Detection equipment for intelligent driving to cope with complex ground
By designing detection equipment for intelligent driving to cope with complex ground, and using test drive belt components to simulate complex road surfaces, the problem of existing equipment being unable to detect sensor reactions when the front and rear wheels are also passing through complex road surfaces, achieving all-round detection of the perception capability of the intelligent driving system.
Patent Information
- Application Number
- CN202422121271.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-30
- Publication Date
- 2025-04-08
- Estimated Expiration
- 2034-08-30
AI Technical Summary
When existing inspection equipment simulates complex road surfaces, it is impossible to detect the overall reaction of intelligent driving sensors when the front and rear wheels pass through the same complex road surface.
A detection device for intelligent driving to cope with complex ground was designed, including intelligent driving detection base and test drive belt assembly. The vehicle is lifted to the detection base through unit lifting frames and chains, and the uneven road surface is simulated by using the test drive belt assembly, so that the front and rear wheels of the vehicle pass through the same complex road surface in turn to detect the reaction of the sensor.
It realizes all-round detection of intelligent driving sensors in complex road environments, and can simulate the front and rear wheels of the vehicle passing through the same complex road surface, thereby more accurately evaluating the perception ability of the intelligent driving system.
Smart Images
Figure CN222733849U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of intelligent driving detection, and in particular to detection equipment for intelligent driving to cope with complex ground. Background Art
[0002] The prerequisite for intelligent driving is that the vehicle we choose meets the dynamic requirements of driving, and the sensors on the vehicle can obtain relevant visual and auditory signals and information, and control the corresponding follow-up system through cognitive computing. Intelligent driving refers to the use of advanced technologies such as artificial intelligence, sensor technology, and machine learning to enable the car to drive without human or assisted driving. The intelligent driving system can improve driving safety, efficiency and comfort by sensing the surrounding environment, making decisions and controlling the car's driving.
[0003] Among them, the perception and recognition used in intelligent driving is to use various sensors such as cameras, lidars, radars, ultrasonic sensors, etc. to perceive the surrounding environment and identify objects and information such as roads, vehicles, pedestrians, and traffic signals. Especially in the face of some complex roads with uneven surfaces, there are very strict tests for the test responses of cameras, lidars, radars, ultrasonic sensors, etc. that perceive the surrounding environment in intelligent driving, and thus it is necessary to detect vehicles that deal with complex roads in intelligent driving. When dealing with some complex road detections with uneven surfaces, the existing inspection equipment simulates uneven roads in closed sections or on the rollers of dynamometers. However, the actual test cannot detect the overall response of the sensors that perceive the surrounding environment of intelligent driving when the front and rear wheels pass through the same complex road surface.
[0004] Therefore, in response to the problem that "existing inspection equipment, when dealing with some complex and uneven road surface inspections, mostly simulates uneven roads in closed sections or on the roller of a dynamometer, but actual tests cannot detect the overall reaction of sensors that use intelligent driving to perceive the surrounding environment when the front and rear wheels pass through the same complex road surface", a detection device for intelligent driving to deal with complex ground is specially proposed. Utility Model Content
[0005] The purpose of the embodiments of the utility model is to provide a detection device for intelligent driving to cope with complex terrain, aiming to solve the problem that the existing inspection equipment, when dealing with some complex uneven road surface detection, simulates the uneven road surface in a closed section or on the roller of a dynamometer, but the actual test cannot detect the reaction of the sensor for intelligent driving to perceive the surrounding environment in the process of the front and rear wheels passing through the same complex road surface as a whole.
