Loading wheel telescopic device and vehicle with adjustable gravity center

Abstract

The utility model discloses a loading wheel telescopic device and a vehicle with the adjustable gravity center. The loading wheel telescopic device comprises a telescopic sleeve, a telescopic rod, a loading wheel shaft and a driving mechanism. The telescopic sleeve is used for being fixedly connected to a vehicle body, one end of the telescopic rod is slidably connected into the telescopic sleeve, the other end of the telescopic rod extends out of the telescopic sleeve, and the end, extending out of the telescopic sleeve, of the telescopic rod is fixedly connected with the root of the loading wheel shaft. The driving mechanism is installed on the telescopic sleeve, the output end of the driving mechanism is connected with the telescopic rod, and the driving mechanism drives the telescopic rod to telescopically slide relative to the telescopic sleeve. The gravity center of the vehicle can be adjusted through compact, simple and reasonable design while the external structure of the vehicle is not damaged, the proportion of the cargo weight to the self weight and the overall dimension of the vehicle is not damaged, instability caused by back-and-forth movement of the portal frame is reduced, the working efficiency is improved, and the cost is reduced. And the vehicle is more stable and safer when carrying and lifting goods in normal operation.

Description

Technical Field

[0001] The utility model relates to the technical field of transport vehicle devices, in particular to a road wheel telescopic device and a vehicle with adjustable center of gravity. Background Art

[0002] A forklift is an industrial handling vehicle, widely used in ports, stations, airports, cargo yards, factory workshops, warehouses, circulation centers and distribution centers, etc., for loading and unloading, stacking and short-distance transportation of palletized goods, usually driven by a fuel engine or battery. The size and weight of an electric forklift are in a certain proportion to the weight of the goods it carries to ensure stability and safety during driving operations.

[0003] In the relevant technical scheme, the electric forklift adopts a multi-cylinder, multi-fulcrum, and multi-axle sleeve method to suspend and fix the gantry on the body or axle of the forklift. The gantry is pushed forward by the cylinder to cause the center of gravity of the forklift to move forward, which will consume the ratio of counterweight and cargo, and produce an operation mode of large counterweight and small cargo. During operation, because the gantry adopts a multi-cylinder, multi-fulcrum, and multi-axle sleeve fixing method, the gantry is prone to shaking and losing stability when the cargo is lifted, which will bring safety hazards. This design structure is different from the overall structure of the forklift that usually uses axle sleeves to directly fix the gantry and then installs auxiliary cylinders for adjustment. Its design is more complicated and the work efficiency is not high. In particular, when the weight of the cargo carried and lifted by the gantry reaches the critical point of the ratio with the forklift's own weight, it is easy to become unstable and there will be safety hazards. The driver's operation becomes more difficult and the operation speed needs to be slowed down, resulting in reduced work efficiency and other problems.

[0004] Therefore, there is a need for a vehicle device that can improve the stability and safety of the vehicle during transportation, lifting, and driving operations without damaging the external structure of the vehicle, thereby improving work efficiency. Utility Model Content

[0005] In order to solve at least one of the problems mentioned in the background technology, an embodiment of the present application provides a road wheel telescopic device and a vehicle with an adjustable center of gravity. The road wheel telescopic device is arranged between the vehicle body and the road wheel. The road wheel moves with the telescopic rod to achieve adjustable center of gravity of the vehicle, thereby improving the stability and safety of the vehicle during normal operation of carrying and lifting goods, and improving work efficiency through compact and simple reasonable design without damaging the external structure of the vehicle.

[0006] In a first aspect, an embodiment of the present application provides a road wheel telescopic device, which is used to connect between a vehicle body and a road wheel, and includes a telescopic sleeve, a telescopic rod, a road wheel shaft and a driving mechanism;

[0007] The telescopic sleeve is used to be fixedly connected to the vehicle body, one end of the telescopic rod is slidably connected in the telescopic sleeve, the other end of the telescopic rod extends out of the telescopic sleeve, the end of the telescopic rod extending out of the telescopic sleeve is fixedly connected to the root of the road wheel shaft, and the road wheel shaft is used to install the road wheel;

[0008] The driving mechanism is installed on the telescopic sleeve, the output end of the driving mechanism is connected to the telescopic rod, and the driving mechanism drives the telescopic rod to telescopically slide relative to the telescopic sleeve.

