A new lifting vehicle

Abstract

The utility model relates to a new lifting car belongs to the technical field of auxiliary lifting equipment of motor vehicle maintenance, especially to a new lifting car, the utility model provides a new lifting car good use effect, can flexible removal, the utility model discloses a base (17), the base (17) lower end is provided with trundle, its characterized in that the base (17) is provided with the oil cylinder (10), and the oil cylinder (10) telescopic link upper end is connected with the upper cover spare (1) lower end, and the electric energy port of battery (51) is connected with the power port of direct current motor pump (44) through switch (30), and the electric energy port of battery (51) is connected with socket (28) respectively, battery power meter (32), and the power output port of direct current motor pump (44) is connected with the power input port of oil cylinder (10).

Description

Technical Field

[0001] This utility model belongs to the technical field of auxiliary lifting equipment for motor vehicle maintenance, and particularly relates to a new type of lifting vehicle. Background Technology

[0002] Currently, there are many types of mobile lifts on the market. They generally use AC motors and scissor lift structures, which are complex in structure, have high manufacturing costs, and the AC power cables limit their range of use, making them unable to move flexibly and occupying a large area. Utility Model Content

[0003] This utility model addresses the aforementioned problems by providing a new type of lifting vehicle that offers good performance and flexible mobility.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: the present invention includes a base (17), and casters are provided at the lower end of the base (17); the feature is that an oil cylinder (10) is provided on the base (17), and the upper end of the telescopic rod of the oil cylinder (10) is connected to the lower end of the upper cover component (1);

[0005] The power port of the battery (51) is connected to the power port of the DC motor pump (44) via a switch (30);

[0006] The power terminals of the battery (51) are connected to the socket (28) and the battery power meter (32) respectively;

[0007] The power output port of the DC motor pump (44) is connected to the power input port of the oil cylinder (10).

[0008] As a preferred embodiment, the switch (30) of this invention is a high-current rotary switch.

[0009] As another preferred embodiment, the present invention has four casters, which are set at the four corners of the lower end of the base (17), two of which are fixed casters (19) and the other two are movable casters (23) with brake function.

[0010] As another preferred embodiment, the base (17) of this invention is provided with a push-pull rod (26) on the front side.

[0011] As another preferred option, the hydraulic cylinder (10) of this utility model is a three-stage hydraulic cylinder.

[0012] As another preferred embodiment, the oil cylinder (10) of this utility model is set inside the column (12), and the lower end of the oil cylinder (10) is provided with an oil cylinder pressure plate (50). The lower end of the column (12) and the oil cylinder pressure plate (50) are fixed to the base (17) by bolts (22) and nuts (13).

[0013] As another preferred embodiment, the column (12) of this utility model is provided with a guide rod (11) on one side. The lower end of the guide rod (11) is installed in the round hole on the side of the cylinder pressure plate (50) by a screw (15). The upper end of the guide rod (11) is fitted into the round hole on the top side of the column (12). The axis of the guide rod (11) is parallel to the axis of the cylinder (10).

[0014] As another preferred option, the guide rod (11) of this utility model adopts a three-stage guide rod.

[0015] As another preferred embodiment, the DC motor pump (44) of this utility model is fixed to the column (12) by bolts (49); the battery (51) is placed on the battery tray (46), and the battery tray (46) is fixed to the DC motor pump (44) by pads (45) and screws (47); the battery fixing plate (48) is fixed to the side of the battery tray (46) by screws (38); the battery tray (46) has an upper through-hole for the DC motor pump (44) in the middle, and the battery (51) is located on the side of the DC motor pump (44).

[0016] As another preferred embodiment, the DC motor pump (44) of this utility model is provided with a pump cover (40) on the upper part, and the pump cover (40) is fixed to the column (12) by screws (38); the battery power meter (32), switch (30), socket (28), and pump cover top cover (35) are fixed to the pump cover (40) by their respective screws; the battery (51) is set inside the pump cover (40).

