Lifting structure of numerical control butt joint vehicle

Abstract

The invention belongs to the technical field of numerical control butt joint vehicles, and discloses a lifting structure of a numerical control butt joint vehicle, which comprises a vertical bracket vehicle and a satellite assembly mounted on the vertical bracket vehicle. Through cooperation of the supporting assembly, the satellite assembly and other structures, the hydraulic cylinder drives the structure on the hydraulic cylinder to ascend, finally, the first corrugated pipe can be tightly attached to the periphery of the satellite assembly, and due to the compressible flexible property of the first corrugated pipe, if the satellite assembly is in an inclined state, a rubber plate can also incline, and the satellite assembly is prevented from being damaged. The inclination degree of the satellite assembly can be further determined by reading the numerical values of the scale grooves in the two measuring plates, and workers are helped to find problems in time, if the satellite assembly is not inclined, the rubber plate can also play a role in supporting the satellite assembly, so that the situation that when the satellite assembly is located on the vertical support vehicle, the satellite assembly is not inclined is avoided, and the satellite assembly is not inclined. And the gravity center is unstable, so that the satellite assembly is separated from the vertical bracket vehicle or a butt joint part is deformed and damaged.

Description

Technical Field

[0001] The invention belongs to the technical field of numerical control docking vehicles, in particular to a lifting structure of a numerical control docking vehicle. Background Art

[0002] The large platform assembly system is mainly responsible for the assembly of satellites and the testing completed at the assembly station. Among them, the vertical support vehicle for the whole satellite is a key equipment in the assembly system. The main function of the vertical support vehicle is to provide stable support for the large satellite platform during assembly. This equipment vehicle is also called a CNC docking vehicle.

[0003] In the process of lifting and lowering the satellite by the bracket vehicle, since it generally fixes one side of the satellite, this will cause the satellite to be transported in a horizontal state and moved or stationary by the bracket vehicle. The center of gravity of the satellite is unstable, causing the satellite to tilt and become partially damaged. For this reason, we provide a lifting structure for a CNC docking vehicle. Summary of the invention

[0004] In order to solve the problems raised in the above-mentioned background technology, the present invention provides a lifting structure of a CNC docking vehicle, which solves the problem that the existing support vehicle can generally only support and fix one side of the satellite, thereby causing the center of gravity of the support vehicle to be unstable during the process of moving the satellite, thereby causing partial damage to the satellite.

[0005] To achieve the above-mentioned object, the present invention provides the following technical solutions: A lifting structure of a numerically controlled docking vehicle, comprising a vertical support vehicle and a satellite assembly installed on the vertical support vehicle, and further comprising;

[0006] A support assembly disposed on a vertical support vehicle;

[0007] The support assembly includes a hydraulic box fixedly mounted on the bottom of the vertical support vehicle, the interior of the hydraulic box is filled with hydraulic oil, a first chamber is arranged at the upper end of the interior of the hydraulic box, the first chamber is communicated with the interior of the hydraulic box, a plurality of hydraulic cylinders are arranged on the top of the hydraulic box, the hydraulic cylinders are communicated with the first chamber, the top of the hydraulic cylinders is connected to a bellows 1 through an integration plate, a rubber plate is arranged on the top of the bellows 1, and a measuring plate is arranged on both sides of the integration plate;

[0008] The support assembly also includes a motor 1 fixedly mounted on the bottom of the vertical support vehicle, the output shaft of the motor 1 is transmission-connected with a threaded shaft 1, and the outer peripheral thread sleeve of the threaded shaft 1 is provided with a guide plate;

[0009] The rubber plate is arc-shaped and is located directly below the satellite assembly. The outer side of the measuring plate is provided with scale grooves and is closely attached to both sides of the rubber plate.

[0010] Four mutually symmetrical lifting components connected to the inside of the hydraulic box;

[0011] Buffer components fixed on both sides of the vertical support vehicle.

[0012] Preferably, the support assembly also includes a spring 1 fixed inside the hydraulic box, the outer side of the spring 1 is elastically connected to a baffle 1, and a second chamber is respectively provided at both ends inside the hydraulic box, and the baffle 1 is used to block the connection between the hydraulic box and the second chamber.

