Oil leakage prevention type pressure release valve for electric impact wrench

Abstract

The invention discloses an anti-oil leakage type pressure release valve for an electric impact wrench, comprising: a main body unit comprising a battery pack, the battery pack is fixedly connected with a host, the upper end of the host is fixedly connected with a head assembly, the host is provided with a switch, and the head assembly is provided with an output shaft; the operation unit comprises a pressure release valve body, a pressure release seat is arranged on the pressure release valve body, and a first cavity and a second cavity are formed in the pressure release valve body. Lubricating oil in an oil storage tank flows into a first liquid passing groove in a valve rod, enters a second liquid passing groove from the first liquid passing groove, then flows into a circular pipe from a liquid passing hole in a connecting conical block, finally flows out of a liquid outlet pipe and a vertical pipe and drips in a to-be-lubricated area, the valve rod drives a circular umbrella block to move, then a circular rod block is inserted into the liquid passing hole, and the lubricating oil is fully lubricated. The round umbrella block abuts against the connecting conical block, so that lubricating oil is not introduced into the round pipe any more, the sealing performance can be improved, and leakage of the lubricating oil is avoided.

Description

Technical Field

[0001] The invention relates to the technical field of electric impact wrenches, and in particular to an oil leakage-proof pressure relief valve for electric impact wrenches. Background Art

[0002] An electric wrench is a wrench powered by a power source or battery, and is a tool for tightening bolts. It is mainly divided into impact wrenches, shear wrenches, fixed torque wrenches, angle wrenches, angle wrenches, hydraulic wrenches, torque wrenches, and rechargeable electric wrenches.

[0003] During the operation of the impact wrench, the use of lubricating oil is crucial. It is responsible for effectively lubricating the components and controlling the working temperature to ensure the efficient operation of the tool. However, when the system pressure rises abnormally, this pressure fluctuation may directly challenge the stability of the sealing system, resulting in a decrease in sealing performance or even failure. Once the seal fails, the lubricating oil will leak uncontrollably, which not only significantly reduces work efficiency, but also increases the potential risk of pollution to the operating environment and surrounding equipment, and may even cause safety hazards, causing immeasurable damage to the environment and equipment. Summary of the invention

[0004] The purpose of this section is to summarize some aspects of embodiments of the present invention and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the specification abstract and the invention title of this application to avoid blurring the purpose of this section, the specification abstract and the invention title, and such simplifications or omissions cannot be used to limit the scope of the present invention.

[0005] Therefore, the purpose of the present invention is to provide an oil-leakage-proof pressure relief valve for an electric impact wrench, which is intended to solve the problem that "when the system pressure rises abnormally, this pressure fluctuation may directly challenge the stability of the sealing system, resulting in a decrease in sealing performance or even failure".

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0007] An oil leakage-proof pressure relief valve for an electric impact wrench, comprising:

[0008] The main unit includes a battery pack, the battery pack is fixedly connected to a main unit, the upper end of the main unit is fixedly connected to a head assembly, the main unit is provided with a switch, and the head assembly is provided with an output shaft;

[0009] The operating unit includes a pressure relief valve body, a pressure relief seat is arranged on the pressure relief valve body, a No. 1 cavity and a No. 2 cavity are provided in the pressure relief valve body, the pressure relief valve body is fixedly connected with a round tube, the pressure relief seat is fixedly connected with a valve stem, the valve stem passes through the inner wall of the No. 1 cavity and is fixedly connected with a round umbrella block, the inner wall of the No. 2 cavity is fixedly connected with a connecting cone block, a spring is sleeved on the valve stem, a plurality of No. 1 liquid passage grooves are circumferentially opened on the valve stem, a plurality of No. 2 liquid passage grooves are circumferentially opened in the round umbrella block, each of the No. 1 liquid passage grooves is connected with the corresponding No. 2 liquid passage groove, the round umbrella block is fixedly connected with the No. 2 liquid passage groove, the round umbrella block is fixedly connected with a round rod block, a liquid passage hole is opened on the connecting cone block, the liquid passage hole is connected with the round tube, a sealing ring is arranged between the pressure relief valve body and the pressure relief seat, and a mounting assembly is jointly arranged on the head assembly and the oil storage tank.

