CN210361177U - Electric hammer assembly - Google Patents

Electric hammer assembly Download PDF

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Publication number
CN210361177U
CN210361177U CN201920868300.XU CN201920868300U CN210361177U CN 210361177 U CN210361177 U CN 210361177U CN 201920868300 U CN201920868300 U CN 201920868300U CN 210361177 U CN210361177 U CN 210361177U
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CN
China
Prior art keywords
gear
clutch plate
transmission rod
transmission
assembly
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Active
Application number
CN201920868300.XU
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Chinese (zh)
Inventor
曾细杰
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fujian Huian Kynko Electrical Machinery Co ltd
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Fujian Huian Kynko Electrical Machinery Co ltd
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Application filed by Fujian Huian Kynko Electrical Machinery Co ltd filed Critical Fujian Huian Kynko Electrical Machinery Co ltd
Priority to CN201920868300.XU priority Critical patent/CN210361177U/en
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Publication of CN210361177U publication Critical patent/CN210361177U/en
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Abstract

The utility model provides an electric hammer assembly, including motor, first transfer line, second transfer line, intermediate gear, output gear, separation and reunion board, separation and reunion spring, support cover, piston assembly, drill chuck subassembly and, driven gear. Through setting up clutch plate and separation and reunion spring, output gear need just can be connected with the transmission of second transfer line through the clutch plate, when the drill bit touches the stereoplasm object and can't rotate, lug on the output gear is difficult to promote the clutch plate through the lateral wall of recess and rotates, be compelled to deviate from the recess, and extrude toward the separation and reunion spring direction with the clutch plate, make the transmission between output gear and the second transfer line disconnected, and first transfer line 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, it is comparatively convenient to use.