[0013] Preferably, the lifting assembly includes a transferor and a positioning cylinder arranged at the bottom of the vertical support vehicle, the transferor is communicated with the interior of the second chamber, the transferor is communicated with the interior of the positioning cylinder, the interior of the positioning cylinder is sleeved with an extension cylinder, the interior of the extension cylinder is elastically connected with a baffle three through a spring two, the interior of the positioning cylinder is divided into two independent upper and lower chambers by a partition, a plurality of slots are opened on the partition, and a protrusion matching the slot is arranged on the top of the baffle three.

[0014] Preferably, the lifting assembly also includes a second motor fixedly mounted inside the extension tube, the output shaft of the second motor is transmission-connected with a second threaded shaft, the outer periphery of the second threaded shaft is sleeved with a second baffle, and the second baffle is elastically connected to a third baffle via a tension spring.

[0015] Preferably, the tension spring pulls the baffle plate three to always separate from the partition plate, and the protrusion on the baffle plate three does not block the notch on the partition plate.

[0016] Preferably, the buffer assembly comprises a rubber sleeve and a second bellows which are arranged on the outside of the vertical support vehicle, and the rubber sleeve is connected to the inside of the second bellows through an air pipe.

[0017] Preferably, the lifting assembly further comprises a guide rod fixedly mounted on the extension tube, the guide rod passes through the bottom of the second bellows and is connected with the top of the second bellows, and the rubber sleeve and the top of the second bellows are both filled with hydraulic oil.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] The present invention arranges the coordination of structures such as a support assembly and a satellite assembly, and the output shaft of a motor drives the guide plate to move through a threaded shaft, and compresses the hydraulic oil inside the hydraulic box into the first chamber, and the hydraulic cylinder drives the structure thereon to rise, and finally the bellows will be tightly attached to the outer periphery of the satellite assembly, and the compressible soft nature of the bellows makes it possible for the rubber plate to be tilted if the satellite assembly is in a tilted state, and by reading the values ​​of the scale grooves on the two measuring plates, the degree of tilt of the satellite assembly can be further determined, and the staff can be helped to find problems in time. If the satellite assembly is not tilted, the rubber plate can also support the satellite assembly, thereby avoiding the situation where the satellite assembly is on the vertical support vehicle due to an unstable center of gravity, causing the satellite assembly to detach from the vertical support vehicle or deformation and damage to the docking part.

[0020] The present invention cooperates with structures such as a supporting assembly and a lifting assembly. During the movement of the guide plate, since spring 1 always pushes baffle 1 to block the connection between the inside of the hydraulic box and the second chamber, the hydraulic oil will preferentially enter the first chamber and drive the rubber plate thereon to perform supporting work. When the supporting work is completed, the hydraulic oil pushes baffle 1 to enter the second chamber, thereby forcing the lifting assembly to perform supporting work. Furthermore, it can prevent the vibration generated by the lifting assembly during the lifting work from shaking the satellite assembly, thereby causing damage to it.

[0021] The present invention cooperates with structures such as a vertical support vehicle and a lifting component. When the spirit level inside the vertical support vehicle detects that the vertical support vehicle is not in a horizontal state after being supported by the lifting component, a controller inside the vertical support vehicle activates one of the motors 2 to start, and the output shaft of the motor 2 drives the baffle 2 and the tension spring to rise through the threaded shaft 2. Further, the tension applied by the tension spring to the baffle 3 is weakened, so that the baffle 3 is pushed up by the spring 2, and the protrusion blocks the notch on the partition. The hydraulic oil will not be pushed back to the inside of the second chamber by the baffle 2, and the remaining three extension cylinders will not extend to the outside. This part of the hydraulic oil is always located in the lower end chamber of the positioning cylinder and the inside of the extension cylinder, thereby further extending this part of the extension cylinder, and the motor 2 will not be stopped until the spirit level detects that the vertical support vehicle is in a horizontal state, thereby further preventing the vertical support vehicle from deviating during the docking work.

