CN112824054B

CN112824054B - Electric pickaxe

Info

Publication number: CN112824054B
Application number: CN201911146168.2A
Authority: CN
Inventors: 陆巧男; 孙井龙; 朱伯元
Original assignee: Positec Technology China Co ltd Non Small Entity
Current assignee: Positec Technology China Co ltd Non Small Entity
Priority date: 2019-11-21
Filing date: 2019-11-21
Publication date: 2022-08-12
Anticipated expiration: 2039-11-21
Also published as: CN112824054A; WO2021098370A1

Abstract

The invention relates to an electric pick, comprising: the reduction box comprises a box body and a transmission mechanism arranged in the box body; the impact mechanism comprises a cylinder, a piston assembly driven by the transmission mechanism, a ram arranged in the cylinder and driven by the piston assembly to reciprocate, and a ram rod arranged in the cylinder and bearing impact of the ram, wherein the first end of the cylinder is connected and positioned in the box body, and the second end of the cylinder, which is opposite to the first end, is provided with an electric pick chuck; and the plastic shell is sleeved outside the cylinder. Above-mentioned electric pick, the cylinder is connected and is positioned the reducing gear box, and the cylinder obtains better location support on the one hand, and on the other hand adopts the scheme of the straight section of thick bamboo of metal, and plastic casing weight is lighter, has alleviateed complete machine weight greatly, makes the operation more nimble convenient.

Description

Electric pickaxe

Technical Field

The invention relates to an electric tool, in particular to an electric pick.

Background

The electric pick in the related art comprises a reduction gearbox, an air cylinder and a piston assembly matched with the air cylinder for use, wherein the air cylinder is firstly positioned in a metal straight cylinder, and then the metal straight cylinder is connected and positioned with the reduction gearbox. The inventor finds out in the process of implementing the technology that: the electric pick is heavy and is not flexible and convenient to operate.

Disclosure of Invention

Accordingly, there is a need for a lightweight electric pick that is more flexible and convenient to operate.

An electric pick comprising:

the motor provides power for the electric pick to work;

the reduction box comprises a box body and a transmission mechanism at least partially arranged in the box body, and the transmission mechanism transmits the power of the motor to the impact mechanism;

the impact mechanism comprises a cylinder, a piston assembly driven by the transmission mechanism, a ram arranged in the cylinder and driven by the piston assembly to reciprocate, and a ram rod arranged in the cylinder and used for bearing impact of the ram, wherein the first end of the cylinder is connected and positioned in the box body, and the second end, opposite to the first end, of the cylinder is provided with a pick chuck;

and the plastic shell is sleeved outside the cylinder.

Above-mentioned electric pick, cylinder are connected and are located the reducing gear box, and the cylinder sets up the plastic casing who plays thermal-insulated effect outward, so, on the one hand the cylinder obtains better location and supports, and on the other hand adopts the scheme of the straight section of thick bamboo of metal more, and plastic casing weight is lighter, has alleviateed complete machine weight greatly, makes the operation more nimble convenient.

In one embodiment, the first end of the cylinder comprises an embedded part embedded in the box body and an end part abutted against the outer wall of the box body in the axial direction of the cylinder, wherein the end part is fixedly connected with the box body.

In one embodiment, a plurality of first sealing rings sleeved on the embedding part are arranged between the embedding part and the inner wall of the box body, and a second sealing ring is arranged between the end part and the outer wall of the box body.

In one embodiment, the plastic housing comprises an inner cylinder and an outer cylinder, and a cavity is formed between the inner cylinder and the outer cylinder.

In one embodiment, the cavity has a dimension in a radial direction of the cylinder of 2mm to 8 mm.

In one embodiment, the inner wall of the inner cylinder is provided with a supporting part which is abutted against the outer wall of the air cylinder, the supporting part is provided with a groove, the electric pick chuck is connected with the air cylinder through a pin, the air cylinder is externally sleeved with a pressing sleeve accommodated in the groove, and the pressing sleeve is pressed on the pin.

In one embodiment, a third sealing ring is arranged between one end of the plastic shell and the box body, a fourth sealing ring is arranged between the plastic shell and the cylinder, and a grease port of the cylinder is located between the third sealing ring and the fourth sealing ring in the axial direction of the cylinder.

