CN112975342B

CN112975342B - Exhaust gas recirculation valve assembly lining press mounting device

Info

Publication number: CN112975342B
Application number: CN202110207710.1A
Authority: CN
Inventors: 吴少威; 陈聪; 张欢欢; 张云彦
Original assignee: Heshi Industrial Technology Co ltd
Current assignee: Heshi Industrial Technology Co ltd
Priority date: 2021-02-25
Filing date: 2021-02-25
Publication date: 2022-03-29
Anticipated expiration: 2041-02-25
Also published as: CN112975342A

Abstract

The invention provides a bushing press-fitting device of an exhaust gas recirculation valve assembly, which comprises an outer expansion positioning tool, a valve plate pre-positioning tool, a through bushing press-fitting assembly and a blind bushing press-fitting assembly, wherein the valve plate pre-positioning tool is arranged on the outer expansion positioning tool, and the maximum width of the valve plate pre-positioning tool is smaller than the effective installation width of the outer expansion positioning tool; the through bush press-fitting assembly is positioned on the first side of the tool assembly and comprises a pressing rod, and the pressing rod can move above the positioning tool by expanding outwards; the blind bush press fitting assembly is located on the second side of the tooling assembly, the blind bush press fitting assembly comprises a push rod, a placing seat and a second press fitting driving device, the placing seat is located between the outward-expansion positioning tooling and the second press fitting driving device, a placing groove is formed in the placing seat, the second press fitting driving device drives the push rod to pass through the placing groove to move above the outward-expansion positioning tooling, and the push rod and the press rod are correspondingly arranged. The invention not only has convenient press mounting and high press mounting efficiency, but also can be compatible with various valve bodies with different models.

Description

Exhaust gas recirculation valve assembly lining press mounting device

Technical Field

The invention relates to the field of production equipment of exhaust gas recirculation valves, in particular to a bushing press-fitting device of an exhaust gas recirculation valve assembly.

Background

An EGR valve, also called an exhaust gas recirculation valve, is an electromechanical integrated device mounted on a diesel engine for controlling the amount of exhaust gas recirculation fed back to an intake system. When the EGR valve assembly is assembled, a valve plate needs to be placed in the valve body, then the through bushing and the blind bushing are respectively pressed from two sides of the valve body, two ends of the valve plate are respectively supported on the through bushing and the blind bushing, and then the cylindrical pin is placed from the outer side of the valve body, so that the two bushings are fixedly connected with the valve body.

The traditional press fitting method comprises the following steps: horizontally placing the valve body to enable the bushing mounting hole on one side to be upward, and vertically and downwards pressing and mounting a first bushing through a pressing and mounting mechanism; then, the valve body is turned over by 180 degrees, so that the mounting hole of the bushing on the other side faces upwards, and a second bushing is vertically pressed downwards through a pressing mechanism; at the moment, the valve plate in the valve body is clamped and fixed by the bushings on the two sides; and then, the valve body is turned over by 90 degrees, so that the pin mounting holes on the two sides are upward, the cylindrical pin is pressed and mounted through the pin pressing mechanism, and the bushing is fixed by the cylindrical pin. According to the traditional press mounting method, the valve body needs to be turned over for many times, and after the valve body is turned over every time, the valve body needs to be positioned again by using the positioning tool, so that the operation is complex, the operation is very inconvenient, and the press mounting efficiency is not improved easily.

After the bushing is pressed and installed, the tightness of the EGR valve needs to be detected. The existing detection method is to install the EGR valve on a corresponding detection device, introduce compressed air into the EGR valve through the detection device, test pressure loss after holding pressure for a set time, and judge whether the leakage amount of the EGR valve is in a standard range according to the pressure loss. The detection method consumes longer time, and is not beneficial to saving time and improving production efficiency.

Disclosure of Invention

The invention aims to provide the exhaust gas recirculation valve assembly bushing press-fitting device which is convenient to press-fit, high in press-fitting efficiency and compatible with various valve bodies of different types.

