CN214837491U - Hydraulic cylinder limiting device and heading machine - Google Patents
Hydraulic cylinder limiting device and heading machine Download PDFInfo
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- CN214837491U CN214837491U CN202121202459.1U CN202121202459U CN214837491U CN 214837491 U CN214837491 U CN 214837491U CN 202121202459 U CN202121202459 U CN 202121202459U CN 214837491 U CN214837491 U CN 214837491U
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Abstract
The utility model discloses a pneumatic cylinder stop device and entry driving machine relates to mining equipment technical field, and the main objective is to avoid the entry driving machine when shutting down maintenance, and pneumatic cylinder piston rod stroke falls back and causes personnel's damage to improve the operation security. The hydraulic cylinder limiting device comprises a first limiting part; the second spacing portion, the second spacing portion with first spacing portion sets up relatively and can dismantle the connection, just first spacing portion with be formed with both ends open-ended between the spacing portion of second and hold the chamber, it is used for holding to hold the chamber the piston rod of pneumatic cylinder.
Description
Technical Field
The utility model belongs to the technical field of mining equipment technique and specifically relates to a pneumatic cylinder stop device and entry driving machine are related to.
Background
The heading machine is a machine for cutting a roadway on a flat ground, can be used for various working conditions such as coal petrography, hard rock, tunnel, and can realize the lifting of a cutting part by an oil cylinder, the left and right rotation of a rotary part, the lifting of a shovel plate, the stretching and other actions of a back support, and the oil cylinders for realizing the actions usually and completely depend on a limit sensor for limiting.
Then, after the limit sensor is used for a long time, dangerous conditions of sensitivity reduction and even failure are easy to occur, so that the situation that when the machine is shut down for maintenance, maintenance and overhaul, the stroke of a piston rod of the hydraulic cylinder falls back due to abnormal conditions such as oil pressure leakage of the oil cylinder and damage of the piston rod causes sudden falling of a cutting part and the like to damage operators is easy to occur, and the operation safety is reduced.
SUMMERY OF THE UTILITY MODEL
In view of this, the embodiment of the utility model provides a pneumatic cylinder stop device and entry driving machine, the main objective is when avoiding the entry driving machine to shut down maintenance, the hydraulic cylinder piston rod stroke falls back and causes personnel's damage to improve the operation security.
In order to achieve the above object, the embodiment of the present invention mainly provides the following technical solutions:
on the one hand, the embodiment of the utility model provides a pneumatic cylinder stop device is provided, include:
a first limiting part;
the second limiting part is arranged oppositely to the first limiting part and detachably connected with the first limiting part, a containing cavity with two open ends is formed between the first limiting part and the second limiting part, and the containing cavity is used for containing a piston rod of the hydraulic cylinder.
Further, first spacing portion with the spacing portion of second all includes the plate body of semicircle arcuation, just first spacing portion with the relative lock setting of the spacing portion of second forms the barrel, it does to hold the chamber the inner chamber of barrel.
Further, the outer diameter of the cylinder body is smaller than or equal to the outer diameter of the screw gland of the hydraulic cylinder, and the inner diameter of the cylinder body is larger than the inner diameter of the screw gland of the hydraulic cylinder.
Furthermore, the first limiting part and the second limiting part further comprise protective layers correspondingly arranged on the inner surfaces of the first limiting part and the second limiting part, and the protective layers are in clearance fit with the piston rod.
Further, the protective layer is a polytetrafluoroethylene layer.
Further, the protective layer comprises at least two protective layer sections, and the at least two protective layer sections are sequentially arranged at intervals along the axial direction of the accommodating cavity.
Further, the axial end face of the first limiting part exceeds the corresponding side end face of the protective layer segment; or the axial end face of the first limiting part is flush with the corresponding side end face of the protective layer section;
the axial end face of the second limiting part exceeds the corresponding side end face of the protective layer section; or the axial end face of the second limiting part is flush with the corresponding side end face of the protective layer section;
furthermore, the end face of the protective layer section of the first limiting part is flush with the end face of the corresponding side of the first limiting part; the end face of the protective layer section of the second limiting part is flush with the end face of the corresponding side of the second limiting part.
