CN211306208U

CN211306208U - Electric hammer

Info

Publication number: CN211306208U
Application number: CN201921878260.3U
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: 2019-11-04
Filing date: 2019-11-04
Publication date: 2020-08-21
Anticipated expiration: 2029-11-04

Abstract

The utility model provides an electric hammer, including casing, transmission shaft, rocking bearing, piston assembly, drill chuck subassembly, output gear, input gear, clutch sliding block and operating means, operating means includes action bars, plectrum, compression spring, shifting pin and knob or smooth button, compression spring's one end is direct or indirect to support and is in on the casing, the other end supports the top on the plectrum, the shifting pin is located the plectrum is kept away from compression spring's one end, the annular has been seted up on the clutch sliding block, the plectrum alternates in the annular. Through connecting input gear drive on the transmission shaft to whether utilize the cooperation of thumb pin and plectrum or compression spring and plectrum to promote the separation and reunion slider and slide and control the action of whether the piston assembly participates in when using, very big less moving part and the quantity of elastic component in the function switching structure, simplified the function switching structure, the assembly is simple, the fault rate is low and the cost is lower relatively.

Description

Electric hammer

Technical Field

The utility model relates to a hand-held type electric tool, especially an electric hammer.

Background

The drill bit of electric hammer can also produce the reciprocating motion along drilling direction when the rotation, is equivalent to the complex body of electric drill and electric pick, consequently many electric hammers all make the electric hammer can realize electric drill, electric pick and three kinds of functions of electric hammer through setting up three function conversion equipment on the market at present, just realize that the drill bit only bores not the hammer, only hammer does not change and hammer drill three kinds of functions simultaneously.

For the electric hammer with relatively small specification or power, the function of the electric pick is basically not used due to insufficient force, however, the function switching structure of the electric hammer still adopts the traditional three-function switching device, which is called as a thinking formula in the field, but the three-function switching device is complicated due to the need of three gears, so that the assembly is difficult, the failure rate is high, and the cost is relatively high.

In view of the above, the applicant has made an intensive study on the structure of the electric hammer, and has made this proposal.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an electric hammer that the assembly is simple, the fault rate is low and the cost is lower relatively.

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

an electric hammer comprises a machine shell, a transmission shaft, a swinging bearing, a piston assembly, a drill chuck assembly, an output gear, an input gear, a clutch sliding block and an operation assembly, wherein the transmission shaft is rotatably connected in the machine shell, the swinging bearing is sleeved on the transmission shaft, the cylinder body is connected with a rocker of the swinging bearing, the drill chuck assembly is coaxially arranged with the piston assembly, the output gear is in transmission connection with the drill chuck assembly, the input gear is meshed with the output gear, the clutch sliding block is matched with the swinging bearing, and the operation assembly is used for controlling the clutch sliding block to move;

the operating assembly include with transmission shaft parallel arrangement's action bars, sliding connection be in plectrum, cover on the action bars are established compression spring on the action bars, with plectrum complex group round pin and be used for the drive the knob or the smooth button of group round pin, compression spring is located the plectrum is kept away from one side of rocking bearing, just compression spring's one end is directly or indirectly supported the top on the casing, the other end supports the top on the plectrum, the group round pin is located the plectrum is kept away from compression spring's one end, the annular has been seted up on the clutch slider, the plectrum alternates in the annular.

As an improvement of the utility model, the knob includes mutual fixed connection's piece and the interior piece that revolves outward, the swizzle fixed connection or rotate to be connected in revolve on the piece, just the swizzle with the center of rotation dislocation of the interior piece that revolves.

As an improvement of the utility model, the pinhole has been seted up on the interior piece of revolving, the one end of dialling the round pin alternates in the pinhole, just the dialling the round pin penetrates the position of pinhole is provided with the anticreep impressed watermark.

As an improvement of the utility model, set up on the casing with interior spiral piece complex perforate and with the coaxial counter bore of arranging of perforation, the counter bore is located the casing outside, just be provided with the shell fragment on the lateral wall of counter bore, the piece has to alternate outward in the counter bore bulge loop, the outer peripheral edges of bulge loop seted up a plurality ofly with shell fragment complex bullet groove.

As an improvement of the utility model, the internal rotation piece and the rubber ring is arranged between the through holes.

As an improvement of the present invention, the width of the input gear is larger than the width of the output gear.

As an improvement of the utility model, the cover is equipped with the stop collar on the action bars, the stop collar is located the plectrum is kept away from one side of compression spring.

