Protective device and hydraulic support with same

Abstract

The utility model provides a protection device and hydraulic support equipment with the protection device, a limiting structure of the protection device is arranged on a hydraulic support, the limiting structure is used for limiting and stopping the hydraulic support adjacent to the hydraulic support, and at least part of the limiting structure is located between the two adjacent hydraulic supports; the blocking assembly is arranged on the limiting structure and used for blocking the flying objects, the blocking assembly comprises a first blocking structure and a second blocking structure, and the second blocking structure is movably arranged; wherein the second blocking structure is provided with a first blocking position and a second blocking position, when the second blocking structure is located at the first blocking position, the second blocking structure is overlapped with at least part of the first blocking structure, and when the second blocking structure is located at the second blocking position, the second blocking structure moves away from the first blocking structure; therefore, the blocking area of the blocking assembly is adjusted. The hydraulic support effectively solves the problems that a hydraulic support in the prior art is prone to biting and poor in protection performance.

Description

Technical Field

[0001] The utility model relates to the technical field of hydraulic supports, and more specifically, to a protection device and a hydraulic support device having the same. Background Art

[0002] Currently, during coal mining, a large number of hydraulic supports are usually arranged side by side on a fully mechanized coal mining face. The hydraulic supports can support the coal wall to ensure high work safety for the staff.

[0003] In the prior art, adjacent hydraulic supports can move along the surface of the side guard plate of the hydraulic support during the pulling and lifting processes to prevent the hydraulic support from moving into the support space of the adjacent hydraulic support, resulting in structural interference (i.e., the "biting frame" phenomenon) between the hydraulic support and the adjacent hydraulic support when the hydraulic support is lifted.

[0004] However, in actual application, for a fully mechanized coal mining face with large mining height, the hydraulic supports in the prior art have two problems:

[0005] 1. The drop between the mining height of the fully mechanized coal mining face with large mining height and the roadway is larger than that of a conventional fully mechanized coal mining face. The pulling and lifting distances of the end transition supports are relatively large. The side guard plates in the prior art are not optimized specifically (with a very small area), resulting in the end transition supports being prone to moving out of alignment with the side guard plates of the vertical transition supports during the pulling and lifting processes, and then moving into the support space of the vertical transition supports and causing the "biting frame" phenomenon.

[0006] 2. The roadway width of the fully mechanized coal mining face with large mining height is relatively large, and the distance between the hydraulic support and the roadway side wall is relatively large. When the coal rib spalling phenomenon occurs, the coal blocks squeezed and ejected are likely to fly directly obliquely into the protection space of the hydraulic support, posing a great safety hazard to the staff in the support space. Summary of the Utility Model

[0007] The main purpose of the present utility model is to provide a protection device and a hydraulic support device having the same to solve the problems that the hydraulic supports in the prior art are prone to the "biting frame" phenomenon and have poor protection performance.

[0008] To achieve the above object, according to one aspect of the present utility model, a protective device is provided. The protective device includes: a limiting structure disposed on a hydraulic support, the limiting structure being used for limiting and stopping against an adjacent hydraulic support, and at least part of the limiting structure being located between two adjacent hydraulic supports; a blocking assembly disposed on the limiting structure and used for blocking flying objects, the blocking assembly including a first blocking structure and a second blocking structure, and the second blocking structure being movably disposed; wherein, the second blocking structure has a first blocking position and a second blocking position. When the second blocking structure is in the first blocking position, the second blocking structure overlaps with at least part of the first blocking structure. When the second blocking structure is in the second blocking position, the second blocking structure moves away from the first blocking structure to adjust the blocking area of the blocking assembly.

[0009] Further, the limiting structure is in a plate shape, and the plate surface of the limiting structure away from the support space of the hydraulic support is used for limiting and stopping against an adjacent hydraulic support.

[0010] Further, the protective device further includes: a driving structure drivingly connected to the second blocking structure, the driving structure being used for driving the second blocking structure to move towards or away from the first blocking structure.

[0011] Further, the first blocking structure is in a plate shape, and the protective device further includes: a connecting member disposed on the limiting structure and connected to the first blocking structure, and the first blocking structure is spaced apart from the limiting structure through the connecting member.

