Left-right difference ratchet wheel structure

Abstract

The utility model discloses a left-right difference ratchet wheel structure which comprises a handle body head, a center installation hole is formed in the middle of the top face of the handle body head, a lower adjusting groove extending backwards is formed in the inner side wall of the middle of the rear portion of the center installation hole, and an installation through hole extending upwards is formed in the bottom face of the rear portion of the handle body head. The ratchet head is inserted into the center mounting hole in a sleeved mode, an outer tooth part is formed on the outer side wall of the ratchet head, a pawl block is inserted into the lower adjusting groove in a sleeved mode, a tooth-shaped part is formed on the front wall face of the pawl block, the tooth-shaped part is matched with the outer tooth part, one half of the tooth-shaped part is a large tooth part, and the other half of the tooth-shaped part is a small tooth part. And the size of the large tooth part is twice that of the small tooth part. Half of a tooth-shaped part of a pawl block is a large tooth part, the other half of the tooth-shaped part of the pawl block is a small tooth part, and the size of the large tooth part is twice that of the small tooth part.

Description

Technical fields:

[0001] This utility model relates to the field of fastener tool and equipment technology, and more specifically to a left-right differential ratchet structure. Background technology:

[0002] In existing ratchet wrenches, the ratchet head and pawl are typically equipped with corresponding teeth to achieve their engagement.

[0003] The size of the teeth and grooves on the outer wall of the existing ratchet head matches the size of the teeth and grooves at the pawl. At this time, the minimum rotation angle is 360° divided by the number of teeth. For example, if the number of teeth on the outer wall of the ratchet head reaches 90, then its minimum rotation angle is 4°. Since the number of teeth on the ratchet head of existing ratchet wrenches is fixed, the minimum rotation angle is also consistent, which makes its application range relatively small. Utility Model Content:

[0004] The purpose of this utility model is to overcome the shortcomings of the existing technology and provide a left-right differential ratchet structure. Half of the teeth of its pawl block are large teeth, and the other half are small teeth. The size of the large teeth is twice that of the small teeth. At the same time, the ratchet head is provided with a square connecting head and a lower square connecting head, so that it can be adjusted to two minimum rotation angles by rotating the pawl block and flipping the handle head to meet different usage needs.

[0005] The solution of this utility model to the aforementioned technical problem is:

[0006] A left-right differential ratchet structure includes a handle head. A central mounting hole is formed in the middle of the top surface of the handle head. A rearwardly extending lower adjustment groove is formed in the inner sidewall of the rear part of the central mounting hole. An upwardly extending mounting through hole is formed in the bottom rear part of the handle head, which communicates with the lower adjustment groove. The middle and rear parts of the mounting through hole are located behind the lower adjustment groove. A ratchet head is inserted into the central mounting hole. An external tooth is formed on the outer side wall of the ratchet head. A pawl block is inserted into the lower adjustment groove. The front wall of the pawl block is an arc-shaped wall, and a toothed part is formed on the arc-shaped wall. The toothed part mates with the external toothed part. Half of the toothed part is a large tooth, and the other half is a small tooth. The size of the large tooth is twice that of the small tooth.

[0007] The tooth groove of the outer tooth portion mates with the large tooth portion of the tooth-shaped portion, and the two small teeth portion mate with the tooth groove of the outer tooth portion.

[0008] The vertical column of the steering gear is inserted into the mounting through hole. The front side wall of the vertical column is formed with a mounting through hole. A hollow positioning pin is inserted into the side mounting through hole. A buffer spring is inserted into the side mounting through hole. The rear end of the buffer spring is pressed against the inner end face of the side mounting through hole. The buffer spring is inserted into the hollow positioning pin. The front end of the buffer spring is pressed against the inner side wall of the front end of the hollow positioning pin. The front end of the hollow positioning pin extends out of the side mounting through hole and is located in the lower adjustment groove. It is inserted into the central groove formed in the middle of the rear wall of the pawl block. The inner wall of the central groove is an arc-shaped wall. The front wall of the hollow positioning pin is a spherical wall, which is pressed against the inner wall of the central groove.

[0009] The top surface of the ratchet head has a cylindrical transition portion extending vertically upward, and the top surface of the cylindrical transition portion has a square connecting head.

[0010] The bottom surface of the ratchet head has a downwardly extending lower cylindrical transition portion formed in the middle. The lower cylindrical transition portion is inserted into the lower through hole formed in the middle of the top surface of the central mounting hole. The bottom of the lower cylindrical transition portion extends out of the lower through hole formed in the middle of the bottom surface of the central mounting hole and has a lower square connecting head formed thereon.

