Support device

Abstract

The utility model provides a supporting device which comprises a telescopic part, a supporting part and a supporting part. The telescopic part comprises a first connecting part and a second connecting part which are arranged in a sleeved mode. The height of the first unit support is adjustable, and the first unit support is detachably arranged on the first connecting part; the height of the second unit support is adjustable, and the second unit support is detachably arranged at the end, located on the outer side of the first connecting part, of the second connecting part; the supporting part is provided with a first connecting end and a supporting end which are oppositely arranged, the first connecting end is arranged on the first connecting part, the supporting end is located below the first connecting end, the distance between the supporting end and the first connecting end is adjustable, and the supporting part can support the telescopic part. According to the scheme, the problems that in the prior art, a unit support is pushed and pulled through a traction rope, the labor intensity is large, and the controllability of the pushing direction and the stroke step pitch is low can be solved.

Description

Technical Field

[0001] The utility model relates to the technical field of support devices, and in particular to a support device. Background Art

[0002] A variety of support methods are used underground in coal mines. Comprehensively mechanized mining working faces and fully mechanized caving working faces are usually supported by height-adjustable unit supports. The unit supports have a simple structure, a stable system, a large support area, and high support strength.

[0003] The unit support cannot realize the self-moving function. In the prior art, the unit support is usually moved by workers through a traction rope to adjust the position of the unit support during the tunnel excavation process.

[0004] However, pushing and pulling the unit bracket by means of a traction rope is labor-intensive and has low controllability over the pushing direction and travel step distance. Utility Model Content

[0005] The utility model provides a supporting device to solve the problems in the prior art of pushing and pulling a unit bracket by means of a traction rope, which has high labor intensity and low controllability of the pushing direction and the stroke step.

[0006] The utility model provides a supporting device, which includes: a telescopic part, including a first connecting part and a second connecting part which are arranged in a mutually socketed manner, one end of the second connecting part is movably inserted into the first connecting part, and the other end of the second connecting part is located on the outside of the first connecting part; a first unit bracket, the height of the first unit bracket is adjustable, and the first unit bracket is detachably arranged on the first connecting part; a second unit bracket, the height of the second unit bracket is adjustable, and the second unit bracket is detachably arranged on one end of the second connecting part which is located on the outside of the first connecting part; a supporting part, having a first connecting end and a supporting end which are arranged opposite to each other, the first connecting end is arranged on the first connecting part, the supporting end is located below the first connecting end, the spacing between the supporting ends relative to the first connecting end is adjustable, and the supporting part can support the telescopic part.

[0007] Furthermore, the support device also includes: a walking part, having a second connecting end and a walking end that are relatively arranged, the second connecting end is arranged on the first connecting part, the walking end is located below the second connecting end, the distance between the walking end and the second connecting end is adjustable, and the walking end includes a pulley, which is used to contact the ground.

[0008] Furthermore, the support portion includes: a first telescopic member, one end of which is arranged on the first connecting portion and forms a first connecting end; and a support plate, which is arranged at the other end of the first telescopic member and forms a supporting end.

[0009] Furthermore, the walking part further includes: a second telescopic member, one end of the second telescopic member is arranged on the first connecting portion to form a second connecting end, and the pulley is arranged at the other end of the second telescopic member.

[0010] Furthermore, the first connecting part includes a connecting tube, the connecting tube includes a blocking end and an open end arranged opposite to each other, the connecting tube has an opening and a sliding cavity connected to each other, and the opening is arranged at the open end; the second connecting part includes a first sealing part and a sliding rod connected in sequence along the axial direction, the first sealing part is passed through the connecting tube, and the end of the sliding rod away from the first sealing part is located on the outside of the connecting tube, the sliding rod is sealed and matched with the open end of the connecting tube, and the first sealing part divides the sliding cavity into a first chamber and a second chamber that are independent of each other along the direction from the blocking end to the open end, and a first oil port and a second oil port are provided on the connecting tube, the first oil port is connected to the end of the first chamber away from the second chamber, and the second oil port is connected to the end of the second chamber away from the first chamber.

[0011] Furthermore, the first connecting portion further includes: a second sealing portion fixedly arranged at the opening of the connecting tube, the second sealing portion being sleeved on the sliding rod, and the inner side wall of the second sealing portion being in contact with the circumference of the sliding rod.

