JP6458701B2 - Gear support device - Google Patents

Description

  The present invention relates to a gear support device for properly engaging a gear on a reference gantry side with a rack gear on another gantry side or another gear.

  Patent Document 1 discloses a technique related to an electric slide device including a rack and pinion mechanism. As shown in FIG. 14, the electric slide device described in Patent Document 1 is provided on a rack gear 102 provided on a platform (not shown) and a reference frame (not shown) that supports the platform so as to be horizontally slidable. The motor 103 and the pinion gear 104 are provided. The rack gear 102 is fixed to the side surface of the platform so as to extend in the sliding direction. The motor 103 is fixed at a predetermined position of the reference frame, and a pinion gear 104 is attached to the drive shaft of the motor 103. The pinion gear 104 meshes with the rack gear 102 as shown in FIG. Thus, when the motor is driven, the platform slides horizontally with respect to the reference frame by the meshing action of the rack gear 102 and the pinion gear 104.

International Publication WO2011 / 036984A1

  When the rack gear 102 and the pinion gear 104 are engaged with each other in the electric slide device, it is difficult to manage backlash, which is a gap in the movement direction between the rack gear 102 and the pinion gear 104, to an appropriate value. Currently, a thin shim is assembled between the rack gear 102 and the pinion gear 104, and then the shim is removed. However, when the pinion gear 104 is installed in a narrow place, it is difficult to use the shim.

  The present invention has been made to solve the above problems, and an object of the present invention is to facilitate adjustment of backlash between a gear and a rack gear (another gear).

The above-described problems are solved by the inventions of the claims. The invention according to claim 1 includes at least one gear, and is fixed at a predetermined position of the reference frame so that the gear can be engaged with a rack gear provided on another frame or another gear. A fixed base fixed to the reference frame, a position adjusting base connected to the fixed base in a rotatable state, and a position adjusting base. Provided on the position adjusting base at a position away from the center of rotation, and between the first gear constituting the at least one gear, the first gear and the rack gear, or another gear A position adjusting mechanism capable of adjusting a rotation angle of the position adjusting base with respect to the fixed base so that the first gear can be displaced with respect to the fixed base by an appropriate value of backlash; .

  According to the present invention, the position adjustment mechanism of the gear support device is a position adjustment base for the fixed base so that the gear can be displaced relative to the fixed base by an appropriate amount of backlash between the gear and the rack gear (another gear). Can be adjusted. For this reason, for example, after fixing the fixed base to the reference frame with zero backlash between the gear and the rack gear (another gear), the position adjustment mechanism adjusts the rotation angle of the position adjustment base relative to the fixed base. The backlash can be set to an appropriate value. That is, after fixing the fixed base of the gear support device to the reference frame, the position adjustment base is rotated with respect to the fixed base by the position adjustment mechanism, and the backlash between the gear and the rack gear (another gear) is set to an appropriate value. This makes it easy to adjust the backlash.

  According to the invention of claim 2, the position adjusting mechanism is provided on the other of the first bolt hole formed in one of the fixed base and the position adjusting base, and the fixed base and the position adjusting base. A second bolt hole having a diameter larger than that of the first bolt hole, and a bolt having a diameter substantially the same as that of the first bolt hole and passed through the first bolt hole and the second bolt hole. And the position adjustment base rotates relative to the fixed base by a difference in diameter between the bolt and the second bolt hole, so that the first gear backlashes with respect to the fixed base. It is displaced by the appropriate value. That is, since the position adjusting base is rotated with respect to the fixed base by the difference in diameter between the bolt and the second bolt hole, the structure of the position adjusting mechanism is simplified.

According to the invention of claim 3, the second gear constituting the at least one gear is provided at the position of the rotation center of the position adjusting base, and the backlash between the first gear and the rack gear is zero. At this time, the positional relationship between the first gear and the second gear is set so that the backlash between the second gear and the rack gear becomes an appropriate value. For this reason, even when the gear support device has a plurality of gears (first and second gears), the backlash between each gear and the rack gear can be set to an appropriate value.