[0017] As another preferred embodiment, the upper cover component (1) of this utility model is provided with a rivet nut (60) for fixing the support fixture (70).

[0018] As another preferred embodiment, the support fixture (70) of this utility model is provided with a strip groove (61) corresponding to the rivet nut (60), and the bolt (62) passes through the strip groove (61) and is screwed into the rivet nut (60).

[0019] Secondly, the bracket component (5) of this utility model is installed on the top of the oil cylinder (10) through the central round hole, and the bracket component (5) is fixed to the top of the oil cylinder (10) by a large flat washer (4) and a round nut (3);

[0020] The top screw of the guide rod (11) passes through the elongated hole slightly outward in the middle of the bracket component (5). With the help of the nut (8) and flat washer (7) below the bracket component (5) and the flat washer and nut (2) above the bracket component (5), the guide rod (11) is connected to the bracket component (5).

[0021] The tray assembly (6) is placed on the cylindrical protrusions at the four corners of the bracket component (5). Figure 7The cylindrical protrusion of the threaded sleeve (5-5-2) is inserted into the circular hole below the tray assembly (6), thereby limiting the tray assembly (6) to prevent it from moving.

[0022] Four limiting sleeves (1-1) are welded at the four corners below the top cover component (1). The inner diameter of the limiting sleeve (1-1) is larger than the maximum diameter of the top of the tray assembly (6). The tray assembly (6) is placed inside the limiting sleeve (1-1), and the limiting sleeve (1-1) restricts the tray assembly (6) so that it will not slip.

[0023] In addition, the bracket component (5) of this utility model includes a pull-out assembly (5-2) and an adjusting rod component (5-11). The pull-out assembly (5-2) is inserted into the transverse square tube (5-1). A stop block E is welded to the end of the pull-out assembly (5-2). Limit screws (5-9), washers (5-4), and locking nuts (5-10) are installed in the threaded holes at C2 on one side of the transverse square tube (5-1) and D2 on the other side of the transverse square tube (5-1).

[0024] The limiting screw (5-9) at C2 cooperates with the stop block E to prevent the pull-out assembly (5-2) from being pulled out of the horizontal square tube (5-1) during use; the limiting screw (5-9) at D2 cooperates with the stop block E to prevent the pull-out assembly (5-2) from being excessively inserted into the horizontal square tube (5-1) to avoid collisions.

[0025] The support plate component (5-5) is inserted into the longitudinal square tube (5-3) at the end of the pull-out assembly (5-2). The baffle (5-6) is fixed to the inner side of the end of the longitudinal square tube (5-3) by bolts (5-8). The baffle (5-6) cooperates with the stop block F at the inner end of the support plate component (5-5) to prevent the support plate component (5-5) from coming out of the longitudinal square tube (5-3).

[0026] The outer end of the support plate component (5-5) is fitted with a bolt (5-5-6), and a lock nut (5-5-4) is fitted on the bolt (5-5-6). The lock nut (5-5-4) has a threaded hole in the diameter direction and is fitted with a screw (5-5-5). The screw (5-5-5) fixes the lock nut (5-5-4) to the bolt (5-5-6).

[0027] The small end of the rotating bolt (5-5-6) passes through the support plate component (5-5), the threaded sleeve (5-5-2) and the washer (5-5-3) are installed on the small end of the bolt (5-5-6), the washer (5-5-3) rests on the step of the thread on the small end of the bolt (5-5-6), and the lower surface of the washer (5-5-3) is close to the upper surface of the support plate component (5-5);

[0028] The adjusting rod assembly (5-11) is a three-bar linkage mechanism. The main connecting rod (5-11-1) has a round hole in the middle, which is installed on the C1 sleeve between the two transverse square tubes (5-1). The two ends of the main connecting rod (5-11-1) are connected to one end of the connecting rod (5-11-3a) by screws (5-11-2) and self-locking nuts (5-11-5a). The other end of the connecting rod (5-11-3a) is connected to the longitudinal square tube (5-3) by nuts (5-11-6), self-locking nuts (5-11-5b), and screws (5-11-7).

