CN210147980U

CN210147980U - Connecting structure of electric pick front barrel and gear box

Info

Publication number: CN210147980U
Application number: CN201921071937.2U
Authority: CN
Inventors: 应济锋
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-07-10
Filing date: 2019-07-10
Publication date: 2020-03-17
Anticipated expiration: 2029-07-10

Abstract

The utility model discloses a connection structure of a preceding section of thick bamboo of electric pick and gear box, it relates to the electric tool field, install the electric pick chuck in the preceding section of thick bamboo, and the electric pick chuck adopts interference pressure equipment to form integral type structure with the preceding section of thick bamboo, install the impacter on the electric pick chuck, the impacter passes through the position sleeve location, the position sleeve is connected with the cylinder, and position sleeve and cylinder adopt interference tight fit pressure equipment design with the preceding section of thick bamboo, the cylinder embeds there is the impactor, the cylinder sets up in the gear box, and the gear box is connected with the preceding section of thick bamboo, be provided with the transition circular arc on a side tang of the preceding section of thick bamboo, the transition circular arc on a side tang of the preceding section of thick bamboo and the clear angle interlock on the concave tang. Its structural design is reasonable, simple manufacture, and convenient to use adopts integral type structural design between electric pick chuck and the preceding section of thick bamboo, and it is more convenient to install, adopts the interlock of transition circular arc and chamfer to realize the required location of product and sealed requirement between preceding section of thick bamboo and the gear box, has satisfied people's user demand.

Description

Connecting structure of electric pick front barrel and gear box

The technical field is as follows:

the utility model relates to a connection structure of a section of thick bamboo before electric pick and gear box belongs to electric tool technical field.

Background art:

the electric hammer is an electric tool with wide application, and is characterized in that a piston driven by a motor and provided with a crankshaft connecting rod is additionally arranged on the basis of an electric drill, air is compressed in a cylinder in a reciprocating manner, so that the air pressure in the cylinder is changed periodically, and the changed air pressure drives a hammer in the cylinder to strike the top of a drill bit in a reciprocating manner, namely the hammer is used for striking the drill bit.

At present, split type structural design is adopted with the preceding section of thick bamboo to current electric pick chuck, and fixed through 4 fixation nut, most electric tool at present, lithium electric tool all has the gear box structure, be used for realizing required rotational speed and moment of torsion, inside gear and part are lubricated through lubricating oil, prevent the oil stain seepage between the gear box body subassembly, generally adopt the sealing washer, paper pad and sealed glue realize sealed effect, this kind of sealed mode not only operates complicacy, sealed effect is poor moreover, people's user demand can not be satisfied.

The utility model has the following contents:

to the above problem, the to-be-solved technical problem of the utility model is to provide a connection structure of a section of thick bamboo and gear box before electric pick.

The utility model discloses a connection structure of a section of thick bamboo before electric pick and gear box, it contains a preceding section of thick bamboo, the electric pick chuck, the impacter, the position sleeve, hit the son, cylinder and gear box, install the electric pick chuck in the preceding section of thick bamboo, and the electric pick chuck adopts interference pressure equipment to form integral type structure with a preceding section of thick bamboo, install the impacter on the electric pick chuck, the impacter passes through the position sleeve location, the position sleeve is connected with the cylinder, and position sleeve and cylinder adopt interference close fit pressure equipment design with a preceding section of thick bamboo, the cylinder embeds there is the striker, the cylinder sets up in the gear box, and the gear box is connected with a preceding section of thick bamboo, be provided with the transition circular arc on a side male end of a preceding section of thick bamboo, transition circular arc on a side male end of a preceding section of thick bamboo side.

The utility model has the advantages that: its structural design is reasonable, simple manufacture, and convenient to use adopts integral type structural design between electric pick chuck and the preceding section of thick bamboo, and it is more convenient to install, adopts the interlock of transition circular arc and chamfer to realize the required location of product and sealed requirement between preceding section of thick bamboo and the gear box, has satisfied people's user demand.

Description of the drawings:

for ease of illustration, the invention is described in detail by the following detailed description and accompanying drawings.

Fig. 1 is a schematic structural view of the present invention;

FIG. 2 is an enlarged view of portion B of FIG. 1;

fig. 3 is a schematic view of a partial structure of the present invention.

1-front barrel; 1-1-transition arc; 2-electric pick chuck; 3-an impactor; 4-positioning sleeve; 5-a striker; 6-cylinder; 7-a gearbox; 7-1-corner cleaning.