In order to achieve the purpose, the bushing press-fitting device for the exhaust gas recirculation valve assembly comprises a tool assembly, a through bushing press-fitting assembly and a blind bushing press-fitting assembly, wherein the tool assembly comprises an outward expansion positioning tool and a valve plate pre-positioning tool; the through bush press-fitting assembly is positioned on the first side of the tool assembly and comprises a pressing rod and a first press-fitting driving device, and the first press-fitting driving device drives the pressing rod to move above the positioning tool in an outward expanding mode; the blind bush press fitting assembly is located on the second side of the tooling assembly, the blind bush press fitting assembly comprises a push rod, a placing seat and a second press fitting driving device, the placing seat is located between the outward-expansion positioning tooling and the second press fitting driving device, a placing groove is formed in the placing seat, the second press fitting driving device drives the push rod to pass through the placing groove to move above the outward-expansion positioning tooling, and the push rod and the press rod are correspondingly arranged.

According to the scheme, the outward expansion positioning tool is arranged for fixing the valve body from the inside of the valve body, and the valve block pre-positioning tool is arranged for positioning the valve block, so that the valve block is pre-placed in the valve body according to a preset angle, the valve body and the valve block can be conveniently installed, and the assembly efficiency is improved; by arranging the outward expansion positioning tool, the valve bodies of different types are positioned from the interior of the valve body due to the fact that the internal structures of the valve bodies of different types are basically the same, compatibility with the valve bodies of different types is facilitated, and the outward expansion positioning tool has the advantage of being high in compatibility; by arranging the pressure lever, the through bush is sleeved on the pressure lever, and the first press-fitting driving device is utilized to drive the pressure lever to drive the through bush to be installed in the through bush installation hole of the valve body; the blind bushing mounting structure has the advantages that the placing groove is used for placing the blind bushing, the second press-fitting driving device is used for driving the push rod to push the blind bushing to be mounted in the blind bushing mounting hole of the valve body, and press-fitting of the through bushing and the blind bushing can be carried out simultaneously only by once positioning, so that press-fitting efficiency and press-fitting quality are improved.

The further scheme is that the outer expansion positioning tool comprises a lifting driving device, a lifting wedge block, an outer expansion sleeve and an outer expansion clamping assembly, the outer expansion sleeve is sleeved on the upper portion of the lifting wedge block, the outer expansion clamping assembly is sleeved on the outer side of the outer expansion sleeve, the lifting driving device drives the lifting wedge block to move along the axial direction of the outer expansion sleeve, the diameter of the outer expansion sleeve is variable, and the outer expansion sleeve drives the outer expansion clamping assembly to move in the horizontal direction.

According to the scheme, the lifting wedge block and the outward-expanding sleeve are arranged, the inclined surface which is folded downwards is arranged on the outer peripheral wall of the lifting wedge block, and when the lifting wedge block descends, the outward-expanding sleeve is expanded outwards to drive the outward-expanding clamping assembly to expand outwards so as to perform the actions of fixing and positioning the workpiece.

The further scheme is that the outer expansion sleeve comprises an elastic ring and a plurality of arc-shaped outer expansion blocks, the arc-shaped outer expansion blocks are enclosed to form a ring, the elastic ring is sleeved on the peripheries of the arc-shaped outer expansion blocks, an arc-shaped groove is formed in the peripheral wall of the arc-shaped outer expansion block along the circumferential direction of the peripheral wall, and the elastic ring is located in the arc-shaped groove.

By the scheme, the elastic ring is arranged, when the acting force of the lifting wedge block on the outward expansion sleeve disappears, the elastic ring automatically contracts, so that the diameter of the outward expansion sleeve is restored to an initial state, and the outward expansion clamping assembly releases a workpiece.

The further scheme is that, the clamping component that rises outward includes a plurality of fixed holders and a plurality of activity holders, fixed holder and activity holder are along circumference interval arrangement and enclose and form the ring, the radial movement of the clamping component that rises outward can be followed to the activity holder, in the footpath of the clamping component that rises outward, the internal perisporium of activity holder inwards extrudees the internal perisporium of fixed holder, the piece that rises outward of arc corresponds the setting with the activity holder, the periphery wall of the piece that rises outward of arc and the internal perisporium of activity holder adjoin.

The further scheme is that the valve block pre-positioning tool comprises a bottom plate, at least two protruding seats and at least two positioning columns, the two protruding seats are arranged on the bottom plate along the radial direction of the bottom plate, the top surface of each protruding seat is located in the same plane, the positioning columns are arranged on the protruding seats and extend upwards along the vertical direction, and in the horizontal direction, the distance is preset at intervals between the two positioning columns.

