Hydraulic oil cylinder with high sealing performance

Abstract

The invention relates to the technical field of hydraulic oil cylinders, in particular to a hydraulic oil cylinder with high sealing performance, which comprises a piston cylinder and a sliding disc slidably arranged in the piston cylinder, one end of the sliding disc is provided with a piston rod extending out of the piston cylinder, and one end of the piston cylinder far away from the piston cylinder is provided with an oil injection port; an annular clamping groove is formed in the outer wall of the sliding disc, the sealing ring is arranged in the annular clamping groove through an annular clamping piece, a plurality of strip-shaped grooves are formed in the side, close to the oil filling opening, of the sliding disc in the circumferential direction, and a pressing mechanism used for enabling the sealing ring to be attached to the inner wall of the piston cylinder is arranged on the sliding disc. The stability of the sealing ring is kept through the annular clamping piece, the sealing ring is better attached to the inner wall of the piston cylinder through the pressing mechanism, and therefore the sealing effect is ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of hydraulic cylinders, and in particular to a hydraulic cylinder with high sealing performance. Background Art

[0002] The hydraulic cylinder is a hydraulic actuator that converts hydraulic energy into mechanical energy and performs linear reciprocating motion (or swinging motion). It has a simple structure and reliable operation. When it is used to achieve reciprocating motion, the deceleration device can be eliminated, and there is no transmission gap and the motion is smooth. Therefore, it is widely used in the hydraulic systems of various machines.

[0003] Among them, piston hydraulic cylinders can be divided into single-rod and double-rod types. The single-rod hydraulic cylinder inputs pressure into one chamber of the cylinder and relies on liquid pressure to make the cylinder move in one direction. Its piston is sealed only by the sealing ring. With the input of hydraulic oil, the liquid pressure inside the cylinder increases. At this time, the liquid pressure exerted on the sealing ring will also gradually increase. Under long-term high pressure, hydraulic oil leakage may occur, resulting in "cylinder explosion", thus affecting production safety. Summary of the invention

[0004] The main purpose of the present invention is to provide a hydraulic cylinder with high sealing performance, which ensures the stability of the sealing ring through the sealing ring and the annular clamp, and makes the sealing ring fit more closely to the inner wall of the piston cylinder through the first arc pressure plate and the second arc pressure plate, thereby ensuring the sealing effect.

[0005] To achieve the above-mentioned purpose, the present invention provides a hydraulic oil cylinder with high sealing performance, including a piston cylinder, a sliding disk, a sealing ring and a clamping mechanism; an oil filling port is arranged at one end of the piston cylinder, a guide hole is arranged at the end of the piston cylinder away from the oil filling port, the sliding disk is slidably arranged inside the piston cylinder, a piston rod is arranged at the end of the center of the sliding disk away from the oil filling port, and the piston rod is slidably arranged in the guide hole; an annular groove is arranged on the outer wall of the sliding disk, an annular clamp is arranged on the inner wall of the sealing ring, the annular clamp is arranged in the annular groove, and the sealing ring is located between the inner wall of the piston cylinder and the outer wall of the sliding disk; a plurality of A strip-shaped groove, a clamping mechanism is arranged on the sliding disk and is used to make the sealing ring fit the inner wall of the piston cylinder; the clamping mechanism includes a plurality of movable bars slidably arranged in the corresponding strip grooves; one end of each movable bar close to the axis of the sliding disk is connected to the end of the corresponding strip groove through a clamping spring, and a first arc-shaped pressure plate is arranged at one end of each movable bar away from the axis of the sliding disk, and arc-shaped guide grooves are arranged at both ends of the side of each first arc-shaped pressure plate away from the moving bar, and a second arc-shaped pressure plate is slidably arranged in each arc-shaped guide groove, and an annular accommodating groove for accommodating the first arc-shaped pressure plate and the second arc-shaped pressure plate is arranged at the edge of one side of the sliding disk close to the oil filling port.

