Wrench for automobile repair

Abstract

The invention discloses an automobile repair wrench. The automobile repair wrench comprises a first mounting part and a second mounting part, a first bevel gear and a second bevel gear are arranged in the first mounting part; a driving shaft is arranged in the second mounting part, a third bevel gear is arranged on the driving shaft, and the third bevel gear is meshed with the first bevel gear and the second bevel gear; an output shaft is further arranged in the first mounting part; the output shaft comprises a cylinder body and a cam shaft arranged in the cylinder body, a first key groove and a second key groove are formed in the cylinder body, and flat keys are arranged in the first key groove and the second key groove; the cam shaft is rotated, so that a first cam on the cam shaft enables a flat key in a first key groove to be connected with a first bevel gear, the output shaft is driven to rotate anticlockwise, and disassembling of a bolt is achieved. And a second cam on the cam shaft is used for promoting a flat key in a second key groove to be connected with a second bevel gear, so that the output shaft is driven to rotate clockwise, and the bolt is tightened.

Description

Technical Field

[0001] The invention relates to the technical field of auto repair tools, in particular to an auto repair wrench. Background Art

[0002] Traditional box spanners can be used to loosen or tighten screws and nuts, but such spanners require a larger space for rotation. Otherwise, in a narrow space, the spanner needs to be rotated to a certain angle before being removed and re-inserted, which is quite troublesome to use. In view of the above shortcomings, the art has developed a ratchet spanner, which adds a ratchet mechanism to the spanner body, allowing the user to loosen or tighten the nut in a narrow range by swinging back and forth at a small angle without having to remove the ratchet spanner and re-insert it. For example, the ratchet spanners disclosed in Chinese patents CN208977685U, CN106392967B, CN208304886U, and CN208068129U belong to this category.

[0003] However, the above-mentioned structure of the ratchet wrench has become a cliché in the industry, and few people continue to study and improve the structure of the ratchet wrench, resulting in no innovative and unique structure of the ratchet wrench in recent years. Therefore, it is necessary to provide a novel and progressive wrench to solve the above-mentioned problems. Summary of the invention

[0004] The purpose of the present invention is to provide a car repair wrench to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: an auto repair wrench, comprising a first mounting portion and a second mounting portion; a first bevel tooth and a second bevel tooth are arranged inside the first mounting portion, and an output shaft is also arranged inside the first mounting portion; a drive shaft and a third bevel tooth arranged on the drive shaft are arranged inside the second mounting portion; the third bevel tooth is meshed between the first bevel tooth and the second bevel tooth; the output shaft comprises a cylinder, a connecting member movably mounted on the cylinder, and a camshaft arranged inside the cylinder; a first keyway and a second keyway are arranged on the cylinder, and the first keyway and the second keyway are both used to guide the flat key arranged therein to slide; the camshaft is rotated so that the first cam on the camshaft causes the flat key in the first keyway to be connected to the first bevel tooth, so as to drive the output shaft to rotate counterclockwise; the second cam on the camshaft causes the flat key in the second keyway to be connected to the second bevel tooth, so as to drive the output shaft to rotate clockwise.

[0006] As a preferred technical solution of the present invention: a cover plate is provided on the first mounting portion, and is connected to the first mounting portion via the cover plate, so that the facing surfaces of the first bevel tooth and the second bevel tooth are meshed with the third bevel tooth.

[0007] As a preferred technical solution of the present invention: two ends of the camshaft are further provided with hexagonal holes.

[0008] As a preferred technical solution of the present invention: the connecting member includes a first polygonal column and a connecting plate, and is connected to the cylinder through a fastener passing through the connecting plate, so that the connecting member can be movably installed on the cylinder.

[0009] As a preferred technical solution of the present invention: the number of the connecting members is two, and the two connecting members are both located outside the first mounting portion.

[0010] As a preferred technical solution of the present invention: both ends of the camshaft extend into the connecting member and are connected to the annular groove in the connecting member through a provided snap ring to restrict the camshaft within the output shaft.

[0011] As a preferred technical solution of the present invention: guide grooves are provided on both the first cam and the second cam, and the flat key is connected to the guide grooves via a sliding block.

[0012] As a preferred technical solution of the present invention: a second polygonal column is further provided at one end of the driving shaft away from the third bevel tooth.

[0013] As a preferred technical solution of the present invention: a connecting hole is further provided at one end of the second mounting portion away from the first mounting portion, and the second polygonal column is located in the connecting hole.

[0014] As a preferred technical solution of the present invention: the slider is a sphere, and the slider is a magnet.

