A precision commutator

Abstract

The present invention discloses a precision commutator, which includes a driving seat, a first output shaft and a second output shaft; a first bevel gear is also rotatably provided on the driving seat; a second bevel gear is fixedly sleeved on the first output shaft; the second bevel gear meshes with the first bevel gear; a switching component and a third bevel gear are slidably provided in the driving seat; a commutation transmission structure is provided between the third bevel gear and the second output shaft; the switching component is provided with a groove, and the third bevel gear is rotatably arranged in the groove; when the load increases, the contact area of the bevel gears is increased, the load is effectively dispersed, the pressure per unit area is reduced, thereby reducing wear and improving its load-bearing capacity and service life, so as to solve the problems of wear and efficiency existing in the prior art, thereby reducing the noise generated by transmission. When the load decreases, the wear of the third bevel gear is reduced and it is beneficial to reduce the wear of the first bevel gear, so as to extend the service life of the first bevel gear and the third bevel gear and reduce the maintenance cost.

Description

Technical Field

[0001] The present invention relates to the technical field of transmission devices, and more specifically, to a precision commutator. Background Art

[0002] In the field of mechanical transmission, right-angle reversing reducers play a crucial role. Traditional right-angle reversing reducers generally achieve power transmission by means of bevel gears. During their operation, whether in high-load or low-load conditions, the contact area between bevel gears always remains constant. However, in actual long-term use, due to inevitable wear, the service life of bevel gears is reduced. This phenomenon will cause the fitting accuracy between bevel gears to gradually decrease, and further cause the transmission accuracy of the entire right-angle reversing reducer to continuously decline. Moreover, due to the existence of wear problems, in order to ensure its normal operation and maintain a certain transmission accuracy, regular maintenance and overhaul work must be carried out on it, which undoubtedly increases the use cost and maintenance cost of the equipment. Summary of the Invention

[0003] The purpose of the present invention is to overcome the above-mentioned disadvantages, and provide a precision commutator. When the load increases, the contact area of the bevel gears is increased, the load is effectively dispersed, the pressure per unit area is reduced, thereby reducing wear, improving its load-bearing capacity and service life, so as to solve the wear and efficiency problems existing in the prior art, thereby reducing the noise generated by transmission. When the load decreases, only the second bevel gear meshes with the first bevel gear, reducing the wear of the third bevel gear and being conducive to reducing the wear of the first bevel gear, so as to extend the service life of the first bevel gear and the third bevel gear, and reduce the maintenance cost.

[0004] To achieve the above purpose, the specific solution of the present invention is as follows:

[0005] A precision commutator, including a transmission seat; the transmission seat is rotatably provided with a first output shaft and a second output shaft arranged coaxially; the transmission seat is also rotatably provided with a first bevel gear; the axis of the first bevel gear is perpendicular to the axes of the first output shaft and the second output shaft;

[0006] The first output shaft is fixedly sleeved with a second bevel gear; the second bevel gear meshes with the first bevel gear; a switching component and a third bevel gear are slidably arranged in the transmission seat; a reversing transmission structure is arranged between the third bevel gear and the second output shaft; the switching component is provided with a groove, and the third bevel gear is rotatably arranged in the groove.

[0007] Optionally, the switching component includes a slip ring slidably arranged on the first output shaft, a driving groove penetrating through the first output shaft, a locking block slidably arranged on the groove wall of the driving groove, and a push ring slidably arranged on the first output shaft;

[0008] A transmission shaft extends radially along the inner wall of the slip ring; the transmission shaft movably penetrates through the driving groove; the driving groove is V-shaped; the second output shaft is provided with a first sliding groove; the transmission shaft is provided with a slider in the first sliding groove; a first spring is arranged between the slider and the second output shaft; the locking block is located at the inflection point of the driving groove; the locking block is provided with a V-shaped opening; a second spring is arranged between the locking block and the first output shaft; a connecting arm extends from the side wall of the pushing ring; the connecting arm is provided with a groove; the connecting arm is slidably connected to the transmission seat.

[0009] Optionally, a connecting portion is provided at the inner end of the second output shaft; a connecting groove is provided at the inner end of the first output shaft; the connecting portion is rotatably arranged in the connecting groove; the first sliding groove is arranged on the connecting portion; the driving groove is communicated with the connecting groove.

[0010] Optionally, a limiting baffle for limiting the stroke of the pushing ring is provided on the outer wall of the connecting portion.