[0012] Further, the second blocking structure is in a plate shape, the driving structure is a driving cylinder, the driving cylinder includes a cylinder body and a piston rod, one of the cylinder body and the piston rod is disposed on the limiting structure, and the other of the cylinder body and the piston rod is connected to the second blocking structure.

[0013] Further, the protective device further includes: a control module; a detection device disposed on the hydraulic support and / or the limiting structure, the detection device being used for detecting whether there are flying objects in a preset area; wherein, the control module is connected to both the detection device and the driving structure, and the control module controls the piston rod to extend or retract according to the detection value of the detection device.

[0014] Further, both the first blocking structure and the second blocking structure are in a plate shape, and a first chamfer is provided at at least part of the edges of the first blocking structure; and / or, a second chamfer is provided at at least part of the edges of the second blocking structure.

[0015] Further, the protective device further includes a transmission assembly, the driving structure is drivingly connected to the second blocking structure, and the transmission assembly includes: a gear sleeved on the output shaft of the driving structure; a rack slidably disposed on the limiting structure and meshing with the gear, and one end of the rack is connected to the second blocking structure.

[0016] Further, the protection device further includes: a buffer structure disposed on the surface of the limit structure away from the hydraulic support; and / or, on the surface of the blocking assembly away from the hydraulic support.

[0017] According to another aspect of the present invention, a hydraulic support device is provided, which includes a hydraulic support and a protection device, and the protection device is the above-mentioned protection device.

[0018] Applying the technical solution of the present invention, the limit structure of the protection device is disposed on the hydraulic support. The limit structure is used for limiting and blocking the adjacent hydraulic support, and at least part of the limit structure is located between two adjacent hydraulic supports. The blocking assembly is disposed on the limit structure and is used for blocking flying objects. The blocking assembly includes a first blocking structure and a second blocking structure, and the second blocking structure is movably disposed. Wherein, the second blocking structure has a first blocking position and a second blocking position. When the second blocking structure is in the first blocking position, the second blocking structure overlaps with at least part of the first blocking structure. When the second blocking structure is in the second blocking position, the second blocking structure moves away from the first blocking structure to adjust the blocking area of the blocking assembly. In this way, when the staff pulls and lifts the end transition frame, the limit structure disposed on the vertical transition frame can contact the end transition frame and limit and block the end transition frame, avoiding the end transition frame from shifting into the support space of the vertical transition frame, resulting in a "jamming" phenomenon between the end transition frame and the vertical transition frame when the end transition frame rises, thereby improving the movement stability and support reliability of the hydraulic support. At the same time, the above settings can, on the one hand, block flying objects to prevent them from flying into the support space of the hydraulic support, thus improving the safety of the staff's work; on the other hand, enable the blocking assembly to adjust the blocking area of the blocking assembly through the movement of the second blocking structure, so that when the second blocking structure moves to the second blocking position, it can block flying objects in a larger area, expanding the blocking area of the blocking assembly, improving the protection performance of the hydraulic support, further improving the safety of the staff's work, and thus solving the problems of easy jamming and poor protection performance of the hydraulic support in the prior art. Description of the Drawings

[0019] The specification drawings forming a part of this application are used to provide a further understanding of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation to the present invention. In the drawings:

[0020] Figure 1 Shows a schematic diagram of the overall structure of an embodiment of a hydraulic support protection device according to the present invention;

[0021] Figure 2 Shows Figure 1Schematic diagram of the overall structure of another state of the embodiment of the hydraulic support protection device;

[0022] Figure 3 shows Figure 1 Schematic diagram of a partial structure of the embodiment of the hydraulic support protection device;

[0023] Figure 4 shows Figure 1 Schematic diagram of the overall structure of the hydraulic support protection device arranged on the hydraulic support.

[0024] Among them, the above-mentioned drawings include the following reference numerals:

[0025] 1. Hydraulic support;

[0026] 10. Limit structure;

[0027] 20. Blocking assembly; 21. First blocking structure; 211. First chamfer; 22. Second blocking structure; 221. Second chamfer;

[0028] 30. Driving structure; 31. Cylinder block; 32. Piston rod;

[0029] 40. Connecting piece. Detailed implementation manners

[0030] It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments may be combined with each other. The present invention will be described in detail below with reference to the drawings and in combination with the embodiments.

