Secondary surface finishing device for slip-form construction of road shoulder plate and shallow butterfly-shaped side ditch

Abstract

The utility model belongs to the technical field of auxiliary engineering cast-in-place slip-form construction, and particularly relates to a secondary surface finishing device for slip-form construction of a road shoulder plate and a shallow butterfly-shaped side ditch, which comprises a vehicle frame which is positioned above a slip-form construction completion part and is of a rectangular frame structure, and two ends of the vehicle frame extend to the outer side of the slip-form construction completion part; the four walking wheels are arranged at the four corners of the vehicle frame correspondingly, when the four walking wheels are parallel to the construction direction of the slip form, the vehicle frame can be supported to move on the ground, and when the front walking wheel and the rear walking wheel on the same side are in a splayed state, the vehicle frame can be locked to the ground; the wheel control structure is mounted on the frame and can control switching of two states of the traveling wheels; the supporting structure is fixedly mounted above the frame; and the top of the trowelling structure is clamped with the supporting structure, and the bottom of the trowelling structure extends to the position below the frame and can be attached to the construction completed part of the slip form. The secondary trowelling device has the advantage that secondary trowelling and surface finishing can be carried out on an area needing trowelling according to construction conditions.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of the construction of the cast-in-situ slip form of the accessory engineering, in particular to a shoulder plate and shallow butterfly-shaped gutter slip form construction secondary surface collecting device. BACKGROUND

[0002] The cast-in-situ slip form construction is the key and difficulty of the construction of the accessory engineering, and whether the construction process guarantees quality and progress requirements directly affects the construction progress of the entire accessory engineering, the slip form transportation and installation of the prefabricated shoulder plate and gutter have large loss and high cost, the prefabricated component is heavy and inconvenient to install, manpower and machinery are increased, and cost is further increased. UTILITY MODEL CONTENTS

[0003] Therefore, the utility model provides a shoulder plate and shallow butterfly-shaped gutter slip form construction secondary surface collecting device, so as to solve or at least alleviate the above problems in the prior art.

[0004] In order to realize the foregoing purpose, the utility model provides a shoulder plate and shallow butterfly-shaped gutter slip form construction secondary surface collecting device, which comprises a vehicle frame located above the slip form construction completed part, which is a rectangular frame structure, and both ends extend to the outside of the slip form construction completed part.

[0005] Walking wheels are arranged at four corners of the vehicle frame, and when the four walking wheels are parallel to the slip form construction direction, the vehicle frame can be supported on the ground, and when the front and rear walking wheels on the same side are in an "eight" shape, the vehicle frame can be locked on the ground.

[0006] A wheel control structure is installed on the vehicle frame and can control the switching of the two states of the walking wheels.

[0007] A support structure is installed above the vehicle frame.

[0008] A smoothing structure is connected to the top of the support structure and extends to the bottom of the vehicle frame, and when the smoothing structure is separated from the support structure, the smoothing structure can be supported by the wheel control structure, and the bottom can be attached to the slip form construction completed part.

[0009] In the shoulder plate and shallow butterfly-shaped gutter slip form construction secondary surface collecting device, the wheel control structure comprises two synchronous frames arranged symmetrically on the top of the vehicle frame, and the bottom of the front and rear ends of the synchronous frame is connected to the vehicle frame in a sliding manner, and the synchronous frame can slide in the transverse direction of the vehicle frame.

[0010] Two U-shaped sliding plates are symmetrically arranged on the top of the frame, and can horizontally displace on the frame, and are slidably connected with the synchronous frame in the front-rear direction, and can drive the synchronous frame to horizontally displace on the frame when the U-shaped sliding plate horizontally displaces on the frame.

[0011] First and second connecting rods, a first connecting rod is rotatably installed on the top of each of the front and rear ends of the synchronous frame, and a second connecting rod is rotatably installed on the end of the first connecting rod away from the synchronous rod.

[0012] Four rotating shafts are rotatably installed at the four corners of the frame, and the walking wheels are fixedly installed on the rotating shafts, and the end of the second connecting rod away from the first connecting rod is fixedly connected to the top of the rotating shaft.

[0013] In the device, a plurality of limiting holes are uniformly arranged on the walking wheel in the circumferential direction, and a telescopic rod is arranged on the frame, and when the walking wheel is in the "8" shape, the telescopic rod can be inserted into the limiting hole.

