A portable helicopter tire changer

Abstract

The present invention discloses a portable helicopter tire changer, which relates to the technical field of aviation equipment; the equipment includes an upper limit mechanism, a hollow hydraulic lifting mechanism, a central spindle, a hydraulic pump and a downward pressure mechanism; it is mainly used in scenarios where a helicopter stays in an unsecured outdoor location and needs to temporarily change a tire. The equipment has a small structure size, light weight, and can be disassembled and packed, making it convenient to carry with a vehicle or carry randomly; the rod system mechanism used in the equipment can be universally applicable to tires of different diameters, and a balance rod mechanism is designed to ensure that the downward pressure seat maintains its posture. The tire changer of the present invention can be used to conveniently, quickly and effectively realize helicopter tire changes.

Description

Technical Field

[0001] The invention relates to the technical field of aviation mechanical equipment, and in particular to a portable helicopter tire changer. Background Art

[0002] Since helicopter tires are installed differently from ordinary car tires, common car tire changers cannot be used for helicopter tire change operations. Currently used helicopter tire change equipment is mostly workbench-type equipment, which is large in size and heavy in weight, and is not suitable for random carrying and use with vehicles. As helicopter flight missions become more and more intensive and parking points become more and more distributed, the demand for helicopter tire change becomes more and more frequent, and workbench-type tire changers are not suitable for fast tire change in the field. Currently, the commonly used method of tire change in the field is the method of manpower plus crowbar, which is laborious and time-consuming to operate, and inefficient. There is no similar portable helicopter tire changer. Summary of the invention

[0003] The object of the present invention is to provide a portable helicopter tire changer, so as to solve the above-mentioned problems existing in the prior art.

[0004] In order to achieve the above object, the technical solution adopted by the present invention is as follows:

[0005] A portable helicopter tire changer comprises an upper limit mechanism, a hollow hydraulic lifting mechanism, a central spindle, a hydraulic pump and a pressing mechanism;

[0006] The central spindle passes through the helicopter tire body, the pressing mechanism and the hollow hydraulic lifting mechanism are sequentially mounted on the central spindle, and the pressing mechanism is in contact with the helicopter tire body, and the upper limit structure is installed on the upper part of the hollow hydraulic mechanism and is connected to the top of the central spindle by threads;

[0007] The hydraulic pump is connected to the hollow hydraulic lifting mechanism through a hydraulic hose.

[0008] Preferably, the hollow hydraulic lifting mechanism comprises a hollow piston and a body, the hollow piston and the body can move up and down relative to each other, the body is in contact with the upper end surface of the downward pressing mechanism, and the hollow piston is in contact with the upward pressing mechanism;

[0009] The hollow piston is controlled to rise relative to the body by the hydraulic pump.

[0010] Preferably, the pressing mechanism comprises a pressing center shaft, a lower limit nut, a bearing cylinder and a plurality of rod system structures, the lower limit nut, the bearing cylinder and the slider are sleeved on the pressing center shaft, the lower limit nut is installed at the bottom of the slider, the bearing cylinder is installed at the top of the pressing center shaft, and the rod system structure is installed between the bearing cylinder and the slider;

[0011] The rod system structure includes a pressure rod, a tension rod, a balance rod, a three-axis connection block and a slider, wherein the balance rod and the pressure rod are arranged in parallel, and one end of the balance rod and the pressure rod are connected to the side surface of the bearing cylinder, and the other end is connected to the three-axis connection block;

[0012] The tension rod is connected between the three-axis connection block and the sliding block.

[0013] Preferably, the rod system structure of the pressing mechanism further includes a pressing seat, which is installed at the bottom of the three-axis connecting block and contacts with the helicopter tire.

[0014] Preferably, the number of the bar structures is not less than 3, as long as they are evenly distributed.

[0015] Preferably, the upper limit structure comprises two detachable handles and an upper limit nut, and the detachable handles are threadedly mounted on both sides of the upper limit nut.

[0016] Preferably, the central spindle comprises an upper central shaft, a lower central shaft and a base, the upper central shaft and the lower central shaft are detachably connected and the lower central shaft is detachably mounted on the base.

