Precise commutator

Abstract

The invention discloses a precise commutator which comprises a transmission seat, a first output shaft and a second output shaft. A first bevel gear is rotationally arranged on the transmission seat; the first output shaft is fixedly sleeved with a second bevel gear. The second bevel gear is meshed with the first bevel gear; a switching assembly 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 assembly is provided with a groove, and the third bevel gear is rotationally arranged in the groove. When the load is increased, the contact area of the bevel gear is increased, the load is effectively dispersed, and the pressure of unit area is reduced, so that the abrasion is reduced, the bearing capacity is improved, the service life is prolonged, the problems of abrasion and efficiency in the prior art are solved, and the noise generated by transmission is reduced; the abrasion of the third bevel gear and the abrasion of the first bevel gear are reduced, so that the service lives of the first bevel gear and the third bevel gear are prolonged, and the maintenance cost is reduced.

Description

Technical Field

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

[0002] In the field of mechanical transmission, right-angle reversing reducers play an extremely critical role. Traditional right-angle reversing reducers generally use bevel gears to achieve the purpose of power transmission. During its operation, whether it is under high load or low load conditions, the contact area between the bevel gears always remains constant. However, in actual long-term use, due to the inevitable wear, the service life of the bevel gears is reduced. This phenomenon will cause the matching accuracy between the bevel gears to gradually decrease, and then the transmission accuracy of the entire right-angle reversing reducer will continue to decline. In addition, due to the existence of wear problems, in order to ensure its normal operation and maintain a certain transmission accuracy, it must be regularly maintained and repaired, which undoubtedly increases the use cost and maintenance cost of the equipment. Summary of the invention

[0003] The object of the present invention is to overcome the above-mentioned shortcomings and provide a precision commutator. When the load increases, the contact area of ​​the bevel gear 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 the transmission. When the load decreases, only the second bevel gear is meshed with the first bevel gear, reducing the wear of the third bevel gear and facilitating 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 object, the specific scheme of the present invention is as follows:

[0005] A precision commutator 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;

[0006] The first output shaft fixing sleeve is provided with a second bevel gear; the second bevel gear is meshed 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.

[0007] Optionally, 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;

[0008] 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.

[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; and the driving groove is communicated with the connecting groove.

[0010] Optionally, the outer wall of the connecting portion is provided with a limit baffle for limiting the travel of the push ring.

[0011] Optionally, the second output shaft is rotatably connected to the transmission seat via 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.

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

[0013] Optionally, the reversing transmission structure includes a transmission gear rotatably arranged on a transmission seat, a first tooth structure arranged on the inner circumferential wall of the third bevel gear, and a second tooth structure arranged on the outer circumferential wall of the second output shaft; the transmission gear is meshed 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 via 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 is meshed or disengaged with 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 which time the second bevel gear and the third bevel gear are both meshed with the first bevel gear, thereby increasing the contact area of ​​the bevel gears, effectively dispersing the load, and reducing the pressure per unit area, 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 the transmission; when the load decreases, the switching component makes the third bevel gear disengage from the first bevel gear, at which time only the second bevel gear is meshed with the first bevel gear, reducing the wear of the third bevel gear and reducing the wear on the first bevel gear, thereby extending the service life of the first bevel gear and the third bevel gear, thereby reducing maintenance costs. BRIEF DESCRIPTION OF THE DRAWINGS

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

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

[0020] Figure 3 yes Figure 2 A partial enlarged schematic diagram in the middle;

[0021] Figure 4 is a cross-sectional schematic diagram of the present invention when the third bevel gear is meshing with the first bevel gear;

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

[0023] Figure 6 It is a partial structural schematic diagram of the present invention;

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

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

[0026] Fig. 9 It is a structural schematic diagram of the locking block of the present invention;

[0027] Fig.10 is a schematic structural diagram of the second output shaft of the present invention;

[0028] Fig.11 is a schematic structural diagram of the third bevel gear of the present invention;