[0014] In the device, the support structure includes two inverted U-shaped frames symmetrically fixedly installed on the top of the frame, and the U-shaped frames are located between the left and right synchronous frames.

[0015] A support rod is slidably installed on the U-shaped frame and can slide with the U-shaped frame in the front-rear direction.

[0016] A U-shaped support plate is fixedly installed on the support rod, and the top of the smoothing structure can be clamped on the U-shaped support plate.

[0017] In the device, the smoothing structure includes three smoothing plates corresponding to the two arc-shaped regions and one horizontal region of the slip-form construction part.

[0018] A third connecting rod is arranged above each smoothing plate, the bottom of the third connecting rod passes through the U-shaped sliding plate and extends above the U-shaped sliding plate.

[0019] A T-shaped rotating rod is rotatably installed on the top of the third connecting rod, the number of T-shaped rotating rods is consistent with the number of U-shaped support plates, and the T-shaped rotating rod can be clamped on the U-shaped support plate.

[0020] A limiting block is fixedly installed on the third connecting rod, the limiting block is located between the T-shaped rotating rod and the U-shaped sliding plate, and the limiting block can be supported by the U-shaped sliding plate.

[0021] In the secondary surface collecting device for road shoulder plate and shallow butterfly-shaped gutter slip form construction, opposites of the U-shaped sliding plates are provided with first connecting plates, the first connecting plates are invertedly buckled on the frame, the first connecting plates are in sliding fit with the U-shaped sliding plates in the front-rear direction, opposite surfaces of the third connecting rods on the left and the third connecting rods on the right are provided with second connecting plates, the second connecting plates are fixedly installed on the top of the frame, and the U-shaped sliding plates are overlapped on the second connecting plates.

[0022] In the secondary surface collecting device for road shoulder plate and shallow butterfly-shaped gutter slip form construction, opposites of the U-shaped sliding plates are provided with first connecting plates, the first connecting plates are invertedly buckled on the frame, the first connecting plates are in sliding fit with the U-shaped sliding plates in the front-rear direction, opposite surfaces of the third connecting rods on the left and the third connecting rods on the right are provided with second connecting plates, the second connecting plates are fixedly installed on the top of the frame, and the U-shaped sliding plates are overlapped on the second connecting plates.

[0023] In the secondary surface collecting device for road shoulder plate and shallow butterfly-shaped gutter slip form construction, opposites of the U-shaped sliding plates are provided with first connecting plates, the first connecting plates are invertedly buckled on the frame, the first connecting plates are in sliding fit with the U-shaped sliding plates in the front-rear direction, opposite surfaces of the third connecting rods on the left and the third connecting rods on the right are provided with second connecting plates, the second connecting plates are fixedly installed on the top of the frame, and the U-shaped sliding plates are overlapped on the second connecting plates.

[0024] In the secondary surface collecting device for road shoulder plate and shallow butterfly-shaped gutter slip form construction, opposites of the U-shaped sliding plates are provided with first connecting plates, the first connecting plates are invertedly buckled on the frame, the first connecting plates are in sliding fit with the U-shaped sliding plates in the front-rear direction, opposite surfaces of the third connecting rods on the left and the third connecting rods on the right are provided with second connecting plates, the second connecting plates are fixedly installed on the top of the frame, and the U-shaped sliding plates are overlapped on the second connecting plates. BRIEF DESCRIPTION OF DRAWINGS

[0025] The disclosure will be more apparent with reference to the drawings. It should be understood that the drawings are only for the purpose of illustration, and are not intended to limit the scope of protection of the present application. In the drawings:

[0026] Fig. 1 It is an overall structure schematic view when the walking wheel of the present application is parallel to the slip form construction direction.

[0027] Fig. 2 It is an overall structure schematic view when the walking wheel of the present application is in an "eight" shape.

[0028] Fig. 3 It is a connection structure schematic view of the wheel control structure and the smoothing structure on the left side.

[0029] Fig. 4 The utility model discloses a left side's wheel control structure's connecting structure schematic drawing.

