Transport vehicle and lifting device of objective table of transport vehicle

Abstract

The utility model relates to a lifting device for an objective table of a transport vehicle, which adopts a telescopic frame to drive the objective table to do lifting motion and drives a connecting shaft to move back and forth through a driving mechanism. The connecting shaft can drive the two connecting arms, connected with the lower sliding grooves, in the telescopic frames on the left side and the right side of the frame device to synchronously move along the lower sliding grooves, so that the telescopic frames move up and down, the objective table is driven to ascend and descend, and the structure is simple, convenient to maintain and low in cost.

Description

Technical Field

[0001] The utility model relates to a transport vehicle and a lifting device for a loading platform thereof, in particular to a transport vehicle and a lifting device for a loading platform thereof used in mountainous road conditions. Background Art

[0002] Outdoor labor often requires the use of transport vehicles, which generally have a loading platform and use a lifting device to lift the loading platform to facilitate loading and unloading of goods. However, existing transport vehicles are mostly used indoors, and most of them use hydraulic mechanisms to lift the loading platform. Hydraulic lifting mechanisms are relatively expensive, and the maintenance cost of hydraulic circuits is high, which is not suitable for some cost-sensitive usage scenarios. In addition, hydraulic lifting mechanisms are not suitable for outdoor places such as the wild where there are a lot of sand and dust foreign objects. The hydraulic rods and hydraulic cylinders are easily invaded by sand and dust foreign objects, and are prone to oil leakage and other faults. Utility Model Content

[0003] In view of the above-mentioned shortcomings of the prior art, the purpose of the utility model is to provide a lifting device for a transport vehicle loading platform, which has a simple structure and low cost.

[0004] To achieve the above-mentioned purpose, the utility model provides a lifting device for a loading platform of a transport vehicle, which adopts the following technical scheme: a lifting device for a loading platform of a transport vehicle, comprising a frame device, a telescopic frame is respectively provided on the left and right sides of the frame device, the upper end of the telescopic frame is connected to the loading platform, and the lower end of the telescopic frame is connected to the frame device;

[0005] The loading platform is provided with an upper slide groove extending forward and backward, and the frame device is provided with a lower slide groove parallel to the upper slide groove;

[0006] The telescopic frame includes one or more cross-connection frames arranged in series, the cross-connection frame includes two connecting arms of equal length, and the two connecting arms of the cross-connection frame are hingedly connected at the center position;

[0007] The end of a connecting arm at the upper end of the telescopic frame is connected to the upper slide groove, and the end of another connecting arm at the upper end of the telescopic frame is hinged on the loading platform; the end of a connecting arm at the lower end of the telescopic frame is connected to the lower slide groove, and the end of another connecting arm at the lower end of the telescopic frame is hinged on the frame device; the lower ends of the two connecting arms connected to the lower slide groove in the telescopic frames on the left and right sides of the frame device are connected together through a connecting shaft extending left and right;

[0008] The connecting shaft is driven by the driving mechanism to move forward and backward, thereby driving the telescopic frame to move up and down.

[0009] Preferably, a driving motor is provided on the frame device, and a transmission screw extending in the front-to-back direction is connected to the shaft head of the driving motor, a nut sleeve is sleeved on the front part of the transmission screw, the transmission screw is transmission-connected with the nut sleeve, and the nut sleeve is connected to the connecting shaft through a connecting frame, and the driving motor drives the transmission screw to rotate, thereby causing the nut sleeve to move in the front-to-back direction together with the connecting shaft.

[0010] More preferably, the nut sleeve is located at the front of the transmission screw, the drive motor is arranged at the rear of the frame device, and the drive motor is connected to the rear end of the transmission screw.

[0011] More preferably, the transmission screw extends in a direction parallel to the lower slide slot, and both ends of the transmission screw are supported on the frame device through bearing seats.