[0006] Preferably, an arc-shaped connecting cover is further provided on the inner wall of the sealing ring, and the arc-shaped connecting cover and the sealing ring are integrally formed, the sealing ring is made of soft silicone material, and the arc-shaped connecting cover is made of hard rubber material.

[0007] Preferably, a sliding hole is provided at the center of one side of the sliding disk close to the oil filling port, a connecting rod is slidably provided in the sliding hole, a buffer spring is provided between the connecting rod and the inner wall at the bottom of the sliding hole, and an arc-shaped support plate is provided at the end of the connecting rod away from the sliding hole.

[0008] Preferably, two guide grooves are mirrored on the inner wall of the sliding hole, and a guide block is mirrored on the outer wall of the connecting rod. The guide block can be slidably arranged in the corresponding guide grooves. An annular groove is arranged at the center of one side of the sliding plate close to the sliding hole, and a limiting ring is arranged in the annular groove.

[0009] Preferably, a plurality of vertical grooves corresponding to the strip-shaped grooves are circumferentially arranged on one side of the sliding plate close to the oil filling port, a right-angled trapezoidal block is slidably arranged in each vertical groove, and an extension plate extending into the corresponding vertical groove is arranged at one end of each movable bar away from the corresponding first arc-shaped pressure plate, and a triangular clamping block cooperating with the right-angled trapezoidal block is arranged on the extension plate.

[0010] Preferably, a return spring is also sleeved on the piston rod.

[0011] Preferably, a guide spring is also arranged in each arc-shaped guide groove.

[0012] Compared with the prior art, the present invention has the following beneficial effects: 1. In the present application, the cooperation of the first arc-shaped pressure plate and the second arc-shaped pressure plate enables the sealing ring to adaptively fit the inner wall of the piston cylinder, thereby ensuring the sealing effect.

[0013] 2. In the present application, the arc-shaped connecting cover and the arc-shaped supporting plate are coordinated. The arc-shaped connecting cover can not only prevent the hydraulic oil from overflowing through the imaginary receiving groove at the edge of the sliding disk, but also the arc-shaped connecting cover made of hard rubber is deformed under the pressure of the hydraulic oil, so that the edge of the arc-shaped connecting cover can perform secondary extrusion on the edge of the sealing ring, thereby further improving the sealing effect of the sealing ring.

[0014] 3. The present application arranges a right-angle trapezoidal block in the vertical groove, so that during the movement of the arc support plate, multiple first arc pressure plates can be synchronously moved toward the direction close to the sealing ring. According to the different pressures in the piston cylinder, the squeezing force of the first arc pressure plate and the second arc pressure plate on the sealing ring can be increased accordingly, thereby ensuring the sealing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention, so that other features, purposes and advantages of the present invention become more obvious. The accompanying drawings of the exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the accompanying drawings: Figure 1 is a stereogram of the present invention; Figure 2 is a front view of the present invention; Figure 3 yes Figure 2 Plane section view along AA direction; Figure 4 yes Figure 3 A partial enlarged view of point B in the middle; Figure 5 It is a partial stereogram of the present invention; Figure 6 yes Figure 5 A partial enlarged view of point C in the middle; Figure 7 The local stereo decomposition of the present invention Figure 1 ; Figure 8 The local stereo decomposition of the present invention Figure 2 ; Fig. 9 yes Figure 8 A partial enlarged view of point D in the middle.

[0016] The numbers in the above figure are: 1-piston cylinder; 11-oil filling port; 12-guide hole; 2-sliding plate; 21-piston rod; 211-reset spring; 22-annular groove; 23-strip groove; 24-annular receiving groove; 25-sliding hole; 251-guide groove; 26-connecting rod; 261-arc support plate; 262-guide block; 27-buffer spring; 28-annular groove; 281-limiting ring; 29-vertical groove; 291-right-angle trapezoidal block; 3-sealing ring; 31-annular clamp; 32-arc-shaped connecting cover; 4-clamping mechanism; 41-moving bar; 411-extension plate; 412-triangular block; 42-clamping spring; 43-first arc-shaped pressing plate; 431-arc-shaped guiding groove; 432-guiding spring; 44-second arc-shaped pressing plate. DETAILED DESCRIPTION

