Low-noise hydraulic oil cylinder

Abstract

The utility model discloses a low-noise hydraulic oil cylinder, which belongs to the technical field of hydraulic oil cylinders and comprises a cylinder body, a lug is mounted on the inner side of the cylinder body, a piston rod is arranged on the cylinder body and positioned on one side of the lug, and a piston component is mounted on the outer side of one end, close to the lug, of the piston rod and positioned on the inner side of the cylinder body. A first oil conveying pipe is installed below the cylinder body, a second oil conveying pipe is installed below the cylinder body and located on the outer side of the first oil conveying pipe, and a temperature adjusting device is installed at the position, close to the outer side, of the cylinder body. According to the oil cylinder, the temperature adjusting device is arranged, so that the interior of the cylinder body can be cooled through the refrigerating rods when needed, the possibility that the oil cylinder is damaged due to overheating is reduced, the interior of the cylinder body can be heated through the electric heating wires when the oil cylinder is in low-temperature weather, and the service life of the oil cylinder is prolonged. Therefore, the possibility of solidification of the hydraulic oil is reduced, and the working capacity of the oil cylinder is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of hydraulic cylinders, and in particular relates to a low-noise hydraulic cylinder. Background Art

[0002] The hydraulic cylinder is an important actuator in the hydraulic system. Its function is to convert hydraulic energy into linear, swinging and reciprocating mechanical motion.

[0003] Chinese patent application No. 201820957667.4 discloses a hydraulic oil cylinder with a buffer structure, including a cylinder body, a piston, and a piston rod. One end of the cylinder body is a cylinder bottom, and the other end of the cylinder body is a cylinder head. The cylinder body between the piston, the cylinder head, and the cylinder bottom is provided with an oil inlet. A convex block perpendicular to the cylinder bottom surface is installed on the surface of the cylinder bottom facing the piston. A slot hole for inserting the convex block is provided on the surface of the piston facing the cylinder bottom. A first spring whose central axis coincides with the central axis of the cylinder body is installed in the slot hole. A buffer pad is provided inside the cylinder body between the piston and the cylinder head. The buffer pad is fixed on the surface of the piston facing the cylinder head. The piston rod passes through the center of the buffer pad. At least two limit blocks are installed on the side of the buffer pad facing the cylinder head. The limit block is located between the cylinder head and the buffer pad and the limit block protrudes outward toward the cylinder head. The utility model provides a buffer structure of the piston in the cylinder body, which can effectively avoid collision between the piston and the cylinder bottom and the cylinder head.

[0004] 1. The above-mentioned public patent has the problem of being easily damaged by overheating and the hydraulic oil solidifying in low temperature weather, thereby reducing the working capacity of the cylinder; 2. The above-mentioned public patent has the problem of being unable to reduce the noise generated during operation and the cylinder body and other structures are easily damaged, thereby reducing the practicality of the cylinder. Utility Model Content

[0005] In order to solve the problems raised in the above background technology, the utility model provides a low-noise hydraulic cylinder, which has the characteristics of high working capacity and strong practicality.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a low-noise hydraulic cylinder, comprising a cylinder body, a bump installed on the inner side of the cylinder body, a piston rod is arranged on the cylinder body and located on one side of the bump, a piston assembly is installed on the outer side of one end of the piston rod close to the bump and located on the inner side of the cylinder body, a first oil pipe is installed below the cylinder body, a second oil pipe is installed below the cylinder body and located on the outer side of the first oil pipe, a temperature regulating device is installed on the outer side of the cylinder body, and a noise reduction protection device is installed on the cylinder body and located on the outer side of the temperature regulating device.

[0007] Preferably, the temperature regulating device includes a fixed shell, an isolation ring, a refrigeration rod and a heat exchange aluminum cylinder. The heat exchange aluminum cylinder is installed on the outer side of the cylinder body, a fixed shell is installed on the cylinder body and at a position outside the heat exchange aluminum cylinder, an isolation ring is installed on the inner side of the fixed shell and at a position outside the heat exchange aluminum cylinder, and a plurality of refrigeration rods are installed on the inner side of the fixed shell and at a position on one side of the isolation ring.

[0008] Preferably, the temperature regulating device further comprises a heating wire, and a plurality of heating wires are installed on the inner side of the fixed shell and at a position on the side of the isolation ring away from the plurality of cooling rods.

[0009] Preferably, the temperature regulating device further comprises thermal insulation cotton, and the side wall of the fixed shell is filled with thermal insulation cotton.

[0010] Preferably, the noise reduction and protection device includes a threaded plate, a first sound-absorbing cotton, a second sound-absorbing cotton, a protective tube, a third sound-absorbing cotton and a movable tube. A threaded plate is installed on one side of the cylinder body and located at a position on the side of the protrusion away from the piston assembly. The inner side of the threaded plate is filled with the first sound-absorbing cotton. A protective tube is installed on the outer side of the threaded plate through a thread. The side wall of the protective tube is filled with the second sound-absorbing cotton. A movable tube is arranged on the outer side of the protective tube, and the side wall of the movable tube is filled with the third sound-absorbing cotton.