[0015] By adopting the above technical scheme, the beneficial effects of the present invention are: 1. By rotating the camshaft, the first cam on the camshaft prompts the flat key in the first keyway to connect with the first bevel tooth, and at this time the drive shaft rotates clockwise to drive the output shaft to rotate counterclockwise, thereby realizing the disassembly of the bolt; similarly, the second cam on the camshaft is used to prompt the flat key in the second keyway to connect with the second bevel tooth, and the clockwise rotation of the drive shaft is used to drive the output shaft to rotate clockwise, thereby realizing the tightening of the bolt; based on this, when the power source rotates unidirectionally, the rotation direction of the output shaft can be adjusted by the rotation of the camshaft.

[0016] 2. Compared with the existing wrenches, the wrench can realize 90-degree power transmission, allowing workers to conveniently perform bolt tightening operations in a small space, making up for the previous deficiencies, improving work efficiency, saving manpower, and achieving the purpose of convenience and speed; secondly, the drive shaft is used to input external power to the output shaft, and then the output shaft is connected to the socket wrench to achieve reliable power output; at the same time, when the external power is input through the output shaft, it can also drive the drive shaft to rotate, and then when the drive shaft is connected to the socket wrench, the socket wrench can be driven to rotate through the drive shaft; thirdly, due to the rotation of the camshaft, the cam can drive the corresponding flat key to move up and down alternately, so as to adjust the direction of the output shaft. Based on this, the wrench is not only easy to use but also novel in structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the main structure of the present invention;

[0018] Figure 2 It is an exploded schematic diagram of the main structure of the present invention;

[0019] Figure 3 It is a cross-sectional schematic diagram of the main structure of the present invention;

[0020] Figure 4 It is a schematic diagram of the exploded structure of the output shaft of the present invention;

[0021] Figure 5 It is a schematic diagram of the cross-sectional structure of the output shaft of the present invention;

[0022] Figure 6 It is a schematic diagram of the main structure of the camshaft of the present invention;

[0023] Figure 7 It is a schematic diagram of the main structure of the flat key of the present invention;

[0024] Figure 8 It is a schematic diagram of the cross-sectional structure of the connecting piece of the present invention.

[0025] In the figure: 1, first mounting portion; 2, driving shaft; 3, output shaft; 30, cylinder; 31, flat key; 32, first keyway; 33, camshaft; 34, connecting piece; 35, snap ring; 36, second cam; 37, guide groove; 38, hexagonal hole; 39, first cam; 310, second keyway; 311, first polygonal column; 312, ring groove; 313, connecting plate; 314, slider; 4, cover plate; 5, second mounting portion; 6, first bevel tooth; 7, third bevel tooth; 8, second bevel tooth; 9, second polygonal column; 10, connecting hole. DETAILED DESCRIPTION

[0026] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limitations on the present invention. In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "upper surface", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the present invention.

[0027] See also Figure 1-8 , an embodiment of the present invention: a car repair wrench, comprising a first mounting portion 1 and a second mounting portion 5; the first mounting portion 1 is provided with a first bevel gear 6 and a second bevel gear 8, and the first mounting portion 1 is also provided with an output shaft 3; the second mounting portion 5 is provided with a drive shaft 2 and a third bevel gear 7 arranged on the drive shaft 2; the third bevel gear 7 is meshed between the first bevel gear 6 and the second bevel gear 8; the output shaft 3 comprises a barrel 30, a connecting member 34 movably mounted on the barrel 30, and a cam shaft 33 arranged inside the barrel 30; the The cylinder body 30 is provided with a first keyway 32 and a second keyway 310, and the first keyway 32 and the second keyway 310 are both used to guide the flat key 31 provided therein to slide therein; by rotating the camshaft 33, the first cam 39 on the camshaft 33 causes the flat key 31 in the first keyway 32 to be connected to the first bevel tooth 6, so as to drive the output shaft 3 to rotate counterclockwise; the second cam 36 provided on the camshaft 33 causes the flat key 31 in the second keyway 310 to be connected to the second bevel tooth 8, so as to drive the output shaft 3 to rotate clockwise.

[0028] Specifically, by rotating the camshaft 33, the first cam 39 on the camshaft 33 causes the flat key 31 in the first keyway 32 to connect with the keyway in the first bevel tooth 6. At this time, the drive shaft 2 rotates clockwise to drive the output shaft 3 to rotate counterclockwise, thereby realizing the disassembly of the bolt; similarly, the second cam 36 on the camshaft 33 causes the flat key 31 in the second keyway 310 to connect with the keyway in the second bevel tooth 8. The drive shaft 2 rotates clockwise to drive the output shaft 3 to rotate clockwise, thereby realizing the tightening of the bolt;

[0029] Based on this, the rotation direction of the output shaft 3 can be adjusted by rotating the camshaft 33, thereby reducing the device's requirements on the rotation direction of the drive shaft 2, that is, the drive shaft 2 only needs to rotate in one direction to drive the output shaft 3 to rotate clockwise or counterclockwise.

