Pneumatic wrench switch assembly

Abstract

The utility model relates to a pneumatic wrench switch assembly which comprises a cylindrical shell, the interior of the shell is hollow, an air inlet, a first air outlet and a second air outlet which are communicated with the interior are formed in the periphery of the shell, the air inlet, the first air outlet and the second air outlet are located on the two sides of the shell at intervals, and the first air outlet is adjacent to the second air outlet; a plurality of gear grooves are formed in the end face of the shell in a sunken mode and are arranged at intervals in the circumferential direction of the shell. The reversing inner core is provided with a stop block in a protruding manner; and the operating piece is fixedly arranged on the reversing inner core, a gear flange is arranged on the operating piece in a protruding mode, the gear flange is located in one gear groove, the operating piece can drive the reversing inner core to rotate, the first air outlet or the second air outlet is sealed through the stop block, and the gear flange rotates into the other gear groove. The pneumatic wrench switch assembly is provided with the gear matching structure which is matched in a rotating mode, the gear flange is rotated to be matched with different gear grooves, and rapid and accurate air path switching is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of pneumatic wrenches, in particular to a pneumatic wrench switch component. Background Art

[0002] Pneumatic wrenches are widely used in many industries, such as automobile and motorcycle assembly and maintenance. They use compressed air to generate rotational power. When the pneumatic wrench is in use, the direction of rotational drive includes clockwise drive and counterclockwise drive, which correspond to tightening and loosening of screws respectively. When switching the direction of rotational drive, the current pneumatic wrench sets two vents on the inner core to rotate and connect different air paths. This structure cannot quickly and accurately rotate the inner core to the corresponding connection position during operation, which will cause the power of the rotational drive to be unstable. Utility Model Content

[0003] Based on this, it is necessary to provide a pneumatic wrench switch assembly with a rotating gear matching structure to address the problem that the inner core cannot be quickly and accurately rotated to the corresponding connection position when the current pneumatic wrench switch assembly switches the air circuit to achieve forward and reverse rotation. The pneumatic wrench switch assembly can achieve fast and accurate air circuit switching by rotating the gear flange and cooperating with different gear slots.

[0004] A pneumatic wrench switch assembly, comprising:

[0005] A cylindrical shell is hollow inside, an air inlet, a first air outlet and a second air outlet are arranged on the outer circumference of the shell and are connected to the inside, the air inlet and the first air outlet and the second air outlet are spaced apart and located on both sides of the shell, the first air outlet is adjacent to the second air outlet, and a plurality of gear slots are recessed on the end surface of the shell, and the plurality of gear slots are spaced apart along the circumference of the shell;

[0006] The reversing inner core is protruding with a stopper; and

[0007] An operating member is fixed on the reversing inner core, and a gear flange is protruding from the operating member. The gear flange is located in one of the gear slots. The operating member can drive the reversing inner core to rotate, so that the blocking block seals the first air outlet or the second air outlet, and the gear flange rotates to the other gear slot.

[0008] In the pneumatic wrench switch assembly, in the first state, the gear flange abuts against a gear slot, the blocking block seals the second air outlet, and the air inlet is connected to the first air outlet through the spacing between the reversing inner core and the shell; when it is necessary to switch to the second state, the rotating operating member rotates the gear flange to abut against another gear slot, and the blocking block just seals the first air outlet, and the air inlet is connected to the second air outlet through the spacing between the reversing inner core and the shell. By rotating the gear flange to cooperate with different gear slots, rapid and accurate air path switching can be achieved.

[0009] In one embodiment, the shift groove is a conical groove, and the shift flange is a conical column, so that the shift flange and the shift groove can be more stably abutted and positioned.

[0010] In one embodiment, four gear slots are provided and are equally spaced along the circumference of the housing.

[0011] In one of the embodiments, the operating member includes an annular main body, the main body is fixedly sleeved on the end of the reversing inner core, and the gear flange is provided on a side of the main body close to the shell.

[0012] In one of the embodiments, a fixing screw is further included. A threaded hole is radially penetrated from the outer side of the main body inward, and a positioning hole corresponding to the threaded hole is recessed on the outer side of the reversing inner core. The fixing screw is threadedly connected to the threaded hole and extends into the positioning hole.

