Gearbox anti-backlash structure of high-speed metal circular sawing machine

Abstract

The utility model provides a high-speed metal circular sawing machine gearbox anti-backlash structure which comprises an input shaft, an intermediate gear shaft, an output shaft, an anti-backlash shaft, a first anti-backlash gear, a first pre-tightening elastic piece and a second pre-tightening elastic piece. A first change gear and a second change gear are arranged on the intermediate gear shaft, and the first change gear is meshed with the input gear; the first anti-backlash gear is arranged on the first change gear in a sliding manner, and the first anti-backlash gear is meshed with the input gear; the first pre-tightening elastic piece is connected between the first anti-backlash gear and the first change gear in an abutting mode. An output gear is arranged on the output shaft, and the output gear is meshed with the second change gear; a second anti-backlash gear and a third anti-backlash gear are arranged on the anti-backlash shaft, the second anti-backlash gear is meshed with the input shaft, and the third anti-backlash gear is meshed with the output gear; the second pre-tightening elastic piece is connected between the anti-backlash shaft and the gear box in an abutting mode. The gap between the gears can be effectively and automatically eliminated, and the cutting efficiency and precision are guaranteed.

Description

TECHNICAL FIELD

[0001] The utility model relates to circular saw machine technical field especially relates to a high -speed metal circular saw machine gear box gap eliminating structure. BACKGROUND

[0002] The high-speed metal circular saw machine gear box is a core component of the circular saw machine. In the use of the circular saw machine, the machine is driven by the motor to drive the gear box to cut the metal at high speed and high precision. The gear box is the power and load transmission body in the cutting. The gear and the gap between the gears of the gear box are the guarantee of the cutting efficiency and precision of the circular saw machine. In the gear transmission, there is a gap between the gears. After a long time of load operation, the gears will also be worn out. In the metal cutting, the cutting resistance will change irregularly. If the gap between the gears is too large, the saw blade will vibrate back and forth and cannot cut normally and uniformly. Most of the magnetic powder clutches used on the market can eliminate the gap between the gears. However, the magnetic powder clutch cannot effectively and stably eliminate the gap between the gears. The service life of the magnetic powder clutch is short. The magnetic powder needs to be added and the body needs to be replaced regularly, which reduces the service life of the saw blade, affects the cutting efficiency and precision, and increases the use cost.

[0003] Therefore, it is necessary to provide a high-speed metal circular saw machine gear box gap eliminating structure that can effectively and automatically eliminate the gap between the gears. UTILITY MODEL CONTENTS

[0004] The utility model discloses a high-speed metal circular saw machine gear box gap eliminating structure that can effectively and automatically eliminate the gap between the gears.

[0005] The utility model provides a high -speed metal circular saw machine gear box gap eliminating structure, including input shaft, intermediate gear shaft, output shaft, gap eliminating shaft, first gap eliminating gear, first pre -tight elastic member and second pre -tight elastic member, be equipped with input gear on the input shaft, be equipped with first speed change gear and second speed change gear in the intermediate gear shaft is intervally, first speed change gear is engaged with input gear, first gap eliminating gear is coaxially arranged on first speed change gear, first gap eliminating gear is engaged with input gear, first pre -tight elastic member is along the sliding direction of first gap eliminating gear and is located between first gap eliminating gear and first speed change gear, and first pre -tight elastic member has first elastic force that keeps first speed change gear and output gear engage, be equipped with output gear on the output shaft, output gear is engaged with second speed change gear, gap eliminating shaft is movably arranged on gear box along its axial direction, second gap eliminating gear and third gap eliminating gear are intervally equipped on the gap eliminating shaft, second gap eliminating gear is engaged with input shaft, third gap eliminating gear is engaged with output gear, second pre -tight elastic member is along the moving direction of gap eliminating shaft and is located between one end of gap eliminating shaft and gear box, and second pre -tight elastic member has second elastic force for keeping second gap eliminating gear on gap eliminating shaft and input gear engage, input gear, first speed change gear, second speed change gear, first gap eliminating gear, output gear, second gap eliminating gear and third gap eliminating gear are all cylindrical helical gear.

[0006] Preferably, the high-speed metal circular saw machine gear box gap eliminating structure further comprises a belt pulley, one end of the input shaft is fixedly connected with the belt pulley.