  According to the invention of claim 4, the fixed base is temporarily fixed in a state in which the fixed base can be rotated in the vertical direction with respect to the reference frame, and the first gear meshes with the rack gear or another gear, The fixed base is configured to be fixed to the reference frame. For this reason, it becomes easy to mesh the first gear and the rack gear (another gear).

  According to the invention of claim 5, the fixed base is provided with a handle portion that can be gripped when the fixed base is rotated up and down within a certain range with respect to the reference frame. For this reason, the fixed base can be easily turned up and down with respect to the reference frame.

  According to the present invention, it is easy to adjust the backlash between the gear and the rack gear (another gear).

It is a whole perspective view showing the wheelchair lifter of a passenger car using an electric slide device provided with the gear support device concerning Embodiment 1 of the present invention. It is the side view which looked at the operation of the wheelchair lifter from the vehicle left side. It is the side view (III-III arrow line view of FIG. 4) which looked at the gear support apparatus which concerns on the said electric slide apparatus and this embodiment which comprises the electric slide apparatus from the vehicle left side (vehicle width direction outer side). It is a disassembled perspective view of the said gear support apparatus. It is the side view which looked at the said gear support apparatus from the vehicle right side (vehicle width direction inner side). It is the side view which looked at the fixed base of the said gearwheel support apparatus, the base for position adjustment, etc. from the vehicle right side (vehicle width direction inner side). It is the side view which looked at the fixed base of the said gear support apparatus from the vehicle right side (vehicle width direction inner side). It is a longitudinal cross-sectional view (VIII-VIII arrow directional cross-sectional view of FIG. 6) of the said gear support apparatus. It is a longitudinal cross-sectional view (IX-IX arrow directional cross-sectional view of FIG. 6) of the said gear support apparatus. It is the side view (X arrow enlarged view of FIG. 6) which looked at the position adjustment mechanism of the said gear support apparatus from the vehicle right side (vehicle width direction inner side). It is a side view showing the state which the pinion gear for motors and the rack gear meshed with zero backlash. It is the side view which looked at the operation | movement of the position adjustment mechanism of the said gear support apparatus from the vehicle right side (vehicle width direction inner side). It is a side view showing the state which the pinion gear for motors and the rack gear meshed with the appropriate backlash. It is a side view showing the meshing state of the conventional rack gear and pinion gear.

[Embodiment 1]
Hereinafter, a gear support device according to Embodiment 1 of the present invention will be described with reference to FIGS. 1 to 13. The gear support device according to the present embodiment is a device used in the electric slide device 20 of the wheelchair lifter 10 installed in the welfare vehicle C. Here, front, rear, left and right and up and down in the figure correspond to front, back, left and right and up and down of the welfare vehicle C including the wheelchair lifter 10.

<About wheelchair lifter 10 outline>
Before describing the gear support device according to the present embodiment, an outline of the wheelchair lifter 10 will be briefly described. The wheelchair lifter 10 is a device for getting a passenger in and out of the rear opening H of the welfare vehicle C (hereinafter referred to as the vehicle C) with the wheelchair K. As shown in FIG. 1, the wheelchair lifter 10 includes a horizontal platform 12 on which the wheelchair K is placed, a pair of left and right lifting link mechanisms 14 that lift and lower the platform 12 in a horizontal state, and the platform 12 as a lifting link mechanism 14. The electric slide device 20 is configured to slide back and forth.

  As shown in FIGS. 1 and 2, the elevating link mechanism 14 is connected to both rear ends (left and right) of the passenger compartment floor FL by left and right fixing brackets 141. The elevating link mechanism 14 includes a pair of left and right four-bar linkage mechanisms 143, a pair of left and right elevating arms 144, and a pair of left and right holders 148. Then, the base end portions of the left and right four-bar linkage mechanisms 143 are connected to the left and right fixing brackets 141 so as to be vertically rotatable. The left and right lifting arms 144 are connected to the distal ends of the left and right four-bar linkage mechanisms 143 so as to be relatively rotatable in the vertical direction.

