CN219282144U - Cylinder - Google Patents

Abstract

The utility model belongs to the technical field of pneumatic elements, and discloses a cylinder, which comprises a cylinder body, an end cover and a piston rod, wherein the end cover is in threaded connection with one end of the cylinder body and is positioned in the cylinder body, the end cover and the cylinder body are coaxially arranged, the cylinder body and the end cover are sleeved on the periphery of the piston rod, the piston rod can move along the axis of the piston rod and can extend out of the cylinder body and the end cover, the end cover is configured to guide the piston rod to rotate around the axis of the piston rod when the piston rod moves along the axis of the piston rod, the end cover is positioned at one end outside the cylinder body and is provided with a clamping part, and the cylinder also comprises a clamping piece which is fixedly connected with the cylinder body and sleeved on the periphery of the clamping part so as to limit the relative rotation of the cylinder body and the end cover, thereby ensuring that the end cover cannot rotate around the axis of the piston rod even when looseness is generated between the end cover and the cylinder body, and further avoiding influencing the accuracy of the rotation driving of the cylinder.

Description

Cylinder

Technical Field

The utility model relates to the technical field of pneumatic elements, in particular to a cylinder.

Background

The cylinder is usually a cylindrical metal part for guiding the piston to perform linear reciprocating motion in the cylinder, namely the cylinder in the prior art is usually a cylinder with a piston rod controlled by air pressure to move along a linear direction, so that the aim of linear driving is fulfilled. But some special occasions need to realize the linear drive except that still need realize rotary drive simultaneously, for this, provide a cylinder in the prior art, this cylinder includes cylinder body, piston rod and end cover, and the end cover spiro union is inside the cylinder body, is provided with the helicla flute on the piston rod, and the helicla flute extends around the axis spiral of piston rod, is provided with the bolt on the end cover, and the bolt stretches into in the helicla flute, when the piston rod moves along the straight line direction, under the effect of bolt, the piston rod can rotate around its axis to realize the complex of linear drive and rotary drive.

However, after the cylinder is used for a long time, looseness is easy to occur between the end cover and the cylinder body, and at the moment, when the piston rod moves in the straight line direction, the bolt is stressed to easily enable the end cover to rotate around the axis of the end cover, so that the accuracy of rotation driving is affected and is reduced.

Therefore, the above-described problems are to be solved.

Disclosure of Invention

The utility model aims to provide a cylinder, which solves the problem that after the cylinder is used for a long time, looseness is easy to occur between an end cover and a cylinder body, and at the moment, when a piston rod moves in a straight line direction, a bolt is stressed to easily enable the end cover to rotate around the axis of the end cover, so that the accuracy of rotation driving is affected to be reduced.

To achieve the purpose, the utility model adopts the following technical scheme:

the utility model provides a cylinder, includes cylinder body, end cover and piston rod, the end cover spiro union in the one end of cylinder body is located the inside of cylinder body, the end cover with the coaxial setting of cylinder body, the cylinder body with the periphery of piston rod is all overlapped to the end cover, the piston rod can follow its axis and remove and can stretch out the cylinder body with the end cover, the end cover is configured to guide when the piston rod moves along its axis the piston rod is rotatory around its axis, the end cover is located the outside one end of cylinder body is provided with joint portion, the cylinder still includes the joint piece, joint piece fixed connection in the cylinder body is located in the periphery of joint portion, in order to restrict the cylinder body with the end cover relative rotation.

Preferably, the contour of the outer periphery of the clamping portion is non-circular, and the contour of the inner ring of the clamping piece is matched with the contour of the outer periphery of the clamping portion.

Preferably, the profile of the periphery of the clamping portion comprises a first edge, two ends of the first edge are respectively provided with a second edge and a third edge, and the second edge and the third edge are respectively arranged at an included angle with the first edge.

Preferably, the contour of the outer periphery of the clamping portion includes at least two first edges.

Preferably, the end of the end cover is screw-connected with the cylinder body, a first half groove is formed in the end of the end cover, the first half groove is formed from the end of the cylinder body to the inside of the cylinder body along the axial direction of the cylinder body, a second half groove is formed in the end cover, when the cylinder body and the end cover are in a screw-connected state, the first half groove and the second half groove jointly form an inserting hole extending along the axial direction of the cylinder body, and a pin is inserted in the inserting hole.

Preferably, the cross section of the insertion hole is circular.

Preferably, at least two insertion holes are formed between the cylinder and the end cover.

Preferably, the engaging piece covers the insertion hole.