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

1. through connecting input gear drive on the transmission shaft to whether utilize the cooperation of thumb pin and plectrum or compression spring and plectrum to promote the separation and reunion slider and slide and control the action of whether the piston assembly participates in when using, very big less moving part and the quantity of elastic component in the function switching structure, simplified the function switching structure, the assembly is simple, the fault rate is low and the cost is lower relatively.

2. Through setting up rubber circle or silica gel circle, be convenient for control the feeling of knob.

3. Due to the existence of the compression spring, the shifting pin only needs to drive the shifting piece to move towards the direction far away from the clutch sliding block, and the corresponding other direction is not limited, so that when the knob is used for driving the shifting pin, the knob can rotate clockwise or anticlockwise, and the operation is convenient.

4. The plectrum is driven to move towards different directions through the compression spring and the plectrum pin, so that the abrasion of the plectrum caused by the friction with the clutch sliding block is reduced.

Drawings

FIG. 1 is a schematic structural diagram of an electric hammer according to an embodiment;

FIG. 2 is a schematic structural view of an electric hammer according to an embodiment without a knob;

FIG. 3 is an exploded view of the rotary knob and the driver pin of the electric hammer according to the embodiment;

FIG. 4 is a schematic structural diagram of an electric hammer according to an embodiment without a knob and a part of a housing;

fig. 5 is a schematic structural diagram of a clutch slider of the electric hammer according to the embodiment.

The designations in the figures correspond to the following:

10-a housing; 11-perforating;

12-counter bore;

20-a drive shaft; 21-a transmission gear;

22-a wobble bearing; 23-a limit spring;

30-a piston assembly; 40-a drill chuck assembly;

41-output gear; 50-an input gear;

60-clutch slide block; 61-spline section;

62-a drive section; 63-ring groove;

70-an operating component; 71-a pronation member;

72-convex ring; 73-a pin;

74-a magazine; 75-a lever;

76-a plectrum; 77-compression spring;

78-pronation; 79-a stop collar;

80-spring plate.

Detailed Description

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

The first embodiment.

As shown in fig. 1 to 5, the electric hammer provided in this embodiment is a relatively small-sized or small-power electric hammer, which does not have a pick function, and specifically, the electric hammer includes a housing 10, a driving motor (not shown) disposed in the housing 10, a gear shaft (not shown) in transmission connection with the driving motor, a transmission shaft 20 rotatably connected in the housing, a transmission gear 21 fixedly or integrally connected to the transmission shaft 20, a rocking bearing 22 sleeved on the transmission shaft 20, a piston assembly 30 having a cylinder body connected to a rocking bar of the rocking bearing 22, a drill chuck assembly 40 coaxially arranged with the piston assembly 30, an output gear 41 in transmission connection with the drill chuck assembly 40, an input gear 50 engaged with the output gear 41, a clutch slider 60 engaged with the rocking bearing 22, and an operation assembly 70 for controlling the clutch slider 60, the housing 10 includes not only a housing, but also a supporting component located in the housing for connecting or supporting functional components such as a driving motor, which are conventional components and will not be described in detail herein.

The gear shaft and the output shaft of the driving motor are connected with each other through the coupler, and of course, the output shaft of the driving motor can also be connected to be the gear shaft, that is, the gear shaft and the output shaft of the driving motor are integrally connected. The transmission gear 21 is meshed with the gear shaft, and the gear part of the gear shaft and the teeth on the transmission gear 21 are helical teeth, so that the transmission is stable. In addition, the connection structures between the swing bearing 22 and the transmission shaft 20, between the swing bearing 22 and the piston assembly 30, between the piston assembly 30 and the drill chuck assembly 40, and between the drill chuck assembly 40 and the output gear 41 are the same as those of the conventional electric hammer, and the structures of the piston assembly 30 and the drill chuck assembly 40 are also the same as those of the conventional electric hammer, which are not important points of the embodiment and will not be described in detail here.

