, and the bottom is fixedly connected to the mounting groove located at the lower position on the slider.

[0025] The arm balancing mechanism is arranged in this way. When the cantilever is controlled to rotate up and down, the T-shaped shaft at the end of the cross bar 7 drives the main gear 10 to rotate, and then drives the slave gear to rotate through the engagement with the slave gear. When the slave gear rotates, the second connecting rod is driven to rotate through the fixedly connected first connecting rod, thereby changing the angle between the two. Furthermore, when the second connecting rod rotates, it can simultaneously drive the slider 15 to move up and down on the slide rail, and simultaneously realize the tension and compression of the spring.

[0026] The arrangement of the novel swing arm balancing mechanism can flexibly control the up and down rotation of the cantilever on the one hand, and realize the continuity and stability of motion transmission through the transmission of the T-axis, the main gear and the slave gear on the other hand, with high transmission efficiency, stable system motion and reliable working efficiency.

[0027] The present invention provides a large-tonnage forklift mast straightening machine. When in use, the hydraulic straightening device is hoisted on the cantilever through the gravity balancer, and the balance correction of the hydraulic straightening device is achieved at the same time. When the turning workbench needs to control the turning operation of the forklift mast, the handle can be pushed up or down, and the transmission mechanism in the swing arm balance mechanism can be used to control the up and down rotation of the cantilever, thereby achieving precise adjustment of the hydraulic straightening device close to and away from the operating table, further reducing the occurrence of accidents and improving the safety of operation. Example

[0028] On the basis of Example 1, in order to ensure that the hydraulic correction device can realize automatic or manual adjustment of the lateral position on the cantilever and further improve the adjustment range and automatic control of the hydraulic correction device, this embodiment provides a lateral adjustment mechanism at the bottom of the cantilever, and the gravity balancer is hoisted on the lateral adjustment mechanism, thereby realizing the lateral position adjustment of the hydraulic correction device.

[0029] like Figure 3 and Figure 4 As shown, the lateral adjustment mechanism includes a support shaft 19, a pull rope 20, a first transmission wheel 21, a second transmission wheel 22, a rope pulley 24 and a sliding clamp 25, wherein the support shaft 19 is fixed to the far end of the cantilever along one lateral end, and the other end is installed vertically to the column, the first transmission wheel 21 is fixedly installed on the end of the support shaft away from the column, the second transmission wheel 22 is symmetrically installed on the front and rear sides of the column, a rope pulley 24 is provided at the bottom of the column, and the pull rope 20 is installed in the clamping grooves of the first transmission wheel 21, the second transmission wheel 22 and the rope pulley 24, and the rope pulley is controlled to rotate by a motor.

[0030] A sliding chuck 25 is also slidably mounted on the support shaft, and the sliding chuck includes a first sleeve 26, which is used to be mounted on the support shaft. An L-shaped mounting plate 27 is fixedly mounted on the top of the first sleeve, and a second sleeve 28 is provided on the top of the mounting plate. The second sleeve is used to match and fix with the pull rope. A fixing seat 29 is also vertically provided at the bottom of the first sleeve for mounting a gravity balancer.

[0031] With such an arrangement, when the controller drives the motor to control the rotation of the rope pulley 24, it can simultaneously drive the pull rope to rotate in the slots of the first transmission wheel and the second transmission wheel, and the pull ropes located above the support shaft and parallel to each other move in opposite directions. The sliding clamp fixed to the pull rope on one side can move left and right on the support shaft along the extension direction of the support shaft, and at the same time drive the lateral movement of the hydraulic correction device through the gravity balancer, thereby realizing precise automatic adjustment of the lateral position of the hydraulic correction device.

[0032] The above description is only a preferred embodiment of the present invention and does not limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A large-tonnage forklift mast straightening machine, comprising a frame, a hydraulic straightening device, a turning workbench and a swing arm balancing mechanism, a forklift mast is placed on the turning workbench, the frame comprises a column, and a cantilever mounted above the column through a swing arm balancing mechanism, Features: The hydraulic correction device is hoisted under the frame cantilever through a gravity balancer, and the swing arm balancing mechanism includes a cross bar, a support frame and a sliding assembly, and a T-shaped shaft is connected to the end of the cross bar, and both ends of the T-shaped shaft are rotatably mounted on the support frame, and a main gear is also matched on the T-shaped shaft, and a slave gear is meshed at the bottom of the main gear, and the slave gear is rotatably mounted on the support frame at the bottom, and a first connecting rod is also rotatably mounted on the slave gear, and the far end of the first connecting rod is rotatably connected to the second connecting rod, and the end of the second connecting rod is connected to the sliding assembly; a spring is also installed on the sliding assembly, and the spring extends upward and is fixed to the support frame at the top of the main gear; a lateral adjustment mechanism is provided at the bottom of the cantilever, and the gravity balancer is hoisted on the lateral adjustment mechanism.

2. The large-tonnage forklift mast straightening machine according to claim 1, Features: A handle is vertically fixed on one end of the cantilever away from the column.

3. The large-tonnage forklift mast straightening machine according to claim 1, Features: One end of the cross bar is welded and fixed inside the cantilever, and the other end is fixedly connected with a T-shaped shaft.

4. The large-tonnage forklift mast straightening machine according to claim 1, Features: The sliding assembly comprises a sliding rail and a sliding block. The sliding rail is fixedly installed with the supporting frame along the vertical direction, and the sliding block is slidably installed on the sliding rail.

5. The large-tonnage forklift mast straightening machine according to claim 4, Features: The slider is also provided with transverse mounting grooves, the end of the second connecting rod is fixedly connected to the mounting groove located at the upper position of the slider, and the bottom of the spring is fixedly connected to the mounting groove located at the lower position of the slider.

6. The large-tonnage forklift mast straightening machine according to claim 1, Features: The lateral adjustment mechanism includes a support shaft, a pull rope, a first transmission wheel, a second transmission wheel, a rope pulley and a sliding clamp. The support shaft is fixed to the far end of the cantilever along one lateral end, and the other is installed vertically to the column. The first transmission wheel is fixedly installed on the end of the support shaft away from the column, and the second transmission wheel is symmetrically installed on the front and rear sides of the column. A rope pulley is provided at the bottom of the column, and pull ropes are installed in the clamping grooves of the first transmission wheel, the second transmission wheel and the rope pulley, and the rope pulley is controlled to rotate by a motor; a sliding clamp is also slidably mounted on the support shaft.

7. The large-tonnage forklift mast straightening machine according to claim 6, Features: The sliding chuck includes a first sliding sleeve, which is slidably mounted on the support shaft. An L-shaped mounting plate is fixedly mounted on the top of the first sliding sleeve. A second sliding sleeve is provided on the top of the mounting plate. The second sliding sleeve is matched with the pull rope and fixed. A fixing seat is also vertically provided on the bottom of the first sliding sleeve.

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