  Left and right holders 148 that support the platform 12 in a state in which the platform 12 can slide back and forth are provided at the lower ends of the left and right lifting arms 144. The holder 148 and the platform 12 are provided with an electric slide device 20 for sliding the platform 12 back and forth with respect to the holder 148. With the above configuration, when the left and right four-bar linkage mechanism 143 is rotated upward from the boarding / alighting position shown in FIG. 1 to a predetermined position, the platform 12 is raised to a height position equal to the passenger compartment floor FL. Next, the electric slide device 20 slides the platform 12 forward with respect to the holder 148, whereby the platform 12 is stored in the vehicle interior of the vehicle C as shown in FIG.

<About the electric slide device 20>
The electric slide device 20 is a slide device using a rack and pinion meshing structure. The electric slide device 20 includes a motor 23, a speed reducer 23 g (hereinafter referred to as “motor 23”), and a brake 25 provided in the left holder 148, as shown in a side view as viewed from the left side of the vehicle in FIG. 3. Yes. 4 and 5, the motor pinion gear 23p attached to the output shaft 231 of the motor 23 (decelerator 23g) and the brake pinion gear 25p attached to the output shaft 251 of the brake 25 are used as a platform. 12 is meshed with a rack gear 22 provided downward on the left side surface. Here, FIG. 5 is a schematic view taken along the arrow VV in FIG. 4, and shows the electric slide device 20 from the opposite side (vehicle right side (vehicle width direction inner side)) with respect to FIG. 3.

  With the above configuration, when the motor 23 is driven with the brake 25 released, the platform 12 slides due to the meshing action of the motor pinion gear 23p and the rack gear 22. At this time, the brake pinion gear 25p idles as the rack gear 22 slides. In addition, when the brake 25 is operated while the motor 23 is stopped, the platform 12 is held at the stop position by the meshing action of the brake pinion gear 25p and the rack gear 22.

  The brake 25 is attached to a frame 148k of a holder 148 via a fixed base 34 of a gear support device 30 (described later). Further, the motor 23 is fixed to a position adjusting base 32 of the gear support device 30, and the position adjusting base 32 is attached to a frame 148 k of the holder 148 via a fixed base 34. That is, the frame 148k of the holder 148 corresponds to the reference frame of the present invention. Further, the platform 12 including the rack gear 22 corresponds to another gantry of the present invention.

<About the gear support device 30>
When the gear support device 30 meshes the motor pinion gear 23p and the brake pinion gear 25p on the holder 148 side with the rack gear 22 on the platform 12 side, the backlash of the backlash which is a clearance in the movement direction between the two 23p (25p) and 22 is provided. It is a device that can be adjusted easily. The gear support device 30 includes a position adjustment base 32 to which the motor 23 is attached, and a fixed base 34 to which the position adjustment base 32 is rotatably supported and the brake 25 is attached.

<About fixed base 34>
The fixed base 34 of the gear support device 30 is formed in a substantially inverted T-shape from the base main body 340 and the handle 348 as shown in the side views of the vehicle right side (vehicle width direction inner side) in FIGS. 4 and 7. It is the formed plate-like base. The fixed base 34 is arranged so that the base main body 340 extends in the vehicle front-rear direction with the handle 348 standing upright. As shown in FIG. 7, a bearing hole 341 is formed in the base main body 340 of the fixed base 34 below the handle portion 348. Here, as shown in FIG. 4, a bearing hole 321 having the same diameter as the bearing hole 341 of the fixed base 34 is also formed in the position adjusting base 32 described later. As shown in FIGS. 6 and 8 (vertical cross-sectional view taken along arrow VIII-VIII in FIG. 6), the position adjusting base 32 has a position of the bearing hole 321 that matches the position of the bearing hole 341 of the fixed base 34. As shown in the figure, it is superimposed on the right side surface (the surface side in FIG. 7) of the fixed base 34.

  As shown in FIG. 8, a brake bearing portion 25j that rotatably supports the output shaft 251 of the brake 25 is fitted into the bearing hole 341 of the fixed base 34 and the bearing hole 321 of the position adjusting base 32. . As shown in FIGS. 3, 4, etc., the brake 25 is attached to the left side of the base body 340 of the fixed base 34 (the back side in FIGS. 6, 7 (outer side in the vehicle width direction)) with screws or the like. ing. As shown in FIG. 8, the output shaft 251 of the brake 25 is passed through a brake bearing portion 25 j provided in bearing holes 341 and 321 between the fixed base 34 and the position adjusting base 32. The output shaft 251 of the brake 25 protrudes in the right direction with respect to the fixed base 34 and the position adjusting base 32, and a brake pinion gear 25p is attached to the right end portion of the output shaft 251. As a result, the position adjusting base 32 can rotate with respect to the fixed base 34 around the output shaft 251 of the brake 25 and the brake bearing portion 25j.

