JPH04122249U - Electric stay retractable mirror - Google Patents

Abstract

(57) [Summary] [Purpose] It has a large degree of design freedom for mounting on the vehicle body, and has design margin for the dimensions and arrangement of component parts.
The purpose of the present invention is to provide an electric stay retractable mirror that can be easily installed. [Structure] The drive unit 11 of the drive device 5 is arranged laterally,
A drive bevel gear 17 is fitted onto the output shaft 15 of the drive unit 11, and is positioned between the drive unit 11 and the driven unit 25 of the drive device 5, and meshes with the drive bevel gear 17 and the clutch gear 23 of the driven unit 25 at the same time. An intermediate bevel gear 31 and an intermediate shaft 32 loosely fitted to the intermediate bevel gear 31 are provided, and the output shaft 15 is connected to the intermediate shaft 32.
By forming the bearing part 33 that pivotally supports the bracket case 4, the height h of the bracket case 4 is reduced, and the degree of freedom in designing for mounting on the vehicle body is increased.In addition, the space of the bracket case 4 is increased, and the dimensions and arrangement of the component parts, etc. are increased. It is possible to realize an excellent electric stay retractable mirror that has a design margin for and simplifies installation.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

This invention relates to electric stay retractable mirrors installed on large vehicles, etc. Ru.

0002

[Conventional technology]

As this type of electric stay retractable mirror, the base end of the stay that supports the mirror is This stay is rotatably supported within a bracket case that is attached to the vehicle body. The mirror is rotated by a drive motor installed inside the racket case. It is known what has been done.

0003 However, in such electric stay retractable mirrors, there is a mirror mirror at the tip. A relatively long stay with a body and a mirror body attached is connected to a relatively small bra. Since it is supported by a bracket case, there is a slight play in the bracket case on the stay tip side. There is a risk that the mirror will vibrate due to magnification. In particular, the base end of the stay has a drive The radial load due to motor power transmission is applied, and the mirror body on the stay tip side Because the bracket is subject to wind resistance, play may occur between the bracket case and the stay. Moreover, since the stay is directly rotated by the drive motor, the drive motor etc. There was a drawback that the drive device became large.

0004 Therefore, the stay can be supported in a stable state without wobbling, and the stay can be supported stably without wobbling. An electric stay retractable mirror was developed that made it possible to downsize the moving device. It has been filed as No. 85 (Utility Model Application No. 63-4750). Figure 3 shows this electric stay retractable type FIG. 4 is a side view of an example of a mirror, and FIG. 4 is a longitudinal sectional view showing its internal structure.

[0005] In this electric stay retractable mirror, the tip of the stay 1 is bent into a substantially crank shape. A mirror body 2 that holds the mirror body is attached to the end, and the base of the stay 1 The end part is incorporated into a bracket case 4 attached to the vehicle body 3, and the internal drive The stay 1 is driven by the device 5. The drive device 5 reduces the output of the drive motor 51. Through the speed gear mechanism 52, clutch mechanism 53, drive gear 54, and driven gear 55, It is configured to conduct and rotate the support shaft 6 that supports the tee 1. Support shaft 6 The reduced diameter portion 65 at the lower end fits into the driven gear 55 with a certain play in the rotational direction. The rotation of the driven gear 55 is transmitted to the support shaft 6 after this play period has passed. Ru.

[0006] Facing the flange portion 64 at the upper end of the support shaft 6 and the upper lid 42 of the bracket case 4 A first locking means 61 is attached to the lower cover of the bracket case 4 and the driven gear 55. A second locking means 62 is provided at a portion facing 43. In this illustrated example, the first The locking means 61 is a combination of a groove 64a and a convex portion 42b, and the second locking means 62 is a combination of a groove 64a and a convex portion 42b. It is a combination of a recess 55a, a ball 55b, and a hole 43a, and is normally a coil spring. These are engaged by the bias of 8, and the support shaft 6 and therefore the stay 1 are prevented from rotating. He is being detained.