[0029] Explanation of the accompanying drawings: 1. transmission seat; 11. flange; 111. connecting ring; 112. second slide groove; 12. mounting shaft; 2. first output shaft; 21. connecting groove; 3. second output shaft; 31. first slide groove; 32. connecting part; 33. limit 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 mouth; 632. second spring; 633. inclined surface; 64. push ring; 641. connecting arm; 642. groove; 7. third bevel gear; 71. annular groove; 81. transmission gear; 82. first tooth structure; 83. second tooth structure; 9. first bearing; 10. second bearing. DETAILED DESCRIPTION

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

[0031] like Figures 1 to 11 As shown, a precision commutator described in this embodiment includes a transmission base 1; the transmission base 1 is rotatably provided with a first output shaft 2 and a second output shaft 3 coaxially arranged; the transmission base 1 is also rotatably provided with a first bevel gear 4; the axis of the first bevel gear 4 is perpendicular to the axis of the first output shaft 2 and the second output shaft 3; the first output shaft 2 is fixedly sleeved with a second bevel gear 5; the second bevel gear 5 is meshed with the first bevel gear 4; a switching assembly and a third bevel gear 7 are slidably provided in the transmission base 1; a reversing 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 provided in the groove 642.

[0032] Specifically, the switching assembly drives the third bevel gear 7 to slide, so that the third bevel gear 7 is meshed or disengaged with the first bevel gear 4, thereby changing the contact area of ​​the bevel gears; when the load increases, the switching assembly causes the third bevel gear 7 to mesh with the first bevel gear 4, such as Figure 4 As shown, at this time, the second bevel gear 5 and the third bevel gear 7 are both meshed 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 wear and efficiency problems existing in the prior art, thereby reducing the noise generated by the transmission; when the load is reduced, the switching component disengages the third bevel gear 7 from the first bevel gear 4, as shown in FIG. Figure 2 As shown, at this time, only the second bevel gear 5 is meshed with the first bevel gear 4, which reduces the wear of the third bevel gear 7 and the wear of the first bevel gear 4, thereby extending the service life of the first bevel gear 4 and the third bevel gear 7 and reducing the maintenance cost.

[0033] In this embodiment, a reversing transmission structure is provided so that when the third bevel gear 7 is meshed with the first bevel gear 4, the third bevel gear 7 can synchronously drive the second output shaft 3 to rotate, so as to realize torque transmission.

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

[0035] A transmission shaft 611 is radially extended from the inner wall of the slip ring 61; the transmission shaft 611 is movable and penetrates the driving groove 62; the driving groove 62 is V-shaped; the second output shaft 3 is provided with a first sliding groove 31; the transmission shaft 611 is provided with a slider 612 in the first sliding groove 31; a first spring 613 is provided between the slider 612 and the second output shaft 3; the locking block 63 is located at the inflection point of the driving groove 62; the locking block 63 is provided with a V-shaped opening 631; a second spring 632 is provided between the locking block 63 and the first output shaft 2; a connecting arm 641 is extended 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 with the transmission seat 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 is pressed by the inclined surfaces 633 to squeeze the locking block 63 and be stuck in 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 to facilitate the reset of the slip ring 61 .

[0036] Specifically, initially, the transmission shaft 611 is located in the V-shaped groove 631 of the locking block 63, and 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 groove 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, the locking block 63 needs to overcome a larger force to drive the transmission shaft 611 to rotate. At this time, relative movement is generated between the transmission shaft 611 and the locking block 63, and the transmission shaft 611 squeezes the locking block 63, so that the second spring 632 is compressed, and the transmission shaft 611 escapes from the V-shaped groove 631. , and moves relatively 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, so that the slip ring 61 slides relative to the first output shaft 2, and the slip ring 61 drives the push ring 64 to slide. 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 mesh with the first bevel gear 4. The third bevel gear 7 synchronously transmits the torque input through the first bevel gear 4. 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 in the first slide groove 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, and the slider 612 drives the transmission shaft 611 to reset to the inflection point of the drive groove 62 and squeezes the locking block 63 until the transmission shaft 611 enters the V-shaped groove 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 drive groove 62 again, thereby 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, which can cause the transmission shaft 611 to escape from the V-shaped notch 631 .