[0022] The present invention cooperates with structures such as a lifting assembly and a buffer assembly. When the extension tube is extended, it compresses the bellows 2 through the guide rod, so that the hydraulic oil inside it enters the rubber sleeve through the air pipe. Furthermore, the rubber sleeve will be in an expanded state and can prevent external impact forces from hitting the vertical support vehicle and causing shaking, thereby ensuring the stability of the device during operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic diagram of the appearance structure of the present invention;

[0024] Figure 2 It is a schematic diagram of the coordination between the vertical support vehicle and the support assembly structure of the present invention;

[0025] Figure 3 It is a schematic diagram of the structural coordination between the support assembly and the lifting assembly of the present invention;

[0026] Figure 4 This is a schematic diagram of the exploded view of the support assembly structure of the present invention;

[0027] Figure 5 It is a cross-sectional schematic diagram of the internal structure of the hydraulic box of the present invention;

[0028] Figure 6 This is a schematic diagram of the structural coordination between the rubber plate and the satellite assembly of the present invention;

[0029] Figure 7 This is a schematic diagram of the internal structure of the positioning tube of the present invention;

[0030] Figure 8 It is a schematic diagram of the structural coordination between the lifting assembly and the buffer assembly of the present invention.

[0031] In the figure: 1. vertical support vehicle; 2. satellite assembly; 3. support assembly; 31. hydraulic box; 32. hydraulic cylinder; 33. integration plate; 34. bellows one; 35. rubber plate; 36. measuring plate; 37. motor one; 38. threaded shaft one; 39. guide plate; 30. baffle one; 301. spring one; 302. first chamber; 303. second chamber; 4. lifting assembly; 41. transfer device; 42. positioning cylinder; 43. extension cylinder; 44. motor two; 45. threaded shaft two; 46. baffle two; 47. tension spring; 48. spring two; 49. baffle three; 40. guide rod; 5. buffer assembly; 51. rubber sleeve; 52. bellows two; 53. air pipe. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] like Figures 1 to 8 As shown, the present invention provides a lifting structure of a digital control docking vehicle, comprising a vertical support vehicle 1 and a satellite assembly 2 installed on the vertical support vehicle 1, and further comprising;

[0034] A support assembly 3 disposed on the vertical support vehicle 1;

[0035] The support assembly 3 includes a hydraulic box 31 fixedly mounted on the bottom of the vertical support vehicle 1. The interior of the hydraulic box 31 is filled with hydraulic oil. A first chamber 302 is provided at the upper end of the interior of the hydraulic box 31. The first chamber 302 is connected to the interior of the hydraulic box 31. A plurality of hydraulic cylinders 32 are provided at the top of the hydraulic box 31. The hydraulic cylinders 32 are connected to the first chamber 302. The top of the hydraulic cylinder 32 is connected to a bellows 34 through an integration plate 33. A rubber plate 35 is provided at the top of the bellows 34. A measuring plate 36 is provided on both sides of the integration plate 33.

[0036] The support assembly 3 also includes a motor 37 fixedly mounted on the bottom of the vertical support vehicle 1, the output shaft of the motor 37 is drivingly connected to a threaded shaft 38, and the outer peripheral thread sleeve of the threaded shaft 38 is provided with a guide plate 39;

[0037] The rubber plate 35 is arc-shaped and is located directly below the satellite assembly 2. The outer side of the measuring plate 36 is provided with scale grooves and is closely attached to both sides of the rubber plate 35.

[0038] Four mutually symmetrical lifting components 4 connected to the inside of the hydraulic box 31;

[0039] The buffer components 5 are fixedly mounted on both sides of the vertical support vehicle 1 .

[0040] With the above solution, when the vertical support vehicle 1 controls the satellite assembly 2 thereon to be in a horizontal state and needs to be moved to another position, the motor 1 37 can be started, so that its output shaft drives the guide plate 39 to move through the threaded shaft 1 38, and the hydraulic oil inside the hydraulic box 31 is pressed into the first chamber 302, and at this time, the hydraulic cylinder 32 gradually drives the structure thereon to rise;

[0041] Finally, the bellows 34 will fit tightly against the outer periphery of the satellite assembly 2, and the compressible and soft nature of the bellows 34 means that if the satellite assembly 2 is in a tilted state, the rubber plate 35 will also be tilted. By reading the values ​​of the scale grooves on the two measuring plates 36, the degree of tilt of the satellite assembly 2 can be further determined. If the satellite assembly 2 is not tilted, the rubber plate 35 can still support the satellite assembly 2, thereby avoiding the situation where the satellite assembly 2 is unstable in center of gravity when on the vertical support vehicle 1, causing the satellite assembly 2 to detach from the vertical support vehicle 1 or the docking part to be deformed and damaged.

