CN112428218A

CN112428218A - Manual gear pump shaft sleeve press-fitting device and press-fitting method

Info

Publication number: CN112428218A
Application number: CN202011317955.1A
Authority: CN
Inventors: 屈盛官; 方波; 杨丽华; 赵馨雨; 吴志兵; 贾思钰
Original assignee: South China University of Technology SCUT
Current assignee: South China University of Technology SCUT
Priority date: 2020-11-23
Filing date: 2020-11-23
Publication date: 2021-03-02
Anticipated expiration: 2040-11-23
Also published as: CN112428218B

Abstract

The invention discloses a manual gear pump shaft sleeve pressing device and a pressing method. The device includes a frame, a hydraulic drive mechanism, an upper pressing plate, a lower pressing plate, a pressing shaft, a positioning member and an elastic member. The frame includes The base, the column and the upper top plate, the pressing shaft, the positioning piece, the elastic piece and the column are all two, and the elastic piece and the column are in a one-to-one correspondence; the two ends of each column are respectively fixedly connected with the upper top plate and the base, and Each upright column is slidably connected to the upper pressing plate, the hydraulic drive mechanism is fixed on the upper top plate, and is connected to the upper pressing plate, the upper pressing plate is fixedly connected to the lower pressing plate, the lower pressing plate is fixedly connected to the pressing shaft, and each elastic piece covers The two ends of each elastic piece are respectively fixedly connected with the upper pressing plate and the base. The device of the invention can simultaneously complete the press-fitting of two shaft sleeves at one time, has high assembling precision, simple operation, low labor intensity, greatly shortens assembling time and high working efficiency.

Description

Manual gear pump shaft sleeve press-fitting device and press-fitting method

Technical Field

The invention relates to a manual gear pump shaft sleeve press-fitting device and a press-fitting method, and belongs to the technical field of press-fitting.

Background

The gear pump usually adopts an axial clearance automatic compensation mode to improve the working pressure, and the principle is that the end surface clearance is compensated with the working pressure in a floating way by installing a floating side plate. The floating side plate is in an 8 shape, and two inner holes are respectively provided with a shaft sleeve for supporting a gear shaft rotating at a high speed. The floating side plate assembly is a key part of the high-pressure gear pump, and in order to ensure the floatability of the floating side plate and reduce the abrasion of the floating side plate, the outer surface of the floating side plate and the inner surface of the shaft sleeve are required to have high coaxiality precision. The shaft sleeve and the floating side plate are in interference fit and need to be assembled in a press fitting mode. The existing press-fitting technology needs a press machine and a special press-fitting die, the early cost investment is high, the work efficiency of products is low, the floating side plate after press-fitting can not meet the coaxiality precision requirement, and unqualified products are easy to generate.

Disclosure of Invention

The invention aims to provide a manual gear pump shaft sleeve press-fitting device aiming at the technical problems in the prior art, the device can simultaneously press-fit two shaft sleeves at one time, has high assembly precision, simple operation and low labor intensity, greatly shortens the assembly time and has high working efficiency.

The invention further aims to provide a gear pump shaft sleeve press-fitting method.

The purpose of the invention can be achieved by adopting the following technical scheme:

a manual gear pump shaft sleeve press-mounting device comprises a rack, a hydraulic driving mechanism, an upper pressing plate, a lower pressing plate, two pressing shafts, positioning pieces and elastic pieces, wherein the rack comprises a base, two stand columns and an upper top plate;

the two ends of each upright column are respectively fixedly connected with the upper top plate and the base, each upright column is connected with the upper pressure plate in a sliding mode, the hydraulic driving mechanism is fixed on the upper top plate and is connected with the upper pressure plate, the upper pressure plate is fixedly connected with the lower pressure plate, the lower pressure plate is fixedly connected with the pressure shaft, each elastic piece is sleeved on the corresponding upright column, and the two ends of each elastic piece are respectively fixedly connected with the upper pressure plate and the base.

Further, every pressure axle includes spigot surface, working face and directional boss, spigot surface, working face and directional boss from the bottom up set gradually, the through-hole has been seted up to the base on every spigot surface of pressing the axle corresponds the position, the spigot surface cooperates with the through-hole that corresponds to the direction of motion of guide pressure axle, the cooperation of working face and axle sleeve hole face, directional boss cooperates with the axle sleeve recess to confirm axle sleeve circumference position.

Furthermore, the hydraulic driving mechanism comprises a pump body and a push rod, wherein the pump body is fixed on the upper top plate and is connected with the upper pressure plate through the push rod.

