JPH0523875Y2 - - Google Patents

Description

[Detailed Description of the Invention] a. Industrial Application Field The present invention relates to the structure of a long laminated rack used in a gear mechanism.

b. Prior Art In gear mechanisms, conventionally, as a rack for guiding linear motion from rotational motion of gears, there has been a flat plate, a vertical square bar, or a round bar with teeth of the same shape carved at equal intervals on one side. The gear cut was created using a gear cutter on a machine tool.

c Problems that the invention aims to solve However, creating a rack by machining the flat plate, square bar, or round bar requires a long processing time and is therefore economically expensive. Furthermore, the various dimensions of the racks, especially those with long lengths, had to be processed separately, resulting in the problem of a lack of flexibility in responding to demand.

The present invention was devised in view of the above-mentioned problems, and its purpose is to provide a laminated rack that solves the above-mentioned problems, can be readily adapted to the assembly of long racks of any required thickness, and is economically inexpensive. It's about doing.

d. Means for Solving the Problems The structure of the present invention to achieve the above object is as follows.

(1) The same tooth pitch and tooth profile are formed on a straight line, each has a length that is an integral multiple of the tooth pitch, and a plurality of assembly holes are drilled at symmetrical positions when viewed in the horizontal direction. one thin plate, and a plurality of assembly holes formed with the tooth profile, each having a length that is an integral multiple of the first thin plate, and equally spaced from the distance between at least one pair of holes in the first thin plate. The first and second thin plates are alternately laminated to a predetermined thickness so that their end faces are aligned at both ends, and the intermediate In the section, one or more of the second thin plates are disposed at both ends in the horizontal direction so as to be connected to each other in order to obtain the required length, and the thin plates are laminated to the above thickness, and then the second thin plates are laminated to the above assembly hole. The present invention is characterized in that it is a laminated rack assembled by the assembly members via the above-mentioned assembly members.

(2) In the laminated rack of the above (1), one or more of the first thin plate and the second thin plate are made of a different material.

(3) The laminated rack according to (1) above, wherein the length of the side of the second thin plate on which the teeth are formed is slightly shorter than an integral multiple of the length of the first thin plate.

e. Embodiments Hereinafter, preferred embodiments of the present invention will be described in detail based on the drawings.

FIG. 1 shows the basic form of a laminated rack. This laminated rack 1 is made by laminating several laminated thin plates 2 in the thickness direction, each of which has teeth that mesh with a regular spur gear and are formed in the same shape at equal intervals on one straight side in the longitudinal direction of an elongated rectangular thin plate. They are assembled to a required thickness and caulked with assembly studs 3 that pass through holes 2a (not shown) provided in each of the laminated thin plates 2.
This laminated thin plate 2 may be, for example, a pressed metal thin plate.

Now, the laminated thin plate 4 shown in FIG. It is located at the bottom of the third mountain.

By using this laminated thin plate (short) 4 and the laminated thin plate (long) 2 whose side length is relatively long as shown in FIG. A method for manufacturing the 3-inch laminated rack 5 will be explained with reference to FIG.

FIG. 4 shows the laminated thin plate (short) 4 and the laminated thin plate (long) 2 as shown in FIG. A method of manufacturing a long laminated rack 5 by laminating the thin plates 2 in which assembly holes 2a (positions of studs 3) are provided at the bottom of every even number of peaks when viewed in the horizontal direction is shown.

