Air cylinder sliding rail structure

Abstract

The utility model provides an air cylinder sliding rail structure which solves the problem that an existing air cylinder is poor in stability. An air cylinder comprises a horizontally-arranged cylinder body and a push plate arranged on the front side of the cylinder body, a piston cavity is formed in the middle of the cylinder body, the axis of the piston cavity extends front and back, a sliding rail structure comprises two guide holes which are formed in the cylinder body in a front-back penetrating mode, the two guide holes are formed in the left side and the right side of the piston cavity respectively, and guide rods are horizontally arranged in the two guide holes. The front ends of the guide rods extend out of the guide holes and are fixedly connected with the push plates, and the inner walls of the front ends of the guide holes and the side walls of the corresponding guide rods are always sealed; sealing pieces for sealing the rear ports of the corresponding guide holes are fixed in the rear ends of the two guide holes, and the rear end faces of the guide rods can be pressed on the corresponding sealing pieces. The cylinder slide rail structure can improve the working stability of the cylinder.

Description

Technical Field

[0001] The utility model relates to a cylinder, in particular to a cylinder slide rail structure. Background Art

[0002] The working principle of the cylinder is to use the pressure of gas to drive the reciprocating motion of the piston rod or piston, thereby achieving the output of mechanical work.

[0003] Existing cylinders, such as a new type of three-rod force-balanced thin cylinder disclosed in the China Patent Library (application number: 201510413614.7), include a force pressure plate, a force piston rod, a baffle and a cylinder body, the force pressure plate is provided with four threaded through holes, two exhaust through holes, two auxiliary piston holes and one main piston hole, the force piston rod includes a main piston rod and two auxiliary piston rods, the baffle is made of chrome-plated alloy steel, the cylinder body is made of Cr12MoTr alloy steel, there are three cylinder barrels in the cylinder body, there are four C-shaped grooves, one trapezoidal groove, two cross grooves, four threaded through holes, four nut holes and two threaded air holes on the front and back of the cylinder body, the left side of the cylinder body is a smooth plane, and the right side of the cylinder body has two closed air holes and a C-shaped shallow groove.

[0004] The above cylinder improves the sliding stability of the pressure plate by arranging two auxiliary piston rods on both sides of the main piston rod. However, as can be seen from the attached figure of the cylinder, the auxiliary piston hole that cooperates with the auxiliary piston rod is in a through shape, which causes dust and other impurities to accumulate in the auxiliary piston hole during use, forming an obstruction and affecting the stable operation of the cylinder. Utility Model Content

[0005] The utility model aims to solve the above problems in the prior art and proposes a cylinder slide rail structure with stable operation.

[0006] The purpose of the utility model can be achieved through the following technical solutions: a cylinder slide rail structure, the cylinder includes a horizontally arranged cylinder body and a push plate arranged on the front side of the cylinder body, a piston cavity is arranged in the middle of the cylinder body, and the axis of the piston cavity extends forward and backward, the slide rail structure includes two guide holes arranged on the cylinder body through the front and back, the two guide holes are respectively arranged on the left and right sides of the piston cavity, guide rods are horizontally arranged in the two guide holes, and the front ends of the guide rods extend out of the guide holes and are fixedly connected to the above-mentioned push plate, characterized in that the inner wall of the front end of the guide hole and the corresponding guide rod side wall are always kept in a sealed state; the rear ends of the two guide holes are fixed with sealing members that close the rear ports of the corresponding guide holes, and the rear end faces of the guide rods can be pressed on the corresponding sealing members.

[0007] With the cooperation of the seal and the sealing state always maintained between the inner wall of the front end of the guide hole and the corresponding guide rod side wall, the guide rod slides in a relatively closed space, thereby effectively preventing the influence of dust and other impurities on the sliding of the guide rod, greatly enhancing the working stability of the cylinder.

[0008] At the same time, the rear end surface of the guide rod can be pressed on the corresponding seal to effectively increase the length of the guide rod to increase the telescopic stroke of the cylinder and make the cylinder more practical.

