Adjustable garden irrigation equipment

Abstract

The invention relates to the technical field of garden irrigation, and provides adjustable garden irrigation equipment which comprises an irrigation device, the irrigation device comprises a base, a long rod penetrates through one side of the base and is rotatably connected with the base, one end of the long rod is fixedly connected with a roller, and the top of the base is fixedly connected with a water tank. And one side of the water tank is fixedly connected with a handle. By means of the technical scheme, the problems in the prior art are solved, the force for driving the rotating rod to rotate by the motor is matched with components such as the gear A, the fixing rod and the two-way rack, the rotating rod is driven by the motor to rotate, the gear A is driven by the rotating rod to rotate, and then the two-way rack is driven by the gear A to move in the horizontal direction; the bidirectional rack drives the gear B to rotate, and then the gear B drives the sliding sleeve to rotate, so that the effect of automatically adjusting the irrigation angle is achieved, irrigation is more uniform, and growth of vegetation is facilitated.

Description

Technical Field

[0001] The invention relates to the technical field of garden irrigation, and in particular to a regulating garden irrigation device. Background Art

[0002] Garden refers to a specially cultivated natural environment and recreational area, that is, an environment created in a certain area by using engineering technology and artistic means, through transforming the terrain, planting trees and flowers, building buildings and arranging garden paths, etc., which can provide people with daily walks and aerobic exercises. Since a large number of trees are planted in the garden, in the rainy season, the garden usually uses garden irrigation equipment to water the plants in the garden. Since there is a lot of soil in the garden, the soil often blocks the nozzle. When workers repair the irrigation equipment, they usually need to replace the entire irrigation pipe where the blocked nozzle is located, which increases the labor intensity of the workers.

[0003] According to a publicly disclosed garden irrigation device that is easy to maintain (publication number: CN217308578U), it includes an irrigation pipe and a circular shell, a circular installation groove is provided on the irrigation pipe, the circular shell is installed in the circular installation groove, a circular groove is provided on the circular shell, a rotating plate is rotatably installed in the circular groove, and multiple nozzles are prepared in the patent. When the nozzle is blocked or damaged, it is only necessary to rotate the hand wheel to rotate it. When all the nozzles have been used, the hand wheel can be turned to make them automatically fall off, which is convenient for replacement and effectively reduces the labor intensity of workers. However, in the above device, it is difficult to achieve the effect of automatically adjusting the irrigation angle through the cooperation of components such as the irrigation pipe and the circular shell, resulting in uneven irrigation and affecting the growth of vegetation, which needs to be improved. Summary of the invention

[0004] The present invention proposes an adjustable garden irrigation device, which solves the problem in the related art that a motor drives a rotating rod to rotate, thereby causing the rotating rod to drive gear A to rotate, and then gear A drives a bidirectional rack to move horizontally, thereby causing the bidirectional rack to drive gear B to rotate, and then gear B drives a sliding sleeve to rotate.

[0005] The technical solution of the present invention is as follows: an adjustable garden irrigation device, comprising an irrigation device, the irrigation device comprising a base, a long rod passing through one side of the base and rotatably connected to the long rod, a roller fixedly connected to one end of the long rod, a water tank fixedly connected to the top of the base, a handle fixedly connected to one side of the water tank, a body provided on one side of the base, a connecting pipe fixedly passing through one side of the water tank, and a spray pipe provided on the top of the body; A steering adjustment device is provided on the outside of the irrigation device, and the steering adjustment device includes a motor, which is fixedly connected to a side of the water tank close to the connecting pipe, and the output shaft of the motor is fixedly connected to a rotating rod, and the end of the rotating rod away from the motor is fixedly connected to a gear A, and the side of the motor away from the water tank is fixedly connected to a fixing rod, and a bidirectional rack is provided on the top of the fixing rod, and one side of the bidirectional rack is meshed with the gear A, and a gear B is provided on the side of the bidirectional rack away from the gear A, and the gear B is meshed with the bidirectional rack, and a sliding sleeve is fixedly connected to the bottom of the gear B, and a through hole is opened on the circumferential surface of the sliding sleeve.

