CN221683567U - Anti-backlash gear assembly - Google Patents

Abstract

The utility model discloses an anti-backlash gear assembly, which comprises a main gear body and a main gear shaft; the auxiliary gear is coaxially arranged with the main gear and can rotate relative to the main gear, and a first protruding part is formed on the auxiliary gear; the transmission part is connected with the main gear and is inserted and fixed in the main gear shaft; the adjusting component is in threaded fit with the transmission component; the sliding part is sleeved on the main gear shaft and is in sliding connection with the main gear shaft, and a second protruding part is formed above the sliding part; an elastic pushing assembly arranged between the adjusting part and the sliding part and capable of being pushed to move when the adjusting part moves linearly so as to apply elastic pushing force to the sliding part to move along the axial direction of the main gear; an elastic element disposed between the sliding member and the pinion gear; when the sliding part moves, the second protruding part can push the first protruding part to drive the auxiliary gear to rotate along the circumferential direction of the main gear relative to the main gear. The anti-backlash gear assembly provided by the utility model has the advantages of simple structure, small occupied space and low cost.

Description

Anti-backlash gear assembly

Technical Field

The utility model belongs to the technical field of gear clearance elimination, and in particular relates to a clearance elimination gear component structure.

Background Art

During the gear transmission process, due to the backlash between the meshing of gears and gears, and gears and racks, poor following performance and shaking will occur during the movement of the mechanism, seriously affecting the accuracy of the mechanism.

The method usually used to eliminate gear backlash is to use two gears, one of which is used as a driving gear to provide the driving force for movement, and the other is used as a passive gear to eliminate the backlash of the driving gear by providing movement resistance.

For example, the patent document number is: 201410442124.5, and the patent name is a torsion bar anti-backlash transmission device. The patent discloses a torsion bar anti-backlash transmission device structure through motion resistance, and discloses:

A torsion bar backlash-eliminating transmission device comprises a gear box, a backlash-eliminating transmission gear train installed in the gear box, a backlash-eliminating component, and an overload protection component; the backlash-eliminating transmission gear train comprises a large gear (4), an hollow wheel I (5), an hollow wheel II (6), a large gear I (14), a large gear II (17), a small gear I (16), a small gear II (18), and a rack (21); the rack (21) is fixedly connected to a machine tool component to be reciprocated; the hollow wheel I (5) and the hollow wheel II (6) The gear (4) is axially concentric with the large gear (14), the large gear (14) is coaxial with the pinion (16), the large gear (17) is coaxial with the pinion (18), the pinion (16) has a tooth surface that meshes with the tooth surface of the rack (21) in a positive direction, and the pinion (18) has a tooth surface that meshes with the other tooth surface of the rack (21) in a reverse direction; the large gear (4) is driven by an external servo motor gear, the large gear (4) rotates the hollow wheel (6) through the anti-backlash component, and directly rotates the hollow wheel (1) through the key and keyway. 5); the hollow wheel I (5) is a hollow cylinder having a keyway on the outer surface of the upper end, an external gear (5.1) on the lower end, and a through hole in the middle; the hollow wheel II (6) is a hollow cylinder having an external gear (6.3) on the upper end, an external gear (6.1) on the lower part, and a through hole in the middle, and the hollow wheel II (6) also has an internal gear (6.2) at the lower end of the through hole; the external gear (5.1) of the hollow wheel I (5) meshes with the large gear I (14), and the external gear (6.1) on the lower part of the hollow wheel II (6) meshes with the large gear I (14). The large gear (4) is meshed with the hollow wheel I (5) by a key (2); the hollow wheel II (6) is sleeved in a through hole inside the hollow wheel I (5); the anti-backlash assembly comprises a tightening plate (7), a torsion bar (8), at least two positioning pins (9), and a screw (24); the positioning pins (9) are fixedly connected to the upper surface of the large gear (4) with the center of the large gear (4) as a symmetrical point; the tightening plate (7) is a rigid body that is wide and thin in the middle and thick and narrow at both ends; The two ends of the tightening disk (7) have horizontal rectangular opening grooves, the vertical side surfaces of the rectangular opening grooves have U-shaped holes, the middle of the tightening disk (7) has an annular groove (7.2), and the center of the tightening disk (7) has internal teeth (7.1); the middle and the two ends of the torsion bar (8) are cylinders of different diameters, the upper end of the torsion bar (8) has external teeth (8.1) that cooperate with the internal teeth (7.1) of the tightening disk (7), and a clamping ring (3) is clamped in the annular groove at the upper end of the torsion bar (8). The rod (8) is suspended on the tightening disk (7) through a retaining ring (3); the lower end of the torsion rod (8) has an external gear (8.2); the internal gear (6.2) of the hollow wheel II (6) is meshed with the external gear (8.2) at the lower end of the torsion rod; one end of the screw rod (24) has an annular body sleeved on the outside of the positioning pin (9); the other end of the screw rod (24) is inserted into the rectangular opening groove at the end of the tightening disk (7); a hemispherical washer (25) is sleeved on the screw rod (24), and a locking nut is screwed through the screw. The rod (24) and the positioning pin (9) position the tightening disk (7) on the upper part of the large gear (4); the overload protection assembly comprises a torque arm (19), a transmission pin (20), and an adjustment screw (23); the torque arm (19) is a rigid body which is wide and thin in the middle and narrow and thick at both ends; horizontal threaded through holes (19.3) are formed at both ends of the torque arm (19); an annular boss (19.2) is formed in the middle of the torque arm (19); the center of the torque arm (19) is an internal gear (19.1); the internal gear (19. 1) meshes with the external gear (6.3) at the upper end of the hollow gear II (6); the transmission pin (20) is at least two cylindrical pins (20) fixedly connected to the upper surface of the large gear (4) and symmetrically connected to the center of the large gear (4); the adjustment screw (23) is screwed into the threaded holes (19.3) at both ends of the torsion arm (19), and the adjustment screw (23) is also provided with a locking nut; the annular boss (19.2) is slidably matched with the annular groove (72) on the tightening plate (7).

