Impact gearbox

Abstract

The utility model discloses an impact gear box which comprises a gear box body and a gear shifting torsion cup, the gear shifting torsion cup is rotatably arranged on the gear box body in a sleeved mode, a gasket is arranged between the gear shifting torsion cup and the gear box body, the gear shifting torsion cup drives the gasket to rotate on the gear box body, and the gear box body comprises a base and a head. A plurality of guide grooves are formed in the side wall of the head part in the axial direction of the gear box body, clamping blocks are arranged on the inner ring of the gasket, the number of the clamping blocks is the same as that of the guide grooves, an annular groove is formed between the base and the head part, and the gasket is arranged at the position of the annular groove in a sleeving mode; compared with the prior art, after the gear is adjusted to the impact gear and the punching gear, the gasket is clamped on the gear box body, the gear box is kept in the maximum torque state, the gasket is not clamped on the torque adjusting cup, the requirement for the material of the torque adjusting cup can be lowered, the production cost is saved, meanwhile, the gear adjusting torque cup does not need to be fixed to a certain position through extrusion, and the production efficiency is improved. Therefore, the gear shifting torsion cup rotates more smoothly, and gear shifting is easier.

Description

Technical Field

[0001] The utility model relates to the field of power tools, in particular to an impact gearbox. Background Art

[0002] The impact gearbox is an important component on power tools.

[0003] For example, an impact gearbox structure and a power tool with an impact function disclosed in CN213002805U include a gearbox body, a gear shifting assembly, an impact assembly, a torque cup and a gland. The torque cup is divided into a first torque cup and a second torque cup which are matched up and down. A washer is arranged inside the second torque cup, and the washer is sleeved outside the gearbox body.

[0004] In the above structure of the impact gearbox, the washer is arranged inside the second torque cup. When the washer rotates and is adjusted to the impact gear position, the second torque cup abuts against the washer to limit the up and down sliding of the washer, so as to achieve the maximum torque. Therefore, the material requirements for the second torque cup are relatively high, resulting in an increase in production costs. Otherwise, it will cause damage to the second torque cup. At the same time, it is also necessary to make the first torque cup abut against the second torque cup, and the first torque cup and the second torque cup are mutually extruded, resulting in relatively difficult rotation adjustment of the second torque cup or the first torque cup. Content of the Utility Model

[0005] The technical problem to be solved by the utility model is to provide an impact gearbox with easier adjustment and cost savings.

[0006] The technical solution adopted by the utility model to solve the above technical problem is as follows: an impact gearbox includes a gearbox body and a gear shifting torque cup. The gear shifting torque cup is rotatably sleeved on the gearbox body. A washer is arranged between the gear shifting torque cup and the gearbox body. The gear shifting torque cup drives the washer to rotate on the gearbox body. The gearbox body includes a base and a head. A plurality of guiding grooves are arranged on the side wall of the head along the axial direction of the gearbox body. The same number of clamping blocks as the guiding grooves are arranged on the inner ring of the washer. An annular groove is arranged between the base and the head. The washer is sleeved at the position of the annular groove.

[0007] First state: The clamping blocks are aligned with the guiding grooves, and the washer can move along the axial direction of the gearbox body on the head.

[0008] Second state: The gear shifting torque cup drives the washer to rotate, and the clamping blocks on the washer abut against the head to make the washer clamped between the base and the head.

[0009] A further preferred solution of the utility model is that a plurality of clamping protrusions are arranged on the outer ring of the washer, and a plurality of clamping grooves with the same number as the clamping protrusions are arranged on the inner wall of the gear shifting torque cup.

[0010] A further preferred embodiment of the present utility model is that the upper end of the card slot is open. In the first state, the card-catching protrusion can slide axially along the gear box body within the card slot.

[0011] A further preferred embodiment of the present utility model is that a driving gear set and a tripping gear ring are arranged inside the base, and the driving gear set can drive the tripping gear ring to rotate.

[0012] A further preferred embodiment of the present utility model is that steel columns and steel balls are arranged between the tripping gear ring and the washer, and the steel columns and steel balls are abutted between the washer and the tripping gear ring.

