Detachable impact device for electric tool

Abstract

The utility model discloses a detachable impact device for an electric tool, which comprises a left gearbox shell and a right gearbox shell which are connected through a first PIN and a first screw to form a hollow cavity, a switching ring is arranged outside the hollow cavity, an output shaft, a transmission shaft and a transmission disc are arranged inside the hollow cavity, a connecting plate is arranged on the outer side of the transmission disc, a slot and a bulge are arranged on the connecting plate, and the left gearbox shell and the right gearbox shell are connected through a second PIN and a second screw. A connecting buckle is arranged on the open groove, a connecting column is arranged in the middle of the connecting buckle, compression springs are connected to the two ends of the connecting column, an elastic structure is arranged at the position, corresponding to the connecting buckle, in the switching ring, and a visual locking hole and a visual unlocking hole are formed in the outer side, corresponding to the elastic structure, of the switching ring. When in use, the bulge on the connecting plate is clamped with the groove of the fixing plate and the connecting plate on the host, and the switching ring is rotated to drive the elastic structure to lock, so that the mounting is completed, and if the dismounting is needed, the switching ring is rotated to drive the elastic structure to unlock, so that the dismounting can be completed very conveniently.

Description

Technical Field

[0001] The utility model relates to the technical field related to electric tools, and in particular to a detachable impact device for electric tools. Background Art

[0002] Electric tools mainly include a main unit and a transmission unit, and the main unit and the transmission unit are usually integrated into one. For example, electric drills, electric screwdrivers, impact drills, etc. When you need to carry and use more than two tools, you need to carry both the main unit and the transmission unit of the two tools. At the same time, the weight of the tools themselves will bring a relatively large burden to the carrier.

[0003] Therefore, it is necessary to provide a detachable impact device for an electric tool to overcome the above-mentioned defects. Utility Model Content

[0004] The main purpose of the utility model is to overcome the deficiencies in the prior art and provide a detachable impact device for an electric tool to solve the problems in the prior art.

[0005] To achieve the above-mentioned purpose, the technical solution provided by the utility model is: a detachable impact device for an electric tool, comprising a left gear box shell and a right gear box shell, the left gear box shell and the right gear box shell are connected to form a hollow cavity by a first PIN needle and a first screw, a switching ring is sleeved on the left outer side of the hollow cavity, an output shaft, a transmission shaft and a transmission disk are sequentially arranged in the hollow cavity from right to left, an output shaft rubber ring and a metal ring are arranged on the outer end of the output shaft, a sleeve is arranged between the output shaft and the hollow cavity, an impact block is sleeved between the inner end of the output shaft and the middle of the transmission shaft to the inner end of the output shaft, a convex disk is extended outward from the lower part of the transmission shaft, an impact spring is arranged between the convex disk and the impact block, a connecting plate is sleeved on the outer side of the end of the transmission disk, slots and protrusions are symmetrically arranged on the connecting plate, a connecting buckle is arranged on the slot, a connecting column running through both sides is arranged in the middle of the connecting buckle, compression springs are connected to the two ends of the connecting column, an elastic structure is arranged at the position corresponding to the connecting buckle in the switching circle, and a visible locking hole and a visible unlocking hole are arranged on the outer side of the switching circle corresponding to the elastic structure.

[0006] As a further solution of the utility model, it is characterized in that: a first steel ball is arranged between the impact spring and the impact block, and a second steel ball is arranged between the shaft portion of the transmission shaft and the impact block.

[0007] As a further solution of the utility model, it is characterized in that a steel ball supporting gasket is provided between the impact spring and the first steel ball.

[0008] As a further solution of the utility model, it is characterized in that: a first ball bearing is provided between the outer side of the convex disk and the hollow cavity, an internal gear is provided on one side of the first ball bearing, and a plurality of planetary gears are meshedly provided on the inner side of the internal gear.

[0009] As a further solution of the utility model, it is characterized in that: the planetary gear is fixed on the transmission plate through a second PIN needle.

[0010] As a further solution of the utility model, it is characterized in that a second ball bearing is sleeved on the middle part of the transmission plate.

[0011] As a further solution of the utility model, it is characterized in that a fixing sleeve is sleeved on the outer side of the lower part of the transmission plate.

[0012] As a further solution of the utility model, it is characterized in that: the connecting plate is fixedly connected to the left gear box shell and the right gear box shell by a second screw.