[0006] Furthermore, the end of the connecting pipe away from the water tank passes through the circumferential surface of the nozzle, and the number of the long rods is two, the first long rod is arranged on one side of the base, and the second long rod is arranged on one side of the vehicle body. The above design is conducive to ensuring the stability of the device through the two long rods.

[0007] Furthermore, the fixing rod is T-shaped, the inner wall of the sliding sleeve is rotatably connected to the end of the nozzle away from the vehicle body, and the bidirectional rack is located between gear A and gear B. The above design is conducive to limiting the bidirectional rack by the T-shaped fixing rod.

[0008] Furthermore, a lubrication device is provided on the outside of the irrigation device, and the lubrication device includes a positioning plate, one side of the positioning plate is fixedly connected to one end of a fixed rod, an airbag is fixedly connected to the side of the positioning plate close to the fixed rod, a spring A is fixedly connected to the inner wall of the airbag, a dropper is fixedly penetrated on the circumferential surface of the airbag, a fixing plate is fixedly connected to the side of the vehicle body close to the nozzle, an oil tank is fixedly connected to the side of the fixing plate away from the vehicle body, an oil pipe is fixedly penetrated on the circumferential surface of the airbag, and an end of the oil pipe away from the airbag is fixedly penetrated in the oil tank. The above design is conducive to lubricating the components in the device and is convenient for increasing the service life.

[0009] Furthermore, there are two positioning plates, which are symmetrical with each other along the vertical center axis of the fixed rod, two airbags, which are symmetrical with each other along the vertical center axis of the fixed rod, and two droppers, which are symmetrical about the center point of the bidirectional rack. The above design is conducive to squeezing the airbag through the displacement of the bidirectional rack, so that the airbag is forced to shrink.

[0010] Furthermore, the gear A is located at the opening of the first dropper, the gear B is located at the opening of the second dropper, the airbag is located on the displacement track of the bidirectional rack, the number of the fixing plates is two, and they are symmetrical to each other along the vertical center axis of the vehicle body. The above design is conducive to lubricating different components in the device through two droppers.

[0011] Furthermore, a pressure device is provided on the outside of the irrigation device, and the pressure device includes a pipe, one end of the pipe is fixedly passed through a side of the water tank close to the motor, a sealing rubber ring A is fixedly connected to the inner wall of the pipe, a push rod is slidably connected to the inner wall of the pipe, a sealing rubber ring B is sleeved on the end of the push rod close to the inner wall of the pipe, a spring B is fixedly connected to the end of the push rod close to the sealing rubber ring B, and the end of the spring B away from the push rod is fixedly connected to the inner wall of the pipe, a half gear is passed through the end of the rotating rod away from the motor and is fixedly connected to the half gear, a one-way rack is provided on one side of the half gear, the one-way rack is meshed with the half gear, and a triangular plate is fixedly connected to one side of the one-way rack. The above design is conducive to pressurizing the water tank through the pressure device, so that the liquid in the water tank can be transported to the spray pipe through the connecting pipe.

[0012] Furthermore, one end of the push rod away from the spring B is located on the displacement trajectory of the inclined surface of the triangular plate, one end of the pipe away from the push rod is located inside the water tank, and the sealing rubber ring A is located on the displacement trajectory of the sealing rubber ring B. The above design is conducive to ensuring the sealing of the pipe through the sealing rubber ring A and the sealing rubber ring B.

[0013] Furthermore, the pipeline is located between the motor and the vehicle body, the half gear is located between gear A and the motor, the pipeline is in a Z shape, and the pipeline is located above the vehicle body. The above design is conducive to better pressurizing the water tank through the Z-shaped pipeline.

[0014] Furthermore, there are two oil tanks, which are symmetrical along the vertical center axis of the vehicle body, and there are two springs A, which are symmetrical along the vertical center axis of the fixing rod. The above design is conducive to transporting oil to the airbag through the two oil tanks.

[0015] The working principle and beneficial effects of the present invention are: 1. In the present invention, the force of the rotating rod driven by the motor cooperates with components such as gear A, the fixed rod and the bidirectional rack, so that the motor drives the rotating rod to rotate, so that the rotating rod drives gear A to rotate, and then gear A drives the bidirectional rack to move horizontally, so that the bidirectional rack drives gear B to rotate, and then gear B drives the sliding sleeve to rotate, thereby achieving the effect of automatically adjusting the irrigation angle, making the irrigation more uniform, and contributing to the growth of vegetation.