Further, hydraulic cylinder stop device still include:
the first mounting hole is arranged on the first limiting part;
the second mounting hole is formed in the second limiting part;
a fastener through which the first mounting hole and the second mounting hole are connected.
On the other hand, the embodiment of the utility model provides a still provide a heading machine, include:
the hydraulic cylinder, the mounting structural part which is rotationally connected with a piston rod of the hydraulic cylinder and the hydraulic cylinder limiting device are arranged on the hydraulic cylinder;
the hydraulic cylinder comprises a threaded gland;
the piston rod penetrates through the accommodating cavity, and the first limiting portion and the second limiting portion are located between the threaded gland and the mounting structural member.
Borrow by above-mentioned technical scheme, the utility model discloses following beneficial effect has at least:
the technical proposal provided by the embodiment of the utility model can firstly place the first limit part at the front end of the piston rod of the hydraulic cylinder when the heading machine is stopped for maintenance, maintenance and overhaul, and then connect the second limit part with the first limit part, so that the first limit part and the second limit part are sleeved outside the piston rod through the containing cavity, because one end of the first limit part and the second limit part can be contacted with the end surface of the screw gland of the hydraulic cylinder, and the other end of the first limit part and the second limit part can be contacted with the end surface of the mounting structural member at the end of the head pin shaft of the piston rod, the first limit part and the second limit part can limit the stroke of the piston rod, therefore, in the maintenance, the maintenance and the overhaul processes, the accidental situations such as oil pressure leakage of the oil cylinder can occur instantly, the piston rod of the hydraulic cylinder can not fall back due to the limit action of the first limit part and the second limit part, the cutting part and the like are prevented from falling suddenly to damage operators, and the operation safety is improved. In addition, first spacing portion can be dismantled with the spacing portion of second and be connected, and this pneumatic cylinder stop device of being convenient for installs and dismantles on the pneumatic cylinder, and replacement nature and maintainability are stronger.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:
fig. 1 is a schematic structural view of a hydraulic cylinder limiting device according to an embodiment of the present invention;
fig. 2 is an exploded view of a hydraulic cylinder limiting device according to an embodiment of the present invention;
fig. 3 is a schematic end-face structure view of a hydraulic cylinder limiting device according to an embodiment of the present invention;
fig. 4 is a schematic structural view of the hydraulic cylinder limiting device provided by the embodiment of the present invention installed in the hydraulic cylinder.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions in the embodiments of the present invention will be described in more detail below with reference to the drawings in the preferred embodiments of the present invention. In the drawings, the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The described embodiments are only some, but not all embodiments of the invention. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention. Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. In the description of the present embodiment, it is to be understood that the terms "center", "longitudinal", "lateral", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and therefore, should not be construed as limiting the scope of the present embodiment.
As shown in fig. 1, fig. 2 and fig. 3, an embodiment of the present invention provides a hydraulic cylinder limiting device, which includes a first limiting portion 1; the spacing portion 2 of second, this spacing portion 2 of second and first spacing portion 1 set up relatively and can dismantle the connection, are formed with both ends open-ended between first spacing portion 1 and the spacing portion 2 of second and hold chamber 3, should hold chamber 3 and be used for holding the piston rod 41 of pneumatic cylinder 4.
The embodiment of the utility model provides a pneumatic cylinder stop device, when the entry driving machine is shut down and is maintained, the maintenance, when overhauing, can place first spacing portion 1 at the piston rod 41 front end of pneumatic cylinder 4 earlier, then be connected spacing portion 2 of second and first spacing portion 1, make first spacing portion 1 and the spacing portion 2 of second cup joint in piston rod 41's outside through holding chamber 3, because the end face contact of the screw gland of first spacing portion 1 and the spacing portion 2 of second can with pneumatic cylinder 4, the other end of first spacing portion 1 and the spacing portion 2 of second can with the end face contact of the 41 first round pin axle head of piston rod end installation structure spare, make first spacing portion 1 and the spacing portion 2 of second can carry out spacingly to the stroke of piston rod 41, consequently, the maintenance in-process, unexpected situations such as the hydro-cylinder oil pressure is revealed immediately take place, the piston rod 41 of pneumatic cylinder 4 also can not take place to go because of the limiting displacement of first spacing portion 1 and the spacing effect of the spacing portion 2 of second The process falls back, the cutting part and the like are prevented from falling suddenly to damage operators, and the operation safety is improved. In addition, first spacing portion 1 can be dismantled with spacing portion 2 of second and be connected, and this pneumatic cylinder stop device of being convenient for is installed and is dismantled on pneumatic cylinder 4, and replacement nature and maintainability are stronger.