[0011] Optionally, the second output shaft is rotatably connected to the transmission seat through a flange; a connecting ring extends from the inner side of the flange; the third bevel gear is provided with an annular groove; the connecting ring is movably embedded in the annular groove.

[0012] Optionally, a second sliding groove is provided on the inner side of the flange; the connecting arm slidably extends into the second sliding groove.

[0013] Optionally, the commutation transmission structure includes a transmission gear rotatably arranged on the transmission seat, a first tooth structure arranged on the inner peripheral wall of the third bevel gear, and a second tooth structure arranged on the outer peripheral wall of the second output shaft; the transmission gear meshes with both the first tooth structure and the second tooth structure.

[0014] Optionally, a mounting shaft extends from the inner wall of the transmission seat; the transmission gear is rotatably sleeved on the mounting shaft.

[0015] Optionally, the outer wall of the first bevel gear is rotatably connected to the inner wall of the transmission seat through a first bearing.

[0016] Optionally, the outer wall of the second bevel gear is rotatably connected to the inner wall of the transmission seat through a second bearing.

[0017] The beneficial effects of the present invention are as follows: The present invention drives the third bevel gear to slide through the switching component, so that the third bevel gear meshes or disengages from the first bevel gear, thereby changing the contact area of the bevel gears; when the load increases, the switching component makes the third bevel gear mesh with the first bevel gear. At this time, both the second bevel gear and the third bevel gear mesh with the first bevel gear, thereby increasing the contact area of the bevel gears, effectively dispersing the load, reducing the pressure per unit area, thereby reducing wear, improving its load-bearing capacity and service life, so as to solve the problems of wear and efficiency in the prior art, thereby reducing the noise generated by transmission; when the load decreases, the switching component makes the third bevel gear disengage from the first bevel gear. At this time, only the second bevel gear meshes with the first bevel gear, reducing the wear of the third bevel gear and the wear on the first bevel gear, so as to extend the service life of the first bevel gear and the third bevel gear and reduce the maintenance cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a perspective view of the present invention;

[0019] Figure 2 is a schematic cross-sectional view of the present invention when the third bevel gear and the first bevel gear are not meshed;

[0020] Figure 3 is Figure 2 a partial enlarged schematic view of part A in

[0021] Figure 4 is a schematic cross-sectional view of the present invention when the third bevel gear and the first bevel gear are meshed;

[0022] Figure 5 is an exploded schematic view of the present invention;

[0023] Figure 6 is a schematic view of a part of the structure of the present invention;

[0024] Figure 7 is a schematic view of the structure of the first output shaft of the present invention;

[0025] Figure 8 is a schematic view of the structure of the switching component of the present invention;

[0026] Figure 9 is a schematic view of the structure of the locking block of the present invention;

[0027] Figure 10 is a schematic view of the structure of the second output shaft of the present invention;

[0028] Figure 11 is a schematic view of the structure of the third bevel gear of the present invention;

[0029] Description of reference numerals: 1, drive seat; 11, flange; 111, connecting ring; 112, second chute; 12, mounting shaft; 2, first output shaft; 21, connecting groove; 3, second output shaft; 31, first chute; 32, connecting portion; 33, limiting baffle; 4, first bevel gear; 5, second bevel gear; 61, slip ring; 611, transmission shaft; 612, slider; 613, first spring; 62, drive groove; 63, locking block; 631, V-shaped opening; 632, second spring; 633, inclined surface; 64, pushing ring; 641, connecting arm; 642, groove; 7, third bevel gear; 71, circular ring groove; 81, transmission gear; 82, first tooth structure; 83, second tooth structure; 9, first bearing; 10, second bearing. Detailed implementation manners

[0030] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments, and the scope of implementation of the present invention is not limited thereto.

[0031] As Figures 1 to 11 shown, a precision commutator in this embodiment includes a drive seat 1; a first output shaft 2 and a second output shaft 3 which are coaxially arranged are rotatably provided on the drive seat 1; a first bevel gear 4 is also rotatably provided on the drive seat 1; the axis of the first bevel gear 4 is perpendicular to the axes of the first output shaft 2 and the second output shaft 3; a second bevel gear 5 is fixedly sleeved on the first output shaft 2; the second bevel gear 5 meshes with the first bevel gear 4; a switching assembly and a third bevel gear 7 are slidably provided in the drive seat 1; a commutation transmission structure is provided between the third bevel gear 7 and the second output shaft 3; the switching assembly is provided with a groove 642, and the third bevel gear 7 is rotatably arranged in the groove 642.