[0017] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0018] See also Figures 1 to 9 As shown, a hydraulic oil cylinder with high sealing performance comprises a piston cylinder 1, a sliding disc 2, a sealing ring 3 and a clamping mechanism 4; an oil filling port 11 is arranged at one end of the piston cylinder 1, a guide hole 12 is arranged at the end of the piston cylinder 1 away from the oil filling port 11, the sliding disc 2 is slidably arranged inside the piston cylinder 1, a piston rod 21 is arranged at the end of the center of the sliding disc 2 away from the oil filling port 11, and the piston rod 21 is slidably arranged in the guide hole 12; an annular groove 22 is arranged on the outer wall of the sliding disc 2, an annular clamp 31 is arranged on the inner wall of the sealing ring 3, the annular clamp 31 is arranged in the annular groove 22, and the sealing ring 3 is located between the inner wall of the piston cylinder 1 and the outer wall of the sliding disc 2; a plurality of strip grooves 23 are circumferentially arranged on one side of the sliding disc 2 close to the oil filling port 11, and a clamping mechanism 4 is provided. The tightening mechanism 4 is arranged on the sliding disk 2 and is used to make the sealing ring 3 fit the inner wall of the piston cylinder 1; the clamping mechanism 4 includes a plurality of movable bars 41 slidably arranged in corresponding strip grooves 23; one end of each movable bar 41 close to the axis of the sliding disk 2 is connected to the end of the corresponding strip groove 23 through a clamping spring 42, and a first arc-shaped pressure plate 43 is arranged at one end of each movable bar 41 away from the axis of the sliding disk 2, and an arc-shaped guide groove 431 is arranged at both ends of a side of each first arc-shaped pressure plate 43 away from the moving bar 41, and a second arc-shaped pressure plate 44 is slidably arranged in each arc-shaped guide groove 431, and an annular accommodating groove 24 for accommodating the first arc-shaped pressure plate 43 and the second arc-shaped pressure plate 44 is arranged at an edge of one side of the sliding disk 2 close to the oil filling port 11.

[0019] The staff injects hydraulic oil into the piston cylinder 1 through the oil filling port 11. At this time, the hydraulic oil is located between the sliding disk 2 and the oil filling port 11, thereby pushing the sliding disk 2 to move. The annular clamp 31 is integrally formed with the sealing ring 3. The sealing ring 3 is connected to the sliding disk 2 through the annular clamp 31, which can prevent the sealing ring 3 from shifting or shaking during use, thereby ensuring that it can remain stable; the second arc pressure plate 44 and the adjacent second arc pressure plate 44 are close to each other. At this time, multiple first arc pressure plates 43 and multiple second arc pressure plates 44 form a "clamping ring" that can fit tightly against the sealing ring 3. During the movement of the sliding disk 2, the "clamping ring" can adaptively fit the inner wall of the piston cylinder 1 under the elastic force of the compression spring, thereby ensuring that the "clamping ring" can always fit the inner wall of the piston cylinder 1 to ensure the sealing effect.

[0020] See also Figure 4 As shown, an arc-shaped connecting cover 32 is also provided on the inner wall of the sealing ring 3. The arc-shaped connecting cover 32 is integrally formed with the sealing ring 3. The sealing ring 3 is made of soft silicone material, and the arc-shaped connecting cover 32 is made of hard rubber material.

