Rolling shaft sleeve press-fitting device

Abstract

The utility model discloses a rolled shaft sleeve press-fitting device. Comprising a pressing body and further comprises a guide sleeve, the pressing body comprises a press-fitting mandrel, the press-fitting mandrel comprises a pressure guide positioning part and a guide part connected to the pressure guide positioning part, the pressure guide positioning part is matched with an inner hole of the rolled shaft sleeve, and a guide inner hole of the guide sleeve is matched with an outer circle of the rolled shaft sleeve. According to the rolled shaft sleeve press-fitting device, the problem that the press-fitting precision is poor due to the fact that the press-fitting depth is difficult to control is solved, and the rolled shaft sleeve press-fitting device is simple in structure and convenient to operate.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of mechanical assembly tooling technical field, specifically related to a kind of coiled shaft sleeve press-fitting device for hydraulic gear pump. BACKGROUND

[0002] In the field of hydraulic gear pump manufacturing, coiled shaft sleeve as the key part of hydraulic gear pump, has a pivotal role to the service life and performance of hydraulic gear pump. After coiled shaft sleeve is pressed, both the inner hole press-fit size of coiled shaft sleeve after pressing is detected using go-no-go gauge, to prevent the inner hole deformation of coiled shaft sleeve due to pressing, affecting the shaft sleeve and gear shaft diameter ablation damage. And the pressing depth of coiled shaft sleeve is controlled, to prevent the shaft sleeve from protruding bearing seat plane, leading to gear pump axial gap too small to burn side plate, or the shaft sleeve is pressed too deep, leading to high-pressure oil to damage 3 character seal cover. In ideal state, coiled shaft sleeve press-fitting device should ensure that the shaft sleeve is pressed in depth 0.1-0.15mm. The existing press-fitting device uses mandrel to insert into the inner hole of coiled shaft sleeve, the middle part of mandrel has flange end face to block the end face of shaft sleeve, and the shaft sleeve is pressed into place, and the pressing depth cannot be guaranteed. Because the inner hole of bearing seat is smaller than the outer diameter of coiled shaft sleeve, it is easy to cause pressing distortion, shaft sleeve inner hole size deformation, shaft sleeve outer ring and bearing seat inner hole scratch due to uneven placement of shaft sleeve during pressing. SUMMARY

[0003] The utility model aims at providing a kind of coiled shaft sleeve press-fitting device, which avoids the problem of poor pressing precision caused by difficult control of pressing depth, and has simple structure and convenient operation.

[0004] To achieve the above object, the utility model provides the following technical scheme: a kind of coiled shaft sleeve press-fitting device, including pressing body, further including guide sleeve, the pressing body includes press-fit mandrel, the press-fit mandrel includes guide pressure positioning part, and the guide pressure positioning part is connected with the guide pressure positioning part, the guide pressure positioning part is adapted to the inner hole of coiled shaft sleeve, the guide hole of guide sleeve is adapted to the outer circle of coiled shaft sleeve, and the guide pressure positioning part is between guide and is equipped with press-fit mesa.

[0005] One end of the guide sleeve is provided with a receiving cavity corresponding to the corresponding workpiece.

[0006] One end of the guide portion of the press-fit mandrel is provided with a limiting mesa corresponding to one end of the guide hole of the guide sleeve.

[0007] The press-fit mesa of the press-fit mandrel is composed of the combination step surface of the guide portion and the guide pressure positioning part.

[0008] The length of the guide hole of the guide sleeve is less than the corresponding length of the guide portion of the press-fit mandrel.

[0009] One end of the guide portion of the press-fit mandrel is connected with a holding portion.

[0010] The outer peripheral wall of the holding part is provided with a net pattern.

[0011] The utility model discloses the beneficial effect of: it utilizes the setting guide sleeve auxiliary placement shaft sleeve, can pass through the difference of adjusting guide sleeve thickness that is guiding inner hole length size and mandrel length size, control shaft sleeve press -in depth, guarantee shaft sleeve press -mount quality. BRIEF DESCRIPTION OF DRAWINGS

[0012] Fig. 1 It is the axial section view of the workpiece press -mount working state structure of the utility model; Fig. 2 It is the axial section view of the press -mount mandrel structure of the utility model; Fig. 3 It is the axial section view of the guide sleeve structure of the utility model. DETAILED DESCRIPTION

[0013] In order to better understand the technical scheme of the utility model, now through the embodiment combining with the drawing to the utility model make clear complete explanation. Obviously, the described embodiment only is a part embodiment of the utility model, instead of all the embodiment. Based on the embodiment in the utility model, all other embodiments that the ordinary skill in the art person obtains without making creative labor belong to the range of protection of the utility model.

[0014] Please refer to Figs. 1-3 The utility model roll -up shaft sleeve press -mount device includes guide sleeve 1, press -mount mandrel 2 etc.

[0015] Its guide sleeve 1 includes guiding inner hole 1a and the containing cavity 1b that are communicated to the guiding inner hole. Its press -mount mandrel 2 includes the guiding portion 2b and the guide pressure positioning portion 2c that are connected to each other, the holding portion 2a connected to one end of the guiding portion, and the press -mount action portion 2e etc. The outer diameter of the guiding portion 2b is greater than the outer diameter of the guide pressure positioning portion 2c, and the press -mount action portion 2e is formed by the step surface that the guiding portion and the guide pressure positioning portion are connected to each other.

