CN218425791U

CN218425791U - Main shaft balancer

Info

Publication number: CN218425791U
Application number: CN202222398680.XU
Authority: CN
Inventors: 袁李平; 陈凯; 林小丹; 柴兆霞; 刘宗
Original assignee: Shanghai Chengxiang Electromechanical Equipment Co ltd
Current assignee: Shanghai Chengxiang Electromechanical Equipment Co ltd
Priority date: 2022-09-09
Filing date: 2022-09-09
Publication date: 2023-02-03
Anticipated expiration: 2032-09-09

Abstract

The utility model discloses a main shaft balancer belongs to drilling equipment technical field. The balancer comprises a balancer body, wherein the balancer body comprises a balancer outer sleeve, a balancer inner sleeve, a positioning pin and a roller pin gasket, a stepped hole is formed in the end face of the balancer outer sleeve and penetrates through the balancer outer sleeve, the balancer inner sleeve is located in an upper cavity of the stepped hole, the radius of the cross section of an inner cavity passage of the balancer inner tube is the same as that of the cross section of an inner cavity of a lower cavity of the stepped hole, a first inner ring groove is formed in the lower cavity of the stepped hole, a first sealing element is sleeved in the first inner ring groove, a second inner ring groove is formed in the balancer inner sleeve, a second sealing element is sleeved in the second inner ring groove, a first outer ring groove is formed in the balancer inner sleeve, and a third sealing element is sleeved in the first outer ring groove. The utility model discloses the balancer, can the cover establish on motor spindle, very big rocking and the concentricity problem that has reduced motor spindle, and the long-time drilling back drill bit of rig is very light just can unload.

Description

Main shaft balancer

Technical Field

The utility model relates to a main shaft balancer belongs to drilling equipment technical field.

Background

The drilling machine is a widely used electric tool and is widely used in various industries. However, after the main shaft of the drilling machine and the drill bit work for a long time, concentricity can not be guaranteed necessarily due to vibration, so that the drill bit is shaken and is difficult to detach after long-time drilling, and the drill bit can only be knocked by manpower, and the fatigue of an operator can be increased under the working conditions that the operator needs to operate for a long time, so that the control instability and the cost are high.

Disclosure of Invention

The utility model aims to solve the technical problem that: a main shaft balancer is provided, which solves the problems of shaking and concentricity of a main shaft. And the drill bit can be easily detached after long-time drilling.

The utility model discloses the technical problem that will solve takes following technical scheme to realize:

a spindle balancer comprises a balancer body, wherein the balancer body comprises a balancer outer sleeve, a balancer inner sleeve, a positioning pin and a needle roller gasket, a stepped hole is formed in the end face of the balancer outer sleeve and penetrates through the balancer outer sleeve, the balancer inner sleeve is located in an upper cavity of the stepped hole, the radius of the cross section of an inner cavity passage of the balancer inner tube is the same as that of the cross section of an inner cavity of a lower cavity of the stepped hole, a first inner ring groove is formed in the lower cavity of the stepped hole, a first sealing element is sleeved in the first inner ring groove, a second inner ring groove is formed in the balancer inner sleeve, a second sealing element is sleeved in the second inner ring groove, a first outer ring groove is formed in the balancer inner sleeve and is provided with a third sealing element, the needle roller gasket is placed on the end face of the inner cavity of the stepped hole, the radius of the cross section of the inner cavity of the needle roller gasket is the same as that of the cross section of the inner cavity of the lower cavity of the stepped hole, the balancer body is provided with a plurality of positioning pins, and the positioning pins sequentially penetrate through the balancer outer sleeve, the balancer outer sleeve and the needle roller gasket and the inner sleeve in the length direction.

As a preferable example, the number of the positioning pins is two, and the positioning pins are respectively located at both ends of the axis of the balancer body.

The utility model has the advantages that: the utility model discloses the main shaft balancer cover that mentions is established on motor spindle's lateral wall, a contact area for increase motor spindle (motor spindle's cross section is less relatively, the balancer cover is established on motor spindle, the balancer can contact with the drill bit as partly of main shaft) and drill bit, effectively make the cover establish the motor spindle of balancer and the concentricity reinforcing of drill bit, furthermore, after drilling equipment works for a long time, block between drill bit and the motor spindle, hardly take out, but after joining in marriage the main shaft balancer, there is reciprocal swing clearance because the effect of bearing washer between balancer endotheca and the balancer overcoat, make the drill bit be difficult to block and die, thereby make things convenient for the dismantlement of drill bit.