The specific implementation mode is as follows:

as shown in fig. 1 to fig. 3, the following technical solutions are adopted in the present embodiment: the electric pick comprises a front barrel 1, an electric pick chuck 2, an impactor 3, a positioning sleeve 4, an impactor 5, a cylinder 6 and a gear box 7, wherein the electric pick chuck 2 is arranged in the front barrel 1, the electric pick chuck 2 and the front barrel 1 are in an interference press-fitting integrated structure, the impactor 3 is arranged on the electric pick chuck 2, the impactor 3 is positioned through the positioning sleeve 4, the positioning sleeve 4 is connected with the cylinder 6, the positioning sleeve 4 and the cylinder 6 and the front barrel 1 are in interference tight fit press-fitting design, the impactor 5 is arranged in the cylinder 6, the cylinder 6 is arranged in the gear box 7, the gear box 7 is connected with the front barrel 1, a transition arc 1-1 is arranged on a convex spigot on one side surface of the front barrel 1, a transition arc 1-1 on a convex spigot on one side surface of the front barrel 1 is meshed with a chamfer 7-1 on a concave spigot on one end of the gear box 7, and the transition arc 1-1 on the convex spigot on one side surface of the front barrel 1 are automatically aligned during assembly, and then uniform interference tracks can be generated, the part 7-1 of the gear box 7 with the chamfer has very weak strength and is very easy to generate plastic deformation under the action of external force, and the material of the interference part generates plastic and elastic deformation to realize the sealing effect under the action of assembly fastening force during interference assembly.

In the specific embodiment, during finish machining, a cutter with a proper cutter point R is selected, a workpiece with a convex spigot is turned and milled by the cutter, the cutter point R (as shown in figure 2) is necessarily left at the joint of the plane and the vertical surface of the convex spigot, when a concave spigot matched with the cutter is machined, a X, Y step is machined, X is necessarily larger than R, Y is necessarily smaller than R, chamfering is not performed, (the size of Y is related to the selection of the cutter point R, the material strength of the workpiece and the assembling fastening force), so that a sharp corner is formed between the plane A and the vertical surface B, when the concave spigot is machined, the surface A can be machined firstly, then the surface B can be machined, so that the plastic deformation generated by extruding the workpiece by the cutter cutting is on the surface A, the assembly is facilitated, when the value Y is within the tolerance matched with the spigot, X, Y can be omitted, and the proper cutter point R can be selected; because the strength of the corner cleaning part of the concave spigot is weak, the corner cleaning part can easily generate plastic deformation and elastic deformation when being acted by external force, and the R on the convex spigot has the guiding function during assembly, can automatically align and position with the corner cleaning part of the concave spigot to generate an even interference line, and the interference line is occluded under the action of assembly fastening force to realize sealing.

In the practical production of the specific embodiment, according to the strength of different materials and the strength of the assembling fastening force, the positioning and sealing requirements required by a product can be met by adjusting the size of the circular arc R on the convex spigot and the Y size of the concave spigot and matching the assembling fastening force; through many times of experiments, the 5mm tang of 50x 50 mm's aluminium part, excessive circular arc R0.4mm is got to protruding type tang, and 0.05mm is got to the Y of concave type tang, and tang fit clearance 0.05mm is fastened with 4M 5 screws, and sealed effect is very good, and batch qualification rate 100% reaches the requirement completely.

This embodiment structural design is reasonable, simple manufacture, and convenient to use adopts integral type structural design between electric pick chuck and the preceding section of thick bamboo, and it is more convenient to install, adopts the interlock of transition circular arc and angle cleaning to realize the required location of product and sealed requirement between preceding section of thick bamboo and the gear box, has satisfied people's user demand.

According to the improvement of the precision of the existing machine tool, the machine tool is popularized, the R angle of the tool nose can be made very standard and consistent, the cost is not required to be increased, and the method can be applied to the actual operation of most electric tools.

The basic principles and the main features of the invention and the advantages of the invention have been shown and described above. It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the foregoing embodiments and descriptions are provided only to illustrate the principles of the present invention without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. The utility model provides a connection structure of a section of thick bamboo and gear box before electric pick which characterized in that: the electric pick comprises a front barrel (1), an electric pick chuck (2), an impactor (3), a positioning sleeve (4), an impactor (5), a cylinder (6) and a gear box (7), wherein the electric pick chuck (2) is installed in the front barrel (1), the electric pick chuck (2) and the front barrel (1) adopt interference press-fitting to form an integrated structure, the impactor (3) is installed on the electric pick chuck (2), the impactor (3) is positioned through the positioning sleeve (4), the positioning sleeve (4) is connected with the cylinder (6), the positioning sleeve (4) and the cylinder (6) and the front barrel (1) adopt interference tight fit press-fitting design, the impactor (5) is arranged in the cylinder (6), the cylinder (6) is arranged in the gear box (7), the gear box (7) is connected with the front barrel (1), a transition arc (1-1) is arranged on a convex spigot on one side face of the front barrel (1), an arc (1-1) on a transition arc (1) and a concave spigot on one end of the gear box (7) The corners (7-1) are meshed.