[0030] In addition, compared with the existing wrenches, the wrench can realize 90-degree power transmission, so that the staff can conveniently perform bolt tightening operations in a small space, which makes up for the previous shortcomings, improves work efficiency, saves manpower, and achieves the purpose of convenience and speed; secondly, the external power is input to the output shaft 3 by using the drive shaft 2, and then the output shaft 3 is connected to the socket wrench to realize reliable power output; at the same time, when the external power is input through the output shaft 3, the drive shaft 2 can also be driven to rotate, and then when the drive shaft 2 is connected to the socket wrench, the socket wrench can be driven to rotate through the drive shaft 2; based on this, the present invention realizes multi-directional power input while having a novel structure, especially, the drive shaft 2 can keep rotating in the same direction, and the output shaft 3 can realize forward and reverse rotation, that is, clockwise rotation and counterclockwise rotation, so that the adaptability of the device is stronger.

[0031] Furthermore, since the first mounting portion 1 is provided with a cover plate 4, the cover plate 4 is connected to the first mounting portion 1, so that the facing surfaces of the first bevel gear 6 and the second bevel gear 8 are meshed with the third bevel gear 7. Therefore, the first bevel gear 6 and the second bevel gear 8 can be reliably meshed with the third bevel gear 7 to enhance the reliable transmission of power between the three bevel gears. In addition, the cover plate 4 is movably connected to the first mounting portion 1, which also facilitates the disassembly and assembly of the three bevel gears and the output shaft 3.

[0032] Furthermore, since the two ends of the camshaft 33 are provided with hexagonal holes 38, a hexagonal wrench can be inserted into the hexagonal hole 38 to drive the camshaft 33 to rotate. In particular, the hexagonal holes 38 are provided at both ends of the camshaft 33, so that the rotation direction of the output shaft 3 is adjusted simply and conveniently, and the rotation direction of the output shaft 3 can be adjusted even during the process of disassembling and assembling the bolts.

[0033] Furthermore, since the connecting member 34 includes a first polygonal column 311 and a connecting plate 313, the connecting member 34 is connected to the cylinder 30 through a fastener passing through the connecting plate 313 so that the connecting member 34 can be movably installed on the cylinder 30. Therefore, it is convenient for the installation of the camshaft 33 and the cylinder 30; and it is convenient for the first polygonal column 311 to be inserted into the socket wrench.

[0034] Furthermore, there are two connecting members 34, and both connecting members 34 are located outside the first mounting portion 1, so that both ends of the output shaft 3 can be connected to the socket wrench; in particular, when one of the connecting members 34 comes into contact with the bolt, the user can also use the wrench to clamp on one of the connecting members 34 and cooperate with the drive shaft 2 to cause the output shaft 3 to rotate.

[0035] Based on this, the device can use the connecting piece 34 that does not contact the bolt as an auxiliary power input end. Therefore, compared with the existing equipment, the device has more input ends and is more convenient to use. In addition, the device has more advantages for bolts that are difficult to disassemble.

[0036] In order to enhance the two cams on the camshaft 33 to reliably promote the flat key 31 to slide up and down, the two ends of the camshaft 33 extend into the connecting piece 34 and are connected to the annular groove 312 in the connecting piece 34 through a provided snap ring 35 to restrict the camshaft 33 within the output shaft 3. After the snap ring 35 is installed, it can overcome the sliding of the camshaft 33 along the central axis of the cylinder 30, thereby preventing the flat key 31 from falling off from the keyway due to the sliding of the camshaft 33 and preventing the flat key 31 from having poor contact with the first bevel tooth 6 and the second bevel tooth 8.

[0037] On the basis of the above scheme, since the first cam 39 and the second cam 36 are both provided with a guide groove 37, and the flat key 31 is connected to the guide groove 37 through the provided slider 314, the reliability of the flat key 31 when sliding can be improved, thereby allowing the flat key 31 to smoothly dock or separate with the first bevel tooth 6 or the second bevel tooth 8.

[0038] Furthermore, the slider 314 is a sphere, and the slider 314 is a magnet, so when the cam rotates, the slider 314 is adsorbed on the cam, improving the linkage efficiency between the slider 314 and the cam, so that the slider 314 and the cam keep in step, and can also prevent the flat key 31 from slipping out of the keyway. Based on this, the linkage efficiency between the camshaft 33 and the flat key 31 is optimized to ensure that the camshaft 33 reliably promotes the contact and separation of the flat key 31 with the first bevel tooth 6 and the second bevel tooth 8.

[0039] Furthermore, since a second polygonal column 9 is provided at the end of the drive shaft 2 away from the third bevel tooth 7, it is convenient to insert a socket wrench into the drive shaft 2, and it can also avoid the drive shaft 2 slipping when power is input; wherein, the first polygonal column 311 and the second polygonal column 9 are consistent with the polygonal column structure of the existing wrench.

