CN212240890U - Concentric positioning structure for hammering set - Google Patents
Concentric positioning structure for hammering set Download PDFInfo
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- CN212240890U CN212240890U CN202020559108.5U CN202020559108U CN212240890U CN 212240890 U CN212240890 U CN 212240890U CN 202020559108 U CN202020559108 U CN 202020559108U CN 212240890 U CN212240890 U CN 212240890U
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Abstract
This scheme provides and beats group concentric location structure: the rotary seat is connected and driven by a rotor to rotate in a rotating direction and comprises a plurality of circumferential side walls and a pushing part, wherein the inner surface of each circumferential side wall is an arc surface and has the same circle center, and a guide groove is defined at the adjacent position of each circumferential side wall; the output shaft piece is arranged on the rotating seat in a relatively rotating way, and each impacted part is arranged in a radial protruding way; the pushing piece is sleeved on the output shaft piece in a co-rotating manner and comprises a pushed part facing the pushing part; the hammering piece is sleeved on the output shaft piece in a relative rotating manner and comprises a ring body accommodated between the peripheral side walls and hammering blocks arranged on the ring body, and each hammering block is movably arranged in a guide groove; an elastic piece which is positioned between the rotating seat and the output shaft piece and provides an elastic force for the pushing piece so that the pushing piece has a tendency of being far away from each impacted part; the pushing part intermittently pushes the pushed part to make the pushing piece axially move to push the hammering piece, so that each hammering block intermittently hammers each impacted part in the rotating direction.
Description
Technical Field
The utility model relates to a concentric positioning structure of a hammering group.
Background
In a conventional power tool, for example, a pneumatic impact tool, a hammering set is driven by a pneumatic motor to rotate, and the hammering set has a structure such as a hammering block that can generate intermittent impact force, so as to further generate rotational power with intermittent impact effect.
The main components of the hammering group include a hammering chamber, a hammering block, a force output shaft and the like, however, the inner circumferential wall of the hammering chamber does not extend along a circle, and the middle part of the hammering block does not have an annular body concentric with the inner circumferential wall of the hammering chamber. Therefore, the hammering chamber and the hammering block have no precise alignment, unstable rotation, poor rotation inertia, impact effect and poor output performance.
Therefore, there is a need to provide a new and improved concentric positioning structure for a hammering set to solve the above-mentioned problems.
SUMMERY OF THE UTILITY MODEL
The main object of the present invention is to provide a concentric positioning structure for hammering set, which is capable of precisely aligning and stabilizing rotation.
To achieve the above object, the present invention provides a concentric positioning structure for hammering set, including: the rotary seat is connected and driven by a rotor to rotate in a rotating direction and comprises a plurality of circumference side walls and a pushing part, wherein the inner surfaces of the plurality of circumference side walls are respectively provided with an arc surface and have the same circle center, and two adjacent circumference side walls of the plurality of circumference side walls define a guide groove; an output shaft member, which is relatively rotatably disposed on the rotary base and has a plurality of impacted portions protruding in a radial direction; a pushing piece which is sleeved on the output shaft piece in a rotating way and comprises a pushed part facing the pushing part; a hammering piece which is sleeved on the output shaft piece in a relatively rotating way and comprises a ring body contained between the plurality of peripheral side walls and a plurality of hammering blocks arranged on the ring body, wherein each hammering block is movably arranged in one guide groove; and an elastic member located between the rotary seat and the output shaft member and providing an elastic force to the pushing member to make the pushing member move away from the plural impacted portions; the pushing part can intermittently push the pushed part to make the pushing piece move axially to push the hammering piece, so that the plurality of hammering blocks intermittently hammer the plurality of impacted parts in the rotating direction.
Preferably, each of the impacted portions includes an impacted side, each of the hammering blocks includes an impacting side corresponding to the impacted side, and the impacted side and the impacting side extend in an arc shape and are in concave-convex fit.
Preferably, the hammering element includes a ring groove, and the pushing element includes a plurality of stages connected axially in sequence and decreasing in radial dimension, wherein one of the stages abuts against a bottom side of the ring groove.
Preferably, the rotary base further includes a key tooth hole for co-rotating connection with the rotor, and the output shaft member is completely located outside the key tooth hole.
Preferably, the output shaft member is integrally formed as a single member.