[0011] The outstanding effect of this utility model is:

[0012] Compared with the existing technology, half of the teeth of its pawl block are large teeth and the other half are small teeth. The size of the large teeth is twice that of the small teeth. At the same time, the ratchet head is provided with a square connecting head and a lower square connecting head, which allows it to adjust two minimum rotation angles by rotating the pawl block and flipping the handle head to meet different usage needs. Attached image description:

[0013] Figure 1 This is a schematic diagram of the structure of this utility model;

[0014] Figure 2 This is a partial structural diagram of the angle-changing part of this utility model;

[0015] Figure 3 This is an exploded view of the present invention;

[0016] Figure 4 This is a partial structural schematic diagram of the ratchet block of this utility model;

[0017] Figure 5 This is a simplified schematic diagram of the small torque point of this utility model;

[0018] Figure 6 This is a simplified schematic diagram of the high torque point of this utility model;

[0019] Figure 7 This is a partial structural diagram of the steering gear. Detailed implementation method:

[0020] For example, see below. Figures 1 to 7 As shown, a left-right differential ratchet structure includes a handle head 10. A central mounting hole 11 is formed in the center of the top surface of the handle head 10. A rearwardly extending lower adjustment groove 12 is formed on the inner sidewall of the rear portion of the central mounting hole 11. An upwardly extending mounting through hole 13 is formed on the bottom rear portion of the handle head 11. The mounting through hole 13 communicates with the lower adjustment groove 12. The middle and rear portions of the mounting through hole 13 are located behind the lower adjustment groove 12. A ratchet head 20 is inserted into the ratchet. In the central mounting hole 11, an external tooth 21 is formed on the outer side wall of the ratchet head 20. A pawl block 30 is inserted into the lower adjustment groove 12. The front wall of the pawl block 30 is an arc-shaped wall, and a tooth 31 is formed on the arc-shaped wall. The tooth 31 cooperates with the external tooth 21. Half of the tooth 31 is a large tooth, and the other half is a small tooth. The size of the large tooth is twice that of the small tooth, and the groove of the large tooth is twice that of the small tooth.

[0021] The tooth groove of the outer tooth portion 21 mates with the large tooth portion of the tooth-shaped portion 31, and the two small teeth mate with the tooth groove of the outer tooth portion 21.

[0022] Furthermore, the vertical column 51 of the steering gear 50 is inserted into the mounting through hole 13. The front side wall of the vertical column 51 is formed with a mounting through hole 52. The hollow positioning pin 53 is inserted into the side mounting through hole 52. The buffer spring 54 is inserted into the side mounting through hole 52. The rear end of the buffer spring 54 is against the inner end face of the side mounting through hole 52. The buffer spring 54 is inserted into the hollow positioning pin 53. The front end of the buffer spring 54 is against the inner side wall of the front end of the hollow positioning pin 53. The front end of the hollow positioning pin 53 extends out of the side mounting through hole 52 and is located in the lower adjustment groove 12. It is inserted into the central groove formed in the middle of the rear wall of the pawl block 30. The inner wall of the central groove is an arc-shaped wall. The front wall of the hollow positioning pin 53 is a spherical wall. It presses against the inner wall of the central groove 32.

[0023] The ratchet head 20 has an upwardly extending cylindrical transition portion 24 formed in the middle of its top surface, and a square connecting head 25 is formed in the middle of the top surface of the cylindrical transition portion 24.

[0024] The bottom surface of the ratchet head 20 has a downwardly extending lower cylindrical transition portion 26 formed in the middle. The lower cylindrical transition portion 26 is inserted into the lower through hole formed in the middle of the top surface of the central mounting hole 11. The bottom of the lower cylindrical transition portion 26 extends out of the lower through hole formed in the middle of the bottom surface of the central mounting hole 11 and has a lower square connecting head 27 formed thereon.

[0025] The steering gear 50 includes a bottom rotating part 55, and a vertical column 51 is formed on the front top surface of the bottom rotating part 55. The rear wall of the vertical column 51 is in close contact with the inner side wall of the mounting through hole 13. A rearwardly extending groove 14 is formed on the bottom surface of the handle head 10 at the bottom of the mounting through hole 13. The rear part of the bottom rotating part 55 is located in the groove 14, and the rear top surface of the bottom rotating part 55 presses against the top surface of the groove 14.

[0026] The top surface of the handle head 10 is formed with a waist-shaped groove 15. The central mounting hole 11, the lower adjustment groove 12 and the mounting through hole 13 are all located at the bottom of the waist-shaped groove 15. The cover plate 60 is inserted into the waist-shaped groove 15 and is fixedly connected to the handle head 10 by bolts. The gasket 9 is inserted into the cylindrical transition part 24 and is clamped between the cover plate 60 and the edge of the top surface of the ratchet head 20. The cylindrical transition part 24 is inserted into the central through hole of the cover plate 60 and its top surface extends out of the top of the central through hole of the cover plate 60.

[0027] In this embodiment, as Figure 5 and Figure 6 As shown, Figure 5 In the middle, by rotating the steering gear 50, the pawl block 30 is moved to the left, so that the two small teeth mesh with the corresponding external teeth 21, so that the minimum rotation angle of the ratchet head 20 is reduced. For example, if the number of teeth of the external teeth 21 of the ratchet head 20 is 90, and the small teeth are half the size of the teeth of the external teeth 21, then its minimum rotation angle is 2°.

