CN210676606U - Pressing mechanism and axle housing correcting die - Google Patents

Abstract

This scheme provides a mechanism and axle housing correction mould pushes down for eliminate the problem of the clearance difficulty of axle housing and beaded finish among the solution prior art. This scheme provides a mechanism pushes down, includes: the mounting base is provided with a support lug, the support lug is arranged on the mounting base in a floating mode from the lower side through an elastic assembly, the support lug can enter the mounting base, the lower end of the support lug can extend out of the lower end of the mounting base, and the elastic assembly has elastic force for keeping the lower end of the support lug extending out of the lower end of the mounting base; and the lower pressing piece is installed at the lower end of the support lug in a rotating and inclined mode through the support shaft, and when the support lug extends into the installation seat, the horizontal state enables the upward relative displacement of the lower pressing piece to be blocked by the lower end of the installation seat. The clearance between the axle housing center hole and the reinforcing ring can be eliminated.

Description

Pressing mechanism and axle housing correcting die

Technical Field

This scheme relates to a pressure equipment and axle housing manufacture equipment field especially relate to a mechanism and axle housing correction mould push down.

Background

In the production of the automobile rear axle housing, after a reinforcing ring is welded in a central large hole, the gap between the reinforcing ring and the shell is eliminated, and a mold for manually taking and placing a lower pressing piece is used at present.

The rotation of the manual lower pressing piece is used for correcting the separation of the lower die and the upper die and the lower die, and during operation, a processing object (an axle housing) is firstly placed on the lower die, and then the lower pressing piece is placed in a large hole in the center of the axle housing (note: the middle part of the axle housing is in a structure of an upper opening, a lower opening and a large belly). The upper die descends to press on the lower pressing piece, and the force is transmitted through the lower pressing piece to press the gap between the shell and the reinforcing ring.

The correcting die for manually putting and taking the lower pressing piece needs to put the lower pressing piece into and take the large hole in the center of the axle housing, so that great danger is brought to operators; a plurality of people are wounded by the mould to the hands and the arms; the weight of the pressing piece is about 10 kilograms, and the labor intensity is high; the manual placing and taking consumes the operation time and has low efficiency.

Disclosure of Invention

In view of the above shortcomings in the prior art, an object of the present scheme is to provide a pressing mechanism and an axle housing correction mold, which are used for solving the problem that a pressing member must be manually taken and placed in the prior art.

To achieve the above and other related objects, the present invention provides a pressing mechanism, comprising:

a mounting seat is arranged on the base plate,

the support lug is arranged on the mounting seat in a floating mode from the lower side through an elastic assembly, the upper end of the support lug can extend into the mounting seat, the lower end of the support lug can extend out of the lower end of the mounting seat, and the elastic assembly has elastic force for keeping the lower end of the support lug extending out of the lower end of the mounting seat;

and the lower pressing piece is installed at the lower end of the support lug in a rotating and inclined mode through the support shaft, and when the support lug extends into the installation seat, the horizontal state enables the upward relative displacement of the lower pressing piece to be blocked by the lower end of the installation seat.

Optionally, the mounting seat comprises a vertical cylinder and a top block fixed on the vertical cylinder, the lower end of the vertical cylinder is of an open structure, and a vertical groove is formed in the top block;

the supporting lugs are provided with strip-shaped holes, the upper ends of the supporting lugs are mounted in the vertical grooves through guide shafts, the guide shafts are fixed on the top blocks and transversely penetrate through the strip-shaped holes, and the supporting lugs can vertically slide in the vertical grooves;

the elastic assembly comprises at least one first spring;

the top block is provided with at least one vertical first accommodating counter bore, the first accommodating counter bore is used for accommodating one end of the first spring, and the other end of the first spring is connected to the support lug.

Optionally, the support lug can swing in the vertical groove, the elastic assembly further has an elastic force for keeping the support lug in an inclined state, and the inclination directions of the pressing member and the elastic assembly are the same.

Optionally, the lower pressing piece is a lower inclined end below the supporting shaft, the lower pressing piece is an upper inclined end above the supporting shaft, and the length of the upper inclined end is smaller than that of the lower inclined end or equal to that of the lower inclined end.

