A variable pitch grinding machine

Abstract

The present invention discloses a variable pitch grinder, comprising a plurality of grinding heads, a planetary gear set mechanism and a driving device for driving the grinding heads to rotate, wherein the planetary gear set mechanism comprises a planetary frame, a planetary gear shaft and a sun gear, wherein the planetary gear shaft is provided with a linkage assembly for driving the grinding head; wherein the planetary frame is provided with a revolving grinding disc and a main driving shaft connected to the driving device, wherein the revolving grinding disc is provided with a grinding head track for adjusting the distance between the grinding head and the main driving shaft, wherein the grinding head is mounted on the grinding head track; wherein the driving device drives the planetary frame to rotate through the main driving shaft, so that the grinding head arranged on the planetary frame revolves around the main driving shaft while being driven by the planetary gear shaft. The present invention has good grinding effect, large grinding radius and high grinding efficiency, and is easy to change the grinding radius.

Description

Technical Field

[0001] The invention relates to the technical field of grinding, and in particular to a variable pitch grinder. Background Art

[0002] For surface processing, grinding, polishing and cutting of workpieces with large width, such as plates, the existing grinding method is generally carried out by setting multiple rows of interlaced grinding heads, and this grinding method will produce multiple grinding marks on the plate, thereby affecting the surface finish of the plate, especially for ornamental plates, such as tiles, stainless steel, pottery or wood materials, it will seriously affect the aesthetics of their surface patterns.

[0003] The existing method to solve the above-mentioned problem is generally to use a grinding belt and a hard abrasive material to perform full coverage grinding to achieve a smooth grinding surface, but this method causes large wear and tear and requires frequent shutdowns to replace the grinding belt, thereby increasing production costs and reducing production efficiency.

[0004] On the other hand, since the width of the grinding belt generally has a conventional standard, in order to cope with the extra-wide type, a specific corresponding grinding belt is required, which increases the production cost. Moreover, when used for grinding small plates, the effective utilization area of ​​the grinding belt is low, resulting in a waste of resources. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide a variable pitch grinder with good grinding effect, large grinding radius and high grinding efficiency, and easy to change the grinding radius.

[0006] In order to solve the above technical problems, the present invention provides a variable pitch grinding machine, comprising a plurality of grinding heads, a planetary gear set mechanism and a driving device for driving the grinding heads to rotate, wherein the planetary gear set mechanism comprises a planetary frame, a planetary gear shaft and a sun gear meshing with the planetary gear shaft, and the planetary gear shaft is provided with a linkage assembly for driving the grinding heads;

[0007] The planetary frame is provided with a revolving grinding disc and a main driving shaft connected to the driving device, the revolving grinding disc is provided with a grinding head track for adjusting the distance between the grinding head and the main driving shaft, and the grinding head is installed on the grinding head track;

[0008] The driving device drives the planetary frame to rotate through the main driving shaft, so that the grinding head arranged on the planetary frame revolves around the main driving shaft while being driven by the planetary gear shaft.

[0009] As an improvement of the above solution, the trajectory of the grinding head track is an arc with the planetary gear shaft as the center.

[0010] As an improvement of the above solution, each of the grinding heads is equipped with the grinding head track, and the two ends of the grinding head track are respectively the farthest end and the nearest end;

[0011] The grinding head moves along the grinding head track from the farthest end to the nearest end, and the distance between the grinding head and the main driving shaft gradually decreases.

[0012] As an improvement of the above solution, the grinding head track is a long hole of the revolving grinding disc.

[0013] As an improvement of the above solution, a plurality of positioning holes for controlling the installation position of the grinding head are provided on both sides of the grinding head track.

[0014] As an improvement of the above-mentioned scheme, the grinding head includes a rotating disk for mounting a grinding part and a grinding head drive shaft and a rotating shaft base for driving the rotating disk to rotate. The grinding head drive shaft is installed on the rotating shaft base, one end of the grinding head drive shaft is connected to the rotating disk, and the other end is connected to the linkage assembly.

[0015] As an improvement of the above scheme, the linkage assembly includes a first transmission wheel installed on the planetary gear shaft, a second transmission wheel installed on the grinding head drive shaft and a synchronous transmission member, and the first transmission wheel drives the second transmission wheel to rotate through the synchronous transmission member.

[0016] As an improvement of the above solution, the farthest ends of the grinding head tracks are all located on the same concentric circle;

[0017] The nearest ends of the grinding head tracks are all located on the same concentric circle.

[0018] As an improvement of the above solution, the planetary frame is a shell structure, and the gear parts of the sun gear and the planetary gear shaft are arranged in the shell structure;

[0019] The grinding mill further comprises a traction sleeve for connecting external equipment, the traction sleeve is sleeved on the main driving shaft, and the sun gear is connected to the bottom of the traction sleeve.

[0020] As an improvement of the above solution, the driving device includes a motor and a reduction box, the main driving shaft is mounted on the reduction box, and the motor drives the main driving shaft through the reduction box.