[0006] Specifically: a detection device for intelligent driving to cope with complex ground, including an intelligent driving detection base, a plurality of unit lifting frames are installed around the intelligent driving detection base, and the unit lifting frames are used to cooperate with chains to lift the vehicle and limit it on the intelligent driving detection base; the intelligent driving detection base includes a bottom plate, and the unit lifting frames are installed on the bottom plate; two installation grooves are opened on the bottom plate, and the two installation grooves are distributed in parallel; a test transmission belt assembly is installed inside the installation groove, and the test transmission belt assembly includes a plurality of unit lifting plates, and the plurality of unit lifting plates are distributed in an array; the front and rear wheels on one side of the vehicle fall on a test transmission belt assembly, and after the local plurality of unit lifting plates rise or fall to form an uneven road surface, the test transmission belt assembly passes through the front and rear wheels on one side of the vehicle in turn during the rotation of the test transmission belt assembly, so as to simulate the front and rear wheels of the vehicle passing through the same complex road surface;
[0007] When the vehicle drives onto the intelligent driving detection base, the vehicle is lifted and limited on the intelligent driving detection base through the unit lifting frame and the chain, so that the front and rear wheels on one side of the vehicle fall on a test transmission belt assembly; after the vehicle is started, multiple unit lifting plates in one place or multiple local units are used to rise or fall to form an uneven road surface. During the rotation of the test transmission belt assembly, it passes through the front and rear wheels on one side of the vehicle in turn, so as to simulate the process of the front and rear wheels of the vehicle passing through the same complex road surface and detect the response of the sensors that perceive the surrounding environment of the intelligent driving.
[0008] The technical solution of this application is further described below:
[0009] In one embodiment, the test drive belt assembly further comprises a drive chain, the drive chain is meshed with a gear, and the gear is fixed on an output shaft of the motor.
[0010] Furthermore, the driving chain is composed of a plurality of chain links, and the plurality of chain links correspond to a plurality of unit lifting plates in a one-to-one manner; a guard plate is arranged outside the driving chain.
[0011] Furthermore, the unit lifting plate includes a storage plate and an outer convex plate, the outer convex plate is movably inserted in the storage plate, a storage cavity is provided on the storage plate to cooperate with the outer convex plate, the outer convex plate is movably inserted in the storage cavity, a cylinder three is installed in the storage cavity, one end of the cylinder three is fixed on the storage plate, and the other end is fixed on the outer convex plate; by adjusting the length of the cylinder three, the degree to which the outer convex plate extends to the outside of the storage plate, or the degree to which it is stored in the storage plate, can be adjusted to form an uneven road surface.
[0012] In one of the embodiments, the intelligent driving detection base also includes a mounting plate, which is integrally fixed to the base plate, and a plurality of mounting holes are provided on the mounting plate; a gentle slope is fixed at the end of one end of the base plate.
[0013] In one of the embodiments, the unit lifting frame includes a support member and a lifting member, the lifting member is installed on the base plate; the support member is installed on the lifting member; the support member is used to cooperate with the chain to lift the vehicle and limit it on the intelligent driving detection base; the lifting member is used to drive the support member to lift.
[0014] Furthermore, the support member includes a support plate, which is L-shaped, and a drag plate is movably inserted on the support plate, and the drag plate is used to lift the vehicle; a cylinder is fixed on the support plate, and a push plate is fixed on the end of the cylinder away from the support plate, and the push plate is fixed on the drag plate in an integral manner; the position of the drag plate inserted on the support plate is adjusted by extending and retracting the cylinder, so as to adjust the lateral displacement of the vehicle.
[0015] When the vehicle drives onto the intelligent driving detection base, the lifting part is started to drive the towing plate to be lifted under the vehicle; when the vehicle stops crookedly or the front and rear wheels of the vehicle are not in a straight line on the test drive belt assembly, the cylinder on one of the support plates is used to extend and retract to drive the towing plate to penetrate the support plate and adjust the degree of lateral displacement of the vehicle, so that the vehicle can be accurately parked on the test drive belt assembly, and the requirements for the parking accuracy of the vehicle are reduced, and the vehicle is lifted and limited on the intelligent driving detection base in conjunction with the chain set on the bottom plate.
[0016] Furthermore, the lifting member includes a fixed plate, which is installed on the base plate through a connecting plate; a second cylinder is fixed on the fixed plate, and the second cylinder is fixed on the support plate at the end away from the fixed plate; a guide column is fixed on the fixed plate on the side of the second cylinder, and the guide column is movably inserted on the support plate, and a reinforcement tube is fixed on the support plate to cooperate with the guide column, and the reinforcement tube is movably mounted on the guide column.