[0031] It should be pointed out that unless otherwise specified, all technical and scientific terms used in the present application have the same meanings as those commonly understood by those of ordinary skill in the technical field to which the present application belongs.

[0032] In the present invention, unless otherwise stated, the orientation terms such as "upper, lower" are generally in the direction shown in the drawings, or in the vertical, perpendicular or gravitational direction; similarly, for the convenience of understanding and description, "left, right" are generally left and right as shown in the drawings; "inside, outside" refer to inside and outside the contour of each component itself, but the above orientation terms are not used to limit the present invention.

[0033] In order to solve the problems that the hydraulic support in the prior art is prone to the phenomenon of bracket jamming and has poor protection performance, the present application provides a protection device and a hydraulic support device having the same.

[0034] Such as Figures 1 to 4As shown, the protection device includes a limit structure 10 and a blocking assembly 20. The limit structure 10 is arranged on the hydraulic support 1. The limit structure 10 is used for limiting and stopping against the hydraulic support 1 adjacent to the hydraulic support 1, and at least part of the limit structure 10 is located between two adjacent hydraulic supports 1. The blocking assembly 20 is arranged on the limit structure 10 and is used for blocking flying objects. The blocking assembly 20 includes a first blocking structure 21 and a second blocking structure 22, and the second blocking structure 22 is movably arranged. Wherein, the second blocking structure 22 has a first blocking position and a second blocking position. When the second blocking structure 22 is in the first blocking position, the second blocking structure 22 overlaps with at least part of the first blocking structure 21. When the second blocking structure 22 is in the second blocking position, the second blocking structure 22 moves away from the first blocking structure 21 to adjust the blocking area of the blocking assembly 20.

[0035] Applying the technical solution of this embodiment, the limit structure 10 of the protection device is arranged on the hydraulic support 1. The limit structure 10 is used for limiting and stopping against the hydraulic support 1 adjacent to the hydraulic support 1, and at least part of the limit structure 10 is located between two adjacent hydraulic supports 1. The blocking assembly 20 is arranged on the limit structure 10 and is used for blocking flying objects. The blocking assembly 20 includes a first blocking structure 21 and a second blocking structure 22, and the second blocking structure 22 is movably arranged. Wherein, the second blocking structure 22 has a first blocking position and a second blocking position. When the second blocking structure 22 is in the first blocking position, the second blocking structure 22 overlaps with at least part of the first blocking structure 21. When the second blocking structure 22 is in the second blocking position, the second blocking structure 22 moves away from the first blocking structure 21 to adjust the blocking area of the blocking assembly 20. In this way, when the staff pulls and moves or raises and lowers the end transition support, the limit structure 10 arranged on the vertical transition support can contact the end transition support and limit and stop the end transition support, avoiding the end transition support from shifting into the support space of the vertical transition support, which may cause the "jamming" phenomenon between the end transition support and the vertical transition support when the end transition support rises, thereby improving the movement stability and support reliability of the hydraulic support 1. At the same time, the above settings can, on the one hand, block flying objects to prevent them from flying into the support space of the hydraulic support 1, thus improving the safety of the staff's work; on the other hand, the blocking assembly 20 adjusts the blocking area of the blocking assembly 20 through the movement of the second blocking structure 22, so that when the second blocking structure 22 moves to the second blocking position, it can block flying objects in a larger area, expanding the blocking area of the blocking assembly 20, improving the protection performance of the hydraulic support 1, further improving the safety of the staff's work, and thus solving the problems in the prior art that the hydraulic support 1 is prone to jamming and has poor protection performance.

[0036] In this embodiment, a large number of hydraulic supports 1 are arranged side by side on the fully mechanized mining face. The first and second hydraulic supports 1 are end transition supports, and the third hydraulic support 1 is a vertical transition support.

[0037] Specifically, on the fully mechanized mining face with large mining height, the height of the vertical transition support is higher than that of the end transition support, so that during the processes of pulling and lifting of the vertical transition support, it will not move into the support space of the end transition support. However, during the processes of pulling and lifting of the end transition support, it will move into the support space of the vertical transition support, resulting in the phenomenon of "biting the support" between the end transition support and the vertical transition support when the end transition support rises.