[0016] 2. The present invention realizes that the force of the displacement of the bidirectional rack cooperates with the positioning plate, the airbag, the spring A and other components, so that when the bidirectional rack is displaced in the horizontal direction, the bidirectional rack squeezes the airbag, so that the airbag is forced to shrink. When the bidirectional rack moves away from the airbag, the airbag expands through the tension of the internal spring A, and at the same time, the airbag absorbs the oil in the oil pipe into the inside of the airbag through the oil pipe. When the bidirectional rack squeezes the airbag again, the airbag drips the oil onto the parts through the dropper, thereby achieving the effect of lubricating the parts in the device and increasing the service life of the device.

[0017] 3. The present invention realizes the rotation of the rotating rod by cooperating with components such as the pipeline, the sealing rubber ring A and the push rod, so that the rotating rod drives the half gear to rotate, and then the half gear drives the one-way rack to move in the vertical direction, so that the one-way rack drives the triangular plate to move in the vertical direction, and then the triangular plate squeezes the push rod, so that the push rod pushes the air in the pipeline into the water tank, thereby achieving the effect of pressurizing the water tank, so that the water tank can better transport the liquid to the nozzle through the connecting pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0019] Figure 1 It is a schematic diagram of the three-dimensional appearance structure of the present invention; Figure 2 It is a schematic diagram of the three-dimensional structure of the base of the present invention when viewed from above; Figure 3 It is a schematic diagram of the three-dimensional structure of the vehicle body of the present invention from a side view; Figure 4 It is a schematic diagram of a three-dimensional structure of the airbag of the present invention in cross section; Figure 5 It is a schematic diagram of a three-dimensional structure of a pipeline section of the present invention; Figure 6 It is a schematic diagram of the three-dimensional structure of the water tank of the present invention; Figure 7 For the present invention Figure 3 A three-dimensional enlarged image of center A; Figure 8 For the present invention Figure 4 A three-dimensional enlarged view of B.

[0020] In the figure: 1. irrigation device; 101. base; 102. long rod; 103. roller; 104. water tank; 105. handle; 106. vehicle body; 107. connecting pipe; 108. nozzle; 2. steering adjustment device; 201. motor; 202. rotating rod; 203. gear A; 204. fixing rod; 205. two-way rack; 206. gear B; 207. sliding sleeve; 208. through hole; 3. lubrication device; 301. positioning plate; 302. air bag; 303. spring A; 304. dropper; 305. oil pipe; 306. fixing plate; 307. oil tank; 4. pressure device; 401. pipeline; 402. sealing rubber ring A; 403. push rod; 404. sealing rubber ring B; 405. spring B; 406. half gear; 407. one-way rack; 408. triangle plate. DETAILED DESCRIPTION

[0021] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] Example 1 like Figure 1 to Figure 8 The present embodiment provides an adjustable garden irrigation device, including an irrigation device 1, the irrigation device 1 including a base 101, a long rod 102 is passed through one side of the base 101, and is rotatably connected to the long rod 102, a roller 103 is fixedly connected to one end of the long rod 102, a water tank 104 is fixedly connected to the top of the base 101, a handle 105 is fixedly connected to one side of the water tank 104, a body 106 is provided on one side of the base 101, a connecting pipe 107 is fixedly passed through one side of the water tank 104, and a spray pipe 108 is provided on the top of the body 106; A steering adjustment device 2 is provided on the outside of the irrigation device 1. The steering adjustment device 2 includes a motor 201. The motor 201 is fixedly connected to a side of the water tank 104 close to the connecting pipe 107. The output shaft of the motor 201 is fixedly connected to a rotating rod 202. The end of the rotating rod 202 away from the motor 201 is fixedly connected to a gear A203. The side of the motor 201 away from the water tank 104 is fixedly connected to a fixed rod 204. A bidirectional rack 205 is provided on the top of the fixed rod 204. One side of the bidirectional rack 205 is meshed with the gear A203. A gear B206 is provided on the side of the bidirectional rack 205 away from the gear A203. The gear B206 is meshed with the bidirectional rack 205. A sliding sleeve 207 is fixedly connected to the bottom of the gear B206. A through hole 208 is opened on the circumferential surface of the sliding sleeve 207.

