Shaft lock structure and gearbox box with shaft lock

Abstract

The utility model relates to the technical field of shaft lock gear box structures, in particular to a shaft lock structure and a gear box with a shaft lock, which are provided with a shaft lock chamber and are characterized in that a shaft lock block is arranged in the shaft lock chamber, the middle of the shaft lock block is connected with an output shaft, the side surface of the shaft lock block is connected with a shifting bulge, the shifting bulge comprises a positioning part and a shifting part, and the positioning part is connected with the shifting part. The positioning part is a hexagonal ring body, fan-shaped shifting parts are respectively arranged on three spaced vertexes of the hexagonal ring body, the reduced ends of the fan-shaped shifting parts are integrally connected with the hexagonal ring body, the expanded ends of the fan-shaped shifting parts and the inner wall of the shaft lock chamber are in clearance sliding, and two shaft lock roller pins are arranged between the adjacent shifting parts; the two shaft lock roller pins are distributed between the shifting part and the tip end of the hexagonal ring body, a cavity between the tip end of the hexagonal ring body and the shifting part is a shaft lock cavity, and the shaft lock roller pin has the advantages of being simple in structure, small in size, high in installation speed, high in connection strength, stable in structure, good in shaft lock effect and the like.

Description

Technical Field

[0001] The utility model relates to the technical field of shaft lock gear box structure, in particular to a shaft lock structure and a gear box with shaft lock which has simple structure, small volume, fast installation speed, high connection strength, stable structure and good shaft lock effect. Background Art

[0002] As we all know, electric drills are conventional products among electric tools, and they are also the electric tool products with the largest market demand, accounting for more than 35% of all electric tool sales, and are widely used in the fields of construction, decoration, etc. In DC single-speed electric drills, the variable speed shaft lock gearbox adopts a planetary gear mechanism as a whole. Generally, the shaft lock gearbox generally includes a gear box and a shaft lock chamber. The gear box is a structure that fixes and protects the shaft lock chamber. The shaft lock chamber is connected to the planetary gear and the shaft lock structure. At present, the existing shaft lock chamber and the gear box are connected by a protrusion and a groove. Since protrusions or grooves are respectively provided on the outer wall of the shaft lock chamber and the inner wall of the gear box, in order to increase the connection strength, the increase in the thickness of the protrusion and the groove will inevitably cause the volume of the entire gearbox to increase. In addition, during installation, the protrusions and the grooves need to be installed in correspondence. At the same time, the existing shaft lock structure also has the problem of poor shaft locking effect. Summary of the invention

[0003] The purpose of the utility model is to solve the deficiencies of the above-mentioned prior art and to provide a shaft lock structure and a gear box with a shaft lock which has a simple structure, a small volume, a fast installation speed, a high connection strength, a stable structure and a good shaft locking effect.

[0004] The technical solution adopted by the utility model to solve its technical problems is:

[0005] A shaft lock structure is provided with a shaft lock chamber, characterized in that a shaft lock block is provided in the shaft lock chamber, the middle part of the shaft lock block is connected to the output shaft, the side of the shaft lock block is connected to the toggle protrusion, the toggle protrusion includes a positioning part and a toggle part, the positioning part is a hexagonal ring body, and fan-shaped toggle parts are respectively provided on three spaced vertices of the hexagonal ring body, the reduced end of the fan-shaped toggle part is integrally connected to the hexagonal ring body, the enlarged end of the fan-shaped toggle part slides with a gap with the inner wall of the shaft lock chamber, two shaft lock needle rollers are provided between adjacent toggle parts, the two shaft lock needle rollers are respectively distributed between the toggle part and the tip of the hexagonal ring body, and the chamber between the tip of the hexagonal ring body and the toggle part is the shaft lock chamber.

[0006] A tooth box with an axis lock, comprising a tooth box and an axis lock chamber, characterized in that mounting teeth are evenly distributed on the circumference of the inner wall of the tooth box, at least two groups of insertion teeth are arranged on the outer wall of the axis lock chamber, each group of insertion teeth has at least three teeth, each tooth is engaged with the mounting teeth, and the axis lock chamber is connected with the mounting teeth of the tooth box through the insertion teeth on the outer wall.

[0007] At the end of the gearbox housing of the present utility model, there is a gearbox cover. On the side surface of the gearbox cover, there are two symmetrically arranged insertion blocks. On the side surface of the end of the gearbox housing, there is an insertion cylinder. At the upper end of the insertion cylinder, there is a positioning cover and an insertion hole. After the insertion block is inserted through the insertion hole and the gearbox cover is rotated, the insertion block is rotated into the insertion cylinder below the positioning cover to achieve the fastening of the gearbox cover.

[0008] Between the shaft lock chamber in the gearbox housing of the present utility model and the gearbox cover, a gear assembly is installed.

