CN215093204U

CN215093204U - Assembling and positioning device for shell and bushing

Info

Publication number: CN215093204U
Application number: CN202121726513.2U
Authority: CN
Inventors: 沈钱; 张正阳
Original assignee: Ningbo Xinyue Electronic Technology Co ltd
Current assignee: Ningbo Xinyue Electronic Technology Co ltd
Priority date: 2021-07-27
Filing date: 2021-07-27
Publication date: 2021-12-10
Anticipated expiration: 2031-07-27

Abstract

The utility model discloses a positioning device for assembling of casing and bush, characteristics are: including the bottom plate, be provided with the circular constant head tank that corresponds with the casing locating hole on the bottom plate, the vertical hollow guide post that is provided with in the circular constant head tank, be provided with locating pin and elastic component from top to bottom in the guide post, the top face of guide post constitutes the casing holding surface, be provided with the bush holding surface on the upper end lateral wall of locating pin, the elastic component is greater than the thickness of casing with the interval of casing holding surface when natural state, establish casing and bush cover outside the locating pin, exert down force after the locating pin, thereby it is interior with the bush impressing to make locating pin downstream through the compression effect of elastic component, the advantage is: the utility model provides a reliable integral type positioning device of casing and bush of simple structure, positioning accuracy is higher, and is higher to the latitude tolerance of the casing locating hole position precision of moulding plastics, does not need artifical regular point to examine the regulation structure, improves production efficiency, reduces the product extravagant.

Description

Assembling and positioning device for shell and bushing

Technical Field

The utility model relates to an assembly fixture field especially relates to an assembly positioning device of casing and bush.

Background

In the production of some hydraulic products, such as bushings, it is necessary to press the hydraulic product into an injection molded housing by a press. Because the bush and the casing need to closely cooperate, and need accurately be fixed a position the downthehole to the casing, therefore the precision to the position requires highly.

At present, similar assembling and positioning mechanisms in the industry often adopt a split structure, namely, the shell and the bushing are respectively positioned, for example, the shell is positioned under a press, the bushing is positioned above the press, and then the bushing is pressed into the shell by pressing down. However, the split positioning structure still has the following defects: on one hand, the concentricity requirement on the upper and lower positioning mechanisms is high, so that poor positioning accuracy and positioning deviation are easily caused, the injection molding shell is easy to deform, so that a positioning hole on the shell can deviate, the positioning accuracy requirement on a product positioning hole by the split type structure positioning device is high, the positioning deviation can cause that some injection molding shells cannot be placed into the positioning device, a bushing cannot be pressed into the injection molding shell, or the injection molding shell is forcedly pressed into a product to cause damage, so that the yield is low, the product is wasted and the like; on the other hand, split type positioning mechanism structure is comparatively complicated, needs the artifical concentricity of regularly checking casing positioner and bush positioner, wastes time and energy.

Disclosure of Invention

In order to solve the deficiencies existing in the prior art, the utility model provides a simple structure is reliable casing and assembly positioning device of bush based on the characteristic of its casing and bush integral type location, makes its positioning accuracy higher, and is higher to the latitude degree of moulding plastics casing locating hole position accuracy, does not need artifical periodic spot inspection to adjust the structure, improves production efficiency greatly, and it is extravagant to reduce the product.

The utility model provides a technical scheme that above-mentioned technical problem adopted does: an assembly positioning device for a shell and a bush comprises a bottom plate, wherein circular positioning grooves with the number and the positions corresponding to the positioning holes of the shell are arranged on the bottom plate, a hollow guide post is vertically arranged in each circular positioning groove, the guide post is internally and coaxially provided with a positioning pin and an elastic piece from top to bottom, the top end surface of the guide post forms a shell supporting surface matched with the bottom end of the shell, the outer side wall of the upper end of the positioning pin is provided with a bushing supporting surface which is used for being matched with the bottom end of the bushing, when the elastic piece is in a natural state, the distance between the supporting surface of the bushing and the supporting surface of the shell is larger than the thickness of the shell, the shell and the bushing are sleeved outside the positioning pin, after downward pressure is applied to the positioning pin, the positioning pin moves downwards through the compression action of the elastic piece so as to press the bushing into the shell.

In some embodiments, the elastic member is a spring, the bottom of the spring abuts against the bottom of the circular positioning slot, and the top of the spring abuts against the bottom of the positioning pin. Therefore, the positioning pin can float up and down through being matched with the spring, and the positioning pin is compressed into the guide column while being pressed into the bushing.

In some embodiments, the circular positioning slot is composed of two types: the diameter of the first circular positioning groove is consistent with that of the guide column, the guide column is fixed in the first circular positioning groove, the diameter of the second circular positioning groove is slightly larger than that of the guide column, and the guide column can float around in the second circular positioning groove. From this, for fixed reference through a guide post, keep motionless, remaining two guide posts can float to all around, can solve and lead to the problem of locating hole skew when injection moulding product produces little deformation, reduce the position required precision to the product locating hole, and the suitability is wider, reduces the product waste.

