JPH0222743Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Field of Industrial Application) The present invention relates to a holding structure for a shaft that supports a character wheel of a vehicle totalizer.

(Prior art and its problems) The totalizer that displays the distance traveled by a vehicle is usually integrated with the speedometer in the meter case of the vehicle, and consists of a predetermined number of letter wheels numbered from 0 to 9 arranged in parallel. It is held in the frame by a shaft that passes through it. Regarding the holding structure of this totalizer, for example,
It is disclosed in Publication No. 54-8661. According to this, an annular groove is provided at the end of the shaft, a small diameter portion formed by the annular groove is engaged with a bearing hole formed in a step of a side wall (frame), and the step is formed to hold the shaft. A device in which a pressing member (collar) is engaged by caulking or elastic engagement has been disclosed.

(Problem to be Solved by the Invention) However, according to the configuration of the prior art, the shaft is held vertically between the side wall and the holding member, so even if the side wall is precisely aligned, the shaft will not fit inside the bearing hole. In some cases, the axis of the shaft may be misaligned, which not only causes the reading position of the totalizer supported on the shaft to be different, but also increases the number of parts and makes installation work troublesome. It was hot.

(Means for Solving the Problems) The present invention has been made to solve the problems of the prior art described above, and while a plurality of character wheels for totalization are pivotally supported approximately in the center, small diameter wheels are provided at both ends. A shaft having a pair of annular grooves each formed to form a section and a side surface are provided at a predetermined distance from each other, and one end is open and a small diameter portion of the shaft extends in a direction parallel to the side surface. a pair of bearing holes, each having a slit inserted along the shaft, communicating with the other end of the slit, and having a bearing hole into which both ends of the shaft excluding the annular grooves are press-fitted; The shaft is characterized by comprising a side wall and a collar that is press-fitted into the end of the shaft that protrudes from the outside of one of the side walls, thereby solving the problem of shaft axis misalignment and reducing the number of parts. ,
Moreover, it is an object of the present invention to provide a holding structure for a vehicle totalizer that is easy to install.

(Operation) The small diameter portions corresponding to the annular grooves formed at both ends of the shaft are inserted into the slits formed on both side walls, and then the shaft is moved in the axial direction, and both ends are press-fitted into both bearing holes, respectively. Once fitted, the collar is then pressed into the side wall from either end of the shaft.

(Embodiment of the invention) An embodiment of the invention will be described below in detail with reference to the accompanying drawings.

In Figs. 1 and 2, a speedometer body 1 is composed of an underbody 2 made of a metal member such as a zinc alloy member and a thick body 3 made of a synthetic resin member. A rotary shaft 4 to which a substantially bowl-shaped yoke 5 and a disc-shaped magnet 6 disposed concentrically within the yoke 5 are fixed is housed and supported, and at the base of the rotary shaft 4 on the yoke 5 side. A worm gear 4b is carved, and a thrust washer 7 is fitted to the lower part of the worm gear 4b. A thrust washer 8 is fitted into the other end of the rotary shaft 4, and a C clip 9 is fitted into an annular groove 4a carved in the other end to prevent it from coming off. The other end of the rotating shaft 4 engages with one end of a flexible wire (not shown) that transmits the rotation of the axle, and is rotated in accordance with the rotation of the axle. These rotating shaft 4, yoke 5, and magnet 6 constitute a drive unit.

A bearing (Atsupa metal) 19 integrally provided at approximately the center of the upper wall 3a of the Atsupa body 3 has a roughly bowl-shaped guide plate 12 fixed to one end (lower end), and a coiled spring 13 and an oil cup 14 at approximately the center.
The other end 11a of the pointer shaft 11 to which is fixed is fitted and supported by the shaft and projects upward, and a collar 16 is press-fitted into this projecting end 11a via a washer 15, whereby the pointer shaft 11 is attached to the upper wall of the attachment body 3. It is rotatably suspended from 3a. Atsupa body 3 upper wall 3a
A dial plate is screwed onto the bosses 3b and 3b' that protrude from the dial, and a pointer (both not shown) is fixed to the other end (upper end) 11a of the pointer shaft 11.

The free end 13a of the coiled spring 13 is attached to the Atsupa body 3.
is fixed to a locking arm 3c provided in the oil cup 1.
4 is loosely fitted on the outside of a cylinder 3d which is provided hanging below the bearing 19 of the upper wall 3a, and both of them form an oil damper. These pointer shafts 11,
Guide plate 12, coiled spring 13 and oil cup 14
A guideline unit is constructed.

The horizontal gear shaft 10 is connected to the upper surface 2 of the underbody 2
a bearing 2c provided at a predetermined location in the recess 2b' of b;
A gear 10a, which is rotatably supported at both ends by 2c' and carved on one end of the circumferential surface, meshes with the worm gear 4b.

One end of the vertical gear shaft 17 is connected to the underbody 2
The other end is in the bearing hole 2d of the upper wall 3 of the Atsupa body 3.
The gears 17a, which are respectively rotatably supported in bearing holes 3e drilled in the horizontal gear shaft 10a and carved on one end of the circumferential surface, mesh with the gears 10b carved on the other end of the circumferential surface of the horizontal gear shaft 10.