[0017] Compared with the existing technology, the intelligent driving detection equipment of the utility model for complex ground can achieve the following:
[0018] When the vehicle drives onto the intelligent driving test base, the unit lifting frame cooperates with the chain to lift the vehicle to limit the position on the intelligent driving test base, and completes the drop of the front and rear wheels on one side of the vehicle onto a test drive belt assembly; after the vehicle is started, multiple units of one local area, or multiple units of multiple local areas are used to rise or fall to form an uneven road surface, and the test drive belt assembly passes through the front and rear wheels on one side of the vehicle in turn during the rotation process, so as to simulate the front and rear wheels of the vehicle passing through the same complex road surface, and detect the reaction of the sensor that the intelligent driving perceives the surrounding environment;
[0019] When the vehicle drives onto the intelligent driving detection base, the lifting part is started to drive the towing plate to be lifted under the vehicle; when the vehicle stops crookedly or the front and rear wheels of the vehicle are not in a straight line on the test drive belt assembly, the cylinder on one of the support plates is used to extend and retract to drive the towing plate to penetrate the support plate and adjust the degree of lateral displacement of the vehicle, so that the vehicle can be accurately parked on the test drive belt assembly, and the requirements for the parking accuracy of the vehicle are reduced, and the vehicle is lifted and limited on the intelligent driving detection base in conjunction with the chain set on the bottom plate. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
[0021] Figure 1 This is a schematic diagram of the structure of the detection equipment for intelligent driving to cope with complex terrain in the utility model;
[0022] Figure 2 for Figure 1 Schematic diagram of the structure of the middle unit lifting frame;
[0023] Figure 3 for Figure 2 A schematic diagram of the structure of the middle support member;
[0024] Figure 4 for Figure 2 A schematic diagram of the structure of the middle lifting member;
[0025] Figure 5 for Figure 1 Schematic diagram of the structure of the intelligent driving detection base;
[0026] Figure 6 for Figure 5 A schematic diagram of the structure of the test drive belt assembly;
[0027] Figure 7 for Figure 6 A schematic cross-sectional view of the test drive belt assembly;
[0028] Figure 8 for Figure 7 Schematic diagram of the assembly structure of the middle unit lifting plate and driving chain.
[0029] In the accompanying drawings, the components represented by the reference numerals are listed as follows:
[0030] Unit lifting frame 100; support member 110, lifting member 120; reinforcing tube 1101, supporting plate 1102, cylinder 1 1103, push plate 1104, drag plate 1105; guide column 1201, cylinder 2 1202, fixing plate 1203, connecting plate 1204;
[0031] Intelligent driving detection base 200; mounting plate 210, bottom plate 220, test drive belt assembly 230, mounting groove 240, gentle slope 250; unit lifting plate 231 (storage plate 2311, outer convex plate 2312), guard plate 232, drive chain 233 (chain link 2331). DETAILED DESCRIPTION
[0032] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the utility model and are not used to limit the utility model. The specific implementation of the utility model is described in detail in conjunction with the specific embodiments.
[0033] In the embodiment of the utility model, Figure 1 , 5 -7: A detection device for intelligent driving to cope with complex ground, including an intelligent driving detection base 200, a plurality of unit lifting frames 100 are installed around the intelligent driving detection base 200, and the unit lifting frames 100 are used to cooperate with the chain to lift the vehicle and limit it on the intelligent driving detection base 200;
[0034] The “chain” and “various sensors such as cameras, laser radars, radars, ultrasonic sensors, etc., which detect the reaction of the sensors used by the intelligent driving to perceive the surrounding environment when the front and rear wheels are passing the same complex road surface” are all prior art. The utility model is intended to protect the simulation of providing the same complex road surface for the front and rear wheels. The detailed structures of the “chain” and “various sensors such as cameras, laser radars, radars, ultrasonic sensors, etc., which detect the reaction of the sensors used by the intelligent driving to perceive the surrounding environment when the front and rear wheels are passing the same complex road surface” can be found in existing literature journals, and can also be purchased directly on the market, or can be assembled from components purchased on the market, etc.; they are not intended to be protected by the present invention, and are not elaborated on here, nor drawn in the accompanying drawings;