[0007] When the driven gear 55 is rotated by the drive of the drive device 5, the inclined recess of the ball 55b The second locking means 62 resists the bias of the spring 8 by riding on the portion 55a. At the same time, the support shaft 6 is pushed up and the first locking means 61 is disengaged. In both cases, the driven gear 55 transmits the rotation to the support shaft 6 after the play in the rotational direction. Then, the stay 1 rotates and moves the mirror body 2.

[0008] A clutch mechanism 53 provided on the driving side connects the upper surface of the driving gear 54 and the pressing plate 56. The uneven portions 54a and 54b formed on the lower surface respectively allow the coil spring 57 to be attached. During driving, the drive motor 51 and reduction gear are engaged in this engaged state. The output of the mechanism 52 is transmitted from the pressing plate 56 to the driving gear 54, and the driven gear is transmitted as described above. 55. External force is applied to mirror body 2, and a large load is applied to stay 1. When rotational force is transmitted from the driven gear 55 to the driving gear 54, the spring The clutch mechanism 53 is disengaged against the bias of the ring 57, and the reduction gear mechanism 52 is No load is applied, and accidents such as burnout of the drive motor 51 are prevented.

[0009] As mentioned above, this electric stay retractable mirror is locked by spring force. The support shaft is supported without any play by the locking means provided, and the stay is held in a stable state. can. Also, the support shaft that holds and rotates the stay releases the first and second locking means. Since it rotates after being released, it can be driven by a relatively small drive mechanism.

0010 However, in the above-mentioned electric stay retractable mirror, the mirror body When the support shaft is forcibly rotated by an external force on the Since the chain mechanism is installed in the drive gear section, the load is reduced to the drive gear (small gear). Reportedly. For this reason, the design margin for clutch holding torque becomes smaller, and sufficient There may be cases where the buffering effect is not performed. Also, there is a sprocket for clutch engagement on the drive part side. The provision of the ring increases the height of the drive section, which also has the drawback of increasing the size of the device.

[0011] Therefore, by providing a clutch mechanism on the driven part side, the holding torque of the clutch can be reduced. An electric stay retractable mirror that has sufficient design margin and allows the device to be made smaller. The applicant had previously proposed this. Figure 5 shows the bracket of this electric stay retractable mirror. shows the internal structure of the base.

0012 The external structure of this electric stay retractable mirror is similar to that shown in FIG. 3 described above. Also, in Figure 5, the same as or corresponding to those shown in Figures 3 and 4 above. The same reference numerals are given to the parts shown in the drawings. Note that this figure 5 is The left and right sides are reversed from those shown in Figure 4, with the left side being the driving side and the right side being the driven side.

[0013] In the figure, 54 is rotationally driven by a drive motor 51 via a reduction gear mechanism 52. This is the drive gear that is used. Supports the stay 1 and rotatably holds it inside the bracket case 4. A driven gear 50 is fitted to the lower end of the supported support shaft 6. This driven gear 50 is a clamp fitted to the lower end of the support shaft 6 to rotate the support shaft 6. The clutch holder 50a and the boss portion 50b of this clutch holder 50a can be freely rotated. It is loosely fitted and meshes with the drive gear 54, and the flange portion 50c of the clutch holder 50 and a clutch gear 50e engaged by a clutch mechanism 50d. That is, the driven gear 50 clutches the driven gear 55 in the conventional example of FIG. It is divided into two parts, the gear and the clutch holder, and has a clutch mechanism as a buffer mechanism. It is. The clutch holder 50a is fixed at a constant speed like the driven gear 55 of the conventional example. It fits into the reduced diameter portion 65 at the lower end of the support shaft 6 with a rotational play of .