[0009] The gear assembly of the present utility model includes a first-stage planetary gear, a first-stage planetary carrier, a second-stage planetary gear, and a second-stage planetary carrier. The first-stage planetary gear is connected to the first-stage planetary carrier, the first-stage planetary carrier is connected to the second-stage planetary gear, the second-stage planetary gear is connected to the second-stage planetary carrier, and the first-stage planetary gear is connected to the power end of the motor.

[0010] Between the shaft lock chamber and the gearbox housing of the present utility model, there is a first gasket, and the first gasket is fixed inside the gearbox housing.

[0011] Between the gearbox cover and the gear assembly of the present utility model, there is a second gasket, and the second gasket is fixed on the gearbox housing.

[0012] Outside the output shaft of the gearbox housing of the present utility model, there is a shaft sleeve, and the shaft sleeve is fixedly connected to the gearbox housing.

[0013] Due to adopting the above structure, the present utility model has the advantages of simple structure, small volume, fast installation speed, high connection strength, stable structure, and good shaft locking effect. Brief Description of the Drawings

[0014] Figure 1 is a cross-sectional view of the gearbox housing of the present utility model.

[0015] Figure 2 is a connection relationship diagram of the gearbox housing and the gearbox cover.

[0016] Figure 3 is Figure 1 the connection relationship diagram of the gearbox housing and the shaft lock chamber in

[0017] Figure 4 is a structural schematic diagram of the shaft lock block.

[0018] Figure 5 is a structural schematic diagram of the shaft lock block and the shaft lock needle roller. Detailed Description of the Invention

[0019] The present utility model will be further described below in conjunction with the drawings:

[0020] As shown in the accompanying drawings, a shaft lock structure is provided with a shaft lock chamber 1, characterized in that a shaft lock block 2 is provided in the shaft lock chamber 1, the middle part of the shaft lock block 2 is connected to the output shaft 3, the side of the shaft lock block 2 is connected to the toggle protrusion 4, the toggle protrusion 4 includes a positioning portion 5 and a toggle portion 6, the positioning portion 5 is a hexagonal ring body, and fan-shaped toggle portions 6 are respectively provided on three spaced vertices of the hexagonal ring body, the reduced end of the fan-shaped toggle portion 6 is integrally connected to the hexagonal ring body, and the enlarged end of the fan-shaped toggle portion 6 slides with a gap with the inner wall of the shaft lock chamber 1, and two shaft lock needle rollers 7 are provided between adjacent toggle portions 6, and the two shaft lock needle rollers 7 are respectively distributed between the toggle portion 6 and the tip of the hexagonal ring body, and the chamber between the tip of the hexagonal ring body and the toggle portion 6 is the shaft lock chamber.

[0021] A tooth box 8 for installing the above-mentioned shaft locking mechanism is provided with a tooth box 8 and a shaft locking chamber 1. The inner wall circumference of the tooth box 8 is evenly distributed with mounting teeth 9. The outer wall of the shaft locking chamber 1 is provided with at least two groups of insertion teeth 10. Each group of insertion teeth 10 has at least three teeth. Each tooth is plugged with the mounting teeth 9. The shaft locking chamber 1 is connected with the mounting teeth 9 of the tooth box 8 through the insertion teeth 10 on the outer wall.

[0022] Furthermore, a tooth box cover 11 is provided at the end of the tooth box box 8, and two insertion blocks 12 are symmetrically provided on the side of the tooth box cover 11. An insert tube 13 is provided on the side of the end of the tooth box box 8, and a positioning cover 14 and a socket 15 are provided on the upper end of the insert tube 13. After the insert block 12 is inserted into the socket 15 and the tooth box cover 11 is rotated, the insert block 12 is rotated into the insert tube 13 below the positioning cover 14 to realize the buckling of the tooth box cover 11.

[0023] Furthermore, a gear assembly is installed between the shaft lock chamber 1 in the gear box 8 and the gear box cover 11.

[0024] Furthermore, the gear assembly includes a primary planetary gear 16, a primary planetary carrier 17, a secondary planetary gear 18, and a secondary planetary carrier 19. The primary planetary gear 16 is connected to the primary planetary carrier 17, the primary planetary carrier 17 is connected to the secondary planetary gear 18, the secondary planetary gear 18 is connected to the secondary planetary carrier 19, the primary planetary gear 16 is connected to the power end of the motor, and the secondary planetary carrier is inserted into the shaft lock block of the shaft lock chamber.

[0025] Furthermore, a first gasket 20 is provided between the shaft lock chamber 1 and the gear box 8 , and the first gasket 20 is fixed in the gear box 8 .

[0026] Furthermore, a second gasket 21 is provided between the gear box cover 11 and the gear assembly, and the second gasket 21 is fixed on the gear box 8 .

[0027] Furthermore, a shaft sleeve 22 is sleeved on the outer side of the output shaft 3 of the tooth box box 8 , and the shaft sleeve 22 is fixedly connected to the tooth box box 8 .