[0009] In a feasible implementation, a wear-resistant sleeve is provided between the telescopic rod and the telescopic sleeve, the wear-resistant sleeve is fixedly connected to the telescopic sleeve, and the inner surface of the wear-resistant sleeve is slidably connected to the telescopic rod.

[0010] In a feasible implementation, the wear-resistant sleeve includes two wear-resistant sub-sleeves, which are arranged opposite to each other along the axial direction, and each wear-resistant sub-sleeve is positioned and connected to the telescopic sleeve on the corresponding side by a stabilizing pin.

[0011] In a feasible implementation, a travel opening corresponding to the output end of the driving mechanism is provided on a side surface of the telescopic sleeve, and the output end is connected to the telescopic rod located at the travel opening.

[0012] In a feasible implementation, the driving mechanism comprises a hydraulic cylinder and a piston rod, the tail of the hydraulic cylinder is connected to the telescopic sleeve, and the head of the piston rod is connected to the telescopic rod located at the stroke opening.

[0013] In an achievable implementation, the telescopic sleeve is fixedly connected to a first support, and the first support is connected to the tail of the hydraulic cylinder via a pin;

[0014] The telescopic rod located at the stroke opening is fixedly connected to a second support, and the second support is connected to the head of the piston rod through a pin.

[0015] In an achievable implementation, the hydraulic oil cylinder is provided with an oil pipe interface, and the oil pipe interface is used to be connected to a hydraulic controller via a hydraulic oil pipe;

[0016] A hydraulic brake and a brake pot are installed in sequence on the road wheel shaft in a direction away from the telescopic rod. The hydraulic brake is fixedly connected to the root of the road wheel shaft near the brake pot. The hydraulic brake is used to be connected to a hydraulic controller via a hydraulic brake oil pipe. The brake pot is installed on the road wheel shaft through a bearing, and the brake pot is used to be connected to the road wheel.

[0017] In a feasible embodiment, the driving mechanism includes a motor, a driving gear and a rack. The motor is fixed on the telescopic sleeve, the output end of the motor is connected to the driving gear, the side of the telescopic rod is embedded with a rack extending along the telescopic direction of the telescopic rod, and the driving gear is meshed with the rack for transmission.

[0018] A second aspect of an embodiment of the present application provides a vehicle with an adjustable center of gravity, comprising a vehicle body and road wheels, wherein the above-mentioned road wheel retracting device is connected between the frame chassis of the vehicle body and the road wheels.

[0019] In an achievable embodiment, the vehicle includes a forklift, the forklift further includes a driving wheel and a gantry, the driving wheel is connected to the rear of the frame chassis, the number of the road wheels is two, the two road wheels are relatively arranged on the left and right sides of the front of the frame chassis, the gantry is located between the two road wheels and connected to the vehicle body;

[0020] The road wheel telescopic device is horizontally mounted on the frame chassis, and the road wheel telescopic device telescopes forward and backward relative to the vehicle body in the horizontal direction;

[0021] Alternatively, the road wheel telescopic device is vertically mounted on the frame chassis, and the road wheel telescopic device telescopes up and down relative to the vehicle body in a vertical direction.

[0022] In summary, the road wheel telescopic device provided by the present application has a telescopic sleeve for being fixedly connected to the vehicle body, the telescopic rod slides relative to the telescopic sleeve, one end of the telescopic rod extending out of the telescopic sleeve is fixedly connected to a road wheel axle for installing the road wheel, and a driving mechanism is provided on the telescopic sleeve. Under the driving action of the output end of the driving mechanism, the road wheel can be telescopically moved relative to the vehicle body along with the telescopic rod, thereby realizing an adjustable center of gravity of the vehicle. While not destroying the external structure of the vehicle, the work efficiency is improved through a compact and simple reasonable design. The ratio of the cargo weight to the vehicle's own weight and the external dimensions is not destroyed, and the instability caused by the back and forth movement of the gantry is reduced, making the vehicle more stable and safer when carrying and lifting cargo during normal operations, and improving the convenience of the operating experience. The vehicle with an adjustable center of gravity of the present application includes the above-mentioned road wheel telescopic device, which has the same beneficial effects. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0024] Figure 1A schematic structural diagram of a vehicle with adjustable center of gravity provided in an embodiment of the present application;

