Hydraulic oil cylinder with cylinder body protection structure

Abstract

The invention relates to the field of hydraulic cylinders, in particular to a hydraulic oil cylinder with a cylinder body protection structure, which comprises a cylinder body, an access assembly and a filter assembly, three pressure relief protection cavities and three heat dissipation cavities are symmetrically formed in the cylinder body, the pressure relief protection cavities and the heat dissipation cavities are arranged in a staggered manner, and the centers in the three pressure relief protection cavities are communicated with separation communicating pipes; the connecting-in assembly comprises two main connectors and two mounting threaded rings, when the cylinder body is normally used, the cooling cavity and the filtering assembly are matched, the using state of the cylinder body can be protected, the normal using stability of the cylinder body is ensured, and when the cylinder body is used in an overload mode or a hydraulic system has an oil supply fault, the supporting protection assembly is disconnected, so that the cylinder body is protected. Hydraulic oil in the cylinder body is guided and collected, the cylinder body is prevented from being exploded, the supporting and protecting assembly can be conveniently replaced, stable connection of the main connector and the mounting threaded ring can be kept, and the use safety of the cylinder body is protected.

Description

Technical Field

[0001] The present invention relates to the field of hydraulic cylinders, in particular to a hydraulic oil cylinder with a cylinder body protection structure. 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 using it to achieve reciprocating motion, the deceleration device can be eliminated, and there is no transmission gap and the movement is smooth. Therefore, it is widely used in the hydraulic systems of various machines. When in use, the hydraulic cylinder needs to be connected to the hydraulic system at both ends. When the hydraulic cylinder is in use, if the hydraulic system fails or the usage scenario exceeds the load-bearing capacity of the hydraulic cylinder, the hydraulic oil in the cylinder will be at risk of overflowing or even exploding. After long-term use, the internal hydraulic oil of the hydraulic cylinder will be contaminated and overheated, thereby affecting the normal use of the hydraulic cylinder. Summary of the Invention

[0003] The object of the present invention is to provide a hydraulic cylinder with a cylinder protection structure to solve the problems raised in the above background technology.

[0004] To achieve the above-mentioned object, the present invention provides the following technical solution: a hydraulic cylinder with a cylinder protection structure, comprising: The cylinder body has three pressure relief protection chambers and three heat dissipation chambers symmetrically formed therein. The pressure relief protection chambers and the heat dissipation chambers are staggered, and the centers of the three pressure relief protection chambers are connected by a separating connecting pipe; Access assembly, the access assembly includes two main joints and two mounting threaded rings, the two main joints are symmetrically arranged at the upper and lower ends of one of the pressure relief protection chambers of the cylinder body, and the two mounting threaded rings are respectively inserted into the two main joints through threads; A filter assembly, comprising a connecting inner tube, a connecting pipe, and a filter ball shell, wherein the connecting inner tube is disposed in the main joint, the connecting pipe is disposed in the mounting threaded ring, and the filter ball shell is disposed between the connecting inner tube and the connecting pipe; A support and protection component is provided, wherein the support and protection component is movably connected to the inner tube, and the support and protection component includes a first sealing ring and a second sealing ring. A main support ring and a plurality of elastic support rods are provided on the side of the first sealing ring close to the second sealing ring, and a transfer protection hole is provided on the side of the main joint located in the pressure relief protection chamber.

[0005] Preferably, a plurality of heat dissipation fins are vertically provided on the upper and lower sides of the separating connecting tube in the heat dissipation cavity, the upper and lower ends of the heat dissipation cavity are respectively open, and both ends of the cylinder body cover the heat dissipation cavity and are sleeved with annular filter cotton.

[0006] Preferably, a support plate is provided on one side of the connecting inner tube, the support plate is flush with the inner wall of the cylinder body, an annular cavity is sandwiched between the outer circumference of the connecting inner tube and the inner circumference of the main joint, and the annular cavity is connected to the cylinder body and a plurality of connecting grooves are opened.

[0007] Preferably, an internal thread groove is provided on one side of the annular cavity of the main joint, and the installation thread ring is connected to the annular cavity of the inner tube by threaded insertion of the main joint.

[0008] Preferably, a combination groove is provided on the inner circumference of the connecting inner tube away from the inner cavity of the cylinder, an access handle is provided on one side of the threaded ring, the connecting tube is horizontally arranged at the center of the access handle, and one side of the connecting tube is inserted into the combination groove of the connecting inner tube.

