JPH0439413A - Cloth roller bearing and its manufacture - Google Patents

Abstract

PURPOSE:To easily and effectively manufacture the above bearing and to facilitate its maintenance by providing a bisected race with an axially communicating through hole, and fitting a knock pin in the through hole unite the bisected races in a body. CONSTITUTION:Annular bodies A1, A2 is formed with a tapered face 11 to form a V-shaped raceway surface by assembling them, and piled up to coincide in their axial centers, and an axial pin hole 13 is drilled. A knock pin 4 is driven in the pin hole 13 to incorporate the annular bodies A1, A2, and drawn out after heat treatment such as quenching, tempering or the like for the individual grinding of the bodies A1, A2, which are incorporated using the knock pin 4 again for abrasive finishing. Thus, a cloth roller bearing can be easily and effectively produced and maintained.

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to a cross roller bearing and a method for manufacturing the same, and more specifically, whether one of the inner ring and the outer ring is
The present invention relates to a cross roller bearing that is bisected on a plane perpendicular to the axis, and a method for manufacturing the bisected bearing ring.

<Prior art> As is well known, a cross roller bearing has an inner ring 61 and an outer ring 6.
A plurality of rollers 64 are arranged between V-shaped tracks 63 formed on the opposing surface of the rollers 2 and 2.
(see figure).

In the above-mentioned cross roller bearing, either the inner ring 61 or the outer ring 62 is divided into two by a plane perpendicular to the axis, and an annular finished member R1 constituting the bearing ring.
, R2 are separated during transportation, etc., to prevent the cross roller bearing from being disassembled. In order to prevent the cross roller bearing from being disassembled due to separation during transportation, a rivet L is inserted into a through hole 65 parallel to the axis formed opposite to each other in each of the annular finishing members R1 and R2. By inserting a bolt B through it and caulking its tip (see, for example, Japanese Utility Model Application Publication No. 1716/1983), or by inserting a bolt B and screwing a nut N into its tip (see Fig. 4), the annular finished member is finished. R1 and R2 are being integrated.

<Problem to be solved by the invention> By the way, the through hole 65 formed in the annular finishing member R1
and the through hole 65 formed in the annular finishing member R2,
Misalignment occurs in the circumferential direction and the radial direction due to mutual processing errors and heat treatment distortion of the annular finished members R1 and R2.

Therefore, if the tip of the rivet L inserted into the through hole 65 is strongly caulked to integrate the annular finishing members R1 and R2 to the extent that they cannot move relative to each other, misalignment between the annular finishing members R1 and R2 will be prevented. This causes a problem in that the smooth rotation of the cross roller bearing is hindered. In this regard, a similar problem occurs when the bolt B is inserted into the through hole 65 and the nut N is strongly screwed into the tip of the bolt B.

Therefore, regarding the cross roller bearing using the above-mentioned rivet L, in order to absorb the misalignment of the through hole 65, a rivet L having a smaller diameter than the through hole 65 is used, and
When caulking the rivet L, both annular finishing members R1,
The amount of caulking of the rivet L is adjusted so that R2 is not completely integrated, that is, so that it has some degree of freedom in the radial direction. However, in this case, there is a problem in that it is difficult to control the amount of caulking during the riveting work, and caulking failures frequently occur.

In addition, in the cross roller bearing using bolt B,
In order to absorb the misalignment of the through hole 65, the through hole 6
It is common practice to use bolt B with a smaller diameter than 5, and to loosely tighten nut N. In this case,
Since it is necessary to fix the nut N with adhesive so that it does not come off the bolt B, there is a problem in that extra man-hours are required.

Furthermore, even in the above case, the annular finishing member R
1. On one side of R2, so that the head of the rivet L, the head of the bolt B, the nut N, etc. do not protrude from the side.
Since it is necessary to perform counterbore processing, there is a problem in that extra man-hours are required. Moreover, during maintenance such as internal inspection, the integrated annular finishing member R
1. Since it is difficult to separate R2, there is a problem in that the maintenance is time-consuming.

The second invention has been made in view of the above problems, and aims to provide a loss roller bearing that can be easily and efficiently manufactured and also easy to maintain.

Another object of the present invention is to provide a manufacturing method suitably applied to the above-mentioned cross roller bearing.

Means for Solving the Problems To achieve the above object, the cross roller bearing of the present invention includes a plurality of rollers arranged between V-shaped raceways formed on opposing surfaces of an inner ring and an outer ring. In a cross roller bearing in which one of the inner ring and outer ring is divided into two by a plane perpendicular to the axis, a through-hole is provided that communicates with the two halves in the axial direction. It is characterized in that a hole is provided and a knock pin is fitted into the through hole so that the two halves of the bearing ring are integrated.

