CN212287502U

CN212287502U - Clutch structure and electric hammer with same

Info

Publication number: CN212287502U
Application number: CN202020264992.XU
Authority: CN
Inventors: 曾细杰
Original assignee: Fujian Huian Kynko Electrical Machinery Co ltd
Current assignee: Fujian Huian Kynko Electrical Machinery Co ltd
Priority date: 2020-03-06
Filing date: 2020-03-06
Publication date: 2021-01-05
Anticipated expiration: 2030-03-06

Abstract

The utility model provides a separation and reunion structure and have electric hammer of this structure, this separation and reunion structure, including output shaft and fixed cover, separation and reunion spring, support cover, input gear and adapter sleeve, the last perforation of having seted up of input gear, it has first steel ball to alternate in the perforation, the adapter sleeve transmission is connected on the output shaft, the driving groove has been seted up to the adapter sleeve. During normal use, realize the transmission connection between adapter sleeve and the input gear through first steel ball, touch the stereoplasm object and when unable rotation when the drill bit, first steel ball is deviate from the transmission groove of adapter sleeve under the resistance effect and is makeed input gear and adapter sleeve alternate segregation, disconnection transmission connects, and the transmission shaft still can drive piston assembly action this moment and realize hammering the function, and then make the drill bit can break away from the stereoplasm object, and need not to shut down the processing, and it is comparatively convenient to use, and not fragile electric hammer, can improve electric hammer convenient to use nature and life.

Description

Clutch structure and electric hammer with same

Technical Field

The utility model relates to an electric tool and local structure thereof, especially a separation and reunion structure and have electric hammer of this structure.

Background

The electric hammer is an electric tool with a hammering function on the basis of an electric drill and is mainly used for drilling holes in objects with relatively high hardness, such as concrete, floor slabs, brick walls and stone materials.

When the current electric hammer is realizing hammering simultaneously and this function of drilling, each spare part on its transmission path all is rigid connection usually, however, because the hardness of electric hammer drilling object is usually great relatively, consequently the drilling bit appears easily because touch comparatively hard object and the unable pivoted condition in drilling process, the action of hammering this moment also can stop simultaneously, and then lead to the electric hammer unable work, need to shut down the processing, it is more inconvenient to use, can damage the electric hammer even when serious, influence the life of electric hammer.

In view of the above, the applicant has made intensive studies to solve the above problems and has made the present invention.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a can improve electric hammer convenient to use nature and life's separation and reunion structure and have the electric hammer of this structure.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the utility model provides a separation and reunion structure, includes the output shaft and follows the axial of output shaft is established in proper order the fixed cover on the output shaft, separation and reunion spring, support cover, input gear and adapter sleeve, the draw-in groove has been seted up on the output shaft, it is in to push up to alternate in the draw-in groove fixed cover is kept away from the snap ring of separation and reunion spring one side, separation and reunion spring's one end is pushed up and is in fixed sheatheeing in, and the other end is pushed up and is in the support is sheatheeing in, the last perforation of having seted up of input gear, it has first steel ball to alternate in the perforation, fenestrate aperture is greater than the diameter of first steel ball just fenestrate length is less than the diameter of first steel ball, the adapter sleeve transmission is connected on the output shaft, the adapter.

As an improvement of the utility model, support the cover orientation one side of input gear seted up with support the annular of overlapping coaxial arrangement, first steel ball alternates in the annular.

As an improvement of the present invention, the support sleeve is kept away from one side of the input gear is provided with a positioning ring fitted with a clutch spring.

As an improvement of the utility model, it is a plurality of to perforate, each perforate with the axis of input gear is the even cloth in center, every it has one all to alternate in the perforation first steel ball, the quantity of drive groove with fenestrate quantity is the same, each the drive groove with the axis of adapter sleeve is the even cloth in center.

As an improvement of the utility model, logical groove has been seted up on the inside wall of adapter sleeve, the output shaft with the position department that leads to the groove correspondence sets up flutedly, it has alternate simultaneously to lead to the inslot second steel ball in the recess.

The utility model provides an electric hammer, including the motor, with the transmission shaft that motor drive connects, with piston assembly and the transmission that transmission shaft transmission is connected and is arranged perpendicularly are connected driven gear on the piston assembly still includes above-mentioned separation and reunion structure, the transmission is connected with on the transmission shaft with the drive gear of the input gear meshing of separation and reunion structure, the transmission be connected with on the output shaft of separation and reunion structure with driven gear meshing's drive gear.