[0010] As a preferred solution of the oil leakage-proof pressure relief valve for an electric impact wrench described in the present invention, the circular tube is fixedly connected with a liquid outlet pipe, the liquid outlet pipe is fixedly connected with a vertical pipe, the head assembly is provided with an oil hole, and the lower end of the vertical pipe is arranged in the oil hole.

[0011] As a preferred solution of the oil leakage prevention pressure relief valve for an electric impact wrench described in the present invention, wherein: the mounting assembly includes a fixed block and two L-shaped plates, the fixed block is fixedly connected to the head assembly, the two L-shaped plates are arranged on the oil storage tank, the fixed block is symmetrically provided with insertion grooves, the lower end of each L-shaped plate is arranged in the insertion groove, the fixed block is symmetrically fixedly connected with the vertical plates, the fixed block is fixedly connected with the vertical blocks, each of the vertical plates is provided with a mounting circular hole, the vertical block is rotatably connected with a threaded rod, both ends of the threaded rod pass through the mounting circular holes, the front end of the threaded rod is fixedly connected with a rotating circular plate, the threaded rod is symmetrically threadedly sleeved with a movable threaded sleeve, and each of the movable threaded sleeves is arranged in the mounting circular hole.

[0012] As a preferred solution of the oil leakage prevention pressure relief valve for an electric impact wrench described in the present invention, each of the movable threaded sleeves is fixedly connected to a vertical rod, each of the vertical rods is symmetrically fixedly connected to an L-shaped plug rod, each of the L-shaped plates is symmetrically provided with insertion ports, the lower end of each of the vertical rods is fixedly connected to a slider, the fixed block is symmetrically provided with sliding grooves, and each of the sliders is slidably connected in the sliding groove.

[0013] As a preferred solution of the oil leakage-proof pressure relief valve for an electric impact wrench described in the present invention, each of the L-shaped plates is provided with a connecting port, each of the movable threaded sleeves is arranged in the connecting port, and the threaded rod passes through the two connecting ports.

[0014] As a preferred solution of the oil leakage-proof pressure relief valve for an electric impact wrench described in the present invention, wherein: the oil storage tank is fixedly connected with a threaded block, the pressure relief seat is provided with a mounting screw hole, the threaded block is provided with a liquid outlet hole, the threaded block is fixedly connected with a No. 1 connecting pipe, the right end is fixedly connected with a connecting column block, the connecting column block is fixedly connected with a No. 2 connecting pipe, the connecting column block is provided with a connecting groove, the middle is provided with a cross groove, the cross groove is connected with the connecting groove and multiple No. 1 liquid grooves, and the No. 2 connecting pipe is arranged in the No. 1 connecting pipe.

[0015] As a preferred solution of the oil leakage-proof pressure relief valve for an electric impact wrench described in the present invention, a liquid inlet pipe is fixedly connected to the side wall of the oil storage tank, the lower end of the liquid inlet pipe is connected to the interior of the oil storage tank, and a connecting cover is provided at the upper end of the liquid inlet pipe.

[0016] As a preferred solution of the oil leakage-proof pressure relief valve for an electric impact wrench described in the present invention, each of the L-shaped plates c is provided with a fixed circular hole, and a plurality of fixed threaded holes are symmetrically provided on the side wall of the oil storage tank, and each of the fixed circular hole and the fixed threaded hole is jointly provided with a fixing bolt.

