An oil cylinder of a hydraulic jack and its assembly process

Abstract

The present invention discloses an oil cylinder of an oil hydraulic jack and its assembly process. The interface of the oil cylinder is divided into an oil cylinder contact port with a quick edge and an oil cylinder connection port with an internal thread. The nylon gasket has: an annular groove, which is arranged at the end of the nylon gasket and is used to wrap the oil cylinder contact port; a number of balls, the material of the balls is nylon, and the number of balls is arranged to roll inside the annular groove and contact the oil cylinder contact port; wherein, the diameter of the oil cylinder contact port is larger than that of the oil cylinder connection port, and the method of wrapping the oil cylinder contact port by the annular groove is natural wrapping or adhesive wrapping. The present invention ensures that no filaments or lumps flow into the interior of the oil cylinder at the contact between the oil cylinder contact port and the nylon gasket, thereby ensuring the normal use of the oil cylinder.

Description

Technical Field

[0001] The present invention relates to the technical field of the production and installation of jacks, and particularly relates to an oil cylinder of an oil jack and its assembly process. Background Art

[0002] The oil jack uses a hydraulic cylinder as a power structure. During installation, a nylon gasket is generally used to ensure the compactness and sealing of the cylinder installation. The installation method is generally to place the nylon gasket on the external installation surface and then tighten the cylinder. However, in this installation method, the contact position of the sharp edge at the bottom of the cylinder on the nylon gasket is random. When the sharp edge of the cylinder abuts against the edge position of the nylon gasket, since the contact surface between the sharp edge of the cylinder and the end of the nylon gasket is relatively narrow, it is easy to cut the end of the nylon gasket into filaments, and this filamentous object is still in the uncut assembly. This filamentous object is generally relatively thin and it is very difficult for the operator to notice. Once the cylinder is assembled, during the use of the cylinder, these filamentous objects are easily introduced into the interior of the cylinder. Especially, there is generally a speed limit valve on the cylinder, and there is a damping valve spring in the valve. After the filamentous objects enter the cylinder, they are easily entangled with the damping valve spring, resulting in the failure of the function of the speed limit valve and affecting the use of the cylinder.

[0003] Currently, there is another assembly method in the prior art. First, the nylon gasket and the cylinder are bonded together and then the cylinder is tightened. Although this method can first position the tightening position of the nylon gasket on the cylinder to ensure that the sharp edge of the cylinder does not abut against the edge position of the nylon gasket, thus avoiding the generation of filamentous objects, the glue will also form a gelatinous substance after solidification. The sharp edge of the cylinder is in direct contact with this solidified gelatinous substance. During the subsequent tightening process of the cylinder, the sharp edge of the cylinder will generate a cutting force on the gelatinous substance, resulting in the blocky substance flowing into the interior of the cylinder. Although this blocky substance will not be entangled with the damping valve spring, the blocky substance will cause blockage inside the cylinder and also affect the use of the cylinder.

[0004] In summary, aiming at the cylinder during the tightening connection, how to avoid the inflow of blocky substances or filamentous objects into the cylinder is a technical problem that urgently needs to be solved. Summary of the Invention

[0005] The purpose of the present invention is to provide an oil cylinder of an oil jack and its assembly process to solve the technical problems in the prior art.

[0006] To solve the above technical problems, the present invention provides an oil cylinder of an oil jack, and its innovation lies in: the interface of the cylinder is divided into a cylinder contact port with a sharp edge and a cylinder connection port with an internal thread. The nylon gasket has:

[0007] An annular groove, which is arranged at the end of the nylon gasket and is used to cover the cylinder contact port;

[0008] A number of ball bearings, the material of the ball bearings is nylon. The number of ball bearings is arranged to roll inside the annular groove and contact the oil cylinder contact port;

[0009] Among them, the diameter of the oil cylinder contact port is larger than that of the oil cylinder connection port. The method of covering the oil cylinder contact port by the annular groove is natural covering or adhesive covering.

[0010] Further, the above annular groove protrudes on the surface of the end of the nylon pad.

[0011] Further, the material of the above annular groove is natural rubber. The annular groove is in the shape of a cylinder. The width of the annular groove is equal to the thickness of the oil cylinder contact port. The inner wall of the annular groove has a smooth surface. The outer wall of the annular groove has a number of transverse wrinkled layers, so that the annular groove has elastic telescopic ability in the longitudinal direction.

