Hydraulic oil cylinder with buffering and current limiting capabilities

Abstract

The utility model discloses a hydraulic oil cylinder with buffering and current limiting capabilities, and relates to the field of hydraulic oil cylinders. The hydraulic oil cylinder with the buffering and flow limiting capacity comprises a mounting assembly, a cylinder body is fixedly connected to the top of the mounting assembly, a first hydraulic valve hole is formed in the bottom of the outer side of the cylinder body, a flow limiting assembly is clamped to the first hydraulic valve hole, an oil supply pipe is clamped to the inner side of the first hydraulic valve hole, and a flow limiting pipe is fixedly connected to the side, away from the first hydraulic valve hole, of the oil supply pipe; a pressure sensor is fixedly installed on the inner side of the flow limiting pipe, a blocking valve groove is formed in the inner side of the oil feeding pipe, a blocking valve is slidably connected to the inner side of the blocking valve groove, a valve hole is formed in the outer side of the oil feeding pipe, a motor is fixedly connected to the end, away from the blocking valve, of the connecting rod, and a set of supporting plates are fixedly connected to the outer side of the motor. The transmission rod can achieve a good damping effect when stretching out and retracting back, and damage to the cylinder body caused by high acting speed and high impact force of the transmission rod is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of hydraulic oil cylinders, in particular to a hydraulic oil cylinder with buffering and current limiting capabilities. Background Art

[0002] The hydraulic cylinder is the actuator in the hydraulic transmission system. It is an energy conversion device that converts hydraulic energy into mechanical energy. The hydraulic cylinder realizes reciprocating motion. In addition to being used individually, the hydraulic cylinder can also be combined in two or more or in combination with other mechanisms to complete special functions. The hydraulic cylinder has a simple structure and reliable operation. It has a wide range of applications in machine tools and other fields. Traditional hydraulic cylinders are very simple and do not have the ability to buffer and limit current. Therefore, the service life of the hydraulic cylinder is greatly reduced and the cost of use is increased.

[0003] Among them, the publication number "CN217539172U" discloses "a hydraulic cylinder with buffering and flow limiting capabilities". This hydraulic cylinder provides an idea of ​​setting a shock-absorbing structure and a flow-limiting structure from the aspects of buffering and flow limiting, and has high practicality. However, this hydraulic cylinder still has certain shortcomings in actual use, because the shock-absorbing structure provided by this hydraulic cylinder only takes into account the impact force caused by the retraction of the transmission rod, and takes shock-absorbing measures on the bottom of the inner side of the cylinder body, but does not take into account the high impact force when the transmission rod is extended, and takes shock-absorbing measures on the top of the inner side of the cylinder body. Moreover, the flow-limiting structure of this hydraulic cylinder is a traditional mechanical structure, which uses the pressure in the cylinder body to increase and push the movable block to move the reset spring to block the oil inlet. However, this traditional mechanical method is very demanding on the quality of the reset spring. When the reset spring is aged or lacks elasticity, the hydraulic cylinder will be unable to continue working, thereby causing losses. Therefore, this hydraulic cylinder still has a certain room for optimization. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model provides a hydraulic oil cylinder with buffering and flow limiting capabilities, which solves the problems of flow limiting and buffering of the hydraulic oil cylinder.

[0005] To achieve the above objectives, the utility model is implemented through the following technical solutions: a hydraulic cylinder with buffering and flow limiting capabilities, including a mounting assembly, the top of the mounting assembly is fixedly connected to a cylinder body, a first hydraulic valve hole is opened at the bottom of the outer side of the cylinder body, a second hydraulic valve hole is opened at the top of the outer side of the cylinder body, the first hydraulic valve hole is clamped with a flow limiting assembly, the flow limiting assembly includes a flow limiting pipe, an oil inlet pipe, an oil supply pipe, a pressure sensor, a blocking valve, a valve hole, a motor, a support plate, a blocking valve slot, and a connecting rod, the inner side of the first hydraulic valve hole is clamped with an oil supply pipe, the The oil supply pipe is fixedly connected to a limiting flow pipe on the side away from the first hydraulic valve hole, the outer side of the limiting flow pipe is fixedly connected to an oil inlet pipe, the inner side of the limiting flow pipe is fixedly installed with a pressure sensor, the inner side of the oil supply pipe is provided with a blocking valve groove, the inner side of the blocking valve groove is slidably connected with a blocking valve, the outer side of the oil supply pipe is provided with a valve hole, the valve hole is slidably connected with a connecting rod, one end of the connecting rod is fixedly connected to the blocking valve, the end of the connecting rod away from the blocking valve is fixedly connected to a motor, the outer side of the motor is fixedly connected to a group of support plates, and the bottom of the support plate is fixedly connected to the outer side of the oil supply pipe.