Description

Electric hammer assembly
Technical Field
The utility model relates to an electric tool, especially an electric hammer assembly.
Background
The electric hammer comprises a shell, an electric hammer assembly, a function switching device and other components, wherein the electric hammer assembly is a core component of the electric hammer, the hammering function along the axial direction of the drill bit can be realized, the drilling function can also be realized while hammering, and the function switching device of the electric hammer is used for controlling the realization of the two functions.
When the existing electric hammer assembly realizes the function of hammering and drilling simultaneously, all parts on a transmission path are rigidly connected, when a drill bit is in contact with a hard object and cannot rotate in the drilling process, hammering action can also be stopped simultaneously, so that the electric hammer cannot work, needs to be stopped for processing, and is inconvenient to use.
In view of the above, the applicant has made an intensive study on the structure of the electric hammer assembly, and has made this proposal.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a use comparatively convenient electric hammer assembly.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
an electric hammer assembly comprises a motor, a first transmission rod and a second transmission rod which are coaxially arranged with an output shaft of the motor respectively, an intermediate gear fixedly connected to the first transmission rod, an output gear, a clutch plate, a clutch spring and a support sleeve which are sequentially sleeved on the second transmission rod in a sliding manner from one end far away from the motor to the other end along the axial direction of the second transmission rod, a piston assembly vertically arranged with the first transmission rod, a drill chuck assembly coaxially arranged with the piston assembly and a driven gear which is connected to the piston assembly in a transmission manner, an input gear matched with the intermediate gear is integrally connected or fixedly connected to the output shaft of the motor, an eccentric rod which is parallelly arranged with the first transmission rod is fixedly connected or integrally connected to the first transmission rod, and the eccentric rod is rotationally connected with a piston rod of the piston assembly, fixedly connected or an organic whole be connected with on the second transfer line be used for with driven gear engaged driving gear, the output tooth with intermediate gear meshes, just output gear orientation one side of clutch plate is provided with a plurality of with output gear's axis is the even lug that distributes in center, the clutch plate with the transmission of second transfer line is connected, just the clutch plate orientation one side of output gear seted up a plurality of with lug complex recess, clutch spring's one end is supported the top on the clutch plate, the other end is supported the top on the support sleeve, the second transfer line is lieing in support the cover is kept away from one side of clutch spring still the joint have support the top support snap ring on the cover.
As an improvement of the present invention, the input gear the output gear and the intermediate gear are all bevel gears, the driving gear and the driven gear are all bevel gears.
As an improvement of the utility model, the border position of lug sets up and is convenient for follow the correspondence the first spigot surface of roll-off in the recess, the cell wall of recess be provided with first spigot surface complex second spigot surface.
As an improvement of the utility model, the lug is a conical block, and the recess is the bell jar.
As an improvement of the utility model, a waist-shaped hole has been seted up on the clutch plate, the second transfer line with the cross sectional shape of clutch plate complex position department with waist-shaped hole phase-match.
Adopt above-mentioned technical scheme, the utility model discloses following beneficial effect has:
1. through setting up clutch plate and separation and reunion spring, output gear need just can be connected with the transmission of second transfer line through the clutch plate, when the drill bit touches the stereoplasm object and can't rotate, lug on the output gear is difficult to promote the clutch plate through the lateral wall of recess and rotates, be compelled to deviate from the recess, and extrude toward the separation and reunion spring direction with the clutch plate, make the transmission between output gear and the second transfer line disconnected, and first transfer line 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, it is comparatively convenient to use.
2. The waist-shaped hole is formed in the clutch plate, and the cross section of the position where the second transmission rod is matched with the clutch plate is in the shape matched with the waist-shaped hole, so that the clutch plate can rotate relative to the second transmission rod while the second transmission rod and the clutch plate are mutually transmitted, the structure is simple, and the cost is relatively low.
Drawings
FIG. 1 is a schematic structural view of an electric hammer assembly according to an embodiment;
FIG. 2 is a sectional view of the electric hammer assembly in the embodiment;
FIG. 3 is a schematic structural view of a second transmission rod in the embodiment;
FIG. 4 is a schematic structural view of an output gear in the embodiment;
fig. 5 is a structural view of a clutch plate in the embodiment.
The designations in the figures correspond to the following:
10-a motor; 20-a first transfer lever;
21-intermediate gear; 22-eccentric rod;
30-a second transmission rod; 31-an output gear;
32-a clutch plate; 33-a clutch spring;
34-a support sleeve; 35-a gear mating section;
36-a clutch engagement section; 38-card slot;
39-a drive gear; 40-a piston assembly;
50-a drill chuck assembly; 61-a bump;
62-grooves; 63-a first guide surface;
64-second guide surface.
Detailed Description
The invention will be further described with reference to the accompanying drawings and specific embodiments.
As shown in fig. 1-2, the electric hammer assembly provided in this embodiment is located in a housing of an electric hammer, and the electric hammer assembly includes a motor 10, a first transmission rod 20 and a second transmission rod 30 coaxially arranged with an output shaft of the motor 10, respectively, an intermediate gear 21 fixedly connected to the first transmission rod 20, an output gear 31 slidably sleeved on the second transmission rod 30 along an axial direction of the second transmission rod 30 from one end far from the motor 10 to the other end, a clutch plate 32, a clutch spring 33 and a support sleeve 34, a piston assembly 40 vertically arranged with the first transmission rod 20, a drill chuck assembly 50 coaxially arranged with the piston assembly 40, and a driven gear (not shown in the figure) drivingly connected to the piston assembly 40, wherein the clutch plate 32 is drivingly connected to the second transmission rod 30, and the driven gear can slide relative to the movable assembly 40 under the action of a function switching device of the electric hammer, further, the engagement or disengagement with the driving gear 39, which will be mentioned later, is achieved, it should be noted that the function switching device and the electric hammer assembly of the present embodiment are included in a part of the electric hammer, that is, the function switching device is not included in a part of the electric hammer assembly of the present embodiment.