Drawings

Fig. 1 is an exploded view of a drill equipped with a spindle balancer according to the present invention.

In the figure: the device comprises a motor main shaft 1, a first sealing element 2, a positioning pin 3, a balancer outer sleeve 4, a needle roller gasket 5, a second sealing element 6, a balancer inner sleeve 7, a third sealing element 8 and a drill bit 9.

Detailed Description

In order to make the technical means, the creation features, the achievement purposes and the functions of the present invention easy to understand and understand, the present invention is further explained by combining the following specific drawings.

As shown in fig. 1, a spindle balancer includes a balancer body, the balancer body includes a balancer outer sleeve 4, a balancer inner sleeve 7, positioning pins 3 and needle roller spacers 5, a stepped hole is formed in an end face of the balancer outer sleeve 4, the stepped hole penetrates through the balancer outer sleeve 4, the balancer inner sleeve 7 is located in an upper cavity of the stepped hole, a cross section of an inner cavity passage of the balancer inner tube is identical to a radius of a cross section of an inner cavity of a lower cavity of the stepped hole, a first inner ring groove is formed in the lower cavity of the stepped hole, a first sealing member 2 is sleeved in the first inner ring groove, a second inner ring groove is formed in the balancer inner sleeve 7, a second sealing member 6 is sleeved in the second inner ring groove, a first outer ring groove is formed in the balancer inner sleeve 7, a third sealing member 8 is sleeved in the first outer ring groove, the needle roller spacers 5 are placed on an end face of the inner cavity of the stepped hole, a cross section of an inner cavity of the needle roller spacers 5 is identical to a radius of a cross section of the inner cavity of the lower cavity of the stepped hole, the balancer body has a plurality of positioning pins 3, and the positioning pins 3 sequentially penetrate through the balancer outer sleeve 4, the needle roller spacers 5 and the balancer inner sleeve 7 in a length direction.

It should be noted that the balancer body is integrally of a circular structure, an inner cavity of the circular structure is formed by a lower cavity of a stepped hole, an inner cavity of the needle roller gasket 5 and an inner cavity of the balancer inner sleeve 7 (the radii of the cross sections of the three cavities are the same), the needle roller gasket 5 and the balancer inner sleeve 7 are sequentially placed in the inner cavity of the stepped hole, the number of the positioning pins 3 is two, the positioning pins 3 are respectively located at two ends of the axis of the balancer body, the needle roller gasket 5, the balancer inner sleeve 7 and the balancer outer sleeve 4 are respectively provided with two through holes (the main body of the needle roller gasket 5 is of a circular structure, the through holes in the needle roller gasket 5 and the balancer inner sleeve 7 are respectively long circular holes which are arranged in a bending manner, the bending range of the long circular holes is overlapped with an arc line, the axis of the needle roller gasket 5 passes through the center of the circular arc line, the through hole in the balancer outer sleeve 4 is a circular hole, that the needle roller gasket 5, the balancer inner sleeve 7 and the balancer outer sleeve 4 are limited by the positioning pins, the gasket 5 and the balancer inner sleeve 7 and the balancer can be arranged through the long circular holes, so that the needle roller gasket 5 and the balancer inner sleeve 7 can rotate a small amount along the axis of the three parts (the needle roller gasket 5, the needle roller 4) can sequentially pass through the positioning pins and the outer sleeve 3) and the balancer inner sleeve 7 to fix the three parts, and the three parts (the three parts) in the balancer inner sleeve 3).