[0030] Fig. 1, car frame 2, walking wheel 2-1, limiting hole 3, wheel control structure 3-1, synchronous frame 3-2, U type sliding plate 3-3, first connecting rod 3-4, second connecting rod 3-4, pivot 4, support structure 4-1, U type frame 4-2, support rod 4-3, U type support plate 5, troweling structure 5-1, troweling plate 5-2, third connecting rod 5-3, T type rotary rod 5-4, limiting block 6, telescopic rod 7, first connecting plate 8, second connecting plate 9, handle 10, clamping plate 11, extension rod. DETAILED DESCRIPTION

[0031] The technical scheme in the embodiments of the utility model will be described clearly and completely below, and obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without making creative labor belong to the protection scope of the utility model.

[0032] As Figs. 1 to 4 The utility model discloses a road shoulder board and shallow butterfly shape side ditch slip form construction secondary surface receiving device, including car frame 1, walking wheel 2, wheel control structure 3, support structure 4 and troweling structure 5.

[0033] First, car frame 1 is placed on the upper side of the part that has just completed slip form construction, and the center of car frame 1 is a rectangular frame structure, and the two ends of car frame 1 extend to the outside of the part that has just completed slip form construction, and four walking wheels 2 are located at the four corners of car frame 1 and can support car frame 1 by contacting the ground.

[0034] Wheel control structure 3 is installed on car frame 1, and wheel control structure 3 is transversely displaced on car frame 1 to control walking wheel 2 to switch between parallel state and "eight" letter shape state, when four walking wheels 2 are all parallel to the slip form construction direction, car frame 1 can be supported to displace on the ground, and when the front and rear two walking wheels 2 on the same side are in "eight" letter shape state, car frame 1 can be locked on the ground.

[0035] The support structure 4 is installed above the vehicle frame 1, the top of the troweling structure 5 is clamped on the support structure 4, the bottom of the troweling structure 5 extends below the vehicle frame 1, the bottom of the troweling structure 5 does not contact the completed slip-form construction part, when the troweling structure 5 is separated from the support structure 4, the troweling structure 5 is displaced downward to the wheel control structure 3, the troweling structure 5 is supported by the wheel control structure 3, the bottom of the troweling structure 5 is attached to the completed slip-form construction part, and the wheel control structure 3 is displaced forward and backward on the vehicle frame 1 to enable the bottom of the troweling structure 5 to slide on the surface of the completed slip-form construction part, thereby completing the secondary finishing work.

[0036] In one specific embodiment of the wheel control structure 3 for controlling the switching state of the walking wheel 2, the wheel control structure 3 comprises:

[0037] The synchronization frame 3-1 is provided with two left and right symmetrical synchronization frames 3-1 arranged on the top of the vehicle frame 1, the bottom of the front and rear ends of the synchronization frame 3-1 is in sliding connection with the vehicle frame 1, and the synchronization frame 3-1 can slide in cooperation with the vehicle frame 1 in the transverse direction.

[0038] The U-shaped sliding plate 3-2 is provided with two left and right symmetrical U-shaped sliding plates 3-2 arranged on the top of the vehicle frame 1, the U-shaped sliding plate 3-2 is lapped on the frame part in the middle of the vehicle frame 1, the opening of the U-shaped sliding plate 3-2 faces the center of the vehicle frame 1, the top of the outer end of the U-shaped sliding plate 3-2 is in sliding cooperation with the synchronization frame 3-1 in the front and rear direction, and the transverse displacement of the U-shaped sliding plate 3-2 on the vehicle frame 1 can drive the transverse displacement of the synchronization frame 3-1 on the vehicle frame 1.

[0039] The first connecting rod 3-3 and the second connecting rod 3-4 are provided, the top of the front and rear ends of the synchronization frame 3-1 is rotatably installed with one first connecting rod 3-3, and the second connecting rod 3-4 is rotatably installed at the end of the first connecting rod 3-3 away from the synchronization rod.

[0040] The rotating shaft 3-5 is provided with four rotating shafts 3-5 rotatably installed at the four corners of the vehicle frame 1, the walking wheel 2 is fixedly installed on the rotating shaft 3-5, and the end of the second connecting rod 3-4 away from the first connecting rod 3-3 is fixedly connected to the top of the rotating shaft 3-5.