[0042] like Figure 4 and Figure 5 As shown, the support assembly 3 also includes a spring 301 fixed inside the hydraulic box 31, and the outer side of the spring 301 is elastically connected to a baffle 30. A second chamber 303 is also provided at both ends of the hydraulic box 31, and the baffle 30 is used to block the connection between the hydraulic box 31 and the second chamber 303.

[0043] The above scheme is adopted: during the movement of the guide plate 39, since the spring 1 301 always pushes the baffle 1 30 to block the connection between the inside of the hydraulic box 31 and the second chamber 303, the hydraulic oil will preferentially enter the first chamber 302 and drive the rubber plate 35 thereon to perform supporting work. When the supporting work is completed, the hydraulic oil pushes the baffle 1 30 open and enters the second chamber 303, thereby forcing the lifting component 4 to perform supporting work. Further, it can prevent the vibration generated by the lifting work of the lifting component 4 from shaking the satellite component 2, thereby causing damage to it.

[0044] like Figure 3-Figure 5 , Figure 7 and Figure 8 As shown, the lifting assembly 4 includes a transferor 41 and a positioning cylinder 42 arranged at the bottom of the vertical support vehicle 1, the transferor 41 is interconnected with the interior of the second chamber 303, the transferor 41 is connected to the interior of the positioning cylinder 42, the interior of the positioning cylinder 42 is sleeved with an extension cylinder 43, the interior of the extension cylinder 43 is elastically connected with a baffle three 49 through a spring two 48, the interior of the positioning cylinder 42 is divided into two independent upper and lower chambers by a partition, a plurality of slots are opened on the partition, and a protrusion matching the slots is arranged on the top of the baffle three 49.

[0045] The lifting assembly 4 also includes a second motor 44 fixed inside the extension tube 43. The output shaft of the second motor 44 is transmission-connected with a second threaded shaft 45. The outer periphery of the second threaded shaft 45 is sleeved with a second baffle 46. The second baffle 46 is elastically connected to the third baffle 49 through a tension spring 47.

[0046] The tension spring 47 pulls the baffle plate 3 49 to always be separated from the partition plate, and the protrusion on the baffle plate 3 49 does not block the notch on the partition plate.

[0047] With the above solution, when the hydraulic oil in the second chamber 303 enters the upper chamber inside the positioning cylinder 42 through the transfer device 41, the hydraulic oil gradually passes through the notch on the partition plate and pushes the extension cylinder 43 to extend and make the wheels on the vertical support vehicle 1 leave the ground, and the other four lifting components 4 are in the same working state, further ensuring the stability of the vertical support vehicle 1 in supporting and installing the satellite component 2;

[0048] When the level meter inside the vertical support vehicle 1 detects that the vertical support vehicle 1 is supported by the lifting assembly 4 but cannot be in a horizontal state, one of the motors 2 44 can be mobilized to start through the controller inside the vertical support vehicle 1, and the output shaft of the motor 2 44 drives the baffle 2 46 and the tension spring 47 to rise through the threaded shaft 2 45. Further, the tension applied by the tension spring 47 to the baffle 3 49 is weakened, so that the baffle 3 49 is pushed up by the spring 2 48, and the protrusion will block the notch on the partition, so that the hydraulic oil will not be pushed back to the inside of the second chamber 303 by the baffle 2 46. Similarly, the remaining three extension cylinders 43 will not extend outward because of this. This part of the hydraulic oil is always located in the lower end chamber of the positioning cylinder 42 and the extension cylinder 43, so as to further extend this part of the extension cylinder 43, until the level meter detects that the vertical support vehicle 1 is in a horizontal state, the motor 2 44 will be stopped. Further, the vertical support vehicle 1 can be prevented from deviation during the docking work.

