CN220970958U

CN220970958U - Pneumatic assembly and pneumatic grinder

Info

Publication number: CN220970958U
Application number: CN202322621356.4U
Authority: CN
Inventors: 吕礼立
Original assignee: Individual
Current assignee: Individual
Priority date: 2023-09-26
Filing date: 2023-09-26
Publication date: 2024-05-17
Anticipated expiration: 2033-09-26

Abstract

The utility model discloses a pneumatic component and a pneumatic grinder, wherein the pneumatic component comprises: the wind guiding device comprises a shell, a wind guiding piece, a wind wheel assembly and a transmission arm; the wind-guiding piece is arranged in the shell, the wind wheel assembly is arranged in the shell and movably connected with the shell, the upper ends of the two transmission arms are respectively connected with the two ends of the wind wheel assembly, the wind-guiding piece is used for connecting high-pressure air flow to drive the wind wheel assembly to rotate, and the wind wheel assembly drives the transmission arms to reciprocate up and down. According to the embodiment of the utility model, through the wind guide piece integrally formed with the rear shell and the accommodating cavity respectively integrally formed with the front shell and the rear shell, the connection between each part in the shell and the shell is firmer, the structural strength of the wind guide piece and the shell is improved, meanwhile, fewer parts are independently arranged in the shell, the installation space in the shell is saved, the shell is convenient to thicken, and the service life of the pneumatic tool is longer.

Description

Pneumatic assembly and pneumatic grinder

Technical Field

The utility model relates to the technical field of pneumatic tools, in particular to a pneumatic assembly and a pneumatic grinder.

Background

The small pneumatic tool is a tool which uses high-pressure air as a power medium, converts kinetic energy of the high-pressure air into mechanical energy through parts in the machine to output, drives a tool head to reciprocate, and processes workpieces, and common pneumatic tools comprise a pneumatic wrench, a pneumatic screwdriver, a pneumatic polisher, a pneumatic spray gun, a pneumatic shovel, a pneumatic hammer, a pneumatic saw, a pneumatic file and the like.

Some existing pneumatic tools, such as the Chinese patent of the utility model with the bulletin number of CN219402638U, disclose a pneumatic file, which comprises a flexible transmission shaft, a lower shell and an upper shell, wherein the flexible transmission shaft is positioned between the upper shell and the lower shell, the flexible transmission shaft is assembled and connected with the upper shell and the lower shell, an eccentric flywheel is arranged in the lower shell, two sides of the eccentric flywheel are fixedly connected with a rotating shaft, a large bearing is arranged on an eccentric shaft on the rotating shaft, a small bearing is arranged on the rotating shaft, an air blowing assembly is arranged in the upper shell and the lower shell, and an air inlet nozzle is arranged in the air blowing assembly.

However, because the pneumatic file vibrates greatly during working, the air guide assembly (comprising parts such as an air blowing assembly, an air inlet nozzle, an air flow guide cover and the like) in the shell cannot be kept stable and fixed with the shell for a long time, connection looseness, falling and even damage of each part are easily caused, and the product maintenance cost is high and the service life is short under the long-term vibration use scene.

Disclosure of utility model

In view of the above, the utility model provides a pneumatic assembly and a pneumatic grinder, which are used for solving the problems of unstable connection of an air guide assembly, higher product maintenance cost and shorter service life in the prior art.

To achieve one or some or all of the above or other objects, the present utility model provides: a pneumatic assembly, comprising: the wind guiding device comprises a shell, a wind guiding piece, a wind wheel assembly and a transmission arm;

The wind guide piece is arranged in the shell, the wind wheel assembly is arranged in the shell and is movably connected with the shell, the upper ends of the two transmission arms are respectively connected with the two ends of the wind wheel assembly, the wind guide piece is used for connecting high-pressure air flow to drive the wind wheel assembly to rotate, and the wind wheel assembly drives the transmission arms to reciprocate up and down;

The wind wheel assembly comprises an eccentric shaft, a wind wheel and two connecting rings, wherein the eccentric shaft is erected between the two transmission arms, the wind wheel and the connecting rings are respectively and fixedly connected to the eccentric shaft, and the two connecting rings are respectively and rotatably connected to two sides of the wind wheel;