Preferably, the clamping piece is bolted and fixed with the cylinder body through a bolt, the clamping part is provided with a first cambered surface which is concave inwards, and the first cambered surface is in clearance fit with the head of the bolt.

Preferably, the clamping portion is further provided with a second concave cambered surface, the first cambered surface and the second cambered surface are both provided with the bolts, and the first cambered surface and the second cambered surface are both in clearance fit with the heads of the bolts.

The utility model has the beneficial effects that: according to the utility model, the clamping piece can limit the end cover, so that the end cover cannot rotate around the axis of the end cover even when looseness occurs between the end cover and the cylinder body, and further the influence on the accuracy of the rotation driving of the cylinder is avoided.

Drawings

Fig. 1 is a schematic view of a cylinder in an embodiment of the present utility model;

FIG. 2 is a top view of a cylinder in an embodiment of the utility model;

FIG. 3 is a cross-sectional view taken along line A-A of FIG. 2;

FIG. 4 is a top view of the cylinder of the present utility model except for the clamping piece;

fig. 5 is a schematic structural view of a piston rod in an embodiment of the present utility model.

In the figure:

1. a cylinder; 11. a first half-groove; 12. an air inlet; 13. an air outlet; 14. a mounting groove;

2. an end cap; 21. a clamping part; 211. a first edge; 212. a second edge; 213. a third edge; 214. a first cambered surface; 215. a second cambered surface; 22. a second half-groove; 23. a plug pin;

3. a piston rod; 31. a first helical groove; 32. a second helical groove; 33. a first shoulder; 34. a second shoulder;

4. a clamping piece; 41. a bolt;

5. a spring;

6. a seal ring;

71. a magnet; 72. and (5) installing a sleeve.

Detailed Description

The utility model is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the utility model and are not limiting thereof. It should be further noted that, for convenience of description, only some, but not all of the structures related to the present utility model are shown in the drawings.

In the description of the present utility model, unless explicitly stated and limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

In the present utility model, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "left", "right", and the like are orientation or positional relationships based on those shown in the drawings, merely for convenience of description and simplicity of operation, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the utility model. Furthermore, the terms "first," "second," and the like, are used merely for distinguishing between descriptions and not for distinguishing between them.

Referring to fig. 1 to 5, the present embodiment provides a cylinder, the cylinder includes a cylinder body 1, an end cap 2 and a piston rod 3, one end of the cylinder body 1 is provided with an opening (not shown in the figure), the end cap 2 is screwed to one end of the cylinder body 1 and located inside the cylinder body 1, the end cap 2 is coaxially disposed with the cylinder body 1, the cylinder body 1 and the end cap 2 are both sleeved on the periphery of the piston rod 3, the piston rod 3 can move along the axis thereof and can extend out of the cylinder body 1 and the end cap 2, the end cap 2 is configured to guide the piston rod 3 to rotate around the axis thereof when the piston rod 3 moves along the axis thereof, specifically, one end of the piston rod 3 passes through the end cap 2 and extends out of the opening, the cylinder body 1 is provided with an air inlet 12, the air inlet 12 is communicated with an air inlet cavity (not shown in the figure) formed between the other end of the piston rod 3 and the inner wall of the cylinder body 1, thereby increasing air pressure in the air inlet cavity to push the piston rod 3 to move outside the cylinder body 1, a first helical groove 31 is opened on the piston rod 3, the first helical groove 31 is helically extended around the axis of the piston rod 3, the end cap 2 is mounted 23, the piston rod 3 is 23 is protruded around the axis of the piston rod 3, the first helical groove 31 is axially extended, and the piston rod 3 is driven to move linearly, when the first helical groove is driven to move linearly, and the piston rod 3 is driven to move.

Based on the above, the end cover 2 in this embodiment is provided with the clamping portion 21 at one end outside the cylinder 1, and the cylinder further includes the clamping piece 4, where the clamping piece 4 is fixedly connected to the cylinder 1 and sleeved on the periphery of the clamping portion 21, so as to limit the relative rotation between the cylinder 1 and the end cover 2.

In this embodiment, the clamping piece 4 can limit the end cover 2, so that even when looseness is generated between the end cover 2 and the cylinder body 1, the end cover 2 cannot rotate around the axis of the end cover 2, and further the accuracy of cylinder rotation driving is prevented from being affected.