[0007] Preferably, the first speed change gear comprises a gear part and a protruding shaft part, the gear part and the protruding shaft part are coaxially connected and sleeved on the intermediate gear shaft, the gear part is engaged with the input gear, and the first gap eliminating gear is coaxially arranged on the gear part.

[0008] Preferably, the high-speed metal circular saw machine gear box gap eliminating structure further comprises a limiting baffle, the limiting baffle is connected with the protruding shaft part and is used for limiting the sliding stroke of the first gap eliminating gear.

[0009] Preferably, a positioning column is arranged on the side of the gear part, and the first pre-tight elastic member is sleeved on the positioning column.

[0010] Preferably, the first pre-tight elastic member is a butterfly-shaped pre-tight spring.

[0011] Preferably, the high-speed metal circular saw machine gear box gap eliminating structure further comprises a saw blade, one end of the output shaft is fixedly connected with the saw blade.

[0012] Preferably, one end of the backlash-eliminating shaft is provided with a guide sleeve, and one end of the second pre-tightening elastic member passes through the guide sleeve and abuts against the guide sleeve.

[0013] Preferably, the input shaft, the intermediate gear shaft, the output shaft, and the backlash-eliminating shaft are arranged in parallel and disposed within the gearbox.

[0014] Preferably, the helical tooth direction of the input gear is opposite to the helical tooth direction of the first transmission gear, the helical tooth direction of the first transmission gear is the same as the helical tooth direction of the first backlash-free gear, the helical tooth direction of the first transmission gear is opposite to the helical tooth direction of the second transmission gear, the helical tooth direction of the second transmission gear is opposite to the helical tooth direction of the output gear, the helical tooth direction of the second backlash-free gear is opposite to the helical tooth direction of the input gear, the helical tooth direction of the second backlash-free gear is opposite to the helical tooth direction of the third backlash-free gear, and the helical tooth direction of the third backlash-free gear is opposite to the helical tooth direction of the output gear.

[0015] Compared with the prior art, the high-speed metal circular saw gearbox backlash elimination structure of this utility model eliminates the magnetic powder clutch. By adding a first backlash elimination gear that meshes with the input gear on the first transmission gear, and setting a first pre-tightening elastic element between the first backlash elimination gear and the first transmission gear, this utility model also adds a backlash elimination shaft, on which a second backlash elimination gear and a third backlash elimination gear are set. The second backlash elimination gear meshes with the input shaft, and the third backlash elimination gear meshes with the output gear. Therefore, when the input shaft is driven to rotate, the power is transmitted to the output shaft through the first transmission gear, the second transmission gear, and the output gear, and also through the second backlash elimination gear, the third backlash elimination gear, and the output gear. During the gear operation, the backlash between all gears is eliminated by the first backlash elimination gear, the second backlash elimination gear, and the third backlash elimination gear through the elastic force of the first pre-tightening elastic element and the second pre-tightening elastic element, respectively, thereby achieving smooth transmission without backlash between gears. Therefore, the gearbox backlash elimination structure of the high-speed metal circular saw of this invention can effectively and automatically eliminate the gap between gears, eliminating the need for long-term addition and replacement of magnetic powder, thus ensuring cutting efficiency and precision, and reducing operating costs. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of the gearbox backlash elimination structure of the high-speed metal circular saw of this utility model.

[0017] Figure 2 This is a front view of the backlash elimination structure of the gearbox of the high-speed metal circular saw of this utility model.

[0018] Figure 3This is a structural diagram of the intermediate gear set of the gearbox backlash elimination structure of the high-speed metal circular saw of this utility model. Detailed Implementation

[0019] To explain the technical content and structural features of this utility model in detail, the following description is provided in conjunction with the embodiments and accompanying drawings.