The shell comprises a front shell and a rear shell, the front shell is connected with the rear shell cover in a covering way, the air guide piece and the inner wall of the rear shell are integrally formed, the air outlet end of the air guide piece is provided with a rear accommodating groove communicated with the air guide piece, the inner side of the front shell is correspondingly provided with a front accommodating groove, the rear accommodating groove is covered with the front accommodating groove to form an accommodating cavity, the wind wheel is arranged in the accommodating cavity, and the accommodating cavity is provided with an air hole communicated with the outside of the shell; the two side groove walls of the rear containing groove are respectively provided with a rear connecting groove, the two side groove walls of the front containing groove are correspondingly provided with a front connecting groove, the front connecting groove and the rear connecting groove are covered to form an annular groove, and the connecting ring is sleeved in the annular groove.

Preferably, the air inlet end of the air guide piece is located at the upper end of the shell, and the air outlet end of the air guide piece is located above the wind wheel.

Preferably, the air outlet direction of the air guide piece is tangential to the wind wheel.

Preferably, the air hole is located below the wind wheel.

Preferably, the opening of the air inlet end of the air guide piece is larger than the opening of the air outlet end of the air guide piece.

Preferably, the two transmission arms are combined to form a Y-shaped structure.

Preferably, the upper ends of the two actuating arms are respectively located at two sides of the accommodating cavity.

Preferably, the lower end of the transmission arm is connected with a chuck main shaft.

Preferably, the connecting ring is a rubber ring.

The utility model also provides a pneumatic grinder, which comprises the pneumatic assembly.

The implementation of the embodiment of the utility model has the following beneficial effects:

After the pneumatic assembly is adopted, through the wind guide piece arranged with the rear shell in an integrated manner and the accommodating cavity formed by the wind guide piece arranged with the front shell and the rear shell in an integrated manner respectively, the connection between each part in the shell and the shell is firmer, the structural strength of the wind guide piece and the shell is improved, simultaneously, fewer parts are independently arranged in the shell, the installation space in the shell is saved, the shell is convenient to thicken, and the service life of the pneumatic tool is longer.

Drawings

In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Wherein:

FIG. 1 is a schematic view of the overall structure of a pneumatic assembly according to the present utility model;

FIG. 2 is a schematic diagram of an exploded view of a pneumatic assembly according to the present utility model;

FIG. 3 is a schematic diagram of an exploded view of a pneumatic assembly according to the present utility model;

FIG. 4 is a schematic view of the internal structure of the pneumatic assembly according to the present utility model;

fig. 5 is a schematic cross-sectional view of a pneumatic assembly according to the present utility model.

Reference numerals: 10. a housing; 11. a front shell; 111. a front accommodating groove; 112. a front connecting groove; 12. a rear case; 121. a rear accommodation groove; 122. a rear connecting groove; 13. air holes; 20. an air guide member; 21. an air inlet end; 22. an air outlet end; 30. a wind wheel assembly; 31. an eccentric shaft; 32. a wind wheel; 33. a connecting ring; 40. a transmission arm; 41. a chuck main shaft.

Detailed Description

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 utility model belongs; the terminology used in the description of the applications herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model; the terms "comprising" and "having" and any variations thereof in the description of the utility model and the claims and the description of the drawings above are intended to cover a non-exclusive inclusion. The terms first, second and the like in the description and in the claims or in the above-described figures, are used for distinguishing between different objects and not necessarily for describing a sequential or chronological order.

Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the utility model. The appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those of skill in the art will explicitly and implicitly appreciate that the embodiments described herein may be combined with other embodiments.

In order to make the person skilled in the art better understand the solution of the present utility model, the technical solution of the embodiment of the present utility model will be clearly and completely described below with reference to the accompanying drawings.

As shown in fig. 1-5, embodiments provided for by the present utility model.