[0029] The beneficial effects of this utility model.

[0030] This innovative movable column lift replaces the AC motor pump with a DC motor pump powered by a rechargeable battery. The DC motor pump outputs pressurized hydraulic oil to drive a hydraulic cylinder to lift the vehicle engine or new energy vehicle battery (the vehicle engine or new energy vehicle battery is supported by a support attachment). Figure 8 The device is placed on the upper cover component (1) and lifted for maintenance. This utility model solves the problem of the limitation of power cable length during the use of the mobile lifting vehicle, expands the application range of the lifting vehicle, and can be moved flexibly; it also has a simple structure, is easy to manufacture, occupies a small area, and is suitable for indoor and outdoor use.

[0031] This invention replaces the conventional scissor boom structure of a lifting vehicle with a simple column-type direct-drive structure, which greatly reduces the driving pressure requirements of the hydraulic cylinder and helps extend the service life of the hydraulic system.

[0032] The charger (34) is connected to the battery (51) via a socket (28) to charge the battery (51). The battery power (51) is displayed via a battery power meter (32). After charging is complete, the charger (34) is unplugged from the socket (28). The switch (30) controls the connection between the battery (51) and the power port of the DC motor pump (44), controls the switching of the working state of the whole machine, and also has a switch (30) for timely opening and closing control. Attached Figure Description

[0033] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. The scope of protection of the present invention is not limited to the following description.

[0034] Figure 1 This is an overall schematic diagram of the lifting vehicle of this utility model.

[0035] Figure 2 This is a schematic diagram of the structural composition of the lifting vehicle of this utility model.

[0036] Figure 3 This is a schematic diagram of the top cover component of this utility model.

[0037] Figure 4 This is a schematic diagram of the structural composition of the bracket component of this utility model.

[0038] Figure 5 This is a schematic diagram of the bottom structure of the bracket component of this utility model.

[0039] Figure 6 This is a schematic diagram of the structure of the adjusting rod component of this utility model.

[0040] Figure 7 This is a schematic diagram of the components of the support plate of this utility model.

[0041] Figure 8 This is a schematic diagram of the supporting fixture structure of this utility model.

[0042] Figure 9 This is a schematic diagram showing the change in the spacing between the longitudinal square tubes (5-3) on both sides of this utility model. Detailed Implementation

[0043] As shown in the figure, this utility model includes a base (17), and casters are provided at the lower end of the base (17);

[0044] A hydraulic cylinder (10) is installed on the base (17), and the upper end of the extension rod of the hydraulic cylinder (10) is connected to the lower end of the cover component (1);

[0045] The power port of the battery (51) is connected to the power port of the DC motor pump (44) via a switch (30);

[0046] The power terminals of the battery (51) are connected to the socket (28) and the battery power meter (32) respectively;

[0047] The power output port of the DC motor pump (44) is connected to the power input port of the oil cylinder (10).

[0048] The switch (30) is a high-current rotary switch.

[0049] There are four casters, located at the four corners of the lower end of the base (17), two of which are fixed casters (19) and the other two are movable casters (23) with brake function.

[0050] A push-pull rod (26) is provided on the front side of the base (17).

[0051] The base (17) is equipped with two fixed casters (19), two movable casters (23) with brakes, and a push-pull rod (26) to facilitate the movement and repositioning of the lift. When using the lift, the position of the lift can be locked by pressing the brake on the movable caster (23).

[0052] The hydraulic cylinder (10) is a three-stage hydraulic cylinder.

[0053] The cylinder (10) is installed inside the column (12), and a cylinder pressure plate (50) is provided at the lower end of the cylinder (10). The lower end of the column (12) and the cylinder pressure plate (50) are fixed to the base (17) by bolts (22) and nuts (13).