[0013] In one embodiment, the operating member further comprises a hand-held portion provided on the main body, one end of the hand-held portion is fixedly connected to the main body, and the other end extends along the length direction of the shell. The hand-held portion is provided to facilitate the user to rotate the main body and drive the gear flange to rotate and switch gears.

[0014] In one embodiment, the hand-held portion and the gear flange are located on the same vertical axis, and the gear position of the gear flange can be directly determined by observing the position of the hand-held portion.

[0015] In one embodiment, a gear spring is also included. A mounting hole is recessed on one side of the main body close to the shell. The aperture of the mounting hole close to the shell is smaller than the aperture of other positions. The gear flange includes a columnar base and a conical end provided on one end of the base. The end surface of the other end of the base extends inwardly to provide a sleeve hole. The base is inserted into the mounting hole, and the conical end is exposed from the mounting hole. One end of the gear spring is inserted into the sleeve hole, and the other end abuts against the bottom of the mounting hole. When the main body rotates, the conical end is pressed by the end surface of the shell, the gear spring is compressed, and the base moves into the mounting hole. When the main body rotates to a specific gear, the base moves out of the mounting hole under the elastic restoring force of the gear spring. The conical end abuts and positions with the gear slot, which can realize the elastic positioning of the gear flange and the gear slot, and the gas path switching is smoother.

[0016] In one embodiment, the commutating inner core comprises a cylindrical main core body, and one end of the main core body extends toward the periphery to form the blocking block.

[0017] In one embodiment, one end of the main core body extends toward the periphery to form a cylindrical initial portion, the initial portion is partially cut along the circumferential direction, and the lateral space of the cutting is that the initial portion extends from one end surface of the main core body to the other end, and a part of the other end of the initial portion is retained, and the blocking block is formed after the initial portion is cut. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a structural schematic diagram of an embodiment of a pneumatic wrench switch assembly of the utility model;

[0019] Figure 2 This is a cross-sectional structural diagram of a pneumatic wrench switch assembly of the utility model;

[0020] Figure 3 This is a schematic diagram of the exploded structure of a pneumatic wrench switch assembly of the utility model;

[0021] Figure 4 It is a structural schematic diagram of an embodiment of the commutation inner core of the utility model.

[0022] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0023] 100. Pneumatic wrench switch assembly; 1. Shell; 11. Air inlet; 12. First air outlet; 13. Second air outlet; 14. Shift slot; 2. Reversing inner core; 21. Positioning hole; 22. Main core body; 221. Second return hole; 23. Initial part; 3. Operating member; 31. Main body; 311. Threaded hole; 32. Hand-held part; 4. Stop block; 41. First return hole; 5. Shift flange; 51. Base; 52. Conical end; 6. Fixing screw; 7. Shift spring. DETAILED DESCRIPTION

[0024] In order to make the above-mentioned purposes, features and advantages of the utility model more obvious and easy to understand, the specific implementation methods of the utility model are described clearly and completely below in conjunction with the accompanying drawings. Obviously, the specific details described below are only part of the embodiments of the utility model, and the utility model can also be implemented in many other embodiments different from those described here. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work belong to the protection scope of the utility model.

[0025] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation method.

[0026] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0027] See also Figures 1 to 3 In one embodiment, a pneumatic wrench switch assembly 100 includes: a cylindrical shell 1, a reversing inner core 2 and an operating member 3. The shell 1 is hollow inside, and an air inlet 11, a first air outlet 12 and a second air outlet 13 communicating with the inside are arranged on the outer circumference of the shell 1. The air inlet 11 and the first air outlet 12 and the second air outlet 13 are spaced apart and located at the upper and lower sides of the shell 1, and the first air outlet 12 is adjacent to the second air outlet 13. A plurality of gear slots 14 are recessed on the end surface of the shell 1, and the plurality of gear slots 14 are spaced apart along the circumference of the shell 1. A blocking block 4 is protruding from the reversing inner core 2. The operating member 3 is fixedly arranged on the reversing inner core 2, and a gear flange 5 is protruding from the operating member 3, and the gear flange 5 is located in one of the gear slots 14. The operating member 3 can drive the reversing inner core 2 to rotate, so that the blocking block 4 seals the first air outlet 12 or the second air outlet 13, and the gear flange 5 rotates to the other gear slot 14.