The bottom part 3f of the atsupa body 3 forms an annular seat surface, and is arranged to be joined to the top surface 2b of the underbody 2, and an elastic claw 3g protruding from a predetermined location on the joint end surface of the seat surface 3f faces the top surface 2b of the underbody 2. The upper body 3 and the underbody 2 are fitted into and fixed to the coupling hole 2e formed in the above manner.

In this coupled state, the peripheral wall of the guide plate 12 fixed to the pointer shaft 11 of the pointer unit creates an annular space (magnetic path) 18 formed between the yoke 5 and the magnet 6 fixed to the rotating shaft 4 of the drive unit. They are rotatably loosely fitted and magnetically coupled. This constitutes an inductive speedometer.

Separate and opposing side walls 3 of the Atsupa body 3
Approximately C-shaped bearing holes 3j, 3j' with one end open toward the rear are bored at predetermined locations h and 3h' in order to pivotally support the totalizer 20 (FIG. 2). Opening slits 3l, 3 of these bearing holes 3j, 3j'
The width of l' is set to be smaller than the inner diameter of the bearing holes 3j and 3j'. Also, these bearing holes 3j, 3
The inner diameter of j' is slightly smaller than the outer diameter of the shaft 23, which will be described later.

The totalizer 20 is composed of a plurality of character wheels 21, a driven gear 22 disposed at one end of these character wheels 21, and a shaft 23 that supports these rotatably but immovably in the axial direction. . The both side walls 3 are located near both ends of the shaft 23 of this totalizer 20.
An annular groove is formed at the same distance from h and 3h' and slightly wider than the wall thickness to form small diameter portions 24 and 25. The shaft diameter of each of these small diameter portions 24, 25 is equal to the slit 3l, 3 of each bearing hole 3j, 3j'.
Its diameter is slightly smaller than the width of l′.

Each small diameter portion 24, 25 of the shaft 23 is connected to the bearing hole 3.
j, 3j' through the slits 3l, 3l',
The totalizer 20 is integrally moved in the axial direction toward the driven gear 22 (direction A in the figure), brought into contact with the inner wall surface of one side wall 3h of the driven gear 22, and one end 23b of the shaft 23 is inserted into the bearing hole 3j. Press fit and the other end 23c
is press-fitted into the bearing hole 3j'. In this state, one end 23a of the shaft 23 projects outward from the bearing hole 3j', that is, the side wall 3h. Next, the collar 26 is press-fitted into the outwardly projecting end 23a of the side wall 3h of the shaft 23 and the small diameter portion 24 from the outside. By press-fitting this collar 26, the arrow of the shaft 23
Movement in the direction of side wall 3h' indicated by A' is prevented. The movement of the shaft 23 in the direction of arrow A is caused by the driven gear 2
2 is in contact with the inner wall of the side wall 3h. A driven gear 22 of this totalizer 20 meshes with a gear 17b carved on the other end of the circumferential surface of the vertical gear shaft 17.

As is well known, the above-mentioned totalizer 20 is connected to the rotating shaft 4.
As the vehicle rotates, it is driven via the horizontal gear shaft 10, vertical gear shaft 17, and driven gear 22 to display the distance traveled.

(Effects of the invention) As described above, according to the invention, a plurality of character wheels for totalization are pivotally supported approximately at the center, while a pair of annular grooves are formed at both ends to form small diameter portions. and a side surface thereof, each having a slit that is open at one end and through which a small diameter portion of the shaft is inserted along a direction parallel to the side surface. a pair of side walls each having a bearing hole that communicates with the other end of both slits and into which both ends of the shaft excluding the annular grooves are press-fitted; and from the outside of one of the side walls. Since the structure includes a collar that is press-fitted into the end of the protruding shaft,
The axial center of the shaft can be aligned with the center of the bearing hole, and the problem of shaft axial misalignment can be solved, and the positioning accuracy of the shaft can be improved. Furthermore, it is possible to prevent misalignment of the gears attached to rotate the shaft, and there is no risk of impairing the reading function of the totalizer. In addition, the number of parts can be reduced because a holding member as in the conventional case is not required, and the installation work can be easily performed by a series of so-called one-touch operations in which the shaft is inserted into the slit and then press-fitted into the bearing hole.

[Brief explanation of drawings]

Fig. 1 is an assembled perspective view of a vehicle speedometer and totalizer to which the present invention is applied, Fig. 2 is an assembled perspective view of the main parts of Fig. 1, and Fig. 3 is an assembled view in the direction of the arrow in Fig. 2. . 3j, 3j...bearing hole, 3h, 3h'...side wall,
3l, 3l'...slit, 20...totalizer, 21
...Character wheel, 23...Shaft, 24,25...
Shaft small diameter section, 26...color.

Claims (1)

[Scope of Claim for Utility Model Registration] A shaft having a pair of annular grooves formed at each end to form a small diameter portion while supporting a plurality of character wheels for counting approximately in the center; While the spaces are provided at predetermined intervals,
Each has a slit that is open at one end and through which the small diameter portion of the shaft is inserted in a direction parallel to the side surface, and communicates with the other end of both slits, and has a portion where both annular grooves are formed. a pair of side walls each having a bearing hole into which both ends of the shaft are press-fitted; and a collar which protrudes from the outside of one of the side walls and is press-fitted into the end of the shaft. Features a holding structure for vehicle totalizers.