The inner ring groove is a circumferential groove on the side wall of the inner cavity, the outer ring groove is a circumferential groove on the outer side wall, all the sealing elements are O-shaped rings, and the first sealing element 2 is used for increasing friction force when the inner cavity of the balancer outer sleeve 4 is in contact with the motor main shaft 11 so as to prevent the balancer body from sliding on the motor main shaft 11; the second sealing element 6 is used for increasing the friction force when the inner cavity of the balancer inner sleeve 7 is contacted with the motor main shaft 11, and preventing the balancer body from sliding on the motor main shaft 11; the third sealing member 8 is used for increasing the friction force between the balancer inner sleeve 7 and the balancer outer sleeve 4 and preventing the balancer inner sleeve 7 and the balancer outer sleeve 4 from being structurally decomposed and loosened in the using process.

When in use: firstly, assembling a balancer, sleeving a first sealing element 2 into an inner ring groove of a balancer outer sleeve 4, sleeving a second sealing element 6 into an inner ring groove of a balancer inner sleeve 7, and sleeving a third sealing element 8 into an outer ring groove of the balancer inner sleeve 7; and then two positioning pins 3 are arranged in two through holes on the outer balancer sleeve 4, the roller pin gasket 5 is arranged in the stepped hole of the outer balancer sleeve 4, the roller pin gasket 5 is rotated to ensure that the positioning pins 3 can also pass through the roller pin gasket 5, finally, the inner balancer sleeve 7 is arranged in the upper cavity of the stepped hole of the outer balancer sleeve 4, and the inner balancer sleeve 7 is rotated to ensure that the positioning pins 3 can further extend into the through holes on the inner balancer sleeve 7.

The motor spindle 11 is coated with butter, the assembled balancer is sleeved on the motor spindle 11, and then the drill bit 9 is screwed into the motor spindle 11 to complete assembly (the end of the motor spindle 11 is provided with an external thread, and the end of the drill bit 9 is provided with an internal thread matched with the external thread).

The biggest external diameter that is provided with hexagonal structure on the drill bit 9 lateral wall is 51mm, the biggest external diameter of 11 shaft ends of motor spindle is 39mm, drill bit 9 mainly leans on this face to keep balance, main shaft head external diameter 39mm is obviously less than 51mm, therefore the concentricity of main shaft is not good, install the balancer additional after, the inner circle external diameter of balancer is 52mm, the area of contact that can be very big like this, the effectual concentricity that makes main shaft-drill bit 9 strengthens, furthermore, when drilling equipment worked for a long time, block between drill bit 9 and the main shaft, hardly take out, join in marriage the main shaft balancer after, there is reciprocal swing clearance owing to the effect of bearing washer 5 between the endotheca of balancer and the overcoat, consequently, drill bit 9 just is difficult to block, thereby convenient the dismantlement.

The foregoing shows and describes the basic principles and principal features of the invention, together with the advantages thereof. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that various changes and modifications may be made without departing from the spirit and scope of the invention, and such changes and modifications fall within the scope of the claimed invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. The utility model provides a main shaft balancer, includes the balancer body, the balancer body includes balancer overcoat (4), balancer endotheca (7), locating pin (3) and kingpin gasket (5), its characterized in that: the end face of the outer balancer sleeve (4) is provided with a stepped hole, the stepped hole penetrates through the outer balancer sleeve (4), the inner balancer sleeve (7) is located in an upper cavity of the stepped hole, the cross section of an inner cavity passage of the inner balancer tube is identical to the radius of the cross section of an inner cavity of a lower cavity of the stepped hole, a first inner ring groove is formed in the lower cavity of the stepped hole, a first sealing element (2) is sleeved at the first inner ring groove, a second inner ring groove is formed in the inner balancer sleeve (7), a second sealing element (6) is sleeved in the second inner ring groove, a first outer ring groove is formed in the inner balancer sleeve (7), a third sealing element (8) is sleeved in the first outer ring groove, the end face of the inner cavity of the stepped hole is provided with the gasket (5), the cross section of an inner cavity of the roller pin gasket (5) is identical to the radius of the cross section of the inner cavity of the lower cavity of the stepped hole, the body is provided with a plurality of positioning pins (3), and the positioning pins (3) sequentially penetrate through the outer balancer sleeve (4), the roller pin gasket (5) and the inner balancer sleeve (7).

2. A spindle balancer as claimed in claim 1, wherein: the number of the positioning pins (3) is two, and the positioning pins (3) are respectively positioned at two ends of the axis of the balancer body.