[0017] The beneficial effects of the present invention are:

[0018] The present invention provides a portable helicopter tire changing device that can be used for tires of various specifications. The device is mainly used in scenarios where a helicopter stays in an unsecured outdoor location and needs to temporarily change the tire. The device has a small structure size, light weight, and can be disassembled and packed, making it convenient to carry with a vehicle or carry randomly. The device uses a hollow hydraulic lifting mechanism to generate downward force to separate the tire from the wheel hub. The method of using downward pressure on the tire to change the tire has been verified on existing helicopter tire changing devices. The device proposes a method of using a hollow hydraulic lifting mechanism, which can effectively reduce the size and weight of the downward pressure device and achieve portability. The rod system mechanism used in the device can achieve universal applicability to tires of different diameters, and a balance rod mechanism is designed to ensure that the downward pressure seat maintains its posture. The tire changer of the present invention can conveniently, quickly, and effectively realize helicopter tire changing operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1The installation structure of the portable helicopter tire tread device in embodiment 1;

[0020] Figure 2 Schematic diagram of the hollow hydraulic lifting mechanism of the portable helicopter tire lying device in Example 1;

[0021] Figure 3 1 is a schematic diagram of the downward pressing structure of the portable helicopter tire flattening device in Example 1;

[0022] Figure 4 1 is a schematic diagram of the upper limit structure of the portable helicopter tire lying device in Example 1;

[0023] Figure 5 1 is a schematic diagram of the central spindle structure of the portable helicopter tire lying device in Example 1;

[0024] Figure 6 It is the helicopter wheel structure;

[0025] 1 is the tire, 2 is the wheel hub, 3 is the fixing bolt, 4 is the upper limit structure, 5 is the hollow hydraulic lifting mechanism, 6 is the downward pressure structure, 7 is the central spindle, 8 is the helicopter wheel, 9 is the hydraulic hose, 10 is the manual hydraulic pump, 11 is the hollow piston, 12 is the body, 13 is the load-bearing cylinder, 14 is the balance bar, 15 is the pressure bar, 16 is the tension bar, 17 is the three-axis connecting block, 18 is the downward pressure block, 19 is the slider, 20 is the lower limit nut, 21 is the handle, and 22 is the upper line nut. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation methods described herein are only used to explain the present invention and are not used to limit the present invention.

[0027] Example 1

[0028] This embodiment provides a portable helicopter tire changer. Figure 1 As shown, it includes an upper limit mechanism, a hollow hydraulic lifting mechanism, a central spindle, a hydraulic pump and a pressing mechanism;

[0029] The central spindle passes through the helicopter tire body, the pressing mechanism and the hollow hydraulic lifting mechanism are sequentially mounted on the central spindle, and the pressing mechanism is in contact with the helicopter tire body, and the upper limit structure is installed on the upper part of the hollow hydraulic mechanism and is connected to the top of the central spindle by threads;

[0030] The hydraulic pump is connected to the hollow hydraulic lifting mechanism through a hydraulic hose.

[0031] The hollow hydraulic lifting mechanism in this embodiment includes a hollow piston and a body. Figure 2 As shown, the hollow piston and the body can move up and down relative to each other, the body is in contact with the upper end surface of the downward pressing mechanism, and the hollow piston is in contact with the upward pressing mechanism;

[0032] The hollow piston is controlled to rise relative to the body by the hydraulic pump.

[0033] The pressing mechanism in this embodiment includes a pressing center shaft (not shown in the figure), a lower limit nut, a bearing cylinder and a plurality of rod system structures, such as Figure 3 As shown, the lower limit nut, the bearing cylinder and the slider are sleeved on the downward pressing central axis, the lower limit nut is installed at the bottom of the slider, the bearing cylinder is installed at the top of the downward pressing central axis, and the rod system structure is installed between the bearing cylinder and the slider;

[0034] The rod system structure includes a pressure rod, a tension rod, a balance rod, a three-axis connection block and a slider, wherein the balance rod and the pressure rod are arranged in parallel, and one end of the balance rod and the pressure rod are connected to the side surface of the bearing cylinder, and the other end is connected to the three-axis connection block;

[0035] The tension rod is connected between the three-axis connection block and the sliding block.

[0036] The rod system structure of the pressing mechanism in this embodiment further includes a pressing seat, which is installed at the bottom of the three-axis connecting block and contacts the helicopter tire. The number of the rod system structures in this embodiment is 3.

[0037] The upper limit structure in this embodiment includes two detachable handles and an upper limit nut. The detachable handles are installed on both sides of the upper limit nut through threads.

[0038] In this embodiment, the central main shaft comprises an upper central shaft, a lower central shaft and a base. The upper central shaft and the lower central shaft are detachably connected and the lower central shaft is detachably mounted on the base.