[0028] like Figure 6 As shown, the steering gear 50 rotates at this time, moving the pawl block 30 to the right, so that the large tooth part meshes with the corresponding external tooth part 21, making the minimum rotation angle of the ratchet head 20 larger. For example, if the number of teeth of the external tooth part 21 of the ratchet head 20 is 90, and the size of the large tooth part and the tooth part of the external tooth part 21 are the same, then its minimum rotation angle is 4°.

[0029] When in use, the handle head 10 can be flipped according to the rotation requirements, and the sleeve can be installed on the square connecting head 25 or the lower square connecting head 27. With the large and small teeth of the pawl block 30, the minimum angle conversion can be achieved as needed to meet different usage environments and usage requirements.

[0030] Finally, the above embodiments are only used to illustrate the present utility model and are not intended to limit the present utility model. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present utility model. Therefore, all equivalent technical solutions also fall within the scope of the present utility model, and the patent protection scope of the present utility model should be defined by the claims.

Claims

1. A left-right differential ratchet structure, comprising a handle head (10), wherein a central mounting hole (11) is formed in the middle of the top surface of the handle head (10), a rearwardly extending lower adjustment groove (12) is formed in the inner sidewall of the rear part of the central mounting hole (11), an upwardly extending mounting through hole (13) is formed in the bottom surface of the rear part of the handle head (11), the mounting through hole (13) communicates with the lower adjustment groove (12), the middle and rear parts of the mounting through hole (13) are located behind the lower adjustment groove (12), a ratchet head (20) is inserted into the central mounting hole (11), and an external tooth portion (21) is formed on the outer sidewall of the ratchet head (20), characterized in that: A pawl block (30) is inserted into the lower adjustment groove (12). The front wall of the pawl block (30) is an arc-shaped wall, and a toothed part (31) is formed on the arc-shaped wall. The toothed part (31) cooperates with the outer toothed part (21). Half of the toothed part (31) is a large toothed part, and the other half is a small toothed part. The size of the large toothed part is twice that of the small toothed part.

2. The left and right differential ratchet structure according to claim 1, characterized in that: The tooth groove of the outer tooth portion (21) mates with the large tooth portion of the tooth-shaped portion (31), and the two small teeth mate with the tooth groove of the outer tooth portion (21).

3. The left and right differential ratchet structure according to claim 1, characterized in that: The vertical column (51) of the steering gear (50) is inserted into the mounting through hole (13). The front side wall of the vertical column (51) is formed with a mounting through hole (52). A hollow positioning pin (53) is inserted into the side mounting through hole (52). A buffer spring (54) is inserted into the side mounting through hole (52). The rear end of the buffer spring (54) is engaged with the inner end face of the side mounting through hole (52). The buffer spring (54) is inserted into the hollow positioning pin (53). In the middle, the front end of the buffer spring (54) is pressed against the inner side wall inside the front end of the hollow positioning pin (53). The front end of the hollow positioning pin (53) is installed in the through hole (52) and is located in the lower adjustment groove (12). It is inserted into the central groove formed in the middle of the rear wall of the pawl block (30). The inner wall of the central groove is an arc-shaped wall, and the front wall of the hollow positioning pin (53) is a spherical wall, which is pressed against the inner wall of the central groove (32).

4. The left and right differential ratchet structure according to claim 1, characterized in that: The ratchet head (20) has a cylindrical transition portion (24) extending vertically upward in the middle of its top surface, and a square connecting head (25) is formed in the middle of the top surface of the cylindrical transition portion (24). The bottom surface of the ratchet head (20) is formed with a downwardly extending lower cylindrical transition part (26) in the middle. The lower cylindrical transition part (26) is inserted into the lower through hole formed in the middle of the top surface of the central mounting hole (11). The bottom of the lower cylindrical transition part (26) extends out of the lower through hole formed in the middle of the bottom surface of the central mounting hole (11) and is formed with a lower square connecting head (27).

5. The left and right differential ratchet structure according to claim 1, characterized in that: The steering gear (50) includes a bottom rotating part (55), the front top surface of the bottom rotating part (55) is formed with a vertical column (51), the rear wall surface of the vertical column (51) is in close contact with the inner side wall of the mounting through hole (13); the bottom surface of the handle head (10) at the bottom of the mounting through hole (13) is formed with a rearwardly extending groove (14), the rear part of the bottom rotating part (55) is in the groove (14), and the rear top surface of the bottom rotating part (55) presses against the top surface of the groove (14).

6. The left and right differential ratchet structure according to claim 1, characterized in that: The top surface of the handle head (10) is formed with a waist-shaped groove (15). The central mounting hole (11), the lower adjustment groove (12) and the mounting through hole (13) are all located at the bottom of the waist-shaped groove (15). The cover plate (60) is inserted into the waist-shaped groove (15) and is fixedly connected to the handle head (10) by bolts. The gasket (9) is inserted into the cylindrical transition part (24) and is clamped between the cover plate (60) and the edge of the top surface of the ratchet head (20). The cylindrical transition part (24) is inserted into the central through hole of the cover plate (60) and its top surface extends out of the top of the central through hole of the cover plate (60).

Images