[0016] The outer peripheral wall of the one end of the guiding portion of the press -mount mandrel 2 and the holding portion 2a is provided with the press -mount stroke limiting mesa 2f, and the limiting mesa 2f corresponds to the end surface of the guiding inner hole of the guide sleeve 1.

[0017] The connecting step surface of the guiding inner hole 1a and the containing cavity 1b of the guide sleeve corresponds to the corresponding one end of the corresponding workpiece, i.e. the part 4. The press -mount action portion 2e corresponds to the corresponding one end surface of the roll -up shaft sleeve 3.

[0018] The outer diameter of the guiding portion of the press -mount mandrel 2 is slightly smaller than the corresponding outer diameter of the roll -up shaft sleeve 3. The containing cavity of the guide sleeve is gap fitted with the corresponding part outer circle, which is convenient for sleeving. The guiding inner hole 1a of the guide sleeve 1 and the roll -up shaft sleeve 3 are gap fitted in the free state, i.e. the outer diameter is small, which provides the guiding effect for the roll -up shaft sleeve 3.

[0019] The outer diameter of the pressure guide positioning part 2c of the pressing mandrel 2 constitutes a pressing positioning outer circle, which is inserted into the inner hole of the coiled shaft sleeve during pressing to center.

[0020] The length of the guide inner hole 1a of the guide sleeve 1 is less than the corresponding length of the guide part of the pressing mandrel, that is, the length dimension a of the guide sleeve 1 and the length dimension b of the guide part 2b of the pressing mandrel 2 have the following relationship: the length dimension b of the guide part 2b of the pressing mandrel minus the length dimension a of the guide sleeve 1 or the guide inner hole 1a thereof is equal to 0.1-0.15 mm, which is the designed pressing depth dimension of the coiled shaft sleeve.

[0021] The inner hole size of the pressing mandrel 2 after the pressing of the pressure guide positioning part and the coiled shaft sleeve is in clearance fit, which facilitates the pulling out of the pressing mandrel 2 after pressing. The drilling 2d is used in the pressing mandrel 2 to reduce the weight of the tooling and reduce the labor intensity of the operator.

[0022] The outer circle diameter of the gripping part of the pressing mandrel 2 is reduced to φ25, and the outer circle is designed with a net texture 2a1, which has an anti-skid effect, facilitates the gripping of the operator, and conforms to the ergonomics.

[0023] The guide sleeve 1 and the pressing mandrel 2 are both subjected to low-carbon steel carburizing and quenching treatment to improve the surface hardness, improve the wear resistance, and prolong the service life of the tooling.

[0024] Under the premise of ensuring the mechanical strength, during use, the part 4 to be pressed with the coiled shaft sleeve is first placed on the pressing oil press work platform, and the containing cavity 1b of the guide sleeve 1 is sleeved on the outer circle of the part 4. The coiled shaft sleeve 3 to be pressed is placed in the guide inner hole of the guide sleeve 1, and finally the pressing mandrel 2 is inserted into the guide inner hole of the coiled shaft sleeve. The upper surface of the pressing mandrel 2 is pressed flat using the oil press, so that the coiled shaft sleeve is stably pressed in. When the pressing depth reaches the designed depth of 0.1-0.15 mm, the limiting table surface 2f of the pressing mandrel 2 contacts the end surface of the guide inner hole of the guide sleeve 1, the pressing force of the oil press is transmitted to the surface of the part, and the pressing depth of the coiled shaft sleeve is prevented from exceeding the designed value. After the pressing is completed, the pressing mandrel 2 is pulled out, the guide sleeve 1 is removed, and the go-no-go gauge is used to detect whether the size of the coiled shaft sleeve after pressing is qualified.

[0025] Although the embodiments of the utility model have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and spirits of the utility model, and the scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. A roll collar press fitting device comprising a press body, characterized by: The device also comprises a guide sleeve, the pressing body comprises a pressing mandrel, the pressing mandrel comprises a guide pressing positioning part and a guide part connected to the guide pressing positioning part, the guide pressing positioning part is adapted to the inner hole of the rolling sleeve, the guide inner hole of the guide sleeve is adapted to the outer circle of the rolling sleeve, and a pressing action part is arranged between the guide pressing positioning part and the guide part.

2. The roll collar press fitting device according to claim 1, wherein: One end of the guide sleeve is provided with a containing cavity corresponding to the corresponding workpiece.

3. The roll collar press fitting apparatus according to claim 1, wherein: One end of the guide part of the pressing mandrel is provided with a limiting platform corresponding to one end of the guide inner hole of the guide sleeve.

4. The roll collar press fitting apparatus according to claim 1, wherein: The pressing action part of the pressing mandrel is composed of the combined step surface of the guide part and the guide pressing positioning part.

5. The roll collar press fitting apparatus according to claim 1, wherein: The length of the guide inner hole of the guide sleeve is less than the corresponding length of the guide part of the pressing mandrel.

6. The roll collar press fitting apparatus according to claim 1, wherein: One end of the guide part of the pressing mandrel is connected with a holding part.

7. The roll collar press fitting apparatus according to claim 6, wherein: The outer peripheral wall surface of the holding part is provided with a net pattern.

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