By the scheme, the valve block can be arranged on the valve block pre-positioning tool according to the preset angle by arranging the at least two positioning columns and being matched and connected with the through hole in the valve block.

The blind bushing press-fitting assembly further comprises a buffer assembly, wherein two ends of the buffer assembly are respectively and fixedly connected with the push rod and the placing seat, and the buffer assembly and the placing seat can move together along with the push rod; buffering subassembly is including buffering mount pad, buffering guide post and elastic component, and the buffering mount pad sets up on the push rod, and the buffering guide post telescopically sets up on the buffering mount pad and along the axial extension of push rod, places the seat and sets up the one end of keeping away from the buffering mount pad at the buffering guide post, and the elastic component cover is established on the buffering guide post, and elastic component elasticity butt is placing between seat and the buffering mount pad, and the push rod can place the seat relatively and remove.

According to the scheme, by arranging the buffer assembly, when the push rod drives the placing seat to move towards the valve body and contact with the outer peripheral wall of the valve body, the placing seat stops moving, and then the push rod moves forwards relative to the placing seat, so that the push rod presses the blind bush on the placing seat into the blind bush mounting hole of the valve body, and the press-fitting function is realized; the buffer assembly further plays a role in buffering, avoids placing the seat and the valve body to collide, and is favorable for guaranteeing the accuracy of the positioning position of the valve body and avoiding the surface of the valve body from forming scratches or deformation.

The further scheme is that one side of each of the through bushing press-fitting assembly and the blind bushing press-fitting assembly is respectively provided with a bushing feeding assembly, the bushing feeding assembly comprises an X-direction driving device, a fixed seat, a Y-direction driving device and a feeding clamping head, the X-direction driving device drives the fixed seat to move along the X direction, the Y-direction driving device is arranged on the fixed seat, and the Y-direction driving device drives the feeding clamping head to move along the Y direction to the tool assembly.

According to the scheme, the bushing feeding assembly is arranged, so that automatic feeding is facilitated, and the automatic feeding device has the advantage of high automation operation degree.

The further scheme is that the exhaust gas recirculation valve assembly bushing press-fitting device further comprises a press-down positioning component, the press-down positioning component comprises a vertical mounting frame, a joint mounting seat, a press head and a press-down driving device, the vertical mounting frame is arranged on one side of the tool assembly, the joint mounting seat and the press-down driving device are both arranged on the vertical mounting frame, the press head is detachably connected onto the joint mounting seat, the press head is located above the tool assembly, the press-down driving device drives the joint mounting seat and the press head to move towards the tool assembly, and a positioning groove is formed in the press head downwards.

According to the scheme, the lower pressure head is arranged, the positioning groove matched with the valve body is formed in the lower pressure head, when the valve body is arranged on the tool assembly, the valve body is pressed through the lower pressure head, the valve body is prevented from being subjected to position deviation in the press mounting process, the press mounting quality is improved, and the press mounting effect is guaranteed.

The further scheme is that the exhaust gas recirculation valve assembly bushing press fitting device further comprises a misplacement detection assembly, a through bushing on-site detection assembly and a plurality of workpiece on-site detection assemblies, wherein the misplacement detection assembly is arranged in the push rod and emits detection light to the placement groove along the axial direction of the push rod, the through bushing on-site detection assembly is positioned on one side of the through bushing press fitting assembly and emits detection light to the press rod, and the workpieces on-site detection assemblies are arranged around the tool assembly and respectively emit detection light towards the direction of the tool assembly.

According to the scheme, the misplacement detection assembly is arranged and used for detecting whether the blind bushing is in place or not and whether the blind bushing is misplaced or not; the through bush in-place detection assembly is arranged and used for detecting the through bush in-place feeding, so that the press rod can conveniently carry out press mounting operation; the valve body, the valve plate and the lining are respectively used for detecting whether the valve body, the valve plate and the lining are assembled in place or not by arranging a plurality of workpiece in-place detection assemblies; through setting up above-mentioned determine module, be favorable to realizing automated operation, reduce the error probability, improve pressure equipment efficiency.