Optionally, the elastic assembly comprises at least one second spring,

the top block is provided with at least one transverse second containing counter bore, the second containing counter bore is used for containing one end of a second spring, and the other end of the second spring is connected to the support lug.

Optionally, a handle is arranged on the mounting seat and used for driving the mounting seat to rotate.

Optionally, the upper end and the lower end of the pressing piece are both provided with inclined planes, and when the pressing piece is located at a horizontal position, the inclined planes can be partially in contact fit with the lower end opening of the vertical cylinder.

An axle housing correction die is used for reducing the fit clearance between a reinforcing ring and an axle housing center hole and comprises any one of the pressing mechanisms, and the length of the pressing piece is larger than the diameter of the axle housing center hole;

the die comprises an upper die holder and a lower die holder, wherein the mounting seat is mounted at the lower end of the upper die holder;

still include to install through elastic construction floating support plate on the die holder, elastic construction has the maintenance floating support plate upwards protrusion in the elastic force of die holder up end, the lower pressure member can press floating support plate and can let floating support plate is absorbed in completely in the die holder, floating support plate can pass the beaded finish, not with when floating support plate contact the lower pressure member with the vertical projection of journal stirrup is covered by the diameter of axle housing centre bore.

Optionally, a first step hole is formed in the lower die base, the floating support plate is arranged in a large hole of the first step hole, and the elastic structure is located between the floating support plate and the step surface of the lower die base.

Optionally, the elastic structure includes a plurality of third springs, the upper ends of the third springs are connected to the floating support plate, the lower ends of the third springs are connected to the step surface of the lower die base, and the third springs are arranged in the circumferential direction of the first step hole at intervals.

The method has the following beneficial effects:

stretch out the setting of mount pad with the journal stirrup through the elastic component effect, and will push down the setting that the piece slope rotated the installation, make down the piece and can gradually change into the horizontality when contacting the obstacle down the casting piece, down the casting piece can stretch into the structure inner chamber that the mouth is little and the belly is big, it is flat including the inner chamber flattening down the casting piece, for example, when it is used for reducing the fit clearance of beaded finish and axle housing centre bore, it can stretch into in the axle housing, then carry out the action of pushing down to the axle housing, thereby the problem that needs manual getting of push down to put among the prior art has been solved well.

Drawings

FIG. 1 shows a schematic view of an axle housing.

Fig. 2 shows a schematic view of the pressing mechanism (with the support lug vertically arranged) according to the present embodiment.

Fig. 3 shows a schematic view of the engagement of the vertically arranged lugs and the elastic component of the present solution.

Fig. 4 is a schematic view of the pressing mechanism (the support lug is obliquely arranged) according to the present embodiment.

Fig. 5 shows a schematic view of a viewing angle of the engagement of the obliquely arranged lugs and the elastic element according to the present solution.

Fig. 6 is a schematic view showing another perspective of the engagement of the obliquely arranged lugs and the elastic member of the present solution.

Fig. 7 shows a schematic view of the mounting base of the present solution.

Fig. 8 shows a schematic view of an axle housing correcting die of the present solution.

Fig. 9 is a perspective view showing the matching of the lower die holder and the floating support plate according to the scheme.

Figure 10 shows a cross-sectional view of the lower die holder and floating carrier assembly of the present embodiment.

Description of the element reference numerals

1 axle housing center hole

2 reinforcing ring

3 mounting seat

4 support lug

5 push-down piece

31 vertical cylinder

32 top block

41 strip-shaped holes

320 vertical groove

61 first spring

321 first receiving counterbore

43 Cross member

431 first column

62 second spring

322 second receiving counterbore

42 guide shaft

421 transverse through hole

51 supporting shaft

52 lower beveled end

53 upper inclined end

33 handle

54 inclined plane

7 upper die base

8 lower die holder

10 floating support plate

9 third spring

81 first stepped hole

11 sleeve

111 flange structure

101 second stepped bore

12 guide frame

13 mounting notch

Detailed Description

Other advantages and capabilities of the present invention will be readily apparent to those skilled in the art from the disclosure herein.