[0028] In the utility model, since the shaft lock chamber 1 and the gear box 8 are connected by the meshing insertion connection of the installation teeth 9 and the insertion teeth 10, during installation, there is no need to correspond a single protrusion and groove, and it is only necessary to correspond the installation teeth 9 in the insertion tooth 10 groove that the insertion teeth 10 can correspond to. Moreover, since the insertion teeth 10 have at least three teeth, the connection strength between the insertion teeth 10 and the installation teeth 9 can be made higher. At the same time, a toggle protrusion 4 is provided on one side of the shaft lock block 2 of the patent, and the other end of the shaft lock block 2 is connected to the driving shaft. The toggle protrusion 4 includes a positioning portion 5 and a toggle portion 6. The positioning portion 5 is a hexagonal ring body, and fan-shaped toggle portions 6 are respectively provided on the three spaced vertices of the hexagonal ring body. The reduced end of the fan-shaped toggle portion 6 is integrally connected to the hexagonal ring body, and the enlarged end of the fan-shaped toggle portion 6 slides with the inner wall of the shaft lock chamber 1 in a gap, and the adjacent Two shaft locking needle rollers 7 are provided between the toggle part 6, and the two shaft locking needle rollers 7 are respectively distributed between the toggle part 6 and the tip of the hexagonal ring body. The chamber between the tip of the hexagonal ring body and the toggle part 6 is the shaft locking chamber. This shaft locking block 2 structure can ensure a better shaft locking effect. The above-mentioned gear assembly is a prior art, and other structural forms of the gear assembly are also within the protection scope of this patent. Therefore, it is not repeated here. When this patent is in use, the power end of the motor drives the gear assembly to perform step-by-step transmission, driving the shaft locking block 2 to rotate, and the shaft locking block 2 drives the output shaft 3 to rotate. When the motor stops suddenly, the shaft locking block 2 stops, and the shaft locking needle rollers 7 are squeezed onto the inner wall of the shaft locking chamber 1 for locking. Due to the adoption of the above-mentioned structure, the utility model has the advantages of simple structure, small size, fast installation speed, high connection strength, stable structure, and good shaft locking effect.

Claims

1. A shaft lock structure, provided with a shaft lock chamber, characterized in that A shaft lock block is provided in the shaft lock chamber, the middle part of the shaft lock block is connected to the output shaft, and the side of the shaft lock block is connected to the toggle protrusion, the toggle protrusion includes a positioning part and a toggle part, the positioning part is a hexagonal ring body, and fan-shaped toggle parts are respectively provided on the three spaced vertices of the hexagonal ring body, the reduced end of the fan-shaped toggle part is integrally connected to the hexagonal ring body, and the enlarged end of the fan-shaped toggle part slides with a gap between the inner wall of the shaft lock chamber, and two shaft lock needle rollers are provided between adjacent toggle parts, and the two shaft lock needle rollers are respectively distributed between the toggle part and the tip of the hexagonal ring body, and the chamber between the tip of the hexagonal ring body and the toggle part is the shaft lock chamber.

2. A tooth box with an axis lock, comprising a tooth box and an axis lock chamber, characterized in that The inner wall circumference of the tooth box is evenly distributed with mounting teeth, and the outer wall of the shaft lock chamber is provided with at least two groups of insertion teeth, each group of insertion teeth has at least three teeth, and each tooth is plugged into the mounting teeth. The shaft lock chamber is connected with the mounting teeth of the tooth box through the insertion teeth of the outer wall.

3. A tooth box with an axis lock according to claim 2, characterized in that A tooth box cover is provided at the end of the tooth box box, and two insertion blocks are symmetrically provided on the side of the tooth box cover. An insertion tube is provided on the side of the end of the tooth box box, and a positioning cover and a socket are provided on the upper end of the insertion tube. After the insertion block is inserted through the socket and the tooth box cover is rotated, the insertion block is rotated into the insertion tube below the positioning cover to realize the buckling of the tooth box cover.

4. A tooth box with an axis lock according to claim 2, characterized in that A gear assembly is installed between the shaft lock chamber in the gear box and the gear box cover.

5. A tooth box with an axis lock according to claim 4, characterized in that The gear assembly includes a primary planetary gear, a primary planetary carrier, a secondary planetary gear, and a secondary planetary carrier. The primary planetary gear is connected to the primary planetary carrier, the primary planetary carrier is connected to the secondary planetary gear, the secondary planetary gear is connected to the secondary planetary carrier, and the primary planetary gear is connected to the power end of the motor.

6. A tooth box with an axis lock according to claim 2, characterized in that A first gasket is arranged between the shaft lock chamber and the tooth box, and the first gasket is fixed in the tooth box.

7. A tooth box with an axis lock according to claim 3, characterized in that A second gasket is arranged between the gear box cover and the gear assembly, and the second gasket is fixed on the gear box.

8. A tooth box with an axis lock according to claim 2, characterized in that The outer side of the output shaft of the tooth box is sleeved with a shaft sleeve, and the shaft sleeve is fixedly connected to the tooth box.

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