[0035] The intelligent driving detection base 200 includes a bottom plate 220, and the unit lifting frame 100 is installed on the bottom plate 220; two mounting grooves 240 are opened on the bottom plate 220, and the two mounting grooves 240 are distributed in parallel; a test transmission belt assembly 230 is installed inside the mounting groove 240, and the test transmission belt assembly 230 includes a plurality of unit lifting plates 231, and the plurality of unit lifting plates 231 are distributed in an array;
[0036] The front and rear wheels of one side of the vehicle fall on a test belt assembly 230, and after the local multiple unit lifting plates 231 rise or fall to form an uneven road surface, the test belt assembly 230 passes through the front and rear wheels of one side of the vehicle in sequence during the rotation process, so as to simulate the front and rear wheels of the vehicle passing through the same complex road surface;
[0037] Furthermore, summarizing the above-mentioned situations, it can be learned that: when the vehicle drives onto the intelligent driving detection base 200, the unit lifting frame 100 is used in conjunction with the chain to lift the vehicle and limit it on the intelligent driving detection base 200, so that the front and rear wheels on one side of the vehicle are placed on a test transmission belt assembly 230; after the vehicle is started, multiple unit lifting plates 231 are used in one place, or multiple unit lifting plates 231 are used in multiple places to rise or fall to form an uneven road surface. During the rotation of the test transmission belt assembly 230, the front and rear wheels on one side of the vehicle are passed in sequence, so as to simulate the process in which the front and rear wheels of the vehicle pass through the same complex road surface, and detect the reaction of the sensors that perceive the surrounding environment of the intelligent driving.
[0038] In the embodiment of the utility model, Figure 5-8 As shown: the test drive belt assembly 230 also includes a drive chain 233, the drive chain 233 is engaged with a gear, and the gear is fixed on the output shaft of the motor.
[0039] It should be noted that: the motor and the power wiring method of the motor are both existing technologies, and their detailed structures can be found in existing literature journals. They can also be purchased directly on the market, or parts can be purchased on the market to assemble them, etc.; they are not what the present invention wants to protect, so they will not be elaborated here, nor drawn in the accompanying drawings.
[0040] In the embodiment of the utility model, Figure 5-8 As shown, the driving chain 233 is composed of a plurality of chain links 2331 , and the plurality of chain links 2331 are in one-to-one correspondence with the plurality of unit lifting plates 231 ; a guard plate 232 is arranged outside the driving chain 233 .
[0041] like Figure 6-8As shown: the unit lifting plate 231 includes a receiving plate 2311 and an outer convex plate 2312, the outer convex plate 2312 is movably inserted on the receiving plate 2311, a receiving cavity is provided on the receiving plate 2311 to cooperate with the outer convex plate 2312, the outer convex plate 2312 is movably inserted inside the receiving cavity, a cylinder three is installed inside the receiving cavity, one end of the cylinder three is fixed on the receiving plate 2311, and the other end is fixed on the outer convex plate 2312;
[0042] By adjusting the length of cylinder three, the degree to which the outer convex plate 2312 extends to the outside of the receiving plate 2311, or the degree to which it is received inside the receiving plate 2311, can be adjusted to form an uneven road surface.
[0043] In the embodiment of the utility model, Figure 5 As shown: the intelligent driving detection base 200 also includes a mounting plate 210, which is fixed on the bottom plate 220 in an integrated manner, and a plurality of mounting holes are provided on the mounting plate 210;
[0044] The bottom plate 220 has a gentle slope 250 fixed at one end thereof.
[0045] In the embodiment of the utility model, Figure 1 and Figure 2 As shown: the unit lifting frame 100 includes a support member 110 and a lifting member 120, and the lifting member 120 is installed on the bottom plate 220; the support member 110 is installed on the lifting member 120;
[0046] The support member 110 is used to cooperate with the chain to lift the vehicle and limit it on the intelligent driving detection base 200; the lifting member 120 is used to drive the support member 110 to lift.
[0047] In the embodiment of the utility model, Figure 2 and Figure 3 As shown: the support member 110 includes a support plate 1102, the support plate 1102 is L-shaped, and a drag plate 1105 is movably inserted on the support plate 1102, and the drag plate 1105 is used to lift the vehicle; a cylinder 1103 is fixed on the support plate 1102, and a push plate 1104 is fixed at one end of the cylinder 1103 away from the support plate 1102, and the push plate 1104 is fixed on the drag plate 1105 in an integrated manner;
[0048] The position of the drag plate 1105 inserted on the support plate 1102 is adjusted by extending and retracting the cylinder 1103 to adjust the lateral displacement of the vehicle.