Preferably, the rotating base includes three equally angularly spaced peripheral side walls; the rotating base further comprises a ring surface which is connected to the bottom side of the plurality of circumferential side walls and extends inwards in the radial direction, and the ring body and the ring surface are coaxially arranged and are opposite to each other; each impacted part comprises an impacted side, each hammering block comprises an impacting side corresponding to the impacted side, and the impacted side and the impacting side extend in an arc shape and are in concave-convex fit; the two circumferentially opposite sides of each impacted part are respectively provided with an impacted side, the two circumferentially opposite sides of each hammering block are respectively provided with an impacting side, the impacted sides are convex in the circumferential direction, and the impacting sides are concave in the circumferential direction; each hammering block radially inwardly protrudes out of the guide groove; the output shaft member is integrally formed as a single member; the output shaft part also comprises a ring-shaped concave, and the elastic part is a ring-shaped spring and one end of the elastic part is accommodated in the ring-shaped concave.
Preferably, in the above-described aspect, the elastic member directly abuts against the hammering member, and the hammering member abuts against the pushing member all the time.
Preferably, the rotating base further includes a cylinder and a shaft sleeve disposed inside the cylinder, and the output shaft is pivotally inserted in the shaft sleeve.
Preferably, an annular groove is formed between the shaft sleeve and the cylinder, a pin shaft is further radially extended from the rotating base, the pin shaft penetrates through the abutting portion, the abutting portion is a rolling member rotatably sleeved on the pin shaft, and the rolling member is accommodated in the annular groove.
Preferably, the shaft sleeve is lower than the groove bottom side of each guide groove.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, a brief description will be given below of the drawings required to be used in the description of the embodiments or the prior art, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a perspective view of a preferred embodiment of the present invention.
Fig. 2 is an exploded view of a preferred embodiment of the present invention.
Fig. 3 is another exploded view of a preferred embodiment of the present invention.
Fig. 4 is a cross-sectional view of a preferred embodiment of the present invention.
Fig. 5 is another cross-sectional view of a preferred embodiment of the present invention.
Wherein, 1, the hammering group is a concentric positioning structure; 10, a rotating seat; 11, a peripheral sidewall; 12, a pushing part; 13, a guide groove; 14, an annulus; 15, a cylinder body; 16, a shaft sleeve; 17, a ring groove; 18, a pin shaft; 19 key tooth holes; 20, an output shaft member; 21, an impacted part; 22, the impacted side; 23, annular concave; 30, pushing the piece; 31, a pushed part; 32, stage; 40, hammering the workpiece; 41, a ring body; 42, hammering the block; 43, impact side; 44, a ring groove; and 50, an elastic part.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the drawings in the embodiments of the present invention are combined below to clearly and completely describe the technical solutions in the embodiments of the present invention, and obviously, the described embodiments are some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
The following description is given by way of example only, and not by way of limitation, of the scope of the invention.
Referring to fig. 1 to 5, which show a preferred embodiment of the present invention, a concentric positioning structure 1 of a hammering set of the present invention includes a rotary base 10, an output shaft 20, a pushing member 30, a hammering member 40 and an elastic member 50.
The rotary seat 10 is connected and driven by a rotor to rotate in a rotating direction, the rotor can be a part of a pneumatic, electric or other power tool, the rotary seat 10 comprises a plurality of circumferential side walls 11 and a pushing part 12, the inner surfaces of the circumferential side walls 11 are respectively arc surfaces and have the same circle center, and two adjacent circumferential side walls 11 define a guide groove 13; the output shaft 20 is relatively rotatably disposed on the rotary base 10, and the output shaft 20 is radially protruded with a plurality of impacted portions 21; the pushing element 30 is rotatably sleeved on the output shaft element 20 and includes a pushed portion 31 facing the pushing portion 12; the hammering piece 40 is relatively rotatably sleeved on the output shaft 20, the hammering piece 40 comprises a ring body 41 accommodated between the plurality of peripheral side walls 11 and a plurality of hammering blocks 42 arranged on the ring body 41, and each hammering block 42 is movably arranged in one of the guide grooves 13; the elastic member 50 is located between the rotary base 10 and the output shaft 20 and provides an elastic force to the pushing member 30, so that the pushing member 30 tends to move away from the plural impacted portions 21, thereby automatically returning to the original position; wherein, the pushing portion 12 can intermittently push the pushed portion 31 to make the pushing member 30 move axially to push the hammering member 40, so that the plural hammering blocks 42 intermittently hammers the plural impacted portions 21 in the rotating direction. By the inner surfaces of the plurality of peripheral side walls 11 being each an arc surface and having the same center, and the ring body 41 of the hammering piece 40 being accommodated between the plurality of peripheral side walls 11, accurate alignment and stable rotation can be achieved.