Preferably, the contour of the outer periphery of the clamping portion 21 is in a non-circular shape, the contour of the inner ring of the clamping piece 4 is matched with the contour of the outer periphery of the clamping portion 21, namely, the inner ring of the clamping piece 4 sleeved on the outer periphery of the clamping portion 21 is a profiling hole referring to the contour of the outer periphery of the clamping portion 21, the inner wall of the clamping portion 21 can be attached to the outer wall of the clamping portion 21, so that the clamping piece 4 sleeved on the outer periphery of the clamping portion 21 can clamp the clamping portion 21 to limit the clamping portion 21, and when the cylinder is loosened due to long-term use, in the process of moving the piston rod 3 along a straight line, even if the bolt 23 is stressed and actuates the end cover 2, the end cover 2 cannot rotate around the axis of the bolt, thereby ensuring that the rotation precision of the piston rod 3 is not affected, and further avoiding affecting the precision of the rotation driving of the cylinder.

Based on the above, the outline of the periphery of the clamping portion 21 in this embodiment includes the first edge 211, the two ends of the first edge 211 are respectively provided with the second edge 212 and the third edge 213, the second edge 212 and the third edge 213 are all arranged at an included angle with the first edge 211, and because an included angle is formed between the first edge 211 and the second edge 212 and between the first edge 211 and the third edge 213, the clamping piece 4 sleeved on the periphery of the clamping portion 21 can be clamped with the clamping portion 21 so as to limit the clamping portion 21, and the structure for limiting the relative rotation of the cylinder 1 and the end cover 2 in this embodiment is simple.

Preferably, the clamping piece 4 is bolted and fixed with the cylinder body 1 through the bolt 41, the axis of the bolt 41 is parallel to the axis of the piston rod 3, the clamping piece 4 can be fixedly connected with the cylinder body 1 through the bolt 41, thereby avoid the looseness generated between the clamping piece 4 and the cylinder body 1 after the long-time use of the cylinder, further avoid influencing the precision of the cylinder rotation driving, the clamping part 21 is provided with a first cambered surface 214 which is concave, the first cambered surface 214 is in clearance fit with the head of the bolt 41, specifically, in the embodiment, a first cambered surface 214 is formed between the first edge 211 and the second edge 212, the first cambered surface 214 surrounds the periphery of the head of the bolt 41, namely, the bolt 41 can provide a positioning function for the installation of the clamping piece 4, and meanwhile, the bolt 41 can limit the rotation of the clamping piece 4 around the axis of the piston rod 3, thereby further avoiding influencing the precision of the cylinder rotation driving.

Further, the clamping portion 21 is further provided with a second cambered surface 215 which is concave, bolts 41 are arranged at the positions of the first cambered surface 214 and the second cambered surface 215, the first cambered surface 214 and the second cambered surface 215 are in clearance fit with the heads of the bolts 41, specifically, the second cambered surface 215 is formed between the first edge 211 and the third edge 213, and the bolts 41 are arranged at the positions of the first cambered surface 214 and the second cambered surface 215, namely, the clamping piece 4 can be fixedly connected with the cylinder body 1 through the two bolts 41, so that looseness is generated between the clamping piece 4 and the cylinder body 1 after the cylinder is used for a long time is further avoided, and the accuracy of cylinder rotation driving is further prevented from being influenced. In addition, the two bolts 41 can further restrict the rotation of the engagement piece 4 about the axis of the piston rod 3, thereby further avoiding affecting the accuracy of the cylinder rotation driving.

Further, the outline of the outer periphery of the clamping portion 21 in this embodiment includes at least two first edges 211, so as to increase the number of corners on the clamping portion 21, so as to improve the clamping limiting effect of the clamping piece 4 on the clamping portion 21, thereby further ensuring that the latch 23 cannot actuate the end cover 2, so as to further avoid affecting the accuracy of the cylinder rotation driving.

Specifically, two first edges 211 are disposed on the clamping portion 21 in the embodiment, the two first edges 211 are disposed in parallel, a second edge 212 and a third edge 213 are disposed between the two first edges 211, and the second edge 212 and the third edge 213 are disposed in parallel, that is, two ends of the second edge 212 and two ends of the third edge 213 are disposed respectively near the two first edges 211, so as to improve the clamping limiting effect of the clamping piece 4 on the clamping portion 21. Of course, in other alternative embodiments, other numbers of first edges 211 may be disposed on the clamping portion 21, and any two first edges 211 may be disposed at an included angle, which is not specifically limited in this embodiment.