[0049] Furthermore, summarizing the above-mentioned situations, it can be learned that: when the vehicle drives onto the intelligent driving detection base 200, the lifting member 120 is started to drive the drag plate 1105 to be lifted to the bottom of the vehicle; after the vehicle stops crookedly or the front and rear wheels of the vehicle are not in a straight line on the test drive belt assembly 230, the cylinder 1103 on one of the support plates 1102 is used to telescope and adjust the degree of insertion of the drag plate 1105 in the support plate 1102, and the degree of lateral displacement of the vehicle is adjusted, so that the vehicle can be accurately parked on the test drive belt assembly 230, and the requirements for the accuracy of vehicle parking are reduced, and then the vehicle is lifted and limited to the intelligent driving detection base 200 in conjunction with the chain set on the bottom plate 220.
[0050] In the embodiment of the utility model, Figure 2-4 As shown: the lifting member 120 includes a fixing plate 1203, which is mounted on the bottom plate 220 via a connecting plate 1204; a second cylinder 1202 is fixed on the fixing plate 1203, and the second cylinder 1202 is fixed on the supporting plate 1102 at one end away from the fixing plate 1203;
[0051] A guide column 1201 is fixed on the fixing plate 1203 on the side of the second cylinder 1202 , and the guide column 1201 is movably inserted into the support plate 1102 . A reinforcement tube 1101 is fixed on the support plate 1102 to cooperate with the guide column 1201 , and the reinforcement tube 1101 is movably sleeved on the guide column 1201 .
[0052] Furthermore, summarizing the above-mentioned situation, it can be learned that: when the vehicle drives onto the intelligent driving detection base 200, cylinder 2 1202 is started, and cylinder 2 1202 uses the fixed plate 1203 as the rear support point to drive the support plate 1102 and the drag plate 1105 to rise, completing the lifting member 120 to drive the drag plate 1105 to lift it to the bottom of the vehicle.
[0053] For existing inspection equipment, when dealing with some complex road surface inspections with uneven surfaces, the way to simulate uneven roads is mostly to simulate in closed sections or on the roller of a dynamometer. However, the actual test cannot detect the overall reaction of the sensors that sense the surrounding environment of the intelligent driving when the front and rear wheels pass through the same complex road surface. The detection equipment of the intelligent driving for complex ground in the utility model can do the following:
[0054] When the vehicle drives onto the intelligent driving detection base 200, the unit lifting frame 100 is used in conjunction with the chain to lift the vehicle and limit it on the intelligent driving detection base 200, so that the front and rear wheels on one side of the vehicle fall on a test transmission belt assembly 230; after the vehicle is started, multiple unit lifting plates 231 are used in one place or multiple local units to rise or fall to form an uneven road surface. During the rotation of the test transmission belt assembly 230, it passes through the front and rear wheels on one side of the vehicle in turn, so as to simulate the process in which the front and rear wheels of the vehicle pass through the same complex road surface and detect the response of the sensors that perceive the surrounding environment of the intelligent driving.
[0055] The structures, proportions, sizes, etc. illustrated in this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the restrictive conditions for the implementation of the utility model, so they have no technical substantive significance. Any structural modification, change in proportion or adjustment of size, without affecting the effects and purposes that can be achieved by the utility model, should still fall within the scope of the technical content disclosed by the utility model. In the description of the utility model, unless otherwise specified, the meaning of "multiple" is two or more.
[0056] In the description of the present invention, although the embodiments of the present invention have been shown and described, it can be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the attached claims and their equivalents.