The overall structure is complex, heavy, occupies a large space and has a high cost.

The above information disclosed in the background technology is only used to increase the understanding of the background technology of the present application, and therefore, it may include information that does not constitute the prior art known to ordinary technicians in the field.

Utility Model Content

The utility model aims at the above technical problems existing in the anti-backlash gear structure in the prior art, and proposes a novel anti-backlash gear assembly, which has a simple structure, occupies a small space and has a low cost.

In order to achieve the above utility model/design purpose, the utility model adopts the following technical solutions:

A backlash-eliminating gear assembly, comprising:

Includes: Main gear, including:

A main gear body and a main gear shaft connected to the main gear body;

A secondary gear is coaxially arranged with the main gear and can rotate relative to the main gear, and a first protrusion is formed on the secondary gear;

A transmission component is connected to the main gear and is arranged to extend along the axial direction of the main gear. The transmission component is inserted and fixed in the main gear shaft;

An adjusting component, threadably matched with the transmission component, and capable of at least linearly moving relative to the transmission component;

A sliding component is sleeved on the main gear shaft and slidably connected to the main gear shaft, and a second protrusion is formed on the upper side of the sliding component;

An elastic push component is arranged between the adjusting component and the sliding component, and can be pushed to move when the adjusting component moves linearly to apply an elastic thrust to the sliding component to make it move along the axial direction of the main gear;

an elastic element, arranged between the sliding component and the pinion gear;

When the sliding component moves, the second protrusion can push the first protrusion to drive the secondary gear to rotate relative to the main gear along the circumferential direction of the main gear.

In some embodiments of the present application, a threaded transmission portion is formed on the transmission component, an internal threaded matching portion is formed on the adjustment component, and the adjustment component is screwed onto the transmission component.

In some embodiments of the present application, at least one of the first protrusion and the second protrusion is eccentric.

In some embodiments of the present application, the first protrusion has a first mating surface, the second protrusion has a second mating surface that contacts and cooperates with the first mating surface, and the first mating surface and the second mating surface are arc-shaped surfaces or inclined surfaces.

In some embodiments of the present application, the elastic push assembly includes a first gasket component, a first thrust bearing, a guide sleeve, and an elastic member and a second gasket component sleeved on the guide sleeve, which are arranged in sequence along the axial direction of the transmission component.

In some embodiments of the present application, the first gasket component, the first thrust bearing and the guide sleeve are assembled on the transmission component.

In some embodiments of the present application, a clamping portion is formed on the sliding component, and the second gasket component abuts against the clamping portion.

In some embodiments of the present application, a mounting groove is provided on the main gear and/or the auxiliary gear, and the second thrust bearing is installed in the mounting groove.