An embodiment of the present utility model provides a pneumatic assembly comprising: the wind-driven generator comprises a shell 10, a wind guide piece 20, a wind wheel assembly 30 and a driving arm 40, wherein the wind guide piece 20 is arranged in the shell 10, the wind wheel assembly 30 is arranged in the shell 10 and is movably connected with the shell 10, the two driving arms 40 are combined to form a Y-shaped structure, the upper ends of the two driving arms 40 are respectively connected with two ends of the wind wheel assembly 30, the lower ends of the driving arms 40 are used for being connected with a chuck main shaft, a cutter and the like, the wind guide piece 20 is used for connecting high-pressure air flow to drive the wind wheel assembly 30 to rotate, and the wind wheel assembly 30 drives the driving arms 40 to reciprocate up and down. Specifically, the wind wheel assembly 30 includes an eccentric shaft 31, a wind wheel 32 and two connecting rings 33, the eccentric shaft 31 is erected between the two driving arms 40, the wind wheel 32 and the connecting rings 33 are respectively connected to the eccentric shaft 31, the wind wheel 32 is fixedly connected with the eccentric shaft 31, the wind wheel 32 rotates to drive the eccentric shaft 31 to rotate, the connecting rings 33 are rotationally connected with the eccentric shaft 31 through bearings, and the two connecting rings 33 are respectively connected to two sides of the wind wheel 32, so that the rotation balance of the wind wheel 32 can be maintained. Further, the casing 10 includes a front casing 11 and a rear casing 12, the front casing 11 and the rear casing 12 are in cover connection, the front casing 11 and the rear casing 12 can be fixed by screw connection or snap connection, the wind guiding member 20 and the inner side wall of the rear casing 12 are integrally formed, the air inlet end 21 of the wind guiding member 20 is located at the upper end of the casing 10, the air outlet end 22 of the wind guiding member 20 is located at the lower end of the wind guiding member 20, the air outlet end 22 of the wind guiding member 20 is provided with a rear accommodating groove 121 communicated with the wind guiding member 20, a front accommodating groove 111 is correspondingly arranged at the inner side of the front casing 11, when the front casing 11 and the rear casing 12 are in cover connection, the rear accommodating groove 121 and the front accommodating groove 111 are in cover connection to form an accommodating cavity, the size of the accommodating cavity is larger than that of the wind wheel 32, the wind wheel 32 is rotatably mounted in the accommodating cavity, the accommodating cavity is provided with an air hole 13 communicated with the outer part of the casing 10, the wind wheel 32 can normally rotate, the air hole 13 is opened below the wind guiding member 20 to the wind wheel 32, and the wind is prevented from being split. The two side groove walls of the rear accommodating groove 121 are respectively provided with a rear connecting groove 122, the two side groove walls of the front accommodating groove 111 are correspondingly provided with a front connecting groove 112, the front connecting groove 112 and the rear connecting groove 122 are covered to form an annular groove, the connecting ring 33 is sleeved in the annular groove, the annular groove and the connecting ring 33 form interference fit, the two connecting rings 33 clamp the wind wheel 32 in the middle, the upper ends of the two transmission arms 40 are respectively positioned at the two sides of the accommodating cavity, the two connecting rings 33 are clamped in the middle, the limiting effect on the connecting rings 33 can be achieved, the connecting rings 33 can jump up and down in the annular groove along with the rotation of the eccentric shaft 31 when the wind wheel 32 rotates, the connecting rings 33 are made of materials with certain elasticity, preferably rubber rings, and a certain damping effect can be achieved. After the pneumatic assembly is adopted, through the air guide piece 20 integrally formed with the rear shell 12 and the accommodating cavity formed by integrally forming the air guide piece with the front shell 11 and the rear shell 12 respectively, the connection between each part in the shell 10 and the shell 10 is firmer, the structural strength of the air guide piece 20 and the shell 10 is improved, meanwhile, fewer parts are independently arranged in the shell 10, the installation space in the shell 10 is saved, the shell 10 is convenient to thicken, and the service life of the pneumatic tool is longer.

Further, the wind outlet direction of the wind guide 20 is tangential to the wind wheel 32, the external teeth of the wind wheel 32 are arc-shaped, and the arc-shaped back faces the air outlet end 22 of the wind guide 20, so that larger wind resistance can be generated, and the wind wheel 32 rotates faster.