[0028] In the pneumatic wrench switch assembly 100, in the first state, the gear flange 5 abuts against a gear slot 14, and the blocking block 4 seals the second air outlet 13. At this time, the air inlet 11 is connected to the first air outlet 12 through the interval between the reversing inner core 2 and the housing 1; when it is necessary to switch to the second state, the rotating operating member 3 rotates the gear flange 5 to abut against another gear slot 14. At this time, the blocking block 4 just seals the first air outlet 12, and the air inlet 11 is connected to the second air outlet 13 through the interval between the reversing inner core 2 and the housing 1. By rotating the gear flange 5 to cooperate with different gear slots 14, rapid and accurate air path switching can be achieved.

[0029] In one embodiment, the shift groove 14 is a conical groove, and the shift flange 5 is a conical column, which can facilitate more stable abutment and positioning of the shift flange 5 and the shift groove 14. Four shift grooves 14 can be provided and spaced equally along the circumference of the housing 1.

[0030] See also Figure 1 and Figure 3 In one embodiment of the operating member 3 , the operating member 3 includes an annular main body 31 , the main body 31 is fixedly sleeved on the end of the reversing inner core 2 , and a gear flange 5 is provided on one side of the main body 31 close to the housing 1 .

[0031] Furthermore, the pneumatic wrench switch assembly 100 of the utility model also includes a fixing screw 6, a threaded hole 311 is radially penetrated from the outer side of the main body 31 to the inner side, and a positioning hole 21 corresponding to the threaded hole 311 is recessed inward from the outer side of the reversing inner core 2. The fixing screw 6 is threadedly connected to the threaded hole 311 and extends into the positioning hole 21, so that the main body 31 can be quickly and stably locked to the end of the reversing inner core 2.

[0032] In another embodiment, the operating member 3 further includes a hand-held portion 32 disposed on the main body 31, one end of the hand-held portion 32 is fixedly connected to the main body 31, and the other end extends along the length direction of the housing 1. The hand-held portion 32 is provided to facilitate the user to rotate the main body 31 and drive the gear flange 5 to rotate and switch the gear. In order to facilitate the user's operation, the hand-held portion 32 can extend in the direction of the housing 1.

[0033] In one embodiment of the hand-held portion 32 , the hand-held portion 32 and the gear flange 5 are located on the same vertical axis, and the gear position of the gear flange 5 can be directly determined by observing the position of the hand-held portion 32 .

[0034] See also Figure 3In one embodiment, the pneumatic wrench switch assembly 100 of the utility model further includes a shift spring 7. A mounting hole is recessed on one side of the main body 31 close to the housing 1, and the aperture of the mounting hole close to the housing 1 is smaller than the aperture of other positions. The shift flange 5 includes a columnar base 51 and a tapered end 52 provided on one end of the base 51, and the end surface of the other end of the base 51 extends inwardly to provide a sleeve hole, the base 51 is inserted into the mounting hole, and the tapered end 52 is exposed from the mounting hole, and the diameter of the base 51 is larger than the aperture of the mounting hole close to the housing 1. One end of the shift spring 7 is inserted into the sleeve hole, and the other end abuts against the bottom of the mounting hole. When the main body 31 rotates, the conical end head 52 is pressed by the end face of the shell 1, the gear spring 7 is compressed, and the base 51 moves into the mounting hole. When it rotates to a specific gear, under the action of the elastic restoring force of the gear spring 7, the base 51 moves out of the mounting hole, and the conical end head 52 is abutted and positioned against the gear groove 14, which can realize the elastic positioning of the gear flange 5 and the gear groove 14, and the gas path switching is smoother.

[0035] See also Figure 3 and Figure 4 In the embodiment of the blocking block 4 , the commutating inner core 2 includes a cylindrical main core body 22 , and one end of the main core body 22 extends toward the periphery to form the blocking block 4 .

[0036] Further, one end of the main core 22 extends outward to form a cylindrical initial portion 23, the initial portion 23 is partially cut along the circumferential direction, and the cut lateral space is the initial portion 23 extending from one end of the main core 22 to the other end, and a part of the other end of the initial portion 23 is retained, and the initial portion 23 is cut to form a blocking block 4. The gas can enter from the air inlet 11, and flow to the first air outlet 12 or the second air outlet 13 through the gap between the cut part of the initial portion 23 and the inner wall of the housing 1, and the gas finally flows out from the first air outlet 12 or the second air outlet 13.