  As shown in FIGS. 6 and 7, a front bolt hole 342 for attaching the fixed base 34 to the mount 148 k of the holder 148 is formed at the front end portion of the fixed base 34 (base body 340). A rear bolt long hole 343 for attaching the fixed base 34 to the mount 148k of the holder 148 is formed at the rear end of the fixed base 34. The rear bolt elongated hole 343 has a length dimension so that the fixed base 34 can be rotated up and down within a certain range around a bolt (not shown) passed through the front bolt hole 342. Further, an upper bolt hole 349 for attaching the fixed base 34 to the mount 148k of the holder 148 is formed in the upper center of the handle portion 348 of the fixed base 34.

  As shown in FIG. 7, the output shaft 231 of the motor 23 and the motor bearing portion 23j attached to the position adjusting base 32 are passed through the position behind the fixed base 34 (base body portion 340). An escape hole 345 is formed. As shown in FIG. 9 (IX-IX cross-sectional view of FIG. 6), the escape hole 345 has an output shaft 231 of the motor 23 and the like so as not to prevent rotation of the position adjusting base 32 with respect to the fixed base 34 within a predetermined range. Is set to a sufficiently large diameter.

<About the position adjustment base 32>
As shown in FIG. 6 and the like, the position adjusting base 32 of the gear support device 30 is a plate-like base formed in a substantially flat L shape by a base main body portion 320 and a rear upper overhanging portion 328. As described above, the position adjusting base 32 is configured to overlap the fixed base 34 from the right side, that is, from the inner side in the vehicle width direction (see FIGS. 8 and 9). As shown in FIG. 6, the base body 320 of the position adjusting base 32 is formed with a bearing hole 321 into which the brake bearing 25j described above is fitted. The base body 320 of the position adjusting base 32 is formed with a bearing hole 325 into which the motor bearing 23j (see FIGS. 4 and 9) is fitted below the rear upper overhanging portion 328.

  On the left side (the back side in FIG. 6 and FIG. 7 (the outer side in the vehicle width direction)) of the rear upper overhanging portion 328 of the base 32 for position adjustment and the rear portion of the base main body 320, FIG. As shown, the motor 23 is mounted so as not to interfere with the fixed base 34. As shown in FIG. 9, the output shaft 231 of the motor 23 is passed through the motor bearing portion 23 j of the position adjusting base 32 (bearing hole 325) inside the escape hole 345 of the fixed base 34. The output shaft 231 of the motor 23 projects rightward with respect to the fixed base 34 and the position adjusting base 32, and a motor pinion gear 23p is attached to the right end of the output shaft 231. With the above configuration, the position adjustment base 32 corresponds to the difference in diameter between the escape hole 345 of the fixed base 34 and the motor bearing portion 23j of the position adjustment base 32 (bearing hole 325) with respect to the fixed base 34. It becomes possible to rotate around the output shaft 251 of the brake 25 by an angle.

<About the position adjustment mechanism 40>
Between the position adjustment base 32 and the fixed base 34, a position adjustment mechanism 40 for adjusting the rotation angle of the position adjustment base 32 with respect to the fixed base 34 is provided as shown in FIG. The position adjusting mechanism 40 rotates the position adjusting base 32 with respect to the fixed base 34 so that the motor pinion gear 23p can be displaced with respect to the fixed base 34 by an appropriate amount of backlash between the motor pinion gear 23p and the rack gear 22. It is a mechanism for adjusting the angle. The position adjustment mechanism 40 includes a first bolt hole 41 formed in the fixed base 34 as shown in FIG. 7 and the like, and a second bolt hole 42 formed in the position adjustment base 32 as shown in FIG. The insertion bolt 43 is inserted into the first and second bolt holes 41 and 42 (see FIG. 4).