[0012] More preferably, the connecting frame is U-shaped, including a connecting part and two connecting ears relatively arranged on both sides of the connecting part, the two connecting ears are provided with connecting holes, the connecting shaft passes through the two connecting holes, the connecting part is provided with a through hole, the nut sleeve passes through the through hole, the nut sleeve is provided with a connecting flange, and the connecting flange is fixed together with the connecting part by bolts.

[0013] Preferably, a load-bearing frame is provided on the frame device, and when the telescopic frame moves downward to the lowest position, the loading platform falls on the load-bearing frame.

[0014] Preferably, lower ends of the two connecting arms connected to the lower slide groove are provided with lower roller bearings, the connecting shaft is connected in the lower roller bearings, and the lower roller bearings are in rolling cooperation with the lower slide groove.

[0015] Preferably, upper ends of the two connecting arms connected to the upper slide groove are provided with upper roller bearings, and the upper roller bearings are in rolling cooperation with the upper slide groove.

[0016] More preferably, a connecting rod extending leftward and rightward is connected between the upper roller bearings.

[0017] Corresponding to the lifting device of a transport vehicle loading platform of the utility model, the utility model also provides a transport vehicle, including the lifting device of the transport vehicle loading platform described in the above technical solution or any preferred technical solution thereof.

[0018] As described above, the utility model relates to a lifting device for a transport vehicle loading platform, which has the following beneficial effects: in a lifting device for a transport vehicle loading platform of the utility model, a telescopic frame is used to drive the loading platform to perform lifting movements, and the connecting shaft is driven forward and backward by a driving mechanism, and the connecting shaft drives the two connecting arms connected to the lower slide groove in the telescopic frame on the left and right sides of the frame device to move synchronously along the lower slide groove, thereby making the telescopic frame move up and down, thereby driving the loading platform to rise and fall. This structure is relatively simple, does not require an oil circuit system, does not require a sealing structure and an oil pump, is easy to maintain, and has low cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 The diagram shows a three-dimensional structure of the transport vehicle, with only part of the structure of the stage being shown.

[0020] Figure 2 Shown is a front view of the transporter structure.

[0021] Figure 3 A schematic diagram of the three-dimensional structure of the transport vehicle is shown from another angle, with the loading platform removed.

[0022] Figure 4 A detailed view showing the connection between the unattached frame and the drive screw and connecting shaft.

[0023] Figure 5 Shown is a schematic diagram of the transport vehicle platform lifting device.

[0024] Component number description

[0025] 1 Frame device

[0026] 2 Telescopic rack

[0027] 3 Stage

[0028] 4 Upper chute

[0029] 5 lower chute

[0030] 6 Cross-connect rack

[0031] 7 Connecting arm

[0032] 8 Connecting shaft

[0033] 9 Nut sleeve

[0034] 10 Connecting rod

[0035] 11 Transmission rod

[0036] 12 Load-bearing frame

[0037] 13 Lower roller bearing

[0038] 14 Upper roller bearing

[0039] 15 Connecting rack

[0040] 16Connection

[0041] 17 Connecting ears

[0042] 18 connection holes

[0043] 19 Connecting flange

[0044] 20 bearing seat DETAILED DESCRIPTION

[0045] The following is a description of the implementation of the present invention by means of specific embodiments. People familiar with the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification.

[0046] It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the utility model, so they have no substantial technical significance. Any modification of the structure, change of the proportion relationship or adjustment of the size, without affecting the effects and purposes that can be achieved by the utility model, should still fall within the scope of the technical content disclosed by the utility model. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and "one" quoted in this specification are only for the convenience of description, and are not used to limit the scope of the implementation of the utility model. The change or adjustment of their relative relationship should also be regarded as the scope of the implementation of the utility model without substantial change of the technical content.

