Non-backlash meshing gear

Abstract

The utility model belongs to the technical field of gear transmission, and provides a backlash-free meshing gear which comprises a driven gear, and a backlash eliminating gear is arranged on the front face of the driven gear through a filling structure. The filling structure comprises a plurality of guide sliding grooves formed in the front face of the driven gear at equal intervals, guide sliding blocks are slidably arranged in the guide sliding grooves, backlash eliminating gears are arranged on the front faces of the guide sliding blocks, and contact blocks are arranged at the two ends in the guide sliding grooves. The problems that due to the fact that a plurality of connecting blocks and connecting grooves are movably connected in an inserted mode in an existing device, a certain moving space is formed between a driving gear and a gear single piece, the gear single piece is used for filling the backlash of the driving gear, but corresponding displacement cannot be conducted according to the driving gear through movable inserting connection of the connecting blocks and the connecting grooves, and the gear single piece is damaged are solved. Therefore, the method is only suitable for a gear meshing system with one-way movement and is not suitable for a gear meshing system with frequent reversing.

Description

Technical Field

[0001] The utility model relates to the field of gear transmission, in particular to a backlash-free meshing gear. Background Art

[0002] Gear transmission is the most widely used form of transmission in mechanical transmission. It is relatively accurate, efficient, compact, reliable and has a long service life. However, due to factors such as dimensional changes caused by processing and installation errors and temperature changes, as well as to prevent sticking, there is a certain amount of tooth side clearance on the non-working surface of the gear teeth. Gear transmission mechanisms have side clearance. Side clearance is used to prevent gear teeth from sticking due to errors and thermal deformation, and to leave space for the lubricating oil film between the tooth surfaces. However, side clearance also causes a certain amount of idle travel during reverse rotation, making the mechanism unable to accurately position. At the same time, it generates a lot of noise during operation, accelerating gear damage. In order to reduce or eliminate the adverse effects of side clearance on the mechanism, it is necessary to adopt a gear transmission without side clearance.

[0003] After searching, the patent with publication number CN214699070U discloses a high-strength speed-changing and backlash-free meshing gear, including a driving gear, a first fixed groove is provided on the driving gear, an elastic sheet is provided on the inner wall of the first fixed groove, and a gap-free device is provided in the first fixed groove, the gap-free device includes a gear monolith, a driving block and a rotating fixed block, a first connecting block matching the first fixed groove is provided on one side of the gear monolith close to the driving gear, and a second fixed groove is provided on the other side of the gear monolith, the second fixed groove is circular, and a second connecting block matching therewith is provided in the second fixed groove, the second connecting block is provided on the driving block, and a threaded fixing block is provided on the side of the driving block away from the second fixed block, and a rotating fixed block matching therewith is provided on the threaded fixing block.

[0004] Existing equipment uses the movable plug-in behavior of several connecting blocks and connecting grooves to create a certain movable space between the driving gear and the gear single piece, so that the gear single piece can fill the side clearance of the driving gear. However, the movable plug-in behavior of the several connecting blocks and connecting grooves cannot be moved accordingly according to the driving gear, resulting in a gear meshing system that is only suitable for unidirectional motion and cannot be used for a gear meshing system that frequently changes direction.

[0005] Therefore, it is necessary to provide a backlash-free meshing gear to solve the above technical problems. Utility Model Content

[0006] In order to solve the above technical problems, the utility model provides a backlash-free meshing gear.

[0007] The utility model provides a backlash-free meshing gear, comprising a driven gear, wherein a backlash-eliminating gear is provided on the front face of the driven gear through a filling structure;

[0008] The filling structure includes a plurality of guide grooves equidistantly opened on the front face of the driven gear, a plurality of guide grooves are slidingly provided with guide sliders inside, a plurality of guide sliders are provided with the side clearance eliminating gear on the front face, a plurality of guide grooves are provided with contact blocks at both ends inside, a plurality of contact blocks are connected with connecting rods at the ends away from each other, a plurality of connecting rods are passed through the corresponding guide grooves at the ends away from each other, and extend to the oil chamber opened correspondingly inside the driven gear, and a plurality of connecting rods are provided with pistons at the ends away from each other.

[0009] In order to achieve the effect of oil penetration, the utility model provides a backlash-free meshing gear. Preferably, an oil pipe is provided between two of the oil cavities located at both ends of the same guide groove in the plurality of oil cavities.

[0010] In order to achieve the effect of rotation without jamming, the utility model provides a meshing gear without side clearance. Preferably, some of the guide grooves, some of the guide sliders, some of the contact blocks, some of the connecting rods, some of the oil chambers, and some of the pistons are all arc-shaped at the same angle.