  As shown in FIGS. 7 and 10, the first bolt hole 41 is formed in a disk protrusion 340 t at the rear upper part of the fixed base 34 (base main body 340), and has a diameter dimension substantially equal to that of the insertion bolt 43. Is set. The second bolt hole 42 is formed at the corner of the rear upper overhanging portion 328 of the position adjusting base 32, and as shown in FIG. 10, the second bolt hole 42 is larger than the diameter of the insertion bolt 43 (first bolt hole 41). Bo is set to a large value.

  With the above-described configuration, the position adjustment base 32 is configured so that the output shaft of the brake 25 has an angle corresponding to a difference in diameter (dimension Bo) between the insertion bolt 43 of the position adjustment mechanism 40 and the second bolt hole 42 with respect to the fixed base 34. It can be rotated around 251. Here, the dimension Bo is set to a value smaller than the difference in diameter between the escape hole 345 of the fixed base 34 and the motor bearing portion 23j of the position adjustment base 32 (bearing hole 325). Further, the dimension Bo is such that when the position adjusting base 32 is rotated with respect to the fixed base 34 by an angle corresponding to the dimension Bo, the motor pinion gear 23p has an appropriate backlash value Bk ( (See FIG. 13).

<Others>
As will be described later, the position adjusting base 32 and the fixed base 34 are divided into three sets for connecting the positions 32 and 34 to each other after adjusting the position of the position adjusting base 32 with respect to the fixed base 34 by the position adjusting mechanism 40. Connection mechanisms 51, 52, and 53 are provided. The first connecting mechanism 51, the second connecting mechanism 52, and the third connecting mechanism 53 are disposed at an upper position of the brake pinion gear 25p with an interval, as shown in FIG. Further, as shown in FIGS. 4, 8, and 9, the protruding shaft of the brake pinion gear 25p and the protruding shaft of the motor pinion gear 23p are rotatably supported on the right side surface of the position adjusting base 32, respectively. A front support 55 and a rear support 56 are attached.

<About the function of the gear support device 30>
Next, the attachment procedure of the gear support device 30 to the mount 148k of the holder 148 and the operation of the gear support device 30 will be described. The brake 25 is attached to the fixed base 34 before the gear support device 30 is attached to the mount 148k of the holder 148. At this time, the output shaft 251 of the brake 25 is passed through the brake bearing portion 25j fitted in the bearing hole 341 of the fixed base 34 and the bearing hole 321 of the position adjusting base 32 as shown in FIG. The protruding shaft of the brake pinion gear 25p provided on the output shaft 251 of the brake 25 is supported by the front support 55, and the front support 55 is attached to the position adjustment base 32.

  A motor 23 is attached to the position adjustment base 32. At this time, the output shaft 231 of the motor 23 is passed through the motor bearing portion 23j of the position adjusting base 32 (bearing hole 325) inside the escape hole 345 of the fixed base 34 as shown in FIG. The protruding shaft of the motor pinion gear 23 p provided on the output shaft 231 of the motor 23 is supported by the rear support 56, and the rear support 56 is attached to the position adjustment base 32.

  Next, the insertion bolt 43 is inserted into the first bolt hole 41 of the fixed base 34 and the second bolt hole 42 of the position adjustment base 32 constituting the position adjustment mechanism 40. In this state, as shown in FIG. 10, the position adjusting base 32 is pulled upward with respect to the fixed base 34. As a result, the position adjustment base 32 rotates upward (right rotation in FIG. 6) about the output shaft 251 of the brake 25 with respect to the fixed base 34, and the insertion bolt 43 and the position adjustment base 32 A gap Bo is formed between the two bolt holes 42 above. In this state, a nut (not shown) is screwed into the insertion bolt 43, and the position adjustment base 32 is temporarily fixed to the fixed base 34. That is, the position adjustment base 32 is held at the upper limit position with respect to the fixed base 34.

  Next, the fixed base 34 is set with respect to the base 148k of the holder 148, and the front bolt hole 342 and the rear bolt long hole 343 of the fixed base 34 are temporarily fixed to the base 148k with bolts. That is, the fixed base 34 can be turned up and down by the length of the rear bolt long hole 343 around the bolt (not shown) passed through the front bolt hole 342 with respect to the mount 148k of the holder 148. Next, with the fixed base 34 in the lower limit position, the platform 12 is moved back and forth to a predetermined position, and the rack gear 22 is disposed above the brake pinion gear 25p and the motor pinion gear 23p.

