CN219895841U - Cutter mounting structure of power system - Google Patents

Abstract

The utility model discloses a cutter mounting structure of a power system, which belongs to the field of medical appliances and comprises a cutter, a shell and a mounting shaft. One end of the cutter is provided with a bayonet along the circumferential direction. The housing includes a bearing. The installation shaft is rotationally connected with the shell through a bearing, an installation cavity is formed in the installation shaft, a plurality of glass bead screws are arranged on the installation shaft along the circumferential direction, a cutter can penetrate through one end of the installation cavity and is clamped with the glass bead screws through a bayonet, and the other end of the installation shaft is externally connected with a motor shaft. The cutter penetrates into the mounting cavity and then can automatically limit through the glass bead screw, and the cutter does not need to be matched with the mounting shaft through moving, so that the mounting structure is simplified. Friction between the mounting shaft and the housing is reduced by the bearing. The whole cutter system has simple structure, less interference of parts and small resistance in rotation, and is suitable for high-speed rotation of cutters.

Description

Cutter mounting structure of power system

Technical Field

The utility model belongs to the field of medical instruments, and particularly relates to a cutter mounting structure of a power system.

Background

Bone drills are surgical tools commonly used in the medical field, and the cutter is driven to rotate through a power system so as to achieve the functions of drilling and the like. The core component of the bone drill is a shell which is used for being held by hand and a sliding sleeve which is arranged in the shell and rotates relative to the shell, one end of the sliding sleeve is used for assembling a cutter, and the other end of the sliding sleeve is connected with a rotating shaft of the motor. In order to facilitate the clamping of the cutter and the sliding sleeve, the prior bone drill has complex structure of the shell, the sliding sleeve and the connecting part between the shell and the sliding sleeve, excessive interference among parts, large resistance during rotation, and incapability of realizing high-speed rotation of the cutter.

Disclosure of Invention

The present utility model is directed to a tool mounting structure for a power system, which solves the above-mentioned problems of the prior art.

There is provided a tool mounting structure of a power system, comprising:

one end of the cutter is provided with a bayonet along the circumferential direction;

a housing including a bearing;

the mounting shaft is rotationally connected with the shell through a bearing, a mounting cavity is formed in the mounting shaft, a plurality of bead screws are arranged on the mounting shaft along the circumferential direction, the cutter can penetrate through one end of the mounting cavity and is clamped with the plurality of bead screws through a bayonet, and the other end of the mounting shaft is externally connected with a motor shaft.

Further, a rubber retainer ring is arranged between the shell and the bearing.

Further, the motor shaft is provided with a plurality of flat positions along the length direction, the mounting shaft is provided with a plurality of fastening screws along the length direction, and a plurality of fastening screws are correspondingly arranged with a plurality of flat positions.

Compared with the prior art, the utility model has the beneficial effects that:

1. the cutter penetrates into the mounting cavity and then can automatically limit through the glass bead screw, and the cutter does not need to be matched with the mounting shaft through moving, so that the mounting structure is simplified. Friction between the mounting shaft and the housing is reduced by the bearing. The whole cutter system has simple structure, less interference of parts and small resistance in rotation, and is suitable for high-speed rotation of cutters.

2. The installation depth between the glass bead screw and the installation shaft is adjustable, the pressure of the glass bead to the cutter can be adjusted by adjusting the installation depth of the glass bead screw, and then the pulling and inserting force of the cutter can be adjusted.

Drawings

The present utility model is further described below with reference to the accompanying drawings for the convenience of understanding by those skilled in the art.

FIG. 1 is a schematic diagram of a prior art structure;

fig. 2 is a schematic overall structure of a tool mounting structure of a power system.

In the figure: 1. a cutter; 11. a bayonet; 2. a housing; 21. a bearing; 22. a rubber retainer ring; 3. a mounting shaft; 31. a mounting cavity; 32. a glass bead screw; 33. fastening a screw; 4. a motor shaft; 41. a flat position; 5. a sliding sleeve; 6. assembling a shaft; 7. a pen point; 8. steel balls; 9. and a return spring.

Detailed Description

The present utility model will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present utility model more apparent. It should be understood that the particular embodiments described herein are illustrative only and are not intended to limit the utility model, i.e., the embodiments described are merely some, but not all, of the embodiments of the utility model. The components of the embodiments of the present utility model generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the utility model, as presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, which can be made by a person skilled in the art without making any inventive effort, are intended to be within the scope of the present utility model.

Referring to fig. 1, fig. 1 is a schematic structural diagram of the prior art, and the cutter system includes a sliding sleeve 5, an assembling shaft 6, a pen point 7, a plurality of steel balls 8, and a return spring 9. The assembly shaft 6 is rotationally connected with the pen point 7 through a bearing 21, the reset spring 9 is limited between the sliding sleeve 5 and the pen point 7, and a plurality of steel balls 8 are arranged along the circumferential direction of the assembly shaft 6.