[0054] A guide rod (11) is provided on one side of the column (12). The lower end of the guide rod (11) is installed in the round hole on the side of the cylinder pressure plate (50) by screws (15). The upper end of the guide rod (11) is fitted into the round hole on the top side of the column (12). The axis of the guide rod (11) is parallel to the axis of the cylinder (10).

[0055] The guide rod (11) is a three-stage guide rod.

[0056] The DC motor pump (44) is fixed to the column (12) by bolts (49); the battery (51) is placed on the battery tray (46), which is fixed to the DC motor pump (44) by a pad (45) and screws (47); the battery fixing plate (48) is fixed to the side of the battery tray (46) by screws (38); the battery tray (46) has an opening in the middle for the DC motor pump (44) to pass through, and the battery (51) is located on the side of the DC motor pump (44). Two batteries (51) can be provided, and the two batteries (51) are placed on both sides of the upper part of the DC motor pump (44) through the battery tray (46), which has a compact structure and small size.

[0057] The DC motor pump (44) is provided with a pump cover (40) on the upper part, and the pump cover (40) is fixed to the column (12) by screws (38); the battery power meter (32), switch (30), socket (28), and pump cover top cover (35) are fixed to the pump cover (40) by their respective screws; the battery (51) is set inside the pump cover (40).

[0058] The bracket component (5) is installed on the top of the oil cylinder (10) through the central round hole. The bracket component (5) is fixed to the top of the oil cylinder (10) with a large flat washer (4) and a round nut (3).

[0059] The top screw of the guide rod (11) passes through the elongated hole slightly outward in the middle of the bracket component (5). With the help of the nut (8) below the bracket component (5), the flat washer (7) and the flat washer (same as the flat washer (7)) above the bracket component (5), and the nut (2), the guide rod (11) is connected to the bracket component (5).

[0060] The tray assembly (6) is placed on the cylindrical protrusions at the four corners of the bracket component (5). Figure 7 The cylindrical protrusion of the threaded sleeve (5-5-2) is inserted into the circular hole below the tray assembly (6), thereby limiting the tray assembly (6) to prevent it from moving.

[0061] Four limiting sleeves (1-1) are welded at the four corners below the top cover component (1). The inner diameter of the limiting sleeve (1-1) is larger than the maximum diameter of the top of the tray assembly (6). The tray assembly (6) is placed inside the limiting sleeve (1-1), and the limiting sleeve (1-1) restricts the tray assembly (6) so that it will not slip.

[0062] The bracket component (5) includes a pull-out assembly (5-2) and an adjusting rod component (5-11). The pull-out assembly (5-2) is inserted into the transverse square tube (5-1). A stop block E is welded to the end of the pull-out assembly (5-2). Limit screws (5-9), washers (5-4), and lock nuts (5-10) are installed in the threaded holes at C2 on one side of the transverse square tube (5-1) and D2 on the other side of the transverse square tube (5-1).

[0063] The limiting screw (5-9) at C2 cooperates with the stop block E to prevent the pull-out assembly (5-2) from being pulled out of the horizontal square tube (5-1) during use; the limiting screw (5-9) at D2 cooperates with the stop block E to prevent the pull-out assembly (5-2) from being excessively inserted into the horizontal square tube (5-1) to avoid collisions.

[0064] The support plate component (5-5) is inserted into the longitudinal square tube (5-3) at the end of the pull-out assembly (5-2). The baffle (5-6) is fixed to the inner side of the end of the longitudinal square tube (5-3) by bolts (5-8). The baffle (5-6) cooperates with the stop block F at the inner end of the support plate component (5-5) to prevent the support plate component (5-5) from coming out of the longitudinal square tube (5-3).

[0065] The outer end of the support plate component (5-5) is fitted with a bolt (5-5-6), and a lock nut (5-5-4) is fitted on the bolt (5-5-6). The lock nut (5-5-4) has a threaded hole in the diameter direction and is fitted with a screw (5-5-5). The screw (5-5-5) fixes the lock nut (5-5-4) to the bolt (5-5-6).

