Anti-backlash mechanism

Abstract

The present invention discloses a backlash elimination mechanism, comprising: a spindle component, a first gear is formed on the head of the spindle component; a sleeve component, which is sleeved outside the spindle component, a second gear is formed on the head of the sleeve component, the first gear is coaxial with the second gear and arranged front to back in parallel, the first meshing gear and the second gear are both used to mesh with the tooth component of an external device at the same time; a driven component, which is sleeved outside the sleeve component and is used to rotate coaxially with the sleeve component; an adjustment mechanism, which is arranged at the spindle component and the tail of the sleeve component, the adjustment mechanism adjusts the misalignment between the outer teeth of the first gear and the outer teeth of the second gear by changing the relative rotation angle between the spindle component and the sleeve component.

Description

Technical Field

[0001] The invention relates to the technical field of transmission, and in particular to a backlash eliminating mechanism for gear transmission. Background Art

[0002] As is known to all, two gears can transmit rotational motion and power by meshing, such as Figure 1 As stated, the Figure 1 The figure shows the state when the gear and the inner teeth of the gear ring are meshing. It can be seen from the figure that there is a meshing gap when the outer teeth of the gear and the inner teeth of the gear ring are meshing. This meshing gap is mostly caused by principles such as processing errors. Under lower transmission accuracy requirements, this meshing gap is allowed to exist. However, under higher transmission accuracy requirements, this meshing gap will cause the following problems:

[0003] When one gear is braked, the other gear meshing with the gear can still produce a large amount of circumferential movement.

[0004] In the prior art, the meshing clearance is usually reduced as much as possible by improving the gear processing accuracy. However, this method significantly increases the gear processing cost. Summary of the invention

[0005] In view of the above technical problems existing in the prior art, an embodiment of the present invention provides a backlash eliminating mechanism.

[0006] In order to solve the above technical problems, the technical solution adopted in the embodiments of the present invention is:

[0007] A backlash elimination mechanism, comprising:

[0008] A spindle component, a head of which is formed with a first gear;

[0009] A sleeve component is sleeved outside the core shaft component, a second gear is formed on the head of the sleeve component, the first gear and the second gear are coaxial and arranged side by side, and the first gear and the second gear are used to mesh with the tooth component of the external device at the same time;

[0010] A driven component, which is sleeved outside the shaft sleeve component and is used to rotate coaxially with the shaft sleeve component;

[0011] An adjustment mechanism is arranged at the tail of the core shaft component and the sleeve component, and the adjustment mechanism adjusts the misalignment between the outer teeth of the first gear and the outer teeth of the second gear by changing the relative rotation angle of the core shaft component and the sleeve component.

[0012] Preferably, the adjustment mechanism comprises:

[0013] A first adjusting component, which is fixed to the tail of the sleeve component, and an embedding groove is formed on the first adjusting component;

[0014] a second adjusting component, which is fixed to the tail of the spindle component and is located in the embedding groove, and the second adjusting component has a radial protrusion;

[0015] The adjusting screws include at least two adjusting screws, wherein at least two adjusting screws pass through the first adjusting component from both sides of the radial protrusion and abut against the radial protrusion; the rotation angle of the radial protrusion is adjusted by coordinating the screwing of at least two adjusting screws to change the relative rotation angle between the core shaft component and the sleeve component.

[0016] Preferably,

[0017] The first adjustment component is sleeved on the tail of the shaft sleeve component, and the first adjustment component and the shaft sleeve component are connected by a key;

[0018] The second adjustment component is sleeved on the tail of the core shaft component, and the second adjustment component is connected to the core shaft component by a key.

[0019] Preferably, the anti-backlash mechanism further includes an anti-slip assembly, and the anti-slip assembly includes:

[0020] a stop plate, which is arranged on the outer side of the first adjusting component;

[0021] A bolt passes through the stop plate and is screwed into the end face of the tail of the core shaft component. By tightening the bolt, the stop plate restricts the first adjustment component from coming out of the tail of the sleeve component.

[0022] Preferably, a bushing is arranged between the tail of the sleeve component and the tail of the core shaft component; and a bearing is arranged between the head of the sleeve component and the head of the core shaft component.

[0023] Preferably, the second adjustment component has two symmetrically arranged radial protrusions, and each of the radial protrusions corresponds to two adjustment screws.

[0024] Preferably, the driven component is a cylindrical gear.

[0025] Preferably, the driven component is a worm gear.

[0026] Preferably, the first gear is integrally formed with the core shaft component; and the second gear is integrally formed with the sleeve component.