In some embodiments, the fit clearance between the second circular positioning slot and the guide post is 0-0.5 mm. Therefore, the guide post in the second circular positioning groove can float around in the gap range, so that the positioning device is suitable for positioning more injection molding products, and the size does not influence the requirement on positioning precision.

In some embodiments, the outer side wall of the positioning pin and the inner side wall of the guide post are circumferentially provided with a blocking surface for preventing the positioning pin from continuously moving upwards. Therefore, the positioning pin can be prevented from being dislocated under the action of the resilience force of the elastic piece.

In some embodiments, the diameter of the lower end of the guide post is greater than the diameter of the upper end of the guide post. Therefore, the strength of the guide column can be increased, and the structural stability during assembly work is improved.

Compared with the prior art, the utility model has the advantages of:

(1) an integrated assembling and positioning device for a shell and a bushing is provided. Outside the locating hole cover to the locating pin of casing earlier, the bottom and the casing holding surface butt of casing, the lateral wall of locating pin this moment constitutes the locating surface of casing on vertical direction, this locating surface when the bush impresses with the inside wall sliding fit of guide post. And sleeving the bushing on the positioning pin, abutting the bottom of the bushing against a supporting surface of the bushing to keep the position of the shell stationary, applying downward pressure on the bushing by a pressure head of a press, pressing the bushing into the shell by downward movement of the positioning pin, enabling the positioning pin to float up and down, and compressing the positioning pin into the guide column while pressing the bushing into the bushing.

(2) Through a guide post for fixed benchmark, other two guide posts can float to all around, can solve and produce the problem that the micro deformation leads to the locating hole skew at injection moulding product.

(3) The integrated shell and the assembly positioning device of the bushing have the advantages that two products can be positioned on the same positioning pin, the process of debugging and centering of a separated structure is avoided, the positioning precision is high, the tolerance of the positioning hole position precision of the injection molding shell is high, manual periodical point inspection is not needed for adjusting the structure, the production efficiency is greatly improved, and the product waste is reduced.

Drawings

Fig. 1 is a schematic structural diagram of an embodiment of an assembly positioning device for a housing and a bushing according to the present invention;

fig. 2 is a schematic structural view of the assembling and positioning device for the housing and the bush of the present invention in use;

FIG. 3 is a front view of the positioning device for assembling a housing and a bushing according to the present invention;

fig. 4 is an exploded view of the positioning device for assembling the housing and the bushing according to the present invention.

The device comprises a bottom plate 1, a blocking surface 2, a guide post 3, a positioning pin 4, an elastic piece 5, a shell supporting surface 6, a shell positioning surface 61, a lining supporting surface 7, a lining positioning surface 71, a first circular positioning groove 8, a second circular positioning groove 9, a shell 10, a shell positioning hole 11, a lining 20, a press 30 and a press head 31.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples, but the present invention is not limited thereto.

Example one

As shown in the figure, the assembling and positioning device for the shell 10 and the bush 20 comprises a bottom plate 1, wherein circular positioning grooves with the number and the positions corresponding to shell positioning holes 11 are arranged on the bottom plate 1, a hollow guide post 3 is vertically arranged in each circular positioning groove, a positioning pin 4 and an elastic piece 5 are coaxially arranged in each guide post 3 from top to bottom, a shell supporting surface 6 matched with the bottom end of the shell 10 is formed on the top end surface of each guide post 3, a bush supporting surface 7 matched with the bottom end of the bush 20 is arranged on the outer side wall of the upper end of each positioning pin 4, when the elastic piece 5 is in a natural state, the distance between the bushing supporting surface 7 and the shell supporting surface 6 is larger than the thickness of the shell 10, the shell 10 and the bushing 20 are sleeved outside the positioning pin 4 in sequence, a downward force is applied to the tip end surface of the pilot pin 4, and the pilot pin 4 is moved downward by the compression action of the elastic member 5 to press the bush 20 into the housing 10.

When assembled into the housing, the outer side wall of the dowel pin 4 between the bushing-bearing surface 7 and the housing-bearing surface 6 forms a housing-locating surface 61, which housing-locating surface 61 is in sliding engagement with the inner side wall of the guide post 3 when the bushing is pressed in. When the bushing is installed, the outer side wall of the locating pin 4 above the bushing seating surface forms a bushing locating surface 71, which presses the bushing seating surface 7 and the bushing thereon into the housing during assembly.

The top end of the positioning pin 4 is higher than the top end of the guide post 3 in a natural state, the elastic piece 5 is compressed by applying downward pressure on the positioning pin 4, so that the top of the positioning pin 4 is pressed into the guide post 3, the top end face of the guide post 3 forms a shell positioning face 6, the shell positioning face 6 is used for positioning the position of the shell positioning hole 11, and a lining positioning face 7 used for positioning the position of the lining 20 is circumferentially arranged on the outer side wall of the top end of the positioning pin 4.