Please refer to fig. 1 to 10. It should be understood that the structures, ratios, sizes, and the like shown in the drawings attached to the present specification are only used for matching with the disclosure of the specification, so as to be understood and read by those skilled in the art, and are not used for limiting the conditions that the present disclosure can be implemented, so that the present disclosure has no technical essence, and any modification of the structures, changes of the ratio relationships, or adjustment of the sizes, should fall within the scope that the present disclosure can cover without affecting the efficacy and the achievable purpose of the present disclosure. In addition, the terms "upper", "lower", "left", "right", "middle" and "one" used in the present specification are for clarity of description, and are not used to limit the scope of the present invention, and the relative relationship between the terms may be changed or adjusted without substantial technical change.

The following examples are for illustrative purposes only. The various embodiments may be combined, and are not limited to what is presented in the following single embodiment.

Please refer to fig. 1, an axle housing includes two axle housing centre bores 1 of coaxial setting, the horizontal size of axle housing centre bore 1 is less than the inner chamber size of axle housing, it is the structure that the mouth is little and the belly is big, install reinforcement ring 2 respectively on two axle housing centre bores 1, reinforcement ring 2 is packed into in axle housing centre bore 1 from the outside of axle housing centre bore 1, 2 partly protrusion in axle housing surface of reinforcement ring this moment, partly enter into in axle housing centre bore 1, there is the clearance between reinforcement ring 2 and the axle housing, in fig. 1, only draw and installed a reinforcement ring 2, reinforcement ring 2 is not installed to another axle housing centre bore 1.

In one embodiment, referring to fig. 2 to 3 and 7, the pressing mechanism includes: the mounting structure comprises a mounting base 3, a support lug 4 and a lower pressing piece 5, wherein the support lug 4 is arranged on the mounting base 3 in a floating mode through an elastic assembly, the upper end of the support lug 4 can extend into the mounting base 3 from the lower surface of the mounting base 3, the lower end of the support lug 4 can extend out of the lower end of the mounting base 3, and the elastic assembly has elastic force for keeping the lower end of the support lug 4 extending out of the lower end of the mounting base 3; lower pressure member 5 passes through the back shaft and rotates and the slope is installed the lower extreme of journal stirrup 4, works as when journal stirrup 4 stretches into mount pad 3 in, the horizontality the ascending relative displacement of lower pressure member 5 can by the lower extreme of mount pad 3 blocks. When the pressing mechanism with the structure is used, the installation base 3 applies downward pressure to the elastic assembly, the elastic assembly applies downward pressure to the support lug 4, the elastic assembly is compressed and deformed at the moment, the support lug 4 gradually enters the installation base 3, the pressing piece 5 is arranged at the lower end of the support lug 4, the pressing piece 5 also moves upwards relative to the installation base 3, the pressing piece 5 gradually approaches the lower end of the installation base 3, when the pressing piece 5 moves to the lower end of the installation base 3, the pressing piece 5 is blocked by the lower end of the installation base 3, the relative positions of the pressing piece 5 and the installation base 3 are fixed, then the pressing piece 5 can be directly extruded by the installation base 3, then the pressing piece 5 can press objects below the pressing piece 5, and due to the inclined arrangement of the pressing piece 5, the pressing piece 5 can extend into a structural cavity with a small mouth and a large belly, and due to the rotary installation of the pressing piece 5, the holding-down member 5 can be flat in the inner cavity, for example, when it is used for reducing the fit clearance of beaded finish 2 and axle housing centre bore 1, it can stretch into in the axle housing, carries out the action of pushing down to the axle housing.

