CN203383976U

CN203383976U - Sealing cover applied to hydraulic motor

Info

Publication number: CN203383976U
Application number: CN201320420565.6U
Authority: CN
Inventors: 周莉刚; 范建良
Original assignee: NINGBO OUYI HYDRAULICS CO Ltd
Current assignee: NINGBO OUYI HYDRAULICS CO Ltd
Priority date: 2013-07-12
Filing date: 2013-07-12
Publication date: 2014-01-08
Anticipated expiration: 2023-07-12

Abstract

The utility model relates to a sealing cover applied to a hydraulic motor. The sealing cover is characterized by comprising a large sealing cover and a small sealing cover, wherein the large sealing cover comprises a first substrate with a center hole; the inner end face of the first substrate is provided with a first inserting part; the outer circumference surface of the first inserting part is inserted into an inner hole of a housing, and the inner circumference surface of the first inserting part is used for mounting a bearing; the periphery of the first substrate forms an annular first location shoulder part. The small sealing cover comprises a second substrate with a ladder through hole; the inner end face of the second substrate is provided with a second inserting part which is inserted into a center hole of the large sealing cover; the periphery of the second substrate forms an annular second location shoulder part; the second inserting part of the small sealing cover and the center hole of the first substrate of the large sealing cover form clearance fit. By using a split structure, when an axial gap of the bearing is adjusted and easily-worn oil seal is replaced, only the sealing cover is required to be dismounted; as the clearance fit is formed between the second inserting part and the center hole, the sealing cover is easy and convenient to operate and is good for improving the working efficiency and reducing the cost.

Description

Capping for oil hydraulic motor

Technical field

The utility model relates to a kind of oil hydraulic motor, specifically refers to a kind of for the capping on oil hydraulic motor.

Background technique

Existing crank shaft-connection-lever type hydraulic generally includes housing, bent axle, logical food tray, oil distribution casing, plunger case, capping and crankshaft group, wherein, the central position of capping has ladder hole, as shown in Figure 3, ladder hole passes for the output shaft of oil hydraulic motor, and bearing and the oil sealing be enclosed within on output shaft is installed simultaneously in this shoulder hole; There is to insert the insertion part in the housing endoporus on the capping interior edge face, the periphery of capping has annular location shoulder, it between the inner hole wall of insertion part and housing, is Spielpassung, and the middle part of the outer circumferential face of insertion part has to install the mounting groove of seal ring, the sealing circle forms liquid sealing between the outer circumferential face of insertion part and inner hole wall, and the location shoulder is fitted and also is fixed on housing by a plurality of screws with the exterior edge face of housing.

Adopt above-mentioned closure construction, the inner chamber of enclosing housing preferably, but find in installation process, error existence due to each part, be arranged on after bearing axial clearance in ladder hole need to repeatedly be regulated and just can meet the demands, when bearing axial clearance is too tight, usually between the exterior edge face of the interior edge face of the location of capping shoulder and housing, install pad additional, through repeatedly just reaching technical requirements after repeatedly; If, when bearing axial clearance is too loose, need to pull down capping, the thickness A of processing location shoulder, make it to reduce.Obviously, adopt such processing mode, waste time and energy, and if the location shoulder thickness by overprocessing, the phenomenon that also can cause capping to be scrapped.

Especially, oil hydraulic motor in work, make capping be subject to axial pulling force and alternating stress radially, alternating stress is wherein born by the screw of fixedly capping fully, in order to make not easy-rupturing of screw, transition or interference fit will be designed to, as the patent No. Chinese model utility that is CN201120356017.2 has just disclosed the capping of this oil hydraulic motor between the inner hole wall of the insertion part of capping and housing.Can such structure make more wasting time and energy of above-mentioned disassemble and assemble work change, finally the replacing to bearing axial clearance adjustment and rapid wear oil sealing has brought very large difficulty.

Summary of the invention

Technical problem to be solved in the utility model is for above-mentioned prior art present situation, and provides a kind of bearing shaft of being convenient to the capping for oil hydraulic motor of adjusting gap and oil seal replacement.