[0025] Figure 2 A top view of a vehicle with an adjustable center of gravity provided in an embodiment of the present application;

[0026] Figure 3 A bottom view of a vehicle with adjustable center of gravity provided by an embodiment of the present application;

[0027] Figure 4 An exploded view of the road wheel telescopic device provided in an embodiment of the present application;

[0028] Figure 5 A schematic diagram of the installation of the road wheel telescopic device provided in an embodiment of the present application;

[0029] Figure 6 A schematic diagram of the structure of the wear-resistant sleeve provided in an embodiment of the present application.

[0030] Description of reference numerals:

[0031] 100-Road wheel telescopic device;

[0032] 110- telescopic sleeve; 111- travel opening; 112- stabilizing nail hole;

[0033] 120-driving mechanism; 121-hydraulic cylinder; 121a-oil pipe interface; 122-piston rod; 123-first support; 124-second support; 125-hydraulic oil pipe;

[0034] 130-wear-resistant sleeve; 131-wear-resistant sub-sleeve; 132-stabilizing nail;

[0035] 140-telescopic rod; 150-road wheel axle; 160-hydraulic brake; 170-brake pot; 180-hydraulic brake oil pipe;

[0036] 200-body; 201-frame chassis;

[0037] 300-road wheels; 400-driving wheels; 500-gantry. DETAILED DESCRIPTION

[0038] In order to make the purpose, technical solution and advantages of the present application clearer, the technical solution in the embodiment of the present application will be described in more detail below in conjunction with the drawings in the embodiment of the present application. It is worth noting that the embodiments described in the drawings are only part of the embodiments of the present application, not all of the embodiments. That is, the embodiments described by the drawings are exemplary and are intended to be used to explain the present application, and cannot be understood as limiting the present application.

[0039] The following will be combined Figure 1 to Figure 6The road wheel extension device 100 and the vehicle with adjustable center of gravity provided in the embodiments of the present application are described.

[0040] The present application embodiment provides a road wheel telescopic device 100, such as Figures 3-4 As shown, it is used to connect between the vehicle body 200 and the road wheel 300, and includes a telescopic sleeve 110, a telescopic rod 140, a road wheel shaft 150 and a driving mechanism 120.

[0041] The telescopic sleeve 110 is used to be fixedly connected to the vehicle body 200, one end of the telescopic rod 140 is slidably connected in the telescopic sleeve 110, and the other end of the telescopic rod 140 extends out of the telescopic sleeve 110. The end of the telescopic rod 140 extending out of the telescopic sleeve 110 is fixedly connected to the root of the road wheel shaft 150, and the road wheel shaft 150 is used to install the road wheel 300.

[0042] The driving mechanism 120 is installed on the telescopic sleeve 110 , and the output end of the driving mechanism 120 is connected to the telescopic rod 140 . The driving mechanism 120 drives the telescopic rod 140 to telescope and slide relative to the telescopic sleeve 110 .

[0043] The telescopic sleeve 110 may be fixedly connected to the crossbeam of the vehicle body 200 , and a plurality of connecting plates may be connected between the telescopic sleeve 110 and the crossbeam to strengthen the positioning.

[0044] The driving mechanism 120 may adopt, but is not limited to, the following hydraulic and motor driving methods.

[0045] The road wheel telescopic device 100 of the embodiment of the present application has a telescopic sleeve 110 for being fixedly connected to the vehicle body 200, a telescopic rod 140 slides relative to the telescopic sleeve 110, and one end of the telescopic rod 140 extending out of the telescopic sleeve 110 is fixedly connected to a road wheel shaft 150 for mounting a road wheel 300, and a driving mechanism 120 is provided on the telescopic sleeve 110. During transport and lifting operations, the telescopic rod 140 can be extended or retracted relative to the telescopic sleeve 110 by the driving mechanism 120 as needed, and the road wheel 300 can be telescopically moved relative to the vehicle body 200, thereby achieving an adjustable center of gravity of the vehicle.