The input gear 50 is drivingly connected to the drive shaft 20, and the specific driving connection structure may be a conventional structure, such as a pin-key structure or a direct fixed connection between the two. In this embodiment, the mounting hole of the input gear 50 is a kidney-shaped hole, the cross-sectional shape of the position where the transmission shaft 20 is matched with the input gear 50 is matched with the kidney-shaped hole box, so as to transmit the power of the transmission shaft 20 to the input gear 50, meanwhile, in order to limit the axial movement of the input gear 50, a limit groove is formed at the position of the transmission shaft 20, which is located at one side of the input gear 50, which is far away from the rocking bearing 22, a limit snap ring (not shown in the figure) is sleeved in the limit groove, a limit spring 23 is sleeved on the transmission shaft 20, the limit spring 23 is located at one side of the input gear 50, which is far away from the limit groove, one end of the limit spring abuts against the input gear 50, and the other end of the limit spring directly abuts against. Like this accessible spacing snap ring and fiber spring 23 inject the position of input gear 50 on transmission shaft 20, compare with the structure of traditional through step axle restriction input gear 50 axial motion, wear set clutch slide 60 when the structure of this embodiment is convenient for assemble, and the installation is comparatively convenient, and transmission shaft 20's processing is also comparatively convenient. In addition, the above structure also helps to prevent axial play of the output gear 41 from being transmitted to the propeller shaft 20.

Preferably, the width of the input gear 50 is greater than the width of the output gear 41, which helps to avoid the output gear 41 from separating from the input gear 50 as the drill chuck assembly 40 reciprocates axially.

The clutch slider 60 is slidably connected to the transmission shaft 20 and is in transmission connection with the transmission shaft 20. Specifically, the clutch slider 60 is located between the input gear 50 and the rocking bearing 22, and the cross-sectional shape of the position where the transmission shaft 20 is matched with the rocking bearing 22 is circular, but the structure of the position where the transmission shaft 20 is matched with the clutch slider 60 is the same as the structure of the transmission shaft 20 matched with the input gear 41, that is, the transmission structure of the two is the same, and will not be described again here. The end of the rocking bearing 22 facing the clutch sliding block 60 is provided with a spline hole, the rocking bearing 22 with the spline hole can be directly purchased from the market, the clutch sliding block 60 comprises a spline part 61 matched with the spline hole and a driving part 62 matched with the operation assembly 70, and the spline part 61 and the driving part 62 are integrally connected. In addition, the driving portion 62 of the clutch slider 60 is formed with a ring groove 63, and the width of the ring groove 63 is larger than the thickness of a shift plate 76 to be mentioned below.

The operating assembly 70 includes an operating rod 75 disposed parallel to the transmission shaft 20, a dial 76 slidably connected to the operating rod 75, a compression spring 77 sleeved on the operating rod 75, a dial 73 engaged with the dial 46, and a knob for driving the dial 73, wherein the compression spring 77 is located on one side of the dial 76 away from the rocking bearing 22, one end of the compression spring 77 directly or indirectly abuts against the housing 10, the other end of the compression spring abuts against the dial 76, the dial 73 is located on one end of the dial 76 away from the compression spring 77, the dial 73 can abut against the dial 76, the dial 76 is inserted into the annular groove 63, and the dial 76 and the bottom surface of the annular groove 63 are not in contact with each other. In addition, a limiting sleeve 79 is sleeved on the operating rod 75, and the limiting sleeve 79 is positioned on one side of the shifting piece 76 away from the compression spring 77 and used for limiting the stroke of the shifting piece 76.

The knob includes the piece 71 and the interior piece 78 of spiraling that revolve through screw mutual fixed connection, wherein, the piece 71 of spiraling is located the outside of casing 10 for supply the user to operate, and interior piece 78 is located the inboard of casing 10, and its part passes casing 10 and the piece 71 fixed connection that revolves outward, like this, can drive interior piece 78 of spiraling and rotate together through the operation piece 71 of spiraling outward, of course, casing 10 need be seted up with interior piece 78 complex perforation 11. The pulling pin 73 is fixedly or rotatably connected to the inner rotating member 78, the pulling pin 73 is offset from the rotation center axis of the inner rotating member and parallel to the rotation center axis of the inner rotating member, i.e., they are not aligned with each other, and the pulling pin 73 is perpendicular to the center axis of the clutch slider 60 (i.e., the longitudinal direction of the transmission shaft 20).

Preferably, the internal rotation member 78 is provided with a pin hole, one end of the pulling pin 73 is inserted into the pin hole, and the part of the pulling pin 73 inserted into the pin hole is provided with an anti-falling embossing. In addition, a counter bore 12 is formed in the casing 10 and is coaxially arranged with the through hole 11, the counter bore 12 is located outside the casing 10, a spring plate 80 is arranged on a side wall of the counter bore 12, the outward-rotation member 71 has a convex ring 72 inserted into the counter bore, and a plurality of spring grooves 74 matched with the spring plate 80 are formed in the outer periphery of the convex ring 72. Thus, each time the outward-turning piece 71 adjusts a gear, the elastic sheet 80 will be inserted into the corresponding elastic groove 74 and generate sound to indicate the user that the outward-turning piece has turned to the right position. In addition, a rubber ring is arranged between the internal rotation piece 78 and the through hole 11 for adjusting the friction force between the two, thereby improving the rotating hand feeling of the knob.