[0006] Preferably, an opening is provided at the top of the cylinder body, a transmission rod is slidably connected to the inner side of the cylinder body, and the transmission rod passes through the opening.

[0007] Preferably, a piston ring is fixedly installed on the outer side of the transmission rod, a shock absorbing assembly is fixedly installed on the outer side of the transmission rod, the shock absorbing assembly includes a first mounting ring, a rubber buffer pad, a second mounting ring, a spring, and a spring top ring, the first mounting ring is fixedly installed on the outer side of the transmission rod, a rubber buffer pad is fixedly connected to the bottom of the first mounting ring, the second mounting ring is fixedly installed on the outer side of the transmission rod, a spring is fixedly installed on the top of the second mounting ring, and a spring top ring is fixedly installed on the top of the spring.

[0008] Preferably, the mounting assembly includes a mounting base, a nut, and a threaded hole. A plurality of threaded holes are provided on the top of the mounting base, and a plurality of the threaded holes are threadedly connected with nuts.

[0009] Preferably, the pressure sensor is electrically connected to the motor.

[0010] Preferably, the first mounting ring is located at the bottom of the piston ring, and the second mounting ring is located at the top of the piston ring.

[0011] Beneficial Effects

[0012] The utility model provides a hydraulic cylinder with buffering and flow limiting capabilities. Compared with the prior art, it has the following beneficial effects:

[0013] (1) The hydraulic cylinder with buffering and flow limiting capability can collect data through the pressure sensor when the pressure in the cylinder is too high by setting up a flow limiting component, and then use the motor to rotate the blocking valve to prevent the operation of further filling the cylinder with oil. The benefit of this setting is that the mechanical structure is replaced by electrical operation, which prevents adverse consequences caused by aging or failure of a certain mechanical structure, and greatly reduces the cost of using the hydraulic cylinder.

[0014] (2) The hydraulic cylinder with buffering and flow limiting capabilities can achieve better shock absorbing effect when the transmission rod is extended and retracted by setting up a shock absorbing component on the outside of the transmission rod, thereby preventing the transmission rod from damaging the cylinder body due to fast working speed and high impact force. BRIEF DESCRIPTION OF THE DRAWINGS

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

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

[0017] Figure 3 It is a schematic diagram of the cross-sectional exploded structure of the current limiting component of the utility model.

[0018] In the figure: 1-installation assembly, 101-installation base, 102-nut, 103-threaded hole, 2-cylinder body, 3-first hydraulic valve hole, 4-transmission rod, 5-piston ring, 6-shock absorber assembly, 601-first mounting ring, 602-rubber buffer pad, 603-second mounting ring, 604-spring, 605-spring top ring, 7-opening, 8-second hydraulic valve hole, 9-current limiting assembly, 901-current limiting pipe, 902-oil inlet pipe, 903-oil supply pipe, 904-pressure sensor, 905-blocking valve, 906-valve hole, 907-motor, 908-support plate, 909-blocking valve slot, 910-connecting rod. DETAILED DESCRIPTION

[0019] 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.