[0012] Furthermore, the support device also includes: a first oil pipe, one end of which is arranged at the first oil port and connected to the first oil port; and a second oil pipe, one end of which is arranged at the second oil port and used to connect to the second oil port.

[0013] Furthermore, the support device also includes: a first fixing member, which is arranged on the connecting tube, and the first oil pipe is installed on the connecting tube through the first fixing member; a second fixing member, which is arranged on the connecting tube, and the second oil pipe is installed on the connecting tube through the second fixing member.

[0014] Furthermore, the first connecting portion also includes an extension rod, which is arranged at the blocking end of the connecting tube. The length direction of the extension rod is the same as the length direction of the connecting tube, and the first connecting portion is arranged on the side of the extension rod away from the connecting tube.

[0015] Furthermore, the support device also includes: a first fastening assembly, which is arranged between the first unit bracket and the first connecting part, and the first unit bracket and the first connecting part are connected through the first fastening assembly; a second fastening assembly, which is arranged between the second unit bracket and the second connecting part, and the second unit bracket and the second connecting part are connected through the second fastening assembly.

[0016] The technical solution of the present invention facilitates adjustment of the positions of the first and second unit supports by disposing the first and second unit supports on the first and second connecting portions of the telescopic portion, respectively. This simplifies the structure and reduces labor intensity. Furthermore, during the support process, the first and second unit supports support the telescopic portion, ensuring its stability. Specifically, during construction, the first and second unit supports are arranged along the tunneling direction of the roadway. When the position of the second unit support needs to be adjusted, the telescopic portion is ensured to be in an extended state, the first unit support is ensured to be in an extended state, and the second unit support is ensured to be in a retracted state. The first unit support supports the tunnel. Under the action of friction, the position of the first unit support relative to the ground remains unchanged. The second unit support is in a retracted state and no longer supports the tunnel. The telescopic portion switches from an extended state to a retracted state, and the telescopic portion drives the second unit support to move closer to the first unit support. The telescopic portion switches from an extended state to a retracted state. When the position of the first unit support needs to be adjusted, the telescopic portion is ensured to be in a retracted state, the first unit support is ensured to be in a retracted state, and the second unit support is ensured to be in an extended state. The second unit support supports the tunnel. Under the action of friction, the position of the second unit support relative to the ground remains unchanged. The first unit support is in a retracted state and no longer supports the tunnel. The telescopic portion switches from a retracted state to an extended state, and the telescopic portion drives the first unit support to move closer to and away from the second unit support. In traditional technical solutions, workers adjust the position of the unit supports by pulling ropes, which is labor-intensive and has low controllability in terms of movement direction and travel step length. Compared with the traditional technical solutions, the setting of this solution has a simple structure, can reduce the labor intensity of the staff, and has high controllability in terms of the moving direction and travel step. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings constituting part of this application are provided to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are provided to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0018] Figure 1 A schematic structural diagram of a support device provided by an embodiment of the present utility model is shown;

[0019] Figure 2 A schematic structural diagram of a support portion provided by an embodiment of the present utility model is shown;

[0020] Figure 3 It shows a schematic structural diagram of the walking part provided by an embodiment of the utility model;

[0021] Figure 4A schematic diagram of the partial structure of the telescopic portion provided by an embodiment of the present utility model is shown;

[0022] Figure 5 A side view of the telescopic portion provided by an embodiment of the present utility model is shown.

[0023] The above drawings include the following reference numerals:

[0024] 10. Telescopic part;

[0025] 11. First connecting portion; 1101. First chamber; 1102. Second chamber; 1103. First oil port; 1104. Second oil port;

[0026] 111, connecting tube;

[0027] 112. Second sealing portion;

[0028] 113. Extension rod;

[0029] 12. Second connecting portion;

[0030] 121. First sealing portion; 122. Sliding rod;

[0031] 21. First unit bracket; 22. Second unit bracket;

[0032] 30. Support portion; 31. First telescopic member; 32. Support plate;

[0033] 40. Walking unit; 41. Second telescopic member; 42. Pulley;

[0034] 50. Second oil pipeline;

[0035] 61. First fixing member; 62. Second fixing member;

[0036] 70. First fastening assembly;