[0011] Preferably, the noise reduction protection device further comprises a connecting ring and a spring pin. The connecting ring is installed on the movable cylinder and is located on one side of the protection cylinder and outside the piston rod. The piston rod and the connecting ring are connected by two spring pins.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] 1. The utility model provides a temperature regulating device so that the oil cylinder can cool down the inside of the cylinder body through various cooling rods when needed, thereby reducing the possibility of overheating damage to the oil cylinder. In addition, the oil cylinder can heat up the inside of the cylinder body through various heating wires in low temperature weather, thereby reducing the possibility of hydraulic oil solidification and improving the working capacity of the oil cylinder.

[0014] 2. The utility model provides a noise reduction protection device so that the oil cylinder can perform a certain noise reduction treatment on the noise generated during operation through the first sound-absorbing cotton, the second sound-absorbing cotton and the third sound-absorbing cotton when necessary, and the oil cylinder can protect the cylinder body and other structures through the protective cylinder and the moving cylinder, thereby reducing the possibility of damage to the cylinder body and other structures, thereby improving the practicality of the oil cylinder. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a three-dimensional diagram of the utility model;

[0016] Figure 2 It is a schematic diagram of the structure of the utility model;

[0017] Figure 3 This is a schematic diagram of the structure of the temperature regulating device of the utility model;

[0018] Figure 4 It is a structural schematic diagram of the noise reduction protection device of the utility model.

[0019] In the figure: 1. piston rod; 2. temperature regulating device; 21. fixed shell; 22. thermal insulation cotton; 23. heating wire; 24. isolation ring; 25. cooling rod; 26. heat exchange aluminum cylinder; 3. bump; 4. first oil pipeline; 5. second oil pipeline; 6. piston assembly; 7. noise reduction protection device; 71. threaded plate; 72. first sound-absorbing cotton; 73. second sound-absorbing cotton; 74. protective cylinder; 75. third sound-absorbing cotton; 76. moving cylinder; 77. connecting ring; 78. spring pin; 8. cylinder body. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] Example 1

[0022] See also Figure 1-4 The utility model provides the following technical solutions: a low-noise hydraulic cylinder, comprising a cylinder body 8, a bump 3 is installed on the inner side of the cylinder body 8, a piston rod 1 is arranged on the cylinder body 8 and located on one side of the bump 3, a piston assembly 6 is installed on the outer side of one end of the piston rod 1 close to the bump 3 and located on the inner side of the cylinder body 8, a first oil pipeline 4 is installed below the cylinder body 8, a second oil pipeline 5 is installed below the cylinder body 8 and located on the outer side of the first oil pipeline 4, a temperature regulating device 2 is installed on the outer side of the cylinder body 8, and a noise reduction protection device 7 is installed on the cylinder body 8 and located on the outer side of the temperature regulating device 2.

[0023] Specifically, the temperature regulating device 2 includes a fixed shell 21, an isolation ring 24, a cooling rod 25 and a heat exchange aluminum cylinder 26. The heat exchange aluminum cylinder 26 is installed on the outer side of the cylinder body 8, the fixed shell 21 is installed on the cylinder body 8 and at the outer side of the heat exchange aluminum cylinder 26, the isolation ring 24 is installed on the inner side of the fixed shell 21 and at the outer side of the heat exchange aluminum cylinder 26, and a plurality of cooling rods 25 are installed on the inner side of the fixed shell 21 and at one side of the isolation ring 24.

[0024] By adopting the above technical solution, the oil cylinder can cool down the inside of the cylinder body 8 through each cooling rod 25 when needed, thereby reducing the possibility of overheating damage to the oil cylinder.

[0025] Specifically, the temperature adjustment device 2 further includes a heating wire 23 , and a plurality of heating wires 23 are installed on the inner side of the fixed shell 21 and at a position on the side of the isolation ring 24 away from the plurality of cooling rods 25 .

[0026] By adopting the above technical solution, the oil cylinder can heat the interior of the cylinder body 8 through each heating wire 23 in low temperature weather, thereby reducing the possibility of hydraulic oil solidification.

[0027] Specifically, the temperature regulating device 2 further includes thermal insulation cotton 22 , and the side wall of the fixed shell 21 is filled with the thermal insulation cotton 22 .

[0028] By adopting the above technical solution, the influence of the external temperature on the interior of the fixed shell 21 is reduced.