[0013] A further preferred embodiment of the present utility model is that protrusions are arranged on the tripping gear ring. In the second state, the steel balls abut against the protrusions to limit the rotation of the tripping gear ring.

[0014] A further preferred embodiment of the present utility model is that the adjusting torque cup is made of plastic material.

[0015] Compared with the prior art, the advantages of the present utility model are that an annular groove is provided between the base and the head, the washer is sleeved at the position of the annular groove. In the first state: the card block is aligned with the guide groove, and the washer can move axially along the gear box body on the head; in the second state: the shifting torque cup drives the washer to rotate, and the card block on the washer abuts against the head to make the washer stuck between the base and the head. Compared with the prior art, after being adjusted to the impact gear and the drilling gear, the washer is stuck on the gear box body, so that the gear box maintains the maximum torque state, and the washer is not stuck on the adjusting torque cup, thus the material requirement for the adjusting torque cup can be reduced, the production cost is saved. At the same time, the shifting torque cup does not need to be fixed at a certain position by extrusion, making the shifting torque cup rotate more smoothly and the gear shifting easier. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present utility model will be further described in detail below in conjunction with the drawings and preferred embodiments. However, those skilled in the art will understand that these drawings are only drawn for the purpose of explaining the preferred embodiments and should not be regarded as limiting the scope of the present utility model. In addition, unless otherwise specified, the drawings only schematically show the composition or structure of the described object and may include exaggerated displays, and the drawings are not necessarily drawn to scale.

[0017] Figure 1 is a schematic structural diagram of a preferred embodiment of the present utility model;

[0018] Figure 2 is a partial structural schematic diagram of a preferred embodiment of the present utility model;

[0019] Figure 3 is a schematic diagram of a preferred embodiment of the present utility model in the first state;

[0020] Figure 4 Schematic diagram of the preferred embodiment of the present utility model in the second state;

[0021] Figure 5 Schematic diagram of the internal structure of the gearbox in the preferred embodiment of the present utility model;

[0022] Figure 6 Schematic diagram of the gearbox body in the preferred embodiment of the present utility model;

[0023] Figure 7 Schematic diagram of the washer in the preferred embodiment of the present utility model;

[0024] Figure 8 Schematic diagram of the shifting torque cup in the preferred embodiment of the present utility model.

[0025] In the figure: 1. Gearbox body; 11. Base; 12. Head; 13. Ring groove; 14. Guide groove; 2. Shifting torque cup; 21. Card slot; 3. Driving gear set; 4. Output shaft; 5. Release gear ring; 51. Guide ring groove; 52. Protrusion; 6. Steel column; 61. Steel ball; 7. Washer; 71. Spring; 72. Clamping protrusion; 73. Clamping block. Detailed implementation manners

[0026] The preferred embodiments of the present utility model will be described in detail below with reference to the accompanying drawings. Those skilled in the art will appreciate that these descriptions are only descriptive and exemplary, and should not be construed as limiting the protection scope of the present utility model.

[0027] It should be noted that: Similar reference numerals denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it may not be further defined and explained in subsequent drawings.

[0028] The impact gearbox includes a gearbox body 1 and a shifting torque cup 2, and the shifting torque cup 2 is rotatably sleeved on the gearbox body 1.

[0029] A driving gear set 3, an output shaft 4 and a release gear ring 5 are arranged in the gearbox body 1. After the driving gear set 3 operates, it always drives the output shaft 4 to rotate, and the driving gear set 3 can drive the release gear ring 5 to rotate.

[0030] A washer 7 is arranged between the shifting torque cup 2 and the gearbox body 1. The shifting torque cup 2 drives the washer 7 to rotate on the gearbox body 1, and a spring 71 for its reset is arranged on the washer 7.

[0031] A plurality of clamping protrusions 72 are arranged on the outer ring of the washer 7, and a number of card slots 21 identical to the clamping protrusions 72 are formed on the inner wall of the shifting torque cup 2.

[0032] The gear box body 1 includes a base 11 and a head 12. The base 11 and the head 12 are integrally formed. A ring groove 13 is provided between the base 11 and the head 12. The washer 7 is sleeved at the position of the ring groove 13. A plurality of guiding grooves 14 are provided on the side wall of the head 12 along the axial direction of the gear box body 1. The inner ring of the washer 7 is provided with clamping blocks 73 having the same number as the guiding grooves 14.

