Cylinder

Abstract

The utility model discloses an air cylinder which comprises an air cylinder body, the air cylinder body is provided with a piston rod capable of moving telescopically, and a sealing ring in contact with the piston rod is arranged on the air cylinder body. The lubricating mechanism is arranged on the side, close to the piston rod, of the air cylinder body, lubricating oil is stored in the lubricating mechanism, and the lubricating oil in the lubricating mechanism is transmitted to the piston rod when the lubricating mechanism is started; and the touch block is arranged on the piston rod, the touch block synchronously moves along with the movement of the piston rod, after the touch block moves to be in contact with the moving end of the lubricating mechanism, the lubricating mechanism discharges oil, and after the touch block is separated from the lubricating mechanism, the lubricating mechanism stops discharging oil. The utility model can ensure that the piston rod is always provided with lubricating oil so as to prevent the sealing ring from being damaged due to large friction between the piston rod and the sealing ring.

Description

Technical Field

[0001] The utility model relates to the technical field of cylinder equipment, in particular to a cylinder. Background Art

[0002] A cylinder is a device that converts the energy of compressed air into mechanical energy. It drives external mechanical components through the linear reciprocating motion or rotary motion of an internal piston to achieve actions such as pushing, pulling, lifting, clamping, and rotating. Cylinders are widely used in fields such as textiles, manipulators, and production lines. Sealing rings are usually provided on cylinders, and the sealing rings are installed at the connection between the piston and the piston rod, the edge of the piston, and the joint surface between the cylinder head and the cylinder block. The purpose is to prevent gas or liquid leakage, ensure the sealing performance and normal operation of the cylinder. And lubricating oil usually needs to be regularly coated between the sealing ring and the piston rod to ensure that there is no large frictional force between the piston rod and the sealing ring during movement. However, when the lubricating oil at the connection gradually consumes, the frictional force between them will increase, which easily causes the sealing ring to be worn, reduces its sealing ability, and leads to gas or liquid leakage, affecting the use safety of the cylinder. Content of the Utility Model

[0003] The purpose of the utility model is to provide a cylinder aiming at the above deficiencies at present, so as to make the sealing ring not easily worn and ensure the use safety of the cylinder.

[0004] To solve the above technical problems, the utility model adopts the following technical solutions: A cylinder, including,

[0005] A cylinder body having a piston rod capable of telescopic movement, and a sealing ring in contact with the piston rod is provided on the cylinder body;

[0006] A lubricating mechanism is arranged on one side of the cylinder body close to the piston rod. Lubricating oil is stored inside the lubricating mechanism, and the lubricating oil inside is transferred to the piston rod when it is started;

[0007] A trigger block is arranged on the piston rod. The trigger block moves synchronously with the piston rod. After the trigger block moves to contact the moving end of the lubricating mechanism, the lubricating mechanism discharges oil, and the lubricating mechanism stops discharging oil after the trigger block separates from the lubricating mechanism.

[0008] Further, the cylinder body further includes a cylinder block, and the piston rod is slidably arranged at the moving end of the cylinder block.

[0009] Further, the lubrication mechanism includes a housing disposed on the side of the cylinder block close to the piston rod. The center of the housing is hollow to allow the piston rod to pass through. The sealing ring is embedded on the side of the housing close to the cylinder block. A plurality of annularly distributed balls are rotatably disposed on the lower side of the inner wall of the housing, and rolling grooves are formed at the installation positions of the housing and the corresponding balls. The balls are located in the rolling grooves, and the diameter of the balls is smaller than the inner diameter of the rolling grooves. Each ball contacts the piston rod. An oil storage cavity is formed inside the housing. An L-channel is formed in the housing. A storage groove is further formed in the housing at the top of the L-channel. The oil storage cavity, the storage groove, the L-channel, and the rolling groove are all interconnected. An oil injection nozzle communicating with the oil storage cavity is provided on the housing. Lubricating oil is input into the oil storage cavity through the oil injection nozzle. A pressing assembly is slidably disposed on the housing. When the piston rod contracts towards the inside of the cylinder block, it drives the trigger block to move towards the side close to the pressing assembly and presses the pressing assembly, so as to enable the pressing assembly to press the lubricating oil downward, causing the lubricating oil to flow onto the balls. The rotation of the balls contacted by the moving piston rod coats the lubricating oil on the balls onto the piston rod.