As an improvement of the present invention, the transmission shaft is arranged in parallel with the output shaft.

As an improvement of the utility model, fixed connection or an organic whole be connected with on the transmission shaft with transmission shaft parallel arrangement's eccentric bar, the eccentric bar with piston assembly's piston rod rotates to be connected.

As an improvement of the utility model, the input gear with drive gear all is the helical gear, drive gear with driven gear all is bevel gear.

Adopt above-mentioned technical scheme, the utility model discloses following beneficial effect has:

1. through setting up first steel ball and separation and reunion spring, during normal use, realize the transmission connection between adapter sleeve and the input gear through first steel ball, touch the stereoplasm object and when unable the rotation when the drill bit, first steel ball is deviate from the drive groove of adapter sleeve under the resistance effect and is makeed input gear and adapter sleeve alternate segregation, the disconnection transmission is connected, and the transmission shaft still can drive piston assembly action this moment and realize the hammering function, and then make the drill bit can break away from the stereoplasm object, and need not to shut down the processing, high durability and convenient use, and not fragile electric hammer, can improve electric hammer convenience of use and life.

2. The support sleeve is provided with the annular groove to form a rolling track of the first steel ball, so that the working stability is improved.

Drawings

Fig. 1 is a schematic structural view of an electric hammer in an embodiment, in which parts such as a housing are omitted;

FIG. 2 is a sectional view of the clutch structure in the embodiment;

FIG. 3 is a schematic structural view of an output rod in the embodiment;

FIG. 4 is a schematic structural view of an input gear in the embodiment;

fig. 5 is a schematic structural diagram of the connecting sleeve in the embodiment;

fig. 6 is a schematic structural view of a support sleeve in the embodiment.

The designations in the figures correspond to the following:

10-a motor; 20-a drive shaft;

21-a transmission gear; 22-eccentric rod;

30-a piston assembly; 31-a driven gear;

50-a drill chuck assembly; 60-a clutch structure;

61-an output shaft; 62-fixing the sleeve;

63-a clutch spring; 64-a support sleeve;

65-input gear; 66-connecting sleeve;

67-a drive gear; 68-support bearings;

69-a positioning ring; 71-card slot;

73-perforation;

74-first steel ball; 75-through slots;

76-a groove; 77-a second steel ball;

78-a drive groove; 79-ring groove.

Detailed Description

The invention will be further described with reference to the accompanying drawings and specific embodiments.

The present embodiment provides an electric hammer, and the electric hammer is provided with a clutch structure therein, which can be used for other electric tools. As shown in fig. 1 to 6, the electric hammer according to the present embodiment includes a housing (not shown), a motor 10 located in the housing, a transmission shaft 20 in transmission connection with the motor 10, a piston assembly 30 in transmission connection with the transmission shaft 20 and vertically arranged, a driven gear 31 in transmission connection with the piston assembly 30, and a drill chuck assembly 50 connected with the piston assembly 30 and coaxially arranged, wherein a drill bit (not shown) is detachably connected to the drill chuck assembly 50. The specific transmission connection structure between the motor and the transmission shaft 20, the specific transmission connection structure between the transmission shaft 20 and the piston assembly 30, the specific connection structure between the drill chuck assembly 50 and the piston assembly 30, and the specific structure of the piston assembly 30 and the drill chuck assembly 50 are the same as those of the conventional electric hammer, are not important points of the embodiment, and are not described in detail herein.

The upper end of the transmission shaft 20 is fixedly connected or integrally connected with an eccentric rod 22 which is arranged in parallel with the transmission shaft 20, namely, the eccentric rod 22 is vertically arranged and is not in the same straight line with the transmission shaft 20, and when the transmission shaft 20 rotates, the eccentric rod 22 can rotate around the axis of the transmission shaft 20. The eccentric rod 22 is rotatably connected to the piston rod of the piston assembly 30, so as to form a crank connection structure, which converts the rotation of the transmission shaft 20 into a linear reciprocating motion of the piston assembly 30, and further drives the drill chuck assembly 50 to realize a hammering function. In addition, a transmission gear 21 is also connected to the transmission shaft 20 in a transmission manner through a pin-and-socket fit, the upper portion of the transmission gear 21 is meshed with an input gear 61 mentioned below, and the lower portion of the transmission gear 21 is meshed with a gear arranged on the power shaft of the motor 10, so as to realize the transmission connection between the transmission shaft 20 and the motor 10, that is, the thickness of the transmission gear 21 is greater than the sum of the thicknesses of the gear arranged on the power shaft of the motor 10 and the input gear 61, and preferably, the gear arranged on the power shaft of the motor 10, the input gear 61 and the transmission gear 21 are all helical gears.