Claims
1. A detection device for intelligent driving to cope with complex terrain, characterized in that: It comprises an intelligent driving detection base (200), a plurality of unit lifting frames (100) are installed around the intelligent driving detection base (200), and the unit lifting frames (100) are used to cooperate with a chain to lift a vehicle and limit it on the intelligent driving detection base (200); The intelligent driving detection base (200) comprises a base plate (220), and a unit lifting frame (100) is installed on the base plate (220); two installation grooves (240) are opened on the base plate (220), and the two installation grooves (240) are distributed in parallel; a test transmission belt assembly (230) is installed inside the installation groove (240), and the test transmission belt assembly (230) includes a plurality of unit lifting plates (231), and the plurality of unit lifting plates (231) are distributed in an array; The front and rear wheels on one side of the vehicle fall on a test drive belt assembly (230), and after a plurality of local unit lifting plates (231) rise or fall to form an uneven road surface, the test drive belt assembly (230) passes through the front and rear wheels on one side of the vehicle in sequence during rotation, so as to simulate the front and rear wheels of the vehicle passing through the same complex road surface.
2. The detection device for intelligent driving to cope with complex terrain according to claim 1, characterized in that: The test drive belt assembly (230) further comprises a drive chain (233), wherein the drive chain (233) is meshed with a gear, and the gear is fixed on an output shaft of the motor.
3. The detection device for intelligent driving on complex terrain according to claim 2 is characterized in that: The driving chain (233) is composed of a plurality of chain links (2331), and the plurality of chain links (2331) are in one-to-one correspondence with the plurality of unit lifting plates (231); a guard plate (232) is arranged outside the driving chain (233).
4. The detection device for intelligent driving to cope with complex terrain according to claim 3 is characterized in that: The unit lifting plate (231) comprises a storage plate (2311) and an outer convex plate (2312), the outer convex plate (2312) is movably inserted into the storage plate (2311), a storage cavity is provided on the storage plate (2311) in cooperation with the outer convex plate (2312), the outer convex plate (2312) is movably inserted into the storage cavity, a cylinder three is installed inside the storage cavity, one end of the cylinder three is fixed to the storage plate (2311), and the other end is fixed to the outer convex plate (2312); By adjusting the length of the cylinder three, the extent to which the outer convex plate (2312) extends outside the receiving plate (2311) or is received inside the receiving plate (2311) can be adjusted to form an uneven road surface.
5. The detection device for intelligent driving on complex terrain according to claim 1, characterized in that: The intelligent driving detection base (200) further comprises a mounting plate (210), wherein the mounting plate (210) is fixed integrally to the base plate (220), and a plurality of mounting holes are provided on the mounting plate (210); A gentle slope (250) is fixed at the end of one end of the bottom plate (220).
6. The detection device for intelligent driving on complex terrain according to claim 1, characterized in that: The unit lifting frame (100) comprises a support member (110) and a lifting member (120), wherein the lifting member (120) is mounted on a bottom plate (220); the support member (110) is mounted on the lifting member (120); The support member (110) is used to cooperate with the chain to lift the vehicle and limit it on the intelligent driving detection base (200); and the lifting member (120) is used to drive the support member (110) to lift.
7. The detection device for intelligent driving on complex terrain according to claim 6 is characterized in that: The support member (110) comprises a support plate (1102), the support plate (1102) is L-shaped, a drag plate (1105) is movably inserted into the support plate (1102), and the drag plate (1105) is used to lift the vehicle; a cylinder 1 (1103) is fixed to the support plate (1102), a push plate (1104) is fixed to the end of the cylinder 1 (1103) away from the support plate (1102), and the push plate (1104) is fixed to the drag plate (1105) in an integral manner; The position of the drag plate (1105) inserted on the support plate (1102) is adjusted by extending and retracting the cylinder 1 (1103) to adjust the lateral displacement of the vehicle.
8. The detection device for intelligent driving on complex terrain according to claim 7, characterized in that: The lifting member (120) comprises a fixing plate (1203), and the fixing plate (1203) is mounted on the bottom plate (220) via a connecting plate (1204); a second cylinder (1202) is fixed on the fixing plate (1203), and the second cylinder (1202) is fixed on the supporting plate (1102) at one end away from the fixing plate (1203); A guide column (1201) is fixed on the fixing plate (1203) on the side of the second cylinder (1202), and the guide column (1201) is movably inserted into the support plate (1102). A reinforcement tube (1101) is fixed on the support plate (1102) to cooperate with the guide column (1201), and the reinforcement tube (1101) is movably sleeved on the guide column (1201).