[0014] The clutch mechanism 50d is connected to the upper surface of the flange portion 50c of the clutch holder 50a. A V-shaped groove and a V-shaped protrusion are formed on the lower surface of the clutch gear 50e, and these protrusions When the grooves fit together, a clutch effect is achieved. This clutch mechanism 5 0d is attached to the upper surface of the clutch gear 50e and the inner surface of the bracket case 4. The first coil spring 8a interposed between the spring presser 40 When the clutch is engaged, the clutch is biased in the direction of engagement. A bolt is provided on the bottom surface of the clutch holder 50a. A locking means 62 is provided by fitting the ring 62a into the groove 62c of the base member 62b. This locking means 62 is connected to the upper surface and front of the boss portion 50b of the clutch holder 50a. The second coil spring 8b interposed between the spring presser 40 and the It is biased in the time locking direction. That is, in this configuration, the coil in FIG. Two coil springs 8a and 8b are provided in place of the coil spring 8, and the locking means 6 2 is prevented from applying pressure to the clutch mechanism 50d. .

[0015] When the drive gear 54 is rotationally driven by the drive mechanism, the clutch mechanism 50d is are engaged, and the clutch holder 50a and clutch gear 50e are integrated. It rotates as the driven gear 50, and the ball 62a of the locking means 62 is disengaged from the groove 62c and supported. Rotation is transmitted to the holding shaft 6 to rotate the stay 1 and move the mirror body 2. Mi The stay 1 and therefore the support shaft 6 are forcibly rotated by the external force applied to the roller body 2. In this case, the clutch mechanism 50d is engaged against the bias of the first coil spring 8a. is released, and the clutch holder 50a idles relative to the clutch gear 50e and is driven. Cuts off external force load transmission to the mechanism.

[0016] As mentioned above, in this electric stay retractable mirror, the mirror body is If the stay is forcibly rotated due to force, the clutch mechanism will disengage and the stay will be supported. The holding shaft and clutch holder may spin idly relative to the clutch gear, causing damage to the gears of the drive mechanism. Accidents such as losses are prevented. In addition, the clutch mechanism is installed on the driven side with a large gear diameter. Moreover, since the clutch spring is provided independently, the load received by the clutch is reduced. This reduces clutch wear and increases design tolerance for clutch holding torque. make it big

[0017]

[Problem that the idea aims to solve]

However, in the above conventional configuration, the drive motor 51 and the reduction gear mechanism 52 Since the drive gear 54 and the drive gear 54 are arranged vertically, the height H of the bracket case 4 is is large, the degree of freedom in designing the vehicle body installation is small, and the bracket case 4 There was also insufficient design margin for the dimensions and arrangement of the internal components.

[0018] This invention has a large degree of freedom in design for mounting on the vehicle body, and the dimensions and arrangement of component parts. The purpose is to provide an electric stay retractable mirror that has a design margin for Ru.

[0019]

[Means to solve the problem]

In order to achieve this purpose, the electric stay retractable mirror of this invention has a mirror with a mirror at the tip. The base end of the stay that supports the rack body is rotatably held inside the bracket case. An electric stay retractor that is attached to a fixed support shaft and rotates this support shaft using a drive device. In the type mirror, the drive section of the drive device is arranged horizontally, and the output shaft of the drive section is The drive bevel gear is fitted between the drive part and the driven part of the drive device. It has a configuration with an intermediate bevel gear mechanism that simultaneously engages with the clutch gear of the .

[0020]

[Effect]

This configuration allows the drive part of the drive unit to be placed laterally in the bracket case. The height is reduced, the degree of design freedom for mounting on the vehicle body is increased, and the output to the intermediate shaft is By providing a bearing that supports the shaft, the space in the bracket case increases and the components This allows for design latitude regarding product dimensions and placement, and also simplifies installation. It will be done.

[0021]

【Example】

An embodiment of the present invention will be described below with reference to the drawings. Figure 1 shows the present invention 1 is a sectional view showing the internal structure of the bracket case of the electric stay retractable mirror according to FIG. 2 is a plan view thereof.

[0022] In Fig. 1, 1 is a stay, and the tip part has a mirror body that holds a mirror. is attached, the base end is incorporated into the bracket case 4 attached to the vehicle body, It is driven by an internal drive device 5.