[0032] Specifically, the third bevel gear 7 is driven by the switching assembly to slide, so that the third bevel gear 7 meshes with or disengages from the first bevel gear 4, thereby changing the contact area of the bevel gears; when the load increases, the switching assembly makes the third bevel gear 7 mesh with the first bevel gear 4, as Figure 4 shown, at this time, both the second bevel gear 5 and the third bevel gear 7 mesh with the first bevel gear 4, thereby increasing the contact area of the bevel gears, effectively dispersing the load, reducing the pressure per unit area, thereby reducing wear, improving its load-bearing capacity and service life, so as to solve the problems of wear and efficiency existing in the prior art, thereby reducing the noise generated by transmission; when the load decreases, the switching assembly makes the third bevel gear 7 disengage from the first bevel gear 4, as Figure 2 shown, at this time, only the second bevel gear 5 meshes with the first bevel gear 4, reducing the wear of the third bevel gear 7 and the wear on the first bevel gear 4, so as to extend the service life of the first bevel gear 4 and the third bevel gear 7, so as to reduce the maintenance cost.

[0033] In this embodiment, by providing a commutation transmission structure, when the third bevel gear 7 meshes with the first bevel gear 4, the third bevel gear 7 can synchronously drive the second output shaft 3 to rotate, so as to achieve torque transmission.

[0034] As Figures 2 to 10 shown, in a precision commutator according to this embodiment, in some embodiments, the switching assembly includes a slip ring 61 slidably disposed on the first output shaft 2, a drive groove 62 penetrating through the first output shaft 2, a locking block 63 slidably disposed on the groove wall of the drive groove 62, and a push ring 64 slidably disposed on the first output shaft 2;

[0035] A transmission shaft 611 extends radially along the inner wall of the slip ring 61; the transmission shaft 611 movably penetrates through the drive groove 62; the drive groove 62 is V-shaped; the second output shaft 3 is provided with a first chute 31; the transmission shaft 611 is provided with a slider 612 in the first chute 31; a first spring 613 is disposed between the slider 612 and the second output shaft 3; the locking block 63 is located at the inflection point of the drive groove 62; the locking block 63 is provided with a V-shaped opening 631; a second spring 632 is disposed between the locking block 63 and the first output shaft 2; a connecting arm 641 extends from the side wall of the push ring 64; the connecting arm 641 is provided with a groove 642; the connecting arm 641 is slidably connected to the transmission base 1. In this embodiment, the locking block 63 is provided with inclined surfaces 633 on the outer side walls at both ends of the V-shaped opening 631, so that the transmission shaft 611 can press the locking block 63 through the inclined surfaces 633 and snap into the V-shaped opening 631. In this embodiment, the stiffness of the first spring 613 is set to be greater than the stiffness of the second spring 632, so as to facilitate the reset of the slip ring 61.

[0036] Specifically, initially, the transmission shaft 611 is located within the V-shaped opening 631 of the locking block 63. The locking block 63 locks the transmission shaft 611 under the elastic force of the second spring 632, and the opening of the V-shaped opening 631 faces away from the second output shaft 3. When the load connected to the second output shaft 3 increases to a certain extent, the torque between the first output shaft 2 and the second output shaft 3 increases. At this time, when the first output shaft 2 drives the second output shaft 3 to rotate, since the locking block 63 needs to overcome a greater force to drive the transmission shaft 611 to rotate, relative movement occurs between the transmission shaft 611 and the locking block 63. The transmission shaft 611 presses the locking block 63, causing the second spring 632 to compress. The transmission shaft 611 disengages from the V-shaped opening 631 and relatively moves along one end of the driving groove 62. At this time, due to the relative rotation between the first output shaft 2 and the transmission shaft 611, the first output shaft 2 applies a thrust to the transmission shaft 611 through the driving groove 62, causing the slip ring 61 to slide relative to the first output shaft 2. The slip ring 61 drives the push ring 64 to slide, and the push ring 64 drives the third bevel gear 7 to slide through the groove 642, so that the third bevel gear 7 slides to engage with the first bevel gear 4. The third bevel gear 7 synchronously transmits the torque input through the first bevel gear 4, and the third bevel gear 7 drives the second output shaft 3 to rotate through the reversing transmission structure, thereby effectively dispersing the load and reducing wear. At the same time, the slider 612 slides within the first chute 31, and the first spring 613 is compressed;

[0037] When the load connected to the second output shaft 3 decreases, the first spring 613 pushes the slider 612 to reset. The slider 612 drives the transmission shaft 611 to reset to the inflection point of the driving groove 62 and presses the locking block 63 until the transmission shaft 611 enters the V-shaped opening 631 again. The second spring 632 resets and pushes the locking block 63 to extend, locking the transmission shaft 611 at the inflection point of the driving groove 62 again, thus restoring the low-load state.