Based on the above, since the two first edges 211 are disposed on the clamping portion 21 in the present embodiment, the two first edges 211 are disposed in parallel, the second edges 212 and the third edges 213 are disposed between the two first edges 211, and the second edges 212 and the third edges 213 are disposed in parallel, so that the two first cambered surfaces 214 and the two second cambered surfaces 215 are disposed on the clamping portion 21 in the present embodiment, but only two bolts 41 are disposed in the present embodiment, one bolt 41 abuts against the first cambered surface 214, and the other bolt 41 abuts against the second cambered surface 215, and of course, three or four bolts 41 may be disposed in other alternative embodiments to ensure that at least three of all the first cambered surfaces 214 and the second cambered surfaces 215 abut against the bolts 41, which is not particularly limited in the present embodiment.

Preferably, in this embodiment, the end portion of the end cap 2 is screwed to the cylinder body 1, the first half groove 11 is formed in the cylinder body 1 from the end portion of the cylinder body 1, the second half groove 22 is formed in the end cap 2 along the axial direction of the cylinder body 1, when the cylinder body 1 and the end cap 2 are in the screwed state, the first half groove 11 and the second half groove 22 together form an insertion hole extending along the axial direction of the cylinder body 1, a pin (not shown in the figure) is inserted in the insertion hole, and the pin can further ensure that the pin 23 cannot actuate the end cap 2, thereby further avoiding affecting the accuracy of the rotation driving of the cylinder.

Preferably, the cross section of the jack in this embodiment is circular, so as to ensure that the outer wall of the pin can be attached to the hole wall of the jack, thereby ensuring that the pin can effectively limit the relative rotation of the cylinder 1 and the end cover 2.

Based on the above, in this embodiment, the relative rotation of the cylinder body 1 and the end cover 2 is limited by the clamping piece 4, the bolt 41 and the pin, so that the rotation precision of the piston rod 3 can be effectively ensured not to be affected, and the influence on the precision of the rotation driving of the cylinder can be avoided.

Further, at least two jacks are formed between the cylinder body 1 and the end cover 2, namely at least two pins are inserted between the cylinder body 1 and the end cover 2, the at least two jacks are arranged at intervals around the axis of the end cover 2, and the at least two pins can act together, so that the accuracy of cylinder rotation driving is further prevented from being influenced.

In addition, the locking piece 4 in this embodiment can cover the insertion hole to prevent the pin from moving out of the insertion hole.

In order to realize the axial reciprocating movement of the piston rod 3, preferably, a spring 5 is sleeved on the periphery of the piston rod 3 in the embodiment, the spring 5 is connected or abutted between the end cover 2 and a first shaft shoulder 33 arranged on the piston rod 3, wherein an air inlet cavity is arranged on one side of the first shaft shoulder 33 far away from the opening of the cylinder body 1, an air outlet cavity is arranged on one side of the first shaft shoulder 33 close to the cylinder body 1, the cylinder body 1 is further provided with an air outlet 13, the air outlet 13 is communicated with the outside, and when the piston rod 3 moves to the outer side of the cylinder body 1, the spring 5 can be elastically deformed so as to have elastic potential energy for enabling the piston rod 3 to move to the inner side of the cylinder body 1, namely, the piston rod 3 is reset through the spring 5 in the embodiment, and a device for blowing air into the air outlet cavity is not required to be independently arranged, so that the production cost is reduced.

Besides the first shaft shoulder 33, a second shaft shoulder 34 is further arranged on the piston rod 3, the second shaft shoulder 34 is located on one side, far away from the spring 5, of the first shaft shoulder 33, a sealing ring 6 is pressed between the first shaft shoulder 33 and the second shaft shoulder 34, the sealing ring 6 is sleeved on the periphery of the piston rod 3 and pressed between the piston rod 3 and the inner wall of the cylinder body 1, and therefore the air inlet cavity and the air outlet cavity are isolated, and the piston rod 3 can be pushed to move towards the outer side of the cylinder body 1 stably.

In addition to the first spiral groove 31, the piston rod 3 in this embodiment is provided with a second spiral groove 32, the rotation direction of the second spiral groove 32 is opposite to that of the first spiral groove 31, the bolt 23 alternatively extends into the first spiral groove 31 and the second spiral groove 32, and when the bolt 23 extends into the first spiral groove 31, the rotation direction of the piston rod 3 is opposite to that of the piston rod 3 when the bolt 23 extends into the second spiral groove 32, and the cylinder in this embodiment can select the rotation direction of the piston rod 3, so as to meet different driving requirements.

