CN-224222792-U - Adjustable impact structure for electric tool

CN224222792UCN 224222792 UCN224222792 UCN 224222792UCN-224222792-U

Abstract

The utility model provides an adjustable impact structure for an electric tool, which comprises an output shaft, wherein an impact assembly and an adjusting assembly are cooperatively arranged on the output shaft, the impact assembly comprises a first cam sleeved on the output shaft, a second cam, a low-speed gear, a clutch cam and a high-speed gear, the clutch cam is controlled by a gear shifting assembly to be connected with the low-speed gear or the high-speed gear, the adjusting assembly comprises a first fixed ring, a second fixed ring and a third fixed ring which are sequentially sleeved on the output shaft, one end of the second fixed ring is sleeved in the first fixed ring, the third fixed ring is elastically connected on the output shaft, a spring is arranged between the third fixed ring and the second fixed ring, a clamping groove is formed in a side surface of the third fixed ring facing the second fixed ring at intervals, a clamping block is correspondingly arranged on the second fixed ring, and a knob is sleeved on the outer wall of the third fixed ring. According to the utility model, through the matching design of the adjusting component and the impact component, the impact rotation or only rotation working mode can be accurately and flexibly carried out.

Inventors

LI MEILONG
LI MING
SHI ZHANYU

Assignees

浙江省永康市金都工贸有限公司

Dates

Publication Date: 20260512
Application Date: 20250429

Claims (4)

1. The utility model provides an adjustable impact structure for electric tool, includes the output shaft, and the output shaft wears to establish on electric tool's gear box casing, its characterized in that, the cooperation is provided with impact module and adjusting part on the output shaft, and impact module is located gear box casing inboard, and adjusting part is located gear box casing outside, impact module includes the first cam of cover on the output shaft, second cam, low-speed gear, clutch cam and high-speed gear, first cam cup joints on the output shaft, the movable cover of second cam is on the output shaft, and the second cam is fixed in on the gear box casing, a side of second cam forms the impact interval with first cam, clutch cam overlaps on the output shaft through the driving medium, low-speed gear and high-speed gear are located the both ends of rotating the piece respectively, and control clutch cam and low-speed gear or high-speed gear through the gearshift assembly and be connected, adjusting part is including the first solid fixed ring of cover on the output shaft in proper order, second solid fixed ring and third solid fixed ring, first solid fixed ring is connected with gear box casing, the one end cover of second solid fixed ring is at first solid fixed ring, the solid fixed ring of second cam, third solid fixed ring is connected with the solid fixed ring of spring face-phase, the second solid fixed ring of second solid fixed ring has the fixed ring of second and high-speed gear, high-speed gear is connected with the fixed ring, the fixed side has the fixed side of fixed gear, the fixed side of fixed connection, the fixed side has the fixed side of fixed clip, the fixed clip is set up.
2. The adjustable impact structure for the electric tool of claim 1, wherein the first cam is sleeved on the output shaft through a first spline housing, the second cam is provided with a connecting groove for sleeving a low-speed gear, three connectors are formed on the outer wall of the second cam in an extending mode, the three connectors are respectively connected to the gear box shell through bolts, the clutch cam is sleeved on the output shaft through a second spline housing, a roller path is arranged on the second spline housing, and steel balls rolling on the roller path are elastically arranged on the clutch cam at intervals.
3. The adjustable impact structure for the electric tool of claim 2, wherein connecting seats are symmetrically arranged at two ends of the clutch cam, steel balls rolling on the roller paths are elastically arranged on one connecting seat at intervals, connecting grooves with the same structure are formed in one surface of the low-speed gear and one surface of the high-speed gear, which face the clutch cam, and the connecting seats and the connecting grooves are matched and clamped.
4. The adjustable impact structure for the electric tool of claim 1, wherein the inner ring of the second fixing ring is provided with sliding grooves at intervals, steel balls are arranged on the output shaft corresponding to the sliding grooves, grooves are arranged on the inner ring of the third fixing ring at intervals, and steel balls connected through elastic pieces are arranged on the output shaft corresponding to the grooves.