[0038] Specifically, the limiting structure 10 is arranged on the vertical transition support and is located between the vertical transition support and the end transition support to prevent the end transition support from moving into the support space of the vertical transition support during the movement process, thereby improving the movement stability of the end transition support.

[0039] Specifically, the end transition support does not need to be provided with the limiting structure 10.

[0040] In this embodiment, the flying objects are the coal blocks squeezed and flown out during the occurrence of rib spalling phenomenon in the process of coal mining.

[0041] Specifically, the second blocking structure 22 moves towards the coal wall to expand the blocking area of the blocking assembly 20 and block the flying objects in a larger range.

[0042] As Figure 4 shown, the limiting structure 10 is in a plate shape. The plate surface of the limiting structure 10 away from the support space of the hydraulic support 1 is used for limiting and stopping against the adjacent hydraulic support 1. In this way, on the one hand, the above setting increases the contact area between the limiting structure 10 and the adjacent hydraulic support 1, avoids the adjacent hydraulic support 1 from disengaging from the limiting structure 10, improves the limiting reliability of the limiting structure 10, and also improves the movement stability of the hydraulic support 1; on the other hand, it enables the limiting structure 10 to block the flying objects, improves the versatility of the limiting structure 10, and further improves the protection performance of the hydraulic support 1.

[0043] As Figures 1 to 4 shown, the protection device further includes a driving structure 30. The driving structure 30 is drivingly connected to the second blocking structure 22, and the driving structure 30 is used to drive the second blocking structure 22 to move towards or away from the first blocking structure 21. In this way, the above setting improves the automation degree of the protection device, reduces the working difficulty of the staff, and improves the working efficiency of the staff.

[0044] As Figure 1As shown, the first blocking structure 21 is plate-shaped, and the protection device further includes a connecting member 40. The connecting member 40 is disposed on the limiting structure 10 and connected to the first blocking structure 21. The first blocking structure 21 is spaced apart from the limiting structure 10 through the connecting member 40. In this way, on the one hand, the connection between the limiting structure 10 and the blocking assembly 20 is realized through the connecting member 40; on the other hand, the connection area between the limiting structure 10 and the blocking assembly 20 is increased, further expanding the blocking area of the limiting structure 10 and the blocking assembly 20 for flying objects, and further improving the protection performance of the hydraulic support 1.

[0045] In this embodiment, the connecting member 40 is rod-shaped.

[0046] Optionally, one end of the connecting member 40 is connected to the limiting structure 10 by welding, and the other end of the connecting member 40 is connected to the first blocking structure 21 by welding.

[0047] As Figure 1 and Figure 2 shown, the second blocking structure 22 is plate-shaped, the driving structure 30 is a driving cylinder, the driving cylinder includes a cylinder block 31 and a piston rod 32, one of the cylinder block 31 and the piston rod 32 is disposed on the limiting structure 10, and the other of the cylinder block 31 and the piston rod 32 is connected to the second blocking structure 22. In this way, on the one hand, the driving cylinder provides a more stable and higher upper limit driving force for the second blocking structure 22, improving the reliability of the movement of the second blocking structure 22; on the other hand, it also makes the driving structure 30 simpler, and the driving of the second blocking structure 22 can be realized without using a transmission structure, reducing the operation cost of the protection device. At the same time, the above settings make the installation positions of the cylinder block 31 and the piston rod 32 more flexible and diverse to adapt to different working conditions and usage requirements, and also improve the processing flexibility of the staff.

[0048] Optionally, the driving cylinder is one of a pneumatic cylinder or a hydraulic cylinder.

[0049] Specifically, the protection device further includes a control module and a detection device. The detection device is disposed on the hydraulic support 1 and / or the limiting structure 10, and the detection device is used to detect whether there are flying objects in a preset area. Among them, the control module is connected to both the detection device and the driving structure 30, and the control module controls the piston rod 32 to extend or retract according to the detection value of the detection device. In this way, the above settings detect whether there are flying objects obliquely above the hydraulic support 1 through the detection device, so that the control module can control the driving of the driving structure 30 according to the detection result of the detection device, thereby realizing the automatic expansion and contraction of the second blocking structure 22, and also realizing the functions of real-time monitoring and real-time protection of the protection device, reducing the labor intensity of the staff, and improving the intelligent degree of the protection device.