[0039] The specific implementation method in use is:

[0040] First, put the helicopter wheel over the center spindle and install it. Then adjust the down-pressing mechanism to match the wheel size, put the down-pressing mechanism over the center spindle and install it in place. The three down-pressing seats of the down-pressing mechanism are in contact with the tire. Put the hollow hydraulic lifting mechanism over the center spindle and install it above the down-pressing mechanism. Figure 3As shown, the hollow hydraulic lifting mechanism consists of a hollow piston and a body. The hollow piston can move up and down relative to the body, and the body is in contact with the upper end surface of the downward pressing mechanism. The upper limit mechanism is fixed to the central spindle through a threaded structure. The upper limit mechanism is in contact with the hollow piston of the hollow hydraulic lifting mechanism and pre-tightens the downward pressing mechanism. After the hollow hydraulic lifting mechanism is connected to the manual hydraulic pump through a hydraulic hose, the manual hydraulic pump controls the hollow piston of the hollow hydraulic lifting mechanism to rise relative to the body. The hollow piston is limited by the upper limit mechanism, so that the body of the hollow hydraulic lifting mechanism generates downward pressure. The downward pressure is transmitted to the wheel tire through the downward pressing mechanism, thereby separating the wheel tire from the hub.

[0041] By adopting the above technical solution disclosed in the present invention, the following beneficial effects are obtained:

[0042] The present invention provides a portable helicopter tire changing device that can be used for tires of various specifications. The device is mainly used in scenarios where a helicopter stays in an unsecured outdoor location and needs to temporarily change the tire. The device has a small structure size, light weight, and can be disassembled and packed, making it convenient to carry with a vehicle or carry randomly. The device uses a hollow hydraulic lifting mechanism to generate downward force to separate the tire from the wheel hub. The method of using downward pressure on the tire to change the tire has been verified on existing helicopter tire changing devices. The device proposes a method of using a hollow hydraulic lifting mechanism, which can effectively reduce the size and weight of the downward pressure device and achieve portability. The rod system mechanism used in the device can achieve universal applicability to tires of different diameters, and a balance rod mechanism is designed to ensure that the downward pressure seat maintains its posture. The tire changer of the present invention can conveniently, quickly, and effectively realize helicopter tire changing operations.

[0043] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be considered as the scope of protection of the present invention.

Claims

1. A portable helicopter tire changer, characterized in that: It includes an upper limit mechanism, a hollow hydraulic lifting mechanism, a central spindle, a hydraulic pump and a pressing mechanism; The central spindle passes through the helicopter tire body, the pressing mechanism and the hollow hydraulic lifting mechanism are sequentially mounted on the central spindle, and the pressing mechanism is in contact with the helicopter tire body, and the upper limit mechanism is installed on the upper part of the hollow hydraulic lifting mechanism and is connected to the top of the central spindle through threads; The hydraulic pump is connected to the hollow hydraulic lifting mechanism through a hydraulic hose; The hollow hydraulic lifting mechanism comprises a hollow piston and a body, wherein the hollow piston and the body can move up and down relative to each other, the body contacts the upper end surface of the pressing mechanism, and the hollow piston contacts the upper limit mechanism; Controlling the hollow piston to rise relative to the body by the hydraulic pump; The pressing mechanism comprises a pressing center shaft, a lower limit nut, a bearing cylinder and a plurality of rod systems, wherein the rod systems comprise a pressure rod, a tension rod, a balance rod, a three-axis connection block and a slider, wherein the balance rod and the pressure rod are arranged in parallel, and one end of the balance rod and the pressure rod are connected to the side surface of the bearing cylinder, and the other end is connected to the three-axis connection block; The lower limit nut, the bearing cylinder and the slider are sleeved on the downward pressing central shaft, the lower limit nut is installed at the bottom of the slider, the bearing cylinder is installed at the top of the downward pressing central shaft, and the rod system structure is installed between the bearing cylinder and the slider; The tension rod is connected between the three-axis connection block and the slider; The rod system structure of the pressing mechanism further includes a pressing seat, which is installed at the bottom of the three-axis connecting block and contacts with the helicopter tire; The number of the bar structures is no less than 3; The upper limit mechanism comprises two detachable handles and an upper limit nut, and the detachable handles are installed on both sides of the upper limit nut through threads; The central main shaft comprises an upper central shaft, a lower central shaft and a base. The upper central shaft and the lower central shaft are detachably connected and the lower central shaft is detachably mounted on the base.

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