[0009] Preferably, a ball groove is provided on one side of the combined groove and on the side of the connecting pipe connected to the inner pipe, and the filter ball shell is inserted into the two ball grooves.

[0010] Preferably, the first sealing ring and the second sealing ring are both inserted into the annular cavity, and a plurality of elastic support rods are symmetrically arranged between the first sealing ring and the second sealing ring. The plurality of elastic support rods are respectively arranged non-contactly on the inner and outer sides of the main support ring.

[0011] Preferably, a plurality of position retaining grooves are provided on one side of the connecting inner tube located in the annular cavity, and one side of a plurality of elastic support rods located on the inner side of the main support ring are movably inserted into the plurality of position retaining grooves respectively.

[0012] Preferably, one side of the main support ring is arranged in non-contact with the second sealing ring. When the first sealing ring squeezes the elastic support rod and pushes the main support ring to contact the second sealing ring, the transfer protection hole will not be connected to the inner cavity of the cylinder body.

[0013] Preferably, the mounting threaded ring is provided with a plurality of slots on the side close to the second sealing ring, and the second sealing ring is provided with a constraint block on the side close to the slot, and the plurality of constraint blocks are respectively inserted into the plurality of slots, and the side surfaces of the constraint blocks inserted into the slots are all inclined surfaces, and an annular pressure groove is provided on the side of the access handle away from the second sealing ring, and a release ring is movably provided in the annular pressure groove, and a plurality of release rods are symmetrically provided on one side of the release ring, and one side of the plurality of release rods are respectively movably inserted into the plurality of slots and in contact with the constraint block, and a release nut is provided on the side of the connecting pipe located on the release ring through a threaded sleeve, and one side of the release nut is in contact with the release ring.

[0014] Compared with the prior art, the present invention has the following beneficial effects: When the cylinder is in normal use, the heat dissipation cavity and the filter assembly can protect the use status of the cylinder and ensure the normal use stability of the cylinder. When the cylinder is overloaded or the hydraulic system fails to deliver oil, the support protection assembly can be disconnected to guide and collect the hydraulic oil in the cylinder to avoid the cylinder explosion problem. The support protection assembly can be easily replaced and can also maintain a stable connection between the main joint and the mounting threaded ring to protect the safe use of the cylinder. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention; Figure 2 This is a schematic diagram of the partial episiotomy structure of the present invention; Figure 3 For the present invention Figure 2 Schematic diagram of part A; Figure 4 For the present invention Figure 3 Schematic diagram of part B; Figure 5 For the present invention Figure 4 Schematic diagram of the C part; Figure 6 For the present invention Figure 2 Schematic diagram of the D part; Figure 7 This is a schematic diagram of the position relationship of the heat dissipation cavity of the present invention; Figure 8 This is a schematic diagram of the connection and coordination of the support and protection components of the present invention; Figure 9 This is a schematic diagram of the support and protection component structure of the present invention.

[0016] In the figure: cylinder body 1, pressure relief protection chamber 2, heat dissipation chamber 3, heat dissipation fins 4, separation connection pipe 5, annular filter cotton 6, main joint 7, connection inner pipe 8, connection groove 9, installation thread ring 10, connection pipe 11, ball groove 13, filter ball shell 14, first sealing ring 15, second sealing ring 16, position holding groove 17, elastic support rod 18, main support ring 19, breaking groove 20, card slot 21, constraint block 22, access handle 23, release ring 24, release nut 25, release rod 26, transfer protection hole 27. DETAILED DESCRIPTION

[0017] In order to clearly and completely describe the objectives and technical solutions of the present invention and make the advantages more clearly understood, the embodiments of the present invention are further described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are part of the embodiments of the present invention, not all of them, and are only used to explain the embodiments of the present invention, not to limit the embodiments of the present invention. All other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0018] See also Figures 1-9 , the present invention provides the following technical solutions: Embodiment 1: A hydraulic oil cylinder with a cylinder body protection structure includes a cylinder body 1, three pressure relief protection chambers 2 and three heat dissipation chambers 3 are symmetrically opened in the cylinder body 1, the pressure relief protection chamber 2 and the heat dissipation chamber 3 are staggered, and the three pressure relief protection chambers 2 are centrally connected with a separation connection pipe 5, and a plurality of heat dissipation fins 4 are vertically provided on the upper and lower sides of the separation connection pipe 5 in the heat dissipation chamber 3, and the upper and lower ends of the heat dissipation chamber 3 are respectively open, and both ends of the cylinder body 1 cover the heat dissipation chamber 3 and are sleeved with an annular filter cotton 6. When the cylinder body 1 is in normal use, the working temperature of the hydraulic oil in the cylinder body 1 can be effectively dissipated through the three heat dissipation chambers 3 and the plurality of heat dissipation fins 4, and the annular filter cotton 6 can prevent the heat dissipation fins 4 in the heat dissipation chamber 3 from being contaminated too quickly.