[0017] Beneficial effects of the present invention:

[0018] The lubricating oil in the oil storage tank flows into the No. 1 liquid groove in the valve stem, enters the No. 2 liquid groove from the No. 1 liquid groove, and then flows into the round tube from the liquid hole on the connecting cone block, and finally flows out from the liquid outlet pipe and the vertical pipe and drips into the lubrication area. The valve stem drives the round umbrella block to move, so that the round rod block is inserted into the liquid hole, and the round umbrella block is against the connecting cone block, so that the lubricating oil no longer flows into the round tube, which can improve the sealing and avoid leakage of the lubricating oil. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative labor. Among them:

[0020] Figure 1 This is a schematic diagram of the overall structure of an oil leakage-proof pressure relief valve for an electric impact wrench proposed by the present invention;

[0021] Figure 2 This is a partial cross-sectional structural diagram of a head assembly in an oil-leakage-proof pressure relief valve for an electric impact wrench proposed by the present invention;

[0022] Figure 3This is a structural schematic diagram of an installation component in an oil-leakage-proof pressure relief valve for an electric impact wrench proposed by the present invention;

[0023] Figure 4 A schematic cross-sectional view of a pressure relief valve body in an oil-leakage-proof pressure relief valve for an electric impact wrench proposed by the present invention;

[0024] Figure 5 for Figure 4 Side view of

[0025] Figure 6 This is a schematic cross-sectional view of an oil storage tank in an oil leakage-proof pressure relief valve for an electric impact wrench proposed by the present invention;

[0026] Figure 7 The present invention provides a schematic cross-sectional structural diagram of a valve stem and a round umbrella block in an oil leakage-proof pressure relief valve for an electric impact wrench.

[0027] In the figure: 100, main unit; 101, battery pack; 102, host; 103, head assembly; 104, switch; 105, output shaft;

[0028] 200, operating unit; 201, pressure relief valve body; 202, pressure relief seat; 203, oil storage tank; 204, round pipe; 205, valve stem; 206, spring; 207, round umbrella block; 208, connecting cone block; 209, round rod block; 210, No. 1 liquid channel; 211, No. 2 liquid channel; 212, liquid hole; 213, liquid outlet pipe; 214, vertical pipe; 215, sealing ring; 216, threaded block; 217, liquid inlet Tube; 218, connecting cover; 219, installation assembly; 219a, fixed block; 219b, vertical plate; 219c, L-shaped plate; 219d, vertical block; 219e, threaded rod; 219f, rotating circular plate; 219g, movable threaded sleeve; 219h, vertical rod; 219i, L-shaped plug rod; 219j, slider; 220, fixing bolt; 221, No. 1 connecting pipe; 222, No. 2 connecting pipe; 223, cross groove. DETAILED DESCRIPTION

[0029] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0030] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0031] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments.

[0032] Secondly, the present invention is described in detail with reference to the schematic diagram. When describing the embodiments of the present invention in detail, for the sake of convenience, the cross-sectional diagrams showing the device structure will not be partially enlarged according to the general scale, and the schematic diagrams are only examples, which should not limit the scope of protection of the present invention. In addition, in actual production, the three-dimensional dimensions of length, width and depth should be included.

[0033] Reference Figure 1-7 The present invention provides an oil leakage-proof pressure relief valve for an electric impact wrench, comprising:

[0034] The main unit 100 includes a battery pack 101, the battery pack 101 is fixedly connected to a main unit 102, the upper end of the main unit 102 is fixedly connected to a head assembly 103, the main unit 102 is provided with a switch 104, and the head assembly 103 is provided with an output shaft 105;