[0021] The implementation of the present invention has the following beneficial effects:

[0022] The present invention discloses a variable pitch grinder, comprising a plurality of grinding heads, a planetary gear set mechanism and a driving device for driving the grinding heads to rotate, wherein the planetary gear set mechanism comprises a planetary frame, a planetary gear shaft and a sun gear meshed with the planetary gear shaft, and the planetary gear shaft is provided with a linkage assembly for driving the grinding heads; the planetary frame is provided with a revolving grinding disc and a main driving shaft connected to the driving device.

[0023] Therefore, due to the arrangement of the planetary gear set mechanism, the grinding head can be driven to rotate while the revolving grinding disc is driven to rotate, thereby forming an integral large grinding head, and realizing a grinding head with a very large grinding radius. Moreover, each single grinding head has its own grinding function, thereby improving the grinding effect and grinding efficiency of the present invention.

[0024] Moreover, the revolving grinding disc is provided with a grinding head track for adjusting the distance between the grinding head and the main driving shaft, and the grinding head is installed on the grinding head track. Therefore, the present invention can adjust the position of the grinding head on the grinding head track and select the optimal grinding radius according to the size of the actual workpiece being processed. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a three-dimensional structural schematic diagram of the variable pitch grinding machine of the present invention;

[0026] Figure 2 It is a cross-sectional structural schematic diagram of the planetary gear set mechanism of the variable pitch mill of the present invention;

[0027] Figure 3 It is a schematic cross-sectional structural diagram of the variable pitch grinding machine of the present invention. DETAILED DESCRIPTION

[0028] In order to make the objectives, technical solutions and advantages of the present invention more clear, the present invention will be further described in detail below with reference to the accompanying drawings.

[0029] See also Figure 1 , 2 3. The present invention provides a variable pitch grinding machine, comprising a plurality of grinding heads 1, a planetary gear set mechanism 2 for driving the grinding heads 1 to rotate, and a driving device 3, wherein the planetary gear set mechanism comprises a planetary frame 21, a planetary gear shaft 22, and a sun gear 23 meshing with the planetary gear shaft, and the planetary gear shaft 22 is provided with a linkage assembly 4 for driving the grinding heads 1;

[0030] The planetary frame 21 is provided with a revolving grinding disc 5 and a main driving shaft 24 connected to the driving device 3, the revolving grinding disc 5 is provided with a grinding head track 51 for adjusting the distance between the grinding head 1 and the main driving shaft 24, and the grinding head 1 is installed on the grinding head track 51;

[0031] The driving device 3 drives the planetary frame 21 to rotate through the main driving shaft 24 , so that the grinding head 1 disposed on the planetary frame 21 revolves around the main driving shaft 24 while being driven by the planetary gear shaft 22 .

[0032] Specifically, the grinding head 1 includes a rotating disk 11 for mounting a grinding piece, a grinding head drive shaft 12 and a rotating shaft base 13 for driving the rotating disk 11 to rotate, the grinding head drive shaft 12 is mounted on the rotating shaft base 13, one end of the grinding head drive shaft 12 is connected to the rotating disk 11, and the other end is connected to the linkage assembly 4. It should be noted that the rotating disk 11 can be equipped with suitable grinding pieces according to the actual plate material being processed, such as various types of grinding and polishing tools, brushes of various hardness materials, etc.

[0033] Each of the grinding heads 1 is equipped with the grinding head track 51, and the two ends of the grinding head track 51 are respectively the farthest end and the nearest end; the grinding head 1 moves along the grinding head track 51 from the farthest end to the nearest end, and the distance between the grinding head 1 and the main drive shaft 24 gradually decreases. Therefore, when the present invention needs to be adjusted according to the size of the actual workpiece, the installation position of the grinding head 1 can be moved, so as to change the radius of the new grinding 1, so as to improve the applicability of the present invention.

[0034] In terms of changing the installation position of the grinding head 1, the grinding head track 51 is a long hole opened on the revolving grinding disc 5, the rotating shaft base 13 is fixedly installed on the upper surface of the revolving grinding disc 5, and the grinding head drive shaft 12 inside it passes through the long hole to grind the workpiece under the revolving grinding disc 5. By opening a hole in the revolving disc to form a grinding head track, the dead weight of the revolving grinding disc can be effectively reduced, and the bearing burden of the revolving grinding disc can be reduced at the same time.

[0035] Moreover, in order to conveniently control the revolution radius of each grinding head, a plurality of positioning holes (not all shown in the figure) for controlling the installation position of the grinding head are provided along both sides of the grinding head track 51. Each grinding head can be installed according to the preset position of the positioning hole.

[0036] The linkage assembly 4 includes a first transmission wheel 41 mounted on the planetary gear shaft 22, a second transmission wheel 42 mounted on the grinding head drive shaft 12, and a synchronous transmission member 43, wherein the first transmission wheel 41 drives the second transmission wheel 42 to rotate through the synchronous transmission member 43. It should be noted that the synchronous transmission member 43 can be a gear set, a transmission chain, a synchronous belt, a transmission shaft, etc. Based on weight, transmission efficiency, structural simplicity, and convenience of maintenance and replacement, the synchronous transmission member is preferably a synchronous belt.