[0019] An access component is provided for connecting the hydraulic oil in the cylinder body 1. The access component includes two main joints 7 and two mounting threaded rings 10. The two main joints 7 are symmetrically arranged at the upper and lower ends of one of the pressure relief protection chambers 2 of the cylinder body 1. The two mounting threaded rings 10 are respectively inserted into the two main joints 7 through threads. A support plate is provided on one side of the connected inner tube 8. The support plate is flush with the inner wall of the cylinder body 1. An annular cavity is clamped between the outer peripheral side of the connected inner tube 8 and the inner peripheral side of the main joint 7, and the annular cavity is connected to the cylinder body 1. Several connecting grooves 9 are opened in the cylinder body 1. An internal thread groove is opened on one side of the annular cavity of the main joint 7. The mounting threaded ring 10 is threadedly inserted into the main joint 7 and the annular cavity of the connected inner tube 8. When the mounting threaded ring 10 is inserted into the main joint 7, the connected inner tube 8 will also be sleeved. Even if the hydraulic oil leaks from the connected inner tube 8, it will first pass through the blockage of the main joint 7.

[0020] A filter assembly is provided to filter the hydraulic oil entering the cylinder body 1. The filter assembly includes a connecting inner tube 8, a connecting tube 11 and a filter ball shell 14. The connecting inner tube 8 is provided in the main joint 7. The connecting tube 11 is provided in the mounting threaded ring 10. The filter ball shell 14 is provided between the connecting inner tube 8 and the connecting tube 11. A combination groove is provided on the inner peripheral side of the connecting inner tube 8 away from the inner cavity of the cylinder body 1. An access handle 23 is provided on one side of the mounting threaded ring 10. The connecting tube 11 is horizontally provided at the center of the access handle 23, and one side of the connecting tube 11 is provided with a filter ball shell 14. Inserted into the combination groove of the connecting inner tube 8, a ball groove 13 is provided on one side of the combination groove and the side of the connecting tube 11 inserted into the connecting inner tube 8, and the filter ball shell 14 is inserted into the two ball grooves 13. When the connecting tube 11 sends hydraulic oil into the connecting inner tube 8 and the cylinder body 1, the filter ball shell 14 can rotate in the ball groove 13. At this time, large particle pollutants will gather more inside the filter ball shell 14 or remain inside the connecting tube 11 after passing through the filter hole, and will not pollute the safe use of the cylinder body 1. During the replacement operation, the operation is simple and convenient.