[0035] The operating unit 200 includes a pressure relief valve body 201, on which a pressure relief seat 202 is provided, a No. 1 cavity and a No. 2 cavity are provided in the pressure relief valve body 201, a round tube 204 is fixedly connected to the pressure relief valve body 201, a valve stem 205 is fixedly connected to the pressure relief seat 202, the valve stem 205 passes through the inner wall of the No. 1 cavity and is fixedly connected to a round umbrella block 207, a connecting cone block 208 is fixedly connected to the inner wall of the No. 2 cavity, a spring 206 is sleeved on the valve stem 205, a plurality of No. 1 liquid-passing grooves 210 are circumferentially provided on the valve stem 205, a plurality of No. 2 liquid-passing grooves 211 are circumferentially provided in the round umbrella block 207, each No. 1 liquid-passing groove 210 is connected to the corresponding No. 2 liquid-passing groove 211, the round umbrella block 207 is fixedly connected to the No. 2 liquid-passing groove 211, the round umbrella block 207 is fixedly connected to the round rod block 209, and the connecting cone block A liquid hole 212 is provided on 208, and the liquid hole 212 is connected to the circular tube 204. A sealing ring 215 is arranged between the pressure relief valve body 201 and the pressure relief seat 202, and a mounting assembly 219 is jointly arranged on the head assembly 103 and the oil storage tank 203. The lubricating oil in the oil storage tank 203 flows into the No. 1 liquid groove 210 in the valve stem 205, enters the No. 2 liquid groove 211 from the No. 1 liquid groove 210, and then flows into the circular tube 204 from the liquid hole 212 on the connecting cone block 208, and finally flows out from the liquid outlet pipe 213 and the vertical pipe 214 and drips into the lubrication area. The valve stem 205 drives the round umbrella block 207 to move, so that the round rod block 209 is inserted into the liquid hole 212, and the round umbrella block 207 is against the connecting cone block 208, so that the lubricating oil no longer flows into the circular tube 204, which can improve the sealing performance and avoid the leakage of the lubricating oil.

[0036] The circular tube 204 is fixedly connected with a liquid outlet pipe 213, and the liquid outlet pipe 213 is fixedly connected with a vertical pipe 214. The head assembly 103 is provided with an oil hole, and the lower end of the vertical pipe 214 is arranged in the oil hole. Lubricating oil drips into the oil hole and falls on the area to be lubricated.

[0037] Furthermore, the mounting assembly 219 includes a fixed block 219a and two L-shaped plates 219c, the fixed block 219a is fixedly connected to the head assembly 103, the two L-shaped plates 219c are arranged on the oil storage tank 203, the fixed block 219a is symmetrically provided with insertion grooves, the lower end of each L-shaped plate 219c is arranged in the insertion groove, the fixed block 219a is symmetrically fixedly connected with the vertical plate 219b, the fixed block 219a is fixedly connected with the vertical block 219d, each vertical plate 219b is provided with a mounting circular hole, the vertical block 219d is rotatably connected with a threaded rod 219e, both ends of the threaded rod 219e pass through the mounting circular holes, the front end of the threaded rod 219e is fixedly connected with a rotating circular plate 219f, the threaded rod 219e is symmetrically threadedly sleeved with a movable threaded sleeve 219g, each movable threaded sleeve 219g is arranged in the mounting circular hole, and each movable threaded sleeve 219g is A vertical rod 219h is fixedly connected, and each vertical rod 219h is symmetrically fixedly connected with an L-shaped plug rod 219i, and each L-shaped plate 219c is symmetrically provided with an insertion port. A slider 219j is fixedly connected to the lower end of each vertical rod 219h, and a fixed block 219a is symmetrically provided with a slide groove, and each slider 219j is slidably connected in the slide groove. Each L-shaped plate 219c is provided with a connecting port, and each movable threaded sleeve 219g is arranged in the connecting port. The threaded rod 219e passes through the two connecting ports, and the rotating circular plate 219f is rotated. The rotating circular plate 219f drives the two movable threaded sleeves 219g to move oppositely through the threaded rod 219e, and then drives the L-shaped plug rod 219i to move out of the insertion port, so that the pressure relief valve body 201, the oil storage tank 203 and the L-shaped plate 219c can be removed from the fixed block 219a, so as to facilitate the maintenance of the pressure relief valve body 201.

[0038] Furthermore, the oil storage tank 203 is fixedly connected with a threaded block 216, the pressure relief seat 202 is provided with a mounting screw hole, the threaded block 216 is provided with a liquid outlet, the threaded block 216 is fixedly connected with a No. 1 connecting pipe 221, the right end of 205 is fixedly connected with a connecting column block, the connecting column block is fixedly connected with a No. 2 connecting pipe 222, the connecting column block is provided with a connecting groove, a cross groove 223 is provided in 205, the cross groove 223 is connected with the connecting groove and multiple No. 1 liquid grooves 210, the No. 2 connecting pipe 222 is arranged in the No. 1 connecting pipe 221, and when the valve stem 205 moves to the left, the No. 2 connecting pipe 222 is separated from the No. 1 connecting pipe 221, and the lubricating oil no longer flows out.