The further scheme is that the exhaust gas recirculation valve assembly bushing press-fitting device further comprises a workbench, a material temporary storage component and a clearance amount detection device, wherein the material temporary storage component, the clearance amount detection device, a tooling component, a through bushing press-fitting component and a blind bushing press-fitting component are all arranged on the workbench, the material temporary storage component comprises a material rack and a plurality of material boxes, and the material boxes are arranged on the material rack.

Drawings

Fig. 1 is an overall structural view of the embodiment of the present invention with the protective cover removed.

Fig. 2 is a block diagram of an embodiment of the present invention.

Fig. 3 is an enlarged view at a in fig. 2.

Figure 4 is a top view of a tooling assembly and a bushing press-fitting assembly in an embodiment of the present invention.

Fig. 5 is a sectional view of B-B in fig. 4.

Fig. 6 is an enlarged view at C in fig. 5.

Fig. 7 is a structural view of a cushion assembly in an embodiment of the present invention.

Fig. 8 is an exploded view of a tooling assembly and a workpiece in an embodiment of the present invention.

Fig. 9 is a rear view of a tooling assembly and workpiece in an embodiment of the present invention.

Fig. 10 is a cross-sectional view D-D in fig. 9.

Fig. 11 is a structural view of a lower ram in an embodiment of the present invention.

Fig. 12 is a plan view of a gap amount detecting device in an embodiment of the present invention.

Fig. 13 is a cross-sectional view of E-E in fig. 12.

Fig. 14 is an enlarged view at F in fig. 13.

The invention is further explained with reference to the drawings and the embodiments.

Detailed Description

Referring to fig. 1 to 3, the bushing press-fitting device for the egr valve assembly provided by the present invention includes a workbench 1, a protective cover (not shown), a tooling assembly 2, a through bushing press-fitting assembly 3, a blind bushing press-fitting assembly 4, a press-down positioning assembly 5, a gap amount detection device 6, and two temporary workpiece storage assemblies 7. The protection casing encloses to close around workstation 1, and frock subassembly 2, logical bush pressure equipment subassembly 3, blind bush pressure equipment subassembly 4, push down locating component 5, clearance amount detection device 6 and two material spare assemblies of keeping in 7 all are located the protection casing. The material temporary storage assembly 7 comprises a material rack and two material boxes, wherein the material boxes are arranged on the material rack, and the two material boxes are arranged up and down. For convenience of explanation, the left-right direction of the table 1 is defined as the X direction, the front-rear direction of the table 1 is defined as the Y direction, and the vertical direction is defined as the Z direction.

The tooling assembly 2 is located in the middle of the workbench 1, the through bushing press-fitting assembly 3 and the blind bushing press-fitting assembly 4 are arranged on two sides of the tooling assembly 2 along the X direction, the press-down positioning assembly 5 is located on the rear side of the tooling assembly 2Y direction, the two temporary storage assemblies 7 are arranged on two sides of the press-down positioning assembly 5 along the X direction, and the clearance amount detection device 6 is located on the front side of the tooling assembly 2, preferably on the front side of the blind bushing press-fitting assembly 4.

With reference to fig. 6 and 8, the EGR valve 8 to which the present embodiment is applied to press-fitting includes a valve body 81, a valve plate 82, a through bush 83, a blind bush 84, and two cylindrical pins 85, the valve body 81 is provided with a first cavity 812, a through bush mounting hole, a blind bush mounting hole, and two pin holes 811, the through bush mounting hole and the blind bush mounting hole are coaxially disposed and are both communicated with the first cavity 812, one of the pin holes 811 penetrates through the bush mounting hole from an outer side wall of the valve body 81, the other pin hole 811 penetrates through the blind bush mounting hole from an outer side wall of the valve body 81, the two pin holes 811 are arranged in parallel, and an extending direction of the pin holes 811 intersects an extending direction of the blind bush mounting hole. The valve plate 82 is rotatably disposed in the first cavity 812, and both ends of the valve plate 82 face the through bush mounting hole and the blind bush mounting hole, respectively. The valve sheet 82 is provided with a second cavity 822 and four through holes 821, and the four through holes 821 are divided into two groups. Each set of through holes 821 is symmetrically disposed about a center line of the second cavity 822, and each through hole 821 is communicated with the second cavity 822. The through bush 83 is pressed in the through bush mounting hole, the outer peripheral wall of the through bush 83 is provided with a first annular groove, and a cylindrical pin 85 is arranged in the corresponding pin hole 811 and the first annular groove to play a role of fixing the through bush 83; the blind bush 84 is press-fitted in the blind bush mounting hole, the outer peripheral wall of the blind bush 84 is provided with a second annular groove, and another cylindrical pin 85 is provided in the corresponding pin hole 811 and the second annular groove to function as a fixing of the blind bush 84.