[0047] like Figures 1 to 4 As shown, the utility model provides a lifting device for a loading platform of a transport vehicle, comprising a frame device 1, a telescopic frame 2 is respectively provided on the left and right sides of the frame device 1, the upper end of the telescopic frame 2 is connected to the loading platform 3, and the lower end of the telescopic frame 2 is connected to the frame device 1;

[0048] The loading platform 3 is provided with an upper slide groove 4 extending forward and backward, and the frame device 1 is provided with a lower slide groove 5 parallel to the upper slide groove 4;

[0049] The telescopic frame 2 includes one or more groups of cross-connection frames 6 arranged in series, and the cross-connection frame 6 includes two connecting arms 7 of equal length, and the two connecting arms 7 of the cross-connection frame 6 are hingedly connected at the center position;

[0050] The end of a connecting arm 7 at the upper end of the telescopic frame 2 is connected to the upper slide groove 4, and the end of another connecting arm 7 at the upper end of the telescopic frame 2 is hinged on the loading platform 3; the end of a connecting arm 7 at the lower end of the telescopic frame 2 is connected to the lower slide groove 5, and the end of another connecting arm 7 at the lower end of the telescopic frame 2 is hinged on the frame device 1; the lower ends of the two connecting arms 7 connected to the lower slide groove 5 in the telescopic frames 2 on the left and right sides of the frame device 1 are connected together through a connecting shaft 8 extending left and right;

[0051] The connecting shaft 8 is driven by the driving mechanism to move forward and backward, thereby driving the telescopic frame 2 to move up and down.

[0052] In a lifting device for a transport vehicle loading platform of the utility model, a telescopic frame 2 is used to drive the loading platform 3 to perform lifting movement. The connecting shaft 8 is driven to move forward and backward by a driving mechanism. The connecting shaft 8 will drive the two connecting arms 7 connected to the lower slide groove 5 in the telescopic frame 2 on the left and right sides of the frame device 1 to move synchronously along the lower slide groove 5, so that the telescopic frame 2 moves up and down, thereby driving the loading platform 3 to move up and down. This structure is relatively simple, does not require an oil circuit system, does not require a sealing structure and an oil pump, is easy to maintain, and has a low cost.

[0053] In the lifting device of the loading platform of a transport vehicle of the present invention, the driving mechanism drives the connecting shaft 8 to move forward and backward, thereby driving the telescopic frame 2 to move telescopically, and then driving the loading platform 3 to move up and down. Figure 5 The lower end of a connecting arm 7 at the lower end of the telescopic frame 2 is slidably connected to the lower slide groove 5, and the lower end of the other connecting arm 7 at the lower end of the telescopic frame 2 is hinged to the frame device 1; when the connecting arm 7 connected to the lower slide groove 5 at the lower end of the telescopic frame 2 slides along the lower slide groove 5 and retracts toward the other connecting arm 7 at the lower end of the telescopic frame 2, the telescopic frame 2 is extended to make the loading platform 3 rise; when the connecting arm 7 connected to the lower slide groove 5 at the lower end of the telescopic frame 2 slides along the lower slide groove 5 and forks with the other connecting arm 7 at the lower end of the telescopic frame 2, the telescopic frame 2 is shortened to make the loading platform 3 rise; the two connecting arms 7 connected to the loading platform 3 at the upper end of the telescopic frame 2 and the two connecting arms 7 connected to the frame device 1 at the lower end of the telescopic frame 2 move synchronously accordingly, and it is only necessary to drive the connecting shaft 8 to move left and right to drive the connecting arm 7 slidably connected to the lower slide groove 5 at the lower end of the telescopic frame 2 to move along the lower slide groove 5, so that the telescopic frame 2 can drive the loading platform 3 to rise and fall. There are many ways to drive the connecting arm 7 that is slidably connected to the lower end of the telescopic frame 2 and the lower slide 5 to move. As a preferred embodiment, Figure 2 and Figure 3As shown, the frame device 1 is provided with a driving motor (not shown in the figure), and a driving screw 11 extending in the front-to-back direction is connected to the shaft head of the driving motor. A nut sleeve 9 is sleeved on the front of the driving screw 11. The driving screw 11 is drivingly connected to the nut sleeve 9. The nut sleeve 9 is connected to the connecting shaft through a connecting frame 15. The driving motor drives the driving screw 11 to rotate, so that the nut sleeve 9 moves in the front-to-back direction together with the connecting shaft. The transmission mode of the driving screw 11 and the nut sleeve 9 is actually the same as the working principle of the ball screw mechanism, and the standard ball screw in the prior art can be directly used to replace the driving screw and the nut sleeve.