[0039] Furthermore, a liquid inlet pipe 217 is fixedly connected to the side wall of the oil storage tank 203, the lower end of the liquid inlet pipe 217 is connected to the interior of the oil storage tank 203, and a connecting cover 218 is provided at the upper end of the liquid inlet pipe 217, and the lubricating oil is added to the oil storage tank 203 through the liquid inlet pipe 217.

[0040] Furthermore, each L-shaped plate 219c is provided with a fixing circular hole, and a plurality of fixing threaded holes are symmetrically provided on the side wall of the oil storage tank 203. Each fixing circular hole and the fixing threaded hole are jointly provided with a fixing bolt 220, and the L-shaped plate 219c is installed on the oil storage tank 203 by the fixing bolt 220.

[0041] During use, the lubricating oil in the oil storage tank 203 flows into the No. 2 connecting pipe 222 through the liquid outlet hole on the threaded block 216 and the No. 1 connecting pipe 221, and then flows into the No. 1 connecting groove 210 in the valve stem 205 through the connecting groove and the cross groove 223, and then enters the No. 2 connecting groove 211 from the No. 1 connecting groove 210, and then flows into the round pipe 204 from the liquid hole 212 on the connecting cone block 208, and finally flows out from the liquid outlet pipe 213 and the vertical pipe 214 and drips into the lubrication area, and the valve stem 205 drives the round umbrella block 207 to move, so that the round rod block 20 9 is inserted into the liquid hole 212, and the round umbrella block 207 is against the connecting cone block 208, so that the lubricating oil no longer flows into the round tube 204, which can improve the sealing performance and avoid the leakage of the lubricating oil. The rotating circular plate 219f is rotated, and the rotating circular plate 219f drives the two movable threaded sleeves 219g to move in opposite directions through the threaded rod 219e, thereby driving the L-shaped plug rod 219i to move out of the insertion port, so that the pressure relief valve body 201, the oil storage tank 203 and the L-shaped plate 219c can be removed from the fixed block 219a, which is convenient for the maintenance of the pressure relief valve body 201.

[0042] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. An oil-leakage-proof pressure relief valve for an electric impact wrench, characterized in that: include: The main unit (100) comprises a battery pack (101), the battery pack (101) is fixedly connected to a main unit (102), the upper end of the main unit (102) is fixedly connected to a head assembly (103), the main unit (102) is provided with a switch (104), and the head assembly (103) is provided with an output shaft (105); The operation unit (200) comprises a pressure relief valve body (201), the pressure relief valve body (201) is provided with a pressure relief seat (202), a first cavity and a second cavity are provided in the pressure relief valve body (201), the pressure relief valve body (201) is fixedly connected with a round tube (204), the pressure relief seat (202) is fixedly connected with a valve stem (205), the valve stem (205) passes through the inner wall of the first cavity and is fixedly connected with a round umbrella block (207), the inner wall of the second cavity is fixedly connected with a connecting cone block (208), a spring (206) is sleeved on the valve stem (205), and a plurality of first liquid-passing grooves (210) are circumferentially provided on the valve stem (205), The circular umbrella block (207) is provided with a plurality of No. 2 liquid-passing grooves (211) in the circumferential direction, each of the No. 1 liquid-passing grooves (210) is connected to the corresponding No. 2 liquid-passing groove (211), the circular umbrella block (207) is fixedly connected to the No. 2 liquid-passing groove (211), the circular umbrella block (207) is fixedly connected to the round rod block (209), a liquid-passing hole (212) is provided on the connecting cone block (208), the liquid-passing hole (212) is connected to the round tube (204), a sealing ring (215) is provided between the pressure relief valve body (201) and the pressure relief seat (202), and a mounting assembly (219) is provided on the head assembly (103) and the oil storage tank (203).