In an alternative embodiment, referring to fig. 1, fig. 2 and fig. 3, both the first position-limiting portion 1 and the second position-limiting portion 2 may be semi-arc-shaped plate bodies, specifically steel plate bodies, and the first position-limiting portion 1 and the second position-limiting portion 2 are oppositely buckled. In this embodiment, all set up first spacing portion 1 and the spacing portion 2 of second into semicircle arcuation plate body for can constitute the ring form structure after the two lock, improve this hydraulic pressure stop device's intensity, thereby make this pneumatic cylinder stop device be difficult for taking place to warp, can bear great load, and then can be adapted to heavy load mechanical working condition well.
It should be noted that, in the hydraulic cylinder limiting device, the first limiting part 1 and the second limiting part 2 may be formed by modifying a steel pipe with sufficient strength and an appropriate inner and outer diameter, so that the manufacturing cost of the hydraulic cylinder limiting device is reduced better.
In order to avoid the situation that the piston rod 41 of the hydraulic cylinder 4 is scratched and worn, referring to fig. 1, fig. 2 and fig. 3, in an alternative embodiment, protective layers may be disposed on the inner surfaces of the first limiting portion 1 and the second limiting portion 2, so that the accommodating cavity 3 is in contact with the piston rod 41 of the hydraulic cylinder 4 through the protective layers, thereby preventing the metal structure from being in direct contact with the piston rod 41 of the hydraulic cylinder 4, further preventing the metal structure from being in direct contact with the piston rod 41 to scratch and wear the piston rod 41, and ensuring the normal operation of the hydraulic cylinder 4.
Specifically, the protective layer can adopt low hardness material such as polytetrafluoroethylene material, because polytetrafluoroethylene material has certain plastic deformability, so it can avoid the piston rod 41 of pneumatic cylinder 4 because of contacting the too big material of hardness and by fish tail and wearing and tearing well, has guaranteed the normal work of pneumatic cylinder 4 better. In addition, the protective layer can be connected with the first limiting part 1 or the second limiting part 2 in a bolt combining mode.
In an alternative embodiment, referring to fig. 1, 2 and 3, the protective layer may include at least two protective layer segments 5, and the at least two protective layer segments 5 are sequentially spaced along the axial direction of the accommodating cavity 3. Specifically, when the number of the protective layer segments 5 is two, the two protective layer segments 5 may be respectively located at two end positions of the first limiting portion 1 or the second limiting portion 2. In this embodiment, the protective layer is not disposed to cover the inner surface of the first limiting portion 1 or the second limiting portion 2, which is enough to ensure that the accommodating chamber 3 contacts the piston rod 41 of the hydraulic cylinder 4 through the at least two protective layer sections 5, and can also prevent the piston rod 41 from being scratched and worn, and can also reduce the cost well.
In an alternative embodiment, referring to fig. 1 and 3, the protective layer section 5 on the first position-limiting part 1 and the protective layer section 5 on the second position-limiting part 2 are correspondingly arranged, so that the first position-limiting part 1 and the second position-limiting part 2 can stably contact with the piston rod 41 of the hydraulic cylinder 4 through the protective layer. In addition, the end of the protective layer segment 5 may extend to the side end of the first limiting part 1 or the second limiting part 2, and the end surface of the protective layer segment 5 may be flush with the corresponding side end surface of the first limiting part 1 or the second limiting part 2, so that the two corresponding protective layer segments 5 on the first limiting part 1 and the second limiting part 2 may contact to form an annular body, so that the accommodating cavity 3 better and more stably contacts with the piston rod 41 through the protective layer, thereby better avoiding the piston rod 41 from being scratched and worn.