[0039] like Figure 2 , Figures 4 to 7 , Fig.10 As shown, in some embodiments of the precision commutator described in this embodiment, the inner end of the second output shaft 3 is provided with a connecting portion 32; the inner end of the first output shaft 2 is provided with a connecting groove 21; the connecting portion 32 is rotatably arranged in the connecting groove 21; the first slide groove 31 is arranged on the connecting portion 32; the driving groove 62 is connected to the connecting groove 21. In this embodiment, the first output shaft 2 and the second output shaft 3 are assembled by providing the connecting groove 21 and the connecting portion 32.

[0040] like Figure 2 , Figures 4 to 6 , Fig.10 As shown, in the precision commutator described in this embodiment, in some embodiments, the outer wall of the connecting portion 32 is provided with a limit baffle 33 for limiting the travel of the push ring 64. In this embodiment, the limit baffle 33 is provided to limit the sliding travel of the push ring 64, and the structural reliability is higher.

[0041] like Figure 1 , Figure 2 , Figures 4 to 6 As shown, in some embodiments of the precision commutator described in this embodiment, the second output shaft 3 is rotatably connected to the transmission seat 1 through the flange 11; a connecting ring 111 extends from the inner side of the flange 11; the third bevel gear 7 is provided with an annular groove 71; and the connecting ring 111 is movably embedded in the annular groove 71. In this embodiment, the flange 11 is provided to facilitate the installation of the second output shaft 3, and the annular groove 71 is provided to cooperate with the connecting ring 111, thereby providing guidance and limiting for the third bevel gear 7, so that the third bevel gear 7 is more stable during the transmission process.

[0042] like Figure 2 , Figure 4 and Figure 5 As shown, in some embodiments of the precision commutator described in this embodiment, a second slide groove 112 is provided on the inner side of the flange 11; the connecting arm 641 slides and extends into the second slide groove 112. In this embodiment, the second slide groove 112 is provided to cooperate with the connecting arm 641 to limit the rotational freedom of the push ring 64, so that the push ring 64 can only slide axially, and the structural reliability is better.

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

[0044] Specifically, when the third bevel gear 7 is meshed with the first bevel gear 4, the first bevel gear 4 drives the third bevel gear 7 to rotate, and the rotation direction of the third bevel gear 7 is opposite to that of the second bevel gear 5. 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 in the opposite direction through the second tooth structure 83, so that the second output shaft 3 rotates under the joint drive of the first output shaft 2 and the third bevel gear 7, thereby increasing the contact area of ​​the bevel gear, effectively dispersing the load, reducing the pressure per unit area, thereby reducing wear, and improving its load-bearing capacity and service life.

[0045] like Figure 2 , Figure 4 and Figure 5 As shown, in some embodiments of the precision commutator described in this embodiment, a mounting shaft 12 extends from the inner wall of the transmission seat 1; the transmission gear 81 is rotatably sleeved on the mounting shaft 12. In this embodiment, the mounting shaft 12 is provided to facilitate the installation of the transmission gear 81.

[0046] like Figure 2 , Figures 4 to 6 As shown, in some embodiments of the precision commutator described in this embodiment, the outer wall of the first bevel gear 4 is rotatably connected to the inner wall of the transmission seat 1 through the first bearing 9. In this embodiment, the first bearing 9 is provided so that the first bevel gear 4 rotates more stably and has better stability, thereby ensuring transmission accuracy.

[0047] like Figure 2 , Figures 4 to 6 As shown, in some embodiments of the precision commutator described in this embodiment, the outer wall of the second bevel gear 5 is rotatably connected to the inner wall of the transmission seat 1 through the second bearing 10. In this embodiment, the second bevel gear 5 is provided with the second bearing 10 so that the rotation is more stable and the stability is better, thereby 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 structure, characteristics and principles described in the scope of the patent application of the present invention are included in the protection scope of the patent application of the present invention.

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 is meshed 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.

2. A precision commutator according to claim 1, characterized in that: 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.

3. A precision commutator according to claim 2, 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 to the connecting groove.

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

5. A precision commutator according to claim 2, 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.

6. A precision commutator according to claim 5, 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.

7. The 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.

8. A precision commutator according to claim 7, 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.

9. 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.

10. 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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