Further, in the method for manufacturing a cross roller bearing of the present invention, a plurality of rollers are arranged between V-shaped raceways formed on opposing surfaces of an inner ring and an outer ring, and one of the inner ring and outer ring is A method for manufacturing a bisected bearing ring of a cross roller bearing in which the bearing ring is divided into two along a plane perpendicular to the axis, the annular body as a material of the bearing ring being approximately While holding the annular bodies concentrically, simultaneously machine a pin hole that passes through both annular bodies parallel to the axis, drive a dowel pin into the pin hole, heat treat the two annular bodies in a unified state, and then insert the dowel pin into the pin hole. After pulling it out of the hole and separating both annular bodies, width polishing is performed, and then,
The method is characterized in that a dowel pin is driven into the pin hole to re-integrate the annular body, and then finishing processing is performed.

Effects> According to the cross roller bearing having the above configuration, the two divided bearing rings can be integrated by simply inserting the dowel pins into the through holes provided in the two bearing rings. Furthermore, by pulling out the fitted dowel pin, the integrated bearing ring can be easily separated. Furthermore, since the dowel pins are used for integration, there is no need to perform counterboring on the side surface of the bearing ring.

On the other hand, according to the above-mentioned method for manufacturing a cross roller bearing, pin holes are simultaneously machined in the two annular bodies, which are the raw materials for the divided bearing rings, while the two annular bodies are held approximately concentrically. Opposing pin holes of the annular body can be formed concentrically. Also, since a dowel pin is driven into the pin hole and the two annular bodies are heat-treated in an integrated state,
The dowel pin can prevent misalignment between the opposing pin holes due to heat treatment distortion. Furthermore, after the above processing, the dowel pin is removed from the pin hole and both annular bodies are separated, width polishing is performed, and then the dowel pin is driven into the pin hole to integrate the annular bodies again for finishing processing. Even in the processing step after heat treatment, there is no risk of misalignment between the opposing pin holes.

Therefore, after completing the finishing process, the dowel pin is pulled out to separate one half of the two-part raceway ring from the other, and after the rollers and other parts are assembled, the dowel pin is driven in again. and the other can be concentrically integrated.

<Example> Hereinafter, embodiments will be described in detail with reference to the accompanying drawings showing examples.

FIG. 1 is a process diagram showing a method for manufacturing a cross roller bearing according to the present invention, and shows the case of manufacturing a cross roller bearing in which an outer ring 1 (see (J) in the same figure) is divided into two parts.

First, as shown in FIG. 3(a), annular bodies AI and A2 as raw materials for the outer ring 1 are manufactured. This annular body AI, A
2 is manufactured by turning pipe material or forged material, and its inner peripheral surface has a tapered surface for forming a ■-shaped raceway surface 14 (see (1) in the same figure). 11
is formed, and a seal S (see (j) in the same figure)
A seal groove 12 for fitting is formed.

Next, the annular bodies A1 and A2 are stacked and integrated so that their axes substantially coincide with each other, and a drill D is used to form pin holes 13 at multiple locations through both the annular bodies A1 and A2. . The axis of this pin hole 13 is the annular body AI,
Form it so that it is parallel to the axis of A2. By machining the pin holes 13 in the annular bodies A1 and A2 at the same time in this way, the axes of the pin holes 13a of the annular body A1 and the pin holes 13b of the annular body A2 can be made concentric with each other. (See figure (b)).

After processing the pin holes 13, the annular bodies A1 and A
A dowel pin 4 such as a spring pin is driven into each of the pin holes 13a and 13b of No. 2 to integrate the annular bodies A1 and A2 (see FIG. 2C).

Thereafter, the annular bodies A1 and A2 integrated by the knock pin 4 are subjected to heat treatment such as hardening and tempering (see FIG. 4(d)). In this way, the pin holes 1 of the annular bodies A1 and A2
By performing heat treatment with the dowel pin 4 driven into the annular body A1, the pin hole 1 of the annular body A1 is damaged due to heat treatment distortion.
It is possible to prevent misalignment between the pin hole 13b of the annular body A2 and the pin hole 13b of the annular body A2.

Furthermore, after the above heat treatment is completed, the dowel pin 4 driven into the pin hole 13 is pulled out to separate the annular bodies A1 and A2 (see figure (e)). Each width surface of A2 is individually polished (see figure (r)).

After completing the above width polishing, each annular body A1, A
A dowel pin 4 is driven into the pin hole 13 of No. 2 to integrate the two (see figure (g)). At this time, the annular bodies A1 and A2
The tapered surfaces 11 are integrated so that they face each other. And these integrated annular bodies A1, A2
The outer peripheral surface of is polished using a centerless grinder (see (h) in the same figure).