[0050] In this embodiment, the detection device is infrared detection.

[0051] As Figures 1 to 3 shown, both the first blocking structure 21 and the second blocking structure 22 are plate-shaped, and first chamfers 211 are provided at at least some edges of the first blocking structure 21; and / or, second chamfers 221 are provided at at least some edges of the second blocking structure 22. In this way, the above settings improve the smoothness of the edges of the first blocking structure 21 and the second blocking structure 22, so as to avoid cutting the staff and improve the safety of the working environment of the staff.

[0052] In this embodiment, the first blocking structure 21 is arranged as a rectangular plate, and chamfers are provided at both right-angle sides of the first blocking structure 21 away from the limiting structure 10.

[0053] In this embodiment, the second blocking structure 22 is arranged as a rectangular plate, and chamfers are provided at both right-angle sides of the second blocking structure 22 away from the limiting structure 10.

[0054] In an embodiment not shown in the drawings, the protection device further includes a transmission assembly. The driving structure is drivingly connected to the second blocking structure. The transmission assembly includes a gear and a rack. The gear is sleeved on the output shaft of the driving structure. The rack is slidably arranged on the limiting structure and meshes with the gear, and one end of the rack is connected to the second blocking structure. In this way, the above settings make the transmission mode of the driving structure more flexible and diverse on the one hand, so as to adapt to different working conditions and usage requirements, and also improve the processing flexibility of the staff; on the other hand, the driving structure does not need to be provided with a supporting air supply device or oil supply device, thereby reducing the operating cost of the protection device.

[0055] Specifically, the driving structure is a motor.

[0056] Optionally, the protection device further includes a buffer structure. The buffer structure is arranged on the surface of the limiting structure 10 away from the hydraulic support 1; and / or, on the surface of the blocking assembly 20 away from the hydraulic support 1. In this way, the above settings buffer the flying objects through the buffer structure on the one hand, avoiding the direct contact between the flying objects and the limiting structure 10 and the blocking assembly 20, which may cause damage to the limiting structure 10 and the blocking assembly 20, and extending the service life of the limiting structure 10 and the blocking assembly 20; on the other hand, reducing the noise between the flying objects and the limiting structure 10 and the blocking assembly 20, and improving the comfort of the working environment of the staff.

[0057] In this embodiment, buffer structures are provided on both the limiting structure 10 and the blocking assembly 20.

[0058] Optionally, the buffer structure is one of a rubber pad, a foam pad, and a foam sponge.

[0059] The present utility model also provides a hydraulic support device, which includes a hydraulic support 1 and a protection device, and the protection device is the above-mentioned protection device.

[0060] From the above description, it can be seen that the above embodiments of the present utility model achieve the following technical effects:

[0061] The limiting structure of the protection device is arranged on the hydraulic support. The limiting structure is used for limiting and blocking with the hydraulic support adjacent to this hydraulic support, and at least part of the limiting structure is located between two adjacent hydraulic supports. The blocking assembly is arranged on the limiting structure and is used for blocking flying objects. The blocking assembly includes a first blocking structure and a second blocking structure, and the second blocking structure is movably arranged. Wherein, the second blocking structure has a first blocking position and a second blocking position. When the second blocking structure is in the first blocking position, the second blocking structure overlaps with at least part of the first blocking structure. When the second blocking structure is in the second blocking position, the second blocking structure moves away from the first blocking structure to adjust the blocking area of the blocking assembly. In this way, when the staff pulls and moves or raises and lowers the end transition support, the limiting structure arranged on the vertical transition support can contact the end transition support and limit and block the end transition support, avoiding the end transition support from shifting into the support space of the vertical transition support, which may cause the "biting support" phenomenon between the end transition support and the vertical transition support when the end transition support rises, thereby improving the movement stability and support reliability of the hydraulic support. At the same time, the above setting can, on the one hand, block flying objects to prevent flying objects from flying into the support space of the hydraulic support, thereby improving the safety of the staff during work; on the other hand, it enables the blocking assembly to adjust the blocking area of the blocking assembly through the movement of the second blocking structure, so that when the second blocking structure moves to the second blocking position, it can block flying objects in a larger area, expanding the blocking area of the blocking assembly, improving the protection performance of the hydraulic support, further improving the safety of the staff during work, and thus solving the problems that the hydraulic support in the prior art is prone to the "biting support" phenomenon and has poor protection performance.