[0040] Furthermore, since the second mounting portion 5 is further provided with a connecting hole 10 at one end away from the first mounting portion 1, and the second polygonal prism 9 is located in the connecting hole 10, when the external driving portion is sleeved on the second polygonal prism 9, the connecting hole 10 can be used to cover the driving portion of the driving member from the outside to avoid shaking of the driving portion; in addition, when not in use, a dust cover can be plugged into the connecting hole 10 to prevent dust from entering the interior of the device.

[0041] When the inner wall of the connecting hole 10 has threads, a round tube can be used to connect thereto, thereby extending the length of the second mounting portion 5. At this time, the lengthened second mounting portion 5 can be used to protect the connecting shaft connected to the drive shaft 2. For example, when disassembling or installing bolts on the side of the engine under the vehicle, the connecting shaft is sleeved on the drive shaft 2 and the other end is connected to an electric tool. At this time, the second mounting portion 5 can be extended to the bottom of the vehicle. However, a long-distance connecting shaft is prone to shaking if it is suspended in the air. At this time, the connecting shaft is sleeved in the round tube by threading the connecting hole 10. This can not only avoid shaking of the connecting shaft, but also make it easier for the user to hold the round tube to ensure that the device is reliably connected to the bolts to be removed.

[0042] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited to the described embodiments. For those skilled in the art, various changes, modifications, substitutions and variations of these embodiments are made without departing from the principles and spirit of the present invention, and still fall within the scope of protection of the present invention.

Claims

1. An auto repair wrench, characterized in that: It comprises a first mounting portion (1) and a second mounting portion (5); a first bevel tooth (6) and a second bevel tooth (8) are arranged inside the first mounting portion (1), and an output shaft (3) is also arranged inside the first mounting portion (1); A driving shaft (2) and a third bevel tooth (7) arranged on the driving shaft (2) are provided inside the second mounting portion (5); the third bevel tooth (7) is meshed between the first bevel tooth (6) and the second bevel tooth (8); The output shaft (3) comprises a cylinder (30), a connecting piece (34) movably mounted on the cylinder (30), and a camshaft (33) arranged inside the cylinder (30); The cylinder (30) is provided with a first keyway (32) and a second keyway (310), and the first keyway (32) and the second keyway (310) are both used to guide the flat key (31) to slide inside the cylinder; The camshaft (33) is rotated so that a first cam (39) on the camshaft (33) causes the flat key (31) in the first keyway (32) to connect with the first bevel tooth (6), thereby driving the output shaft (3) to rotate counterclockwise; The second cam (36) provided on the camshaft (33) is used to cause the flat key (31) inside the second keyway (310) to connect with the second bevel tooth (8), so as to drive the output shaft (3) to rotate clockwise.

2. The auto repair wrench according to claim 1, characterized in that: The first mounting portion (1) is provided with a cover plate (4), which is connected to the first mounting portion (1) via the cover plate (4), so that the facing surfaces of the first bevel tooth (6) and the second bevel tooth (8) are meshed with the third bevel tooth (7).

3. The auto repair wrench according to claim 1, characterized in that: Both ends of the camshaft (33) are also provided with hexagonal holes (38).

4. The auto repair wrench according to claim 1, characterized in that: The connecting member (34) comprises a first polygonal column (311) and a connecting plate (313), and is connected to the cylinder (30) through a fastener passing through the connecting plate (313), so that the connecting member (34) is movably mounted on the cylinder (30).

5. The auto repair wrench according to claim 4, characterized in that: The number of the connecting members (34) is two, and the two connecting members (34) are both located outside the first mounting portion (1).

6. The auto repair wrench according to claim 5, characterized in that: Both ends of the camshaft (33) extend into the connecting member (34) and are connected to an annular groove (312) in the connecting member (34) via a provided snap ring (35) so as to restrict the camshaft (33) within the output shaft (3).

7. An auto repair wrench according to any one of claims 1 to 6, characterized in that: The first cam (39) and the second cam (36) are both provided with a guide groove (37), and the flat key (31) is connected to the guide groove (37) via a provided sliding block (314).

8. The auto repair wrench according to claim 7, characterized in that: A second polygonal column (9) is also provided at one end of the drive shaft (2) away from the third bevel tooth (7).

9. The auto repair wrench according to claim 8, characterized in that: A connection hole (10) is also provided at one end of the second mounting portion (5) away from the first mounting portion (1), and the second polygonal column (9) is located in the connection hole (10).

10. The auto repair wrench according to claim 9, characterized in that: The slider (314) is a sphere, and the slider (314) is a magnet.

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