In one embodiment, referring to fig. 2 to 3 and 7, the mounting base 3 includes a vertical tube 31 and a top block 32 integrally formed or fixedly connected with an upper portion of the vertical tube 31, a lower end of the vertical tube 31 is of an open structure, and a vertical groove 320 is formed on the top block 32; when an external force is applied downwards through the top block 32 or the vertical cylinder 31, because the vertical cylinder 31 and the top block 32 are fixed, the vertical cylinder 31 and the top block 32 can move downwards synchronously, the support lugs 4 are vertically provided with strip-shaped holes 41, the upper ends of the support lugs 4 are installed in the vertical grooves 320 through guide shafts 42, the guide shafts 42 are fixed on the top blocks and transversely penetrate through the strip-shaped holes 41, the support lugs 4 can vertically slide in the vertical grooves 320, in particular to refer to fig. 6, the vertical cylinder and the top block are provided with transverse through holes 421, and the guide shafts 42 penetrate through the transverse through holes 421; when kicking block 32 drive journal stirrup 4 downstream, journal stirrup 4 receives reverse effect after, and journal stirrup 4 overcomes elastic component's elastic force, and upward motion takes place for kicking block 32 in the length range of bar hole 41 for journal stirrup 4, and guiding shaft 42 and the cooperation of bar hole 41 have played the guide effect this moment, down the piece 5 through the back shaft 51 rotate and the slope install the lower extreme of journal stirrup 4. In an initial state, the support lug 4 extends out of the vertical barrel 31 downwards under the action of elastic force, when the lower pressing piece 5 bears upward pressure, the lower pressing piece 5 transmits the force to the support lug 4, the support lug 4 is transmitted to the elastic assembly again, the elastic assembly is compressed and deformed, the support lug 4 gradually moves upwards relative to the vertical barrel 31, finally, the lower pressing piece 5 is located at a horizontal position, the length of the lower pressing piece 5 is larger than the inner diameter of the vertical barrel 31, so that the upward relative displacement of the lower pressing piece 5 is blocked, and the vertical barrel 31 can apply pressure to the lower pressing piece 5.

Referring to fig. 3, 5 and 6, the specific embodiment of the vertical floating of the elastic component to the support lug 4 may be: the elastic component comprises at least one first spring 61, and the first spring 61 can be one, or a plurality of springs arranged in parallel, or a plurality of springs arranged in series, or a plurality of springs arranged in parallel or in series; be equipped with at least one vertical first counter bore 321 that holds on top block 32, first counter bore 321 that holds is used for holding the one end of first spring 61, the other end of first spring 61 is connected on journal stirrup 4, in fig. 6, can see that first spring 61 has two, and the lower extreme of journal stirrup 4 is equipped with a crossbeam 43, sets up a first stand 431 on the crossbeam 43, and first spring 61 overlaps on first stand 431, can effectually avoid the slippage of first spring 61, and in fig. 7, the first counter bore 321 that holds that corresponds also has two, and a first spring 61 has corresponded a first counter bore 321 that holds promptly.