Compared with the prior art, the advantages and positive effects of the utility model are:

The anti-backlash gear assembly of the utility model adopts a main gear and a sub-gear matched with the main gear in terms of structural setting, and a transmission component and an adjustment component are connected to the main gear, and an elastic push component is arranged between the sliding component and the adjustment component. When adjusting, it is only necessary to operate the adjustment component to change the elastic force of the elastic push component on the sliding component so that the sliding component moves along the axial direction of the main gear to squeeze the first protrusion. The number of components of the entire anti-backlash gear assembly is small and the structure is simple.

In terms of structural setting, the transmission component extends along the axial direction of the main gear, and the adjustment component, elastic push assembly and sliding component are arranged on the transmission component in sequence and along the axial direction of the main gear. All components are basically arranged along the axial direction of the main gear. The overall structure is compact and occupies a small space. The component structures used are all conventional and easy to purchase components, and the overall cost is low.

After reading the specific embodiments of the present invention in conjunction with the accompanying drawings, other features and advantages of the present invention will become more clear.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

FIG1 is a three-dimensional structural diagram of an embodiment of the anti-backlash gear assembly proposed by the present invention;

FIG2 is a partial cross-sectional view of an embodiment of the anti-backlash gear assembly proposed by the present invention;

FIG3 is a top view of an embodiment of the anti-backlash gear assembly proposed by the present invention;

Fig. 4 is a cross-sectional view taken along the line A-A of Fig. 3 .

In the figure, 100, main gear; 110, main gear body; 120, main gear shaft; 130, main meshing tooth; 200, auxiliary gear; 210, first protrusion; 211, first matching surface; 220, auxiliary meshing tooth; 300, transmission component; 400, adjustment component; 500, sliding component; 510, second protrusion; 511, second matching surface; 520, engaging portion; 600, elastic push assembly; 610, first gasket component; 620, first thrust bearing; 630, guide sleeve; 631, sleeve body; 632, annular protrusion; 633, edge protrusion; 640, elastic member; 650, second gasket component; 700, elastic element; 800, second thrust bearing.

DETAILED DESCRIPTION

The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

In the description of the present invention, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore, should not be understood as a limitation on the present invention.

In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances. In the description of the implementation method, specific features, structures, materials or characteristics can be combined in any one or more embodiments or examples in a suitable manner.

The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features.

In the description of the present invention, unless otherwise specified, “plurality” means two or more.

The utility model provides an embodiment of an anti-backlash gear assembly, which can be used to eliminate the backlash of its meshing matching parts. The anti-backlash gear assembly in this embodiment can be used in a transmission mechanism in which gears match gears, and can also be used in a transmission mechanism in which gears match racks.

During transmission, the anti-backlash gear assembly cooperates with the gear or rack that matches it.

The anti-backlash gear assembly specifically includes:

Main gear 100;

A secondary gear 200 is coaxially arranged with the primary gear 100 and is rotatable relative to the primary gear 100;

In some embodiments of the present application, the main gear 100 includes: a main gear body 110 and a main gear shaft 120 connected to the main gear body 110 .

The main tooth body 110 is provided with a plurality of main meshing teeth 130 arranged along its circumference;

The secondary gear 200 is sleeved on the main gear shaft 120 to achieve a coaxial arrangement with the main gear 100 , and the secondary gear 200 can rotate along the main gear shaft 120 .

The auxiliary gear 200 includes a plurality of auxiliary meshing teeth 220 arranged along the circumference thereof.

In order to reduce the friction between the secondary gear 200 and the main gear 100 when the secondary gear 200 rotates relative to the main gear 100, in some embodiments of the present application, a mounting groove is provided on the main gear 100 and/or the secondary gear 200, and the second thrust bearing 800 is installed in the mounting groove.

The second thrust bearing 800 between the main gear 100 and the sub gear 200 can ensure that the sub gear 200 can rotate smoothly relative to the main gear 100 without generating hard friction due to direct contact with the end surface of the main gear 100, resulting in relative wear between the two.

The main gear 100 and the secondary gear 200 may be spur gears or helical gears, and the corresponding meshing parts meshing therewith may also be spur gears or helical gears.

The secondary gear 200 is formed with a first protrusion 210;

The first protrusion 210 is formed on the end surface of the secondary gear 200 away from the main gear 100 and is extended along the axis direction of the main gear 100;

The transmission component 300 is connected to the main gear 100 and is arranged to extend axially along the main gear 100;

The transmission component 300 may be a transmission shaft or a transmission rod, which is inserted and fixed in the main gear shaft 120 and arranged axially along the main gear 100 , or is directly formed integrally with the main gear 100 .