[0066] The small end of the rotating bolt (5-5-6) passes through the support plate component (5-5), the threaded sleeve (5-5-2) and the washer (5-5-3) are installed on the small end of the bolt (5-5-6), the washer (5-5-3) rests on the step of the thread on the small end of the bolt (5-5-6), and the lower surface of the washer (5-5-3) is close to the upper surface of the support plate component (5-5);

[0067] The adjusting rod assembly (5-11) is a three-bar linkage mechanism. The main connecting rod (5-11-1) has a round hole in the middle, which is installed on the C1 sleeve between the two transverse square tubes (5-1). The two ends of the main connecting rod (5-11-1) are connected to one end of the connecting rod (5-11-3a) by screws (5-11-2) and self-locking nuts (5-11-5a). The other end of the connecting rod (5-11-3a) is connected to the longitudinal square tube (5-3) by nuts (5-11-6), self-locking nuts (5-11-5b), and screws (5-11-7).

[0068] The screw (5-5-5) secures the lock nut (5-5-4) to the bolt (5-5-6). Rotate the bolt (5-5-6) so that its small end passes fully through the support plate assembly (5-5-1). The threaded sleeve (5-5-2) and washer (5-5-3) are fitted onto the small end of the bolt (5-5-6), with the washer (5-5-3) resting fully against the step of the thread on the small end of the bolt (5-5-6). Rotate the bolt (5-5-6) so that the lower surface of the washer (5-5-3) is flush against the upper surface of the support plate assembly (5-5-1), then tighten the lock nut (5-5-4) and the screw (5-5-5).

[0069] The main connecting rod (5-11-1) has a round hole in the middle. The round hole is installed on the C1 sleeve between the two horizontal square tubes (5-1) and can rotate around the sleeve C1.

[0070] By adjusting the vertical position of the self-locking nut (5-11-5a), the main connecting rod (5-11-1) and connecting rod (5-11-3a) can rotate freely at the connection point. Similarly, at the other end of the connecting rod (5-11-3a), adjusting the vertical position of the self-locking nut (5-11-5b) allows the screw (5-11-7) to rotate freely in the corresponding hole of the connecting rod (5-11-3a), without excessive back-and-forth or left-and-right swaying. The nut (5-11-6) is used to lock the screw (5-11-7) in place. Figure 5 Points A1 and B1 in the diagram are fixed.

[0071] The adjusting rod assembly (5-11) is connected to the threaded holes A1 and B1 on the longitudinal square tube (5-3) via screws (5-11-7), forming a synchronous opening and closing mechanism for the two-sided pull-out assemblies (5-2). When one of the pull-out assemblies (5-2) is pushed or pulled, the other automatically extends or retracts.

[0072] This utility model uses components such as a pull-out assembly (5-2) and an adjusting rod component (5-11) to change the spacing between the longitudinal square tubes (5-3) on both sides. Figure 9As shown, when the left longitudinal square tube (5-3) is dragged to the left, the left connecting rod (5-11-3a) connected to it moves to the left, causing the main connecting rod (5-11-1) to rotate counterclockwise around the center, thereby causing the right connecting rod (5-11-3a) connected to the lower end of the main connecting rod (5-11-1) to move to the right. Under the action of the right connecting rod (5-11-3a), the right longitudinal square tube (5-3) moves to the right, achieving the function of synchronous extension and retraction.

[0073] The spacing between the longitudinal square tubes (5-3) on both sides is adjusted to accommodate top cover components (1) of different sizes. For example, to replace a larger top cover component (1), first remove the original top cover component (1), then rotate the pull-out assembly (5-2), (5-11) to increase the spacing between (5-3), and then install the larger top cover component (1). Place the tray assembly (6) inside the limiting sleeve (1-1) of the larger top cover component (1). The purpose of replacing the top cover component (1) is to facilitate the use of different special support attachments. Figure 8 When used as a mounting base, it allows for the disassembly and installation of different car engines.