Furthermore, hydraulic drive mechanism still includes handle and oil return switch, handle and pump body swing joint for hand pump body is in order to provide thrust, the oil return switch is installed in the side of the pump body, is used for uninstallation pump body thrust to make the last item rise.

Furthermore, the hydraulic driving mechanism further comprises a pressing plate, and the pressing plate is fixed on the push rod.

Further, still include first fixing bolt and second fixing bolt, first fixing bolt and second fixing bolt are two, and two first fixing bolts set up for bilateral symmetry for fixed top board and holding down plate, two second fixing bolts set up for front and back symmetry for fixed holding down plate and pressure shaft.

Furthermore, the limiting device further comprises two limiting blocks, the two limiting blocks are arranged in a bilateral symmetry mode, the limiting blocks and the stand columns are in one-to-one correspondence, and each limiting block is fixed on the base and matched with the corresponding stand column to limit the lowest moving position of the upper pressure plate.

The novel upper pressing plate is characterized by further comprising four cover plates, wherein two cover plates are symmetrically arranged front and back, the other two cover plates are symmetrically arranged left and right, and each cover plate is fixed at the position, close to the middle, of the upper end of the upper pressing plate.

Furthermore, the positioning pieces are positioning pins, grooves are formed in the corresponding positions of the positioning pins of the base, and each positioning pin is installed in the corresponding groove and matched with the unloading groove of the floating side plate to position the floating side plate.

The other purpose of the invention can be achieved by adopting the following technical scheme:

the utility model provides a gear pump axle sleeve pressure equipment method, realizes based on above-mentioned manual gear pump axle sleeve pressure equipment device, the method includes:

placing a floating side plate to be pressed on a base, and matching an unloading groove of the floating side plate with a positioning piece;

unloading the thrust of the pump body of the hydraulic driving mechanism, and pushing the pressing shaft upwards to the top end under the action of the elastic piece;

sleeving the two shaft sleeves on the two pressing shafts respectively, and rotating the shaft sleeves to enable the grooves of the shaft sleeves to be matched with the directional bosses of the pressing shafts;

the pump body of the hydraulic driving mechanism is pressed by hand to provide thrust, the upper pressure plate drives the pressure shaft downwards to press the shaft sleeve into the floating side plate under the action of the push rod until the upper pressure plate reaches a limiting position, and the floating side plate and the shaft sleeve form a floating side plate assembly together;

the thrust of the pump body of the hydraulic driving mechanism is unloaded, the pressing shaft is pushed out of the floating side plate assembly upwards under the action of the elastic piece, and the floating side plate assembly is taken down to complete the one-time press mounting process.

Compared with the prior art, the invention has the following beneficial effects:

1. the device can press and mount two shaft sleeves of a floating side plate in the gear pump at the same time, the floating side plate is placed on the base for positioning, the two shaft sleeves are respectively sleeved on the two pressing shafts, the upper pressing plate is pressed through the hydraulic driving mechanism to drive the pressing shafts to press the shaft sleeves into the floating side plate, the upper pressing plate stops when reaching a limiting position, one-time press mounting is completed, the operation is simple, the labor intensity is low, the assembly time is greatly shortened, the working efficiency is high, the structure is simple, the production and the manufacture are simple, the cost is low, and the device is suitable for small-batch assembly production in the initial stage of.

2. The press shaft of the device comprises a guide surface, a working surface and an orientation boss, wherein the guide surface is matched with the through hole of the base to guide the movement direction of the press shaft, the working surface is matched with the inner hole surface of the shaft sleeve, the orientation boss is matched with the groove of the shaft sleeve to determine the circumferential direction of the shaft sleeve, and the guide surface of the press shaft is matched for guiding and the orientation boss for orientation through the guide of the upright post, so that the guide precision is high, the coaxiality precision of the press shaft sleeve is high, and the product quality is greatly improved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.

Fig. 1 is a schematic front view structure diagram of a manual gear pump shaft sleeve press-fitting device according to an embodiment of the present invention.

Fig. 2 is a schematic front sectional view of a manual gear pump shaft sleeve press-fitting device according to an embodiment of the present invention.

Fig. 3 is a schematic side sectional view of a manual gear pump shaft sleeve press-fitting device according to an embodiment of the present invention.

Fig. 4 is a schematic structural diagram of a pressing shaft in the manual gear pump shaft sleeve pressing device according to the embodiment of the invention.

Fig. 5 is a schematic structural view of a shaft sleeve in the gear pump according to the embodiment of the present invention.

Fig. 6 is a schematic structural diagram of a floating side plate in a gear pump according to an embodiment of the present invention.