[0020] Please see Figures 1 to 3 The high-speed metal circular saw gearbox backlash elimination structure 100 of this utility model includes an input shaft 1, an intermediate gear shaft 2, an output shaft 3, a backlash elimination shaft 4, a first backlash elimination gear 5, a first pre-tightening elastic element 6, and a second pre-tightening elastic element 7. An input gear 11 is mounted on the input shaft 1; a first speed-changing gear 21 and a second speed-changing gear 22 are spaced apart on the intermediate gear shaft 2, with the first speed-changing gear 21 meshing with the input gear 11; the first backlash elimination gear 5 is slidably mounted coaxially on the first speed-changing gear 21, and meshes with the input gear 11; the first pre-tightening elastic element 6 abuts against the first backlash elimination gear 5 and the first speed-changing gear 21 along the sliding direction of the first backlash elimination gear 5, and the first pre-tightening elastic element 6 has a first elastic force to maintain the meshing of the first speed-changing gear 21 and the output gear 31; the output shaft 3... An output gear 31 is provided, which meshes with a second speed-changing gear 22. A backlash-eliminating shaft 4 is movably mounted on a gearbox (not shown) along its axial direction. A second backlash-eliminating gear 41 and a third backlash-eliminating gear 42 are provided on the backlash-eliminating shaft 4 at intervals. The second backlash-eliminating gear 41 meshes with an input shaft 1, and the third backlash-eliminating gear 42 meshes with an output gear 31. A second preload elastic member 7 abuts against one end of the backlash-eliminating shaft 4 and the gearbox along the moving direction of the backlash-eliminating shaft 4, and the second preload elastic member 7 has a second elastic force for maintaining the meshing of the second backlash-eliminating gear 41 on the backlash-eliminating shaft 4 with the input gear 11. The input gear 11, the first speed-changing gear 21, the second speed-changing gear 22, the first backlash-eliminating gear 5, the output gear 31, the second backlash-eliminating gear 41, and the third backlash-eliminating gear 42 are all cylindrical helical gears.

[0021] This invention adds a first backlash-eliminating gear 5 to the first transmission gear 21, meshing with the input gear 11, and sets a first pre-tightening elastic element 6 between the first backlash-eliminating gear 5 and the first transmission gear 21. Furthermore, this invention adds a backlash-eliminating shaft 4, on which a second backlash-eliminating gear 41 and a third backlash-eliminating gear 42 are set. The second backlash-eliminating gear 41 meshes with the input shaft 1, and the third backlash-eliminating gear 42 meshes with the output gear 31. Therefore, when the input shaft 1 is driven to rotate, the power is transmitted to the output shaft 3 through the first transmission gear 21, the second transmission gear 22, and the output gear 31, and also through the second backlash-eliminating gear 41, the third backlash-eliminating gear 42, and the output gear 31. During gear operation, the backlash between all gears is eliminated by the elastic force of the first backlash-eliminating gear 5, the second backlash-eliminating gear 41, and the third backlash-eliminating gear 42 through the elastic force of the first pre-tightening elastic element 6 and the second pre-tightening elastic element 7, thereby achieving smooth, backlash-free transmission between gears.

[0022] Please see Figure 1 and Figure 2 In one embodiment, the high-speed metal circular saw gearbox backlash elimination structure 100 of this utility model further includes a pulley 8, and one end of the input shaft 1 is fixedly connected to the pulley 8. Furthermore, the pulley 8 can be driven to rotate by a motor mechanism, thereby driving the input shaft 1 to rotate.

[0023] Please see Figure 2 and Figure 3 In one embodiment, the first transmission gear 21 includes a gear portion 211 and a cam shaft portion 212. The gear portion 211 and the cam shaft portion 212 are coaxially connected and sleeved on the intermediate gear shaft 2. The gear portion 211 meshes with the input gear 11, and the first backlash-eliminating gear 5 is coaxially slidably disposed on the gear portion 211. Further, the backlash-eliminating structure 100 of the high-speed metal circular saw gearbox of this invention also includes a limiting baffle 212a. The limiting baffle 212a is connected to the cam shaft portion 212 and is used to limit the sliding stroke of the first backlash-eliminating gear 5. There is space between the limiting baffle 212a and the gear portion 211 for the first backlash-eliminating gear 5 to slide and adjust.

[0024] Please see Figure 3 In one embodiment, a positioning post 211a is provided on the side of the gear part 211, and a first pre-tightening elastic member 6 is sleeved on the positioning post 211a.

[0025] Please see Figure 3 In one embodiment, the first preload elastic element 6 is a butterfly preload spring, but it is not limited thereto.

[0026] Please see Figure 1 and Figure 2In one embodiment, the high-speed metal circular saw gearbox backlash elimination structure 100 of the present invention further includes a saw blade 9, and one end of the output shaft 3 is fixedly connected to the saw blade 9.

[0027] Please see Figure 1 and Figure 2 In one embodiment, one end of the backlash-eliminating shaft 4 is provided with a guide sleeve 43, and one end of the second pre-tightening elastic member 7 passes through the guide sleeve 43 and abuts against the guide sleeve 43.