[0037] 80. Second fastening assembly. DETAILED DESCRIPTION

[0038] 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 embodiments described are only part of the embodiments of the present invention, not all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is in no way intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0039] like Figure 1As shown, an embodiment of the utility model provides a support device, which includes a telescopic part 10, a first unit bracket 21, a second unit bracket 22 and a support part 30. The telescopic part 10 includes a first connecting part 11 and a second connecting part 12 which are arranged in a mutually sleeved manner. One end of the second connecting part 12 is movably inserted into the first connecting part 11, and the other end of the second connecting part 12 is located on the outside of the first connecting part 11. The height of the first unit bracket 21 is adjustable, and the first unit bracket 21 is detachably arranged on the first connecting part 11. The height of the second unit bracket 22 is adjustable, and the second unit bracket 22 is detachably arranged on the end of the second connecting part 12 which is located on the outside of the first connecting part 11. The support part 30 has a first connecting end and a supporting end which are arranged opposite to each other. The first connecting end is arranged on the first connecting part 11, and the supporting end is located below the first connecting end. The spacing between the supporting ends relative to the first connecting end is adjustable, and the support part 30 can support the telescopic part 10.

[0040] By applying the technical solution of the present invention, by respectively arranging the first unit bracket 21 and the second unit bracket 22 on the first connecting portion 11 and the second connecting portion 12 of the telescopic portion 10, it is possible to easily adjust the positions of the first unit bracket 21 and the second unit bracket 22. The structure is simple and the labor intensity is low. During the support process of the first unit bracket 21 and the second unit bracket 22, the support portion 30 supports the telescopic portion 10, which can ensure the stability of the telescopic portion 10. When the telescopic portion 10 switches between the extended state and the contracted state, the support portion 30 is in the contracted state to avoid friction between the support portion 30 and the ground.

[0041] Specifically, during the construction process, the first unit support 21 and the second unit support 22 are distributed along the excavation direction of the tunnel, and the second unit support 22 is located behind the first unit support 21 . When the position of the second unit bracket 22 needs to be adjusted, the telescopic part 10 is ensured to be in the extended state, the first unit bracket 21 is ensured to be in the extended state, the second unit bracket 22 is ensured to be in the retracted state, and the first unit bracket 21 supports the tunnel. Under the action of friction, the position of the first unit bracket 21 relative to the ground remains unchanged, the second unit bracket 22 is in the retracted state, and the second unit bracket 22 no longer supports the tunnel. The telescopic part 10 switches from the extended state to the retracted state, and the telescopic part 10 drives the second unit bracket 22 to move in the direction close to the first unit bracket 21. When the position of the first unit bracket 21 needs to be adjusted, the telescopic part 10 is ensured to be in the retracted state, the first unit bracket 21 is ensured to be in the retracted state, and the second unit bracket 22 is ensured to be in the extended state. The second unit bracket 22 supports the tunnel. Under the action of friction, the position of the second unit bracket 22 relative to the ground remains unchanged, the first unit bracket 21 is in the retracted state, and the first unit bracket 21 no longer supports the tunnel. The telescopic part 10 switches from the retracted state to the extended state, and the telescopic part 10 drives the first unit bracket 21 to move in the direction close to and away from the second unit bracket 22. In traditional technical solutions, workers adjust the position of the unit bracket by pulling ropes, which is labor-intensive and has low controllability over the direction and stroke length. Compared with traditional technical solutions, the configuration of this solution has a simple structure, can reduce workers' labor intensity, and has high controllability over the direction and stroke length.

[0042] like Figure 1 and Figure 2 As shown, in some embodiments of this solution, the support portion 30 includes a first telescopic member 31 and a support plate 32. One end of the first telescopic member 31 is disposed on the first connecting portion 11 and forms a first connecting end. The support plate 32 is disposed at the other end of the first telescopic member 31 and forms a supporting end. The first telescopic member 31 can be configured as a telescopic air cylinder or a telescopic oil cylinder. This configuration provides a simple structure and greater ease of operation.

[0043] In some embodiments of this solution, the support portion 30 includes a first screw, a first nut, and a support plate. The first screw is disposed on the first connecting portion 11, the first nut is threadably engaged with the first screw, and the support plate is disposed on the first nut. This arrangement provides a self-locking effect between the first screw and the first nut, thereby ensuring the stability of the support plate.