The device comprises an upper pressing plate 1, a lower pressing plate 2, a pressing shaft 3, a guiding surface 301, a working surface 302, a directional boss 303, a positioning piece 4, an elastic piece 5, a base 6, a column 7, an upper top plate 8, a first fixing bolt 9, a second fixing bolt 10, a pump body 11, a push rod 12, a handle 13, an oil return switch 14, a pressing plate 15, a shaft sleeve 16, a shaft sleeve 1601, a shaft sleeve groove 1602, a shaft sleeve inner hole surface 17, a floating side plate 1701, an unloading groove 1701, a limiting block 18, a cover plate 19 and a hexagon bolt 20.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer and more complete, the technical solutions in the embodiments of the present invention will be described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some embodiments of the present invention, but not all embodiments, and all other embodiments obtained by a person of ordinary skill in the art without creative efforts based on the embodiments of the present invention belong to the protection scope of the present invention.

Example (b):

as shown in fig. 1-3, this embodiment provides a manual formula gear pump axle sleeve pressure equipment device, the device includes the frame, hydraulic drive mechanism, top board 1, holding down plate 2, last axle 3, setting element 4 and elastic component 5, the frame includes base 6, stand 7 and top board 8, last axle 3, setting element 4, elastic component 5 and stand 7 are two, two last axles 3 are the front and back symmetry setting, two setting elements 4, two elastic components 5 and two stands 7 are the bilateral symmetry setting.

The two ends of each upright post 7 are respectively fixedly connected with the upper top plate 8 and the base 6, specifically, the upper end of the left upright post 7 is fixedly connected with the left side of the upper top plate 8, the lower end of the left upright post 7 is fixedly connected with the left side of the base 6, the upper end of the right upright post 7 is fixedly connected with the right side of the upper top plate 8, and the lower end of the right upright post 7 is fixedly connected with the right side of the base 6; each upright post 7 is connected with the upper pressure plate 1 in a sliding way.

Top board 1 and 2 fixed connection of holding down plate, holding down

plate

2 and 3 fixed connection of pressure axle, can see from the picture, top board 1 sets up along the left and right sides direction, holding down plate 2 sets up along the fore-and-aft direction, in order to realize top board 1 and 2 fixed connection of holding down plate, holding down

plate

2 and 3 fixed connection of pressure axle, the manual formula gear pump axle sleeve pressure equipment device of this embodiment still includes first fixing bolt 9 and second fixing bolt 10, two first fixing bolt 9 set up for bilateral symmetry, be used for fixed top board 1 and holding down plate 2, two second fixing bolt 10 set up for longitudinal symmetry, be used for fixed holding down plate 2 and pressure axle 3.

The hydraulic driving mechanism is fixed on the upper top plate 8, particularly fixed in the middle of the upper top plate 8, connected with the upper pressure plate 1 and used for driving the upper pressure plate 1 to press downwards, and the lower pressure plate 2 and the pressure shaft 3 also press downwards along with the upper pressure plate 1; further, the hydraulic driving mechanism comprises a pump body 11 and a push rod 12, the pump body 11 is fixed on the upper top plate 8 and is connected with the upper pressure plate 1 through the push rod 12, thrust is provided through the pump body 11, and the upper pressure plate 1 is pressed downwards under the action of the push rod 12.

In order to operate the hydraulic driving mechanism conveniently, the hydraulic driving mechanism of the embodiment further comprises a handle 13 and an oil return switch 14, the handle 13 is movably connected with the pump body 11 and used for manually pressing the pump body 11 to provide thrust, and the oil return switch 14 is installed on the side surface of the pump body 11 and used for unloading the thrust of the pump body 11 to lift the pressure shaft 3; in order to better push the upper pressure plate 1 to press downwards, the hydraulic driving mechanism of the embodiment further comprises a pressure plate 15, and the pressure plate 15 is fixed on the push rod 12.

As shown in fig. 1 to 5, a bushing recess 1601 and a bushing inner hole 1602 are provided on the bushing 16, each pressing shaft 3 of this embodiment includes a guide surface 301, a working surface 302 and a directional boss 303, the guide surface 301, the working surface 302 and the directional boss 303 are sequentially arranged from bottom to top, the base 1 is provided with a through hole at a position corresponding to the guide surface 301 of each pressing shaft 3, that is, the base 1 is provided with two through holes, the guide surface 301 is matched with the corresponding through hole to guide the moving direction of the pressing shaft 3, prevent the downward process of the pressing shaft 3 from deviating, improve the press-fitting precision, the working surface 302 is matched with the bushing inner hole 1602, the directional boss 303 is matched with the bushing recess 1601 to determine the circumferential direction of the bushing 16.

