CN218137828U

CN218137828U - Circulating lubrication structure based on design of piston assembly in hammer drill

Info

Publication number: CN218137828U
Application number: CN202222670991.7U
Authority: CN
Inventors: 陈兆庆; 尚才平
Original assignee: ZHEJIANG HANGBO POWER TOOLS CO Ltd
Current assignee: ZHEJIANG HANGBO POWER TOOLS CO Ltd
Priority date: 2022-10-11
Filing date: 2022-10-11
Publication date: 2022-12-27
Anticipated expiration: 2032-10-11

Abstract

The utility model discloses a circulating lubrication structure designed based on a piston assembly in a hammer drill, which comprises a shell, a bracket, a hammer rod assembly, a piston assembly, a transmission shaft, a drill bushing, a bearing and a drill bushing gasket; an inner front oil cavity and an outer front oil cavity are formed in the inner side and the outer side of the drill bush, and a middle oil cavity is formed between the transmission shaft and each part; the upper circumference of the outer circumference of the drill bushing gasket is uniformly provided with a plurality of drill bushing gasket oil through grooves, drill bushing oil through holes are formed in positions of the drill bushing corresponding to the bearings on the two sides and the end part of the piston assembly, an assembly circulation gap is formed between the piston assembly and the drill bushing, and the inner front oil cavity, the outer front oil cavity and the middle oil cavity form a communicated oil through path S1. In the utility model, the oil through groove of the drill bushing gasket and the oil through hole of the drill bushing are matched with the circulation clearance, and the impulse force conversion matched with the reciprocating motion of the piston assembly is provided for the circulation of the lubricating grease filled in the front and middle parts along the oil through path S1; lubricating grease can lubricate all moving parts, so that the lubricating effect is ensured, the energy consumption is reduced, the heat dissipation effect is improved, and the service life is prolonged.

Description

Circulating lubrication structure based on design of piston assembly in hammer drill

Technical Field

The utility model relates to a hammer drill technical field, concretely relates to circulating lubrication structure based on piston assembly design in the hammer drill.

Background

The hammer drill is a commonly used impact tool, an impact piston mechanism and a rotary drill bushing mechanism are arranged in the hammer drill, the impact piston mechanism is arranged in the rotary drill bushing mechanism, the two mechanisms carry out output work by an output shaft which is arranged at the rear part of a shell and is in transmission connection with a driving motor, a crankshaft eccentric pin component on the output shaft drives the impact piston mechanism to do reciprocating motion, and a rotary gear drives the rotary drill bushing mechanism to do rotary motion; therefore, during assembly, lubricating grease is coated and filled between the shell and each mechanism part, and during the use process of the hammer drill, the lubricating grease coated on the mechanism movable part is easy to cause thrust loss due to the rotation and reciprocating motion impact of the mechanism parts, so that the heat dissipation effect of the mechanism parts in the use process is reduced, the energy consumption is increased, and the service life is shortened.

Disclosure of Invention

The utility model aims at solving the problem that proposes in the above-mentioned background art, provide a circulating lubrication structure based on piston assembly design in the hammer drill.

In order to solve the technical problem, the technical scheme of the utility model is that: a circulating lubrication structure designed based on a piston assembly in a hammer drill comprises a shell, a support, a hammer rod assembly, the piston assembly, a transmission shaft and a drill bushing, wherein the drill bushing is positioned and installed through a bearing and the support, and a drill bushing gasket is arranged between the bearing and a rotating bushing gear assembly on the drill bushing; an inner front oil cavity and an outer front oil cavity are formed between the inner side and the outer side of the drill bush, the front end part of the piston assembly and the bearing respectively, and a middle oil cavity is formed between the transmission shaft and the shell, between the drill bush and between the transmission shaft and the support; a plurality of drill bushing gasket oil through grooves are uniformly formed in the upper circumference of the outer circumference of each drill bushing gasket, and the drill bushing gaskets are communicated with the outer front oil cavity and the middle oil cavity through the oil grooves; the drill bush is provided with drill bush oil through holes at positions corresponding to the bearings at two sides and the end part of the piston assembly, and the drill bush oil through holes are communicated with the outer front oil cavity and the inner front oil cavity; an assembly circulation gap is formed between the piston assembly and the drill bushing and is communicated with the middle oil cavity and the inner front oil cavity; the inner front oil cavity, the outer front oil cavity and the middle oil cavity form a communicated oil passage S1, and the piston assembly reciprocates to provide power for enabling lubricating grease in the inner front oil cavity, the outer front oil cavity and the middle oil cavity to circulate along the oil passage S1.

In the above circular lubrication structure designed based on the piston assembly in the hammer drill, the bearing is a needle bearing, the circumference of the end part of the bearing sleeve, which is correspondingly abutted against the drill bush gasket, is uniformly provided with a plurality of bearing oil through grooves, and the bearing oil through grooves correspond to the drill bush oil through holes.

In the above circular lubrication structure designed based on the piston assembly in the hammer drill, the end part of the bearing sleeve correspondingly abuts against the oil through groove of the drill bushing gasket on the drill bushing gasket, and the thickness of the bearing sleeve is smaller than the depth of the oil through groove of the drill bushing gasket.