[0062] Obviously, the above-described embodiments are only a part of the embodiments of the present utility model, rather than all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present utility model.

[0063] 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.

[0064] It should be noted that the terms "first", "second", etc. in the description, claims and the above-mentioned drawings of this application are used to distinguish similar objects, and do not necessarily have to be used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances so that the embodiments of the present application described here can be implemented in an order other than those illustrated or described here.

[0065] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. For those skilled in the art, the present utility model can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A protective device, characterized in that: The protective equipment includes: A limiting structure (10) is arranged on the hydraulic support (1), the limiting structure (10) being used to limit and stop the hydraulic support (1) adjacent to the hydraulic support (1), and at least part of the limiting structure (10) is located between two adjacent hydraulic supports (1); A blocking assembly (20) is arranged on the limiting structure (10) and is used to block falling objects, the blocking assembly (20) comprising a first blocking structure (21) and a second blocking structure (22), the second blocking structure (22) being movably arranged; The second blocking structure (22) has a first blocking position and a second blocking position. When the second blocking structure (22) is in the first blocking position, the second blocking structure (22) overlaps with at least a portion of the first blocking structure (21). When the second blocking structure (22) is in the second blocking position, the second blocking structure (22) moves away from the first blocking structure (21) to adjust the blocking area of ​​the blocking assembly (20).

2. The protective device according to claim 1, characterized in that: The limiting structure (10) is in the shape of a plate, and the plate surface of the limiting structure (10) away from the supporting space of the hydraulic support (1) is used for limiting and stopping with an adjacent hydraulic support (1).

3. The protective device according to claim 1, characterized in that: The protective device also includes: A driving structure (30) is drivingly connected to the second blocking structure (22), and the driving structure (30) is used to drive the second blocking structure (22) to move toward or away from the first blocking structure (21).

4. The protection device according to claim 1, characterized in that: The first blocking structure (21) is in the shape of a plate, and the protective device further comprises: A connecting member (40) is arranged on the limiting structure (10) and connected to the first blocking structure (21); the first blocking structure (21) is spaced apart from the limiting structure (10) by the connecting member (40).

5. The protection device according to claim 3, characterized in that: The second blocking structure (22) is in the shape of a plate, the driving structure (30) is a driving cylinder, the driving cylinder comprises a cylinder body (31) and a piston rod (32), one of the cylinder body (31) and the piston rod (32) is arranged on the limiting structure (10), and the other of the cylinder body (31) and the piston rod (32) is connected to the second blocking structure (22).

6. The protection device according to claim 5, characterized in that: The protective device also includes: Control module; a detection device, arranged on the hydraulic support (1) and / or the limiting structure (10), the detection device being used to detect whether there are falling objects in a preset area; The control module is connected to both the detection device and the drive structure (30), and the control module controls the piston rod (32) to extend or retract according to the detection value of the detection device.

7. The protection device according to claim 3, characterized in that: The first blocking structure (21) and the second blocking structure (22) are both in the shape of a plate. At least part of the edges of the first blocking structure (21) are provided with a first chamfer (211); and / or, At least part of the edges of the second blocking structure (22) are provided with a second chamfer (221).

8. The protection device according to claim 3, characterized in that: The protective device further comprises a transmission assembly, wherein the driving structure (30) is drivingly connected to the second blocking structure (22), and the transmission assembly comprises: A gear, sleeved on an output shaft on the driving structure (30); A rack is slidably disposed on the limiting structure (10) and meshes with the gear, and one end of the rack is connected to the second blocking structure (22).

9. The protection device according to claim 2, characterized in that: The protective device also includes: A buffer structure, wherein the buffer structure is arranged on a plate surface of the limiting structure (10) away from the hydraulic support (1); and / or the blocking component (20) is arranged on a plate surface away from the hydraulic support (1).

10. A hydraulic support device, characterized in that: The hydraulic support equipment comprises a hydraulic support (1) and a protective device, wherein the hydraulic support (1) is the protective device according to any one of claims 1 to 9.

Images