[0041] When the U-shaped sliding plate 3-2 drives the synchronization frame 3-1 to slide outward transversely to the farthest distance, the first connecting rod 3-3 drives the second connecting rod 3-4 to swing outward with the rotating shaft 3-5 as the center, so that the rotating shaft 3-5 drives the walking wheel 2 to rotate outward to a state parallel to the completed slip-form construction part; when the U-shaped sliding plate 3-2 drives the synchronization frame 3-1 to slide inward transversely to the farthest distance, the first connecting rod 3-3 drives the second connecting rod 3-4 to swing inward with the rotating shaft 3-5 as the center, so that the rotating shaft 3-5 drives the walking wheel 2 to rotate inward, and the left and right front and rear walking wheels 2 are all deflected to an "eight" shape.

[0042] In a relatively specific embodiment, a plurality of limiting holes 2-1 are evenly arranged on the walking wheel 2 in the circumferential direction, and the frame 1 is provided with a telescopic rod 6, which is arranged corresponding to the walking wheel 2. When the two walking wheels 2 on the same side are in the "eight" shape, the front end of the telescopic rod 6 can be inserted into the limiting hole 2-1, so as to lock the walking wheel 2 in the "eight" shape. At this time, the U-shaped sliding plate 3-2 cannot be transversely displaced on the frame 1.

[0043] The support structure 4 includes:

[0044] The inverted U-shaped frame 4-1 is fixedly installed on the top of the frame 1, and the U-shaped frame 4-1 is located between the left and right synchronous frames 3-1.

[0045] The support rod 4-2 is slidably installed on the U-shaped frame 4-1 and can be slidably connected with the U-shaped frame 4-1 in the front-rear direction.

[0046] The U-shaped support plate 4-3 is fixedly installed on the support rod 4-2, and the top of the troweling structure 5 can be clamped on the U-shaped support plate 4-3.

[0047] The troweling structure 5 includes:

[0048] The troweling plate 5-1 is provided with three, which correspond to two arc-shaped regions and one horizontal region of the slip-form construction part. When one of the regions needs to be troweled, the three troweling plates 5-1 can be individually troweled.

[0049] The third connecting rod 5-2 is provided with one above each troweling plate 5-1, and the top of the third connecting rod 5-2 penetrates through the U-shaped sliding plate 3-2 and extends above the U-shaped sliding plate 3-2.

[0050] The T-shaped rotating rod 5-3 is rotatably installed on the top of the third connecting rod 5-2, and the number of the T-shaped rotating rod 5-3 is consistent with the number of the U-shaped support plate 4-3. When the T-shaped rotating rod 5-3 is rotated to be parallel to the support rod 4-2, the T-shaped rotating rod 5-3 can be clamped on the U-shaped support plate 4-3, and the troweling plate 5-1 is not in contact with the slip-form construction part. When the T-shaped rotating rod 5-3 is rotated to be perpendicular to the support rod 4-2, the T-shaped rotating rod 5-3 is separated from the U-shaped support plate 4-3, and the T-shaped rotating rod 5-3 can be displaced downward from the opening of the U-shaped support plate 4-3 to below the U-shaped frame 4-1.

[0051] The limiting block 5-4 is fixedly installed on the third connecting rod 5-2, and is located between the T-shaped rotating rod 5-3 and the U-shaped sliding plate 3-2. When the T-shaped rotating rod 5-3 is separated from the U-shaped support plate 4-3, the limiting block 5-4 can be supported by the U-shaped sliding plate 3-2. When the limiting block 5-4 is supported by the U-shaped sliding plate 3-2, the troweling plate 5-1 is attached to the slip-form construction part.

[0052] In a relatively specific embodiment, the opposite ends of the U-shaped sliding plate 3-2 are provided with first connecting plates 7, which are invertedly buckled on the vehicle frame 1. The first connecting plates 7 are in sliding fit with the U-shaped sliding plate 3-2 in the front-rear direction, and the U-shaped sliding plate 3-2 can drive the first connecting plates 7 to slide laterally on the vehicle frame 1.

[0053] The opposite faces of the left third connecting rod 5-2 and the right third connecting rod 5-2 are provided with second connecting plates 8, which are fixedly installed on the top of the vehicle frame 1. The U-shaped sliding plate 3-2 is lapped on the second connecting plates 8.