As shown in fig. 1 to 3 and 6, the floating side plate 17 is provided with an unloading groove 1701, the positioning element 4 of this embodiment is a positioning pin, the base 1 is provided with a groove at a corresponding position of each positioning pin, that is, the base 1 is provided with two grooves, and each positioning pin is installed in a corresponding groove and is matched with the unloading groove 1701 of the floating side plate 17 to position the floating side plate 17.

Elastic component 5 is the relation of one-to-one with

stand

7, 5 covers of every elastic component are established on corresponding stand 7, the both ends of every elastic component 5 respectively with top board 1, 6 fixed connection on the base, when hydraulic drive mechanism stopped driving, under the effect of elastic component 5, can make the last push away of last axle 3, specifically, the elastic component 5 of this embodiment is the spring, the upper end of the spring on the left side and the left side fixed connection of top board 1, the lower extreme of the spring on the left side and the left side fixed connection of base 6, the upper end of the spring on the right side and the right side fixed connection of top board 1, the lower extreme of the spring on the right side and the right side fixed connection of base 6.

In order to limit the upper pressure plate 1, the manual gear pump shaft sleeve press-fitting device of the embodiment further comprises two limiting blocks 18, the two limiting blocks 18 are arranged in a bilateral symmetry manner, the limiting blocks 18 correspond to the upright columns 7 one by one, each limiting block 18 is fixed on the base and matched with the corresponding upright column 7 to limit the lowest moving position of the upper pressure plate, and specifically, each limiting block 18 is provided with a groove so as to be matched with the corresponding upright column 7.

The manual gear pump shaft sleeve press-fitting device of the embodiment further comprises four cover plates 19, wherein the two cover plates 19 are symmetrically arranged front and back, the other two cover plates 19 are symmetrically arranged left and right, each cover plate 19 is fixed at the position, close to the middle part, of the upper end of the upper pressure plate 1, and specifically, each cover plate 19 is fixed at the position, close to the middle part, of the upper end of the upper pressure plate 1 through a hexagon bolt 20.

In order to conveniently record the pressing position of the shaft sleeve 16, the upright post 7 of the embodiment is marked with scale marks; in order to fix the whole manual type gear pump shaft sleeve press-fitting device, U-shaped mounting holes are further formed in two sides of the base 6 of the embodiment.

As shown in fig. 1 to 6, the manual gear pump shaft sleeve press-fitting device of the present embodiment specifically includes the following working processes:

s1, since the two positioning members 4 are installed in the two grooves of the base 6, the floating side plate to be press-fitted is directly placed on the base 6, and the unloading slots 1701 of the floating side plate 17 are engaged with the positioning members 4.

And S2, opening the oil return switch 14, unloading the thrust of the pump body 11, pushing the pressing shaft 3 upwards to the top under the action of the elastic piece 5, and then closing the oil return switch 14.

S3, sleeving the two shaft sleeves 16 on the two pressing shafts 3 respectively, and rotating the shaft sleeves 16 to enable the shaft sleeve grooves 1601 to be matched with the directional bosses 303 of the pressing shafts 3.

S4, the pump body 11 is pressed by hand through the handle 13 to provide thrust, under the action of the push rod 12, the upper press plate 1 drives the press shaft 3 downwards to press the shaft sleeve 16 into the floating side plate 17 until the upper press plate 1 touches the limit block 18, namely the upper press plate 1 reaches the limit position, so that the floating side plate 17 and the shaft sleeve 16 form a floating side plate assembly together.

And S5, opening the oil return switch 14, unloading the thrust of the pump body 11, pushing the floating side plate assembly upwards by the pressing shaft 3 under the action of the elastic piece 5, and taking down the floating side plate assembly to complete one-time press fitting process.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or given otherwise, the terms "disposed," "mounted," and "connected" are to be construed broadly, e.g., as being fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In conclusion, the device can press and mount two shaft sleeves of a floating side plate in the gear pump at the same time, the floating side plate is placed on the base to be positioned, the two shaft sleeves are respectively sleeved on the two pressing shafts, the upper pressing plate is pressed through the hydraulic driving mechanism to drive the pressing shafts to press the shaft sleeves into the floating side plate, the upper pressing plate stops when reaching a limiting position, one-time press mounting is completed, the operation is simple, the labor intensity is low, the assembly time is greatly shortened, the working efficiency is high, the structure is simple, the production and the manufacture are simple, the cost is low, and the device is suitable for small-batch assembly production in the initial stage.

The above description is only for the preferred embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art can substitute or change the technical solution and the inventive concept of the present invention within the scope of the present invention.