In one embodiment, referring to fig. 4 to 7, the elastic component further has an elastic force for keeping the support lug 4 in a tilted state, and the direction of tilt of the pressing member 5 is the same as that of the support lug 4. Optionally, the elastic assembly includes at least one second spring 62, the number of the second springs 62 may be one or multiple, in fig. 4 to 7, there are two second springs 62, at least one transverse second accommodating counterbore 322 is provided on the top block 32, and an opening of the second accommodating counterbore 322 is communicated with the first accommodating counterbore 321. In fig. 4 to 7, there are two second receiving counterbores 322, the second receiving counterbores 322 are used for receiving one end of the second spring 62, the other end of the second spring 62 is welded to the support lug 4, or a second upright post is arranged on the support lug 4, and then the second spring 62 is sleeved on the second upright post. The second spring 62 applies a transverse force to the support lug 4, so that the support lug 4 is in an inclined state, and inclines in the same direction as the pressing piece 5, after the lower end of the pressing piece 5 enters the inner cavity, the pressing piece 5 continues to move downwards, then the pressing piece 5 is blocked, the height of the lower end of the pressing piece 5 is unchanged, and only displacement occurs in the horizontal direction, the upper end of the pressing piece 5 starts to rotate downwards, due to the inclined arrangement of the support lug 4, the upper end of the pressing piece 5 is not easy to interfere with the edge of the opening of the vertical cylinder in the downward rotating process, the pressing piece 5 can be longer, and when the inner cavity is in the horizontal state, the bearing area of the pressing piece 5 is larger, for example, when the pressing piece is used for correcting the axle housing and the reinforcing ring 2, the stress areas of the pressing piece 5 and the reinforcing ring 2 are larger, so that the reinforcing ring 2 can be effectively protected, and damage. The lower part of the support shaft 51 of the lower pressing member 5 is a lower inclined end 52, the upper part of the support shaft 51 of the lower pressing member 5 is an upper inclined end 53, and the length of the upper inclined end 53 is preferably smaller than that of the lower inclined end 52. When the length of the lower inclined end 52 is greater than that of the lower inclined end 52, at this time, the upper inclined end 53 and the lower inclined end 52 of the lower pressing member 5 can be set to be block-shaped structures with the same material, and the same material can enable the upper inclined end 53 and the lower inclined end 52 to be set to be symmetrical structures, so that the manufacturing is convenient, and because the lower inclined end 52 is longer than the upper inclined end 53, the weight of the lower inclined end 52 is heavier, so that the inclination of the lower inclined end 52 and the upper inclined end is realized, the upper inclined end 53 and the lower inclined end 52 can also be made of different materials, and the final purpose is only to ensure that the weight of the upper inclined end 53 is smaller than that of the lower inclined end 52, the lower inclined end 52 of the lower pressing member 5 can enter the inner cavity first, and because the length of the upper inclined end 53 is shorter when rotating; the lower pressing member 5 is in an initial inclined state by its own weight, and in order to ensure the relative stability of the inclined state, the distance from the lower inclined end to the supporting shaft 51 may be greater than the distance from the upper inclined end to the supporting shaft 51, and when the distances from the upper inclined end 53 and the lower inclined end 52 to the supporting shaft 51 are the same, the weight of the lower inclined end 52 is preferably greater than that of the upper inclined end 53, specifically, a material with a higher density is embedded in the lower inclined end 52, so that the lower inclined end 52 can be inclined by gravity.

In one embodiment, referring to fig. 2, 4, and 8, a handle 33 is disposed on the mounting base 3, and the handle 33 is used for driving the mounting base 3 to rotate. Rotation is realized to mount pad 3, the corresponding needs rotate mount pad 3 and install on a pressure equipment, for example when being used as axle housing correction mould, rotate the 3 upper ends of mount pad and install on the upper die base, perhaps fix mount pad 3 on the upper die base, then rotate it again and install on pressure equipment, once push down the completion back, operating handle 33 lets mount pad 3 select certain angle, repeated completion pushes down the action, thereby realize that many places compress tightly in grades, effectively reduce the clearance of axle housing and beaded finish 2.

In one embodiment, referring to fig. 2, 4 and 8, the upper end and the lower end of the lower pressing member 5 are both provided with inclined surfaces 54, and when the lower pressing member 5 is in the horizontal position, the inclined surfaces 54 can partially contact and cooperate with the lower opening of the vertical cylinder 31. At this time, the two inclined surfaces 54 form an eight-shaped structure, the lower pressing piece 5 is matched with the lower end opening of the vertical cylinder 31, and when the lower pressing piece 5 is gradually changed from the inclined state to the horizontal state, the lower pressing piece 5 can be gradually straightened from the eccentric state due to the existence of the inclined surfaces 54.