[0023] One end of the connecting pipe 107 away from the water tank 104 passes through the circumferential surface of the nozzle 108. There are two long rods 102. The first long rod 102 is arranged on one side of the base 101, and the second long rod 102 is arranged on one side of the vehicle body 106. The above design is conducive to ensuring the stability of the device through the two long rods 102.

[0024] The fixing rod 204 is T-shaped, the inner wall of the sleeve 207 is rotatably connected to the end of the nozzle 108 away from the vehicle body 106, and the bidirectional rack 205 is located between the gear A203 and the gear B206. The above design is conducive to limiting the bidirectional rack 205 through the T-shaped fixing rod 204.

[0025] In this embodiment, the motor 201 is started by an external power source, so that the motor 201 drives the rotating rod 202 to rotate, so that the rotating rod 202 drives the gear A203 to rotate, and then the gear A203 drives the two-way rack 205 to move horizontally, so that the two-way rack 205 drives the gear B206 to rotate, and then the gear B206 drives the sleeve 207 to rotate, thereby achieving the effect of automatically adjusting the irrigation angle, making the irrigation more uniform, and contributing to the growth of vegetation.

[0026] Example 2 like Figure 4~Figure 6 Based on the same concept as the above-mentioned embodiment 1, this embodiment further proposes an adjustable garden irrigation device, including an irrigation device 1, a lubricating device 3 is arranged outside the irrigation device 1, and the lubricating device 3 includes a positioning plate 301, one side of the positioning plate 301 is fixedly connected to one end of the fixed rod 204, an air bag 302 is fixedly connected to the side of the positioning plate 301 close to the fixed rod 204, a spring A303 is fixedly connected to the inner wall of the air bag 302, a dropper 304 is fixedly penetrated on the circumferential surface of the air bag 302, a fixing plate 306 is fixedly connected to the side of the vehicle body 106 close to the nozzle 108, an oil tank 307 is fixedly connected to the side of the fixing plate 306 away from the vehicle body 106, an oil pipe 305 is fixedly penetrated on the circumferential surface of the air bag 302, and one end of the oil pipe 305 away from the air bag 302 is fixedly penetrated in the oil tank 307. The above design is conducive to lubricating the components in the device and facilitating the increase of service life.

[0027] There are two positioning plates 301, which are symmetrical along the vertical center axis of the fixed rod 204. There are two airbags 302, which are symmetrical along the vertical center axis of the fixed rod 204. There are two droppers 304, which are symmetrical along the center point of the two-way rack 205. The above design is conducive to the displacement of the two-way rack 205, thereby squeezing the airbag 302 and causing the airbag 302 to shrink under force.

[0028] Gear A203 is located at the opening of the first dropper 304, gear B206 is located at the opening of the second dropper 304, the airbag 302 is located on the displacement track of the bidirectional rack 205, there are two fixing plates 306, and they are symmetrical to each other along the vertical center axis of the vehicle body 106. The above design is conducive to lubricating different components in the device through two droppers 304.

[0029] In this embodiment, when the bidirectional rack 205 is displaced in the horizontal direction, the bidirectional rack 205 squeezes the airbag 302, so that the airbag 302 is forced to shrink. When the bidirectional rack 205 moves away from the airbag 302, the airbag 302 expands due to the tension of the internal spring A303, and at the same time, the airbag 302 absorbs the oil in the oil pipe 305 into the inside of the airbag 302 through the oil pipe 305. When the bidirectional rack 205 squeezes the airbag 302 again, the airbag 302 drips the oil onto the components through the dropper 304, thereby achieving the effect of lubricating the components in the device and increasing the service life of the device.