[0027] Preferably, the toothed component comprises a spur gear or a ring gear.

[0028] Compared with the prior art, the beneficial effects of the backlash elimination mechanism disclosed in the present invention are:

[0029] 1. The present invention eliminates or reduces the tooth meshing clearance by changing the tooth width of the equivalent teeth formed by the teeth of the two gears, thereby improving the transmission accuracy with components such as the ring gear.

[0030] 2. By providing a core shaft component and a sleeve component that are connected to each other, and providing an adjustment mechanism at the tail of both, the tooth width of the equivalent teeth formed by the two gears can be adjusted by the adjustment mechanism, thereby simplifying the adjustment process.

[0031] It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention.

[0032] This summary of various implementations or examples of the technology described in this disclosure is not a comprehensive disclosure of the entire scope or all features of the disclosed technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In the drawings, which are not necessarily drawn to scale, the same reference numerals may describe similar parts in different views. The same reference numerals with letter suffixes or different letter suffixes may represent different instances of similar parts. The accompanying drawings generally illustrate various embodiments by way of example and not limitation, and together with the specification and claims, are used to illustrate the embodiments of the invention. When appropriate, the same reference numerals are used throughout the drawings to refer to the same or similar parts. Such embodiments are illustrative and are not intended to be exhaustive or exclusive embodiments of the present apparatus or method.

[0034] Figure 1 It is the meshing state of the gear and the gear ring in the prior art.

[0035] Figure 2 A schematic diagram of the three-dimensional structure of the backlash elimination mechanism provided in an embodiment of the present invention from one viewing angle.

[0036] Figure 3 A schematic diagram of the three-dimensional structure of the backlash elimination mechanism provided in an embodiment of the present invention from one viewing angle.

[0037] Figure 4 A front side view of an anti-backlash mechanism provided by an embodiment of the present invention.

[0038] Figure 5 A three-dimensional cutaway view of an anti-backlash mechanism provided in an embodiment of the present invention.

[0039] Figure 6 A planar cross-sectional view of an anti-backlash mechanism provided in an embodiment of the present invention.

[0040] Reference numerals:

[0041] 10- spindle component; 11- first gear; 20- sleeve component; 21- second gear; 30- adjustment mechanism; 31- first adjustment component; 311- embedded groove; 32- second adjustment component; 321- radial protrusion; 33- adjustment screw; 34- key; 35- anti-slip assembly; 351- stop plate; 352- bolt; 40- driven component; 51- bushing; 52- bearing; 60- gear ring. DETAILED DESCRIPTION

[0042] In order to make the purpose, technical solution and advantages of the embodiment of the present invention clearer, the technical solution of the embodiment of the present invention will be clearly and completely described below in conjunction with the drawings of the embodiment of the present invention. Obviously, the described embodiment is a part of the embodiment of the present invention, not all of the embodiments. Based on the described embodiment of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0043] Unless otherwise defined, the technical terms or scientific terms used in the present invention should be understood by people with ordinary skills in the field to which the present invention belongs. The words "first", "second" and similar words used in the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. "Include" or "comprise" and similar words mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0044] In order to keep the following description of the embodiments of the present invention clear and concise, detailed descriptions of well-known functions and well-known components are omitted.

[0045] like Figures 1 to 6 As shown, an embodiment of the present invention discloses a backlash eliminating mechanism, which is used to eliminate and reduce the meshing clearance in the gear meshing transmission. The backlash eliminating mechanism includes: a core shaft component 10, a sleeve component 20, a driven component 40, an adjustment mechanism 30 and an anti-slip assembly 35.

[0046] A first gear 11 is formed at the head of the core shaft component 10 (only part of the teeth are shown in the accompanying drawings; in fact, the teeth of the first gear 11 are distributed all around). The first gear 11 can be installed on the head of the core shaft component 10 in an assembled manner. Preferably, the first gear 11 and the core shaft component 10 are integrally formed.

[0047] The sleeve component 20 is sleeved on the outside of the core shaft component 10 and allows the angle adjustment between the sleeve component 20 and the core shaft component 10. The head of the shaft body component is formed with a second gear 21 (only part of the teeth are shown in the accompanying drawings, and in fact, the teeth of the second gear 21 are distributed around a full circle). The second gear 21 can be installed on the head of the sleeve component 20 in an assembled manner. Preferably, the second gear 21 and the core shaft component 10 are processed as one piece.