For convenience of description, in the present embodiment, the output shaft of the motor 10 is vertically arranged, in which case the first transmission rod 20 and the second transmission rod 30 are also vertically arranged, the piston assembly 40 is horizontally arranged above the second transmission rod 30, the piston assembly 40 is fixedly connected with the drill chuck assembly 50, and the drill chuck assembly 50 is detachably connected with a drill bit. It should be noted that the structures of the motor 10, the piston assembly 40 and the drill chuck assembly 50, as well as the specific connection structure between the piston assembly 40 and the drill chuck assembly 50 and the specific connection structure between the driven gear and the piston assembly 40 are the same as those in the conventional electric hammer assembly, and are not the focus of the embodiment, and will not be described in detail herein.
An input gear (not shown) engaged with the intermediate gear 21 is integrally connected or fixedly connected to an output shaft of the motor 10, and the input gear is engaged with the intermediate gear 21, so that the output shaft of the motor 10 is in transmission connection with the first transmission rod 20.
The intermediate gear 21 realizes the fixed connection of the first transmission rod 20 through a pin key matching mode, and the upper end of the first transmission rod 20 is fixedly connected or integrally connected with an eccentric rod 22 arranged in parallel with the first transmission rod 20, i.e. the eccentric rod 22 is vertically arranged and is not in the same straight line with the first transmission rod 20, when the first transmission rod 20 rotates, the eccentric rod 22 can rotate around the axis of the first transmission rod 20. The eccentric rod 22 is rotatably connected with the piston rod of the piston assembly 40, so as to form a crank connecting structure, and the rotation of the first transmission rod 20 is converted into the linear reciprocating motion of the piston assembly 40, so as to drive the drill chuck assembly to realize the hammering function.
As shown in fig. 1 to 3, the second transmission rod 30 includes a gear engaging section 35 engaged with the output gear 31 and a clutch engaging section 36 engaged with the clutch plate 32, a circular hole is formed in the middle of the output gear 31, and the cross section of the gear engaging section 35 is circular and adapted to the circular hole, so as to ensure that the output gear 31 can rotate and slide relative to the second transmission rod 30 while being sleeved on the second transmission rod 30; the clutch plate 32 is provided with a kidney-shaped hole, and the cross section of the second transmission rod 30 at the position (i.e. the clutch engagement section 36) engaged with the clutch plate 32 is matched with the kidney-shaped hole, i.e. the cross section is also kidney-shaped, so that the clutch plate 32 can rotate relative to the second transmission rod 30 while the mutual transmission of the clutch plate and the second transmission rod is ensured. One end of the clutch spring 33 abuts against the clutch plate 32, and the other end abuts against the support sleeve 34, so that the clutch plate 32 is pressed against the output gear 31, and meanwhile, in order to prevent the support sleeve 34 from sliding on the second transmission rod 30, a snap ring (not shown) abutting against the support sleeve 34 is further clamped on one side of the support sleeve 34 away from the clutch spring 33 of the second transmission rod 30, and of course, a clamping groove 38 matched with the snap ring needs to be formed in the second transmission rod 30. In addition, a driving gear 39 for engaging with the driven gear is fixedly connected or integrally connected to the second transmission rod 30, and since the second transmission rod 30 is vertically arranged and the axis of the driven gear, which is drivingly connected to the piston assembly 40 by a pin-key engagement, is horizontally arranged, the driving gear 39 and the driven gear are both bevel gears.
In order to avoid that the output gear 31 slides upwards without limit under the action of the clutch spring 33, so that the clutch plate 32 is difficult to press against the output gear 31, a limit structure is required to be arranged on the second transmission rod 30, the limit structure can be a snap ring limit structure mentioned above, or other conventional limit structures, preferably, in the embodiment, a bearing is arranged on the second transmission rod 30 at a position above the output gear 31, the bearing directly or indirectly abuts against the driving gear 39, and a convex ring abutting against an inner ring of the bearing is arranged on one side of the output gear 31 facing the bearing. Of course, if necessary, bearings may be mounted on the lower portion of the second transmission rod 30, the first transmission rod 20 and the output shaft of the motor 10, and these bearings may be mounted on the housing of the electric hammer in use.
As shown in fig. 4-5, a plurality of protrusions 61 are uniformly distributed around the axis of the output gear 31 on the side of the output gear 31 facing the clutch plate 32, and a plurality of grooves 62 are formed on the side of the clutch plate 32 facing the output gear 31 to match with the protrusions 61. As shown in fig. 1-5, when the hammer is used, after the hammer is switched to perform the drilling and hammering functions simultaneously, when the drill bit touches a hard object during the drilling process and cannot rotate, the protrusion 61 on the output gear 31 is difficult to push the clutch plate 32 to rotate through the sidewall of the groove 62, and is forced to be disengaged from the groove, and the clutch plate 32 is pressed toward the clutch spring 33, so that the transmission between the output gear 31 and the second transmission rod 30 is disconnected, the drill bit stops the drilling action, and at this time, the first transmission rod 20 can still drive the piston assembly 40 to perform the hammering function, and the drill bit can be disengaged from the hard object; then, under the elastic force of the clutch spring 33, the projection 61 penetrates into the groove 62 again, and the transmission connection between the output gear 31 and the second transmission rod 30 is connected, so that the drilling action can be continued.
In order to facilitate the protrusion 61 to be disengaged from the groove 62, two specific structures are provided in this embodiment, the first structure is as shown in fig. 4 and 5, a first guiding surface 63 for facilitating the protrusion 61 to be slid out from the corresponding groove 62 is provided at an edge position of the protrusion 61, and a second guiding surface 64 for being matched with the first guiding surface 63 is provided at a groove wall of the groove 62; of course, the first guiding surface 63 can also be arranged around the corresponding projection 61 and the second guiding surface 64 can also be arranged around the corresponding recess 62. In the second structure, the protrusion 61 is a tapered block, and the recess 62 is a tapered groove.
As shown in fig. 1 and 2, in the present embodiment, preferably, the input gear, the output gear 31 and the intermediate gear 21 are all helical gears, and the thickness of the intermediate gear 21 is greater than the sum of the thicknesses of the output gear 31 and the input gear, wherein the input gear is engaged with the lower portion of the intermediate gear 21, and the output gear 31 is engaged with the upper portion of the intermediate gear 21.
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 33 in the above embodiments to other elastic components such as elastic rubber, which all belong to the protection scope of the present invention.