In order to further facilitate the disassembly and assembly of the hydraulic cylinder limiting device, in an alternative embodiment, referring to fig. 1, fig. 2 and fig. 3, the outer surfaces of the first limiting portion 1 and the second limiting portion 2 may be provided with a handle 6, so that an operator can hold the handle 6 to take the first limiting portion 1 or the second limiting portion 2 when disassembling and assembling the limiting device, and the disassembly and assembly are more convenient.
Specifically, referring to fig. 1, 2 and 3, the handle 6 may be U-shaped, two ends of the handle 6 are connected to the first limiting portion 1 or the second limiting portion 2, and the handle 6 is disposed along the axial extension of the accommodating cavity 3, so that an operator can hold the handle 6 during the dismounting operation, thereby further improving the dismounting convenience.
Wherein, the first spacing portion 1 can have a plurality of with the spacing connection mode of dismantling of second 2, in order to ensure this pneumatic cylinder stop device's joint strength, in the embodiment of the utility model, see fig. 1, fig. 2 and fig. 3, this pneumatic cylinder stop device still including set up in first mounting hole 11 of first spacing portion 1, set up the second mounting hole 21 on spacing portion 2 of second to and connect fastener 7 of first mounting hole 11 and second mounting hole 21.
In the above embodiment, the two side ends of the first limiting part 1 are both provided with first mounting holes 11, the first mounting holes 11 are counter bores, and the number of the first mounting holes 11 is at least two, and the first mounting holes 11 are arranged at intervals along the length direction of the first limiting part 1; correspondingly, both sides tip at the spacing portion 2 of second all is provided with second mounting hole 21, and this second mounting hole 21's quantity is at least two, and sets up along the length direction interval of the spacing portion 2 of second to with 11 one-to-one in at least two first mounting holes, and fastener 7 includes two at least bolts, nut and shim pack, so that bolt, nut and shim pack are connected first mounting hole 11 and second mounting hole 21, guaranteed this pneumatic cylinder stop device's joint strength, and simple structure, the cost is lower.
The embodiment of the utility model also provides a heading machine, refer to fig. 4, and combine fig. 1, fig. 2 and fig. 3, including pneumatic cylinder 4, the installation structure spare of being connected with the piston rod 41 rotation of pneumatic cylinder 4 and the aforesaid pneumatic cylinder stop device; the mounting structure is connected with components of the heading machine such as the cutting part, for example, the mounting structure can be a connecting lug which is hinged with a piston rod 41 of the hydraulic cylinder 4, the connecting lug can be arranged on the cutting part, the rear supporting part or the first conveyor, and the hydraulic cylinder 4 comprises a screw gland 42; the piston rod 41 of the hydraulic cylinder 4 penetrates through the accommodating cavity 3, one ends of the first limiting part 1 and the second limiting part 2 are abutted to the screw gland 42, and the other ends of the first limiting part 1 and the second limiting part 2 are abutted to the mounting structural member.
The embodiment of the utility model provides a heading machine, including the pneumatic cylinder stop device, when the heading machine stops to maintain, overhaul, can be first place first spacing portion 1 in the front end of piston rod 41 of pneumatic cylinder 4, then connect second spacing portion 2 with first spacing portion 1, make first spacing portion 1 and second spacing portion 2 cup joint the outside at piston rod 41 through holding chamber 3, because one end of first spacing portion 1 and second spacing portion 2 can be with the terminal surface contact of screw gland 42 of pneumatic cylinder 4, the other end of first spacing portion 1 and second spacing portion 2 can be with the terminal surface contact of the first round pin axle end mounting structure of piston rod 41, make first spacing portion 1 and second spacing portion 2 can carry out the spacing to the stroke of piston rod 41, therefore in the maintenance, in-process, unexpected situations such as the oil pressure leakage of the hydro-cylinder take place promptly, the piston rod 41 of the hydraulic cylinder 4 can not fall back due to the limiting action of the first limiting part 1 and the second limiting part 2, the cutting part and the like are prevented from falling suddenly to damage operators, and the operation safety is improved. In addition, first spacing portion 1 can be dismantled with spacing portion 2 of second and be connected, and this pneumatic cylinder stop device of being convenient for is installed and is dismantled on pneumatic cylinder 4, and replacement nature and maintainability are stronger.