Referring to fig. 8 to 10, an axle housing correction mold for reducing a fit clearance between a reinforcement ring 2 and an axle housing center hole 1 includes the pressing mechanism described in any one or combination of the above embodiments, and the length of the pressing member 5 is greater than the diameter of the axle housing center hole 1, so that the pressing member 5 can be clamped in an inner cavity of an axle housing; the axle housing correction die further comprises an upper die base 7 and a lower die base 8, the mounting base 3 is installed at the lower end of the upper die base 7, the axle housing correction die further comprises a floating supporting plate 10 installed on the lower die base 8 through an elastic structure, the elastic structure keeps the floating supporting plate 10 protruding upwards from the upper end face of the lower die base 8, the lower pressing piece 5 can press the floating supporting plate 10 and can enable the floating supporting plate 10 to be sunk into the lower die base 8, the floating supporting plate 10 can penetrate through the reinforcing ring 2, the vertical projection of the lower pressing piece 5 and the support lugs 4 when the floating supporting plate 10 is not in contact with is covered by the diameter of the axle housing center hole 1, the lower pressing piece 5 can partially enter the axle housing inner cavity in advance under the condition that the length of the lower pressing piece 5 is larger than the axle housing center hole 1, and the reinforcing ring 2 can be penetrated through the floating supporting plate 10, make unsteady layer board 10 can follow and push up the holding down plate in axle housing centre bore 1, when holding down 5 and unsteady layer board 10 contact, holding down 5 gradual change is the horizontality, vertical section of thick bamboo 31 is direct earlier exerts pressure to holding down 5, holding down 5 represses on the layer board 10 that floats, unsteady layer board 10 pressurized is absorbed gradually in die holder 8, hold down 5 at last by vertical section of thick bamboo 31 and axle housing, vertical section of thick bamboo 31 is exerted pressure the back by upper die base 7, holding down 5 is direct to exert pressure downwards the axle housing inner wall, beaded finish 2 is supported by the up end of die holder 8 this moment, form the butt-top from top to bottom, the clearance of axle housing and beaded finish 2 is reduced.

Referring to fig. 9 to 10, a first step hole 81 is formed in the lower die base 8, the floating support plate 10 is disposed in a large hole of the first step hole 81, and the elastic structure is located between the floating support plate 10 and a step surface of the lower die base 8. The elastic structure comprises a plurality of third springs 9, the upper ends of the third springs 9 are connected with the floating supporting plate 10, the lower ends of the third springs 9 are connected with the step surface of the lower die base 8, and the third springs 9 are arranged in the annular direction of the first step hole 81 at intervals. For more reliable installation of the third spring 9, a counter bore structure for one end of the third spring 9 may be provided on the step surface of the lower die base 8, and another counter bore structure for accommodating the other end of the third spring 9 may be provided on the lower surface of the floating plate 10.

Referring to fig. 9 to 10, a sleeve 11 is further arranged in the first stepped hole 81, a flange structure 111 is arranged at the upper end of the sleeve 11, the floating support plate 10 is also provided with a second stepped hole 101, the sleeve 11 penetrates through the small hole of the floating support plate 10, the lower end of the sleeve 11 is matched with the small hole of the first stepped hole 81, a flange on the sleeve 11 is sunk into the large hole of the floating support plate 10 and is fixed with the floating support plate 10 through bolts, the sleeve 11 can play a role in slag discharge on one hand, a part of debris is usually generated in the axle housing, and on the other hand, the sleeve 11 is matched with the small hole of the first stepped hole 81 and can play a role in vertical guiding for vertical movement of the floating support plate.

Referring to fig. 8, in order to guide the vertical displacement of the mounting base 3, a guide frame 12 may be mounted on the lower die base 8, the inner side of the guide frame 12 is matched with the outer side of the vertical cylinder 31 to realize guiding, and the frame is configured to avoid interference with the lower pressing member 5, so that the lower pressing member 5 can pass through the interval of the guide frame 12 when gradually changing from a tilted state to a horizontal state.

Referring to fig. 9, in order to fix the lower die base 8, the upper die base 7 and other devices, mounting structures may be provided on the lower die base 8 and the upper die base 7, and the specific mounting structures may be a plurality of mounting notches 13 for cooperating with bolts provided on the upper die base 7 and the lower die base 8.

To sum up, this scheme is through the setting that the earmuff 4 stretches out vertical section of thick bamboo 31 of elastic component effect to and will push down 5 slopes to rotate the setting of installation, make and push down 5 casting die 5 and can gradually change into the horizontality when contacting the obstacle, push down 5 and can stretch into the structure inner chamber that the mouth is little and the belly is big, push down 5 at the inner chamber exhibition flat, for example, when it is used for reducing the fit clearance of beaded finish 2 and axle housing centre bore 1, it can stretch into in the axle housing, carry out the action of pushing down to the axle housing. Therefore, the scheme effectively overcomes various defects in the prior art and has high industrial utilization value.

The above embodiments are merely illustrative of the principles and effects of the present solution and are not intended to limit the present solution. Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes be made by those skilled in the art without departing from the spirit and technical spirit of the present disclosure and be covered by the claims of the present disclosure.