[0038] It should be noted that the degree of load increase can be determined by setting the stiffness of the second spring 632 to determine the switching timing; the greater the stiffness of the second spring 632, the greater the degree of load increase required to disengage the transmission shaft 611 from the V-shaped opening 631.

[0039] Such as Figure 2 、 Figures 4 to 7 、 Figure 10 As shown, in some embodiments of a precision commutator described in this embodiment, a connection portion 32 is provided at the inner end of the second output shaft 3; a connection groove 21 is provided at the inner end of the first output shaft 2; the connection portion 32 is rotatably disposed within the connection groove 21; a first chute 31 is provided on the connection portion 32; the driving groove 62 is communicated with the connection groove 21. In this embodiment, by providing the cooperation of the connection groove 21 and the connection portion 32, the assembly between the first output shaft 2 and the second output shaft 3 is facilitated.

[0040] Such as Figure 2 、Figures 4 to 6 , Figure 10 As shown in Figure 10 , in some embodiments of a precision commutator described in this embodiment, a limiting baffle 33 for limiting the stroke of the push ring 64 is provided on the outer wall of the connecting portion 32. By providing the limiting baffle 33 in this embodiment, the sliding stroke of the push ring 64 is limited, and the structural reliability is higher.

[0041] As Figure 1 , Figure 2 , Figures 4 to 6 As shown in Figure 1 , Figure 2 , and Figures 4 to 6 , in some embodiments of a precision commutator described in this embodiment, the second output shaft 3 is rotatably connected to the transmission base 1 through a flange 11; a connecting ring 111 extends inside the flange 11; the third bevel gear 7 is provided with an annular groove 71; the connecting ring 111 is movably embedded in the annular groove 71. By providing the flange 11 in this embodiment, the installation of the second output shaft 3 is facilitated. By providing the annular groove 71 in cooperation with the connecting ring 111, guidance and limitation are provided for the third bevel gear 7, making the third bevel gear 7 more stable during transmission.

[0042] As Figure 2 , Figure 4 and Figure 5 As shown in Figure 2 , Figure 4 , and Figure 5 , in some embodiments of a precision commutator described in this embodiment, a second chute 112 is provided inside the flange 11; the connecting arm 641 slides into the second chute 112. By providing the second chute 112 in cooperation with the connecting arm 641 in this embodiment, the rotational freedom of the push ring 64 is limited, so that the push ring 64 can only slide axially, and the structural reliability is better.

[0043] As Figures 2 to 6 As shown in Figures 2 to 6 , in some embodiments of a precision commutator described in this embodiment, the commutation transmission structure includes a transmission gear 81 rotatably provided on the transmission base 1, a first tooth structure 82 provided on the inner peripheral wall of the third bevel gear 7, and a second tooth structure 83 provided on the outer peripheral wall of the second output shaft 3; the transmission gear 81 meshes with both the first tooth structure 82 and the second tooth structure 83.

[0044] Specifically, when the third bevel gear 7 meshes with the first bevel gear 4, the first bevel gear 4 drives the third bevel gear 7 to rotate. The rotation directions of the third bevel gear 7 and the second bevel gear 5 are opposite. The third bevel gear 7 drives the transmission gear 81 to rotate in the same direction through the first tooth structure 82, and the transmission gear 81 drives the second output shaft 3 to rotate synchronously and reversely through the second tooth structure 83, so that the second output shaft 3 rotates under the combined drive of the first output shaft 2 and the third bevel gear 7, thereby increasing the contact area of the bevel gears, effectively dispersing the load, reducing the pressure per unit area, reducing wear, and improving its load-bearing capacity and service life.