[0013] Compared with the prior art, the utility model has the following beneficial effects:

[0014] The present invention discloses a detachable impact device for an electric tool, comprising a left gear box shell and a right gear box shell, which are connected to form a hollow cavity by a first PIN needle and a first screw, a switching ring is sleeved on the left outer side of the hollow cavity, an output shaft, a transmission shaft and a transmission disc are sequentially arranged in the hollow cavity from right to left, an output shaft rubber ring and a metal ring are arranged on the outer end of the output shaft, a shaft sleeve is arranged between the output shaft and the hollow cavity, an impact block is sleeved between the inner end of the output shaft and the middle of the transmission shaft to the inner end of the output shaft, a convex disc is extended outward from the lower part of the transmission shaft, an impact spring is arranged between the convex disc and the impact block, a connecting plate is sleeved on the outer side of the end of the transmission disc, slots and protrusions are symmetrically arranged on the connecting plate, a connecting buckle is arranged on the slot, a connecting column running through both sides is arranged in the middle of the connecting buckle, compression springs are connected to both ends of the connecting column, an elastic structure is arranged at a position corresponding to the connecting buckle in the switching ring, and a visible locking hole and a visible unlocking hole are arranged on the outer side of the switching ring corresponding to the elastic structure. When the device is in use, the protrusion on the connecting plate is engaged with the groove of the fixed plate connecting plate on the main unit, and then the switching ring is rotated to drive the loose structure to be locked, thereby completing its installation. If disassembly is required, the switching ring is rotated to drive the loose structure to be unlocked, and disassembly can be completed, which is very convenient; at the same time, it also provides convenience for carrying a variety of power tools. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a complete explosion diagram of a detachable impact device for an electric tool of the utility model;

[0016] Figure 2 It is a schematic diagram of the longitudinal cross-section structure of a detachable impact device for an electric tool according to the utility model;

[0017] Figure 3 It is a three-dimensional structural schematic diagram of a detachable impact device for an electric tool according to the utility model;

[0018] Figure 4 It is a left-side structural schematic diagram of a detachable impact device for an electric tool according to the utility model;

[0019] Description of components in the legend: 1-left gearbox housing; 2-first PIN needle; 3-sleeve; 4-output shaft; 5-output shaft rubber ring; 6-metal ring; 7-transmission shaft; 8-impact spring; 9-steel ball support gasket; 10-first steel ball; 11-impact block; 12-second steel ball; 13-first ball bearing; 14-planetary gear; 15-transmission plate; 16-second PIN needle; 17-second ball bearing; 18-internal gear; 19-compression spring; 20-connecting buckle; 21-fixing sleeve; 22-right gearbox housing; 23-first screw; 25-switching ring; 251-elasticity structure; 252-visible locking hole; 253-visible unlocking hole; 26-connecting plate; 27-second screw. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] Example 1

[0022] Please see Figure 1-4In one embodiment of the utility model, a detachable impact device for an electric tool includes a left gear box shell 1 and a right gear box shell 22, which are connected to form a hollow cavity through a first PIN needle 2 and a first screw 23, a switching ring 25 is sleeved on the left side of the hollow cavity, and an output shaft 4, a transmission shaft 7 and a transmission disk 15 are arranged in sequence from right to left in the hollow cavity, a groove is arranged inwardly at the end of the output shaft 4, a protrusion is arranged on the transmission shaft, and the transmission shaft 7 is connected to the output shaft through the protrusion and the groove. An output shaft rubber ring 5 and a metal ring 6 are provided at the outer end of the output shaft 4, a shaft sleeve 3 is provided between the output shaft 4 and the hollow cavity, an impact block 11 is sleeved between the inner end of the output shaft 4 and the middle of the transmission shaft 7 toward the inner end of the output shaft 4, a convex disc is extended outward from the lower part of the transmission shaft 7, an impact spring 8 is provided between the convex disc and the impact block 11, a connecting plate 26 is sleeved on the outer side of the end of the transmission plate 15, the connecting plate 26 is fixedly connected to the left gear box shell 1 and the right gear box shell 22 by a second screw 27, the connecting plate 26 is symmetrically provided with grooves and protrusions, a connecting buckle 20 is provided on the groove, a connecting column running through both sides is provided in the middle of the connecting buckle 20, and compression springs 19 are connected at both ends of the connecting column, an elastic structure 251 is provided at the position corresponding to the connecting buckle 20 in the switching circle 25, and a visible locking hole 252 and a visible unlocking hole 253 are provided on the outer side of the switching circle 25 corresponding to the elastic structure 251. When in use, the installation is completed by engaging the protrusion on the connecting plate with the groove of the fixed plate connecting plate on the main unit, and then rotating the switching ring to drive the elastic structure to lock it. If disassembly is required, the switching ring is rotated to unlock the elastic structure to complete the disassembly, which is very convenient. At the same time, it also provides convenience for carrying a variety of power tools.