[0037] Furthermore, due to the setting of the synchronous transmission member, which is generally a fixed length value, when the distance between the grinding head 1 and the main driving shaft 24 is changed, it is generally necessary to replace the synchronous rotating member with the corresponding transmission length.

[0038] Therefore, in order to avoid the replacement and matching of synchronous rotating parts, the working efficiency of the present invention is improved, and the maintenance difficulty and labor intensity of workers are reduced. The trajectory of the grinding head track 51 is an arc with the planetary gear shaft 22 as the center. When the grinding head 1 moves along the grinding head track 51 of the arc trajectory, the distance between the grinding head 1 and the main drive shaft 24 can be gradually changed while keeping the transmission distance between the grinding head drive shaft 12 and the planetary gear shaft 22 unchanged, that is, the grinding radius of the present invention is changed. Preferably, the farthest ends of each of the tracks are located on the same concentric circle; the nearest ends of each of the tracks are located on the same concentric circle.

[0039] Based on the use of the present invention, a large amount of powder or large particle waste of the workpiece will be generated during its operation. In order to prevent it from flying into the planetary gear set mechanism and affecting the meshing transmission between its gears, the planetary frame 21 is a shell structure, and the gear parts of the sun gear 23 and the planetary gear shaft 22 are arranged in the shell structure to prevent the internal core transmission parts from being contaminated and eroded, and also to extend the maintenance cycle.

[0040] The mill also includes a traction sleeve 6 for connecting external equipment and a flange 61 connected to the traction sleeve 6, the traction sleeve 6 is arranged on the main drive shaft 24, and the sun gear 23 is connected to the bottom of the traction sleeve 7. Therefore, the present invention can be loaded on a production line or other swing arms and mechanical arms through the flange 61.

[0041] In order to reduce the friction between the traction sleeve and the planetary frame, a bearing is provided between the traction sleeve and the planetary frame. Similarly, the bottom end of the main drive shaft is sleeved with a bearing to reduce the friction between it and the planetary frame.

[0042] The above is a preferred embodiment of the present invention. It should be pointed out that a person skilled in the art can make several improvements and modifications without departing from the principle of the present invention. These improvements and modifications are also considered to be within the scope of protection of the present invention.

Claims

1. A variable pitch mill, characterized in that: It comprises a plurality of grinding heads, a planetary gear set mechanism and a driving device for driving the grinding heads to rotate, wherein the planetary gear set mechanism comprises a planetary frame, a planetary gear shaft and a sun gear meshed with the planetary gear shaft, and the planetary gear shaft is provided with a linkage assembly for driving the grinding heads; The planetary frame is provided with a revolving grinding disc and a main driving shaft connected to the driving device, the revolving grinding disc is provided with a grinding head track for adjusting the distance between the grinding head and the main driving shaft, and the grinding head is installed on the grinding head track; The driving device drives the planetary frame to rotate through the main driving shaft, so that the grinding head arranged on the planetary frame revolves around the main driving shaft while being driven by the planetary gear shaft; The track of the grinding head track is an arc with the planetary gear shaft as the center; Each of the grinding heads is equipped with the grinding head track, and the two ends of the grinding head track are respectively the farthest end and the nearest end; The grinding head moves along the grinding head track from the farthest end to the nearest end, and the distance between the grinding head and the main driving shaft gradually decreases; The grinding head comprises a rotating disk for mounting the grinding piece, a grinding head driving shaft and a rotating shaft base for driving the rotating disk to rotate, the grinding head driving shaft is mounted on the rotating shaft base, one end of the grinding head driving shaft is connected to the rotating disk, and the other end is connected to the linkage assembly; The linkage assembly comprises a first transmission wheel mounted on the planetary gear shaft, a second transmission wheel mounted on the grinding head drive shaft and a synchronous transmission member, and the first transmission wheel drives the second transmission wheel to rotate through the synchronous transmission member; The farthest ends of the grinding head tracks are all located on the same concentric circle; The nearest ends of the grinding head tracks are all located on the same concentric circle.

2. The variable pitch mill according to claim 1, characterized in that: The grinding head track is a long hole of the revolving grinding disc.

3. The variable pitch mill according to claim 1 or 2, characterized in that: A plurality of positioning holes for controlling the installation position of the grinding head are arranged on both sides of the grinding head track.

4. The variable pitch mill according to claim 1, characterized in that: The planetary frame is a shell structure, and the gear parts of the sun gear and the planetary gear shaft are arranged in the shell structure; The grinding mill further comprises a traction sleeve for connecting external equipment, the traction sleeve is sleeved on the main driving shaft, and the sun gear is connected to the bottom of the traction sleeve.

5. The variable pitch mill according to claim 3, characterized in that: The driving device includes a motor and a reduction box, the main driving shaft is mounted on the reduction box, and the motor drives the main driving shaft through the reduction box.

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