[0046] The embodiments of the present application improve work efficiency through a compact, simple and reasonable design without changing the external structure of the vehicle. It neither destroys the ratio of cargo weight to vehicle weight and external dimensions, nor reduces the instability caused by the back-and-forth movement of the gantry, making the vehicle more stable and safer during normal operations of transporting and lifting cargo, and improving the convenience of the driver's operating experience.

[0047] In one possible implementation, Figures 4-5 As shown, a wear-resistant sleeve 130 is provided between the telescopic rod 140 and the telescopic sleeve. The wear-resistant sleeve 130 is fixedly connected to the telescopic sleeve 110 , and the inner surface of the wear-resistant sleeve 130 is slidably connected to the telescopic rod 140 .

[0048] The wear-resistant sleeve 130 and the telescopic sleeve 110 are structurally matched and tightly connected. The provision of the wear-resistant sleeve 130 can improve the connection stability between the telescopic sleeve 110 and the telescopic rod 140, while also making the telescopic operation smooth and the friction loss small.

[0049] In one possible implementation, Figure 6 As shown, the wear-resistant sleeve 130 includes two wear-resistant sub-sleeves 131 , which are arranged opposite to each other along the axial direction. Each wear-resistant sub-sleeve 131 is positioned and connected to the telescopic sleeve 110 on the corresponding side through a stabilizing pin 132 .

[0050] Among them, the telescopic sleeve 110 is preset with a stabilizing nail hole 112, and each wear-resistant sub-sleeve 131 is positioned and connected with the telescopic sleeve 110 on the corresponding side through two stabilizing nails 132 respectively. This arrangement makes installation convenient and positioning accurate, and further improves operability.

[0051] In one possible implementation, Figure 5 As shown, a travel opening 111 corresponding to the output end of the driving mechanism 120 is formed on the side surface of the telescopic sleeve 110 , and the output end is connected to the telescopic rod 140 located at the travel opening 111 .

[0052] The travel opening 111 can limit the extension distance of the telescopic rod 140. The connection position between the telescopic rod 140 and the driving mechanism 120 is located in the telescopic sleeve 110, which can disperse the overall load of the telescopic rod 140, making the device compact and safe.

[0053] In one possible implementation, Figures 4-5 As shown, the driving mechanism 120 includes a hydraulic cylinder 121 and a piston rod 122 . The tail of the hydraulic cylinder 121 is connected to the telescopic sleeve 110 , and the head of the piston rod 122 is connected to the telescopic rod 140 located at the stroke opening 111 .

[0054] Among them, when the vehicle is performing transport and lifting operations, pressure is provided to the hydraulic cylinder 121 as needed to push the piston rod 122 to achieve reciprocating motion, thereby driving the telescopic rod 140 to extend or retract relative to the telescopic sleeve 110 to achieve the movement of the road wheel 300. The safety and stability of the lifting operation are improved by adjusting the center of gravity. The hydraulic drive method has the advantages of smooth transmission, simple structure and easy installation and maintenance.

[0055] In one possible implementation, Figure 5 As shown, the telescopic sleeve 110 is fixedly connected to the first support 123, and the first support 123 is connected to the tail of the hydraulic cylinder 121 through a pin shaft.

[0056] The telescopic rod 140 located at the stroke opening 111 is fixedly connected to the second support 124 , and the second support 124 is connected to the head of the piston rod 122 via a pin.

[0057] The first support 123 has two connecting plates arranged opposite to each other, and opposite pin holes are provided on the two connecting plates. The tail of the hydraulic cylinder 121 is inserted into the opening between the connecting plates and connected to the two connecting plates through a pin shaft.

[0058] The head of the piston rod 122 is a fork-shaped connecting end. The second support 124 includes a slider slidably connected to the stroke opening 111. The slider is connected to a connecting block matching the fork-shaped connecting end. The connecting block and the fork-shaped connecting end are connected by a pin shaft.