[0011] In order to achieve the effect of independent rotation of the backlash-eliminating gear, the utility model provides a backlash-free meshing gear. Preferably, a rolling bearing is inserted into the interior of the backlash-eliminating gear, and a driven drive shaft is inserted into the interior of the rolling bearing, and one end of the driven drive shaft is fixedly inserted into the driven gear.

[0012] In order to achieve the effect of meshing transmission, the present invention provides a backlash-free meshing gear. Preferably, the driven gear and the bottom end of the backlash-eliminating gear are meshed with the same driving gear.

[0013] In order to achieve the effect of driving the active gear, the present invention provides a backlash-free meshing gear. Preferably, an active drive shaft is fixedly inserted into the interior of the active gear.

[0014] Compared with the prior art, the beneficial effects of the present invention are:

[0015] The invention relates to a backlash-free meshing gear, which eliminates backlash. The forward rotation of the gear will squeeze the contact block on the same side. On the one hand, the hydraulic oil provides a reaction force to eliminate the backlash of the gear and fill the backlash. On the other hand, the hydraulic oil flows to the oil chamber on the other side through the oil pipe, forcing the contact block on the other side to approach the corresponding guide slider, reducing the gap during reversal. This solves the problem of existing equipment using the movable plug-in behavior of several connecting blocks and connecting grooves, so that there is a certain movable space between the driving gear and the gear single piece, and the gear single piece uses this to fill the backlash of the driving gear. However, the movable plug-in behavior of several connecting blocks and connecting grooves cannot be displaced accordingly according to the driving gear, resulting in a gear meshing system that is only suitable for unidirectional movement and cannot be suitable for gear meshing systems that frequently reverse.

[0016] This kind of backlash-free meshing gear provides compressive power by setting up an oil chamber, which solves the problem that the existing equipment uses a number of connecting blocks and connecting grooves for active plug-in connection, so that there is a certain amount of movable space between the driving gear and the gear single piece, resulting in the connection's ability to resist external impact force being weak, and it is very easy to break and make abnormal noises. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A schematic structural diagram of a preferred embodiment of a backlash-free meshing gear provided by the present invention;

[0018] Figure 2 for Figure 1 The schematic diagram of the structure of the driven gear meshing with the driving gear is shown;

[0019] Figure 3 for Figure 1 The schematic structural diagram of the driven gear shown in front section;

[0020] Figure 4 for Figure 1 The schematic diagram of the structure of the back side clearance elimination gear is shown;

[0021] Figure 5 for Figure 3 Schematic diagram of the structure of structure A shown.

[0022] Numbers in the figure: 1. Driven gear; 2. Filling structure; 201. Guide groove; 202. Guide slider; 203. Contact block; 204. Connecting rod; 205. Oil chamber; 206. Piston; 207. Oil pipe; 3. Backlash eliminating gear; 4. Rolling bearing; 5. Driven drive shaft; 6. Driving gear; 7. Driving drive shaft. DETAILED DESCRIPTION

[0023] The present invention will be further described below with reference to the accompanying drawings and implementation examples.

[0024] Please refer to Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 and Figure 5 ,in, Figure 1 A schematic structural diagram of a preferred embodiment of a backlash-free meshing gear provided by the present invention; Figure 2 for Figure 1 The schematic diagram of the structure of the driven gear meshing with the driving gear is shown; Figure 3 for Figure 1 The schematic structural diagram of the driven gear shown in front section; Figure 4 for Figure 1 The schematic diagram of the structure of the back side clearance elimination gear is shown; Figure 5 for Figure 3 The schematic structural diagram of structure A shown includes a backlash-free meshing gear, including a driven gear 1, and a backlash-eliminating gear 3 is provided on the front face of the driven gear 1 through a filling structure 2;

[0025] The filling structure 2 includes a number of guide grooves 201 equidistantly arranged on the front face of the driven gear 1, a guide slider 202 is slidingly arranged inside the several guide grooves 201, a side clearance eliminating gear 3 is arranged on the front face of the several guide sliders 202, a contact block 203 is arranged at both ends of the interior of the several guide grooves 201, a connecting rod 204 is inserted at the ends of the several contact blocks 203 away from each other, and the ends of the several connecting rods 204 away from each other pass through the corresponding guide grooves 201 and extend to the oil chamber 205 opened correspondingly inside the driven gear 1, and a piston 206 is arranged at the ends of the several connecting rods 204 away from each other.