[0054] like Figure 3 As shown, the nut sleeve 9 is located in front of the transmission screw 11, and the drive motor is arranged at the rear of the frame device, and the drive motor is connected to the rear end of the transmission screw 11. The drive motor is arranged at the rear end of the frame device 1, and a counterweight can be arranged at the front of the frame device 1 to adjust the center of gravity of the frame device.

[0055] like Figure 3 As shown, the transmission screw extends in a direction parallel to the lower slide slot, and both ends of the transmission screw 11 are supported on the frame device through bearing seats 20. The transmission screw 11 extends forward and backward and remains parallel to the lower slide slot 5.

[0056] Please refer to Figure 4 The connecting frame 15 is U-shaped, including a connecting portion 16 and two connecting ears 17 arranged opposite to each other on both sides of the connecting portion 16. The two connecting ears 17 are provided with connecting holes 18. The connecting shaft 8 passes through the two connecting holes 18. The connecting portion 16 is provided with a through hole (not shown in the figure). The nut sleeve 9 passes through the through hole. The nut sleeve 9 is provided with a connecting flange 19. The connecting flange 19 is fixed to the connecting portion 16 by bolts. In order to firmly connect the connecting frame 15 to the connecting shaft 8, the connecting shaft 8 and the connecting frame 15 can be welded together at the connecting hole 18.

[0057] When the loading platform 3 needs to be raised to facilitate loading of goods, the telescopic frame 2 drives the loading platform 3 to move, and the weight of the loading platform 3 is borne by the telescopic frame 2; the loading platform 3 mostly needs to be reset to a fixed position to bear the weight of the goods, and the telescopic frame 2 is not suitable for bearing a large load for a long time, especially under the condition of movement and bumps, which will damage the related moving parts and connecting parts of the telescopic frame 2. Therefore, a load-bearing frame 12 is also provided on the frame device 1. When the telescopic frame 2 moves downward to the lowest position, the loading platform 3 falls on the load-bearing frame 12, and the load-bearing frame 12 bears the weight of the goods. The load-bearing frame 12 is firmly fixedly connected to the frame device 1, and does not need to move relative to each other, and can bear a large load.

[0058] In order to enable the connecting arm 7 connected to the lower end of the telescopic frame 2 and the lower slide 5 to move smoothly, reduce friction resistance and reduce wear, as a preferred embodiment, Figure 2 As shown, the lower ends of the two connecting arms 7 connected to the lower chute 5 are provided with lower roller bearings 13, the connecting shaft 8 is connected to the lower roller bearings 13, the lower roller bearings 13 and the lower chute 5 are rollingly matched, and similarly, the upper ends of the two connecting arms 7 connected to the upper chute 4 are provided with upper roller bearings 14, the upper roller bearings 14 and the upper chute 4 are rollingly matched. This can reduce friction and make the movement smoother.

[0059] In a lifting device for a transport vehicle loading platform of the utility model, the loading platform 3 is lifted and lowered by the telescopic frames 2 arranged on the left and right sides of the frame device 1. In order to enhance the stability of the telescopic frames 2, as shown in FIG. Figure 2 As shown, connecting rods 10 extending left and right are connected between the upper roller bearings 14. The connecting rods 10 are added to the connection between the two telescopic frames 2 to strengthen the overall structural strength and stability of the two telescopic frames 2, and prevent the telescopic frames 2 from becoming unstable.

[0060] Based on the technical solutions of the above embodiments, the lifting device of a transport vehicle loading platform of the utility model can conveniently drive the loading platform to move up and down, has a relatively simple structure, is easy to maintain, and has a low cost.