Referring to fig. 4 to 10, a tooling installation frame 11 is arranged on a workbench 1, the tooling installation frame 11 is set to be in a U shape, a tooling assembly 2 is located in the middle of the tooling installation frame 11, a through bush press-fitting assembly 3 and a blind bush press-fitting assembly 4 are respectively located on two sides of the tooling installation frame 11, and the through bush press-fitting assembly 3 and the blind bush press-fitting assembly 4 are higher than the tooling assembly 2 in the vertical direction.

The tool assembly 2 comprises an outward expansion positioning tool 21 and a valve plate pre-positioning tool 22, the valve plate pre-positioning tool 22 is arranged on the outward expansion positioning tool 21, the outward expansion positioning tool 21 is used for positioning the valve body 81, and the valve plate pre-positioning tool 22 is used for positioning the valve plate 82. The maximum width of the valve plate pre-positioning tool 22 is smaller than the effective installation width of the outward expansion positioning tool 21, and the effective installation width refers to the maximum width of the outward expansion positioning tool 21 before the outward expansion positioning tool 21 is expanded, that is, the diameter of the outward expansion positioning tool 21 in a normal state. When the valve body 81 is mounted on the outward expansion positioning tool 21, the valve sheet pre-positioning tool 22 cannot collide with the valve body 81.

Referring to fig. 6, 8 and 10, the expanding positioning tool 21 includes a lifting driving device 211, a lifting wedge 212, a base 213, an expanding sleeve 214 and an expanding clamping assembly 215. The base 213 sets up in the middle part of frock mounting bracket 11, and outer sleeve 214 that rises and outer clamping component 215 that rises all set up on base 213, and outer clamping component 215 that rises is established in the outside of outer sleeve 214 that rises outward in the cover. The lifting wedge 212 is a cylinder with a large upper part and a small lower part, the middle part of the lifting wedge 212 passes through the base 213, and the outer peripheral wall of the upper part of the lifting wedge 212 is provided with a first inclined surface gradually converging towards the lower part. The outer expansion sleeve 214 is sleeved on the upper part of the lifting wedge 212, and the inner peripheral wall of the outer expansion sleeve 214 is provided with a second inclined surface matched with the first inclined surface. The lifting driving device 211 is disposed below the base 213, a driving end of the lifting driving device 211 is connected to a lower portion of the lifting wedge 212, and the lifting driving device 211 may be a cylinder driving device or a hydraulic cylinder driving device. The lifting driving device 211 drives the lifting wedge 212 to move along the axial direction of the expanding sleeve 214, the diameter of the expanding sleeve 214 is variable, and in the horizontal direction, the expanding sleeve 214 drives the expanding clamping assembly 215 to perform expanding positioning and releasing actions.

The outer expansion sleeve 214 comprises two elastic rings 2141 and four arc-shaped outer expansion blocks 2142, the four arc-shaped outer expansion blocks 2142 are enclosed to form a ring, two arc-shaped grooves are formed in the outer peripheral wall of each arc-shaped outer expansion block 2142 along the axial direction of the outer peripheral wall, the two arc-shaped grooves are arranged along the extending direction of the arc-shaped outer expansion blocks 2142, the corresponding arc-shaped grooves in each arc-shaped outer expansion block 2142 are arranged at the same height and are communicated with each other, and the elastic rings 2141 are sleeved on the peripheries of the four arc-shaped outer expansion blocks 2142 and are located in the arc-shaped grooves. When the outward force applied by the lifting wedge 212 to the expanding sleeve 214 disappears, the elastic ring 2141 can make the four arc expanding blocks 2142 in the expanded state contract to the initial state in time.