[0020] See also Figure 1-3The utility model provides a technical solution: a hydraulic oil cylinder with buffering and flow limiting capabilities, including a mounting assembly 1, a cylinder body 2 is fixedly connected to the top of the mounting assembly 1, a first hydraulic valve hole 3 is opened at the bottom of the outer side of the cylinder body 2, a second hydraulic valve hole 8 is opened at the top of the outer side of the cylinder body 2, the first hydraulic valve hole 3 is clamped with a flow limiting assembly 9, the flow limiting assembly 9 includes a flow limiting pipe 901, an oil inlet pipe 902, an oil supply pipe 903, a pressure sensor 904, a blocking valve 905, a valve hole 906, a motor 907, a support plate 908, a blocking valve slot 909, and a connecting rod 910, the inner side of the first hydraulic valve hole 3 is clamped with an oil supply pipe 903, and the oil supply pipe 903 is away from the first hydraulic valve hole 3. A limiting flow tube 901 is fixedly connected to the side, an oil inlet pipe 902 is fixedly connected to the outer side of the limiting flow tube 901, a pressure sensor 904 is fixedly installed on the inner side of the limiting flow tube 901, a blocking valve groove 909 is opened on the inner side of the oil supply pipe 903, a blocking valve 905 is slidably connected to the inner side of the blocking valve groove 909, a valve hole 906 is opened on the outer side of the oil supply pipe 903, a connecting rod 910 is slidably connected to the valve hole 906, one end of the connecting rod 910 is fixedly connected to the blocking valve 905, and the end of the connecting rod 910 away from the blocking valve 905 is fixedly connected to a motor 907, a group of support plates 908 are fixedly connected to the outer side of the motor 907, and the bottom of the support plate 908 is fixedly connected to the outer side of the oil supply pipe 903.

[0021] In this embodiment, an opening 7 is formed on the top of the cylinder body 2 , and a transmission rod 4 is slidably connected to the inner side of the cylinder body 2 , and the transmission rod 4 passes through the opening 7 .

[0022] Specifically, when in use, the transmission rod 4 completes the reciprocating motion of extending and retracting through the opening 7 .

[0023] In this embodiment: a piston ring 5 is fixedly installed on the outer side of the transmission rod 4, a shock absorbing assembly 6 is fixedly installed on the outer side of the transmission rod 4, the shock absorbing assembly 6 includes a first mounting ring 601, a rubber buffer pad 602, a second mounting ring 603, a spring 604, and a spring top ring 605, the first mounting ring 601 is fixedly installed on the outer side of the transmission rod 4, the rubber buffer pad 602 is fixedly connected to the bottom of the first mounting ring 601, the second mounting ring 603 is fixedly installed on the outer side of the transmission rod 4, the spring 604 is fixedly installed on the top of the second mounting ring 603, and the spring top ring 605 is fixedly installed on the top of the spring 604.

[0024] Specifically, when in use, the shock absorbing assembly 6 can make the first mounting ring 601 and the rubber buffer pad 602 cushion the impact force of the transmission rod 4 when it is retracted. When the transmission rod 4 is extended, the spring top ring 605 contacts the top of the inner side of the cylinder body 2, and the spring cushions the impact force caused by the extension of the transmission rod 4, thereby protecting the cylinder body 2 to the greatest extent and greatly increasing the service life of the hydraulic cylinder.

[0025] In this embodiment, the mounting assembly 1 includes a mounting base 101 , a nut 102 , and threaded holes 103 . A plurality of threaded holes 103 are provided on the top of the mounting base 101 , and the nuts 102 are threadedly connected to the plurality of threaded holes 103 .

[0026] Specifically, when in use, the hydraulic cylinder is fixedly installed at a desired position through the nut 102 and the threaded hole 103 on the mounting base 101 .

[0027] In this embodiment: the pressure sensor 904 is electrically connected to the motor 907 .

[0028] Specifically, when in use, the pressure sensor 904 is electrically connected to the motor 907 so that the pressure signal received by the pressure sensor 904 can be fed back to the motor 907 in a timely manner, so that the motor can promptly open the shut-off valve 905 to stop supplying oil, so as to avoid excessive pressure in the cylinder body and damage to the cylinder body.

[0029] In this embodiment, the first mounting ring 601 is located at the bottom of the piston ring 5 , and the second mounting ring 603 is located at the top of the piston ring 5 .

[0030] Specifically, when in use, the first mounting ring 601 cooperates with the rubber buffer pad 602 to protect the inner bottom of the cylinder body 2 , and the second mounting ring 603 cooperates with the spring 604 and the spring top ring 605 to protect the inner top of the cylinder body 2 .

[0031] At the same time, the contents not described in detail in this specification belong to the prior art known to those skilled in the art.