[0023] The drive unit 11 of the drive device 5 receives the output of the drive motor 12 via the reduction gear mechanism 13. and an output shaft 15 that is driven by a bushing 16. and a driving bevel gear 17.

[0024] The driven gear mechanism 20 of the driven part 25 of the drive device 5 is connected to the support shaft 6 that supports the stay 1. A clutch holder fitted into the reduced diameter portion 24 located at the bottom via a bush 27 21 and is loosely fitted into the clutch holder 21, and the clutch is inserted into the clutch holder 21. and a clutch gear 23 engaged by a mechanism 22.

[0025] An intermediate bevel gear mechanism is provided between the drive section 11 and the driven section 25 of the drive device 5. It is. This intermediate bevel gear mechanism is a bevel gear that meshes with the drive bevel gear 17 of the drive section 11. portion 17a, and a spur gear portion 17b that meshes with the clutch gear 23 of the driven portion 25. It consists of an intermediate bevel gear 31 and an intermediate shaft 32 into which the intermediate bevel gear 31 is loosely fitted. Both upper and lower ends of the shaft 32 are pivotally supported by the bracket case 4. And this intermediate axis 32 is formed with a bearing portion 33 that pivotally supports the tip end 15a of the output shaft 15 of the drive portion 11. The tip 15a of the output shaft 15 is connected to this bearing 33 via a bush 18. It has been inserted. Further, an E ring 34 for holding the intermediate bevel gear 31 is attached to the intermediate shaft 32. is installed.

[0026] The operation of the electric stay retractable mirror configured as above is explained below. I will explain.

[0027] When the drive motor 12 of the drive unit 11 of the drive device 5 is driven, this output is decelerated. It is output to the output shaft 15 via the gear mechanism 13, and the drive bevel gear 17 is rotationally driven. . Furthermore, this output is transmitted to the intermediate bevel gear 31 of the intermediate shaft 32, and the output is transmitted to the intermediate bevel gear 31 of the intermediate shaft 32. The clutch gear 23 of the driven portion 25 is rotationally driven via the spur gear portion 17b, and the clutch gear 23 is driven to rotate through the spur gear portion 17b. The support shaft 6 and the stay 1 are connected via the clutch holder 21 engaged by the clutch mechanism 22. is rotated to move the mirror body. In this case, the ball 26 of the locking means is removed from the groove 26a.

[0028] When the mirror body receives external force and the stay 1 and support shaft 6 are forced to rotate. In this case, the clutch mechanism 22 is disengaged in the same manner as in the conventional example described above, and the clutch mechanism 22 is disengaged. The rotor 21 idles relative to the clutch gear 23 and blocks external force load transmission to the drive mechanism. cut off

[0029] As described above, according to this embodiment, the drive unit 11 of the drive device 5 is arranged in the horizontal direction, A drive bevel gear 17 is fitted to the output shaft 15 of the drive unit 11, and the drive unit 11 of the drive device 5 and A drive bevel gear 17 and a clutch gear 23 of the driven part 25 are provided intermediately between the driven part 25 and the driven part 25. An intermediate bevel gear 31 that meshes with the intermediate bevel gear 31 and an intermediate shaft 32 that the intermediate bevel gear 31 loosely fits are provided. By forming a bearing portion 33 for pivotally supporting the output shaft 15 on this intermediate shaft 32, As a result, the height h of the bracket case 4 is reduced, and design freedom regarding mounting on the vehicle body is increased. Also, the space in the bracket case 4 increases, making it easier to adjust the dimensions and arrangement of component parts. It is possible to have a design margin for this, and it is also possible to simplify the installation.