  In this state, the fixed base 34 is pulled up using the handle portion 348, so that the fixed base 34 is rotated upward around a bolt (not shown) in the front bolt hole 342, and the motor pinion gear 23p, The brake pinion gear 25 p meshes with the rack gear 22. At this time, as shown in FIG. 11, the motor pinion gear 23p and the rack gear 22 are meshed with each other with zero backlash. Here, the brake pinion gear 25p is connected to the motor pinion gear 23p so that the backlash between the brake pinion gear 25p and the rack gear 22 becomes an appropriate value when the motor pinion gear 23p meshes with the rack gear 22 with zero backlash. It is positioned with respect to it.

  In this state, the fixed base 34 is formally fixed to the frame 148k of the holder 148. That is, the fixed base 34 is bolted to the frame 148k of the holder 148 with an appropriate torque at the position of the front bolt hole 342 and the rear bolt elongated hole 343, and the fixed base 34 It is bolted to the gantry 148k.

  Next, the screwing between the insertion bolt 43 and the nut of the position adjusting mechanism 40 is loosened, and the temporary fixing of the position adjusting base 32 to the fixing base 34 is released. In this state, as shown in FIG. 12, the position adjusting base 32 is pulled downward with respect to the fixed base 34. As a result, the position adjustment base 32 rotates downward (left rotation in FIG. 6) about the output shaft 251 of the brake 25 with respect to the fixed base 34, and the position adjustment base 32 and the insertion bolt 43 of the fixed base 34 are adjusted. A gap Bo is formed between the second bolt holes 42 of the base 32 below. That is, the position adjusting base 32 is held at the lower limit position with respect to the fixed base 34. As a result, the motor pinion gear 23p provided on the position adjustment base 32 is lowered by the dimension Bk with respect to the fixed base 34, and the backlash between the motor pinion gear 23p and the rack gear 22 is proper as shown in FIG. It is held at the value Bk.

  Next, in this state, the insertion bolt 43 and the nut of the position adjusting mechanism 40 are tightened with an appropriate torque, and the position adjusting base 32 and the fixed base 34 are connected. Further, the position adjusting base 32 and the fixed base 34 are connected by the first connecting mechanism 51, the second connecting mechanism 52, and the third connecting mechanism 53. Thereby, the attachment of the gear support device 30 to the gantry 148k of the holder 148 is completed. That is, the motor pinion gear 23p corresponds to the first gear of the present invention, and the brake pinion gear 25p corresponds to the second gear of the present invention.

<Advantages of Gear Support Device 30 according to this Embodiment>
According to the gear support device 30 according to the present embodiment, the position adjusting mechanism 40 is configured such that the motor pinion gear 23p is displaced with respect to the fixed base 34 by an appropriate value Bk of the backlash between the motor pinion gear 23p (gear) and the rack gear 22. The rotation angle of the position adjusting base 32 with respect to the fixed base 34 can be adjusted so that it can be performed. Therefore, for example, after the fixed base 34 is fixed to the frame 148k (reference frame) of the holder 148 with zero backlash between the motor pinion gear 23p and the rack gear 22, the position adjustment mechanism 40 adjusts the position of the fixed base 34. The backlash can be set to an appropriate value by adjusting the rotation angle of the base 32 for use. That is, after the fixed base 34 of the gear support device 30 is fixed to the frame 148k of the holder 148, the position adjusting base 32 is rotated with respect to the fixed base 34 by the position adjusting mechanism 40 so that the motor pinion gear 23p and the rack gear 22 are located. Since the backlash can be set to an appropriate value, the backlash can be easily adjusted.

