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Resin molded sliding bearing and manufacturing method thereof, and tubing pump and manufacturing method thereof

A sliding bearing and resin forming technology, applied in sliding contact bearings, rotating bearings, bearings, etc., can solve problems such as quality deterioration, bearing scars, bearing deformation, etc., to reduce gear noise, eliminate high-range noise, and reduce noise. The effect of gear noise

Inactive Publication Date: 2012-05-23
雅科汰泵业株式会社
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] However, in the method of forming the oil-reserving recess by the above-mentioned overpressing method, the inner diameter of the bearing may be scratched or the entire bearing may be deformed, which may degrade the quality.
In addition, there is also the problem of excessive man-hours for implementing the over-pressing construction method

Method used

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  • Resin molded sliding bearing and manufacturing method thereof, and tubing pump and manufacturing method thereof
  • Resin molded sliding bearing and manufacturing method thereof, and tubing pump and manufacturing method thereof
  • Resin molded sliding bearing and manufacturing method thereof, and tubing pump and manufacturing method thereof

Examples

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Effect test

no. 1 approach

[0065] refer to figure 1 A method of manufacturing the sliding bearing according to the first embodiment of the present invention will be described. Sliding bearings are bearings that receive the shaft on the sliding surface. Since the shaft is used in a state where the shaft floats on an oil film, an oil film must be formed during use.

[0066] As the existing method of providing a recess for oil storage, there are methods of providing an annular groove on the shaft and a method of providing an annular groove on the inner periphery of the bearing, etc., but in the above methods, secondary processing is required, so there are manufacturing The disadvantage of high cost. In addition, as a method that does not require secondary processing, there is a method of forming a recess for oil storage by using an overpress method, but there is a disadvantage that the quality deteriorates due to scratches or deformation on the inner diameter.

[0067] In the manufacturing method of the ...

Embodiment 1

[0074] to use figure 1 The mold shown in (1) is manufactured with figure 1 An example of the resin-molded sliding bearing used for the oil-reserving recess shown in (2) will be described. here, in will figure 1 (1) The dimensions of the mold shown in (1) were set to a=8mm, b=5mm, c=15mm, and d=20mm, and when POM resin (polyacetal) was used as the resin, it was verified that R2≒4.03mm could Form R1≒4.13-4.33 mm, that is, a recessed portion having a groove depth ((R1-R2) / 2) of 50-150 μm and a length L of 5-6 mm. As can be seen from the above, as the conditions for forming a desired concave portion, it is preferable to set c≧3b and a≧2L, for example.

no. 2 approach

[0076] In a second embodiment of the present invention, a method of manufacturing a tube pump using the method of manufacturing a sliding bearing according to the first embodiment will be described.

[0077] (1) Structure of tube pump

[0078] use Figure 3 ~ Figure 5 The structure of the tube pump will be described. Such as Figure 3 ~ Figure 5 As shown, the tube pump 1 is housed in a frame 2 serving as a pump casing. The frame body 2 includes a bottomed box-shaped frame body body 2 a having an opening, and a frame body cover 2 b covering the opening of the frame body body 2 a.

[0079] The tube pump 1 includes a pump housing 3 in which a cylindrical chamber 31 is formed, a pipe member 4 , an annular pressing member 5 , an eccentric rotor 6 , and a motor 7 . The pump casing 3 also serves as the frame cover 2b. The pipe 4 is arranged in a ring shape along the inner peripheral surface 32 of the cylindrical chamber 31 , has a fluid inlet 41 a at one end, and has a fluid out...

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Abstract

The invention provides a low-quality-deterioration sliding bearing which can be manufactured with low cost, a manufacturing method thereof, and a tubing pump employing the manufacturing method. A mold represented by a figure 1(1) is used for manufacturing a resin molded sliding bearing with a recess represented by a figure 1(2), wherein the recess is used for accumulating oil. The sliding bearing (60) which can freely rotate around a fixed shaft is formed, wherein the fixed shaft is inserted into a through shaft hole (61). During the process, with a shrinkage cavity phenomenon, the recess used for accumulating oil is formed in the center on a length direction of the shaft hole (61). The shrinkage cavity phenomenon means that: resin is filled in a mold which is set with a manner that the wall thickness size of the sliding bearing (60) at the center on the length direction is larger than the wall thickness sizes of the sliding bearing (60) at the two ends on the length direction; the resin is cooled, and the central part with lager volume on the length direction is subject to severer shrinkage. With the manufacturing method, the integral resin-molded mechanism for the worm wheels and the eccentric rotor of the tubing pump can perform as a sliding bearing.

Description

technical field [0001] The present invention relates to a sliding bearing and a manufacturing method thereof, and more particularly to a tube pump using the manufacturing method thereof. Background technique [0002] In the prior art, there is known a tube pump in which a tubular member arranged in an annular shape along the inner surface of a cylindrical chamber is pressed by an eccentric movement of an annular pressing member provided inside the annular shape to exert a pumping effect. Pump action (for example, refer to Patent Document 1). Compared with a tube pump in which a roller directly presses a tube, such a tube pump indirectly presses through a ring-shaped pressurizing member, so that the tube is less damaged and has a longer life. [0003] In the tube pump described above, the rotation of the motor is decelerated by the worm gear pair and is transmitted to the eccentric rotor, whereby the eccentric rotor rotates to cause the annular pressurizing member to move ec...

Claims

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Application Information

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IPC IPC(8): F16C17/00F16C33/20F04C2/10
Inventor 玉川长雄
Owner 雅科汰泵业株式会社
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