[0049] The baffle plate 246 is located Figure 7 When the guide plate 39 is in the initial position, the protrusion on the top of the baffle plate 49 no longer blocks the notch, so that when the guide plate 39 extracts the hydraulic oil back into the interior thereof, the extension tube 43 can also retract normally, further improving the working stability of the device.

[0050] like Figure 1 and Figure 8 As shown, the buffer assembly 5 includes a rubber sleeve 51 and a second bellows 52 which are arranged on the outside of the vertical support vehicle 1 , and the rubber sleeve 51 is connected to the inside of the second bellows 52 through an air pipe 53 .

[0051] The lifting assembly 4 also includes a guide rod 40 fixed on the extension tube 43. The guide rod 40 passes through the bottom of the second bellows 52 and is connected to the top of the second bellows 52. The rubber sleeve 51 and the top of the second bellows 52 are filled with hydraulic oil.

[0052] The above scheme is adopted: when the extension tube 43 is extended, it compresses the bellows 2 52 through the guide rod 40, so that the internal hydraulic oil enters the rubber sleeve 51 through the air pipe 53. Further, the rubber sleeve 51 will be in an expanded state and can prevent external impact force from hitting the vertical support vehicle 1 and causing shaking, thereby ensuring the stability of the device during operation.

[0053] The working principle and use process of the present invention:

[0054] When the vertical support vehicle 1 controls the satellite assembly 2 thereon to be in a horizontal state and needs to be moved to another position, the motor 1 37 can be started, so that its output shaft drives the guide plate 39 to move through the threaded shaft 1 38, and the hydraulic oil inside the hydraulic box 31 is pressed into the first chamber 302, and at this time, the hydraulic cylinder 32 gradually drives the structure thereon to rise;

[0055] Finally, the bellows 1 34 will be closely attached to the outer periphery of the satellite assembly 2, and the compressible softness of the bellows 1 34 will make the rubber sheet 35 tilted when the satellite assembly 2 is tilted. By reading the values ​​of the scale grooves on the two measuring plates 36, the tilting degree of the satellite assembly 2 can be further determined. If the satellite assembly 2 is not tilted, the rubber sheet 35 can still support the satellite assembly 2.

[0056] Since the spring 1 301 always pushes the baffle 1 30 to block the connection between the inside of the hydraulic box 31 and the second chamber 303, the hydraulic oil will first enter the inside of the first chamber 302 and drive the rubber plate 35 thereon to perform the supporting work. When the supporting work is completed, the hydraulic oil pushes the baffle 1 30 open and enters the inside of the second chamber 303;

[0057] During the process of the hydraulic oil in the second chamber 303 entering the upper chamber inside the positioning cylinder 42 through the transfer device 41, the hydraulic oil gradually passes through the notch on the partition plate and pushes the extension cylinder 43 to extend and make the wheels on the vertical support vehicle 1 leave the ground, and the other four lifting components 4 are in the same working state;

[0058] When the level meter inside the vertical support vehicle 1 detects that the vertical support vehicle 1 is supported by the lifting assembly 4 but cannot be in a horizontal state, one of the motors 2 44 can be mobilized to start through the controller inside the vertical support vehicle 1, and the output shaft of the motor 2 44 drives the baffle 2 46 and the tension spring 47 to rise through the threaded shaft 2 45. Further, the tension applied by the tension spring 47 to the baffle 3 49 is weakened, so that the baffle 3 49 is pushed up by the spring 2 48, and the protrusion will block the notch on the partition, so that the hydraulic oil will not be pushed back to the inside of the second chamber 303 by the baffle 2 46. Similarly, the remaining three extension cylinders 43 will not extend to the outside. This part of the hydraulic oil is always located in the lower end chamber of the positioning cylinder 42 and the extension cylinder 43, thereby further extending this part of the extension cylinder 43, until the level meter detects that the vertical support vehicle 1 is in a horizontal state, then the motor 2 44 will be stopped;

[0059] When the extension tube 43 is extended, it compresses the bellows 2 52 through the guide rod 40, so that the hydraulic oil inside it enters the rubber sleeve 51 through the air pipe 53. Further, the rubber sleeve 51 will be in an expanded state and prevent the external impact force from hitting the vertical support vehicle 1 and causing shaking.