In the above circular lubrication structure designed based on the piston assembly in the hammer drill, a plurality of auxiliary support oil through holes are formed in the upper side of the support, and the auxiliary support oil through holes communicate the interior of the support with the middle oil cavity.

In the above circulating lubrication structure designed based on the piston assembly in the hammer drill, a bushing is arranged between the end parts of the drill bushing connected with the bracket, and an oil through gap is formed.

In the above circular lubrication structure designed based on the piston assembly in the hammer drill, the drill bushing gasket is abutted against the positioning gasket in the rotating bushing gear assembly, the positioning gasket is designed in a polygonal shape, and an oil passing space is formed between the positioning gasket and the shell.

The utility model has the advantages that:

the oil through groove of the drill bushing gasket and the oil through hole of the drill bushing are matched with the circulation gap, so that the front part and the middle part between the shell and the inner parts of the shell form a communicated oil through path S1, and the impulse conversion of the reciprocating motion of the piston assembly is provided for the lubricating grease filled in the front part and the middle part to circulate along the oil through path S1; therefore, lubricating grease can lubricate all moving parts, the sufficient lubricating effect is ensured, the energy consumption is reduced, the heat dissipation effect is improved, and the service life is prolonged.

Drawings

FIG. 1 is a cross-sectional view of the present invention;

FIG. 2 is a perspective view of a spacer of the present invention;

fig. 3 is a perspective view of the middle bearing of the present invention;

fig. 4 is a perspective view of the bracket of the present invention;

fig. 5 is a perspective view of the positioning pad of the present invention;

FIG. 6 is a cross-sectional view of the drill bushing shim and the bearing of the present invention after being engaged;

fig. 7 is a perspective view of the middle drill bushing of the present invention.

Detailed Description

In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution of the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention; in the description of the present invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

The invention will be further explained with reference to the drawings.

Referring to fig. 1 to 7, the utility model provides a circulating lubrication structure based on piston assembly design in hammer drill, which comprises a shell 1, a bracket 2, a hammer rod assembly 3, a piston assembly 4, a transmission shaft 5 and a drill bushing 6, wherein the bracket 2 is fixedly connected with the shell 1, the piston assembly 4 and the hammer rod assembly 3 are arranged in the drill bushing 6, the drill bushing 6 is positioned and installed through a bearing 7 and the bracket 2, and a drill bushing gasket 9 is arranged between the bearing 7 and a rotating bushing gear assembly 8 on the drill bushing 6; two ends of a transmission shaft 5 are respectively connected with the shell 1 and the bracket 2, and are respectively in transmission connection with the drill bushing 6 and the hammer lever component 3 through a rotating sleeve gear component 8 and a swing rod bearing shaft 10; as can be seen from fig. 1, an oil seal 6-1 is arranged between the front end part of the drill bushing 6 and the housing 1, the rear end part of the bracket 2 is in sealing connection with the housing 1, and a plurality of sealing structures are arranged between the piston assembly 4 and the part connection of the hammer rod assembly 3, so that the housing 1 and the internal part parts coated with the lubricating grease are prevented from leaking, and the parts in the housing 1 and the connection sealing are the prior art and are not described in detail herein.

An inner front oil cavity 11 and an outer front oil cavity 12 are formed between the inner side and the outer side of the drill bush 6, the front end part of the piston assembly 4 and the bearing 7 respectively, and a middle oil cavity 13 is formed between the transmission shaft 5 and the shell 1, between the drill bush 6 and between the transmission shaft 5 and the bracket 2; a plurality of drill bushing gasket through oil grooves 14 are uniformly formed in the upper circumference of the outer circumference of the drill bushing gasket 9, and the drill bushing gasket through oil grooves 14 are communicated with an outer front oil cavity 12 and a middle oil cavity 13; the drill bushing oil through hole 15 is formed in the drill bushing 6, the position corresponding to the end portions of the bearings 7 on the two sides and the piston assembly 4, and the drill bushing oil through hole 15 is communicated with the outer front oil cavity 12 and the inner front oil cavity 11; an assembly flow gap 16 is formed between the piston assembly 4 and the drill sleeve 6, and the assembly flow gap 16 is communicated with the middle oil cavity 13 and the inner front oil cavity 11.

The inner front oil chamber 11, the outer front oil chamber 12 and the middle oil chamber 13 form a communicated oil passage S1, and the piston assembly 4 reciprocates to provide power for circulating lubricating grease in the inner front oil chamber 11, the outer front oil chamber 12 and the middle oil chamber 13 along the oil passage S1; in the in-process that the hammer drill used, the impact force that 4 reciprocating motion of piston assembly produced, can make the lubricating grease of coating packing between inside and each part of casing along logical oily route S1, circulate to lubricate through each part, fully guarantee the lubrication action, reduce the power consumption, improve the radiating effect, increase of service life.