[0021] A support and protection assembly is provided to selectively protect the cylinder body 1 when the hydraulic oil pressure suddenly rises. The support and protection assembly is movably connected to the inner tube 8. The support and protection assembly includes a first sealing ring 15 and a second sealing ring 16. A main support ring 19 and a plurality of elastic support rods 18 are provided on the side of the first sealing ring 15 close to the second sealing ring 16, and a transfer protection hole 27 is provided on one side of the main joint 7 located in the pressure relief protection chamber 2. The first sealing ring 15 and the second sealing ring 16 are both inserted into the annular cavity. A plurality of elastic support rods 18 are symmetrically provided between the first sealing ring 15 and the second sealing ring 16. The plurality of elastic support rods 18 are respectively located on the inner and outer sides of the main support ring 19 and are non-contacted. A plurality of position maintaining grooves 17 are provided on the side of the connected inner tube 8 located in the annular cavity. One side of the plurality of elastic support rods 18 located on the inner side of the main support ring 19 are respectively movably inserted into the plurality of position maintaining grooves 17. One side of the main support ring 19 is non-contacted with the second sealing ring 16. The first sealing ring 15 squeezes the elastic support rod 18 and pushes the main support ring 19 to When the second sealing ring 16 contacts, the transfer protection hole 27 will not be connected with the inner cavity of the cylinder body 1. When the hydraulic oil in the cylinder body 1 is used within the normal pressure range, the hydraulic oil inside the cylinder body 1 enters the annular cavity through the connecting groove 9, and the hydraulic oil pushes the first sealing ring 15 to squeeze the main support ring 19 and contact the second sealing ring 16. At this time, under the support of the main support ring 19, the first sealing ring 15 keeps the annular cavity and the cylinder body 1 sealed. When the hydraulic oil pressure in the cylinder body 1 seriously exceeds the use range, the main support ring 19 will be broken. The pressure relief protection chamber 2 is connected to the cylinder body 1 through the transfer protection hole 27, the annular cavity and the connecting groove 9. The hydraulic oil in the cylinder body 1 enters the pressure relief protection chamber 2 from the transfer protection hole 27, and then fills the three pressure relief protection chambers 2 under the action of the separation connecting pipe 5, thereby protecting the cylinder body 1 and avoiding the problem of cylinder explosion. At the same time, during subsequent maintenance, the first sealing ring 15 and the second sealing ring 16 can be directly replaced, the hydraulic cylinder can be used normally, and the hydraulic oil in the pressure relief protection chamber 2 will not pollute the environment and can continue to be used; A breaking groove 20 may be provided in the middle of the main support ring 19 to indicate the breaking point of the main support ring 19 . When the main support ring 19 receives a large thrust, it may break at the position of the breaking groove 20 .

[0022] Embodiment 2: On the basis of embodiment 1, the connection state between the installation thread ring 10 and the main joint 7 can be kept stable, and a plurality of card grooves 21 are provided on the side of the installation thread ring 10 close to the second sealing ring 16, and a constraint block 22 is provided on the side of the second sealing ring 16 close to the card groove 21. The plurality of constraint blocks 22 are respectively inserted into the plurality of card grooves 21, and the side surfaces of the constraint blocks 22 inserted into the card groove 21 are all inclined surfaces. An annular pressure groove is provided on the side of the access handle 23 away from the second sealing ring 16, and a release ring 24 is movably provided in the annular pressure groove. A plurality of release rods 26 are symmetrically provided on one side of the release ring 24, and one side of the plurality of release rods 26 are respectively movably inserted into the plurality of card grooves 21 and in contact with the constraint block 22, and a release nut is provided on the side of the connection pipe 11 located on the release ring 24 through a threaded sleeve. 25, and one side of the releasing nut 25 is in contact with the releasing ring 24. When the installation threaded ring 10 is rotated and plugged into the main joint 7 by accessing the rotary handle 23, the slot 21 pushes the constraint block 22 and the second sealing ring 16 to squeeze the elastic support rod 18 to elastically change. The constraint block 22 is reciprocated in the slot 21. After the installation threaded ring 10 stops rotating, the installation threaded ring 10 cannot be reversed under the action of the right-angled surface of the constraint block 22, keeping the connection state between the installation threaded ring 10 and the main joint 7 stable. When it is necessary to remove the installation threaded ring 10, the releasing ring 24 and the releasing rod 26 are moved toward the position of the constraint block 22 by releasing the nut 25. The end of the releasing rod 26 is flush with the end of the installation threaded ring 10. At this time, the constraint block 22 is disengaged from the slot 21, and the main joint 7 can be reversed and disassembled normally.

[0023] While 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 these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A hydraulic cylinder with a cylinder protection structure, characterized in that: include: A cylinder body (1), wherein three pressure relief protection chambers (2) and three heat dissipation chambers (3) are symmetrically provided in the cylinder body (1), the pressure relief protection chambers (2) and the heat dissipation chambers (3) are staggered, and the centers of the three pressure relief protection chambers (2) are connected by a separating connecting pipe (5); An access component, the access component comprising two main connectors (7) and two mounting threaded rings (10), the two main connectors (7) being integrally and symmetrically arranged at the upper and lower ends of one of the pressure relief protection chambers (2) of the cylinder body (1), and the two mounting threaded rings (10) being respectively inserted into the two main connectors (7) through threads; A filter assembly, comprising a connecting inner tube (8), a connecting tube (11) and a filter ball shell (14), wherein the connecting inner tube (8) is arranged in the main joint (7), the connecting tube (11) is arranged in the mounting threaded ring (10), and the filter ball shell (14) is arranged between the connecting inner tube (8) and the connecting tube (11); A support and protection assembly is provided, wherein the support and protection assembly is movably sleeved and connected to the inner tube (8), and the support and protection assembly comprises a first sealing ring (15) and a second sealing ring (16); a main support ring (19) and a plurality of elastic support rods (18) are provided on a side of the first sealing ring (15) close to the second sealing ring (16); and a transfer protection hole (27) is provided on one side of the main joint (7) located in the pressure relief protection chamber (2).