The adjusting component 400 cooperates with the transmission component 300 and can at least move linearly relative to the transmission component 300;

The sliding component 500 has a second protrusion 510 formed on its upper portion, which is used to cooperate with the first protrusion 210 .

The sliding component 500 is slidably connected to the main gear shaft 120 .

In some embodiments of the present application, the sliding component 500 is a sliding ring, which can slide along the main gear shaft 120 , that is, slide along the axial direction of the main gear 100 .

In order to achieve the sliding of the sliding component 500 relative to the main gear shaft 120 , a sliding structure is provided between the sliding component 500 and the main gear shaft 120 .

The sliding structure includes a sliding key arranged on the sliding component 500 and a sliding groove arranged on the main gear shaft 120. The sliding groove is opened along the axis of the main gear shaft 120. The sliding component 500 can slide along the sliding groove through the sliding key to ensure that it can only slide along the axial direction of the main gear 100.

In some embodiments of the present application, at least one of the first protrusion 210 and the second protrusion 510 is eccentric.

By arranging at least one of the first protrusion 210 and the second protrusion 510 to be eccentric, it can be ensured that when the sliding component 500 slides axially along the main gear 100, the second protrusion 510 can squeeze the first protrusion 210 and apply a rotational torque to the first protrusion 210 and the sub-gear 200 so that the first protrusion 210 and the sub-gear 200 integrated with the first protrusion 210 rotate relative to the main gear 100.

The elastic push assembly 600 is arranged between the adjusting component 400 and the sliding component 500, and can apply an elastic preload force to the sliding component 500, and is pushed to move when the adjusting component 400 is adjusted to change its elastic preload force on the sliding component 500;

The elastic push assembly 600 is mainly used to apply an elastic preload force to the sliding component 500 .

An elastic element 700 is arranged between the sliding component 500 and the pinion 200;

The elastic element 700 may be a disc spring or a spring, which is compressed between the sliding member 500 and the pinion gear 200 .

By setting the elastic element 700, a reverse elastic force can be applied to the sliding component 500 and the secondary gear 200, so that the secondary gear 200 can maintain a tight fit with the main gear 100.

The elastic element 700 provides a reverse elastic force to the sliding component 500, and the sliding component 500 can be kept at a preset position by the cooperation of the elastic element 700 and the elastic push assembly 600;

If only one elastic push assembly 600 is provided, the sliding member 500 will be directly inserted into the recessed portion formed by the two first protrusions 210 under the action of the elastic push assembly 600, and further adjustment cannot be performed;

In addition, the elastic element 700 can also provide a reverse force to the sliding component 500 when the sliding component 500 is pushed by the elastic push assembly 600, so as to ensure that the sliding component 500 moves evenly and smoothly.

When the adjusting component 400 moves, the elastic push assembly 600 is pushed to move and pushes the sliding component 500 to move so that the second protrusion 510 pushes the first protrusion 210 to drive the auxiliary gear 200 to rotate relative to the main gear 100.

When adjustment is required, force can be applied to the adjusting component 400 to make it move linearly relative to the transmission component 300, thereby compressing the elastic push component 600 arranged between the adjusting component 400 and the sliding component 500, changing the elastic compression force of the elastic push component 600 on the sliding component 500, and pushing the sliding component 500 to move. The sliding component 500 moves axially along the main gear 100, and the second protrusion 510 above it also continues to move axially. When moving, it compresses the first protrusion 210 through the second protrusion 510, so that the first protrusion 210 and the sub-gear 200 rotate relative to the main gear 100. After the sub-gear 200 rotates a certain angle relative to the main gear 100, its sub-meshing teeth and main meshing teeth can respectively abut against the opposite sides of the two teeth of the meshing component, thereby achieving a backlash elimination effect, thereby improving the followability of the entire motion mechanism and the motion accuracy of the entire motion mechanism.