In an optional embodiment, the first position-limiting portion 1 and the second position-limiting portion 2 may be both semi-arc-shaped plates, and the first position-limiting portion 1 and the second position-limiting portion 2 are relatively buckled to form a cylinder; the outer diameter of the cylinder is less than or equal to the outer diameter of the screw gland 42, and the inner diameter of the cylinder is greater than the inner diameter of the screw gland 42.
In the above embodiment, because the guide sleeve is arranged inside the screw gland 42 of the hydraulic cylinder 4, and the strength of the guide sleeve is low, and the guide sleeve cannot bear load, therefore, the outer diameter of the cylinder body is set to be less than or equal to the outer diameter of the screw gland 42, and the inner diameter of the cylinder body is set to be greater than the inner diameter of the screw gland 42, so that the load of the hydraulic cylinder limiting device is completely loaded on the screw gland 42 with high strength, thereby not only avoiding the damage of the guide sleeve, but also ensuring the limiting effect of the hydraulic cylinder limiting device.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.
Claims (10)
1. A hydraulic cylinder stop device, its characterized in that includes:
a first limiting part;
the second limiting part is arranged oppositely to the first limiting part and detachably connected with the first limiting part, a containing cavity with two open ends is formed between the first limiting part and the second limiting part, and the containing cavity is used for containing a piston rod of the hydraulic cylinder.
2. Hydraulic cylinder stop device according to claim 1,
the first limiting part and the second limiting part comprise semi-arc-shaped plate bodies, the first limiting part and the second limiting part are oppositely buckled to form a barrel, and the accommodating cavity is an inner cavity of the barrel.
3. Hydraulic cylinder stop device according to claim 2,
the outer diameter of the cylinder body is smaller than or equal to the outer diameter of the screw gland of the hydraulic cylinder, and the inner diameter of the cylinder body is larger than the inner diameter of the screw gland of the hydraulic cylinder.
4. Hydraulic cylinder stop device according to claim 2,
the first limiting portion and the second limiting portion further comprise protective layers correspondingly arranged on the inner surfaces of the first limiting portion and the second limiting portion, and the protective layers are in clearance fit with the piston rod.
5. Hydraulic cylinder stop device according to claim 4,
the protective layer is a polytetrafluoroethylene layer.
6. Hydraulic cylinder stop device according to claim 4,
the protective layer comprises at least two protective layer sections which are sequentially arranged at intervals along the axial direction of the accommodating cavity.
7. Hydraulic cylinder stop device according to claim 6,
the axial end face of the first limiting part exceeds the corresponding side end face of the protective layer section; or the axial end face of the first limiting part is flush with the corresponding side end face of the protective layer section;
the axial end face of the second limiting part exceeds the corresponding side end face of the protective layer section; or the axial end face of the second limiting part is flush with the corresponding side end face of the protective layer section.
8. Hydraulic cylinder stop device according to claim 6,
the end surface of the protective layer section of the first limiting part is flush with the end surface of the corresponding side of the first limiting part; the end face of the protective layer section of the second limiting part is flush with the end face of the corresponding side of the second limiting part.
9. The hydraulic cylinder stop device of claim 1, further comprising:
the first mounting hole is arranged on the first limiting part;
the second mounting hole is formed in the second limiting part;
a fastener through which the first mounting hole and the second mounting hole are connected.
10. A heading machine, comprising:
a hydraulic cylinder, a mounting structure rotatably connected to a piston rod of the hydraulic cylinder, and a hydraulic cylinder positioning device according to any one of claims 1 to 9;
the hydraulic cylinder comprises a threaded gland;
the piston rod penetrates through the accommodating cavity, and the first limiting portion and the second limiting portion are located between the threaded gland and the mounting structural member.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121202459.1U CN214837491U (en) | 2021-05-31 | 2021-05-31 | Hydraulic cylinder limiting device and heading machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121202459.1U CN214837491U (en) | 2021-05-31 | 2021-05-31 | Hydraulic cylinder limiting device and heading machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214837491U true CN214837491U (en) | 2021-11-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121202459.1U Active CN214837491U (en) | 2021-05-31 | 2021-05-31 | Hydraulic cylinder limiting device and heading machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214837491U (en) |
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2021
- 2021-05-31 CN CN202121202459.1U patent/CN214837491U/en active Active
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