JPH04128568U - gear system - Google Patents

Abstract

(57) [Summary] [Purpose] To substantially eliminate backlash in a gear device composed of spur gears and reduce rattling noise caused by rotational fluctuations. [Structure] Teeth 5 and 6 are provided between the main gear 2 and the auxiliary gear 4 that mesh with the same mating gear 1, and a spring 9 is provided to bias these teeth 5 and 6 into meshing with each other. The two-scratch 10 is configured by providing the tooth scratch 10. As the engagement depth of the tooth clutch 10 increases due to the reaction force of the spring 9, the auxiliary gear 4 is rotated relative to the main gear 2 by the meshing guidance action of the teeth 5 and 6, so that the teeth 11 of the main gear 2 and the auxiliary The gap 13 between the teeth 12 of the gear 4 is increased, and the teeth 5 and 6 of the main gear 2 and the auxiliary gear 4 are aligned with the teeth 15 of the mating gear 1.
Create a no-backlash condition by sandwiching the

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

This invention substantially eliminates the backlash between gears that mesh with each other and allows rotational change. This relates to a gear device that can reduce rattling noise caused by movement. Ru.

0002

[Conventional technology]

Conventional gear devices of this type are disclosed in Japanese Utility Model Application Publication No. 57-179643 or There is one such as that seen in Japanese Patent Application Laid-Open No. 62-67364. This is the other tooth The wheel, main gear, and auxiliary gear are composed of helical gears, and the auxiliary gear slides on the main gear. Both gears are engaged and held together so that they can move, and then meshingly engages both gears with the same mating gear. The phase of the teeth of the main gear and the auxiliary gear can be adjusted by biasing them toward or away from each other with a spring. By shifting, the teeth of the main gear and auxiliary gear will sandwich the teeth of the mating gear. This is what I did.

0003 In such a gear device, the biasing force of a spring is used to connect the main gear and the auxiliary gear. Because the teeth of the mating gear are sandwiched between the teeth of the mating gear, backlash can be reduced to virtually zero. This can reduce rattling noise caused by rotational fluctuations, but if the gear axis and teeth are flat, There was a problem that it could not be applied to spur gears that were in rows.

0004

[Problem that the idea aims to solve]

The problem of this invention is that the mating gear, main gear, and auxiliary gear are spur gears. We propose a gear device that can reduce rattling noise caused by rotational fluctuations even when It is about providing.

[0005]

[Means to solve the problem]

In order to solve the above problems, the present invention has developed a main body gear and a gear that mesh with the same mating gear. In addition to providing teeth with chevron-shaped irregularities on mutually opposing end surfaces of the auxiliary gears, A spring is provided for holding teeth provided on the end surfaces of the main gear and the auxiliary gear in mutual meshing engagement. By providing a tooth scratch, the tooth scratch due to the biasing force of the spring can be prevented. As the meshing depth of the gear increases, the auxiliary gear is rotated relative to the main gear. It is characterized by increasing the phase shift between the gears.

[0006]

[Effect]

As the engagement depth of the tooth clutch increases due to the biasing force of the spring, This increases the phase shift between the main gear and the auxiliary gear that mesh with the same mating gear. Due to the phase shift, the teeth of the mating gear become sandwiched between the teeth of the main gear and the auxiliary gear. Na Oh, the phase of the teeth of the two-scratch is such that the mating gear is on the driving side and the main gear is on the driven side. In this case, the auxiliary gear is set to rotate forward relative to the main gear. , if the main gear is the driving side and the mating gear is the driven side, the auxiliary gear is is set to rotate relatively backward.

[0007]

【Example】

Embodiments of the present invention will be described in detail below. Figure 1 shows an example of the gear device according to the present invention. FIG. 2 is a cross-sectional view showing the embodiment, and FIG. 2 is a perspective view showing the concept of the tooth scratch part. FIG. 4 is a plan view showing the phase shift between the teeth of the main gear and the auxiliary gear, and FIG. 4 is a front view of FIG. 3. Ru.