Further, the opening of the air inlet end 21 of the air guiding member 20 is larger than the opening of the air outlet end 22, so that the wind pressure is larger and the wind force is stronger when the high-pressure air flow is blown out from the air outlet end 22.

Further, a chuck spindle 41 is connected to the lower end of the driving arm 40, and may be used to connect different bits or grindstones.

The embodiment of the utility model also provides a pneumatic grinder, which comprises the pneumatic assembly.

It is apparent that the above-described embodiments are only some embodiments of the present utility model, but not all embodiments, and the preferred embodiments of the present utility model are shown in the drawings, which do not limit the scope of the patent claims. This utility model may be embodied in many different forms, but rather, embodiments are provided in order to provide a thorough and complete understanding of the present disclosure. Although the utility model has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing description, or equivalents may be substituted for elements thereof. All equivalent structures made by the content of the specification and the drawings of the utility model are directly or indirectly applied to other related technical fields, and are also within the scope of the utility model.

Claims

1. A pneumatic assembly, comprising: the wind guiding device comprises a shell (10), a wind guiding piece (20), a wind wheel assembly (30) and a transmission arm (40);

The wind guide piece (20) is arranged in the shell (10), the wind wheel assembly (30) is arranged in the shell (10) and is movably connected with the shell (10), the upper ends of the two transmission arms (40) are respectively connected with the two ends of the wind wheel assembly (30), the wind guide piece (20) is used for connecting high-pressure air flow to drive the wind wheel assembly (30) to rotate, and the wind wheel assembly (30) drives the transmission arms (40) to reciprocate up and down;

the wind wheel assembly (30) comprises an eccentric shaft (31), a wind wheel (32) and two connecting rings (33), wherein the eccentric shaft (31) is erected between the two transmission arms (40), the wind wheel (32) and the connecting rings (33) are respectively and fixedly connected to the eccentric shaft (31), and the two connecting rings (33) are respectively and rotatably connected to two sides of the wind wheel (32);

The shell (10) comprises a front shell (11) and a rear shell (12), the front shell (11) is connected with the rear shell (12) in a covering manner, the air guide piece (20) is integrally formed with the inner wall of the rear shell (12), an air outlet end (22) of the air guide piece (20) is provided with a rear containing groove (121) communicated with the air guide piece (20), a front containing groove (111) is correspondingly arranged on the inner side of the front shell (11), the rear containing groove (121) is connected with the front containing groove (111) in a covering manner to form a containing cavity, the wind wheel (32) is installed in the containing cavity, and the containing cavity is provided with an air hole (13) communicated with the outside of the shell (10); rear connecting grooves (122) are respectively formed in the groove walls on the two sides of the rear accommodating groove (121), front connecting grooves (112) are correspondingly formed in the groove walls on the two sides of the front accommodating groove (111), the front connecting grooves (112) are covered with the rear connecting grooves (122) to form annular grooves, and connecting rings (33) are sleeved in the annular grooves.

2. Pneumatic assembly according to claim 1, characterized in that the air inlet end (21) of the air guide (20) is located at the upper end of the housing (10), and the air outlet end (22) of the air guide (20) is located above the wind wheel (32).

3. A pneumatic assembly according to claim 2, wherein the wind direction of the wind guide (20) is tangential to the wind wheel (32).

4. A pneumatic assembly according to claim 3, characterized in that the air hole (13) is located below the wind wheel (32).

5. A pneumatic assembly according to claim 4, wherein the opening of the air inlet end (21) of the air guide (20) is larger than the opening of the air outlet end (22) thereof.

6. Pneumatic assembly according to claim 1, characterized in that the two transmission arms (40) are combined in a Y-shaped configuration.

7. A pneumatic assembly according to claim 6, wherein the upper ends of the two transmission arms (40) are located on either side of the receiving chamber.

8. A pneumatic assembly according to claim 7, characterized in that the lower end of the transmission arm (40) is connected with a chuck spindle (41).

9. Pneumatic assembly according to claim 8, characterized in that the connection ring (33) is a rubber ring.

10. A pneumatic grinder comprising a pneumatic assembly as claimed in any one of claims 1 to 9.