[0033] A steel column 6 and steel balls 61 are provided between the release gear ring 5 and the washer 7. The steel column 6 and the steel balls 61 are abutted between the washer 7 and the release gear ring 5. The top end of the steel column 6 abuts on the washer 7. The steel balls 61 are abutted between the steel column 6 and the release gear ring 5 and are in rolling fit with both of them.

[0034] Further, a guiding ring groove 51 is provided on the release gear ring 5, and the steel balls 61 roll in the guiding ring groove 51.

[0035] The release gear ring 5 is provided with a protrusion 52. When the washer 7 abuts on the head 12, the protrusion 52 will abut on the steel balls 61, so that the release gear ring 5 cannot rotate. At this time, the gear box is in the state of maximum torque.

[0036] The first state: The clamping blocks 73 are aligned with the guiding grooves 14. The release gear ring 5 rotates. The protrusion 52 can push up the steel column 6 through the steel balls 61. The steel column 6 pushes the washer 7 to move upward. When the protrusion 52 disengages from the steel balls 61, under the action of the spring 71, the washer 7 is pushed to reset downward.

[0037] The second state: The gear shifting torque cup 2 drives the washer 7 to rotate. The clamping blocks 73 on the washer 7 abut on the head 12, so that the washer 7 is clamped between the base 11 and the head 12, making the washer 7 unable to move up and down. And the washer 7 abuts on the steel column 6 and the steel balls 61, and the protrusion 52 abuts on the steel balls 61, making the release gear ring 5 unable to rotate. At this time, the gear box is in the state of maximum torque.

[0038] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the present utility model is usually placed during use. It is only for the convenience of describing the present utility model 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 to the present utility model.

[0039] The above has introduced the impact gearbox provided by the present utility model in detail. Specific examples are used in this article to elaborate on the principle and implementation manner of the present utility model. The description of the above embodiments is only used to help understand the present utility model and its core idea. It should be noted that for those of ordinary skill in the art of this technology, without departing from the principle of the present utility model, several improvements and modifications can still be made to the present utility model, and these improvements and modifications also fall within the protection scope of the claims of the present utility model.

Claims

1. Impact gearbox, comprising a gearbox body and a gear shifting torque cup, the gear shifting torque cup is rotatably sleeved on the gearbox body, a washer is arranged between the gear shifting torque cup and the gearbox body, the gear shifting torque cup drives the washer to rotate on the gearbox body, the gearbox body includes a base and a head, a plurality of guiding grooves are formed in the side wall of the head along the axial direction of the gearbox body, and the inner ring of the washer is provided with clamping blocks having the same number as the guiding grooves, and is characterized in that: A ring groove is formed between the base and the head, and the gasket is sleeved at the position of the ring groove; First state: The clamping block is aligned with the guide groove, and the gasket can move axially along the gear box body on the head; Second state: The shifting torque cup drives the gasket to rotate, and the clamping block on the gasket abuts against the head to make the gasket clamped between the base and the head.

2. The impact gearbox according to claim 1, characterized in that: A number of clamping protrusions are arranged on the outer ring of the gasket, and a number of clamping grooves identical to the clamping protrusions are formed on the inner wall of the shifting torque cup.

3. The impact gearbox according to claim 2, wherein: The upper end of the clamping groove is open. In the first state, the clamping protrusion can slide axially in the clamping groove.

4. The impact gearbox according to claim 1, wherein: A driving gear set and a release gear ring are arranged in the base, and the driving gear set can drive the release gear ring to rotate.

5. The impact gearbox according to claim 4, characterized in that: A steel column and a steel ball are arranged between the release gear ring and the gasket, and the steel column and the steel ball abut between the gasket and the release gear ring.

6. The impact gearbox according to claim 5, characterized in that: A protrusion is arranged on the release gear ring. In the second state, the steel ball abuts against the protrusion to limit the rotation of the release gear ring.

7. The impact gearbox according to claim 1, wherein: The adjusting torque cup is made of plastic material.

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