[0008] In these figures, the motor is rotated by receiving a driving force from a driving source (not shown). The boss 3 of the main gear 2 that meshes with the mating gear 1 has a boss 3 that meshes with the mating gear 1. An auxiliary gear 4 is attached rotatably and slidably. Note that the mating gear 1, Both the main gear 2 and the auxiliary gear 4 are comprised of spur gears.

[0009] The end face of the main gear 2 on the side of the auxiliary gear 4 and the end face of the auxiliary gear 4 on the side of the main gear 2 Teeth 5 and 6 are formed with chevron-shaped irregularities on the end faces of the two. Also, auxiliary gear Tighten the plate 8 with the bolt 7 to the end of the boss 3 of the main body gear 2 that protrudes outside of the gear 4. Fixed. Then, a disc plate is installed between the plate 8 and the outer surface of the auxiliary gear 4. By moving the auxiliary gear 4 closer to the main gear 2 by the reaction force of the gear 9, the teeth 5, A two-scratch 10 is constituted by meshing and engaging the teeth 6.

0010 The phase of the teeth 5 and 6 changes as the engagement depth of the tooth clutch 10 increases. The auxiliary gear 4 is set to rotate relative to the front of the rotation of the main gear 2. stop Due to this relative rotation of the auxiliary gear 4, the teeth 11 of the main gear 2 and the teeth 12 of the auxiliary gear 4 are rotated. The size of the deviation 13 is the back gap between the teeth 11 of the main gear 2 and the teeth 15 of the mating gear 1. Even in the same state as the lash 16, the teeth 5 constituting the tooth clutch 10 , 6, a slight clearance 14 is ensured between them.

[0011] In the gear device configured as described above, as the mating gear 1 rotates, the main gear The body gear 2 and the auxiliary gear 4 are rotationally driven, and as the body gear 2 rotates, as shown in the figure. No shaft is rotationally driven.

0012 The auxiliary gear 4 is biased toward the main gear 2 by the reaction force of the disc spring 9, and as a result, Then, the tooth clutch 10 is compensated by receiving the guiding action due to the meshing of the teeth 5 and 6. The auxiliary gear 4 is held in relative rotation at the front of the rotation. Therefore, as shown in Figures 3 and 4, The teeth 12 of the auxiliary gear 4 move forward of the teeth 11 of the main gear 2, and the teeth of the mating gear 1 move forward. It comes into contact with the tooth surface on the anti-meshing side of No. 15.

[0013] Here, the teeth 11 of the main gear 2 are in contact with the tooth surfaces on the meshing side of the teeth 15 of the mating gear 1. has been done. Therefore, the teeth 15 of the mating gear 1 are the same as the teeth 11 of the main gear 2 and the auxiliary gear 4. Due to the pinching action of the teeth 12, the entire structure is free of so-called backlash. state.

[0014] On the other hand, if reverse torque is applied to mating gear 1 due to rotational fluctuation, this reverse torque acts on the auxiliary gear 4. Then, the tooth clutch 1 resists the biasing force of the disc spring 9. Slip occurs between the meshing surfaces of teeth 5 and 6 that make up the gear 0, and the auxiliary gear 4 rotates relative to the main body gear 2 in the rotational backward direction.

[0015] In this way, the auxiliary gear 4 is moved relatively backward by an amount corresponding to the deviation 13. When rotated, the teeth 15 of the mating gear 1 come into contact with the teeth 11 of the main gear 2. However, The reverse torque generated in the mating gear 1 is damped by the disc spring 9 via the auxiliary gear 4. It will be added to the main body gear 2 while receiving it.

[0016] Therefore, the impact force accompanying the reverse torque generated on the mating gear 1 is applied to the main gear 2. This reduces the so-called rattling noise. Note that the reverse torque is small. If it becomes too small, the auxiliary gear 4 will come into contact with the main gear 2 due to the pressing action of the reaction force of the disc spring 9. The auxiliary gear 4 moves close to the auxiliary gear 4 due to the meshing guidance action of the teeth 5 and 6 that constitute the tooth clutch 10. rotates forward again and returns to the no-backlash state.