[0012] Further, the material of the above annular groove is any one of elastic soft materials. The annular groove is in the shape of an inverted cone. The width of the top of the annular groove is larger than the thickness of the oil cylinder contact port. The width of the bottom of the annular groove is equal to the thickness of the oil cylinder contact port.

[0013] The present invention provides an assembly process for an oil jack oil cylinder, which specifically includes the following steps:

[0014] S1. First, naturally cover the annular groove of the nylon pad on the oil cylinder contact port;

[0015] S2. Align the oil cylinder connection port with the external connection position and tighten it.

[0016] The present invention provides an assembly process for an oil jack oil cylinder, which specifically includes the following steps:

[0017] A. First, place the nylon pad flat at the external connection position;

[0018] B. Insert the oil cylinder contact port into the inside of the annular groove and tighten the oil cylinder connection port and the external connection position;

[0019] C. Fill sealant inside the annular groove.

[0020] Further, the above sealant is polyurethane sealant.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] Whether the oil cylinder and the nylon pad are in a detachable state or a non-detachable state, the present invention can ensure that no filaments or lumps flow into the inside of the oil cylinder at the contact between the oil cylinder contact port and the nylon pad, thus ensuring the normal use of the oil cylinder. Description of the Drawings

[0023] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are merely exemplary, and for those of ordinary skill in the art, without creative efforts, other implementation drawings can also be obtained based on the provided drawings.

[0024] Figure 1 This is the connection structure diagram of the natural coating of the nylon pad and the oil cylinder of the present invention.

[0025] Figure 2 This is the connection structure diagram of the adhesive coating of the nylon pad and the oil cylinder of the present invention. Specific embodiments

[0026] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0027] Embodiment 1

[0028] As Figure 1 shown, this embodiment provides an oil cylinder of a hydraulic jack. The interface of the oil cylinder is divided into an oil cylinder contact port 1 with a quick edge and an oil cylinder connection port 2 with an internal thread. The purpose of this setting is to separate the quick edge and the internal thread. The nylon pad 4 has:

[0029] An annular groove 3, which is arranged at the end of the nylon pad 4 and is used to cover the oil cylinder contact port 1. The annular groove 3 protrudes on the surface of the end of the nylon pad 4. It should be noted that the protruding length of the annular groove 3 is less than the length of the oil cylinder contact port 1. After the annular groove 3 naturally covers the oil cylinder contact port 1, the nylon pad 4 and the internal thread are in a non-interfering state.

[0030] This embodiment provides an assembly process for the oil cylinder of a hydraulic jack, which specifically includes the following steps:

[0031] S1. First, naturally cover the annular groove 3 of the nylon pad 4 on the oil cylinder contact port 1. The method of naturally covering the annular groove 3 on the oil cylinder contact port 1 is as follows:

[0032] The material of the above-mentioned annular groove 3 is natural rubber. The annular groove 3 is in the shape of a cylinder. The width of the annular groove 3 is equal to the thickness of the oil cylinder contact port 1. Natural rubber itself has good elasticity. After the oil cylinder contact port 1 is inserted into the inside of the annular groove 3, the natural rubber enables the annular groove 3 to wrap more tightly around the outer wall of the oil cylinder contact port 1. And this natural wrapping makes the oil cylinder contact port 1 fit seamlessly inside the annular groove 3. Even when the oil cylinder is being tightened, if the oil cylinder contact port 1 shows wire-cutting phenomenon on the nylon gasket 4, these cut filaments will be sealed inside the annular groove 3. The inner wall of the annular groove 3 has a smooth surface. The setting of the smooth surface makes the contact between the inner wall of the annular groove 3 and the oil cylinder contact port 1 closer, ensuring that the filaments will not jump out of the inside of the annular groove 3. The outer wall of the annular groove 3 has several transverse wrinkled layers, enabling the annular groove 3 to have elastic telescopic ability in the longitudinal direction. This elastic telescopic ability makes the wrapping of the annular groove 3 around the oil cylinder contact port 1 more compact, and the phenomenon that the annular groove 3 detaches from the oil cylinder contact port 1 will not occur, thus preventing the filaments from leaking out of the inside of the annular groove 3.