For meshing components with different tooth gaps that cooperate with the backlash-eliminating gear assembly, when in use, the gap can be adjusted according to the actual tooth gap. The adjustment is mainly achieved by changing the elastic force of the elastic push assembly 600 on the sliding component 500 through the action of the adjusting component 400. If the tooth spacing between the two teeth is small, the adjusting component 400 can be moved a small distance, driving the sliding component 500 to move a small distance, thereby making the secondary gear 200 rotate a small angle to ensure that the main meshing teeth and the secondary meshing teeth are respectively against the opposite sides of the two teeth of the meshing component;

If the tooth spacing between the two teeth is large, the elastic force of the elastic push component 600 on the sliding component 500 can be changed by adjusting the component 400 to move the sliding component 500 a larger distance, squeeze the first protrusion 210, and rotate the auxiliary gear 200 by a larger angle to ensure that the main meshing teeth and the auxiliary meshing teeth are respectively against the opposite sides of the two teeth of the meshing component.

The anti-backlash gear assembly in this embodiment, when in use, can be adjusted by adjusting the force of the adjusting component 400 to the elastic push component 600 to change the elastic force of the sliding component 500 according to the different spacings between the two teeth of the meshing component that cooperates with it. The adjustment can be achieved by changing the elastic compression force of the elastic push component 600 on the sliding component 500 to change the torque applied by the sliding component 500 to the sub-gear 200, so that it can adapt to meshing components with different tooth spacings and has good versatility.

The anti-backlash gear assembly in this embodiment adopts a main gear 100 and a sub-gear 200 matched with the main gear 100 in terms of structural setting. At the same time, a transmission component 300 and an adjustment component 400 are connected to the main gear 100, and an elastic push component 600 is arranged between the sliding component 500 and the adjustment component 400. When adjusting, it is only necessary to operate the adjustment component 400 to change the elastic force of the elastic push component 600 on the sliding component 500 so that the sliding component 500 moves axially along the main gear 100 to squeeze the first protrusion 210. The entire anti-backlash gear assembly has a small number of components and a simple structure.

In terms of structural setting, the transmission component 300 extends axially along the main gear 100, and the adjustment component 400, the elastic push component 600 and the sliding component 500 are arranged in sequence on the transmission component 300 and arranged axially along the main gear 100. All components are basically arranged axially along the main gear 100. The overall structure is compact and occupies a small space. The component structures used are all conventional and easy-to-purchase components, and the overall cost is low.

In order to achieve that the sliding component 500 applies torque to the sub-gear 200 evenly and smoothly when sliding along the axial direction of the main gear 100, a plurality of first protrusions 210 are provided, and are evenly arranged along the circumference of the sub-gear 200, and the insertion gap is formed between two adjacent first protrusions 210, and a plurality of insertion spacings are formed between the plurality of first protrusions 210;

There are also multiple second protrusions 510 arranged accordingly, which are evenly arranged along the circumference of the sliding component 500. When the sliding component 500 moves to the position of the sub-gear 200, the multiple second protrusions above it are respectively inserted into the multiple insertion gaps formed by the multiple first protrusions 210 and contact the surfaces of the second protrusions 510 and the first protrusions 210.

During adjustment, the plurality of second protrusions can be respectively pressed against the plurality of first protrusions, so that the sub-gear 200 is subjected to torsional force at each circumferential position, so that it rotates smoothly.

In some embodiments of the present application, a threaded transmission portion is formed on the transmission component 300 , an internal threaded matching portion is formed on the adjustment component 400 , and the adjustment component 400 is screwed onto the transmission component 300 .

The transmission component 300 is a transmission screw, which is inserted into the main gear shaft 120 of the main gear 100 to achieve connection and fixation with the main gear 100 . The threaded transmission part is an external thread provided on the transmission component 300 .

The adjusting component 400 is an adjusting nut, and the internal thread matching portion is an internal thread formed in the adjusting nut. When matched, the adjusting nut is screwed and fixed on the transmission screw through the internal thread.

During adjustment, the adjusting nut can be screwed to make it move in a spiral line along the transmission component 300, compressing the elastic push component 600 located between the adjusting component 400 and the sliding component 500, and the sliding component 500 is compressed by the elastic push component 600 to move along the axial direction of the main gear 100.

In some embodiments of the present application, the first protrusion 210 has a first mating surface 211, and the second protrusion 510 has a second mating surface 511 that contacts and mates with the first mating surface 211, and the first mating surface 211 and the second mating surface 511 are arcuate surfaces or inclined surfaces.

When the sliding component 500 is subjected to force and moves axially, it can press the first matching surface 211 in contact with it through the second matching surface 511 , thereby pressing the sub-gear 200 .

The contacting surfaces of the two can be arcuate surfaces or inclined surfaces.