Claims

1. A manual gear pump shaft sleeve pressing device is characterized in that it comprises a frame, a hydraulic drive mechanism, an upper pressing plate, a lower pressing plate, a pressing shaft, a positioning member and an elastic member, and the frame comprises a base, a column and an upper plate. For the top plate, there are two pressing shafts, positioning members, elastic members and uprights. The two pressing shafts are arranged symmetrically in the front and rear. for a one-to-one correspondence;

Both ends of each column are fixedly connected to the upper top plate and the base respectively, and each column is slidably connected to the upper pressure plate, the hydraulic drive mechanism is fixed on the upper ceiling plate, and is connected to the upper pressure plate, and the upper pressure plate is fixed to the lower pressure plate The lower pressing plate is fixedly connected with the pressing shaft, each elastic piece is sleeved on the corresponding upright column, and the two ends of each elastic piece are respectively fixedly connected with the upper pressing plate and the base.

2. The manual gear pump shaft sleeve pressing device according to claim 1, wherein each pressing shaft comprises a guide surface, a working surface and an orientation boss, and the guide surface, the working surface and the orientation boss are arranged from below Arranged in order from the top, the base is provided with a through hole at the corresponding position of the guide surface of each pressing shaft, and the guide surface cooperates with the corresponding through hole to guide the movement direction of the pressing shaft. The hole and the surface are matched, and the directional boss is matched with the groove of the shaft sleeve to determine the circumferential orientation of the shaft sleeve.

3. The manual gear pump shaft sleeve pressing device according to claim 1, wherein the hydraulic drive mechanism comprises a pump body and a push rod, the pump body is fixed on the upper top plate, and is connected with the push rod through the push rod. Upper platen connection.

4. The manual gear pump bushing press-fitting device according to claim 3, wherein the hydraulic drive mechanism further comprises a handle and an oil return switch, and the handle is movably connected to the pump body and is used for the hand pump The oil return switch is installed on the side of the pump body to unload the thrust of the pump body to raise the pressure shaft.

5 . The manual gear pump shaft sleeve pressing device according to claim 3 , wherein the hydraulic drive mechanism further comprises a pressing plate, and the pressing plate is fixed on the push rod. 6 .

6. The manual gear pump shaft sleeve press-fitting device according to any one of claims 1-5, characterized in that, further comprising a first fixing pin and a second fixing pin, the first fixing pin and the second fixing pin There are two pins. The two first fixing pins are symmetrically arranged on the left and right for fixing the upper pressing plate and the lower pressing plate, and the two second fixing pins are symmetrically arranged in the front and rear, and are used for fixing the lower pressing plate and the pressing shaft.

7. The manual gear pump shaft sleeve press-fitting device according to any one of claims 1-5, characterized in that it further comprises limit blocks, the limit blocks are two, and the two limit blocks are left and right Symmetrically arranged, and the limit blocks are in a one-to-one relationship with the uprights. Each limiter block is fixed on the base and cooperates with the corresponding uprights to limit the lowest moving position of the upper pressure plate.

8. The manual gear pump shaft sleeve press-fitting device according to any one of claims 1-5, characterized in that it further comprises cover plates, and the number of the cover plates is four, wherein two cover plates are symmetrically arranged front and rear , and the other two cover plates are arranged symmetrically on the left and right, and each cover plate is fixed at the position of the upper end of the upper platen close to the middle.

9 . The manual gear pump shaft sleeve pressing device according to claim 1 , wherein the positioning member is a positioning pin, and the base is provided with a corresponding position of each positioning pin. 10 . grooves, each positioning pin is installed in the corresponding groove and cooperates with the unloading groove of the floating side plate to locate the floating side plate.

10. A method for press-fitting a gear pump shaft sleeve, implemented based on the manual gear pump shaft sleeve press-fitting device according to any one of claims 1-9, wherein the method comprises:

Place the floating side plate to be pressed on the base, so that the unloading groove of the floating side plate is matched with the positioning piece;

Unload the thrust of the pump body of the hydraulic drive mechanism, and under the action of the elastic member, the pressing shaft is pushed up to the top;

Put the two bushings on the two pressing shafts respectively, and turn the bushings so that the grooves of the bushings fit with the directional bosses of the pressing shafts;

The pump body of the hydraulic drive mechanism is pressed by hand to provide thrust. Under the action of the push rod, the upper pressure plate is driven downward to drive the pressure shaft to press the shaft sleeve into the floating side plate until the upper pressure plate reaches the limit, so that the floating side plate and the shaft sleeve together form the floating side panel assembly;

Unload the thrust of the pump body of the hydraulic drive mechanism, and under the action of the elastic member, the pressing shaft pushes the floating side plate assembly upward, and the floating side plate assembly is removed to complete a press-fitting process.