2. The oil-leakage-proof pressure relief valve for an electric impact wrench according to claim 1, characterized in that: The circular tube (204) is fixedly connected to a liquid outlet pipe (213), the liquid outlet pipe (213) is fixedly connected to a vertical pipe (214), the head assembly (103) is provided with an oil hole, and the lower end of the vertical pipe (214) is arranged in the oil hole.

3. The oil-leakage-proof pressure relief valve for an electric impact wrench according to claim 1, characterized in that: The mounting assembly (219) comprises a fixing block (219a) and two L-shaped plates (219c), wherein the fixing block (219a) is fixedly connected to the head assembly (103), and the two L-shaped plates (219c) are arranged on the oil storage tank (203), and the fixing block (219a) is symmetrically provided with insertion grooves, and the lower end of each L-shaped plate (219c) is arranged in the insertion groove, and the fixing block (219a) is symmetrically fixedly connected to the vertical plate (219b), and the fixing block (219 a) is fixedly connected with a vertical block (219d), each of the vertical plates (219b) is provided with a mounting circular hole, the vertical block (219d) is rotatably connected with a threaded rod (219e), both ends of the threaded rod (219e) pass through the mounting circular hole, the front end of the threaded rod (219e) is fixedly connected with a rotating circular plate (219f), the threaded rod (219e) is symmetrically threadedly sleeved with a movable threaded sleeve (219g), and each movable threaded sleeve (219g) is arranged in the mounting circular hole.

4. The oil-leakage-proof pressure relief valve for an electric impact wrench according to claim 3, characterized in that: Each of the movable threaded sleeves (219g) is fixedly connected to a vertical rod (219h), each of the vertical rods (219h) is symmetrically fixedly connected to an L-shaped plug rod (219i), each of the L-shaped plates (219c) is symmetrically provided with insertion openings, the lower end of each of the vertical rods (219h) is fixedly connected to a slider (219j), the fixed block (219a) is symmetrically provided with sliding grooves, and each of the sliders (219j) is slidably connected in the sliding grooves.

5. The oil-leakage-proof pressure relief valve for an electric impact wrench according to claim 3, characterized in that: Each of the L-shaped plates (219c) is provided with a connection port, each of the movable threaded sleeves (219g) is arranged in the connection port, and the threaded rod (219e) passes through the two connection ports.

6. The oil-leakage-proof pressure relief valve for an electric impact wrench according to claim 1, characterized in that: The oil storage tank (203) is fixedly connected with a threaded block (216), the pressure relief seat (202) is provided with a mounting screw hole, the threaded block (216) is provided with a liquid outlet hole, the threaded block (216) is fixedly connected with a No. 1 connecting pipe (221), the right end of the (205) is fixedly connected with a connecting column block, the connecting column block is fixedly connected with a No. 2 connecting pipe (222), the connecting column block is provided with a connecting groove, the (205) is provided with a cross groove (223), the cross groove (223) is connected with the connecting groove and a plurality of No. 1 liquid grooves (210), and the No. 2 connecting pipe (222) is arranged in the No. 1 connecting pipe (221).

7. The oil-leakage-proof pressure relief valve for an electric impact wrench according to claim 6, characterized in that: A liquid inlet pipe (217) is fixedly connected to the side wall of the oil storage tank (203); the lower end of the liquid inlet pipe (217) is connected to the interior of the oil storage tank (203); and the upper end of the liquid inlet pipe (217) is provided with a connection cover (218).

8. The oil-leakage-proof pressure relief valve for an electric impact wrench according to claim 3, characterized in that: A fixing circular hole is provided on each of the L-shaped plates (219c), a plurality of fixing threaded holes are symmetrically provided on the side wall of the oil storage tank (203), and each of the fixing circular hole and the fixing threaded hole is provided with a fixing bolt (220).

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