Transmission shaft structure of grinding machine

Abstract

The utility model discloses a polisher transmission shaft structure which comprises a shell, a power device and a speed reducer are arranged in a holding portion of the shell, the power device drives the speed reducer to rotate when working, the speed reducer is connected with a transmission shaft assembly arranged in the shell, the transmission shaft assembly comprises a hard shaft and a flexible shaft, and the hard shaft is sleeved on the outer layer of the flexible shaft. A grinding assembly pivoted to the shell is arranged at the tail end of the shell, and a dust suction pipe is arranged between the grinding assembly and a main shaft of the shell. The flexible shaft penetrates through the dust suction pipe and is rotationally connected with a grinding head in the grinding assembly, and the hard shaft is rotationally connected with the speed reduction device. The whole-section type transmission shaft assembly is arranged in the shell, the grinding assembly can be directly driven to work by driving the transmission shaft assembly through the motor, the structure is simple and reliable, and the transmission speed is high.

Description

Technical Field

[0001] The utility model belongs to the technical field of grinding machine accessories, and in particular relates to a grinding machine transmission shaft structure. Background Art

[0002] A grinder is a commonly used grinding tool. Generally, existing grinders include a motor and a transmission shaft. The transmission shaft is connected to a grinding head, so that the motor can drive the grinding head to rotate. Since the transmission shaft has a certain length, it is convenient to extend the position of the grinding head and has better versatility. A transmission shaft structure of a grinder is disclosed in the patent document with publication number CN202742208U; the transmission shaft of the existing public transmission grinder often adopts a multi-section shaft connection method, and the production cost of this multi-axis connection structure is relatively high. At the same time, the connection structure of the multi-section shaft will use multiple connectors to connect each section of the transmission shaft of different lengths; then the overall connection parts of the transmission shaft are more, and the transmission process is not smooth enough. Secondly, the transmission efficiency of the transmission method using a multi-section shaft is low, resulting in poor grinding effect. Therefore, it is necessary to design a grinder transmission shaft structure to overcome the above difficulties. Summary of the invention

[0003] In view of the problems existing in the prior art, the utility model designs a grinding machine transmission shaft structure. A whole-section transmission shaft assembly is arranged in the shell of the utility model. The transmission shaft assembly can directly drive the grinding assembly to work by driving the motor. The structure is simple and reliable, and the transmission speed is fast.

[0004] The invention objective of the utility model is achieved through the following technical scheme: a grinding machine transmission shaft structure, including a shell, a power device and a reduction device are arranged in the gripping part of the shell, the power device drives the reduction device to rotate when working, the reduction device is connected to the transmission shaft assembly arranged in the shell, the transmission shaft assembly includes a hard shaft and a soft shaft, the hard shaft sleeve is installed on the outer layer of the soft shaft; a grinding assembly pivotally connected to the end of the shell is provided, a dust suction pipe is provided between the grinding assembly and the main shaft of the shell; the soft shaft passes through the dust suction pipe and is rotatably connected to the grinding head in the grinding assembly, and the hard shaft is rotatably connected to the reduction device.

[0005] Preferably, the power device is a driving motor, the reduction device is a speed reducer, and the driving motor is rotationally connected to the speed reducer; the end of the hard shaft close to the speed reducer is provided with a connecting transmission part for transmission, and the outer contour of the connecting transmission part matches the outer contour of the speed reducer.

[0006] Preferably, the connecting transmission part is an ellipse or a regular polygon. When the power device is working, the connecting transmission part is driven to rotate through the reduction device, and when the connecting transmission part rotates, the hard shaft is driven to rotate. The reducer includes gears, and the transmission connection part also includes gears. The gears mesh with each other, so that the reducer can drive the transmission connection part to rotate.

[0007] Preferably, the hard shaft sleeve is installed on the outer layer of the soft shaft, and the end of the soft shaft close to the grinding component passes through the end of the hard shaft; the hard shaft wraps the soft shaft, and the two are tightly fitted and connected.

[0008] Preferably, the hard shaft is a hollow shaft-shaped body, and the soft shaft is a regular polygonal column-shaped body; the inner wall contour of the hard shaft matches the outer wall contour of the soft shaft.

[0009] Preferably, the hard shaft is a metal part, and the hard shaft is a steel tube, an aluminum alloy tube or a copper tube.

[0010] Preferably, the hard shaft is a metal part with conductive properties.

[0011] Preferably, a fixing assembly is provided between the hard shaft and the main shaft of the shell, and the fixing assembly includes a positioning sleeve and a bearing; the positioning sleeve is sleeved and installed on the outer layer of the hard shaft, and the positioning sleeve is fixedly installed on the bearing, and the bearing is installed on the inner wall of the shell.

[0012] By setting up a fixing component, it is convenient to position the hard shaft in the shell, and the hard assembly is limited axially and radially by the bearing; at the same time, after the bearing is installed, a gap will be left between the transmission shaft assembly and the inner wall of the shell, and the hard shaft will not interfere with the inner wall of the shell when rotating.