[0033] S2. Align the oil cylinder connection port 2 with the external connection position. Since the diameter of the oil cylinder contact port 1 is larger than that of the oil cylinder connection port 2, the oil cylinder contact port 1 can be sleeved on the external connection position. When the oil cylinder connection port 2 and the external connection position are tightened, due to several balls 5, the material of the balls 5 is nylon, and several balls 5 are arranged to roll inside the annular groove 3 and contact the oil cylinder contact port 1. When the oil cylinder contact port 1 is gradually pressed against the nylon gasket 4, the balls 5 will roll adaptively inside the annular groove 3. This rolling can reduce the cutting pressure of the sharp edge on the oil cylinder contact port 1 on the nylon gasket 4, thereby reducing the generation of filaments, or even no filaments are generated.

[0034] In this embodiment, the annular groove 3 naturally wraps the oil cylinder contact port 1, playing a role in sealing the cut filaments. At the same time, by cooperating to reduce the cutting pressure of the sharp edge on the oil cylinder contact port 1 on the nylon gasket 4, the generation of filaments is reduced, ensuring that no filaments will flow into the inside of the oil cylinder at the contact area between the oil cylinder contact port 1 and the nylon gasket 4, ensuring the normal use of the oil cylinder.

[0035] Embodiment 2

[0036] As Figure 2 shown, this embodiment provides an oil cylinder of a hydraulic jack. The interface of the oil cylinder is divided into an oil cylinder contact port 1 with a sharp edge and an oil cylinder connection port 2 with an internal thread. The purpose of this setting is to separate the sharp edge and the internal thread. The nylon gasket 4 has:

[0037] The annular groove 3 is provided at the end of the nylon pad 4 and is used to wrap the oil cylinder contact port 1. The annular groove 3 protrudes on the surface of the end of the nylon pad 4. It should be noted that the protruding length of the annular groove 3 is less than the length of the oil cylinder contact port 1. After the annular groove 3 adhesively wraps the oil cylinder contact port 1, the nylon pad 4 and the internal thread are in a non-interfering state.

[0038] This embodiment provides an assembly process for an oil jack cylinder, which specifically includes the following steps:

[0039] A. First, place the nylon pad 4 flat at the external connection position;

[0040] B. Insert the oil cylinder contact port 1 into the inside of the annular groove 3. 1) Since the diameter of the oil cylinder contact port 1 is larger than the diameter of the oil cylinder connection port 2, the oil cylinder contact port 1 can be sleeved on the external connection position. 2) Since the annular groove 3 is in the shape of an inverted cone, the width of the top of the annular groove 3 is larger than the thickness of the oil cylinder contact port 1, and it is very easy to insert the contact port of the oil cylinder into the inside of the annular groove 3. 3) Since the material of the annular groove 3 is any one of elastic soft materials, this material enables the annular groove 3 to have a certain deformation ability. Even if the width of the bottom of the annular groove 3 is equal to the thickness of the oil cylinder contact port 1, the oil cylinder contact port 1 can be completely clamped to the bottom of the annular groove 3. At this time, there is a certain gap between the top of the annular groove 3 and the oil cylinder contact port 1. When tightening the oil cylinder connection port 2 and the external connection position:

[0041] Due to a number of balls 5, the material of the balls 5 is nylon. A number of balls 5 are rotatably arranged inside the annular groove 3 and are in contact with the oil cylinder contact port 1. When the oil cylinder contact port 1 is gradually pressed against the nylon pad 4, the balls 5 will adaptively roll inside the annular groove 3. This rolling can reduce the cutting pressure of the sharp edge on the oil cylinder contact port 1 on the nylon pad 4, thereby reducing the generation of filaments. Even no filaments are generated. And even if filaments are generated, at this time, the filaments will temporarily stay inside the annular groove 3.

[0042] C. Fill the inside of the annular groove 3 with a sealant 6. Preferably, the sealant 6 is a polyurethane sealant 6. This sealant 6 itself has excellent oil resistance and aging resistance, so as to ensure that the sealant 6 still has a long service life when contacting the oil fluid. Bond the top of the annular groove 3 and the oil cylinder contact port 1 through the sealant 6 to achieve the purpose of bonding and covering between the annular groove 3 and the oil cylinder contact port 1, so that the space between the annular groove 3 and the oil cylinder contact port 1 is sealed. Moreover, in step C, the oil cylinder contact port 1 has been tightened with the external connection position, and the oil cylinder contact port 1 will not generate a cutting force on the sealant 6, avoiding the sealant 6 being cut to produce additional lumps. At the same time, the bonding between the annular groove 3 and the oil cylinder contact port 1 is carried out from the side of the outer wall of the oil cylinder contact port 1, away from the quick-opening position at the bottom of the oil cylinder contact port 1. Therefore, the quick-opening position at the bottom of the oil cylinder contact port 1 does not come into contact with the sealant 6 either, further avoiding the sealant 6 being cut to produce lumps. During the tightening process of the oil cylinder contact port 1 and the nylon gasket 4 in step C, even if some filaments are generated, they will be sealed by the sealant 6 inside the annular groove 3.