[0029] When this embodiment is used, when the hydraulic cylinder is needed, the cylinder is fixed at the required position, and then the various cooling rods 25 or the various heating wires 23 in the temperature regulating device 2 are started according to the temperature and other needs, so as to adjust the temperature inside the fixed shell 21, and then the interior of the fixed shell 21 and the interior of the cylinder body 8 exchange heat through the heat exchange aluminum cylinder 26, so as to prevent the cylinder from overheating or the hydraulic oil from solidifying, and then the hydraulic oil is transported through the first oil pipeline 4 and the second oil pipeline 5, thereby driving the piston assembly 6 and the piston rod 1 thereon to move, so as to work, the protrusion 3 plays a role in cooperating with the piston assembly 6, the thermal insulation cotton 22 plays a role in reducing the influence of the external temperature, and the isolation ring 24 plays a role in separating the heating wire 23 and the cooling rod 25.

[0030] Example 2

[0031] The difference between this embodiment and embodiment 1 is that the noise reduction protection device 7 includes a threaded plate 71, a first sound-absorbing cotton 72, a second sound-absorbing cotton 73, a protective tube 74, a third sound-absorbing cotton 75 and a moving tube 76. A threaded plate 71 is installed on one side of the cylinder body 8 and is located at a position on the side of the protrusion 3 away from the piston assembly 6. The inner side of the threaded plate 71 is filled with the first sound-absorbing cotton 72. A protective tube 74 is installed on the outer side of the threaded plate 71 through a thread. The side wall of the protective tube 74 is filled with the second sound-absorbing cotton 73. A moving tube 76 is arranged on the outer side of the protective tube 74. The side wall of the moving tube 76 is filled with the third sound-absorbing cotton 75.

[0032] By adopting the above technical solution, the oil cylinder can perform a certain noise reduction treatment on the noise generated during operation through the first sound-absorbing cotton 72, the second sound-absorbing cotton 73 and the third sound-absorbing cotton 75 when necessary, and the oil cylinder can protect the cylinder body 8 and other structures through the protective cylinder 74 and the moving cylinder 76, thereby reducing the possibility of damage to the cylinder body 8 and other structures.

[0033] Specifically, the noise reduction protection device 7 also includes a connecting ring 77 and a spring pin 78. The connecting ring 77 is installed on the movable cylinder 76 and is located on one side of the protection cylinder 74 and outside the piston rod 1. The piston rod 1 and the connecting ring 77 are connected by two spring pins 78.

[0034] By adopting the above technical solution, the staff can load and unload the moving cylinder 76 when necessary.

[0035] When this embodiment is used, when it is necessary to reduce the noise during operation, the protective tube 74 in the noise reduction protection device 7 is connected to the threaded plate 71 on the cylinder body 8 through a thread, and then the moving tube 76 is put on the protective tube 74, and the piston rod 1 is connected to the connecting ring 77 through two spring pins 78, and then the noise is reduced through the first sound-absorbing cotton 72, the second sound-absorbing cotton 73 and the third sound-absorbing cotton 75. The moving tube 76 and the protective tube 74 can provide certain protection for the cylinder body 8 and other structures.

[0036] The structure and principle of the piston rod 1, the protrusion 3, the piston assembly 6 composed of the piston, the slot, the first spring, the buffer pad, the limit block and the second spring, and the cylinder body 8 in the utility model have been disclosed in the hydraulic oil cylinder with a buffer structure disclosed in Chinese Patent Application No. 201820957667.4. Its working principle is that when the piston moves toward the bottom of the cylinder, as the piston approaches, the protrusion will enter the slot. After the protrusion enters the slot, the piston continues to move toward the bottom of the cylinder. The protrusion and the piston jointly compress the first spring in the slot, and the first spring is deformed, which can reduce the speed of the piston and play a buffering role on the piston. The closer the piston is to the bottom of the cylinder, the slower its movement speed is, and the spring can disperse the force of Huasai acting on the protrusion. In addition, the first spring is between the protrusion and the slot, and the first spring has a certain deformation limit. After the spring is compressed to a certain extent, it will not deform again, so that when the piston moves to a point where it cannot move, there will be a gap between it and the bottom of the cylinder, and it will not contact the bottom of the cylinder, thereby preventing a violent collision. The utility model utilizes the first spring, the protrusion, and the slot hole to achieve buffering between the piston and the cylinder bottom, reduces the moving speed of the piston, disperses the force of the piston acting on the protrusion, and prevents the piston from contacting the cylinder bottom, thereby having a better buffering effect than the existing buffer sleeve; the utility model utilizes the buffer pad and the limit block to play a buffering role between the piston and the cylinder head. When the piston moves toward the cylinder head, the limit block contacts the cylinder head first, and the contact area between the limit block and the cylinder head is small. After the limit block contacts the cylinder head, the piston can only be compressed on the buffer pad during continued movement. The force of the piston acting on the buffer pad will be weakened by the buffer pad. When the buffer pad acts on the cylinder head through the limit block, the weakened force will be further weakened, thereby playing a good buffering role. The buffer pad and the limit block can prevent the piston from contacting the cylinder head and preventing them from colliding violently; after the limit block contacts the cylinder head, the piston continues to move to compress the second spring. The second spring has the effect of deceleration and buffering, which can not only strengthen the buffering effect of the buffer pad, but also extend the service life of the buffer pad. The second spring can make all parts of the piston bear force evenly, thus preventing the piston from cracking due to uneven force.