[0074] The upper cover component (1) is provided with a rivet nut (60) for fixing the support fixture (70). The rivet nut (60) is riveted to the upper cover component (1).

[0075] The support fixture (70) is provided with a slot (61) corresponding to the rivet nut (60), and the bolt (62) passes through the slot (61) and is screwed into the rivet nut (60).

[0076] Support attachments (70) include tray-shaped support attachments, support column-shaped support attachments, etc., used to prevent vehicle engines or new energy vehicle batteries from falling off.

[0077] This utility model is used in conjunction with a vehicle lift. The vehicle lift first lifts the vehicle, and then pushes this utility model to the corresponding position of the engine or new energy vehicle battery under the vehicle. The hydraulic cylinder (10) is controlled to raise the upper cover component (1) to approach the engine or new energy vehicle battery. The engine or new energy vehicle battery is removed and placed on the upper cover component (1), and the upper cover component (1) is controlled to descend.

[0078] It is understood that the above specific description of this utility model is only used to illustrate this utility model and is not limited to the technical solutions described in the embodiments of this utility model. Those skilled in the art should understand that modifications or equivalent substitutions can still be made to this utility model to achieve the same technical effect; as long as the use needs are met, they are all within the protection scope of this utility model.

Claims

1. A novel lifting vehicle, comprising a base (17), wherein casters are provided at the lower end of the base (17); characterized in that A hydraulic cylinder (10) is installed on the base (17), and the upper end of the extension rod of the hydraulic cylinder (10) is connected to the lower end of the cover component (1); The power port of the battery (51) is connected to the power port of the DC motor pump (44) via a switch (30); The power terminals of the battery (51) are connected to the socket (28) and the battery power meter (32) respectively; The power output port of the DC motor pump (44) is connected to the power input port of the oil cylinder (10).

2. The novel lifting vehicle according to claim 1, characterized in that... There are four casters, located at the four corners of the lower end of the base (17), two of which are fixed casters (19) and the other two are movable casters (23) with brake function.

3. The novel lifting vehicle according to claim 1, characterized in that... A push-pull rod (26) is provided on the front side of the base (17).

4. The novel lifting vehicle according to claim 1, characterized in that... The cylinder (10) is installed inside the column (12), and a cylinder pressure plate (50) is provided at the lower end of the cylinder (10). The lower end of the column (12) and the cylinder pressure plate (50) are fixed to the base (17) by bolts (22) and nuts (13).

5. A novel lifting vehicle according to claim 4, characterized in that... A guide rod (11) is provided on one side of the column (12). The lower end of the guide rod (11) is installed in the round hole on the side of the cylinder pressure plate (50) by screws (15). The upper end of the guide rod (11) is fitted into the round hole on the top side of the column (12). The axis of the guide rod (11) is parallel to the axis of the cylinder (10).

6. The novel lifting vehicle according to claim 1, characterized in that... The DC motor pump (44) is fixed to the column (12) by bolts (49); the battery (51) is placed on the battery tray (46), and the battery tray (46) is fixed to the DC motor pump (44) by pads (45) and screws (47); the battery fixing plate (48) is fixed to the side of the battery tray (46) by screws (38); the battery tray (46) has an opening in the middle for the upper part of the DC motor pump (44), and the battery (51) is located on the side of the DC motor pump (44).

7. The novel lifting vehicle according to claim 1, characterized in that... The DC motor pump (44) is provided with a pump cover (40) on the upper part, and the pump cover (40) is fixed to the column (12) by screws (38); the battery power meter (32), switch (30), socket (28), and pump cover top cover (35) are fixed to the pump cover (40) by their respective screws; the battery (51) is set inside the pump cover (40).