[0009] In the above-mentioned cylinder slide rail structure, an annular step is provided on the inner wall of the above-mentioned guide hole at the front end, and the annular step is composed of an annular side surface and an annular bottom surface arranged vertically. A sealing ring is fixed in the annular step, and the sealing ring is pressed on the annular bottom surface, and the inner and outer sides of the sealing ring are in contact and sealed with the corresponding guide rod and the corresponding annular side surface respectively. The sealing ring hugs the guide rod to form a seal, which can effectively block external dust and other impurities outside the guide hole, so that the cylinder can work more stably.

[0010] In the above cylinder slide rail structure, two positioning rings are fixed at the front end of the cylinder body, and the positioning rings are sleeved outside the corresponding guide rods and pressed on the front end surfaces of the corresponding sealing rings. The sealing rings are clamped and positioned between the positioning rings and the annular bottom surface, which can effectively prevent the sealing rings from falling off.

[0011] In the above-mentioned cylinder slide rail structure, the outer wall of the guide rod and the inner wall of the corresponding guide hole are in contact with each other through the circumferential surface, which effectively enhances the sliding stability of the guide rod.

[0012] In the above cylinder slide rail structure, blind holes are axially opened on both seals, and springs are arranged in the blind holes. One end of the spring presses against the bottom wall of the blind hole, and the other end of the spring can press against the rear end surface of the corresponding guide rod. The spring acts as a buffer, so that the guide rod impacts the seal more gently, thereby reducing working noise and extending service life.

[0013] In the above-mentioned cylinder slide rail structure, the seal includes a cylindrical body that matches the inner hole at the rear end of the guide hole. The body is inserted and fixed in the rear end of the guide hole. The front end of the body is open and the rear end is closed, and the inner hole of the body is the above-mentioned blind hole.

[0014] In the above cylinder slide rail structure, the rear end of the main body extends out of the guide hole, and an annular pressing edge coaxial with the main body is formed on the outer wall of the rear end of the main body, and the annular pressing edge is tightly pressed on the cylinder body, and the main body is fixedly connected to the cylinder body through the annular pressing edge. The above design facilitates the installation of the seal.

[0015] In the above-mentioned cylinder slide rail structure, the type of the annular pressing edge is an annular flange, and the annular pressing edge is fixedly connected to the cylinder body by a circle of screws, which further facilitates the installation of the seal.

[0016] In the above-mentioned cylinder slide rail structure, two annular grooves are opened on the rear end surface of the cylinder body, and the two annular grooves are respectively arranged opposite to the two annular pressing edges. Annular sealing gaskets are arranged in the two annular grooves, and the two end surfaces of the annular sealing gaskets are respectively pressed tightly on the corresponding annular groove bottom wall and the corresponding annular pressing edge to enhance the effect of closing the rear port of the guide hole.

[0017] Compared with the prior art, the cylinder slide rail structure has the following advantages:

[0018] 1. With the cooperation of the seal and the inner wall of the front end of the guide hole and the corresponding guide rod side wall, the guide rod slides in a relatively closed space, thereby effectively preventing the influence of dust and other impurities on the sliding of the guide rod and greatly enhancing the working stability of the cylinder.

[0019] 2. The spring acts as a buffer, allowing the guide rod to impact the seal more effectively, thereby reducing working noise and extending service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a three-dimensional schematic diagram of the cylinder.

[0021] Figure 2 It is a cross-sectional schematic diagram of the cylinder.

[0022] Figure 3 yes Figure 2 Enlarged schematic diagram at point A in the middle.

[0023] In the figure, 1, cylinder body; 2, push plate; 3, guide rod; 4, seal; 4a, main body; 4a1, blind hole; 4b, annular pressure edge; 5, sealing ring; 6, spring; 7, positioning ring; 8, annular sealing gasket. DETAILED DESCRIPTION

[0024] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0025] like Figure 1 As shown, the cylinder comprises a horizontally arranged cylinder body 1 and a push plate 2 arranged at the front side of the cylinder body 1. A piston cavity for accommodating a piston is arranged in the middle of the cylinder body 1, and the axis of the piston cavity extends forward and backward.