In one embodiment, the wall thickness of the cylinder is 3mm to 5 mm.

In one embodiment, the piston assembly includes a piston driven by the transmission mechanism to reciprocate, and an air cushion disposed within a cylinder between the piston and the ram.

In one embodiment, the transmission mechanism comprises a gearwheel driven by a motor to rotate, an eccentric wheel in transmission connection with the gearwheel, an eccentric pin arranged on the eccentric wheel, and a connecting rod connected with the eccentric pin, and the connecting rod is connected with the piston.

Drawings

Fig. 1 is a schematic cross-sectional view of an electric pick according to an embodiment of the present invention.

The relevant elements in the figures are numbered correspondingly as follows:

10. a reduction gearbox; 110. a box body; 121. a motor; 122. a bull gear; 123. an eccentric wheel; 124. an eccentric pin; 125. a connecting rod; 126. a piston pin; 20. a cylinder; 211. an insertion section; 212. an end portion; 213. a first seal ring; 214. a second seal ring; 215. a grease port; 310. a piston assembly; 311. a piston; 312. an air cushion; 320. a ram; 330. a ram; 40. a plastic housing; 410. an inner barrel; 412. a support portion; 420. an outer cylinder; 430. a cavity; 440. a rib plate; 50. an electric pick chuck; 510. a pin; 520. pressing the sleeve; 610. a third seal ring; 620. and a fourth seal ring.

Detailed Description

To facilitate an understanding of the invention, the invention will now be described more fully hereinafter with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

It should be noted that when a portion is referred to as being "secured to" another portion, it can be directly on the other portion or there can be an intervening portion. When a portion is said to be "connected" to another portion, it may be directly connected to the other portion or intervening portions may be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not represent the only embodiments.

In the description of the present invention, it is to be understood that the terms "length," "width," "thickness," "height," "depth," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing and simplifying the description, and are not intended to indicate or imply that the device or element being referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus should not be considered as limiting the invention.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

The following describes a preferred embodiment of the electric pick according to the embodiment of the present invention with reference to the accompanying drawings.

Referring to fig. 1, the electric pick according to an embodiment of the present invention includes a reduction box 10 and an impact mechanism, wherein the impact mechanism includes a cylinder 20 and an impact assembly connected to the reduction box 10; the electric pick further comprises a plastic housing 40 disposed outside the cylinder 20.

The reduction gearbox 10 includes a housing 110 and a drive mechanism at least partially disposed within the housing 10. Wherein, the box body 110 is formed by butt joint of a left half and a right half. The cylinder 20 has a first end and a second end opposite to each other in the axial direction, wherein the first end is connected and positioned in the box 110, the second end is an end of the cylinder 20 far away from the box 110, and the second end is provided with a pick chuck 50, wherein the pick chuck 50 is used for accommodating a working head.

The impact assembly is used for receiving power transmitted by the transmission mechanism to impact the striker 330 intermittently, so that the other end of the striker 330 impacts the working head mounted at the electric pick chuck 50 intermittently, and the reciprocating motion of the working head is realized, thereby realizing the hammering action. Specifically, the impact assembly includes a piston assembly 310 driven by a transmission mechanism, a ram 320 disposed in the cylinder 20 and driven by the piston assembly 310 to reciprocate, and a ram 330 disposed in the cylinder 20 and receiving an impact of the ram 320, and the ram 320 intermittently impacts the ram 330 as it reciprocates.

In one embodiment, the piston assembly 310 includes a piston 311 driven by a transmission mechanism to reciprocate, and an air cushion 312 disposed in the cylinder 20 and located between the piston 311 and the ram 320. The transmission mechanism comprises a large gear 122 driven by a motor 121 to rotate, an eccentric wheel 123 driven by the large gear 122 to rotate, an eccentric pin 124 arranged on the eccentric wheel 123, and a connecting rod 125 connected with the eccentric pin 124, wherein the connecting rod 125 is connected with a piston 311 through a piston pin 126. The motor 121 provides power for the electric pick to work, and the transmission mechanism transmits the power of the motor 121 to the impact mechanism.