[0030] Example 3 like Figure 7~Figure 8 Based on the same concept as the above-mentioned embodiment 2, this embodiment further proposes an adjustable garden irrigation device, including an irrigation device 1, a pressure device 4 is arranged outside the irrigation device 1, and the pressure device 4 includes a pipe 401, one end of the pipe 401 is fixedly passed through the side of the water tank 104 close to the motor 201, a sealing rubber ring A402 is fixedly connected to the inner wall of the pipe 401, a push rod 403 is slidably connected to the inner wall of the pipe 401, and a sealing rubber ring B404 is sleeved on one end of the push rod 403 close to the inner wall of the pipe 401, and a sealing rubber ring B404 is fixedly connected to the one end of the push rod 403 close to the sealing rubber ring B404. Spring B405, one end of the spring B405 away from the push rod 403 is fixedly connected to the inner wall of the pipe 401, and the end of the rotating rod 202 away from the motor 201 is penetrated by a half gear 406 and is fixedly connected to the half gear 406. A one-way rack 407 is provided on one side of the half gear 406, and the one-way rack 407 is meshed with the half gear 406. A triangular plate 408 is fixedly connected to one side of the one-way rack 407. The above design is conducive to pressurizing the water tank 104 through the pressure device 4, so that the liquid in the water tank 104 can be transported to the nozzle 108 through the connecting pipe 107.

[0031] One end of the push rod 403 away from the spring B405 is located on the displacement trajectory of the inclined surface of the triangular plate 408, one end of the pipe 401 away from the push rod 403 is located inside the water tank 104, and the sealing rubber ring A402 is located on the displacement trajectory of the sealing rubber ring B404. The above design is conducive to ensuring the sealing of the pipe 401 through the sealing rubber ring A402 and the sealing rubber ring B404.

[0032] The pipe 401 is located between the motor 201 and the vehicle body 106 , the half gear 406 is located between the gear A203 and the motor 201 , the pipe 401 is Z-shaped, and the pipe 401 is located above the vehicle body 106 . The above design is conducive to better pressurizing the water tank 104 through the Z-shaped pipe 401 .

[0033] There are two oil tanks 307 symmetrically arranged along the vertical center axis of the vehicle body 106 , and there are two springs A303 symmetrically arranged along the vertical center axis of the fixing rod 204 . The above design is conducive to transporting oil to the airbag 302 through the two oil tanks 307 .

[0034] In this embodiment, the rotating rod 202 rotates, thereby driving the half gear 406 of the rotating rod 202 to rotate, and then the half gear 406 drives the one-way rack 407 to move in the vertical direction, so that the one-way rack 407 drives the triangular plate 408 to move in the vertical direction, and then the triangular plate 408 squeezes the push rod 403, so that the push rod 403 pushes the air in the pipe 401 into the water tank 104, thereby achieving the effect of pressurizing the water tank 104, so that the water tank 104 can better transport the liquid to the nozzle 108 through the connecting pipe 107.

[0035] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A regulating garden irrigation device, characterized in that: The irrigation device (1) comprises a base (101), a long rod (102) passing through one side of the base (101) and being rotatably connected to the long rod (102), a roller (103) being fixedly connected to one end of the long rod (102), a water tank (104) being fixedly connected to the top of the base (101), a handle (105) being fixedly connected to one side of the water tank (104), a vehicle body (106) being provided on one side of the base (101), a connecting pipe (107) being fixedly passing through one side of the water tank (104), and a spray pipe (108) being provided on the top of the vehicle body (106); The irrigation device (1) is provided with a steering adjustment device (2) on the outside. The steering adjustment device (2) comprises a motor (201). The motor (201) is fixedly connected to a side of the water tank (104) close to the connecting pipe (107). The output shaft of the motor (201) is fixedly connected to a rotating rod (202). The end of the rotating rod (202) away from the motor (201) is fixedly connected to a gear A (203). The side of the motor (201) away from the water tank (104) is fixedly connected to a fixing rod. (204), a bidirectional rack (205) is arranged on the top of the fixed rod (204), one side of the bidirectional rack (205) is meshed with the gear A (203), a gear B (206) is arranged on the side of the bidirectional rack (205) away from the gear A (203), the gear B (206) and the bidirectional rack (205) are meshed with each other, and a sliding sleeve (207) is fixedly connected to the bottom of the gear B (206), and a through hole (208) is opened on the circumferential surface of the sliding sleeve (207).

2. The adjustable garden irrigation equipment according to claim 1, characterized in that: One end of the connecting pipe (107) away from the water tank (104) passes through the circumferential surface of the nozzle (108), and the number of the long rods (102) is two, the first long rod (102) is arranged on one side of the base (101), and the second long rod (102) is arranged on one side of the vehicle body (106).