In detail, the rotary base 10 includes three equal angular distances between the peripheral walls 11, the rotary base 10 further includes a ring surface 14 connected to the bottom side of the plurality of peripheral walls 11 and extending radially inward, and the ring body 41 is disposed coaxially with and faces the ring surface 14. The rotary base 10 further includes a cylinder 15 and a shaft sleeve 16 disposed inside the cylinder 15, the output shaft 20 is pivotally inserted into the shaft sleeve 16, the shaft sleeve 16 is additionally attached to the cylinder 15, but may be integrally formed with the cylinder 15. An annular groove 17 is formed between the shaft sleeve 16 and the cylinder 15, a pin 18 is further radially extended from the rotary base 10, the pin 18 penetrates through the pushing portion 12, the pushing portion 12 is a rolling member rotatably sleeved on the pin 18, the pushed portion 31 is an inclined surface in the rotation direction, the friction resistance is small, the rolling member is accommodated in the annular groove 17, the radial displacement of the rolling member can be limited, and the structural strength and stability of the pushing portion 12 can be greatly improved. The boss 16 is lower than the bottom side of each guide groove 13, so that the overall axial dimension can be reduced while providing a space sufficient to accommodate the push member 30. The rotary base 10 further includes a key tooth hole 19 for co-rotating connection with the rotor, and the output shaft 20 is completely located outside the key tooth hole 19, for example, the rotor is inserted into the key tooth hole 19 through a tooth key, the depth of the tooth key inserted into the key tooth hole 19 is deep, the connection is stable and strong, and the tooth key does not contact and interfere with the output shaft 20.
Each impacted portion 21 includes at least one impacted side 22, each hammering block 42 includes at least one impacting side 43 corresponding to the at least one impacted side 22, and each impacted side 22 and each impacting side 43 extend in an arc shape and are in concave-convex fit. In the present embodiment, the two circumferentially opposite sides of each impacted portion 21 are respectively provided with one impacted side 22, and the two circumferentially opposite sides of each hammering block 42 are respectively provided with one impacting side 43, so as to provide forward and reverse impact actions; the impacted side 22 protrudes outward in the circumferential direction, and the impacted side 43 is recessed inward in the circumferential direction, so that an occlusion effect can be provided during impact, the impact is smooth, the slippage is not easy, the energy transfer efficiency is good, and the elements are not easy to damage.
The hammering member 40 further includes a ring groove 44, and the pushing member 30 includes a plurality of sequentially axially connected stages 32 (three stages in the present embodiment) with gradually decreasing radial dimensions, wherein one of the stages 32 is accommodated in the ring groove 44 and abuts against a bottom side of the ring groove 44, so that the stability of component matching is good.
Preferably, the output shaft 20 is integrally formed as a single component, has high structural strength, is relatively direct in force transmission, and is easy to manufacture, assemble, replace or maintain. However, the output shaft member may be assembled or assembled in multiple parts.
Preferably, the output shaft 20 further includes a ring recess 23, the elastic element 50 is a ring-shaped spring, and one end of the elastic element is accommodated in the ring recess 23, and the other end of the ring-shaped spring is sleeved on the other stage 32 of the pushing element 30, so that the element matching stability is good; the elastic member 50 directly abuts against the hammering member 40, the hammering member 40 abuts against the pushing member 30 in full time, so that the full time abutment of the abutting part 12 and the pushing member 30 is ensured without generating a gap therebetween, and the time when the hammering member 40 is pushed and the time when the plural hammering blocks 42 hammer the plural impacted parts 21 are more accurate without generating errors in movement; each of the hammering blocks 42 is protruded with one of the guiding grooves 13 radially inward, so that the rotational inertia, the structural strength and the impact area (high impact accuracy) can be increased.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.