  Further, since the position adjustment mechanism 40 is configured to rotate the position adjustment base 32 with respect to the fixed base 34 by the difference in diameter between the insertion bolt 43 and the second bolt hole 42, the position adjustment mechanism 40 has a configuration. It will be easy. Further, even when the gear support device 30 includes a plurality of gears (motor pinion gear 23p, brake pinion gear 25p), the backlash between each gear and the rack gear 22 can be set to an appropriate value. Further, the fixed base 34 is configured to be capable of rotating in the vertical direction within a certain range with respect to the gantry 148k (reference gantry) of the holder 148. Therefore, it becomes easy to mesh the motor pinion gear 23p and the rack gear 22, and the brake pinion gear 25p and the rack gear 22. Further, since the fixed base 34 is provided with the handle portion 348, the fixed base 34 can be easily rotated up and down with respect to the frame 148k (reference frame) of the holder 148.

<Example of change>
Here, the present invention is not limited to the above-described embodiment, and can be modified without departing from the gist of the present invention. For example, in this embodiment, the gear support apparatus 30 provided with the pinion gear 23p for motors and the pinion gear 25p for brakes was illustrated. However, the brake 25 and the brake pinion gear 25p are omitted, and the fixed base 34 and the position adjustment base 32 are connected in a relatively rotatable state using a connecting shaft instead of the output shaft 251 of the brake 25. But it is possible. Moreover, in this embodiment, the position adjustment mechanism 40 provided with the 1st bolt hole 41, the 2nd bolt hole 42, and the insertion bolt 43 was illustrated. However, for example, a position adjusting mechanism having a configuration in which the positioning pin is passed through the positioning hole while the position adjusting base 32 is shifted by the backlash with respect to the fixed base 34 is possible. Further, in the present embodiment, the gear support device 30 that adjusts the backlash between the motor pinion gear 23p (gear) and the rack gear 22 to an appropriate value is illustrated. However, with the gear support device of the present invention, it is also possible to adjust the backlash between the gears of the gear support device and the gears provided on another pedestal to an appropriate value. Furthermore, it is possible to provide two or more gears of the gear support device.

12 .... Platform (another stand)
22 ··· Rack gear 23p · Pinion gear for motor (first gear)
25p ... Pinion gear for brake (second gear)
25j ... Brake bearing 30 ... Gear support 32 ... Position adjustment base 34 ... Fixed base 348 ... Handle 40 ... Position adjustment mechanism 41 ...・ First bolt hole 42... Second bolt hole 43... Insertion bolt (bolt)
148 ... Holder 148k ・ ・ Mount (reference frame)

Claims (5)

A gear support device comprising at least one gear and configured to be meshed with a rack gear provided on another gantry or another gear by being fixed at a predetermined position of a reference gantry. Because
A fixed base fixed to the reference frame;
A position adjusting base connected in a rotatable manner to the fixed base;
A first gear that is provided on the position adjustment base at a position away from the rotation center of the position adjustment base, and constitutes the at least one gear;
The rotation of the position adjusting base relative to the fixed base is such that the first gear can be displaced relative to the fixed base by an appropriate value of backlash between the first gear and the rack gear or another gear. A position adjustment mechanism capable of adjusting the moving angle;
A gear support device having The gear support device according to claim 1,
The position adjusting mechanism is formed in one of the fixed bolt and the position adjusting base, the first bolt hole formed in one of the fixing base and the position adjusting base, and the other of the fixing base and the position adjusting base. A second bolt hole having a diameter larger than that of the first bolt hole, and a bolt having a diameter substantially equal to that of the first bolt hole and passed through the first bolt hole and the second bolt hole;
The position adjusting base rotates with respect to the fixed base by a difference in diameter between the bolt and the second bolt hole, so that the first gear has an appropriate backlash value relative to the fixed base. Displaceable gear support device. A gear support device according to claim 1 or 2, wherein
A second gear constituting the at least one gear is provided at a position of a rotation center of the position adjusting base;
When the backlash between the first gear and the rack gear is zero, the first gear and the second gear are set so that the backlash between the second gear and the rack gear becomes an appropriate value. The gear support device in which the positional relationship is set. The gear support device according to any one of claims 1 to 3,
The fixed base is temporarily fixed in a state where the fixed base is rotatable in a vertical direction with respect to the reference frame, and the fixed base is in a state where the first gear meshes with the rack gear or another gear. A gear support device configured to be fixed to the reference frame. The gear support device according to claim 4,
A gear support device in which the fixed base is provided with a handle portion that can be gripped when the fixed base is rotated up and down within a certain range with respect to a reference frame.

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