[0010] Further, the pressing assembly includes a mounting sleeve disposed on the top wall of the housing. The mounting sleeve communicates with the oil storage cavity. A telescopic sleeve is slidably disposed in the mounting sleeve. The telescopic sleeve is in dynamic sealing fit with the mounting sleeve. A pressing plate is disposed at the bottom of the telescopic sleeve. The pressing plate is located in the oil storage cavity. A pressing block is disposed at the position of the bottom of the pressing plate corresponding to the storage groove. The pressing block cooperates with the storage groove to increase the oil pressure in the storage groove when the pressing plate descends. A tension spring is disposed on the pressing plate. One end of the tension spring away from the pressing plate is connected to the top wall of the corresponding oil storage cavity inside the housing.

[0011] Further, a threaded groove is formed inside the telescopic sleeve, and a threaded rod threadedly engaged with the threaded groove is disposed in the threaded groove.

[0012] The beneficial effects of the present utility model are embodied in:

[0013] In the present utility model, when the cylinder body is started to make the piston rod perform telescopic movement, the trigger block will also move synchronously. When the trigger block moves towards the side close to the lubrication mechanism until it contacts the moving end of the lubrication mechanism, the lubrication mechanism is started to coat the lubricating oil onto the piston rod. At the same time, since the piston rod will extend out of or retract into the cylinder body, it will drive the lubricating oil thereon to move into contact with the sealing ring, thereby ensuring that there is always lubricating oil on the piston rod to prevent the sealing ring from being damaged due to excessive friction between the piston rod and the sealing ring. Description of the Drawings

[0014] Figure 1 is a three-dimensional view of the present utility model;

[0015] Figure 2 This is a partial cross-sectional view of the present utility model;

[0016] Figure 3 This is a cross-sectional view of the lubrication mechanism in the present utility model;

[0017] Figure 4 In the present utility model Figure 3 The partial view of A shown.

[0018] In the figure:

[0019] 1. Cylinder body; 11. Cylinder block; 12. Piston rod; 2. Lubrication mechanism; 21. Housing; 211. L-channel; 212. Storage groove; 213. Extrusion block; 22. Ball; 23. Oil storage cavity; 24. Oil injection nozzle; 25. Extrusion plate; 26. Telescopic sleeve; 27. Mounting sleeve; 28. Threaded rod; 29. Tension spring; 3. Touching block; 4. Sealing ring. Specific embodiments

[0020] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Without conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0021] Please refer to Figures 1-4 , the present utility model discloses a cylinder, including a cylinder body 1 and a lubrication mechanism 2. The cylinder body 1 has a piston rod 12 that can move telescopically. A sealing ring 4 in contact with the piston rod 12 is installed on the cylinder body 1. The lubrication mechanism 2 is arranged on one side of the cylinder body 1 close to the piston rod 12. Lubricating oil is stored inside the lubrication mechanism 2, and when the lubrication mechanism 2 is started, the lubricating oil inside it is transferred to the piston rod 12.

[0022] In one embodiment, a touching block 3 is installed on the piston rod 12. The touching block 3 moves synchronously with the piston rod 12. After the touching block 3 moves to contact the moving end of the lubrication mechanism 2, the lubrication mechanism 2 discharges oil, and the lubrication mechanism 2 stops discharging oil after the touching block 3 is separated from the lubrication mechanism 2.

[0023] In specific implementation, when the piston rod 12 makes telescopic movement by starting the cylinder body 1, the trigger block 3 will also move synchronously. When the trigger block 3 moves towards the side close to the lubrication mechanism 2 until it contacts the moving end of the lubrication mechanism 2, the lubrication mechanism 2 is activated to coat the piston rod 12 with lubricating oil. At the same time, since the piston rod 12 will extend or retract from the cylinder body 1, the lubricating oil on it will be driven to contact the sealing ring 4, so as to ensure that there is always lubricating oil on the piston rod 12, which can effectively prevent the piston rod 12 from rubbing against the sealing ring 4 greatly and damaging the sealing ring 4.

[0024] In one embodiment, the cylinder body 1 further includes a cylinder block 11, and the piston rod 12 is slidably installed at the moving end of the cylinder block 11.

[0025] It should be noted that the above-mentioned cylinder body 1 and the use in cooperation with the sealing ring 4 are all well-known common knowledge in the field, so the specific structural composition and working principle thereof will not be described in detail in this text.

[0026] In one embodiment, the lubrication mechanism 2 includes a housing 21 installed on the side of the cylinder block 11 close to the piston rod 12. The center of the housing 21 is hollow for the piston rod 12 to pass through. The sealing ring 4 is embedded on the side of the housing 21 close to the cylinder block 11. A plurality of annularly distributed balls 22 are rotatably installed on the lower side of the inner wall of the housing 21, and rolling grooves are provided at the installation positions of the housing 21 and the corresponding balls 22. The balls 22 are located in the rolling grooves, and the diameter of the balls 22 is smaller than the inner diameter of the rolling grooves. Each ball 22 contacts the piston rod 12. An oil storage cavity 23 is provided inside the housing 21. An L-channel 211 is provided in the housing 21. A storage groove 212 located at the top of the L-channel 211 is also provided in the housing 21. The oil storage cavity 23, the storage groove 212, the L-channel 211 and the rolling grooves are all interconnected. An oil injection nozzle 24 interconnected with the oil storage cavity 23 is installed on the housing 21. Lubricating oil is input into the oil storage cavity 23 through the oil injection nozzle 24. An extrusion assembly is slidably provided on the housing 21.