The utility model solves the problems of the technologies described above adopted technological scheme: a kind of capping for oil hydraulic motor is characterized in that: comprise large capping and small cover; In the middle part of comprising, described large capping radially has the first matrix that center hole and exterior edge face have a plurality of tapped holes, having outer circumferential face on the interior edge face of described the first matrix inserts in the endoporus of housing and inner peripheral surface is used for bearings mounted the first insertion part, the periphery of described the first matrix forms the first location shoulder of annular, on this first location shoulder, has a plurality of the first mounting holes; Described small cover comprises that middle part has the second matrix of ladder hole, there is to insert the second insertion part of the center hole of described large capping on the interior edge face of described the second matrix, the end face of this second insertion part is used for offseting with above-mentioned bearing, the periphery of described the second matrix forms the second location shoulder of annular, on this second location shoulder, has the second corresponding mounting hole of a plurality of tapped holes in a plurality of and described large capping; The second insertion part of described small cover and the center hole of described large capping form Spielpassung,, between the surface of contact of large and small capping, have for the seal groove of the first seal ring is installed simultaneously.

As improvement, have to install the mounting groove of the second seal ring at the middle part of the outer circumferential face of the first insertion part of described large capping, described the first insertion part is Spielpassung between the endoporus of the end before described mounting groove and housing, and described the first insertion part is transition or interference fit between the endoporus of the root after described mounting groove and housing.End and endoporus Spielpassung make while being sealed on greatly assembling and easily the end of the first insertion part are inserted in the endoporus of housing, then the root of the first insertion part is pressed in the endoporus of housing, the root that makes the first insertion part is together with the endoporus hole wall close contact of housing, the transition of root and endoporus or interference fit can be so that the suffered alternating stress radially of capping be born by housing fully like this, rather than born by the screw of fixedly capping, therefore the screw indefatigability is destroyed and is ruptured, thereby can extend the working life of product.

Improve, described seal groove is positioned on the outer end of center hole of described the first matrix again.For realizing the sealing between large and small capping, on the outer end of described center hole, can reduce difficulty of processing to seal groove processing.

Compared with prior art, the utility model has the advantage of: the capping of oil hydraulic motor of the present utility model adopts Split type structure, between small cover and large capping, adopts Spielpassung, conveniently small cover is disassembled from large capping.Therefore when bearing axial clearance is too tight, can unscrew the screw that is arranged in the first mounting hole, locate the interior edge face shimming of shoulder in first of large capping; When bearing axial clearance when pine too, can be at the end washers pad of the second insertion part of small cover; Only need pull down small cover when needs are changed oil sealing gets final product.So only by the dismounting small cover, just can adjust bearing axial clearance and change the rapid wear oil sealing, not only convenient but also simple.In addition, in further scheme, the root diameter (RD) of large capping meets endoporus formation transition or the interference fit with housing, and effective radially alternating stress that must capping is suffered passes to housing, make the screw indefatigability destroy and rupture, thereby can extend the working life of product.

The accompanying drawing explanation

The structure sectional view of the capping that Fig. 1 is the utility model oil hydraulic motor;

The scheme of installation in oil hydraulic motor that is sealed on that Fig. 2 is the utility model oil hydraulic motor;

The scheme of installation in oil hydraulic motor that is sealed on that Fig. 3 is existing oil hydraulic motor.

Embodiment

Below in conjunction with accompanying drawing, embodiment is described in further detail the utility model.

As shown in Figure 1, 2, a kind of capping for oil hydraulic motor is Split type structure, comprises large capping 1 and small cover 2.Large capping 1 is arranged on housing 4, and small cover 2 is arranged in large capping 1.

Large capping 1 comprises that middle part radially has the first matrix 11 of the uniform a plurality of tapped holes 112 of center hole 113 and exterior edge face, having outer circumferential face on the interior edge face of the first matrix 11 inserts in the endoporus 41 of housing 4 and inner peripheral surface is used for the first insertion part 12 that close-fitting installs bearing 7, form the first location shoulder 13 of annular at the periphery of the first matrix 11, on this first location shoulder 13, have a plurality of the first mounting holes 131.