[0013] Preferably, the outer contour of the bearing matches the inner wall contour of the housing; the inner wall contour of the positioning sleeve matches the outer contour of the hard shaft; and when the reduction device drives the hard shaft to rotate, the hard shaft rotates relative to the housing.

[0014] Preferably, a wire is provided on the bearing, and the wire passes through the inner wall of the shell.

[0015] By arranging the conducting wire, the conducting wire can lead out the electric charge in the dust passing through the dust suction pipe, thereby avoiding the harm of static electricity.

[0016] Compared with the prior art, the utility model has the following beneficial effects: the utility model is provided with a power device and a reduction device in the housing, and the speed ratio of the power device is reduced by the reduction device, so that the transmission shaft assembly has a greater torque when rotating, and the grinding effect of the grinding assembly is better. The transmission shaft assembly includes a hard shaft and a soft shaft, the hard shaft is formed in one piece separately, and the soft shaft is also formed in one piece separately, the hard shaft is sleeved on the outer layer of the soft shaft and the two are tightly fitted and connected; the transmission shaft assembly is a whole-section structure, and the whole-section structure is more stable and reliable and has high transmission efficiency. By installing a fixing assembly between the housing and the hard shaft, it is convenient to position the transmission shaft assembly, so that the transmission shaft assembly is more stable when rotating. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1It is the internal structure diagram of the utility model;

[0018] Figure 2 is a three-dimensional diagram of a transmission shaft assembly;

[0019] Figure 3 is a cross-sectional view of a transmission shaft assembly;

[0020] Figure 4 It is a schematic diagram of the assembly of the transmission shaft assembly and the connecting transmission part;

[0021] Figure 5 A schematic diagram of the installation and fixing components of the utility model;

[0022] Figure 6 is a schematic diagram of a fixed component;

[0023] Markings in the figure: 1. Shell; 2. Power unit; 3. Speed ​​reduction device; 4. Transmission shaft assembly; 41. Hard shaft; 42. Flexible shaft; 5. Grinding assembly; 6. Dust suction pipe; 7. Connecting transmission part; 8. Fixing assembly; 81. Positioning sleeve; 82. Bearing; 9. Wire. DETAILED DESCRIPTION

[0024] The present invention will be further described below with reference to the embodiments shown in the accompanying drawings:

[0025] like Figures 1 to 6 As shown, this embodiment discloses a grinding machine transmission shaft structure, including a shell 1, a power device 2 and a reduction device 3 are arranged in the gripping part of the shell 1, the power device 2 drives the reduction device 3 to rotate when working, the reduction device 3 is connected to the transmission shaft assembly 4 arranged in the shell 1, the transmission shaft assembly 4 includes a hard shaft 41 and a soft shaft 42, the hard shaft 41 is sleeved and installed on the outer layer of the soft shaft 42; a grinding assembly 5 is pivotally connected to the end of the shell 1, a dust suction pipe 6 is arranged between the grinding assembly 5 and the main shaft of the shell 1; the soft shaft 42 passes through the dust suction pipe 6 and is rotatably connected to the grinding head in the grinding assembly 5, and the hard shaft 41 is rotatably connected to the reduction device 3.

[0026] The power device 2 is a driving motor, and the reduction device 3 is a speed reducer, and the driving motor is connected to the speed reducer in rotation; the end of the hard shaft 41 close to the speed reducer 3 is provided with a connecting transmission part 7 for transmission, and the outer contour of the connecting transmission part 7 matches the outer contour of the speed reducer 3. The connecting transmission part 7 is an ellipse or a regular polygon. When the power device 2 is working, the connecting transmission part 7 is driven to rotate through the speed reducer 3, and the connecting transmission part 7 drives the hard shaft 41 to rotate when the connecting transmission part 7 rotates. The hard shaft 41 is sleeved and installed on the outer layer of the soft shaft 42, and the end of the soft shaft 42 close to the grinding assembly 5 passes through the end of the hard shaft 41; the hard shaft 41 is wrapped around the soft shaft 42, and the two are tightly connected. The hard shaft 41 is a hollow shaft-shaped body, and the soft shaft 42 is a regular polygonal columnar body; the inner wall contour of the hard shaft 41 matches the outer wall contour of the soft shaft 42. The hard shaft 41 is a metal part, and the hard shaft 41 is a steel pipe, an aluminum alloy pipe or a copper pipe. The hard shaft 41 is a metal part with conductive properties.

[0027] A fixing assembly 8 is provided between the hard shaft 41 and the main shaft of the housing 1, and the fixing assembly 8 includes a positioning sleeve 81 and a bearing 82; the positioning sleeve 81 is sleeved and installed on the outer layer of the hard shaft 41, and the positioning sleeve 81 is fixedly installed on the bearing 82, and the bearing 82 is installed on the inner wall of the housing 1. The outer contour of the bearing 82 matches the inner wall contour of the housing 1; the inner wall contour of the positioning sleeve 81 matches the outer contour of the hard shaft 41; when the reduction device 3 drives the hard shaft 41 to rotate, the hard shaft 41 rotates relative to the housing 1. A wire 9 is provided on the bearing 82, and the wire 9 passes through the inner wall of the housing 1.