[0027] In specific implementation, the staff first inject lubricating oil into the interior of the oil storage cavity 23 through the oil injection nozzle 24. At this time, part of the lubricating oil will enter the storage tank 212 and the L-channel 211. After the oil injection is completed, the oil injection nozzle 24 is blocked. When the piston rod 12 contracts into the cylinder block 11, it will also drive the trigger block 3 to move towards the side close to the extrusion assembly, and the trigger block 3 will extrude the extrusion assembly. The extrusion assembly moves towards the side close to the ball 22 in the oil storage cavity 23 and squeezes the lubricating oil downward, so that the lubricating oil in the oil storage cavity 23 and the storage tank 212 passes through the L-channel 211 and finally flows onto the ball 22. During the movement of the piston rod 12, it will contact the ball 22, causing the ball 22 to rotate, so that the rotating ball 22 coats the lubricating oil on it onto the piston rod 12. At this time, the lubricating oil on the piston rod 12 forms multiple strip-shaped oil channels. When the piston rod 12 retracts into the cylinder block 11, the lubricating oil will coat the inner and outer walls of the sealing ring 4 and spread around the piston rod 12 through the extrusion of the inner wall of the sealing ring 4.

[0028] It should be noted that since there is some lubricating oil in the storage tank 212, when the extrusion assembly descends, it will first squeeze the lubricating oil in the storage tank 212 into the L-channel 211 to ensure the efficiency of lubricating oil extrusion.

[0029] In one embodiment, the extrusion assembly includes a mounting sleeve 27 installed on the top wall of the housing 21. The mounting sleeve 27 communicates with the oil storage cavity 23. A telescopic sleeve 26 is slidably installed in the mounting sleeve 27. The telescopic sleeve 26 is in dynamic sealing fit with the mounting sleeve 27. A pressing plate 25 is installed at the bottom of the telescopic sleeve 26. The pressing plate 25 is located in the oil storage cavity 23. A pressing block 213 is installed at the position of the bottom of the pressing plate 25 corresponding to the storage tank 212. The pressing block 213 cooperates with the storage tank 212 to increase the oil pressure in the storage tank 212 when the pressing plate 25 descends. A tension spring 29 is installed on the pressing plate 25. The end of the tension spring 29 away from the pressing plate 25 is connected to the inner top wall of the housing 21 corresponding to the oil storage cavity 23.

[0030] In specific implementation, when the trigger block 3 extrudes the extrusion assembly, it will push the telescopic sleeve 26 and make it and the pressing plate 25 move towards the side close to the ball 22, so that the pressing plate 25 extrudes the lubricating oil. During this process, the pressing block 213 will move into the storage tank 212, further squeezing the lubricating oil in the storage tank 212 into the L-channel 211 and making the lubricating oil finally flow onto the ball 22. At the same time, the tension spring 29 will expand. When the trigger block 3 leaves the extrusion assembly, the expanded tension spring 29 retracts, driving the pressing plate 25 and the telescopic sleeve 26 to reset. In actual situations, the diameter of the pressing block 213 is slightly smaller than the inner diameter of the storage tank 212. Therefore, the pressing block 213 can normally enter the storage tank 212 to extrude the lubricating oil, and the pressing block 213 will not be difficult to reset due to being sucked in the storage tank 212 when resetting.

[0031] In one embodiment, a threaded groove is provided inside the telescopic sleeve 26, and a threaded rod 28 that is in threaded engagement therewith is provided in the threaded groove.

[0032] With such a design, rotating the threaded rod 28 can cause it to move in the threaded groove, thereby changing the distance between this position and the trigger block 3. When the distance becomes smaller, the distance that the trigger block 3 pushes the extrusion assembly to move becomes longer, so that the oil output of the lubricating oil becomes more. On the contrary, when the distance becomes smaller, the distance that the trigger block 3 pushes the extrusion assembly to move becomes shorter, so that the oil output of the lubricating oil becomes less. Therefore, the required oil output can be freely adjusted according to actual needs.