The electric hammer provided by the embodiment further comprises a clutch structure 60, the clutch structure 60 comprises an output shaft 61 arranged in parallel with the transmission shaft 20, a fixing sleeve 62, a clutch spring 63, a supporting sleeve 64, an input gear 65 and a connecting sleeve 66, the fixing sleeve 62 is sequentially sleeved on the output shaft 61 along the axial direction of the output shaft 61 and is coaxially arranged with the output shaft 61, wherein the output shaft 61 is in transmission connection with a driving gear 67 meshed with the driven gear 31, specifically, the driving gear 67 is integrally connected to one end of the output shaft 61 and is located on one side, far away from the fixing sleeve 62, of the clutch spring 63, and preferably, the driving gear 67 and the driven gear 31 are both bevel. Furthermore, two support bearings 68 are provided between the output shaft 61 and the housing, whereby a rotational connection between the output shaft 61 and the housing is achieved, and the fixed sleeve 62, the clutch spring 63, the support sleeve 64, the input gear 65 and the connecting sleeve 66 are located between the two support bearings 68.

In order to ensure that the fixing sleeve 62 is disengaged from the output shaft 61 under the action of the clutch spring 63, in the embodiment, a clamping groove 71 is formed on the output shaft 61, and a clamping ring (not shown) abutting against one side of the fixing sleeve 62 away from the clutch spring 63 is inserted into the clamping groove 71.

The input gear 65 is provided with a through hole 73, a plurality of first steel balls 74 are inserted into the through hole 73, specifically, the through holes 73 are distributed uniformly around the axis of the input gear 65, each through hole 73 is inserted with one first steel ball 74, the aperture of each through hole 73 is larger than the diameter of the corresponding first steel ball 74, and the hole length (or depth) of each through hole 73 is smaller than the diameter of the corresponding first steel ball 74, so as to ensure that the first steel balls 74 can pass through the corresponding through hole 73.

The connecting sleeve 66 is connected to the output shaft 61 in a transmission manner, the specific transmission connection structure may be a conventional structure, for example, a pin is connected in a matching manner, preferably, in this embodiment, a through groove 75 is formed in the inner side wall of the connecting sleeve 66, the output shaft 61 is provided with a groove 76 at a position corresponding to the through groove 75, and a second steel ball 77 inserted into the groove 76 is inserted into the through groove 75, so that the assembly is facilitated. One side of the connecting sleeve 66 facing the input gear 65 is provided with transmission grooves 78 matched with the first steel balls 74, the transmission grooves 78 are arc-shaped grooves, the number of the transmission grooves 78 is the same as that of the through holes 73, each transmission groove 78 is uniformly distributed by taking the axis of the connecting sleeve 66 as the center, each specific transmission groove 78 is a part of the same circular ring, and the transmission grooves 78 are not communicated with each other. Furthermore, the inner race of the support bearing 68 relatively close to the connecting sleeve 66 abuts against the side of the connecting sleeve 66 remote from the input gear 65 to support the connecting sleeve 66 and ensure that the connecting sleeve 66 is pressed against the input gear 65.

The side of the support sleeve 64 facing the input gear 65 is opened with a ring groove 79 coaxially arranged with the support sleeve 64, and each first steel ball 74 is inserted into the ring groove 79. In addition, the side of the support sleeve 64 remote from the input gear 65 is provided with a positioning ring 69 which cooperates with the clutch spring 63 to facilitate positioning when the spring 63 is installed.