[0043] In this embodiment, through the adaptive rolling of the ball 5, the cutting pressure of the quick-opening on the oil cylinder contact port 1 on the nylon gasket 4 is reduced, and the generation of filaments is reduced. At the same time, by bonding and covering the oil cylinder contact port 1 with the annular groove 3, it plays a role in sealing the cut filaments. Moreover, the oil cylinder contact port 1 will not generate a cutting force on the sealant 6, and the generation of lumps is also avoided, ensuring the normal use of the oil cylinder.

[0044] In summary of the above two embodiments, in Embodiment 1, the oil cylinder and the nylon gasket 4 are in a detachable state, and in Embodiment 2, the oil cylinder and the nylon gasket 4 are in a non-detachable state. However, regardless of the state between the two, it can be ensured that no filaments or lumps will flow into the interior of the oil cylinder at the contact between the oil cylinder contact port 1 and the nylon gasket 4, thus ensuring the normal use of the oil cylinder.

[0045] The above embodiments are only exemplary embodiments of the present application and are not used to limit the present application. The protection scope of the present application is defined by the claims. Those skilled in the art can make various modifications or equivalent replacements to the present application within the essence and protection scope of the present application, and such modifications or equivalent replacements should also be regarded as falling within the protection scope of the present application.

Claims

1. An oil cylinder of a hydraulic jack, characterized in that: The interface of the oil cylinder is divided into an oil cylinder contact port (1) with a quick edge and an oil cylinder connection port (2) with an internal thread. The nylon gasket (4) has: An annular groove (3) provided at the end of the nylon gasket (4) for covering the oil cylinder contact port (1); A number of balls (5) made of nylon. A number of the balls (5) are arranged to roll inside the annular groove (3) and contact the oil cylinder contact port (1); Among them, the diameter of the oil cylinder contact port (1) is larger than that of the oil cylinder connection port (2). The covering method of the annular groove (3) for the oil cylinder contact port (1) is natural covering or adhesive covering; In the natural covering, the material of the annular groove (3) is natural rubber. The annular groove (3) is in a cylindrical shape, and the width of the annular groove (3) is equal to the thickness of the oil cylinder contact port (1); In the adhesive covering, the inside of the annular groove (3) is filled with a sealant (6), and the annular groove (3) and the oil cylinder contact port (1) are adhesively connected through the sealant (6).

2. The cylinder of a hydraulic jack according to claim 1, wherein: The annular groove (3) protrudes on the surface of the end of the nylon gasket (4).

3. The cylinder of an oil jack according to claim 2, characterized in that: The inner wall of the annular groove (3) has a smooth surface, and the outer wall of the annular groove (3) has a number of transverse wrinkled layers, so that the annular groove (3) has elastic telescopic ability in the longitudinal direction.

4. The cylinder of a hydraulic jack according to claim 2, characterized in that: The material of the annular groove (3) is any one of elastic soft materials. The annular groove (3) is in an inverted cone shape. The width of the top of the annular groove (3) is larger than the thickness of the oil cylinder contact port (1), and the width of the bottom of the annular groove (3) is equal to the thickness of the oil cylinder contact port (1).

5. An assembly process of an oil cylinder according to any one of claims 1-3, characterized in that: Specifically, it includes the following steps: S1. First, naturally cover the annular groove (3) of the nylon gasket (4) on the oil cylinder contact port (1); S2. Align the oil cylinder connection port (2) with the external connection position and tighten it.

6. An assembly process for an oil cylinder according to any one of claims 1, 2, and 4, characterized in that: Specifically, it includes the following steps: A. First, place the nylon gasket (4) flat at the external connection position; B. Insert the oil cylinder contact port (1) into the inside of the annular groove (3) and tighten the oil cylinder connection port (2) with the external connection position; C. Fill the inside of the annular groove (3) with the sealant (6).

7. The assembly process of an oil cylinder according to claim 6, characterized in that: The sealant (6) is a polyurethane sealant (6).

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