Specifically, after the motor 121 is started, the large gear 122 is driven to rotate, and the large gear 122 drives the eccentric wheel 123 to rotate; the eccentric pin 124 provided on the eccentric wheel 123 rotates with the axis of the eccentric wheel 123 to move the connecting rod 125, and the connecting rod 125 in turn reciprocates the piston 311. The piston 311 compresses the air spring 312 while reciprocating in the cylinder 20, thereby transmitting the energy of the piston 311 to the ram through the air spring 312, so that the ram 320 reciprocates. The ram 320 intermittently impacts the ram 330 as it reciprocates. The ram 330 then impacts the working head, thereby outputting the energy of the whole machine.

A plastic housing 40 is provided around the cylinder 20. The plastic housing 4 is connected to the cylinder 20, and the plastic housing 40 serves as a heat insulator. One end of the plastic case 4 is connected to the case 110.

Compared with the prior art that the cylinder is positioned on the metal straight cylinder, the electric pick of the embodiment has the advantages that the cylinder 20 is directly positioned on the box body 110, so that the supporting strength of the cylinder 20 is ensured, the plastic shell 40 has the advantage of light weight, the electric pick has the characteristic of light weight, and the operation is more flexible and convenient.

A first end of the cylinder 20 is connected to and positioned in the housing 110. In a specific scheme, referring to fig. 1, the first end of the cylinder 20 comprises an embedded part 211 embedded in the box body 110, and an end part 212 abutted against the outer wall of the box body 110 in the axial direction of the cylinder 20, wherein the end part 212 is fixedly connected with the box body 110.

The insertion portion 211 is inserted into the case 110 to be supported by the case 110. Meanwhile, the end 212 may be fixedly coupled to the case 110 by a screw. In this manner, the cylinder 20 is securely connected and positioned to the case 110.

When the cylinder 20 is connected to the case 110, a plurality of first sealing rings 213 are provided between the fitting portion 211 and the inner wall of the case 110 so as to be fitted over the fitting portion 211, and a plurality of second sealing rings 214 are provided between the end portion 212 and the outer wall of the case 110. In this way, the sealability between the cylinder 20 and the case 110 is ensured.

In a specific embodiment, the insertion portion 211 is provided with two annular grooves (not numbered) along the axial direction of the cylinder 20, and each annular groove is sleeved with a first sealing ring 213. The end 212 has a groove (not numbered) on the surface opposite to the housing 110, and a second sealing ring 214 is embedded in the groove. The first and second seal rings 213 and 214 are both O-rings.

The plastic housing 40 serves as a thermal insulation. In some embodiments, the plastic housing 40 includes an inner barrel 410 and an outer barrel 420 with a cavity 430 formed between the inner barrel 410 and the outer barrel 420. The cavity 430 serves as insulation. Through verification, when the radial dimension of the cavity 430 along the cylinder is 2mm-8mm, the cavity 430 can achieve a good heat insulation effect, and meanwhile, the influence on the volume of the electric pick whole machine due to the overlarge diameter of the plastic shell 40 is avoided.

The inner cylinder 410 and the outer cylinder 420 are integrally coupled to each other. In a specific embodiment, one end of the inner cylinder 410 away from the box body 110 is in contact with and connected with the outer cylinder 410, one end of the inner cylinder 410 close to the box body 420 is connected with the outer cylinder 420 through a rib plate 440, and the rib plate 440 is annular and has an inner circumferential surface matched with an outer circumferential surface of the cylinder 20 so as to be sleeved on an outer wall of the cylinder 20.

One end of the inner cylinder 410, which is far away from the box body 110, is contacted with and connected with the outer cylinder 410 into a whole, so that the structural reliability between the inner cylinder 410 and the outer cylinder 420 is ensured.

In order to stably support the plastic housing 40 to the cylinder 20, an annular support portion 412 that abuts against an outer wall of the cylinder 20 is further projected on the inner cylinder 410. The support part 412 is preferably provided on the inner cylinder 410 near an end of the inner cylinder 410 remote from the case 110. In this way, the plastic housing 40 is supported by the cylinder 20 from both left and right ends, and can be connected to the cylinder 20 more stably.