In the figure, at the left end of the figure, which is the starting end of the long laminated rack 5, the laminated thin plates (short) 4 and (long) 2 are laminated alternately with tooth tips 5a or tooth profiles aligned so that their end surfaces are aligned. and laminate them to a predetermined thickness. Next, in the middle part of the figure, a predetermined number of laminated thin plates (long) 2 are successively arranged on the right side of the left end according to the required dimensions, and they are mutually arranged in the laminating direction. The continuous laminated thin plate (long)
The laminated thin plates (long) 2 are sequentially laminated so as to span the two sheets of 2. In this way, the laminated thin plates (long) 2 are arranged in a zigzag pattern with respect to each other. At the right end of the long laminated rack 5, which is the end of the long laminated rack 5, the laminated thin plates (long) 2 and (short) 4 are attached to the tooth tip 5 so that their end surfaces are aligned.
a or stack them alternately while matching the tooth profile. In this case, the laminated thin plates (long) 2 and (short) 4 are alternately arranged so that the stacking order at the starting end is exactly reversed, as shown in the figure. After that, each laminated thin plate (long) 2, (short) 4 passes through the hole formed therein and is assembled by caulking with an assembly stud 3.

The above is an example of manufacturing a long laminated rack 5, in which the length of the laminated thin plate (short) 4 is set to an appropriate integral multiple of the tooth pitch, and the length of the laminated thin plate (long) 2 is set to the thin laminated plate (short). If the length is an appropriate integer multiple of 4, a laminated rack of any length can be obtained. In this case, in order to match the hole positions for assembling both thin plates (long) 2 and (short) 4, it is desirable that the laminated thin plate (short) 4 has a plurality of holes, and from a structural point of view, the positions are symmetrical in the horizontal direction. In terms of assembly, it is preferable that a plurality of holes in the laminated thin plate (long) 2 are continuously drilled at intervals equal to the spacing between at least two holes in the short thin plate 4.

Next, the length of the laminated thin plate (long) is slightly shorter than an integral multiple of the length of the laminated thin plate (short), and is used for the intermediate portion of the long laminated rack,
Adjacent laminated thin plates are alternately stacked to the left and right in the longitudinal direction,
By moving the inner diameter of the hole provided in the thin plate and the outer diameter of the assembly stud by a minute difference and assembling it, the tooth thickness formed by the teeth of the laminated rack increases by a minute difference, so that it can mesh with the spur gear. It is possible to reduce the backlash between the two when driving.

Furthermore, when at least one layer of the laminated thin plate (long) and the laminated thin plate (short) is made of a material different from that of the other layers (e.g., made of metal), such as plastic, the laminated rack is engaged with a spur gear and operates as follows:
Similarly, a laminated rack in which at least one layer is formed with teeth having a slightly increased addendum coefficient different from that of the other layers has a substantially increased tooth thickness, so that when the rack is engaged with a spur gear and operated, the collision between the two can be reduced.

Next, FIG. 5 shows an embodiment in which the long laminated rack described above is linearly driven by a motor. In the figure, two parallel guide rods 12, which are slidably penetrated through, for example, an oil-impregnated bearing, are held together at both ends through two holes 11a that are drilled in parallel through a metal base 11, for example. A holding member 13 is provided, and both holding members 13,
13 and both the guide rods 12, 12.
A long laminated rack 10 is disposed between the guide rods 12 parallel to the guide rods 12 and under tension at both ends. The two guide rods 12 passing through the base 11 are threaded at their tips and inserted into through holes 13a provided in the holding member 13. At both ends of the laminated rack 10, there are a semicircular toothed member 15 with a flange as shown in FIG. 6 that meshes with the teeth formed on the rack 10, and a semicircular support member 16 with a flange as shown in FIG. It is inserted and fitted into the rack holes 13b of the holding members 13, 13. To apply tension to the laminated rack 10, turn the nut 14a engaged with the threaded portions at the tips of the two guide rods 12, 12 to apply an average tension to the holding members 13, 13 in opposite directions. By applying tension, tension can be applied to the laminated rack 10 by the semicircular toothed member 15 and the semicircular support member 16 fitted to the holding member 13. Thereafter, the guide rod 12 and the holding member 13 are fixed with the nut 14b. Motor 1 on base 11
A pinion 18 fixed to the motor shaft is arranged so as to mesh with the teeth of the laminated rack 10. Furthermore, even though the elongated laminated rack 10 with both ends fixed is under tension, the central portion is bent due to its own weight and load. Roller or ball bearing 1
9 (single ball bearing in the figure) is arranged, and the laminated rack 10 is pressed toward the pinion 18 side by two springs 21 attached via a spring support member 20 attached to a shaft fitted to the inner ring. Then, the laminated rack 10 and pinion 18 are made to mesh sufficiently. In this way, the rotational motion of the motor 17 can be converted into the linear motion of the laminated rack 10 without any problem. Therefore, if a controlled object is connected to this laminated rack 10, the controlled object can be driven linearly by the motor 17.