[0033] In actual situations, a corresponding sensor assembly can be provided inside the oil storage cavity 23. This sensor assembly is used to detect the oil quantity inside the oil storage cavity 23 and send a signal when the oil quantity reaches the threshold, so as to facilitate the staff to refuel the inside of the oil storage cavity 23. And this sensor assembly belongs to the common knowledge in the art, so the specific structural composition and working principle thereof will not be elaborated too much in this text.

[0034] It should be noted that if there are directional indications (such as up, down, left, right, front, back...) involved in the embodiments of the present invention, then such directional indications are only used to explain the relative positional relationship and movement conditions between components in a certain specific posture (as shown in the drawings). If this specific posture changes, then the directional indications will also change accordingly.

[0035] In addition, if there are descriptions such as "first", "second", etc. involved in the embodiments of the present invention, then such descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the present invention.

[0036] In addition, "a plurality" means two or more.

[0037] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims

1. Cylinder, characterized in that: include, A cylinder body (1) having a telescopic piston rod (12), wherein a sealing ring (4) in contact with the piston rod (12) is arranged on the cylinder body (1); A lubricating mechanism (2) is arranged on a side of the cylinder body (1) close to the piston rod (12), wherein lubricating oil is stored inside the lubricating mechanism (2), and when started, the lubricating oil inside the lubricating mechanism (2) is transferred to the piston rod (12); A trigger block (3) is arranged on the piston rod (12). The trigger block (3) moves synchronously with the movement of the piston rod (12). When the trigger block (3) moves to the moving end contacting the lubricating mechanism (2), the lubricating mechanism (2) discharges oil. When the trigger block (3) separates from the lubricating mechanism (2), the lubricating mechanism (2) stops discharging oil.

2. The cylinder according to claim 1, characterized in that: The cylinder body (1) further comprises a cylinder body (11), and the piston rod (12) is slidably arranged at the moving end of the cylinder body (11).

3. The cylinder according to claim 2, characterized in that: The lubrication mechanism (2) comprises a housing (21) arranged on a side of the cylinder body (11) close to the piston rod (12), the center of the housing (21) being hollow for the piston rod (12) to pass through, the sealing ring (4) being embedded in the side of the housing (21) close to the cylinder body (11), a plurality of balls (22) distributed in an annular shape being rotatably arranged on the lower side of the inner wall of the housing (21), and rolling grooves being provided at the mounting positions of the housing (21) and the corresponding balls (22), the balls (22) being located in the rolling grooves, and the diameters of the balls (22) being smaller than the inner diameters of the rolling grooves, and each of the balls (22) being in contact with the piston rod (12), an oil storage chamber (23) being provided inside the housing (21), an L channel (211) being provided inside the housing (21), and a plurality of balls (22) being provided in the L channel. The storage groove (212) is disposed at the top of the channel (211); the oil storage chamber (23), the storage groove (212), the L channel (211) and the rolling groove are all interconnected; the housing (21) is provided with an oil injection nozzle (24) which is interconnected with the oil storage chamber (23); the lubricating oil is input into the oil storage chamber (23) through the oil injection nozzle (24); the housing (21) is provided with an extrusion assembly which can slide up and down; when the piston rod (12) contracts into the cylinder body (11), the trigger block (3) is driven to move toward a side close to the extrusion assembly and causes it to squeeze the extrusion assembly, so that the extrusion assembly squeezes the lubricating oil downwards and causes the lubricating oil to flow onto the ball (22); the movement of the piston rod (12) causes the ball (22) in contact with the piston rod (12) to rotate; the rotating ball (22) applies the lubricating oil thereon to the piston rod (12).

4. The cylinder according to claim 3, characterized in that: The extrusion assembly comprises a mounting sleeve (27) arranged on the top wall of the housing (21), the mounting sleeve (27) being communicated with the oil storage chamber (23), a telescopic sleeve (26) being slidably arranged in the mounting sleeve (27), the telescopic sleeve (26) and the mounting sleeve (27) being dynamically sealed, an extrusion plate (25) being arranged at the bottom of the telescopic sleeve (26), the extrusion plate (25) being located in the oil storage chamber (23), an extrusion block (213) being arranged at the bottom of the extrusion plate (25) at a position corresponding to the storage groove (212), the extrusion block (213) being matched with the storage groove (212) and being used for increasing the oil pressure in the storage groove (212) when the extrusion plate (25) descends, and a tension spring (29) being arranged on the extrusion plate (25), the end of the tension spring (29) being away from the extrusion plate (25) being connected to the top wall of the housing (21) corresponding to the oil storage chamber (23).

5. The cylinder according to claim 4, characterized in that: A thread groove is provided inside the telescopic sleeve (26), and a thread rod (28) threadably matched therewith is arranged in the thread groove.

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