[0054] When the U-shaped sliding plate 3-2 drives the synchronous frame 3-1 to slide laterally inward to the farthest distance, the left third connecting rod 5-2 is located between the left synchronous frame 3-1 and the left second connecting plate 8. The limiting block 5-4 on the left third connecting rod 5-2 can be clamped on the left U-shaped sliding plate 3-2. The middle third connecting rod 5-2 is located between the two first connecting plates 7, and the limiting block 5-4 on the middle third connecting rod 5-2 can be clamped at the joint of the two U-shaped sliding plates 3-2. The right third connecting rod 5-2 is located between the right second connecting plate 8 and the right synchronous frame 3-1. The limiting block 5-4 on the right third connecting rod 5-2 can be clamped on the right U-shaped sliding plate 3-2. The front-rear displacement of the U-shaped sliding plate 3-2 can drive the front-rear displacement of the third connecting rod 5-2. When the third connecting rod 5-2 is supported by the U-shaped sliding plate 3-2, the front-rear displacement of the third connecting rod 5-2 can realize the secondary troweling and surface collection of the slip-form construction part by the troweling plate 5-1.

[0055] In a relatively specific embodiment, the opposite ends of the two U-shaped sliding plates 3-2 are provided with a handle 9, which is located on the top of the U-shaped sliding plate 3-2. Two construction workers control the handles 9 on both sides to control the lateral displacement of the U-shaped sliding plate 3-2 on the vehicle frame 1, so that the walking wheel 2 locks or unlocks the vehicle frame 1. In the case that the walking wheel 2 locks the vehicle frame 1, the troweling structure 5 is supported by the U-shaped sliding plate 3-2, and then the front-rear displacement realizes the troweling and surface collection of the slip-form construction part.

[0056] The left and right sides of the frame 1 are fixedly provided with a pair of clamping plates 10, each pair of clamping plates 10 is symmetrically arranged front and back, when the U-shaped sliding plate 3-2 is displaced outward to the maximum distance, the U-shaped sliding plate 3-2 is located between the same side front and back two clamping plates 10, at this time, two construction workers can simultaneously control the handle 9 to push the frame 1 to make it walk on the ground along the sliding form construction direction.

[0057] In a relatively specific embodiment, the bottom end of the telescopic rod 6 is provided with an extension rod 11 through the frame 1, the extension rod 11 can control the telescopic rod 6 to be telescopic, when the walking wheel 2 is locked by the telescopic rod 6, the extension rod 11 can facilitate the construction worker to control the telescopic rod 6 to be pulled out of the limiting hole 2-1, and the walking wheel 2 is unlocked, so that the U-shaped sliding plate 3-2 can be displaced outward laterally.

[0058] The technical scope of the utility model is not only limited to the content in the above description, and the person skilled in the art can make various deformations and modifications to the above embodiment without departing from the technical thought of the utility model, and these deformations and modifications should all belong to the range of the utility model.

Claims

1. A secondary finishing device for shoulder board and shallow butterfly-shaped trench slip-form construction, characterized in that, The utility model relates to a kind of construction vehicle, including: Frame (1), located above the slipform construction part, it is rectangular frame structure, and both ends are extended to the outside of slipform construction part; Walking wheel (2), it is provided with one in the four corners of frame (1), when four walking wheel (2) are parallel to the state of slipform construction direction, it can support frame (1) displacement on ground, when same side's front and rear two walking wheel (2) are in "eight” shape state, it can lock frame (1) on ground; Wheel control structure (3), it is installed on frame (1), it can control the switching of two states of walking wheel (2); Supporting structure (4), it is installed above frame (1); Trowelling structure (5), top and supporting structure (4) are connected, bottom extends to the below of frame (1), when trowelling structure (5) and supporting structure (4) are separated, trowelling structure (5) can be supported by wheel control structure (3), and bottom can be attached with slipform construction part.