[0026] It should be noted that: the driving gear 6 is engaged with the driven gear 1, and the driving gear 6 is staggered and engaged with the gear 3 to eliminate the side clearance. Several guide sliders 202 squeeze the contact block 203 on one side. The contact block 203 transmits the impact force it receives to the piston 206 through the connecting rod 204, fully receiving the reaction force of the oil inside the oil chamber 205 to perform a buffering behavior.

[0027] In the specific implementation process, refer to Figure 3 and Figure 5 As shown, an oil pipe 207 is provided between two oil cavities 205 located at both ends of the same guide groove 201 among the plurality of oil cavities 205 .

[0028] It should be noted that the pressure exerted on the contact block 203 on one side is converted into a downward pressure action of the contact block 203 on the other side through the oil pipe 207, so as to eliminate the side clearance. The teeth on the 3rd side of the gear are tightly attached to the non-working surface of the teeth on the 6th side of the driving gear, thereby eliminating the side clearance.

[0029] In the specific implementation process, refer to Figure 2 and Figure 5As shown, the plurality of guide slots 201 , the plurality of guide sliders 202 , the plurality of contact blocks 203 , the plurality of connecting rods 204 , the plurality of oil chambers 205 , and the plurality of pistons 206 are all in the shape of arcs at the same angle.

[0030] In the specific implementation process, refer to Figure 1 and Figure 2 As shown, a rolling bearing 4 is inserted into the interior of the backlash eliminating gear 3, a driven drive shaft 5 is inserted into the interior of the rolling bearing 4, one end of the driven drive shaft 5 is fixedly inserted into the driven gear 1, and the driven gear 1 and the bottom end of the backlash eliminating gear 3 are meshed with the same driving gear 6, and a driving drive shaft 7 is fixedly inserted into the interior of the driving gear 6.

[0031] It should be noted that the active drive shaft 7 controls the active gear 6 to rotate, and the active gear 6 engages with the driven gear 1. The backlash eliminating gear 3 can flexibly contact the teeth of the active gear 6 on the left and right sides, which is convenient for filling the gap in two directions.

[0032] The working principle of the backlash-free meshing gear provided by the utility model is as follows:

[0033] During use, the active drive shaft 7 controls the active gear 6 to rotate, the active gear 6 meshes with the driven gear 1, and the active gear 6 is staggered and meshed with the backlash elimination gear 3. Several guide sliders 202 squeeze the contact block 203 on one side. The contact block 203 transmits the impact force it receives to the piston 206 through the connecting rod 204, fully receiving the reaction force of the oil in the oil chamber 205, and performs a buffering behavior. The pressure received by the contact block 203 on one side is converted into a downward pressure behavior of the contact block 203 on the other side through the oil pipe 207, so as to achieve the goal of eliminating the backlash. The teeth on the side of the gear 3 are tightly attached to the non-working surface of the teeth on the side of the active gear 6, thereby eliminating the backlash.

[0034] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the description and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A backlash-free meshing gear, comprising a driven gear (1), characterized in that: The front face of the driven gear (1) is provided with a backlash eliminating gear (3) via a filling structure (2); The filling structure (2) comprises a plurality of guide slots (201) equidistantly arranged on the front face of the driven gear (1); a plurality of guide slots (201) are provided with guide sliders (202) slidingly arranged inside; a plurality of guide sliders (202) are provided with the side clearance eliminating gear (3) on the front face; a plurality of guide slots (201) are provided with contact blocks (203) at both ends inside; a plurality of contact blocks (203) are provided with connecting rods (204) at ends away from each other; a plurality of connecting rods (204) are provided with pistons (206) at ends away from each other.

2. A backlash-free meshing gear according to claim 1, characterized in that: An oil pipe (207) is provided between two of the oil cavities (205) located at both ends of the same guide slot (201) in the plurality of oil cavities (205).

3. The backlash-free meshing gear according to claim 1, characterized in that: The plurality of guide slots (201), the plurality of guide sliders (202), the plurality of contact blocks (203), the plurality of connecting rods (204), the plurality of oil chambers (205), and the plurality of pistons (206) are all in the shape of arcs with the same angle.

4. The backlash-free meshing gear according to claim 1, characterized in that: A rolling bearing (4) is inserted into the interior of the backlash eliminating gear (3), a driven drive shaft (5) is inserted into the interior of the rolling bearing (4), and one end of the driven drive shaft (5) is fixedly inserted into the driven gear (1).

5. The backlash-free meshing gear according to claim 1, characterized in that: The driven gear (1) and the bottom end of the backlash eliminating gear (3) are meshed with a same driving gear (6).

6. The backlash-free meshing gear according to claim 5, characterized in that: A driving drive shaft (7) is fixedly inserted into the interior of the driving gear (6).

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