Description

Adjustable impact structure for electric tool Technical Field The utility model relates to the technical field of electric tools, in particular to an adjustable impact structure for an electric tool. Background The electric tool is a hand-held or movable mechanical tool which uses a motor to drive a working head through a transmission mechanism. Compared with the traditional manual tool, the manual tool has the advantages of labor saving and high efficiency. The electric tools are various, different electric tools can be selected according to different use scenes and functions, a percussion drill is a currently used electric tool, a driving mechanism is added on the basis of a common electric drill, and a drill bit can be hit in a reciprocating mode through the combination of structures such as balls and gears so as to facilitate drilling on a hard object. The drive mechanism of a percussion drill is typically such that two percussion gears interact to achieve a high frequency of back and forth strokes. For example, patent publication number CN222359316U discloses a bit stabilizing structure of a percussion drill and a percussion drill, wherein the bit stabilizing structure includes a percussion drill, the percussion drill includes a rotating shaft, a clamping member, a bearing and a shock-absorbing ring, the shock-absorbing ring and the bearing are respectively sleeved on the rotating shaft, the rotating shaft is connected with an external motor, the shock-absorbing ring and the bearing are respectively connected with an external percussion drill housing, and the clamping member is arranged at an end of the rotating shaft. The impact drill unloads a part of rotating shaft vibration force through the damping ring, so that the influence of the shaking of the rotating shaft on the bearing is reduced. Meanwhile, in order to improve the versatility of the conventional impact drill, the impact drill has two working modes of impact rotation and only rotation by arranging a spring between the second impact member and the first impact member, specifically, when the clamping part 12 is compressed towards the inside of the shell 2, the second impact member 16 and the first impact member 15 are contacted against the elastic force of the spring 18, then when the second impact member 16 rotates along with the rotating shaft 11, the impact can be performed while the impact is performed, and when the pressure applied to the clamping part 12 does not completely overcome the elastic force, the second impact member 16 and the first impact member 15 are contacted, and at the moment, the rotating shaft 11 only rotates. Obviously, the above-mentioned working mode of percussion drill switches, does not have specific accurate regulation structure, but changes through the pressure that clamping part 12 received during operation, obviously has uncertainty like this, uncontrolled problem, can't accurately adjust to suitable working mode, carries out corresponding operation, leads to electric tool's use unstable, moreover, directly set up the spring between second impact member and first impact member, has higher precision requirement to the assembly between two impact members and the spring, otherwise also can influence the stability of impact work, and the spring also is easy to wear, increases the maintenance dynamics. Disclosure of utility model The present utility model is directed to an adjustable impact structure for an electric tool, which solves the above-mentioned problems of the prior art. In order to solve the technical problems, the utility model is realized by the following technical scheme: The utility model provides an adjustable impact structure for electric tool, includes the output shaft, and the output shaft wears to establish on electric tool's gear box casing, the cooperation is provided with impact module and adjusting part on the output shaft, and impact module is located the gear box casing inboard, and adjusting part is located the gear box casing outside, impact module is including the first cam of cover on the output shaft, second cam, low-speed gear, clutch cam and high-speed gear, first cam cup joints on the output shaft, second cam movable sleeve is on the output shaft, and the second cam is fixed in on the gear box casing, a side of second cam forms the impact interval with first cam, the clutch cam overlaps on the output shaft through the driving medium, low-speed gear and high-speed gear are located the both ends of rotating the piece respectively, and control clutch cam and low-speed gear or high-speed gear through the gear connection of gear shifting unit, adjusting part is including the first solid fixed ring of cover on the output shaft in proper order, second solid fixed ring and third solid fixed ring, first solid fixed ring is connected with the gear box casing, the one end cover of second solid fixed ring is at first solid fixed ring, the output shaft movable sleeve is on the third solid fixe