[0037] The structure and principle of the refrigeration rod 25 in the utility model have been disclosed in a high-temperature cooling device in a kiln for producing light calcium carbonate disclosed in Chinese patent application No. 202022664354.X, and its working principle is to cool the surroundings after power is turned on.

[0038] The working principle and use process of the utility model are as follows: when the hydraulic cylinder needs to be used, the cylinder is fixed at the required position, and then the cooling rods 25 or the heating wires 23 in the temperature regulating device 2 are started according to the temperature and other needs, so as to adjust the temperature in the fixed shell 21, and then the interior of the fixed shell 21 and the interior of the cylinder body 8 exchange heat through the heat exchange aluminum cylinder 26, so as to prevent the cylinder from overheating or the hydraulic oil from solidifying, and then the hydraulic oil is transported through the first oil delivery pipe 4 and the second oil delivery pipe 5, thereby driving the piston assembly 6 and the piston rod 1 thereon to move, so as to work, and the protrusion 3 plays a role in cooperating with the piston assembly 6 The insulation cotton 22 plays a role in reducing the influence of external temperature, and the isolation ring 24 plays a role in isolating the heating wire 23 and the cooling rod 25; when it is necessary to reduce the noise during operation, the protective tube 74 in the noise reduction protection device 7 is connected to the threaded plate 71 on the cylinder body 8 through a thread, and then the moving tube 76 is put on the protective tube 74, and the piston rod 1 is connected to the connecting ring 77 through two spring pins 78, and then the noise is reduced by the first sound-absorbing cotton 72, the second sound-absorbing cotton 73 and the third sound-absorbing cotton 75. The moving tube 76 and the protective tube 74 can provide certain protection for the cylinder body 8 and other structures.

[0039] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A low-noise hydraulic cylinder, comprising a cylinder body, characterized in that: A bump is installed on the inner side of the cylinder body, a piston rod is provided on the cylinder body and at a position on one side of the bump, a piston assembly is installed on the outer side of one end of the piston rod close to the bump and at a position inside the cylinder body, a first oil pipeline is installed below the cylinder body, a second oil pipeline is installed below the cylinder body and at a position outside the first oil pipeline, a temperature regulating device is installed on the outer side of the cylinder body, and a noise reduction protection device is installed on the cylinder body and at a position outside the temperature regulating device.

2. A low noise hydraulic cylinder according to claim 1, characterized in that: The temperature regulating device includes a fixed shell, an isolation ring, a refrigeration rod and a heat exchange aluminum cylinder. The heat exchange aluminum cylinder is installed on the outer side of the cylinder body, the fixed shell is installed on the cylinder body and located on the outer side of the heat exchange aluminum cylinder, the isolation ring is installed on the inner side of the fixed shell and located on the outer side of the heat exchange aluminum cylinder, and multiple refrigeration rods are installed on the inner side of the fixed shell and located on one side of the isolation ring.

3. A low noise hydraulic cylinder according to claim 2, characterized in that: The temperature regulating device also includes a heating wire, and a plurality of heating wires are installed on the inner side of the fixed shell and at a position on the side of the isolation ring away from the plurality of cooling rods.

4. A low noise hydraulic cylinder according to claim 2, characterized in that: The temperature regulating device also includes thermal insulation cotton, and the side wall of the fixed shell is filled with thermal insulation cotton.

5. A low noise hydraulic cylinder according to claim 2, characterized in that: The noise reduction and protection device includes a threaded plate, a first sound-absorbing cotton, a second sound-absorbing cotton, a protective tube, a third sound-absorbing cotton and a moving tube. A threaded plate is installed on one side of the cylinder body and located at a position on the side of the protrusion away from the piston assembly. The inner side of the threaded plate is filled with the first sound-absorbing cotton. A protective tube is installed on the outer side of the threaded plate through a thread. The side wall of the protective tube is filled with the second sound-absorbing cotton. A moving tube is arranged on the outer side of the protective tube, and the side wall of the moving tube is filled with the third sound-absorbing cotton.

6. A low noise hydraulic cylinder according to claim 5, characterized in that: The noise reduction protection device also includes a connecting ring and a spring pin. The connecting ring is installed on the moving cylinder and located on one side of the protection cylinder and outside the piston rod. The piston rod and the connecting ring are connected by two spring pins.

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