2. The hydraulic cylinder with a cylinder protection structure according to claim 1, characterized in that: A plurality of heat dissipation fins (4) are vertically provided on both upper and lower sides of the separating connecting tube (5) in the heat dissipation cavity (3). The upper and lower ends of the heat dissipation cavity (3) are respectively open, and both ends of the cylinder body (1) cover the heat dissipation cavity (3) and are sleeved with an annular filter cotton (6).

3. The hydraulic cylinder with a cylinder protection structure according to claim 2, characterized in that: A support plate is provided on one side of the connecting inner tube (8), and the support plate is flush with the inner wall of the cylinder body (1). An annular cavity is sandwiched between the outer circumference of the connecting inner tube (8) and the inner circumference of the main joint (7), and the annular cavity is connected to the cylinder body (1) and a plurality of connecting grooves (9) are opened.

4. The hydraulic cylinder with a cylinder protection structure according to claim 3, characterized in that: An internal thread groove is provided on one side of the annular cavity of the main joint (7), and the mounting thread ring (10) is connected to the annular cavity of the main joint (7) and the inner tube (8) by threaded insertion.

5. The hydraulic cylinder with a cylinder protection structure according to claim 4, characterized in that: A combination groove is provided on the inner peripheral side of the connecting inner tube (8) away from the inner cavity of the cylinder body (1); an access handle (23) is provided on one side of the mounting threaded ring (10); the connecting tube (11) is horizontally arranged at the center of the access handle (23), and one side of the connecting tube (11) is inserted into the combination groove of the connecting inner tube (8).

6. The hydraulic cylinder with a cylinder protection structure according to claim 5, characterized in that: Ball grooves (13) are provided on one side of the combined groove and on the side of the connecting pipe (11) connected to the inner pipe (8), and the filter ball shell (14) is inserted into the two ball grooves (13).

7. The hydraulic cylinder with a cylinder protection structure according to claim 6, characterized in that: The first sealing ring (15) and the second sealing ring (16) are both inserted into the annular cavity, and a plurality of elastic support rods (18) are symmetrically arranged between the first sealing ring (15) and the second sealing ring (16). The plurality of elastic support rods (18) are respectively arranged on the inner and outer sides of the main support ring (19) in a non-contact manner.

8. The hydraulic cylinder with a cylinder protection structure according to claim 7, characterized in that: The connecting inner tube (8) is provided with a plurality of position retaining grooves (17) on one side of the annular cavity, and a plurality of elastic support rods (18) located on the inner side of the main support ring (19) are movably inserted into the plurality of position retaining grooves (17) on one side.

9. The hydraulic cylinder with a cylinder protection structure according to claim 8, characterized in that: One side of the main support ring (19) is arranged in a non-contact manner with the second sealing ring (16); when the first sealing ring (15) squeezes the elastic support rod (18) and pushes the main support ring (19) into contact with the second sealing ring (16), the transfer protection hole (27) will not communicate with the inner cavity of the cylinder body (1).

10. The hydraulic cylinder with a cylinder protection structure according to claim 9, characterized in that: The mounting threaded ring (10) is provided with a plurality of slots (21) on one side close to the second sealing ring (16), and a constraint block (22) is provided on one side close to the slot (21). The plurality of constraint blocks (22) are respectively inserted into the plurality of slots (21), and the side surfaces of the constraint blocks (22) inserted into the slots (21) are all inclined surfaces. An annular pressing groove is provided on the side of the access handle (23) away from the second sealing ring (16), and a release ring (24) is movably provided in the annular pressing groove. A plurality of release rods (26) are symmetrically provided on one side of the release ring (24), and one side of the plurality of release rods (26) is movably inserted into the plurality of slots (21) and contacts the constraint block (22). A release nut (25) is provided on one side of the connecting pipe (11) located on the release ring (24) through a threaded sleeve, and one side of the release nut (25) contacts the release ring (24).

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