Further, in order to better ensure the circulation of the lubricating grease, the bearing 7 is a needle bearing, a plurality of bearing oil through grooves 22 are uniformly formed in the circumference of the end part of the bearing sleeve 21, which is correspondingly abutted against the drill bush gasket 9, and the bearing oil through grooves 22 correspond to the drill bush oil through holes 15; and the end part of the bearing sleeve 21 is correspondingly abutted against the drill bushing gasket oil through groove 14 on the drill bushing gasket 9, and the thickness of the bearing sleeve 21 is smaller than the depth of the drill bushing gasket oil through groove 14.

Further, a plurality of sub-bracket oil through holes 23 are formed in an upper side of the bracket 2, and the sub-bracket oil through holes 23 communicate between the inside of the bracket 2 and the middle oil chamber 13, so that the lubricating grease can flow and lubricate between the inside of the bracket 2 and the middle oil chamber 13.

Furthermore, a bushing 24 is arranged between the end part of the drill bushing 6 connected with the bracket 2, and an oil through gap 25 is formed, the drill bushing gasket 9 abuts against a positioning gasket 26 in the rotary sleeve gear assembly 8, and the positioning gasket 26 is designed in a polygonal shape and forms an oil through space with the shell 1; so that the grease is lubricated at the contact of the drill bushing 6 with the parts.

The above detailed description is made on the circulating lubrication structure designed based on the piston assembly in the hammer drill, and the specific examples are applied herein to explain the principle and the implementation of the present invention, and the description of the above embodiments is only used to help understand the technical solution disclosed by the present invention; meanwhile, for the general technical users in the field, according to the idea of the present invention, there are changes on the specific implementation and application scope, and to sum up, the content of the present specification should not be understood as the limitation of the present invention.

Claims

1. A circulating lubrication structure based on piston assembly design in a hammer drill comprises a shell (1), a support (2), a hammer rod assembly (3), a piston assembly (4), a transmission shaft (5) and a drill bushing (6), wherein the drill bushing (6) is positioned and installed through a bearing (7) and the support (2), and a drill bushing gasket (9) is arranged between the bearing (7) and a rotary bushing gear assembly (8) on the drill bushing (6); the method is characterized in that: an inner front oil cavity (11) and an outer front oil cavity (12) are respectively formed between the inner side and the outer side of the drill bushing (6) and the front end part of the piston assembly (4) and between the inner side and the outer side of the drill bushing (6) and the bearing (7), and a middle oil cavity (13) is formed between the transmission shaft (5) and the shell (1), between the drill bushing (6) and between the transmission shaft and the support (2); a plurality of drill bushing gasket through oil grooves (14) are uniformly formed in the upper circumference of the outer circumference of the drill bushing gasket (9), and the drill bushing gasket through oil grooves (14) are communicated with an outer front oil cavity (12) and a middle oil cavity (13); the drill bush oil through hole (15) is formed in the drill bush (6) corresponding to the end portions of the bearings (7) on the two sides and the piston assembly (4), and the drill bush oil through hole (15) is communicated with the outer front oil cavity (12) and the inner front oil cavity (11); an assembly circulation gap (16) is formed between the piston assembly (4) and the drill bushing (6), and the assembly circulation gap (16) is communicated with the middle oil cavity (13) and the inner front oil cavity (11); the inner front oil chamber (11), the outer front oil chamber (12) and the middle oil chamber (13) form a communicated oil passing path S1, and the piston assembly (4) reciprocates to provide power for enabling lubricating grease in the inner front oil chamber (11), the outer front oil chamber (12) and the middle oil chamber (13) to circulate along the oil passing path S1.

2. The circulating lubrication structure designed based on the piston assembly in the hammer drill according to claim 1, wherein: the bearing (7) is a needle bearing, a plurality of bearing oil through grooves (22) are uniformly formed in the circumference of the end portion, corresponding to the drill bush gasket (9), of the bearing bush (21) in a propping mode, and the bearing oil through grooves (22) correspond to the drill bush oil through holes (15).

3. The circulating lubrication structure designed based on the piston assembly in the hammer drill according to claim 2, wherein: the end part of the bearing sleeve (21) is correspondingly abutted against the oil through groove (14) of the drill bushing gasket on the drill bushing gasket (9), and the thickness of the bearing sleeve (21) is smaller than the depth of the oil through groove (14) of the drill bushing gasket.

4. The circulating lubrication structure designed based on the piston assembly in the hammer drill according to claim 1, wherein: a plurality of auxiliary support oil through holes (23) are formed in the upper side position of the support (2), and the auxiliary support oil through holes (23) are communicated with the inner portion of the support (2) and the middle oil cavity (13).

5. The circulating lubrication structure designed based on the piston assembly in the hammer drill according to claim 1, wherein: and a bushing (24) is arranged between the end parts of the drill bushing (6) connected with the bracket (2) and forms an oil through gap (25).

6. The circulating lubrication structure designed based on the piston assembly in the hammer drill according to claim 1, wherein: the drill bushing gasket (9) abuts against a positioning gasket (26) in the rotary bushing gear assembly (8), and the positioning gasket (26) is designed in a polygonal shape and forms an oil through space with the shell (1).