[0059] This arrangement can keep the torsion angle of the telescopic rod 140 unchanged, improve sliding stability and operational safety, and facilitate installation and maintenance.

[0060] In one possible implementation, Figure 3 and Figure 5 As shown, the hydraulic cylinder 121 is provided with an oil pipe interface 121 a , and the oil pipe interface 121 a is used to be connected to a hydraulic controller via a hydraulic oil pipe 125 .

[0061] A hydraulic brake 160 and a brake pot 170 are installed in sequence on the road wheel shaft 150 in the direction away from the telescopic rod 140. The hydraulic brake 160 is fixedly connected to the root of the road wheel shaft 150 near the brake pot 170. The hydraulic brake 160 is used to be connected to the hydraulic controller via the hydraulic brake oil pipe 180. The brake pot 170 is installed on the road wheel shaft 150 through a bearing, and the brake pot 170 is used to be connected to the road wheel 300.

[0062] By adding brake mechanisms such as a hydraulic brake 160 and a brake pot 170 to the road wheel axle 150, the overall stability of the vehicle during the lifting operation can be improved, making the operation safe and reliable.

[0063] In a feasible embodiment, the driving mechanism 120 includes a motor, a driving gear and a rack. The motor is fixed on the telescopic sleeve 110, and the output end of the motor is connected to the driving gear. The side of the telescopic rod 140 is embedded with a rack extending along the telescopic direction of the telescopic rod 140, and the driving gear is meshed with the rack for transmission.

[0064] Among them, the motor can be connected to the driving gear through a reducer, which has strong load-bearing capacity, high precision, and a large transmission range, thereby improving the applicability of the device.

[0065] The present application embodiment provides a vehicle with an adjustable center of gravity, such as Figure 1As shown, it includes a vehicle body 200 and a road wheel 300 , and the above-mentioned road wheel retracting device 100 is connected between the frame chassis 201 of the vehicle body 200 and the road wheel 300 .

[0066] In the vehicle with an adjustable center of gravity in the embodiment of the present application, the road wheels 300 can be telescopically moved relative to the vehicle body 200, and the center of gravity of the vehicle is adjustable, so that the vehicle is more stable and safer when carrying and lifting goods in normal operations, and the convenience of the driver's operating experience is improved.

[0067] In one possible implementation, Figures 1 to 3 As shown, the vehicle includes a forklift, which also includes a driving wheel 400 and a gantry 500. The driving wheel 400 is connected to the rear of the frame chassis 201. There are two road wheels 300, which are relatively arranged on the left and right sides of the front of the frame chassis 201. The gantry 500 is located between the two road wheels 300 and is connected to the vehicle body 200.

[0068] The road wheel extension device 100 is horizontally mounted on the frame chassis 201, and the road wheel extension device 100 can be extended and retracted forward and backward relative to the vehicle body 200 in the horizontal direction.

[0069] The telescopic sleeve 110 is connected between the front and middle beams of the chassis 201. Furthermore, in order to reduce the span of the forklift, the front beam is shorter than the rear beam, and the rear end of the telescopic sleeve 110 is connected to the middle beam, and the front end is connected to the front beam.

[0070] In a feasible implementation, the road wheel retracting device 100 is vertically mounted on the frame chassis 201, and the road wheel retracting device 100 is retracted up and down relative to the vehicle body 200 in the vertical direction.

[0071] This application is applicable to various types of vehicles, such as Figure 1 The general forklift shown in the figure uses axle sleeves to directly fix the mast and then installs auxiliary cylinders for adjustment. It can also be suitable for forklifts in which the mast and the body are fixed by multiple cylinders, multiple fulcrums, and multiple axle sleeves. The road wheels are driven by the telescopic device to move horizontally or vertically relative to the body. The compact and simple reasonable design improves work efficiency without changing the external structure of the vehicle. It does not destroy the ratio of the cargo weight to the vehicle's own weight and the overall dimensions, but reduces the instability caused by the back and forth movement of the mast, making the vehicle more stable and safer when carrying and lifting cargo during normal operations, and improving the convenience of the driver's operating experience.