Further, the cylinder further comprises a position detection assembly configured to detect the position of the piston rod 3 to determine whether the piston rod 3 is moved into position, thereby enabling monitoring of the working process of the cylinder.

Preferably, the position detecting assembly in this embodiment includes a magnet 71, a mounting sleeve 72, and a magnetic switch (not shown in the drawings), the magnet 71 is sleeved on the outer periphery of the piston rod 3, the mounting sleeve 72 is sleeved on the outer periphery of the piston rod 3, the magnet 71 is mounted between the mounting sleeve 72 and the second shoulder 34, the magnetic switch is mounted on the outside of the cylinder 1, specifically, the outside of the cylinder 1 is provided with a mounting groove 14 extending along the axial direction thereof, the magnetic switch is mounted in the mounting groove 14, the magnetic switch is configured to detect the position of the magnet 71, the magnet 71 can move together with the piston rod 3 when the piston rod 3 moves along the axial direction thereof, and the magnetic switch can monitor the position of the piston rod 3 by monitoring the position of the magnet 71.

It should be noted that the structure and the detection principle of the magnetic switch are both in the prior art, so that the description thereof is omitted in this embodiment.

It is to be understood that the above examples of the present utility model are provided for clarity of illustration only and are not limiting of the embodiments of the present utility model. Various obvious changes, rearrangements and substitutions can be made by those skilled in the art without departing from the scope of the utility model. It is not necessary here nor is it exhaustive of all embodiments. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the utility model are desired to be protected by the following claims.

Claims (10)

1. The utility model provides a cylinder, includes cylinder body (1), end cover (2) and piston rod (3), end cover (2) spiro union in the one end of cylinder body (1) is located the inside of cylinder body (1), end cover (2) with cylinder body (1) coaxial setting, cylinder body (1) with the periphery of piston rod (3) is all located to end cover (2), piston rod (3) can follow its axis and can stretch out cylinder body (1) with end cover (2), end cover (2) are configured to guide when piston rod (3) are followed its axis and are removed piston rod (3) are rotatory around its axis, its characterized in that:

the end cover (2) is located one end of cylinder body (1) outside is provided with joint portion (21), the cylinder still includes joint piece (4), joint piece (4) fixed connection in cylinder body (1) and cover are located the periphery of joint portion (21), in order to restrict cylinder body (1) with end cover (2) relative rotation.

2. The cylinder according to claim 1, characterized in that the contour of the outer periphery of the clamping portion (21) is arranged in a non-circular shape, and the contour of the inner ring of the clamping piece (4) is adapted to the contour of the outer periphery of the clamping portion (21).

3. The cylinder according to claim 2, wherein the contour of the outer periphery of the clamping portion (21) includes a first edge (211), two ends of the first edge (211) are respectively provided with a second edge (212) and a third edge (213), and the second edge (212) and the third edge (213) are both disposed at an included angle with the first edge (211).

4. A cylinder according to claim 3, characterized in that the contour of the periphery of the clamping portion (21) comprises at least two of the first edges (211).

5. The cylinder according to claim 1, characterized in that a first half groove (11) is formed in the end portion of the end cover (2) in a screwed connection mode of the cylinder body (1), the first half groove (11) is formed from the end portion of the cylinder body (1) toward the inside of the cylinder body (1) along the axial direction of the cylinder body (1), a second half groove (22) is formed in the end cover (2), and when the cylinder body (1) and the end cover (2) are in a screwed connection state, the first half groove (11) and the second half groove (22) jointly form an insertion hole extending along the axial direction of the cylinder body (1), and a pin is inserted into the insertion hole.

6. The cylinder of claim 5, wherein the receptacle is circular in cross-section.

7. A cylinder according to claim 5, characterized in that at least two of said receptacles are formed between said cylinder body (1) and said end cap (2).

8. The cylinder according to claim 5, characterized in that the clamping piece (4) covers the insertion hole.

9. Cylinder according to any of claims 1-8, characterized in that the clamping piece (4) is bolted and fixed with the cylinder body (1) by means of a bolt (41), the clamping part (21) is provided with a first cambered surface (214) which is concave, and the first cambered surface (214) is in clearance fit with the head of the bolt (41).

10. The cylinder according to claim 9, characterized in that the clamping portion (21) is further provided with a concave second cambered surface (215), the first cambered surface (214) and the second cambered surface (215) are both provided with the bolt (41), and the first cambered surface (214) and the second cambered surface (215) are both in clearance fit with the head of the bolt (41).

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