[0032] Working principle: During specific work, the mounting base 101 is fixed at the designated position through the nut 102 and the threaded hole 103, and then the current limiting component 9 is installed on the first hydraulic valve hole 3 and the second hydraulic valve hole, and then the hydraulic cylinder is started. When the hydraulic cylinder starts to work, when the transmission rod 4 is extended, the second mounting ring 603, the spring 604 and the spring top ring 605 are used to buffer the impact force caused by the extension of the transmission rod 4. When the transmission rod 4 is retracted, the first mounting ring 601 and the rubber buffer pad 602 are used to buffer the impact force caused by the retraction of the transmission rod 4. When the pressure in the cylinder body 2 is large enough, the pressure sensor 904 transmits an electrical signal to the motor 607, so that the motor 907 rotates the blocking valve 905 through the connecting rod 910 to cut off the continuous oil supply to the cylinder body 2. This solves the disadvantages of the traditional hydraulic cylinder that does not have buffering and current limiting, and greatly improves the service life of the hydraulic cylinder.

[0033] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0034] Although the 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 hydraulic cylinder with buffering and flow limiting capability, comprising a mounting assembly (1), characterized in that: The top of the mounting assembly (1) is fixedly connected to a cylinder body (2), the outer bottom of the cylinder body (2) is provided with a first hydraulic valve hole (3), the outer top of the cylinder body (2) is provided with a second hydraulic valve hole (8), the first hydraulic valve hole (3) is clamped with a flow limiting assembly (9), the flow limiting assembly (9) comprises a flow limiting pipe (901), an oil inlet pipe (902), an oil supply pipe (903), a pressure sensor (904), a blocking valve (905), a valve hole (906), a motor (907), a support plate (908), a blocking valve slot (909), and a connecting rod (910), the inner side of the first hydraulic valve hole (3) is clamped with an oil supply pipe (903), the side of the oil supply pipe (903) away from the first hydraulic valve hole (3) is fixedly connected to the flow limiting pipe (901), the flow limiting pipe ( An oil inlet pipe (902) is fixedly connected to the outside of the flow limiting pipe (901), a pressure sensor (904) is fixedly installed on the inside of the flow limiting pipe (901), a blocking valve groove (909) is opened on the inside of the oil supply pipe (903), a blocking valve (905) is slidably connected to the inside of the blocking valve groove (909), a valve hole (906) is opened on the outside of the oil supply pipe (903), a connecting rod (910) is slidably connected to the valve hole (906), one end of the connecting rod (910) is fixedly connected to the blocking valve (905), and one end of the connecting rod (910) away from the blocking valve (905) is fixedly connected to a motor (907), a group of support plates (908) are fixedly connected to the outside of the motor (907), and the bottom of the support plate (908) is fixedly connected to the outside of the oil supply pipe (903).

2. A hydraulic cylinder with buffering and flow limiting capability according to claim 1, characterized in that: An opening (7) is provided at the top of the cylinder body (2), and a transmission rod (4) is slidably connected to the inside of the cylinder body (2), and the transmission rod (4) passes through the opening (7).

3. A hydraulic cylinder with buffering and flow limiting capability according to claim 2, characterized in that: A piston ring (5) is fixedly mounted on the outer side of the transmission rod (4); a shock absorbing assembly (6) is fixedly mounted on the outer side of the transmission rod (4); the shock absorbing assembly (6) comprises a first mounting ring (601), a rubber buffer pad (602), a second mounting ring (603), a spring (604), and a spring top ring (605); the first mounting ring (601) is fixedly mounted on the outer side of the transmission rod (4); the bottom of the first mounting ring (601) is fixedly connected to the rubber buffer pad (602); the second mounting ring (603) is fixedly mounted on the outer side of the transmission rod (4); the top of the second mounting ring (603) is fixedly mounted with a spring (604); and the top of the spring (604) is fixedly mounted with a spring top ring (605).

4. The hydraulic cylinder with buffering and flow limiting capability according to claim 1, characterized in that: The mounting assembly (1) comprises a mounting base (101), a nut (102), and a threaded hole (103). A plurality of threaded holes (103) are provided on the top of the mounting base (101), and a plurality of the threaded holes (103) are threadedly connected with nuts (102).

5. The hydraulic cylinder with buffering and flow limiting capability according to claim 1, characterized in that: The pressure sensor (904) is electrically connected to the motor (907).

6. The hydraulic cylinder with buffering and flow limiting capability according to claim 3, characterized in that: The first mounting ring (601) is located at the bottom of the piston ring (5), and the second mounting ring (603) is located at the top of the piston ring (5).

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