[0060] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0061] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A lifting structure of a CNC docking vehicle, comprising a vertical support vehicle (1) and a satellite assembly (2) mounted on the vertical support vehicle (1), characterized in that: Also includes; A support assembly (3) disposed on the vertical support vehicle (1); The support assembly (3) comprises a hydraulic box (31) fixedly mounted on the bottom of the vertical support vehicle (1), the interior of the hydraulic box (31) is filled with hydraulic oil, a first chamber (302) is arranged at the upper end of the interior of the hydraulic box (31), the first chamber (302) is communicated with the interior of the hydraulic box (31), a plurality of hydraulic cylinders (32) are arranged at the top of the hydraulic box (31), the hydraulic cylinders (32) are communicated with the first chamber (302), the top of the hydraulic cylinder (32) is connected to a bellows (34) through an integration plate (33), a rubber plate (35) is arranged at the top of the bellows (34), and a measuring plate (36) is arranged on both sides of the integration plate (33); The support assembly (3) further comprises a motor (37) fixedly mounted on the bottom of the vertical support vehicle (1), the output shaft of the motor (37) being transmission-connected to a threaded shaft (38), and the outer peripheral thread sleeve of the threaded shaft (38) is provided with a guide plate (39); The rubber plate (35) is arc-shaped and is located directly below the satellite assembly (2). The outer side of the measuring plate (36) is provided with a scale groove and is closely attached to both sides of the rubber plate (35); Four mutually symmetrical lifting components (4) connected to the interior of the hydraulic box (31); Buffer components (5) are fixedly mounted on both sides of the vertical support vehicle (1).

2. The lifting structure of the CNC docking vehicle according to claim 1 is characterized in that: The support assembly (3) further comprises a spring (301) fixedly mounted inside the hydraulic box (31); the outer side of the spring (301) is elastically connected to a baffle (30); a second chamber (303) is provided at each of the two ends inside the hydraulic box (31); the baffle (30) is used to block the connection between the hydraulic box (31) and the second chamber (303).

3. The lifting structure of the CNC docking vehicle according to claim 2 is characterized in that: The lifting assembly (4) includes a transfer device (41) and a positioning cylinder (42) arranged at the bottom of the vertical support vehicle (1); the transfer device (41) is communicated with the interior of the second chamber (303); the transfer device (41) is communicated with the interior of the positioning cylinder (42); an extension cylinder (43) is sleeved inside the positioning cylinder (42); the interior of the extension cylinder (43) is elastically connected to a baffle plate three (49) via a spring two (48); the interior of the positioning cylinder (42) is divided into two upper and lower independent chambers by a partition; a plurality of slots are opened on the partition; a protrusion matching the slots is arranged on the top of the baffle plate three (49).

4. The lifting structure of the CNC docking vehicle according to claim 3 is characterized in that: The lifting assembly (4) further comprises a second motor (44) fixedly mounted inside the extension tube (43); the output shaft of the second motor (44) is drivingly connected to a second threaded shaft (45); a second baffle (46) is sleeved on the outer periphery of the second threaded shaft (45); and the second baffle (46) is elastically connected to a third baffle (49) via a tension spring (47).

5. The lifting structure of the CNC docking vehicle according to claim 4 is characterized in that: The tension spring (47) pulls the baffle plate three (49) to always be separated from the partition plate, and the protrusion on the baffle plate three (49) does not block the notch on the partition plate.

6. The lifting structure of the CNC docking vehicle according to claim 5 is characterized in that: The buffer assembly (5) comprises a rubber sleeve (51) and a second bellows (52) arranged on the outside of the vertical support vehicle (1); the rubber sleeve (51) is connected to the inside of the second bellows (52) through an air pipe (53).

7. The lifting structure of the CNC docking vehicle according to claim 6 is characterized in that: The lifting assembly (4) also includes a guide rod (40) fixedly mounted on the extension tube (43), wherein the guide rod (40) passes through the bottom of the second bellows (52) and is connected to the top of the second bellows (52), and the rubber sleeve (51) and the top of the second bellows (52) are both filled with hydraulic oil.

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