[0048] The first gear 11 is coaxial with the second gear 21 and arranged in parallel. The first gear 11 is located in front of the second gear 21. The teeth of the first gear 11 and the teeth of the second gear 21 have the same module. The first gear 11 and the second gear 21 are simultaneously meshed with the ring gear 60 (only part of the teeth are shown in the figure, in fact, the teeth of the ring gear 60 are fully distributed), such as a milling cutter device or a drill device of a machine tool fixed on the ring gear 60.

[0049] A bearing 52 is installed between the head of the sleeve component 20 and the core shaft component 10, and a bushing 51 is installed between the tail of the sleeve component 20 and the core shaft component 10. The bushing 51 and the bearing 52 support the sleeve component 20 and the core shaft component 10 so that there is no radial movement between the sleeve component 20 and the core shaft component 10.

[0050] The driven component 40 is sleeved outside the shaft sleeve component 20, and the plate-like member of the external device is also sleeved outside the shaft sleeve component 20 by means of a bearing. The external device, such as a gear box, is used to keep the entire anti-backlash mechanism in the assembly position. The driven component 40, such as a gear or a worm gear, is sleeved outside the shaft sleeve component 20 and fixedly connected to the shaft sleeve component 20, so that the shaft sleeve component 20 can rotate synchronously with the driven component 40, thereby driving the first gear 11 and the second gear 21 to synchronously mesh with the ring gear 60.

[0051] The adjustment mechanism 30 includes: a first adjustment component 31, a second adjustment component 32 and an adjustment screw 33. The first adjustment component 31 is roughly disc-shaped, and the first adjustment component 31 is sleeved and connected to the tail of the sleeve component 20 by a key; the outer disc surface of the first adjustment component 31 has an embedding groove 311 that accommodates the second adjustment component 32 and allows the second adjustment component 32 to have a certain amount of rotation adjustment. The second adjustment component 32 is located in the embedding groove 311, and the second adjustment component 32 is sleeved on the tail of the spindle component 10 and connected by a key 34; the second adjustment component 32 has a symmetrically arranged radial protrusion 321, and the embedding groove 311 allows the radial protrusion 321 to have a certain amount of rotation adjustment. Two adjustment screws 33 are provided on both sides of each radial protrusion 321, and the two adjustment screws 33 penetrate the first adjustment component 31 and abut against the two side surfaces of the radial protrusion 321, and the adjustment screws 33 are threadedly matched with the first adjustment component 31. In this way, the rotation angle of the radial protrusion 321 can be adjusted by cooperatively screwing the adjustment screws 33 on both sides of each radial protrusion 321. For example, the second adjustment component 32 can be rotated clockwise by a certain angle by retracting the adjustment screw 33 on the right side of the upper radial protrusion 321 and advancing the adjustment screw 33 on the left side. In this way, the adjustment mechanism 30 can adjust the relative rotation angle of the first gear 11 and the second gear 21 by means of the sleeve component 20 and the core shaft component 10.

[0052] The anti-slip assembly 35 includes: a stop plate 351 and a bolt 352, wherein the stop plate 351 is arranged on the outside of the first adjustment component 31; the bolt 352 passes through the stop plate 351 and is screwed into the end face of the tail of the core shaft component 10, and by tightening the bolt 352, the stop plate 351 limits the first adjustment component 31 and the second adjustment component 32 from slipping out from the tail of the sleeve component 20.

[0053] The working principle of the anti-backlash mechanism provided by the present invention is introduced below:

[0054] Before an external driving mechanism, such as a worm, drives the driven component 40 (worm wheel), the adjustment mechanism 30 is used to adjust the misalignment of the teeth of the first gear 11 and the second gear 21, that is, to make one side tooth surface (such as the left tooth surface) of the teeth of the first gear 11 as close to or as close to one side tooth surface (right tooth surface) of the teeth of the ring gear 60 as possible, and to make the other tooth surface (right tooth surface) of the teeth of the second gear 21 as close to or as close to the other side tooth surface (left tooth surface) of the teeth of the ring gear 60 as possible; or to say, the teeth of the first gear 11 and the teeth of the second gear 21 cooperate to form equivalent teeth that fit the inner teeth of the gears, and the meshing clearance with the inner teeth of the ring gear 60 is eliminated or reduced by adjusting the tooth width of the equivalent teeth.

[0055] The advantages of the backlash elimination mechanism provided by the present invention are:

[0056] 1. The present invention eliminates or reduces the tooth meshing clearance by changing the tooth width of the equivalent teeth formed by the teeth of the two gears, thereby improving the transmission accuracy with components such as the ring gear 60.