[0044] like Figure 1 and Figure 3As shown, further, the support device also includes a walking portion 40, and the walking portion 40 has a second connecting end and a walking end that are relatively arranged. The second connecting end is arranged on the first connecting portion 11, and the walking end is located below the second connecting end. The distance between the walking end and the second connecting end is adjustable, and the walking end includes a pulley 42, and the pulley 42 is used to contact the ground. When the support portion 30 supports the telescopic portion 10, the pulley 42 is separated from the ground to ensure the supporting effect and positioning effect of the support portion 30 on the telescopic portion 10, and there is a certain friction between the support portion 30 and the ground. When the telescopic portion 10 switches between the extended state and the contracted state, the walking portion 40 is in the extended state, and the pulley 42 rolls on the ground to improve the smoothness of the telescopic portion 10 during the extension and contraction process.

[0045] In some embodiments of this solution, the walking unit 40 further includes a second telescopic member 41. One end of the second telescopic member 41 is disposed on the first connecting portion 11 and forms a second connecting end. A pulley 42 is disposed at the other end of the second telescopic member 41. The second telescopic member 41 can be configured as a telescopic air cylinder or a telescopic oil cylinder. This configuration provides a simple structure and greater ease of operation.

[0046] In some embodiments of this solution, the travel portion 40 includes a second lead screw, a second nut, and a pulley. The second lead screw is disposed on the first connecting portion 11, the second nut is threadably engaged with the second lead screw, and the pulley is disposed on the second nut. This arrangement provides a self-locking effect between the second lead screw and the second nut, thereby ensuring stability during the travel of the pulley.

[0047] like Figure 1 and Figure 4 As shown, specifically, the first connecting portion 11 includes a connecting cylinder 111, the connecting cylinder 111 includes a blocking end and an open end arranged opposite to each other, the connecting cylinder 111 has an opening and a sliding cavity that are connected to each other, and the opening is arranged at the open end. The second connecting part 12 includes a first sealing part 121 and a sliding rod 122 connected in sequence along the axial direction. The first sealing part 121 is inserted into the connecting tube 111, and the end of the sliding rod 122 away from the first sealing part 121 is located on the outside of the connecting tube 111. The sliding rod 122 is sealed with the open end of the connecting tube 111. The first sealing part 121 divides the sliding cavity into a first chamber 1101 and a second chamber 1102 which are independent of each other along the direction from the blocking end to the open end. A first oil port 1103 and a second oil port 1104 are provided on the connecting tube 111. The first oil port 1103 is connected to the end of the first chamber 1101 away from the second chamber 1102, and the second oil port 1104 is connected to the end of the second chamber 1102 away from the first chamber 1101. The volumes of the first chamber 1101 and the second chamber 1102 are variable. When the volume of the first chamber 1101 increases, the volume of the second chamber 1102 decreases; when the volume of the first chamber 1101 decreases, the volume of the second chamber 1102 increases.

[0048] When it is necessary to switch the telescopic part 10 from the contracted state to the extended state, oil is injected into the first oil port 1103. The oil enters the first chamber 1101 through the first oil port 1103 and pushes the first sealing part 121 and the sliding rod 122 to move outward. At the same time, the oil in the second chamber 1102 is discharged from the second chamber 1102 through the second oil port 1104.

[0049] When it is necessary to switch the telescopic part 10 from the extended state to the contracted state, oil is injected into the second oil port 1104. The oil enters the second chamber 1102 through the second oil port 1104 and pushes the first sealing part 121 to drive the slide rod 122 to move toward the blocking end of the connecting tube. At the same time, the oil in the first chamber 1101 is discharged from the first chamber 1101 through the first oil port 1103.

[0050] Furthermore, the first connecting portion 11 also includes a second sealing portion 112, which is fixedly disposed at the opening of the connecting tube 111. The second sealing portion 112 is sleeved onto the sliding rod 122, and the inner sidewall of the second sealing portion 112 is in contact with the circumference of the sliding rod 122. The provision of the second sealing portion 112 can reduce or prevent oil from overflowing from the gap between the sliding rod 122 and the opening of the connecting tube.