In some embodiments of the present application, the elastic push assembly 600 includes a first gasket component 610, a first thrust bearing 620, a guide sleeve 630, and an elastic member 640 and a second gasket component 650 arranged in sequence along the axial direction of the transmission component 300.

The elastic member 640 is a disc spring or a spring.

In some embodiments of the present application, the first gasket component 610 , the first thrust bearing 620 , and the guide sleeve 630 are assembled on the transmission component 300 .

During assembly, the first gasket component 610 , the first thrust bearing 620 and the first guide sleeve 630 are sequentially sleeved on the transmission component 300 .

The first guide sleeve 630 includes a sleeve body 631 and an annular protrusion 632 extending from the upper circumference of the sleeve body 631, and an edge protrusion 633 arranged along the circumference is formed at the edge of the annular protrusion 632, and a placement space is formed between the annular protrusion 632, the edge protrusion 633 and the first gasket component 610, and the first thrust bearing 620 is arranged in the placement space.

The elastic member 640 and the second gasket member 650 are sleeved on the first guide sleeve 630 .

One end of the elastic member 640 abuts against the annular protrusion 632 , and the other end abuts against the second gasket component 650 .

In some embodiments of the present application, a snap-fit portion 520 is formed on the sliding component 500 , and the second gasket component 650 abuts against the snap-fit portion 520 .

The engaging portion 520 is an engaging surface formed on the sliding component 500 , and the second gasket component 650 abuts against the engaging surface.

When the force is applied to the adjusting component 400, the adjusting component 400 moves linearly, applying the force to the first gasket component 610, the first thrust bearing 620 and the first guide sleeve 630. The first guide sleeve 630 transmits the force to the elastic member 640 and the second gasket component 650, and transmits the force to the sliding component 500 through the second gasket component 650, causing it to move.

The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the above embodiments, it is still possible for a person skilled in the art to modify the technical solutions described in the above embodiments, or to replace some of the technical features therein with equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions claimed to be protected by the present invention.

Claims (8)

1. A backlash-eliminating gear assembly, comprising: Main gear, including: A main gear body and a main gear shaft connected to the main gear body; A secondary gear is coaxially arranged with the main gear and can rotate relative to the main gear, and a first protrusion is formed on the secondary gear; A transmission component is connected to the main gear and is arranged to extend along the axial direction of the main gear. The transmission component is inserted and fixed in the main gear shaft; An adjusting component, threadably matched with the transmission component, capable of linearly moving relative to the transmission component; A sliding component is sleeved on the main gear shaft and slidably connected to the main gear shaft, and a second protrusion is formed on the upper side of the sliding component; An elastic push component is arranged between the adjusting component and the sliding component, and can be pushed to move when the adjusting component moves linearly to apply an elastic thrust to the sliding component to make it move along the axial direction of the main gear; an elastic element, arranged between the sliding component and the pinion gear; When the sliding component moves, the second protrusion can push the first protrusion to drive the secondary gear to rotate relative to the main gear along the circumferential direction of the main gear. 2. The anti-backlash gear assembly according to claim 1, characterized in that: A threaded transmission part is formed on the transmission component, an internal threaded matching part is formed on the adjustment component, and the adjustment component is screwed on the transmission component. 3. The anti-backlash gear assembly according to any one of claims 1 to 2, characterized in that: At least one of the first protrusion and the second protrusion is eccentric. 4. The anti-backlash gear assembly according to claim 3 is characterized in that the first protrusion has a first mating surface, the second protrusion has a second mating surface that contacts and cooperates with the first mating surface, and the first mating surface and the second mating surface are arcuate surfaces or inclined surfaces. 5. The anti-backlash gear assembly according to claim 1 is characterized in that the elastic push assembly includes a first gasket component, a first thrust bearing, a guide sleeve, and an elastic member and a second gasket component mounted on the guide sleeve, which are arranged in sequence along the axial direction of the transmission component. 6. The anti-backlash gear assembly according to claim 5, wherein the first washer component, the first thrust bearing and the guide sleeve are assembled on the transmission component. 7 . The backlash-eliminating gear assembly according to claim 6 , wherein a clamping portion is formed on the sliding component, and the second gasket component abuts against the clamping portion. 8. The anti-backlash gear assembly according to claim 1, characterized in that a mounting groove is provided on the main gear and/or the auxiliary gear, and a second thrust bearing is installed in the mounting groove.