[0072] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A road wheel retractable device, used to connect between a vehicle body and a road wheel, characterized in that: It includes a telescopic sleeve, a telescopic rod, a road wheel shaft and a driving mechanism; The telescopic sleeve is used to be fixedly connected to the vehicle body, one end of the telescopic rod is slidably connected in the telescopic sleeve, the other end of the telescopic rod extends out of the telescopic sleeve, the end of the telescopic rod extending out of the telescopic sleeve is fixedly connected to the root of the road wheel shaft, and the road wheel shaft is used to install the road wheel; The driving mechanism is installed on the telescopic sleeve, the output end of the driving mechanism is connected to the telescopic rod, and the driving mechanism drives the telescopic rod to telescopically slide relative to the telescopic sleeve.

2. The road wheel telescopic device according to claim 1, characterized in that: A wear-resistant sleeve is provided between the telescopic rod and the telescopic sleeve, the wear-resistant sleeve is fixedly connected to the telescopic sleeve, and the inner surface of the wear-resistant sleeve is slidably connected to the telescopic rod.

3. The road wheel telescopic device according to claim 2, characterized in that: The wear-resistant sleeve comprises two wear-resistant sub-sleeves, which are arranged opposite to each other along the axial direction, and each wear-resistant sub-sleeve is positioned and connected to the telescopic sleeve on the corresponding side by means of stabilizing pins.

4. The road wheel telescopic device according to claim 1, characterized in that: A travel opening corresponding to the output end of the driving mechanism is provided on the side surface of the telescopic sleeve, and the output end is connected to the telescopic rod located at the travel opening.

5. The road wheel telescopic device according to claim 4, characterized in that: The driving mechanism comprises a hydraulic cylinder and a piston rod. The tail of the hydraulic cylinder is connected to the telescopic sleeve, and the head of the piston rod is connected to the telescopic rod located at the stroke opening.

6. The road wheel telescopic device according to claim 5, characterized in that: The telescopic sleeve is fixedly connected to a first support, and the first support is connected to the tail of the hydraulic cylinder through a pin shaft; The telescopic rod located at the stroke opening is fixedly connected to a second support, and the second support is connected to the head of the piston rod through a pin.

7. The road wheel telescopic device according to claim 5, characterized in that: The hydraulic cylinder is provided with an oil pipe interface, and the oil pipe interface is used to be connected to a hydraulic controller via a hydraulic oil pipe; A hydraulic brake and a brake pot are installed in sequence on the road wheel shaft in a direction away from the telescopic rod. The hydraulic brake is fixedly connected to the root of the road wheel shaft near the brake pot. The hydraulic brake is used to be connected to a hydraulic controller via a hydraulic brake oil pipe. The brake pot is installed on the road wheel shaft through a bearing, and the brake pot is used to be connected to the road wheel.

8. The road wheel telescopic device according to claim 4, characterized in that: The driving mechanism includes a motor, a driving gear and a rack. The motor is fixed on the telescopic sleeve. The output end of the motor is connected to the driving gear. The side of the telescopic rod is embedded with a rack extending along the telescopic direction of the telescopic rod. The driving gear is meshed with the rack for transmission.

9. A vehicle with an adjustable center of gravity, characterized in that: The vehicle comprises a vehicle body and road wheels, wherein a road wheel retracting device as claimed in any one of claims 1 to 8 is connected between the frame chassis of the vehicle body and the road wheels.

10. The vehicle with adjustable center of gravity according to claim 9, characterized in that: The vehicle includes a forklift, and the forklift also includes a driving wheel and a mast, the driving wheel is connected to the rear of the frame chassis, the number of the road wheels is two, the two road wheels are relatively arranged on the left and right sides of the front of the frame chassis, and the mast is located between the two road wheels and connected to the vehicle body; The road wheel telescopic device is horizontally mounted on the frame chassis, and the road wheel telescopic device telescopes forward and backward relative to the vehicle body in the horizontal direction; Alternatively, the road wheel telescopic device is vertically mounted on the frame chassis, and the road wheel telescopic device telescopes up and down relative to the vehicle body in a vertical direction.

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