[0037] It is understandable that in order to ensure the stability of the gas pressure, a gas circuit can be set. Specifically, the blocking block 4 and the main core body 22 are hollow and connected inside, and a first return hole 41 connected to the inside is provided on the outside of the blocking block 4, and a second return hole 221 connected to the inside is provided on the other side of the main core body 22 opposite to the first return hole 41. When the blocking block 4 rotates to the second gas outlet 13, the air inlet path is the air inlet 11, the gap between the cut part of the initial part 23 and the inner wall of the shell 1, and the first gas outlet 12, and the return air path is the second gas outlet 13, the first return hole 41, the inner cavity of the blocking block 4, the inner cavity of the main core body 22, the second return hole 221, and the air inlet 11.

[0038] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0039] The above-mentioned embodiments only express several implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several deformations, substitutions and improvements can be made without departing from the concept of the utility model, which should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model patent should be based on the claims.

Claims

1. A pneumatic wrench switch assembly, characterized in that: include: A cylindrical shell is hollow inside, an air inlet, a first air outlet and a second air outlet are arranged on the outer circumference of the shell and are connected to the inside, the air inlet and the first air outlet and the second air outlet are spaced apart and located on both sides of the shell, the first air outlet is adjacent to the second air outlet, and a plurality of gear slots are recessed on the end surface of the shell, and the plurality of gear slots are spaced apart along the circumference of the shell; The reversing inner core is protruding with a stopper; and An operating member is fixed on the reversing inner core, and a gear flange is protruding from the operating member. The gear flange is located in one of the gear slots. The operating member can drive the reversing inner core to rotate, so that the blocking block seals the first air outlet or the second air outlet, and the gear flange rotates to the other gear slot.

2. The pneumatic wrench switch assembly according to claim 1, characterized in that: The gear position groove is a conical groove, and the gear position flange is a conical column.

3. The pneumatic wrench switch assembly according to claim 1, characterized in that: There are four gear slots, which are equally spaced along the circumference of the housing.

4. The pneumatic wrench switch assembly according to claim 1, characterized in that: The operating member comprises an annular main body, the main body is fixedly sleeved on the end of the reversing inner core, and the gear flange is arranged on one side of the main body close to the shell.

5. The pneumatic wrench switch assembly according to claim 4, characterized in that: It also includes a fixing screw. A threaded hole is radially penetrated from the outer side of the main body inward. A positioning hole corresponding to the threaded hole is recessed on the outer side of the reversing inner core. The fixing screw is threadedly connected to the threaded hole and extends into the positioning hole.

6. The pneumatic wrench switch assembly according to claim 4, characterized in that: The operating member further comprises a hand-held portion arranged on the main body, one end of the hand-held portion is fixedly connected to the main body, and the other end of the hand-held portion extends along the length direction of the shell.

7. The pneumatic wrench switch assembly according to claim 6, characterized in that: The hand-held portion and the gear flange are located on the same vertical axis.

8. The pneumatic wrench switch assembly according to claim 4, characterized in that: It also includes a gear spring, a mounting hole is recessed on one side of the main body close to the shell, the aperture of the mounting hole at one end close to the shell is smaller than the aperture at other positions, the gear flange includes a columnar base and a conical end head arranged on one end of the base, the end surface of the other end of the base extends inwardly to provide a socket hole, the base is inserted into the mounting hole, and the conical end head is exposed from the mounting hole, one end of the gear spring is inserted into the socket hole, and the other end abuts against the bottom of the mounting hole.

9. The pneumatic wrench switch assembly according to claim 1, characterized in that: The reversing inner core comprises a cylindrical main core body, one end of which extends toward the outer circumference to form the blocking block.

10. The pneumatic wrench switch assembly according to claim 9, characterized in that: One end of the main core body extends outward to form a cylindrical initial part, and the initial part is partially cut along the circumferential direction, and the cut lateral space is that the initial part extends from one end surface close to the main core body to the other end, and a part of the other end of the initial part is retained, and the blocking block is formed after the initial part is cut.

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