[0028] Please see Figure 1 and Figure 2 In this embodiment, the input shaft 1, intermediate gear shaft 2, output shaft 3, and backlash-eliminating shaft 4 are arranged in parallel and disposed within the gearbox. Specifically, the helical tooth direction of the input gear 11 is opposite to that of the first transmission gear 21, the helical tooth direction of the first transmission gear 21 is the same as that of the first backlash-eliminating gear 5, the helical tooth direction of the first transmission gear 21 is opposite to that of the second transmission gear 22, the helical tooth direction of the second transmission gear 22 is opposite to that of the output gear 31, the helical tooth direction of the second backlash-eliminating gear 41 is opposite to that of the input gear 11, the helical tooth direction of the second backlash-eliminating gear 41 is opposite to that of the third backlash-eliminating gear 42, and the helical tooth direction of the third backlash-eliminating gear 42 is opposite to that of the output gear 31.

[0029] Combination Figures 1 to 3 The specific working principle of the high-speed metal circular saw gearbox backlash elimination structure 100 of this utility model is as follows:

[0030] During installation, the output shaft 3 is fixed. External force is used to mesh the second backlash-eliminating gear 41 and the third backlash-eliminating gear 42 in opposite directions. Then, the second backlash-eliminating gear 41 is locked, eliminating any gap between it and the input gear 11 on the input shaft 1, and eliminating any gap between the third backlash-eliminating gear 42 and the output gear 31 on the output shaft 3. Under the second elastic force of the pre-tightening elastic element 7, the backlash-eliminating shaft 4 is pushed to the right. When the backlash-eliminating shaft 4 is pushed, it completely eliminates the gap between the input gear 11 on the input shaft 1 and the second backlash-eliminating gear 41. When there is a gap between the first gear 21 on the intermediate gear shaft 2 and the input gear 11 on the input shaft 1, under the first elastic force of the first pre-tightening elastic element 6, the first backlash-eliminating gear 5 will move to the left relative to the first gear 21. Since the helical teeth of the input gear 11 and the first backlash-eliminating gear 5 are opposite in direction, the input shaft 1 will rotate until the first gear 21 on the intermediate gear shaft 2 and the input gear 11 on the input shaft 1... 1. No backlash: When there is a backlash between the second gear 22 and the output gear 31 on the output shaft 3, the force balance on both sides of the input shaft 1 is broken. Since the second preload elastic element 7 always has a rightward thrust on the backlash-eliminating shaft 4, the backlash-eliminating shaft 4 moves slightly to the right and drives the input gear 11 to rotate along with the input shaft 1 through the second backlash-eliminating gear 41. Then, it drives the intermediate gear shaft 2 to rotate through the first gear 21. The rotation of the intermediate gear shaft 2 will drive the second gear 22 to rotate, thereby eliminating the backlash between the second gear 22 and the output gear 31 on the output shaft 3.

[0031] Because the loads on the input shaft 1 and the output shaft 3 are different, the wear of the second gear 22 and the third backlash-free gear 42, which mesh with the output gear 31 of the output shaft 3, and the first gear 21 and the second backlash-free gear, which mesh with the input gear 11 of the input shaft 1, will be different. There will also be slight deformation and displacement. The first backlash-free gear 5 will be opened by the first elastic force of the first pre-tightening elastic member 6, so as to produce a smaller gap.

[0032] In summary, when the input shaft 1 rotates, the power is transmitted to the output shaft 3 via the first speed-changing gear 21, the second speed-changing gear 22, and the output gear 31. It is also transmitted to the output shaft 3 via the second backlash-eliminating gear 41, the third backlash-eliminating gear 42, and the output gear 31. During gear operation, the backlash between all gears is eliminated by the elastic forces of the first backlash-eliminating gear 5, the second backlash-eliminating gear 41, and the third backlash-eliminating gear 42 through the elastic forces of the first pre-tightening elastic element 6 and the second pre-tightening elastic element 7, thereby achieving smooth, backlash-free transmission between gears. Therefore, the backlash-eliminating structure 100 of the high-speed metal circular saw gearbox of this invention can effectively and automatically eliminate the backlash between gears, improve the stability of power transmission, eliminate the need for long-term addition and replacement of magnetic powder, ensure cutting efficiency and accuracy, and reduce operating costs.