8. The novel lifting vehicle according to claim 1, characterized in that... The upper cover component (1) is provided with a rivet nut (60) for fixing the support attachment (70); the support attachment (70) is provided with a strip groove (61) corresponding to the rivet nut (60), and the bolt (62) passes through the strip groove (61) and is screwed into the rivet nut (60).

9. A novel lifting vehicle according to claim 1, characterized in that... The bracket component (5) is installed on the top of the oil cylinder (10) through the central round hole. The bracket component (5) is fixed to the top of the oil cylinder (10) with a large flat washer (4) and a round nut (3). The top screw of the guide rod (11) passes through the elongated hole slightly outward in the middle of the bracket component (5). With the help of the nut (8) and flat washer (7) below the bracket component (5) and the flat washer and nut (2) above the bracket component (5), the guide rod (11) is connected to the bracket component (5). The tray assembly (6) is placed on the cylindrical protrusions at the four corners of the bracket component (5). The cylindrical protrusions are inserted into the circular holes below the tray assembly (6), thereby limiting the tray assembly (6) to prevent it from moving. Four limiting sleeves (1-1) are welded at the four corners below the top cover component (1). The inner diameter of the limiting sleeve (1-1) is larger than the maximum diameter of the top of the tray assembly (6). The tray assembly (6) is placed inside the limiting sleeve (1-1), and the limiting sleeve (1-1) restricts the tray assembly (6) so that it will not slip.

10. A novel lifting vehicle according to claim 9, characterized in that... The bracket component (5) includes a pull-out assembly (5-2) and an adjusting rod component (5-11). The pull-out assembly (5-2) is inserted into the transverse square tube (5-1). A stop block E is welded to the end of the pull-out assembly (5-2). Limit screws (5-9), washers (5-4), and lock nuts (5-10) are installed in the threaded holes at C2 on one side of the transverse square tube (5-1) and D2 on the other side of the transverse square tube (5-1). The limiting screw (5-9) at C2 cooperates with the stop block E to prevent the pull-out assembly (5-2) from being pulled out of the horizontal square tube (5-1) during use; the limiting screw (5-9) at D2 cooperates with the stop block E to prevent the pull-out assembly (5-2) from being excessively inserted into the horizontal square tube (5-1) to avoid collisions. The support plate component (5-5) is inserted into the longitudinal square tube (5-3) at the end of the pull-out assembly (5-2). The baffle (5-6) is fixed to the inner side of the end of the longitudinal square tube (5-3) by bolts (5-8). The baffle (5-6) cooperates with the stop block F at the inner end of the support plate component (5-5) to prevent the support plate component (5-5) from coming out of the longitudinal square tube (5-3). The outer end of the support plate component (5-5) is fitted with a bolt (5-5-6), and a lock nut (5-5-4) is fitted on the bolt (5-5-6). The lock nut (5-5-4) has a threaded hole in the diameter direction and is fitted with a screw (5-5-5). The screw (5-5-5) fixes the lock nut (5-5-4) to the bolt (5-5-6). The small end of the rotating bolt (5-5-6) passes through the support plate component (5-5), the threaded sleeve (5-5-2) and the washer (5-5-3) are installed on the small end of the bolt (5-5-6), the washer (5-5-3) rests on the step of the thread on the small end of the bolt (5-5-6), and the lower surface of the washer (5-5-3) is close to the upper surface of the support plate component (5-5); The adjusting rod assembly (5-11) is a three-bar linkage mechanism. The main connecting rod (5-11-1) has a round hole in the middle, which is installed on the C1 sleeve between the two transverse square tubes (5-1). The two ends of the main connecting rod (5-11-1) are connected to one end of the connecting rod (5-11-3a) by screws (5-11-2) and self-locking nuts (5-11-5a). The other end of the connecting rod (5-11-3a) is connected to the longitudinal square tube (5-3) by nuts (5-11-6), self-locking nuts (5-11-5b), and screws (5-11-7).

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