[0030]

[Effect of the idea]

As explained above, the present invention is based on the stay that supports the mirror body at the tip. Attach the end to a support shaft rotatably held within the bracket case, and In the electric stay retractable mirror whose shaft is rotated by a drive device, the drive device The drive unit of the drive unit is arranged horizontally, and a drive bevel gear is fitted to the output shaft of the drive unit. Simultaneously meshes with the drive bevel gear and the clutch gear of the driven part between the drive part and the driven part. By providing an intermediate bevel gear mechanism, the drive section of the drive device can be arranged laterally. This reduces the height of the bracket case and increases the degree of design freedom for mounting on the vehicle body. In addition, by providing a bearing section on the intermediate shaft to support the output shaft, the bracket case can be improved. The increased space allows for greater design latitude in the dimensions and placement of component parts, and This makes it possible to realize an excellent electric stay retractable mirror that is simple to install.

[Submission date] September 30, 1991

[Procedural amendment 1]

[Name of document to be amended] Specification

[Correction target item name] 0023

[Correction method] Change

[Correction details]

The drive section 11 of the drive device 5 is configured such that the output of the drive motor 12 is decelerated. An output shaft 15 driven via a gear mechanism 13 and a drive fitted to this output shaft 15. It is constituted by a moving bevel gear 17.

[Procedural amendment 2]

[Name of document to be amended] Specification

[Correction target item name] 0024

[Correction method] Change

[Correction details]

The driven gear mechanism 20 of the driven part 25 of the drive device 5 rotates the stay 1. The clutch holder 2 is fitted into the reduced diameter portion 24 located at the lower part of the support shaft 6 to be supported. 1, and the clutch holder 21 is loosely fitted into the clutch holder 21. and a clutch gear 23 engaged by a mechanism 22. Lower end of support shaft 6 is supported in a support hole 4c in the lid 4a provided on the lower side of the bracket case 4. ing. A locking means 80 is provided between the base member 4b and the clutch holder 21. is provided. The clutch mechanism 22 is connected to the lower surface of the clutch gear 23 by a clutch. Concave and convex surfaces 21a and 2 are formed on the upper surface of the holder 21 and engage with each other. 3a, the locking means 80 includes an inclined recess 26a formed in the base member 4b, A recess 26b formed in the clutch holder 21, an inclined recess 26a, and a recess 26b. This is a combination of the ball 26 inserted in the

[Procedural amendment 3]

[Name of document to be amended] Specification

[Correction target item name] 0025

[Correction method] Change

[Correction details]

An intermediate bevel gear mechanism is provided between the drive section 11 and the driven section 25 of the drive device 5 . This intermediate bevel gear mechanism includes an intermediate bevel gear 31 having a bevel gear part 17a that meshes with the drive bevel gear 17 of the drive part 11, a spur gear part 17b that meshes with the clutch gear 23 of the driven part 25, and this intermediate bevel gear It consists of an intermediate shaft 32 into which a gear 31 is loosely fitted, and both upper and lower ends of the intermediate shaft 32 are pivotally supported by a bracket case 4. The intermediate shaft 32 is formed with a bearing portion 33 that pivotally supports the tip portion 15a of the output shaft 15 of the drive section 11. It has been inserted. Further, a groove 35 is formed in the intermediate shaft 32 , and an E ring 34 for holding the intermediate bevel gear 31 is attached to this groove 35 .

[Procedural amendment 4]

[Name of document to be amended] Specification

[Correction target item name] 0027

[Correction method] Change

[Correction details]

When the drive motor 12 of the drive section 11 of the drive device 5 is driven, this output is output to the output shaft 15 via the reduction gear mechanism 13, and the drive bevel gear 17 is rotationally driven. Further, this output is transmitted to the intermediate bevel gear 31 of the intermediate shaft 32, and the clutch gear 23 of the driven portion 25 is rotationally driven via the spur gear portion 17b of the intermediate bevel gear 31, and the clutch holder 21 is engaged by the clutch mechanism 22. The support shaft 6 and the stay 1 are rotated through the mirror body to move the mirror body. In this case, the ball 26 of the locking means 80 comes off from the inclined recess 26a .