[0051] In the embodiment of this solution, the support device further includes a first oil pipe and a second oil pipe 50. One end of the first oil pipe is disposed at and communicates with the first oil port 1103; one end of the second oil pipe 50 is disposed at and communicates with the second oil port 1104. This arrangement improves the convenience of injecting and discharging oil into and out of the first chamber 1101 and the second chamber 1102.

[0052] Specifically, the first oil pipe and the second oil pipe 50 are distributed at intervals along the circumference of the connecting tube. Such an arrangement can avoid interference between the first oil pipe and the second oil pipe 50, and facilitate replacement of the first oil pipe and the second oil pipe 50.

[0053] like Figure 4 and Figure 5 As shown, the support device further includes a first fixing member 61 and a second fixing member 62. The first fixing member 61 is disposed on the connecting tube 111, and the first oil pipe is mounted on the connecting tube 111 via the first fixing member 61. The second fixing member 62 is disposed on the connecting tube 111, and the second oil pipe 50 is mounted on the connecting tube 111 via the second fixing member 62. This arrangement can improve the stability of the first and second oil pipes 50.

[0054] In the embodiment of this solution, the first connecting portion 11 further includes an extension rod 113, which is disposed at the blocked end of the connecting tube 111. The length of the extension rod 113 is the same as that of the connecting tube 111, and the first connecting portion 11 is disposed on a side of the extension rod 113 away from the connecting tube 111. The provision of the extension rod 113 can further increase the travel step of the device and improve the adaptability of the device.

[0055] like Figure 1 As shown, the support device further includes a first fastening assembly 70, which is disposed between the first unit bracket 21 and the first connecting portion 11. The first unit bracket 21 and the first connecting portion 11 are connected via the first fastening assembly 70. The provision of the first fastening assembly 70 facilitates assembly and disassembly of the first unit bracket 21 and the first connecting portion 11.

[0056] In an embodiment of the present scheme, the first fastening assembly 70 includes a first connecting head, a second connecting head, a first fastening bolt and a first fastening nut. The first connecting head is arranged at the end of the extension rod 113 away from the connecting tube 111. The first connecting head is provided with a first mounting groove. The second connecting head is arranged on the base of the first unit bracket 21. The second connecting head is passed through the first mounting groove. The first connecting head and the second connecting head are connected by a first fastening bolt and a first fastening nut.

[0057] Furthermore, the support device further includes a second fastening assembly 80, which is disposed between the second unit bracket 22 and the second connecting portion 12. The second unit bracket 22 and the second connecting portion 12 are connected via the second fastening assembly 80. The provision of the second fastening assembly 80 facilitates assembly and disassembly of the second unit bracket 22 and the second connecting portion 12.

[0058] In an embodiment of the present scheme, the second fastening assembly 80 includes a third connector, a fourth connector, a second fastening bolt and a second fastening nut. The third connector is arranged at the end of the sliding rod 122 away from the first sealing portion 121. The third connector is provided with a second mounting groove. The fourth connector is inserted into the second mounting groove. The third connector and the fourth connector are connected by the second fastening bolt and the second fastening nut.

[0059] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or combinations thereof.

[0060] Unless otherwise specified, the relative arrangement of the parts and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present invention. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to actual proportional relationships. The technology, methods and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be considered as part of the specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that similar numbers and letters represent similar items in the following figures, and therefore, once an item is defined in one figure, it does not need to be further discussed in subsequent figures.

[0061] In the description of the present invention, it needs to be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "horizontal, vertical, vertical, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention; the directional words "inside and outside" refer to the inside and outside relative to the outline of each component itself.

[0062] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used herein to describe the spatial positional relationship of a device or feature to other devices or features as shown in the figures. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figures. For example, if the device in the drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0063] In addition, it should be noted that the use of words such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above words have no special meaning and therefore cannot be understood as limiting the scope of protection of this utility model.

[0064] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A support device, characterized in that: include: The telescopic portion (10) comprises a first connecting portion (11) and a second connecting portion (12) which are sleeved together, one end of the second connecting portion (12) being movably inserted into the first connecting portion (11), and the other end of the second connecting portion (12) being located outside the first connecting portion (11); a first unit bracket (21), the height of the first unit bracket (21) being adjustable, and the first unit bracket (21) being detachably arranged on the first connecting portion (11); a second unit bracket (22), the height of the second unit bracket (22) being adjustable, and the second unit bracket (22) being detachably arranged at one end of the second connecting portion (12) located outside the first connecting portion (11); The support portion (30) comprises a first connecting end and a supporting end which are arranged opposite to each other, wherein the first connecting end is arranged on the first connecting portion (11), the supporting end is located below the first connecting end, and the spacing between the supporting end and the first connecting end is adjustable, and the support portion (30) is capable of supporting the telescopic portion (10).