[0045] As Figure 2 ,Figure 4 and Figure 5 As shown in Figure 5 , in some embodiments of a precision commutator described in this embodiment, an installation shaft 12 extends from the inner wall of the drive seat 1; the drive gear 81 is rotatably sleeved on the installation shaft 12. By providing the installation shaft 12 in this embodiment, the installation of the drive gear 81 is facilitated.

[0046] As Figure 2 , Figures 4 to 6 As shown in Figures 4 to 6 , in some embodiments of a precision commutator described in this embodiment, the outer wall of the first bevel gear 4 is rotatably connected to the inner wall of the drive seat 1 through a first bearing 9. By providing the first bearing 9 in this embodiment, the rotation of the first bevel gear 4 is more stable and has better stability, thus ensuring the transmission accuracy.

[0047] As Figure 2 , Figures 4 to 6 As shown in Figures 4 to 6 , in some embodiments of a precision commutator described in this embodiment, the outer wall of the second bevel gear 5 is rotatably connected to the inner wall of the drive seat 1 through a second bearing 10. By providing the second bearing 10 in this embodiment, the rotation of the second bevel gear 5 is more stable and has better stability, thus ensuring the transmission accuracy.

[0048] The above is only a preferred embodiment of the present invention. Therefore, any equivalent changes or modifications made according to the structures, features, and principles described in the scope of the present invention patent application are included in the protection scope of the present invention patent application.

Claims

1. A precision commutator, characterized in that: The transmission seat comprises a transmission seat; the transmission seat is rotatably provided with a first output shaft and a second output shaft which are coaxially arranged; the transmission seat is also rotatably provided with a first bevel gear; the axis of the first bevel gear is perpendicular to the axis of the first output shaft and the second output shaft; The first output shaft fixing sleeve is provided with a second bevel gear; the second bevel gear meshes with the first bevel gear; a switching assembly and a third bevel gear are slidably provided in the transmission seat; a reversing transmission structure is provided between the third bevel gear and the second output shaft; the switching assembly is provided with a groove, and the third bevel gear is rotatably provided in the groove; The switching assembly includes a slip ring slidably arranged on the first output shaft, a driving groove penetrating the first output shaft, a locking block slidably arranged on the groove wall of the driving groove, and a push ring slidably arranged on the first output shaft; A transmission shaft extends radially along the inner wall of the slip ring; the transmission shaft movably passes through the drive groove; the drive groove is V-shaped; the second output shaft is provided with a first slide groove; the transmission shaft is provided with a slider in the first slide groove; a first spring is provided between the slider and the second output shaft; a locking block is located at the inflection point of the drive groove; the locking block is provided with a V-shaped groove; a second spring is provided between the locking block and the first output shaft; a connecting arm extends from the side wall of the push ring; the connecting arm is provided with a groove; the connecting arm is slidably connected to the transmission seat.

2. A precision commutator according to claim 1, characterized in that: The inner end of the second output shaft is provided with a connecting portion; the inner end of the first output shaft is provided with a connecting groove; the connecting portion is rotatably arranged in the connecting groove; the first sliding groove is arranged on the connecting portion; and the driving groove is connected with the connecting groove.

3. A precision commutator according to claim 2, characterized in that: The outer wall of the connecting portion is provided with a limit baffle for limiting the travel of the push ring.

4. A precision commutator according to claim 1, characterized in that: The second output shaft is rotatably connected to the transmission seat through a flange; a connecting ring extends from the inner side of the flange; the third bevel gear is provided with a circular ring groove; and the connecting ring is movably embedded in the circular ring groove.

5. A precision commutator according to claim 4, characterized in that: A second sliding groove is provided on the inner side of the flange; the connecting arm slides into the second sliding groove.

6. A precision commutator according to claim 1, characterized in that: The reversing transmission structure includes a transmission gear rotatably arranged on a transmission seat, a first tooth structure arranged on the inner peripheral wall of the third bevel gear, and a second tooth structure arranged on the outer peripheral wall of the second output shaft; the transmission gear is meshed with both the first tooth structure and the second tooth structure.

7. A precision commutator according to claim 6, characterized in that: An installation shaft is extended from the inner wall of the transmission seat; the transmission gear is rotatably sleeved on the installation shaft.

8. The precision commutator according to claim 1, characterized in that: The outer wall of the first bevel gear is rotatably connected to the inner wall of the transmission seat through a first bearing.

9. The precision commutator according to claim 1, characterized in that: The outer wall of the second bevel gear is rotatably connected to the inner wall of the transmission seat through a second bearing.

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