[0033] The above-disclosed examples are merely preferred embodiments of the present utility model and should not be construed as limiting the scope of the present utility model. Therefore, any equivalent variations made in accordance with the claims of the present utility model shall fall within the scope of the present utility model.

Claims

1. A backlash-eliminating structure for a high-speed metal circular saw gearbox, characterized in that, It includes an input shaft, an intermediate gear shaft, an output shaft, a backlash-free shaft, a first backlash-free gear, a first preload elastic element, and a second preload elastic element. The input shaft is provided with an input gear. The intermediate gear shaft is provided with a first speed-changing gear and a second speed-changing gear at intervals. The first speed-changing gear meshes with the input gear. The first backlash-eliminating gear is slidably mounted coaxially on the first transmission gear, and meshes with the input gear; the first preload elastic member abuts against the first backlash-eliminating gear and the first transmission gear along the sliding direction of the first backlash-eliminating gear, and the first preload elastic member has a first elastic force to maintain the meshing of the first transmission gear and the output gear; an output gear is provided on the output shaft, and the output gear meshes with the second transmission gear; the backlash-eliminating shaft is movably mounted on the gearbox along its axial direction, and second backlash-eliminating teeth are provided at intervals on the backlash-eliminating shaft. The gearbox includes a first gear, a second gear, and a third gear. The second gear meshes with the input shaft, and the third gear meshes with the output gear. A second preload elastic member abuts against one end of the backlash shaft and the gearbox along the moving direction of the backlash shaft, and the second preload elastic member has a second elastic force for maintaining the meshing of the second gear on the backlash shaft with the input gear. The input gear, the first gear, the second gear, the first gear, the output gear, the second gear, and the third gear are all helical cylindrical gears.

2. The backlash-eliminating structure of the gearbox of the high-speed metal circular saw machine according to claim 1, characterized in that, It also includes a pulley, with one end of the input shaft fixedly connected to the pulley.

3. The backlash-eliminating structure of the gearbox for a high-speed metal circular saw according to claim 1, characterized in that, The first gear includes a gear portion and a cam shaft portion. The gear portion and the cam shaft portion are coaxially connected and sleeved on the intermediate gear shaft. The gear portion meshes with the input gear. The first backlash-free gear is coaxially slidably disposed on the gear portion.

4. The backlash-eliminating structure of the gearbox for a high-speed metal circular saw according to claim 3, characterized in that, It also includes a limiting baffle, which is connected to the convex shaft portion and is used to limit the sliding stroke of the first backlash-free gear.

5. The backlash-eliminating structure of the gearbox for a high-speed metal circular saw according to claim 3, characterized in that, The gear part is provided with a positioning post on its side, and the first pre-tightening elastic element is sleeved on the positioning post.

6. The backlash-eliminating structure of the gearbox for a high-speed metal circular saw according to claim 1, characterized in that, The first pre-tensioning elastic element is a butterfly pre-tensioning spring.

7. The backlash-eliminating structure of the gearbox for a high-speed metal circular saw according to claim 1, characterized in that, It also includes a saw blade, with one end of the output shaft fixedly connected to the saw blade.

8. The backlash-eliminating structure of the gearbox for a high-speed metal circular saw according to claim 1, characterized in that, One end of the backlash-eliminating shaft is provided with a guide sleeve, and one end of the second pre-tightening elastic member passes through the guide sleeve and abuts against the guide sleeve.

9. The backlash-eliminating structure of the gearbox for a high-speed metal circular saw according to claim 1, characterized in that, The input shaft, the intermediate gear shaft, the output shaft, and the backlash-eliminating shaft are arranged in parallel and housed within the gearbox.

10. The backlash-eliminating structure of the gearbox of a high-speed metal circular saw according to claim 1, characterized in that, The direction of the helical teeth of the input gear is opposite to the direction of the helical teeth of the first gear. The direction of the helical teeth of the first gear is the same as the direction of the helical teeth of the first backlash-free gear. The direction of the helical teeth of the first gear is opposite to the direction of the helical teeth of the second gear. The direction of the helical teeth of the second gear is opposite to the direction of the helical teeth of the output gear. The direction of the helical teeth of the second gear is opposite to the direction of the helical teeth of the input gear. The direction of the helical teeth of the second gear is opposite to the direction of the helical teeth of the third gear. The direction of the helical teeth of the third gear is opposite to the direction of the helical teeth of the output gear.

Images