When the drill chuck assembly is normally used, the motor 10 drives the transmission shaft 20 to rotate to drive the piston assembly 30 to act to realize a hammering function, and simultaneously drives the driven gear 31 to rotate through the clutch structure 60 so as to drive the drill chuck assembly 50 to realize a drilling function, at the moment, power transmitted by the motor 10 is transmitted to the drill chuck assembly 50 sequentially through the transmission shaft 20, the transmission gear 21, the input gear 65, the first steel ball 74, the connecting sleeve 66, the second steel ball 77, the output shaft 61, the driving gear 67, the driven gear 31 and the piston assembly 30, and the first steel ball 74 is inserted into the annular groove 79 and the corresponding transmission groove 78; when the drill bit is clamped by touching a hard object and cannot rotate, the drill chuck component 50, the piston component 30, the driven gear 31, the driving gear 67, the output shaft 61 and the connecting sleeve 66 are sequentially prevented from rotating, the first steel balls 74 are separated from the transmission groove 78 under the action of the driving force of the motor 10, and in the process, the first steel balls 74 move downwards towards the supporting sleeve 64, so that the supporting sleeve 64 is pushed towards the fixing sleeve 62, and the clutch spring 63 is compressed, and at the moment, the motor 10 can still drive the piston component 30 to normally act to realize hammering action, so that the drill bit is conveniently separated from the clamped position; then, when the first steel ball 74 moves to a position corresponding to one of the transmission grooves 78, the clutch spring 63 resets, so that the first steel ball 74 penetrates into the transmission groove 78 again, transmission connection is achieved, and the drilling function is recovered.

The present invention has been described in detail with reference to the accompanying drawings, but the embodiments of the present invention are not limited to the above embodiments, and those skilled in the art can modify the present invention according to the prior art, such as changing the clutch spring 63 in the above embodiments into other elastic components such as elastic rubber, which all belong to the protection scope of the present invention.

Claims

1. The utility model provides a separation and reunion structure, its characterized in that includes the output shaft and follows the axial of output shaft is established in proper order the fixed cover on the output shaft, separation and reunion spring, support cover, input gear and adapter sleeve, the draw-in groove has been seted up on the output shaft, it is in to cross in the draw-in groove to support the top the fixed cover is kept away from the snap ring of separation and reunion spring one side, separation and reunion spring's one end is supported the top and is in on the fixed cover, and the other end is supported the top and is in on the support cover, the perforation has been seted up on the input gear, it has first steel ball to cross in the perforation, perforated aperture is greater than the diameter of first steel ball just perforated hole length is less than the diameter of first steel ball, the adapter sleeve transmission is connected on the output shaft, the adapter sleeve.

2. The clutch structure according to claim 1, wherein a ring groove is formed in a side of the support sleeve facing the input gear, the ring groove being coaxial with the support sleeve, and the first steel ball is inserted into the ring groove.

3. The clutched structure of claim 1, wherein a side of the support sleeve remote from the input gear is provided with a retaining ring that engages the clutch spring.

4. The clutch structure as claimed in claim 1, wherein the through holes are plural, each through hole is uniformly distributed around the axis of the input gear, one first steel ball is inserted into each through hole, the number of the transmission grooves is the same as that of the through holes, and each transmission groove is uniformly distributed around the axis of the connecting sleeve.

5. The clutch structure as claimed in claim 1, wherein a through groove is formed in an inner side wall of the connecting sleeve, a groove is formed in a position of the output shaft corresponding to the through groove, and second steel balls inserted into the through groove are inserted into the through groove at the same time.

6. An electric hammer, comprising a motor, a transmission shaft in transmission connection with the motor, a piston assembly which is in transmission connection with the transmission shaft and is vertically arranged, and a driven gear in transmission connection with the piston assembly, characterized by further comprising a clutch structure according to any one of claims 1-5, wherein the transmission shaft is in transmission connection with a transmission gear engaged with an input gear of the clutch structure, and an output shaft of the clutch structure is in transmission connection with a driving gear engaged with the driven gear.

7. The electric hammer of claim 6, wherein the drive shaft and the output shaft are arranged in parallel.

8. The electric hammer according to claim 6, wherein the transmission shaft is fixedly connected or integrally connected with an eccentric rod arranged in parallel with the transmission shaft, and the eccentric rod is rotatably connected with a piston rod of the piston assembly.

9. The electric hammer as set forth in claim 6, wherein the input gear and the transmission gear are both helical gears, and the driving gear and the driven gear are both bevel gears.