2. The device according to claim 1, characterized in that, The wheel control structure (3) includes: Synchronous frame (3-1), it is provided with two, respectively left and right symmetrical setting in the top of frame (1), and the bottom of front and rear two ends of synchronous frame (3-1) is slidably connected with frame (1), synchronous frame (3-1) can be slidably fitted with frame (1) in transverse direction; U-shaped sliding plate (3-2), it is provided with two, respectively left and right symmetrical setting in the top of frame (1), U-shaped sliding plate (3-2) can be displaced in transverse direction on frame (1), U-shaped sliding plate (3-2) is slidably connected with synchronous frame (3-1) in front and rear direction, U-shaped sliding plate (3-2) can drive synchronous frame (3-1) to be displaced in transverse direction on frame (1) when it is displaced in transverse direction on frame (1); First connecting rod (3-3) and second connecting rod (3-4), the top of front and rear two ends of synchronous frame (3-1) is rotatably installed with one first connecting rod (3-3), the second connecting rod (3-4) is rotatably installed at one end of first connecting rod (3-3) away from synchronous rod; Rotating shaft (3-5), it is provided with four, and is rotatably installed in the four corners of frame (1), walking wheel (2) is fixedly installed on rotating shaft (3-5), the end of second connecting rod (3-4) away from first connecting rod (3-3) is fixedly connected in the top of rotating shaft (3-5).

3. A device for secondary finishing of a shoulder board and shallow butterfly-shaped edge ditch slip form construction according to claim 2, characterized in that, Multiple limiting holes (2-1) are evenly provided on walking wheel (2) in circumferential direction, and telescopic rod (6) is provided on frame (1), when walking wheel (2) is in "eight” shape state, telescopic rod (6) can be inserted into limiting hole (2-1).

4. The device according to claim 2, wherein the device is characterized by: The supporting structure (4) includes: Inverted U-shaped frame (4-1), it is provided with two, and is fixedly installed in the top of frame (1) respectively left and right symmetrical, U-shaped frame (4-1) is located between left and right two synchronous frames (3-1); Supporting rod (4-2), it is slidably installed on U-shaped frame (4-1), and can be slidably fitted with U-shaped frame (4-1) in front and rear direction; The U-shaped support plate (4-3) is fixedly installed on the support rod (4-2), and the top of the troweling structure (5) can be clamped on the U-shaped support plate (4-3).

5. The device according to claim 4, wherein the device is characterized by: The troweling structure (5) comprises: The troweling plate (5-1) is provided with three, corresponding to two arc-shaped regions and one horizontal region of the slip-form construction part; The third connecting rod (5-2) is provided with one above each troweling plate (5-1), the bottom of the third connecting rod (5-2) passes through the U-shaped sliding plate (3-2) and extends above the U-shaped sliding plate (3-2); The T-shaped rotating rod (5-3) is rotatably installed at the top of the third connecting rod (5-2), the number of the T-shaped rotating rod (5-3) is consistent with the number of the U-shaped support plate (4-3), and the T-shaped rotating rod (5-3) can be clamped on the U-shaped support plate (4-3); The limiting block (5-4) is fixedly installed on the third connecting rod (5-2), the limiting block (5-4) is located between the T-shaped rotating rod (5-3) and the U-shaped sliding plate (3-2), and the limiting block (5-4) can be supported by the U-shaped sliding plate (3-2).

6. A device for secondary finishing of a shoulder board and shallow butterfly-shaped gutter slip-form construction according to claim 5, characterized in that The opposite ends of the U-shaped sliding plate (3-2) are provided with the first connecting plate (7), the first connecting plate (7) is invertedly buckled on the vehicle frame (1), the first connecting plate (7) and the U-shaped sliding plate (3-2) are in sliding fit in the front-rear direction, the opposite surfaces of the third connecting rod (5-2) on the left and the third connecting rod (5-2) on the right are provided with the second connecting plate (8), the second connecting plate (8) is fixedly installed on the top of the vehicle frame (1), and the U-shaped sliding plate (3-2) is lapped on the second connecting plate (8).

7. A device for secondary finishing of a shoulder board and shallow butterfly-shaped gutter slip-form construction according to claim 2, characterized in that The opposite ends of the two U-shaped sliding plates (3-2) are provided with one handle (9), the handle (9) is located at the top of the U-shaped sliding plate (3-2), the left and right sides of the vehicle frame (1) are fixedly installed with a pair of clamping plates (10), each pair of clamping plates (10) is symmetrically distributed in front and back, when the U-shaped sliding plate (3-2) is displaced to the maximum distance outward, the U-shaped sliding plate (3-2) is located between the two clamping plates (10) on the same side.

8. The device according to claim 3, wherein the device is characterized by: The bottom end of the telescopic rod (6) is provided with an extension rod (11) penetrating through the vehicle frame (1), and the extension rod (11) can control the telescopic rod (6) to be telescopic.

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