Claims (10)

1. A hold-down mechanism, comprising:

a mounting seat is arranged on the base plate,

the support lug is arranged on the mounting seat in a floating mode from the lower side through an elastic assembly, the upper end of the support lug can extend into the mounting seat, the lower end of the support lug can extend out of the lower end of the mounting seat, and the elastic assembly has elastic force for keeping the lower end of the support lug extending out of the lower end of the mounting seat;

and the lower pressing piece is installed at the lower end of the support lug in a rotating and inclined mode through the support shaft, and when the support lug extends into the installation seat, the horizontal state enables the upward relative displacement of the lower pressing piece to be blocked by the lower end of the installation seat.

2. The hold-down mechanism according to claim 1, wherein: the mounting seat comprises a vertical cylinder and a top block fixed on the vertical cylinder, the lower end of the vertical cylinder is of an open structure, and a vertical groove is formed in the top block;

the supporting lugs are provided with strip-shaped holes, the upper ends of the supporting lugs are mounted in the vertical grooves through guide shafts, the guide shafts are fixed on the top blocks and transversely penetrate through the strip-shaped holes, and the supporting lugs can vertically slide in the vertical grooves;

the elastic assembly comprises at least one first spring;

the top block is provided with at least one vertical first accommodating counter bore, the first accommodating counter bore is used for accommodating one end of a first spring, the other end of the first spring is connected to the support lug, and the first spring has the function of keeping the lower end of the support lug extending out of the elastic force of the lower end of the mounting seat.

3. The hold-down mechanism according to claim 2, wherein: the support lug can swing in the vertical groove, the elastic assembly also has elastic force for keeping the support lug in an inclined state, and the inclination directions of the pressing piece and the support lug are the same.

4. A hold-down mechanism according to claim 3, wherein: the lower pressing piece is arranged below the supporting shaft and is an inclined lower end, the lower pressing piece is arranged above the supporting shaft and is an inclined upper end, and the length of the inclined upper end is smaller than that of the inclined lower end.

5. The hold-down mechanism according to any one of claims 2 to 4, wherein: the resilient assembly comprises at least one second spring,

the top block is provided with at least one transverse second containing counter bore, the second containing counter bore is used for containing one end of a second spring, and the other end of the second spring is connected to the support lug.

6. The hold-down mechanism according to any one of claims 1 to 4, wherein: the handle is arranged on the mounting seat and used for driving the mounting seat to rotate.

7. The hold-down mechanism according to any one of claims 2 to 4, wherein: the upper end and the lower end of the lower pressing piece are both provided with inclined planes, and when the lower pressing piece is in a horizontal position, the inclined planes can be partially in contact fit with the lower end opening of the vertical barrel.

8. The utility model provides a mould is rectified to axle housing, mould is rectified to axle housing is used for dwindling the fit clearance of beaded finish and axle housing centre bore, its characterized in that:

the axle housing correction die comprises the pressing mechanism of any one of claims 1 to 7, and the length of the pressing piece is larger than the diameter of the axle housing center hole;

the die comprises an upper die holder and a lower die holder, wherein the mounting seat is mounted at the lower end of the upper die holder;

still include to install through elastic construction floating support plate on the die holder, elastic construction has the maintenance floating support plate upwards protrusion in the elastic force of die holder up end, the lower pressure piece can press floating support plate and can let floating support plate is absorbed in the die holder, floating support plate can pass the beaded finish, not with during the contact of floating support plate the lower pressure piece with the vertical projection of journal stirrup is covered by the diameter of axle housing centre bore.

9. The axle housing correction mold of claim 8, wherein: the lower die base is provided with a first step hole, the floating support plate is arranged in a large hole of the first step hole, and the elastic structure is located between the floating support plate and the step surface of the lower die base.

10. The axle housing correction mold of claim 9, wherein: the elastic structure comprises a plurality of third springs, the upper ends of the third springs are connected with the floating supporting plate, the lower ends of the third springs are connected with the step surface of the lower die holder, and the third springs are arranged in the annular direction of the first step hole at intervals.

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