[Procedural amendment 5]

[Name of document to be amended] Specification

[Correction target item name] 0029

[Correction method] Change

[Correction details]

As described above, according to this embodiment, the drive section 11 of the drive device 5 is disposed laterally, the drive bevel gear 17 is fitted to the output shaft 15 of the drive section 11, and the drive section 11 of the drive device 5 is disposed in the horizontal direction. An intermediate bevel gear 31 that meshes with the drive bevel gear 17 and the clutch gear 23 of the driven part 25 at the same time, and an intermediate shaft 32 that the intermediate bevel gear 31 loosely fits are provided between the part 11 and the driven part 25. By forming the bearing portion 33 that pivotally supports the output shaft 15 on the intermediate shaft 32, the height h of the bracket case 4 is reduced, the degree of freedom in design for mounting on the vehicle body is increased, and the space of the bracket case 4 is reduced. Furthermore, it is possible to have design latitude regarding the dimensions and arrangement of the component parts, and furthermore, the installation can be simplified.

[Brief explanation of drawings]

FIG. 1 is a sectional view showing the internal structure of an electric stay retractable mirror according to an embodiment of the present invention.

FIG. 2 is a plan view showing the internal structure of an electric stay retractable mirror according to an embodiment of the present invention.

FIG. 3 is an external side view of the electric stay retractable mirror.

FIG. 4 is a sectional view showing the internal structure of a conventional electric stay retractable mirror.

FIG. 5 is a sectional view showing the internal structure of a conventional electric stay retractable mirror.

[Explanation of symbols]

1 stay 4 Bracket case 5 Drive device 6 Support shaft 11 Drive section 15 Output shaft 17 Drive bevel gear 20 Driven gear mechanism 21 Clutch holder 22 Clutch mechanism 23 Clutch gear 25 Driven part 31 Intermediate bevel gear (intermediate bevel gear mechanism) 32 Intermediate shaft (intermediate bevel gear mechanism) 33 Bearing part (intermediate bevel gear mechanism)

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[Procedural amendment]

[Submission date] September 30, 1991

[Procedural amendment 6]

[Name of document to be amended] Specification

[Name of item to be corrected] Brief explanation of the drawing

[Correction method] Change

[Correction details]

[Brief explanation of drawings]

FIG. 1 is a sectional view showing the internal structure of an electric stay retractable mirror according to an embodiment of the present invention.

FIG. 2 is a plan view showing the internal structure of an electric stay retractable mirror according to an embodiment of the present invention.

FIG. 3 is a sectional view taken along line AA in FIG. 1;

FIG. 4 is an external side view of the electric stay retractable mirror.

FIG. 5 is a sectional view showing the internal structure of a conventional electric stay retractable mirror.

FIG. 6 is a sectional view showing the internal structure of a conventional electric stay retractable mirror.

[Explanation of symbols] 1 stay 4 Bracket case 5 Drive device 6 Support shaft 11 Drive section 15 Output shaft 17 Drive bevel gear 20 Driven gear mechanism 21 Clutch holder 22 Clutch mechanism 23 Clutch gear 25 Driven part 31 Intermediate bevel gear (intermediate bevel gear mechanism) 32 Intermediate shaft (intermediate bevel gear mechanism) 33 Bearing part (intermediate bevel gear mechanism)

[Procedural amendment 7]

[Name of document to be corrected] Drawing

[Correction target item name] Full map

[Correction method] Change

[Correction details]

[Figure 1]

[Figure 2]

[Figure 3]

[Figure 4]

[Figure 5]

[Figure 6]

Claims (1)

[Scope of utility model registration request] Claim 1: An electric stay retractable type in which the base end of the stay that supports the mirror body at the tip is attached to a support shaft rotatably held within a bracket case, and the support shaft is rotated by a drive device. In the mirror, the drive section of the drive device is disposed laterally, the drive bevel gear is fitted to the output shaft of the drive section, and the drive bevel gear and the driven section are disposed between the drive section and the driven section of the drive device. An electric stay retractable mirror characterized by having an intermediate bevel gear mechanism that meshes with a clutch gear at the same time.