It goes without saying that the technique of the present invention is not limited to the technique in the embodiments described above, and may be applied to means of other modes that perform the same function.

f. Effect of the invention As is clear from the above explanation, according to the laminated rack of the invention, the same tooth pitch and the same tooth profile are formed on a straight line, and each has a length that is an integral multiple of the tooth pitch, and its horizontal length. a first thin plate having a plurality of assembly holes drilled at symmetrical positions when viewed in the direction;
The tooth profile is formed, and a plurality of assembly holes are continuously drilled with a length that is an integral multiple of the first thin plate and at equal intervals to the distance between at least one pair of holes in the first thin plate. It consists of a second thin plate and an assembly member, and at both ends, the first,
While alternately laminating the second thin plates to a predetermined thickness,
In the intermediate part, one or more of the second thin plates are disposed at both ends in the horizontal direction so as to be connected to each other in order to have the required length, and the second thin plates are laminated to the thickness as described above. Since the rack is assembled using the assembly members through the assembly holes, it is possible to quickly assemble a long rack having any required thickness and length, and it can be provided economically and inexpensively.

Then, in advance, the length of the laminated thin plate (short) is an appropriate integer multiple of the pitch of the teeth, and the length of the laminated thin plate (long) is an appropriate integral multiple of the thin plate (short). By preparing, the required 1
Quickly manufacture long laminated racks with different tooth pitches.
It can be produced inexpensively and in large quantities.

[Brief explanation of drawings]

Figure 1 is an external view showing the basic shape of the laminated rack, and Figure 2 is an integral number multiple of the tooth pitch (3 times the length in the figure).
Fig. 3 is an external view showing a laminated rack according to an embodiment of the present invention, and Fig. 4 is an explanatory diagram showing a method of laminating laminated thin plates to produce a long laminated rack. , Fig. 5 is a front view of another embodiment of linear drive by a motor using the laminated rack according to the present invention, Fig. 6 is an external view of a semicircular toothed member, and Fig. 7 is a diagram of a semicircular support member. It is an external view. 1... Laminated rack, 2... Laminated thin plate (long), 3
...Assembling studs, 4...Laminated thin plate (short), 5,10
...Long laminated rack, 11...Base, 12...
...Guide rod, 13...Holding member, 14a, 1
4b... Nut, 15... Semicircular toothed member, 16
...Semicircular support member, 17...Motor, 18...
Pinion, 19...Roller or ball bearing, 20...
Spring support member, 21... spring.

Claims (1)

[Utility Model Claims] (1) A first thin plate having the same tooth pitch and tooth profile formed on a straight line, each having a length that is an integer multiple of the tooth pitch, and having a plurality of assembly holes drilled at symmetrical positions in the horizontal direction, a second thin plate having the tooth profile formed thereon, a length that is an integer multiple of the first thin plate, and having a plurality of assembly holes drilled continuously at equal intervals with the intervals of at least a pair of holes in the first thin plate, and an assembly member, wherein the first and second thin plates are alternately laminated to a predetermined thickness at both ends so that their end faces are aligned, and in the intermediate portion, one or more second thin plates are arranged at both ends in the horizontal direction so as to be connected to each other to obtain the required length,
and assembled by the assembly member through the assembly hole.(2) A laminated rack according to claim (1) in which one or more of the first thin plate and the second thin plate are made of different materials.(3) A laminated rack according to claim (1) in which the length of the side on which the teeth of the second thin plate are formed is slightly shorter than an integral multiple of the length of the first thin plate.