[0023] Based on the above embodiment, in order to increase the stability of the impact spring 8 , a first steel ball 10 is provided between the impact spring 8 and the impact block 11 , and a second steel ball 12 is provided between the shaft portion of the transmission shaft 7 and the impact block 11 .

[0024] Based on the above embodiment, in order to facilitate the fixation of the first steel ball 10 , a steel ball support gasket 9 is provided between the impact spring 8 and the first steel ball 10 .

[0025] Based on the above embodiment, in order to reduce the friction during movement, a first ball bearing 13 is provided between the outer side of the convex disc and the hollow cavity, an internal gear 18 is provided on one side of the first ball bearing 13, and a plurality of planetary gears 14 are meshedly provided on the inner side of the internal gear 18. The transmission of the planetary gear 14 has the characteristics of small size, large load-bearing capacity and stable operation, which facilitates the detachable impact device to speed up when performing impact work.

[0026] Based on the above embodiment, in order to facilitate the fixation of the planetary gear 14 , the planetary gear 14 is fixed on the transmission plate 15 via the second PIN needle 16 .

[0027] Based on the above embodiment, in order to make the transmission disc 15 more stable, a second ball bearing 17 is sleeved on the middle of the transmission disc 15 , and a fixing sleeve 21 is sleeved on the outer side of the lower part of the transmission disc 15 .

[0028] The above detailed description is a specific description of a feasible embodiment of the present invention, but the embodiment is not intended to limit the patent scope of the present invention. Any equivalent implementation or modification that does not deviate from the technical spirit of the present invention should be included in the patent scope of this case.

Claims

1. A detachable impact device for an electric tool, characterized in that: The invention comprises a left gear box shell (1) and a right gear box shell (22), wherein the left gear box shell (1) and the right gear box shell (22) are connected to form a hollow cavity through a first PIN needle (2) and a first screw (23), a switching ring (25) is sleeved on the left side of the hollow cavity, an output shaft (4), a transmission shaft (7) and a transmission plate (15) are sequentially arranged in the hollow cavity from right to left, an output shaft rubber ring (5) and a metal ring (6) are arranged at the outer end of the output shaft (4), a shaft sleeve (3) is arranged between the output shaft (4) and the hollow cavity, and an impact block (11) is sleeved between the inner end of the output shaft (4) and the middle of the transmission shaft (7) toward the inner end of the output shaft (4) The transmission shaft (7) is provided with a convex disc extending outward from the lower part, and an impact spring (8) is provided between the convex disc and the impact block (11). A connecting plate (26) is sleeved on the outer side of the end of the transmission plate (15). The connecting plate (26) is symmetrically provided with slots and protrusions, and a connecting buckle (20) is provided on the slot. A connecting column running through both sides is provided in the middle of the connecting buckle (20), and compression springs (19) are connected to both ends of the connecting column. A tension structure (251) is provided at a position corresponding to the connecting buckle (20) in the switching ring (25), and a visible locking hole (252) and a visible unlocking hole (253) are provided on the outer side of the switching ring (25) corresponding to the tension structure (251).

2. The detachable impact device for an electric tool according to claim 1, characterized in that: A first steel ball (10) is arranged between the impact spring (8) and the impact block (11), and a second steel ball (12) is arranged between the shaft portion of the transmission shaft (7) and the impact block (11).

3. The detachable impact device for an electric tool according to claim 1, characterized in that: A steel ball supporting gasket (9) is provided between the impact spring (8) and the first steel ball (10).

4. The detachable impact device for an electric tool according to claim 1, characterized in that: A first ball bearing (13) is arranged between the outer side of the convex disc and the hollow cavity, an internal gear (18) is arranged on one side of the first ball bearing (13), and a plurality of planetary gears (14) are meshedly arranged on the inner side of the internal gear (18).

5. The detachable impact device for an electric tool according to claim 4, characterized in that: The planetary gear (14) is fixed on the transmission plate (15) via a second PIN needle (16).

6. The detachable impact device for an electric tool according to claim 5, characterized in that: A second ball bearing (17) is sleeved on the middle part of the transmission plate (15).

7. The detachable impact device for an electric tool according to claim 5, characterized in that: A fixing sleeve (21) is sleeved on the outer side of the lower part of the transmission plate (15).

8. The detachable impact device for an electric tool according to claim 1, characterized in that: The connecting plate (26) is fixedly connected to the left gear box housing (1) and the right gear box housing (22) via a second screw (27).

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