Example two

The present embodiment provides an assembling and positioning device for a housing and a bushing, which defines a specific structure of an elastic member on the basis of the first embodiment. In this embodiment, the elastic member 5 is a spring, the bottom of the spring abuts against the bottom of the circular positioning groove 2, and the top of the spring abuts against the bottom of the positioning pin 4. Therefore, the positioning pin can float up and down through being matched with the spring, and the positioning pin is compressed into the guide column while being pressed into the bushing.

EXAMPLE III

The present embodiment provides an assembling and positioning device for a housing and a bushing, which defines a specific structure of a circular positioning slot on the basis of the first embodiment. In this embodiment, the circular positioning groove is composed of the following two types: the guide column comprises a first circular positioning groove 8 and a second circular positioning groove 9, the diameter of the first circular positioning groove 8 is consistent with that of the guide column 3, the guide column 3 is fixed in the first circular positioning groove 8, the diameter of the second circular positioning groove 9 is slightly larger than that of the guide column 3, and the guide column 3 can float around in the second circular positioning groove 9. From this, for fixed reference through a guide post, keep motionless, remaining two guide posts can float to all around, can solve and lead to the problem of locating hole skew when injection moulding product produces little deformation, reduce the position required precision to the product locating hole, and the suitability is wider, reduces the product waste.

The fit clearance between the second circular positioning groove 9 and the guide post 3 is 0-0.5mm, preferably 0.3 mm. The guide post in the second circular positioning groove can float around in the clearance range.

Example four

The embodiment provides an assembling and positioning device of a shell and a bush, which is further supplemented with the rest structures on the basis of the embodiment. In this embodiment, the outer side wall of the positioning pin 4 and the inner side wall of the guide post 3 are circumferentially provided with blocking surfaces 2 for preventing the positioning pin 4 from continuously moving upwards. Thereby avoiding the dislocation of the positioning pin under the action of the resilience force of the elastic piece.

The diameter of the lower end of the guide post 3 is larger than that of the upper end of the guide post 3. Therefore, the strength of the guide column can be increased, and the structural stability during assembly work is improved.

The utility model discloses an assembly positioning device of casing and bush is when the assembly, successively put into locating pin 4 with casing 10 and bush 20 on, two locating surfaces of locating pin, be used for respectively with the guide post between unsteady direction, location casing, positioning bush. In order to prevent the product from deforming and positioning the hole to deviate, only one guide column is taken as a fixed reference, and the rest two guide columns can float to the periphery, so that the two positioning pins are driven to float. The ram 31 on the press 30 presses the bushing 20 into the housing 10, and the dowel pin floats up and down, compressing the dowel pin while pressing into the bushing.

The structure of integral type makes two kinds of products can fix a position on same locating pin, has avoided the process of disconnect-type structure debugging centering, and positioning accuracy is higher, and is higher to the latitude degree of moulding plastics casing locating hole position accuracy, does not need artifical periodic point to examine the regulation structure, improves production efficiency greatly, and it is extravagant to reduce the product.

It should be noted that the above-mentioned embodiments are only preferred embodiments of the present invention, and the scope of the present invention is not limited thereto, and the present invention can also be modified in materials and structures, or replaced by technical equivalents. Therefore, all structural equivalents which may be made by applying the present invention to the specification and drawings, or by applying them directly or indirectly to other related technical fields, are intended to be encompassed by the present invention.

Claims

1. The utility model provides an assembly positioning device of casing and bush, its characterized in that, includes the bottom plate, the bottom plate on be provided with quantity and position all with the corresponding round constant head tank of casing locating hole, every round constant head tank in vertically be provided with hollow guide post, the guide post in from top to bottom coaxial be provided with locating pin and elastic component, the top terminal surface of guide post constitute be used for with the bottom complex casing holding surface of casing, the upper end lateral wall of locating pin on be provided with be used for with the bottom complex bush holding surface of bush, elastic component when natural state, bush holding surface with the interval of casing holding surface be greater than the thickness of casing, the casing with the bush cover establish the locating pin outside, to the locating pin exert down force after, thereby through the compression of elastic component make the locating pin downstream the bush impress in the casing.

2. The device as claimed in claim 1, wherein the resilient member is a spring, a bottom of the spring abuts a bottom of the circular positioning groove, and a top of the spring abuts a bottom of the positioning pin.

3. The assembling and positioning device for the shell and the bush according to claim 1, wherein the circular positioning slot is composed of the following two types: the diameter of the first circular positioning groove is consistent with that of the guide column, the guide column is fixed in the first circular positioning groove, the diameter of the second circular positioning groove is slightly larger than that of the guide column, and the guide column can float around in the second circular positioning groove.

4. The assembling and positioning device for the shell and the bush according to claim 3, wherein the fit clearance between the second circular positioning groove and the guide post is 0-0.5 mm.

5. The assembling and positioning device for the shell and the bushing of claim 1, wherein the outer side wall of the positioning pin and the inner side wall of the guide post are circumferentially provided with stop surfaces for preventing the positioning pin from continuously moving upwards.

6. The assembling and positioning device for the shell and the bushing of claim 1, wherein the diameter of the lower end of the guide post is larger than the diameter of the upper end of the guide post.