3. The adjustable garden irrigation equipment according to claim 2, characterized in that: The fixing rod (204) is T-shaped, the inner wall of the sliding sleeve (207) is rotatably connected to an end of the nozzle (108) away from the vehicle body (106), and the bidirectional rack (205) is located between the gear A (203) and the gear B (206).

4. The adjustable garden irrigation equipment according to claim 3, characterized in that: The irrigation device (1) is provided with a lubricating device (3) on the outside. The lubricating device (3) comprises a positioning plate (301). One side of the positioning plate (301) is fixedly connected to one end of a fixing rod (204). The side of the positioning plate (301) close to the fixing rod (204) is fixedly connected to an air bag (302). The inner wall of the air bag (302) is fixedly connected to a spring A (303). A dropper (304) is fixedly penetrated through the circumferential surface of the air bag (302). The side of the vehicle body (106) close to the nozzle (108) is fixedly connected to the fixing plate (306). The side of the fixing plate (306) away from the vehicle body (106) is fixedly connected to an oil tank (307). An oil pipe (305) is fixedly penetrated through the circumferential surface of the air bag (302). One end of the oil pipe (305) away from the air bag (302) is fixedly penetrated through the oil tank (307).

5. The adjustable garden irrigation equipment according to claim 4, characterized in that: The number of the positioning plates (301) is two and they are symmetrical to each other along the vertical center axis of the fixed rod (204); the number of the air bags (302) is two and they are symmetrical to each other along the vertical center axis of the fixed rod (204); the number of the droppers (304) is two and they are symmetrical to each other along the center point of the bidirectional rack (205).

6. The adjustable garden irrigation equipment according to claim 5, characterized in that: The gear A (203) is located at the opening of the first dropper (304), the gear B (206) is located at the opening of the second dropper (304), the airbag (302) is located on the displacement track of the bidirectional rack (205), and the number of the fixing plates (306) is two and they are symmetrical to each other along the vertical center axis of the vehicle body (106).

7. The adjustable garden irrigation equipment according to claim 6, characterized in that: The irrigation device (1) is provided with a pressure device (4) on the outside. The pressure device (4) comprises a pipe (401). One end of the pipe (401) is fixedly passed through a side of the water tank (104) close to the motor (201). A sealing rubber ring A (402) is fixedly connected to the inner wall of the pipe (401). A push rod (403) is slidably connected to the inner wall of the pipe (401). A sealing rubber ring B (404) is sleeved on one end of the push rod (403) close to the inner wall of the pipe (401). The push rod (403) close to the sealing rubber ring B (404) is sleeved on the inner wall of the pipe (401). One end of the rotating rod (202) is fixedly connected to a spring B (405), and one end of the spring B (405) away from the push rod (403) is fixedly connected to the inner wall of the pipe (401). One end of the rotating rod (202) away from the motor (201) is penetrated by a half gear (406) and is fixedly connected to the half gear (406). A one-way rack (407) is provided on one side of the half gear (406), and the one-way rack (407) and the half gear (406) are meshed with each other. One side of the one-way rack (407) is fixedly connected to a triangular plate (408).

8. The adjustable garden irrigation equipment according to claim 7, characterized in that: One end of the push rod (403) away from the spring B (405) is located on the displacement track of the inclined surface of the triangular plate (408), one end of the pipe (401) away from the push rod (403) is located inside the water tank (104), and the sealing rubber ring A (402) is located on the displacement track of the sealing rubber ring B (404).

9. The adjustable garden irrigation equipment according to claim 8, characterized in that: The pipeline (401) is located between the motor (201) and the vehicle body (106), the half gear (406) is located between the gear A (203) and the motor (201), the pipeline (401) is in a Z shape, and the pipeline (401) is located above the vehicle body (106).

10. The adjustable garden irrigation equipment according to claim 9, characterized in that: The number of the oil tanks (307) is two and they are symmetrical to each other along the vertical center axis of the vehicle body (106); the number of the springs A (303) is two and they are symmetrical to each other along the vertical center axis of the fixing rod (204).

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