[0028] The specific operation process of this embodiment is as follows. When grinding is required, turn on the power device 2, which is a driving motor. The driving motor will drive the reduction device 3 to work. The reduction device 3 is a reducer, so the reducer will drive the connecting transmission part 7 to rotate; the connecting transmission part 7 is connected to the end of the hard shaft 41, so that the hard shaft 41 will rotate. Since the hard shaft 41 is provided with a soft shaft 42 that is tightly connected to it, the soft shaft 42 is rotatably connected to the grinding head in the grinding assembly 5, so that the soft shaft 42 will drive the grinding head to rotate. The hard shaft 41 is installed in the main shaft of the shell 1 through the fixed assembly 8, so that the hard shaft 41 can rotate reliably. A dust suction pipe 6 is provided between the shell 1 and the grinding assembly 5, and a wire 9 is provided on the bearing 82 of the fixed assembly 8, so that the wire 9 can lead out the charge in the dust passing through the dust suction pipe 6 to avoid electrostatic hazards.

[0029] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

Claims

1. A grinding machine transmission shaft structure, comprising a housing (1), characterized in that: A power device (2) and a reduction device (3) are arranged in the gripping portion of the housing (1); when the power device (2) is in operation, the reduction device (3) is driven to rotate; the reduction device (3) is connected to a transmission shaft assembly (4) arranged in the housing (1); the transmission shaft assembly (4) comprises a hard shaft (41) and a soft shaft (42); the hard shaft (41) is sleeved and mounted on the outer layer of the soft shaft (42); a grinding assembly (5) pivotally connected to the housing (1) is arranged at the end of the housing (1); a dust suction pipe (6) is arranged between the grinding assembly (5) and the main shaft of the housing (1); the soft shaft (42) passes through the dust suction pipe (6) and is rotationally connected to a grinding head in the grinding assembly (5); and the hard shaft (41) is rotationally connected to the reduction device (3).

2. The grinding machine transmission shaft structure according to claim 1, characterized in that: The power device (2) is a driving motor, the reduction device (3) is a speed reducer, and the driving motor is rotationally connected to the speed reducer; the end of the hard shaft (41) close to the speed reducer (3) is provided with a connecting transmission part (7) for transmission, and the outer contour of the connecting transmission part (7) matches the outer contour of the speed reducer (3).

3. The grinding machine transmission shaft structure according to claim 2, characterized in that: The connecting transmission part (7) is elliptical or regular polygonal, and when the power device (2) is working, the connecting transmission part (7) is driven to rotate through the reduction device (3), and when the connecting transmission part (7) rotates, the hard shaft (41) is driven to rotate.

4. The grinding machine transmission shaft structure according to claim 1, characterized in that: The hard shaft (41) is sleeved and installed on the outer layer of the soft shaft (42), and the end of the soft shaft (42) close to the grinding assembly (5) passes through the end of the hard shaft (41); the hard shaft (41) is arranged to wrap around the soft shaft (42), and the two are tightly fitted and connected.

5. The grinding machine transmission shaft structure according to claim 4, characterized in that: The hard shaft (41) is a hollow shaft-shaped body, and the soft shaft (42) is a regular polygonal column-shaped body; the inner wall contour of the hard shaft (41) and the outer wall contour of the soft shaft (42) match each other.

6. The grinding machine transmission shaft structure according to claim 4, characterized in that: The hard shaft (41) is a metal part, and the hard shaft (41) is a steel tube, an aluminum alloy tube or a copper tube.

7. The grinding machine transmission shaft structure according to claim 6, characterized in that: The hard shaft (41) is a metal piece with conductive properties.

8. The grinding machine transmission shaft structure according to claim 1, characterized in that: A fixing assembly (8) is provided between the hard shaft (41) and the main shaft of the housing (1), the fixing assembly (8) comprising a positioning sleeve (81) and a bearing (82); the positioning sleeve (81) is sleeved and mounted on the outer layer of the hard shaft (41), and the positioning sleeve (81) is fixedly mounted on the bearing (82), and the bearing (82) is mounted on the inner wall of the housing (1).

9. The grinding machine transmission shaft structure according to claim 8, characterized in that: The outer contour of the bearing (82) matches the inner wall contour of the housing (1); the inner wall contour of the positioning sleeve (81) matches the outer contour of the hard shaft (41); and when the reduction device (3) drives the hard shaft (41) to rotate, the hard shaft (41) rotates relative to the housing (1).

10. The grinding machine transmission shaft structure according to claim 8, characterized in that: A conductive wire (9) is provided on the bearing (82), and the conductive wire (9) passes through the inner wall of the housing (1).

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