Claims (5)

1. An electric hammer assembly comprises a motor and is characterized by further comprising a first transmission rod and a second transmission rod which are coaxially arranged with an output shaft of the motor respectively, an intermediate gear fixedly connected to the first transmission rod, an output gear, a clutch plate, a clutch spring, a support sleeve, a piston assembly vertically arranged with the first transmission rod, a drill chuck assembly coaxially arranged with the piston assembly and a driven gear in transmission connection with the piston assembly, wherein the output gear, the clutch plate, the clutch spring and the support sleeve are sequentially sleeved on the second transmission rod in a sliding manner from one end far away from the motor to the other end along the axial direction of the second transmission rod, the input gear matched with the intermediate gear is integrally connected or fixedly connected to the output shaft of the motor, an eccentric rod which is parallelly arranged with the first transmission rod is fixedly connected or integrally connected to the first transmission rod, and the eccentric rod is rotationally connected with a piston rod of the piston assembly, fixedly connected or an organic whole be connected with on the second transfer line be used for with driven gear engaged driving gear, the output tooth with intermediate gear meshes, just output gear orientation one side of clutch plate is provided with a plurality of with output gear's axis is the even lug that distributes in center, the clutch plate with the transmission of second transfer line is connected, just the clutch plate orientation one side of output gear seted up a plurality of with lug complex recess, clutch spring's one end is supported the top on the clutch plate, the other end is supported the top on the support sleeve, the second transfer line is lieing in support the cover is kept away from one side of clutch spring still the joint have support the top support snap ring on the cover.
2. The electric hammer assembly of claim 1, wherein the input gear, the output gear, and the intermediate gear are all helical gears, and the drive gear and the driven gear are all bevel gears.
3. The hammer assembly of claim 1, wherein the projections are positioned at an edge thereof with a first guide surface for sliding out of the corresponding recess, and wherein a wall of the recess is provided with a second guide surface for engaging the first guide surface.
4. The hammer assembly of claim 1, wherein the projection is a tapered block and the recess is a tapered slot.
5. The electric hammer assembly according to any one of claims 1 to 4, wherein the clutch plate has a kidney-shaped hole formed therein, and the second transmission lever has a cross-sectional shape matching the kidney-shaped hole at a position where the second transmission lever engages with the clutch plate.
CN201920868300.XU 2019-06-11 2019-06-11 Electric hammer assembly Active CN210361177U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201920868300.XU CN210361177U (en) 2019-06-11 2019-06-11 Electric hammer assembly

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201920868300.XU CN210361177U (en) 2019-06-11 2019-06-11 Electric hammer assembly

Publications (1)

Publication Number Publication Date
CN210361177U true CN210361177U (en) 2020-04-21

Family

ID=70264169

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201920868300.XU Active CN210361177U (en) 2019-06-11 2019-06-11 Electric hammer assembly

Country Status (1)

Country Link
CN (1) CN210361177U (en)

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