Claims (10)
1. The utility model provides a hammering group concentric positioning structure which characterized in that includes:
the rotary seat is connected and driven by a rotor to rotate in a rotating direction and comprises a plurality of circumference side walls and a pushing part, wherein the inner surfaces of the plurality of circumference side walls are respectively provided with an arc surface and have the same circle center, and two adjacent circumference side walls of the plurality of circumference side walls define a guide groove;
an output shaft member, which is relatively rotatably disposed on the rotary base and has a plurality of impacted portions protruding in a radial direction;
a pushing piece which is sleeved on the output shaft piece in a rotating way and comprises a pushed part facing the pushing part;
a hammering piece which is sleeved on the output shaft piece in a relatively rotating way and comprises a ring body contained between the plurality of peripheral side walls and a plurality of hammering blocks arranged on the ring body, wherein each hammering block is movably arranged in one guide groove; and
an elastic member located between the rotary seat and the output shaft member and providing an elastic force to the pushing member to make the pushing member tend to be far away from the plural impacted parts;
the pushing part can intermittently push the pushed part to make the pushing piece move axially to push the hammering piece, so that the plurality of hammering blocks intermittently hammer the plurality of impacted parts in the rotating direction.
2. The concentric positioning structure of a hammering set according to claim 1, wherein each of the impacted portions includes an impacted side, each of the hammering blocks includes an impacting side corresponding to the impacted side, and the impacted side and the impacting side extend arcuately and are in concave-convex engagement.
3. The concentric positioning structure of a hammering set of claim 1, wherein the hammering member includes a ring groove, and the pushing member includes a plurality of stages connected axially in sequence and decreasing in radial dimension, wherein one of the stages abuts against a bottom side of the ring groove.
4. The concentric positioning structure for a hammering set according to claim 3 wherein the rotary base further comprises a key tooth hole for co-rotating connection with the rotor, the output shaft member being located completely outside the key tooth hole.
5. The hammerbank concentric positioning structure of claim 1, wherein the output shaft is integrally formed as a single piece.
6. The hammering set concentric positioning structure according to claim 4, wherein the rotating base comprises three equally angularly spaced peripheral side walls; the rotating base further comprises a ring surface which is connected to the bottom side of the plurality of circumferential side walls and extends inwards in the radial direction, and the ring body and the ring surface are coaxially arranged and are opposite to each other; each impacted part comprises an impacted side, each hammering block comprises an impacting side corresponding to the impacted side, and the impacted side and the impacting side extend in an arc shape and are in concave-convex fit; the two circumferentially opposite sides of each impacted part are respectively provided with an impacted side, the two circumferentially opposite sides of each hammering block are respectively provided with an impacting side, the impacted sides are convex in the circumferential direction, and the impacting sides are concave in the circumferential direction; each hammering block radially inwardly protrudes out of the guide groove; the output shaft member is integrally formed as a single member; the output shaft part also comprises a ring-shaped concave, and the elastic part is a ring-shaped spring and one end of the elastic part is accommodated in the ring-shaped concave.
7. The concentric positioning structure of a hammering set according to any one of claims 1 to 6, wherein the elastic member directly abuts against the hammering member, and the hammering member abuts against the pushing member all the time.
8. The structure of any one of claims 1 to 6, wherein the rotary base further comprises a cylinder and a sleeve disposed inside the cylinder, the output shaft being pivotally inserted in the sleeve.
9. The concentric positioning structure of a hammering set of claim 8, wherein an annular groove is formed between the shaft sleeve and the barrel, a pin shaft is further extended radially from the rotary base, the pin shaft penetrates through the abutting portion, the abutting portion is a rolling member rotatably sleeved on the pin shaft, and the rolling member is accommodated in the annular groove.
10. The hammering set concentric positioning structure of claim 8, wherein the bushing is lower than the bottom side of each of the guide grooves.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020559108.5U CN212240890U (en) | 2020-04-15 | 2020-04-15 | Concentric positioning structure for hammering set |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020559108.5U CN212240890U (en) | 2020-04-15 | 2020-04-15 | Concentric positioning structure for hammering set |
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| CN212240890U true CN212240890U (en) | 2020-12-29 |
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| CN202020559108.5U Active CN212240890U (en) | 2020-04-15 | 2020-04-15 | Concentric positioning structure for hammering set |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023107540A1 (en) * | 2021-12-07 | 2023-06-15 | Milwaukee Electric Tool Corporation | Impact tool with a multi-piece anvil assembly |
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2020
- 2020-04-15 CN CN202020559108.5U patent/CN212240890U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023107540A1 (en) * | 2021-12-07 | 2023-06-15 | Milwaukee Electric Tool Corporation | Impact tool with a multi-piece anvil assembly |
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