[0026] Specifically,

[0027] like Figure 1 and Figure 2 As shown, the cylinder slide rail structure includes two guide holes that penetrate the cylinder body 1 from front to back, and the two guide holes are respectively arranged on the left and right sides of the piston cavity. A guide rod 3 is horizontally arranged in each of the two guide holes, and the outer wall of the guide rod 3 and the inner wall of the corresponding guide hole are in contact with each other through the circumferential surface, and the front end of the guide rod 3 extends out of the guide hole and is fixedly connected to the push plate 2. The inner wall of the front end of the guide hole and the side wall of the corresponding guide rod 3 are always kept in a sealed state; the rear ends of the two guide holes are fixed with a seal 4 that closes the rear port of the corresponding guide hole, and the rear end surface of the guide rod 3 can be pressed on the corresponding seal 4.

[0028] With the cooperation of the seal 4 and the sealing state always maintained between the inner wall of the front end of the guide hole and the corresponding side wall of the guide rod 3, the guide rod 3 slides in a relatively closed space, thereby effectively preventing the influence of dust and other impurities on the sliding of the guide rod 3, greatly enhancing the working stability of the cylinder.

[0029] At the same time, the rear end surface of the guide rod 3 can be pressed on the corresponding seal 4 to effectively increase the length of the guide rod 3 to increase the telescopic stroke of the cylinder, making the cylinder more practical.

[0030] In this embodiment,

[0031] like Figure 2 and Figure 3 As shown, the guide hole and the guide rod 3 form a seal in the following manner: an annular step is provided on the inner wall of the guide hole at the front end, and the annular step is coaxially arranged with the corresponding guide hole. The axial cross section of the annular step is L-shaped, and the annular step is composed of a vertically arranged annular side surface and an annular bottom surface. A sealing ring 5 is fixed inside the annular step, and the sealing ring 5 is pressed on the annular bottom surface, and the inner and outer sides of the sealing ring 5 are respectively in contact and sealed with the corresponding guide rod 3 and the corresponding annular side surface. The sealing ring 5 hugs the guide rod 3 to form a seal, which can effectively block external dust and other impurities outside the guide hole, so that the cylinder can work more stably.

[0032] Further explanation, two positioning rings 7 are fixed to the front end of the cylinder body 1, and the positioning rings 7 are sleeved outside the corresponding guide rods 3 and pressed on the front end surface of the corresponding sealing rings 5. That is, at this time, the sealing rings 5 ​​are clamped and positioned between the positioning rings 7 and the annular bottom surface, which can effectively prevent the sealing rings 5 ​​from falling off. Among them, it is preferred that the positioning rings 7 are detachably connected to the cylinder body 1 by screws, so as to facilitate the replacement of the sealing rings 5; naturally, the positioning rings 7 and the cylinder body 1 can also be welded and connected.

[0033] like Figure 2 As shown, blind holes 4a1 are axially opened on both seals 4, and springs 6 are arranged in the blind holes 4a1, one end of the spring 6 presses against the bottom wall of the blind hole 4a1, and the other end of the spring 6 can press against the rear end surface of the corresponding guide rod 3. The spring 6 plays a buffering role, so that the guide rod 3 impacts the seal 4 more gently, so as to reduce the working noise and prolong the service life.

[0034] The structure of the seal 4 is as follows: the seal 4 includes a main body 4a which is cylindrical and matches the inner hole of the rear end of the guide hole. The main body 4a is inserted and fixed in the rear end of the guide hole. The front end of the main body 4a is open and the rear end is closed, and the inner hole of the main body 4a is the above-mentioned blind hole 4a1.

[0035] The main body 4a and the cylinder body 1 are connected in the following manner: the rear end of the main body 4a extends out of the guide hole, and an annular pressing edge 4b ​​coaxial with the main body 4a is integrally formed on the outer wall of the rear end of the main body 4a, and the annular pressing edge 4b ​​is tightly pressed on the cylinder body 1, and the main body 4a is connected to the cylinder body 1 through the annular pressing edge 4b. Preferably, the type of the annular pressing edge 4b ​​is an annular flange, and the annular pressing edge 4b ​​is connected to the cylinder body 1 through a circle of screws, which is convenient for the installation of the seal 4.