In the using process, when the electric drill function is needed, the spline part 61 and the spline hole of the rocking bearing 22 are separated from each other by rotating the knob, in the process, the poking pin 73 can move around the rotating central shaft of the inner rotating piece 78 and pushes the poking piece 76 to move towards the direction of the compression spring 77, so that the compression spring 77 is compressed, and meanwhile, the poking piece 76 drives the clutch sliding block 60 to be separated from the rocking bearing 22; in the process of using the electric drill in a functional mode, the clutch sliding block 60 can still axially slide on the transmission shaft, so that the shifting piece 76 and the side wall of the annular groove 63 can be mutually bounced when being contacted, the wear caused by mutual friction of the shifting piece 76 and the side wall of the annular groove 63 is effectively avoided, and the service life is relatively long; when the electric hammer function needs to be used, the knob is rotated to enable the spline part 61 to penetrate into the spline hole of the rocking bearing 22, in the process, as the shifting pin 73 is separated from the shifting sheet 76, the shifting sheet 76 slides towards the direction of the rocking bearing 22 under the pushing of the elastic force of the return spring 77, and meanwhile, the spline part 61 of the clutch sliding block 60 is driven to penetrate into the spline hole of the rocking bearing 22 to realize connection; it should be noted that, when the return spring 77 completely returns to the initial state without pretightening force, the spline portion 61 of the clutch slider 60 does not completely penetrate the spline hole of the wobble bearing 22, so that, in the use process of the electric hammer function, the clutch slider 60 can still perform short-distance axial sliding on the transmission shaft, when the plectrum 76 touches the side wall of the ring groove 63, the plectrum 76 and the ring groove 63 can be elastically separated from each other, thereby effectively avoiding the wear caused by the mutual friction between the side walls of the plectrum 76 and the ring groove 63, and having a relatively long service life.

Example two.

The difference between the electric hammer provided in this embodiment and the first embodiment is that the sliding button is adopted in this embodiment instead of the knob in the first embodiment, specifically, the sliding button is slidably connected to the housing 10 (in this embodiment, the figures refer to fig. 4), and the sliding direction of the sliding button is the same as the length direction of the operating rod 75, and the toggle pin 73 is fixedly connected to the sliding button, so that the toggle pin 73 can be driven to move by the sliding button, of course, a locking structure for fixing the sliding button to the housing 10 needs to be further provided on the sliding button, and the specific locking structure is a conventional structure, such as a lock pin structure, and the like, and will not be described in detail herein.

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 make various modifications to the present invention according to the prior art, such as changing each spring in the above embodiments to other elastic components such as elastic rubber, which all belong to the protection scope of the present invention.

Claims

1. An electric hammer comprises a machine shell and is characterized by further comprising a transmission shaft, a swinging bearing, a piston assembly, a drill chuck assembly, an output gear, an input gear, a clutch sliding block and an operation assembly, wherein the transmission shaft is rotatably connected in the machine shell;

2. The electric hammer of claim 1, wherein the knob includes an external rotating member and an internal rotating member fixedly connected to each other, the pin is fixedly or rotatably connected to the internal rotating member, and the pin is disposed to be offset from a rotation center of the internal rotating member.

3. The electric hammer of claim 2, wherein the inner rotating member is provided with a pin hole, one end of the poking pin penetrates into the pin hole, and the part of the poking pin penetrating into the pin hole is provided with an anti-falling embossing.

4. The electric hammer according to claim 2, wherein the casing is provided with a through hole matched with the internal rotation member and a counter bore coaxially arranged with the through hole, the counter bore is located outside the casing, a spring plate is arranged on a side wall of the counter bore, the external rotation member is provided with a convex ring inserted in the counter bore, and the outer periphery of the convex ring is provided with a plurality of elastic grooves matched with the spring plate.

5. The hammer of claim 4, wherein a rubber ring is disposed between the inner rotary member and the aperture.

6. The hammer of any one of claims 1-5, wherein the input gear has a width greater than a width of the output gear.

7. The electric hammer according to any one of claims 1 to 5, wherein a stop collar is sleeved on the operating rod and is positioned on one side of the poking piece away from the compression spring.