2. The support device according to claim 1, characterized in that: The support device also includes: The walking portion (40) comprises a second connecting end and a walking end which are arranged opposite to each other, wherein the second connecting end is arranged on the first connecting portion (11), the walking end is located below the second connecting end, and the distance between the walking end and the second connecting end is adjustable, and the walking end comprises a pulley (42), and the pulley (42) is used to contact the ground.

3. The support device according to claim 1, characterized in that: The support portion (30) comprises: A first telescopic member (31), one end of the first telescopic member (31) being arranged on the first connecting portion (11) and forming the first connecting end; A support plate (32) is arranged at the other end of the first telescopic member (31), and the support plate (32) forms the support end.

4. The support device according to claim 2, characterized in that: The walking part (40) further includes: A second telescopic member (41), one end of the second telescopic member (41) is arranged on the first connecting portion (11) and forms the second connecting end, and the pulley (42) is arranged at the other end of the second telescopic member (41).

5. The support device according to claim 1, characterized in that: The first connecting portion (11) comprises a connecting tube (111), the connecting tube (111) comprises a blocking end and an opening end which are arranged opposite to each other, the connecting tube (111) has an opening and a sliding cavity which are communicated with each other, and the opening is arranged at the opening end; The second connecting portion (12) comprises a first sealing portion (121) and a sliding rod (122) which are sequentially connected along the axial direction. The first sealing portion (121) is inserted into the connecting tube (111). An end of the sliding rod (122) which is away from the first sealing portion (121) is located outside the connecting tube (111). The sliding rod (122) is sealed with the open end of the connecting tube (111). The first sealing portion (121) divides the sliding cavity into two parts along the sealing portion. A first chamber (1101) and a second chamber (1102) are independent of each other in a direction from the blocked end to the open end, and a first oil port (1103) and a second oil port (1104) are provided on the connecting tube (111), the first oil port (1103) is communicated with an end of the first chamber (1101) away from the second chamber (1102), and the second oil port (1104) is communicated with an end of the second chamber (1102) away from the first chamber (1101).

6. The support device according to claim 5, characterized in that: The first connecting portion (11) further comprises: The second sealing portion (112) is fixedly arranged at the opening of the connecting tube (111), the second sealing portion (112) is sleeved on the sliding rod (122), and the inner side wall of the second sealing portion (112) is in contact with the peripheral surface of the sliding rod (122).

7. The support device according to claim 5, characterized in that: The support device also includes: a first oil pipe, one end of which is arranged at the first oil port (1103) and communicated with the first oil port (1103); A second oil pipe (50), one end of the second oil pipe (50) is arranged at the second oil port (1104) and is used to communicate with the second oil port (1104).

8. The support device according to claim 7, characterized in that: The support device also includes: A first fixing member (61) is arranged on the connecting tube (111), and the first oil pipe is installed on the connecting tube (111) through the first fixing member (61); The second fixing member (62) is arranged on the connecting tube (111), and the second oil pipe (50) is installed on the connecting tube (111) through the second fixing member (62).

9. The support device according to claim 5, characterized in that: The first connecting portion (11) further comprises an extension rod (113), wherein the extension rod (113) is arranged at the blocking end of the connecting tube (111), the length direction of the extension rod (113) is the same as the length direction of the connecting tube (111), and the first connecting portion (11) is arranged on a side of the extension rod (113) away from the connecting tube (111).

10. The support device according to claim 1, characterized in that: The support device also includes: a first fastening assembly (70) disposed between the first unit bracket (21) and the first connecting portion (11), wherein the first unit bracket (21) and the first connecting portion (11) are connected via the first fastening assembly (70); A second fastening assembly (80) is arranged between the second unit bracket (22) and the second connecting portion (12); the second unit bracket (22) and the second connecting portion (12) are connected via the second fastening assembly (80).

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