In the normal state, the steel balls 8 cannot move due to the blocking of the sliding sleeve 5, and the cutter 1 cannot be installed under the interference of the steel balls 8. When the cutter 1 is installed, the sliding sleeve 5 is compressed along the direction of the return spring 9, so that a gap capable of enabling the steel balls 8 to move is formed between the steel balls 8 and the sliding sleeve 5. When the cutter 1 is installed, the steel balls 8 are squeezed into the gaps, when the cutter encounters the bayonet 11, the steel balls 8 fall back, at the moment, the sliding sleeve 5 is loosened, the reset spring 9 releases potential energy to enable the sliding sleeve 5 to return, and the sliding sleeve 5 limits the steel balls 8 again, so that installation is completed.

The sliding sleeve 5 and the pen point 7 of the cutter system have friction, the return spring 9 and the pen point 7 have friction, and parts are worn and serious in heating during rapid rotation, so that the structure cannot rapidly rotate. In addition, the sliding sleeve 5 is pressed, held and loosened in the dismounting process of the cutter 1, and the process is complex. This structure has the disadvantage of being complex in structure and in the mounting process relative to the present utility model.

Referring to fig. 2, in an embodiment of the present utility model, a tool mounting structure of a power system includes a tool 1, a housing 2, and a mounting shaft 3. One end of the tool 1 is provided with a bayonet 11 in the circumferential direction. The housing 2 comprises a bearing 21. The installation shaft 3 is rotatably connected with the shell 2 through the bearing 21, an installation cavity 31 is formed in the installation shaft 3, a plurality of bead screws 32 are arranged on the installation shaft 3 along the circumferential direction, the cutter 1 can penetrate through one end of the installation cavity 31 and is clamped with the plurality of bead screws 32 through the bayonet 11, and the other end of the installation shaft 3 is externally connected with the motor shaft 4.

The bead screw 32 is a screw structure having an externally threaded housing, beads, and a spring member. The glass beads are limited at the end part of the shell through springs, and have certain pressure bearing capacity. After the cutter 1 enters from the mounting cavity 31, the cutter 1 extrudes the glass beads at the end parts of the glass bead screws 32, the glass beads roll back after being extruded, the cutter 1 can smoothly enter, and when the glass beads are positioned at the bayonets 11, the springs are released, so that the glass beads are clamped in the bayonets 11, and the assembly of the cutter 1 and the mounting shaft 3 is completed. The whole process does not need to move the mounting shaft 3, only the cutter 1, the glass beads and the springs move, the assembly process is simple and quick, the related parts are few, and the whole structure is greatly simplified.

Further, the outer part of the shell of the glass bead screw 32 is provided with external threads, and the glass bead screw 32 is fixedly connected with the mounting shaft 3 through threads. Accordingly, the fitting depth between the bead screw 32 and the mounting shaft 3 can be adjusted by adjusting the screwing degree of the screw. After the assembly depth of the bead screw 32 is adjusted, the compression depth of the spring caused by bead extrusion can be changed, so that the pulling and inserting force of the cutter 1 can be adjusted.

A rubber retainer ring 22 is arranged between the housing 2 and the bearing 21. The rubber retainer 22 is clamped between the housing 2 and the bearing 21 to serve as a buffer, so that the stability of the cutter 1 and the mounting shaft 3 during rotation is improved.

The motor shaft 4 is provided with a plurality of flat positions 41 along the length direction, the installation shaft 3 is provided with a plurality of fastening screws 33 along the length direction, and the plurality of fastening screws 33 are correspondingly arranged with the plurality of flat positions 41. The motor shaft 4 is fixed through the fastening screw 33, so that the cutter 1 is stable, and the flat position 41 can further enhance the stability between the fastening screw 33 and the motor shaft 4.

The foregoing is merely illustrative of the structures of this utility model and various modifications, additions and substitutions for those skilled in the art can be made to the described embodiments without departing from the scope of the utility model or from the scope of the utility model as defined in the accompanying claims.

Claims (3)

1. A cutter mounting structure of a power system, comprising:

the cutting tool comprises a cutting tool (1), wherein a bayonet (11) is arranged at one end of the cutting tool (1) along the circumferential direction;

-a housing (2) comprising a bearing (21);

the mounting shaft (3), rotate through bearing (21) between mounting shaft (3) and shell (2) and be connected, the inside of mounting shaft (3) forms installation cavity (31), mounting shaft (3) are provided with a plurality of glass bead screw (32) along circumference, cutter (1) can pass the one end in installation cavity (31) and pass through bayonet socket (11) and a plurality of glass bead screw (32) block, the external motor shaft (4) of the other end of mounting shaft (3).

2. A tool mounting structure of a power system according to claim 1, characterized in that a rubber collar (22) is arranged between the housing (2) and the bearing (21).

3. The cutter mounting structure of a power system according to claim 1, wherein the motor shaft (4) is provided with a plurality of flat portions (41) along a length direction, the mounting shaft (3) is provided with a plurality of fastening screws (33) along the length direction, and the plurality of fastening screws (33) are provided corresponding to the plurality of flat portions (41).