[0017] FIG. 5 is a sectional view showing another embodiment of the present invention. In this embodiment, the main body gear 2 on the opposing surface of the auxiliary gear 4 and the plate 8 which is tightened and fixed to the end surface of the boss 3 with bolts 7. By forming the teeth 5 and 6, there is no tooth scrap between the main gear 2 and the auxiliary gear 4. 10 is indirectly interposed.

[0018] By providing a disc spring 9 between the main gear 2 and the auxiliary gear 4, this The reaction force of the disc spring 9 urges the auxiliary gear 4 away from the main gear 2 to create the tooth clutch 10. are held in meshing engagement, thereby causing the auxiliary gear 4 to rotate forwardly relative to the main gear 2. I'm trying to rotate it.

[0019] Therefore, in this embodiment, if teeth are provided on the auxiliary gear 4 and the plate 8, This makes it possible to simplify the shape of the main gear 2, and also to simplify the shape of the main gear 2 and the auxiliary gear. There is an advantage that the disc spring 9 can be protected by being sandwiched between the gear 4 and the disc spring 9.

[0020] In the above embodiment, the auxiliary gear 4 is moved using a compact disc spring with a large biasing force (reaction force). Although the main body gear 2 is biased toward or away from the body gear 2, it is also possible to use a spring with a different structure. You can also In addition, in the embodiment, the mating gear 1 is on the driving side and the main gear 2 is on the driven side. A certain case is explained, but the main gear 2 is on the driving side and the mating gear 1 is on the driven side. If this is the case, provide teeth 5 and 6 with a phase that allows the auxiliary gear 4 to rotate relatively backward. The two-scratch 10 may be configured in this way.

[0021] Furthermore, in the embodiment, the mating gear 1, the main gear 2, and the auxiliary gear 4 are composed of spur gears. This example explains the case where these gears are configured with helical gears. You can also do that.

[0022]

[Effect of the idea]

As is clear from the above explanation, according to the present invention, it is possible to mesh with the same mating gear. A tooth clutch is directly or indirectly interposed between the main gear and the auxiliary gear. By using the meshing guide action of the teeth that make up this tooth clutch, the auxiliary teeth The car rotates relative to the main gear to create a no-backlash condition. Because of the It is also possible to effectively reduce rattling noise.

[Brief explanation of drawings]

FIG. 1 is a sectional view showing an embodiment of a gear device according to the present invention.

FIG. 2 is a perspective view showing the concept of the tooth clutch portion in FIG. 1;

FIG. 3 is a plan view showing a phase shift between the teeth of the main gear and the auxiliary gear.

FIG. 4 is a front view of FIG. 3;

FIG. 5 is a sectional view showing another embodiment of the gear device according to the present invention.

[Explanation of symbols]

1 Mating gear 2 Body gear 3 Boss 4 Auxiliary gear 5 Teeth 6 Teeth 7 bolts 8 plate 9 Belleville spring 10 Tooth Scratch 11 Teeth 12 Teeth 13 Misalignment 14 Clearance 15 Teeth 16 Backlash

Claims (1)

[Scope of utility model registration request] [Claim 1] By urging a main gear and an auxiliary gear that mesh with the same mating gear toward or away from each other with a spring,
The gear device is configured such that the teeth of the mating gear are sandwiched between the teeth of the main gear and the teeth of the auxiliary gear by the biasing force of the spring, wherein the main gear and the auxiliary gear have chevron-shaped irregularities on mutually opposing end surfaces. By providing teeth and holding the teeth provided on the end faces of the main gear and the auxiliary gear in meshing engagement with each other by the biasing force of the spring, the engagement depth of the tooth clutch due to the biasing force of the spring can be reduced. A gear device characterized in that an auxiliary gear is rotated relative to a main gear as the gear increases in size, thereby increasing a phase shift between the two gears.