[0021] In order to further ensure the sealing effect between the sliding disk 2 and the piston cylinder 1 and prevent the hydraulic oil from leaking from the annular receiving groove 24; an arc-shaped connecting cover 32 is provided on the inner wall of the sealing ring 3, and the arc-shaped connecting cover 32 is integrally formed with the sealing ring 3, the sealing ring 3 is made of soft silicone material, and the arc-shaped connecting cover 32 is made of hard rubber material; the cross-section of the arc-shaped connecting cover 32 is in an arc shape, at this time, the arc-shaped connecting cover 32, the sealing ring 3 and the side of the sliding disk 2 close to the oil filling port 11 form a cavity, the first arc-shaped pressure plate 43 and the second arc-shaped pressure plate 44 are both located inside the cavity, thereby preventing the hydraulic oil from leaking from the annular receiving groove 24; and when the pressure in the piston cylinder 1 increases, the hydraulic oil can squeeze the arc-shaped connecting cover 32, at this time, the squeezed arc-shaped connecting cover 32 can be deformed, so that the edge of the arc-shaped connecting cover 32 can perform secondary squeezing on the edge of the sealing ring 3, thereby further improving the sealing effect of the sealing ring 3.

[0022] See also Figures 4 to 9 As shown, a sliding hole 25 is provided at the center of one side of the sliding disk 2 close to the oil filling port 11, a connecting rod 26 is slidably provided in the sliding hole 25, a buffer spring 27 is provided between the connecting rod 26 and the bottom inner wall of the sliding hole 25, and an arc-shaped support plate 261 is provided at the end of the connecting rod 26 away from the sliding hole 25.

[0023] In order to avoid excessive deformation of the arc-shaped connecting cover 32, which may cause the connection position between the arc-shaped connecting cover 32 and the sealing ring 3 to fall off; an arc-shaped support plate 261 is arranged on the connecting rod 26, and the arc-shaped support plate 261 fits with the arc-shaped connecting cover 32 under the elastic force of the buffer spring 27, thereby supporting the arc-shaped connecting cover 32, which can not only avoid excessive deformation of the arc-shaped connecting cover 32, but also guide the deformation position of the arc-shaped connecting cover 32, thereby further improving the fit between the sealing ring 3 and the piston cylinder 1.

[0024] See also Figures 8 to 9 As shown, two guide grooves 251 are mirror-imaged on the inner wall of the sliding hole 25, and a guide block 262 is mirror-imaged on the outer wall of the connecting rod 26. The guide block 262 is slidably arranged in the corresponding guide groove 251. An annular groove 28 is arranged at the center of one side of the sliding plate 2 close to the sliding hole 25, and a limiting ring 281 is arranged in the annular groove 28.

[0025] The guide block 262 and the guide groove 251 are provided to ensure the stability of the movement of the connecting rod 26 , and the limit ring 281 is provided to limit the position of the connecting rod 26 to prevent the connecting rod 26 from falling out of the sliding hole 25 .

[0026] See also Figure 4 and Figure 7 As shown, a plurality of vertical grooves 29 corresponding to the strip grooves 23 are circumferentially arranged on one side of the sliding plate 2 close to the oil filling port 11, and a right-angled trapezoidal block 291 is slidably arranged in each vertical groove 29, and an extension plate 411 extending into the corresponding vertical groove 29 is arranged at one end of each movable bar 41 away from the corresponding first arc-shaped pressure plate 43, and a triangular clamping block 412 cooperating with the right-angled trapezoidal block 291 is arranged on the extension plate 411.

[0027] As the pressure in the piston cylinder 1 increases, the arc support plate 261 moves along with the movement of the arc connecting cover 32. The arc support plate 261 can contact the corresponding multiple right-angled trapezoidal blocks 291. The inclined surface of the right-angled trapezoidal block 291 can interfere with the inclined surface of the corresponding triangular block 412. As the arc support plate 261 moves, the right-angled trapezoidal block 291 can move along the corresponding vertical groove 29. Through the extension plate 411, the multiple first arc pressure plates 43 can fit the sealing ring 3 more closely, thereby further improving the sealing effect of the sealing ring 3.

[0028] See also Figure 3 As shown, a return spring 211 is also sleeved on the piston rod 21 .

[0029] By providing a return spring 211 , the return spring 211 is located inside the corresponding piston cylinder 1 , so that the piston rod 21 can be quickly returned.