[0061] In summary, the utility model effectively overcomes various shortcomings of the prior art and has high industrial utilization value.

[0062] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the technology may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by a person of ordinary skill in the art without departing from the spirit and technical concept disclosed in the present invention shall still be covered by the claims of the present invention.

Claims

1. A lifting device for a transport vehicle loading platform, characterized in that: It includes a frame device, and a telescopic frame is respectively provided on the left and right sides of the frame device, the upper end of the telescopic frame is connected to the loading platform, and the lower end of the telescopic frame is connected to the frame device; The loading platform is provided with an upper slide groove extending forward and backward, and the frame device is provided with a lower slide groove parallel to the upper slide groove; The telescopic frame includes one or more cross-connection frames arranged in series, the cross-connection frame includes two connecting arms of equal length, and the two connecting arms of the cross-connection frame are hingedly connected at the center position; The end of a connecting arm at the upper end of the telescopic frame is connected to the upper slide groove, and the end of another connecting arm at the upper end of the telescopic frame is hinged on the loading platform; the end of a connecting arm at the lower end of the telescopic frame is connected to the lower slide groove, and the end of another connecting arm at the lower end of the telescopic frame is hinged on the frame device; the lower ends of the two connecting arms connected to the lower slide groove in the telescopic frames on the left and right sides of the frame device are connected together through a connecting shaft extending left and right; The connecting shaft is driven by the driving mechanism to move forward and backward, thereby driving the telescopic frame to move up and down.

2. The lifting device for the transport vehicle loading platform according to claim 1 is characterized in that: The frame device is provided with a driving motor, and a driving screw extending in the front-to-back direction is connected to the shaft head of the driving motor. A nut sleeve is sleeved on the front part of the driving screw. The driving screw is drivingly connected to the nut sleeve, and the nut sleeve is connected to the connecting shaft through a connecting frame. The driving motor drives the driving screw to rotate, so that the nut sleeve moves together with the connecting shaft in the front-to-back direction.

3. The lifting device for the transport vehicle loading platform according to claim 2 is characterized in that: The nut sleeve is located at the front part of the transmission screw, the drive motor is arranged at the rear part of the frame device, and the drive motor is connected to the rear end of the transmission screw.

4. The lifting device for the transport vehicle loading platform according to claim 2, characterized in that: The transmission screw rod extends in a direction parallel to the lower sliding groove, and both ends of the transmission screw rod are supported on the frame device through bearing seats.

5. The lifting device for the transport vehicle loading platform according to claim 2, characterized in that: The connecting frame is U-shaped, including a connecting portion and two connecting ears arranged oppositely on both sides of the connecting portion, the two connecting ears are provided with connecting holes, the connecting shaft passes through the two connecting holes, the connecting portion is provided with a through hole, the nut sleeve passes through the through hole, the nut sleeve is provided with a connecting flange, and the connecting flange is fixed together with the connecting portion by bolts.

6. The lifting device for the transport vehicle loading platform according to claim 1, characterized in that: The frame device is provided with a load-bearing frame, and when the telescopic frame moves downward to the lowest position, the loading platform falls on the load-bearing frame.

7. The lifting device for the transport vehicle loading platform according to claim 1, characterized in that: The lower ends of the two connecting arms connected to the lower slide groove are provided with lower roller bearings, the connecting shaft is connected in the lower roller bearings, and the lower roller bearings are in rolling cooperation with the lower slide groove.

8. The lifting device for the transport vehicle loading platform according to claim 1, characterized in that: Upper ends of the two connecting arms connected to the upper slide groove are provided with upper roller bearings, and the upper roller bearings are in rolling cooperation with the upper slide groove.

9. The lifting device for the transport vehicle loading platform according to claim 8, characterized in that: A connecting rod extending leftward and rightward is connected between the upper roller bearings.

10. A transport vehicle, comprising the lifting device for the transport vehicle loading platform according to any one of claims 1 to 9.

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