The pick holder 50 is mounted to a second end of the cylinder 20, and in particular, the pick holder 50 is connected to the cylinder 20 by a pin 510. In order to prevent the pin 510 from falling off, in practice, an annular groove is formed in the support portion 110, and a pressing sleeve 520 for pressing the pin 510 is disposed in the annular groove.

In addition, the plastic housing 40 also functions to seal the cylinder 20 to prevent the grease in the cylinder 20 from leaking to the outside through the grease port 215. Specifically, as shown in fig. 1, a third sealing ring 610 is disposed between one end of the plastic housing 40 and the box body 110, a fourth sealing ring 620 is disposed between the plastic housing 40 and the cylinder 20, and the grease port 215 is disposed between the third sealing ring 610 and the fourth sealing ring 620 in the axial direction of the cylinder 20, so that a grease sealing structure of the cylinder 20 is constructed by the plastic housing 40.

In the traditional technology, in the working process of the electric pick, the striking rod can bear torque during reciprocating hammering movement, the torque can be transmitted to the cylinder and the metal straight cylinder, and the diameter range of the cylinder is generally 2mm-2.5 mm. In the embodiment of the present invention, a metal straight cylinder is omitted, and in order to improve the reliability of the cylinder 20, in a specific scheme, the wall thickness of the cylinder 20 is increased, and the wall thickness range of the specific cylinder 20 is 3mm to 5 mm. The strength of the cylinder 20 within the range of the wall thickness is improved, the cylinder can bear the output torque during working independently, and meanwhile, the weight increase caused by the increase of the wall thickness is smaller than that of a traditional metal straight cylinder, so that the strength of the cylinder 20 is guaranteed, the light weight of the electric pick is guaranteed, and the operation is flexible.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. An electric pick, characterized in that includes:

the motor provides power for the electric pick to work;

the impact mechanism comprises a cylinder, a piston assembly driven by the transmission mechanism, a hammer which is arranged in the cylinder and driven by the piston assembly to do reciprocating motion, and a ram which is arranged in the cylinder and bears the impact of the hammer, wherein the first end of the cylinder is connected and positioned in the box body, the second end, opposite to the first end, of the cylinder extends out of the box body and is provided with a pick chuck, the first end of the cylinder comprises an embedded part embedded in the box body and an end part which is abutted against the outer wall of the box body in the axial direction of the cylinder, and the end part is fixedly connected with the box body;

And the plastic shell is sleeved outside the cylinder.

2. The electric pick of claim 1, wherein said end portion is fixedly secured to said housing by screws.

3. The electric pick of claim 1, wherein a plurality of first seal rings are disposed between said insertion portion and an inner wall of said housing, said first seal rings being disposed around said insertion portion, and a second seal ring is disposed between said end portion and an outer wall of said housing.

4. An electric pick of claim 1, wherein said plastic housing includes an inner barrel and an outer barrel with a cavity formed therebetween.

5. An electric pick of claim 4, wherein said cavity has a dimension in the radial direction of said cylinder of from 2mm to 8 mm.

6. The electric pick of claim 4, wherein the inner wall of said inner barrel has a support portion against the outer wall of the cylinder, said support portion having a recess formed therein, said pick holder being connected to said cylinder by a pin, said cylinder having a press sleeve received in said recess, said press sleeve being pressed against said pin.

7. An electric pick according to claim 3, wherein a third seal ring is disposed between one end of said plastic housing and said box, a fourth seal ring is disposed between said plastic housing and said cylinder, and a grease port of said cylinder is disposed between said third seal ring and said fourth seal ring in the axial direction of said cylinder.

8. An electric pick of claim 1, wherein said cylinder has a wall thickness of 3mm to 5 mm.

9. An electric pick according to claim 1, wherein said piston assembly includes a piston driven for reciprocal movement by said drive mechanism, an air cushion disposed within a cylinder between said piston and said ram.

10. An electric pick as claimed in claim 9, wherein the drive mechanism includes a gear wheel rotated by a motor, an eccentric wheel drivingly connected to the gear wheel, an eccentric pin disposed on the eccentric wheel, and a connecting rod connected to the eccentric pin, the connecting rod being connected to the piston.