[0057] 2. By providing a core shaft component 10 and a sleeve component 20 that are connected to each other, and providing an adjustment mechanism 30 at the tail of both, the tooth width of the equivalent teeth formed by the two gears can be adjusted by the adjustment mechanism 30, thereby simplifying the adjustment process.

[0058] In addition, although exemplary embodiments have been described in the present invention, the scope includes any and all embodiments based on the present invention with equivalent elements, modifications, omissions, combinations (e.g., various embodiments intersecting schemes), adaptations or changes. The elements in the claims will be interpreted broadly based on the language adopted in the claims, and are not limited to the examples described in this specification or during the implementation of this application, and their examples will be interpreted as non-exclusive. Therefore, this specification and examples are intended to be considered as examples only, and the true scope and spirit are indicated by the following claims and the full scope of their equivalents.

[0059] The above description is intended to be illustrative rather than restrictive. For example, the above examples (or one or more of them) can be used in combination with each other. For example, a person of ordinary skill in the art can use other embodiments when reading the above description. In addition, in the above-mentioned specific embodiments, various features can be grouped together to simplify the present invention. This should not be interpreted as an intention that a disclosed feature that is not required to be protected is necessary for any claim. On the contrary, the subject matter of the present invention may be less than all the features of a specific disclosed embodiment. Thus, the following claims are incorporated into the specific embodiments as examples or embodiments, wherein each claim is independently used as a separate embodiment, and it is considered that these embodiments can be combined with each other in various combinations or arrangements. The scope of the present invention should be determined with reference to the attached claims and the full scope of equivalent forms granted by these claims.

[0060] The above embodiments are only exemplary embodiments of the present invention and are not intended to limit the present invention. The protection scope of the present invention is defined by the claims. Those skilled in the art may make various modifications or equivalent substitutions to the present invention within the essence and protection scope of the present invention, and such modifications or equivalent substitutions shall also be deemed to fall within the protection scope of the present invention.

Claims

1. A backlash elimination mechanism, characterized in that: include: A spindle component, a head of which is formed with a first gear; A sleeve component is sleeved outside the core shaft component, a second gear is formed on the head of the sleeve component, the first gear and the second gear are coaxial and arranged side by side, and the first gear and the second gear are used to mesh with the tooth component of the external device at the same time; A driven component, which is sleeved outside the shaft sleeve component and is used to rotate coaxially with the shaft sleeve component; An adjustment mechanism, which is arranged at the tail of the mandrel component and the sleeve component, and the adjustment mechanism adjusts the misalignment between the outer teeth of the first gear and the outer teeth of the second gear by changing the relative rotation angle between the mandrel component and the sleeve component; The adjustment mechanism comprises: A first adjusting component, which is fixed to the tail of the sleeve component, and an embedding groove is formed on the first adjusting component; a second adjusting component, which is fixed to the tail of the spindle component and is located in the embedding groove, and the second adjusting component has a radial protrusion; The adjusting screws include at least two adjusting screws, wherein at least two adjusting screws penetrate the first adjusting component from both sides of the radial protrusion and abut against the radial protrusion; the rotation angle of the radial protrusion is adjusted by coordinating and screwing at least two adjusting screws to change the relative rotation angle between the core shaft component and the sleeve component; The first adjustment component is sleeved on the tail of the shaft sleeve component, and the first adjustment component and the shaft sleeve component are connected by a key; The second adjustment component is sleeved on the tail of the spindle component, and the second adjustment component is connected to the spindle component by a key; The anti-backlash mechanism further includes an anti-slip assembly, which includes: a stop plate, which is arranged on the outer side of the first adjusting component; a bolt, which passes through the stop plate and is screwed into the end surface of the tail of the core shaft component, and by tightening the bolt, the stop plate restricts the first adjustment component from coming out of the tail of the sleeve component; A bushing is arranged between the tail of the sleeve component and the tail of the core shaft component; and a bearing is arranged between the head of the sleeve component and the head of the core shaft component.

2. The backlash elimination mechanism according to claim 1, characterized in that: The second adjustment component has two radial protrusions that are symmetrically arranged, and each of the radial protrusions corresponds to two adjustment screws.

3. The backlash elimination mechanism according to claim 1, characterized in that: The driven component is a cylindrical gear.

4. The backlash elimination mechanism according to claim 1, characterized in that: The driven component is a worm gear.

5. The backlash elimination mechanism according to claim 1, characterized in that: The first gear is integrally formed with the core shaft component; the second gear is integrally formed with the sleeve component.

6. The backlash elimination mechanism according to claim 1, characterized in that: The toothed component comprises a cylindrical gear or a ring gear.

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