[0036] To further illustrate, two annular grooves are provided on the rear end face of the cylinder body 1, and the two annular grooves are respectively arranged opposite to the two annular pressure edges 4b. Annular sealing gaskets 8 are provided in the two annular grooves, and the two end faces of the annular sealing gaskets 8 are respectively pressed tightly against the corresponding annular groove bottom wall and the corresponding annular pressure edge 4b ​​to enhance the effect of closing the rear port of the guide hole.

[0037] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

Claims

1. A cylinder slide rail structure, wherein the cylinder comprises a horizontally arranged cylinder body (1) and a push plate (2) arranged at the front side of the cylinder body (1), a piston cavity is arranged in the middle of the cylinder body (1), and the axis of the piston cavity extends forward and backward, the slide rail structure comprises two guide holes penetrating the cylinder body (1) from front to back, the two guide holes are arranged at the left and right sides of the piston cavity respectively, guide rods (3) are arranged horizontally in the two guide holes, and the front ends of the guide rods (3) extend out of the guide holes and are fixedly connected to the push plate (2), characterized in that: The inner wall at the front end of the guide hole and the side wall of the corresponding guide rod (3) are always kept in a sealed state; a sealing member (4) is fixed in the rear end of each of the two guide holes to close the rear end of the corresponding guide hole, and the rear end surface of the guide rod (3) can be pressed on the corresponding sealing member (4).

2. The cylinder slide rail structure according to claim 1, characterized in that: An annular step is provided on the inner wall of the guide hole at the front end, the annular step being composed of an annular side surface and an annular bottom surface arranged vertically, a sealing ring (5) being fixed in the annular step, the sealing ring (5) being pressed on the annular bottom surface, and the inner and outer side surfaces of the sealing ring (5) being in contact and sealed with the corresponding guide rod (3) and the corresponding annular side surface respectively.

3. The cylinder slide rail structure according to claim 2, characterized in that: Two positioning rings (7) are fixed to the front end of the cylinder body (1). The positioning rings (7) are sleeved outside the corresponding guide rods (3) and pressed against the front end surfaces of the corresponding sealing rings (5).

4. The cylinder slide rail structure according to claim 1, 2 or 3, characterized in that: The outer wall of the guide rod (3) and the inner wall of the corresponding guide hole are in contact with each other through a circumferential surface.

5. The cylinder slide rail structure according to claim 4, characterized in that: A blind hole (4a1) is axially opened on both sealing members (4), a spring (6) is arranged in the blind hole (4a1), one end of the spring (6) is pressed against the bottom wall of the blind hole (4a1), and the other end of the spring (6) can be pressed against the rear end surface of the corresponding guide rod (3).

6. The cylinder slide rail structure according to claim 5, characterized in that: The sealing member (4) comprises a main body (4a) which is cylindrical and matches the inner hole at the rear end of the guide hole. The main body (4a) is inserted and fixed in the rear end of the guide hole. The main body (4a) has an open front end and a closed rear end. The inner hole of the main body (4a) is the above-mentioned blind hole (4a1).

7. The cylinder slide rail structure according to claim 6, characterized in that: The rear end of the main body (4a) extends out of the guide hole, and an annular pressing edge (4b) coaxial with the main body (4a) is formed on the outer wall of the rear end of the main body (4a), and the annular pressing edge (4b) is tightly pressed on the cylinder body (1), and the main body (4a) is fixedly connected to the cylinder body (1) via the annular pressing edge (4b).

8. The cylinder slide rail structure according to claim 7, characterized in that: The annular pressing edge (4b) is an annular flange, and the annular pressing edge (4b) is fixedly connected to the cylinder body (1) via a circle of screws.

9. The cylinder slide rail structure according to claim 8, characterized in that: Two annular grooves are formed on the rear end surface of the cylinder body (1), and the two annular grooves are respectively arranged opposite to the two annular pressing edges (4b). An annular sealing gasket (8) is provided in each of the two annular grooves, and the two end surfaces of the annular sealing gasket (8) are respectively pressed tightly against the bottom wall of the corresponding annular groove and the corresponding annular pressing edge (4b).

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