Small cover 2 comprises that middle part has the second matrix 21 of ladder hole 211, there is to insert the second insertion part 22 of the center hole 113 of large capping 1 on the interior edge face of the second matrix 21, the end face 221 of this second insertion part 22 is used for offseting with above-mentioned bearing 7, form the second location shoulder 23 of annular at the periphery of the second matrix 21, have the second corresponding mounting hole 231 of tapped hole 112 in a plurality of and large capping 1 on this second location shoulder 23.Wherein the second insertion part 22 of small cover 2 forms Spielpassung with the center hole 113 of large capping 1.Simultaneously, have the seal groove 111 for the first seal ring 3 is installed between the surface of contact of large and small capping, sealing groove 111 is positioned on the outer end of center hole 113 of the first matrix 11.

As a preferred embodiment of the present utility model.While has to install the mounting groove 123 of the second seal ring 5 at the middle part of the outer circumferential face of the first insertion part 12 of large capping 1, this first insertion part 12 is Spielpassung between the endoporus 41 of the end 121 before mounting groove 123 and housing 4, and this first insertion part 12 is transition or interference fit between the endoporus 41 of the root 122 after mounting groove 123 and housing 4.By adopting such structure, not only convenient large capping 1 is inserted in housing 4, and the alternating stress produced while being conducive to oil hydraulic motor is worked passes to housing 4, avoid directly acting on the mounting screw of capping.

The installation of this closure construction in oil hydraulic motor is identical with existing capping mounting type.Owing to having adopted Split type structure, this axial tune gap that is bearing 7 provides new approach.When bearing 7 axial clearances are too tight, without the large capping of dismounting, as long as unscrew the screw that is arranged in the first mounting hole, can be directly in first of large capping 1, locate cushioning pad between the exterior edge face 42 of the interior edge face 132 of shoulder 13 and housing; When bearing 7 axial clearances when pine too, pull down small cover 2, can be directly end face 221 in the second insertion part 22 of small cover 2 pad pads.Like this without the dismounting, process the tune gap work that large capping 1 has just realized bearing, thereby make efficiency of assembling be able to obvious raising.While needing to change oil sealing 6 in addition after work a period of time, also only need pull down small cover 2 and get final product, facilitate widely maintenance in the future.

Claims

1. the capping for oil hydraulic motor is characterized in that: comprise large capping (1) and small cover (2); In the middle part of comprising, described large capping (1) radially has the first matrix (11) that center hole (113) and exterior edge face have a plurality of tapped holes (112), there is the first insertion part (12) that outer circumferential face inserts in the endoporus (41) of housing (4) and inner peripheral surface is used for installing bearing (7) on the interior edge face of described the first matrix (11), the periphery of described the first matrix (11) forms the first location shoulder (13) of annular, on this first location shoulder (13), has a plurality of the first mounting holes (131); described small cover (2) comprises that middle part has second matrix (21) of ladder hole (211), there is to insert second insertion part (22) of the center hole (113) of described large capping (1) on the interior edge face of described the second matrix (21), the end face (221) of this second insertion part (22) is used for offseting with above-mentioned bearing (7), the periphery of described the second matrix (21) forms the second location shoulder (23) of annular, have corresponding the second mounting hole (231) of a plurality of tapped holes (112) in a plurality of and described large capping (1) on this second location shoulder (23), second insertion part (22) of described small cover (2) forms Spielpassung with the center hole (113) of described large capping (1), simultaneously, have the seal groove (111) for the first seal ring (3) are installed between the surface of contact of large and small capping (2), (1).

2. the capping for oil hydraulic motor according to claim 1, it is characterized in that: the middle part at the outer circumferential face of first insertion part (12) of described large capping (1) has to install the mounting groove (123) of the second seal ring (5), described the first insertion part (12) is Spielpassung between the endoporus (41) that is positioned at end (121) before of described mounting groove (123) and housing (4), and described the first insertion part (12) is transition or interference fit being positioned between the endoporus (41) of described mounting groove (123) root (122) afterwards and housing (4).

3. the capping for oil hydraulic motor according to claim 1 and 2 is characterized in that: described seal groove (111) is positioned on the outer end of center hole (113) of described the first matrix (11).