[0030] See also Figure 7 As shown, a guide spring 432 is also disposed in each arc-shaped guide groove 431 .

[0031] By providing a guide spring 432, when the first arc pressure plate 43 moves, the second arc pressure plate 44 can always move in a direction away from the first arc pressure plate 43, so as to fit with the adjacent second arc pressure plate 44, ensuring that the sealing ring 3 can be squeezed circumferentially to ensure the sealing effect.

[0032] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A hydraulic cylinder with high sealing performance, characterized in that: It includes a piston cylinder, a sliding plate, a sealing ring and a clamping mechanism; An oil filling port is arranged at one end of the piston cylinder, a sliding hole is arranged at the end of the piston cylinder away from the oil filling port, a sliding plate is slidably arranged inside the piston cylinder, a piston rod is arranged at the end of the center of the sliding plate away from the oil filling port, and the piston rod is slidably arranged in the sliding hole; The outer wall of the sliding disk is provided with an annular groove, the inner wall of the sealing ring is provided with an annular clamping piece, the annular clamping piece is arranged in the annular groove, and the sealing ring is located between the inner wall of the piston cylinder and the outer wall of the sliding disk; A plurality of strip grooves are circumferentially arranged on one side of the sliding disk close to the oil filling port, and a clamping mechanism is arranged on the sliding disk and is used to make the sealing ring fit the inner wall of the piston cylinder; the clamping mechanism includes a plurality of movable bars slidably arranged in the corresponding strip grooves; one end of each movable bar close to the axis of the sliding disk is connected to the end of the corresponding strip groove through a clamping spring, and a first arc-shaped pressure plate is arranged at one end of each movable bar away from the axis of the sliding disk, and arc-shaped guide grooves are arranged at both ends of a side of each first arc-shaped pressure plate away from the moving bar, and a second arc-shaped pressure plate is slidably arranged in each arc-shaped guide groove, and an annular accommodating groove for accommodating the first arc-shaped pressure plate and the second arc-shaped pressure plate is arranged at the edge of one side of the sliding disk close to the oil filling port.

2. A hydraulic cylinder with high sealing performance according to claim 1, characterized in that: An arc-shaped connecting cover is also provided on the inner wall of the sealing ring. The arc-shaped connecting cover and the sealing ring are integrally formed. The sealing ring is made of soft silicone material, and the arc-shaped connecting cover is made of hard rubber material.

3. A hydraulic cylinder with high sealing performance according to claim 2, characterized in that: A sliding hole is arranged at the center of one side of the sliding plate close to the oil filling port, a connecting rod is slidingly arranged in the sliding hole, a buffer spring is arranged between the connecting rod and the inner wall at the bottom of the sliding hole, and an arc-shaped supporting plate is arranged at the end of the connecting rod away from the sliding hole.

4. A hydraulic cylinder with high sealing performance according to claim 3, characterized in that: Two guide grooves are mirrored on the inner wall of the sliding hole, and a guide block is mirrored on the outer wall of the connecting rod. The guide block is slidably arranged in the corresponding guide groove. An annular groove is arranged at the center of one side of the sliding plate close to the sliding hole, and a limiting ring is arranged in the annular groove.

5. The hydraulic cylinder with high sealing performance according to claim 3, characterized in that: A plurality of vertical grooves corresponding to the strip-shaped grooves are circumferentially arranged on one side of the sliding plate close to the oil filling port, and a right-angled trapezoidal block is slidably arranged in each vertical groove. An extension plate extending into the corresponding vertical groove is arranged at one end of each movable bar away from the corresponding first arc-shaped pressure plate, and a triangular clamping block cooperating with the right-angled trapezoidal block is arranged on the extension plate.

6. The hydraulic cylinder with high sealing performance according to claim 1, characterized in that: A return spring is also sleeved on the piston rod.

7. The hydraulic cylinder with high sealing performance according to claim 1, characterized in that: A guide spring is also arranged in each arc-shaped guide groove.

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