After completing the polishing of the outer peripheral surface, the annular bodies A1 and A
2 is integrated, the tapered surface 11 is polished and finished (see (1) in the same figure). This polishing is performed by simultaneously grinding the tapered surfaces 11 of both the annular bodies A1 and A2 using a cylindrical grinder. After this grinding is completed, the tapered surface 11 is superfinished to obtain the raceway surface 14.

In this way, the outer peripheral surfaces and tapered surfaces 1 of the annular bodies A1 and A2
The finishing process of step 1 is applied to both annular bodies A1,
Since this is done with A2 integrated, both pin holes 13a, 1
3b, there is no risk of misalignment occurring.

Next, the dowel pin 4 is pulled out from the pin hole 13 to separate the annular bodies A1 and A2 from each other, and the annular bodies A1 and A2 are joined to the separately formed inner ring 2, roller 3, and retainer (not shown). , seal S, etc., and then drive the dowel pins 4 into the pin holes 13 of each of the annular bodies A1 and A2 again to complete the assembly of the cross roller bearing (see U in the same figure).

In this way, according to the above embodiment, the outer ring 1 is divided into two parts.
The respective pin holes 13a and 13b of one and the other of
Since the pin holes 13a can be formed concentrically, the pin holes 13a can be formed concentrically in the final assembly process.

By simply driving the dowel pin 4 into 13b, one side of the outer ring 1 and the other side can be integrated without causing misalignment. In addition, there is no need to counterbore the portion corresponding to the pin hole 13 on one side of the outer ring 1, and the integration and separation of the annular bodies A1 and A2 in the middle of the process can be done by simply driving in and pulling out the dowel pin 4. Since it can be easily carried out, manufacturing can be carried out efficiently.

In addition to the spring pin, the knock pin 4 may be a split pin with a split tip (see FIG. 2).

Further, the method for manufacturing a cross roller bearing of the present invention can be applied to a cross roller bearing in which the inner ring 2 side is divided into two parts, and in this case, the above-mentioned steps may be performed sequentially for the inner ring 2.

<Effects of the Invention> As described above, according to the cross roller bearing of the present invention,
Since the partial raceway rings are integrated by dowel pins, the raceway rings can be easily integrated and separated, and as a result, manufacturing and maintenance can be performed easily and efficiently.

Further, according to the method for manufacturing a cross roller bearing of the present invention, pin holes are simultaneously formed in a pair of annular bodies as materials forming the two-part bearing ring, and knock pins are driven into the pin holes, thereby both With the annular body integrated,
Since heat treatment and finishing are performed, the through holes of one and the other of the two divided bearing rings can be formed concentrically.

Therefore, in the final assembly, one and the other of the bearing rings can be integrated without misalignment by simply driving a dowel pin into the through hole. Therefore, a unique effect is achieved in that the cross roller bearing can be manufactured easily and efficiently.

[Brief explanation of drawings]

FIG. 1 is a process diagram showing one embodiment of the method for manufacturing a cross roller bearing of the present invention, and FIG. 2 is a cross-sectional view of essential parts showing another embodiment of the knock pin. 3 and 4 are sectional views of main parts showing a conventional example. DESCRIPTION OF SYMBOLS 1... Outer ring, A1, A2... Annular body, 13... Pin hole, 14... Raceway surface, 2... Inner ring, 3... Roller, 4... Dowel pin.

Claims (1)

[Claims] 1. A plurality of rollers are arranged between V-shaped raceways formed on opposing surfaces of the inner ring and outer ring, and one of the raceways of the inner ring and the outer ring is connected to the shaft. In a cross roller bearing that is bisected in a plane perpendicular to the center, a through hole communicating in the axial direction is provided in the bisected bearing ring, and a knock pin is inserted into the through hole to separate the bisected bearing ring. A cross roller bearing characterized by being integrated with. 2. A plurality of rollers are arranged between V-shaped raceways formed on opposing surfaces of the inner ring and outer ring, and one of the raceways of the inner ring and outer ring is perpendicular to the axis. A method of manufacturing a raceway ring of a cross roller bearing that is divided into two parts along a plane, the method comprising penetrating both annular bodies while holding the annular body as a material of the raceway substantially concentrically. Simultaneously machine a pin hole parallel to the axis, drive a dowel pin into the pin hole, heat treat both annular bodies in a unified state, and then remove the dowel pin from the pin hole to separate both annular bodies. A method for manufacturing a cross roller bearing, characterized in that width polishing is performed, and then a dowel pin is driven into the pin hole to integrate the annular body again, and finishing processing is performed.