The outward expansion clamping assembly 215 comprises four fixed clamping pieces 2151 and four movable clamping pieces 2152, the fixed clamping pieces 2151 and the movable clamping pieces 2152 are arranged at intervals along the circumferential direction and form a ring, and the movable clamping pieces 2152 can move relative to the fixed clamping pieces 2151 along the radial direction of the outward expansion clamping assembly 215. In the radial direction of the expanding clamp assembly 215, the inner peripheral wall of the movable clamp member 2152 projects inwardly beyond the inner peripheral wall of the fixed clamp member 2151, and the outer peripheral wall of the movable clamp member 2152 is flush with the outer peripheral wall of the fixed clamp member 2151. The number of the movable clamping pieces 2152 is equal to that of the arc-shaped outward expansion blocks 2142, the movable clamping pieces 2152 are arranged corresponding to the arc-shaped outward expansion pieces, and the inner peripheral wall of each movable clamping piece 2152 is adjacent to the outer peripheral wall of each arc-shaped outward expansion piece. In other embodiments, the number of the movable clamping members 2152 may be two, three, or more than five, and the positions of different numbers of the movable clamping members 2152 are different so as to be able to tension and position the valve body 81.

When the lifting driving device 211 drives the lifting wedge 212 to move downward relative to the outer expansion sleeve 214 in the vertical direction, the outer expansion sleeve 214 opens outward in the horizontal direction, and the arc-shaped outer expansion block 2142 pushes the movable clamping pieces 2152 to move outward, so that the four movable clamping pieces 2152 open outward inside the valve body 81, and the tensioning and positioning functions of the valve body 81 are realized; when the lifting driving device 211 drives the lifting wedge 212 to move upward relative to the outer expanding sleeve 214 in the vertical direction, the outer expanding sleeve 214 contracts to an initial state under the contraction action of the elastic ring 2141, and at the moment, the four movable clamping pieces 2152 automatically move inward to a home position under the reverse acting force of the inner side wall of the valve body 81, so that the movable clamping pieces 2152 are separated from the valve body 81, and the release function of the valve body 81 is realized.

With reference to fig. 6 and 8, the valve plate pre-positioning tool 22 includes a bottom plate 221, at least two boss bases 222 and at least two positioning posts 223, the number of the boss bases 222 in this embodiment is preferably three, the three boss bases 222 are linearly arranged on the bottom plate 221, the arrangement direction of the three boss bases 222 is parallel to the extension direction of the second cavity 822 of the valve plate 82, that is, the three boss bases 222 are arranged in the X direction. The top surface of each boss 222 is in the same horizontal plane. The number of the positioning posts 223 is equal to the number of the through holes 821 on the valve plate 82, and two positioning posts 223 are preferred in this example. The positioning pillars 223 are disposed on the boss 222 at both ends, so that a predetermined distance is formed between the two positioning pillars 223, that is, the distance between the two positioning pillars 223 is equal to the distance between the two through holes 821 on the valve sheet 82. The positioning column 223 extends upward in the vertical direction so as to completely penetrate through the through hole 821 of the valve sheet 82.

Referring to fig. 3, 5 to 7, the through-bush press-fitting assembly 3 includes a press rod 31 and a first press-fitting driving device 32, the first press-fitting driving device 32 is fixedly connected to the first side of the tool mounting bracket 11, and the first press-fitting driving device 32 may be an air cylinder driving device or a hydraulic cylinder driving device. The driving end of the first press-fitting driving device 32 is fixedly connected with the connecting end of the pressing rod 31, and the free end of the pressing rod 31 extends to the upper part of the tool assembly 2, namely to the valve plate 82 preset in the valve body 81. The free end of the pressure lever 31 is provided with a stopping portion and a sleeve ring 311, the stopping portion extends along the circumferential direction of the pressure lever 31, the outer diameter of the stopping portion is larger than the inner diameter of the through bushing 83, the through bushing 83 is a bushing with two communicated ends, the through bushing 83 is sleeved on the free end of the pressure lever 31, and the end surface of the through bushing 83 is adjacent to the stopping portion and used for limiting the through bushing 83 to move towards the connecting end of the pressure lever 31. The sleeve ring 311 is an elastic ring, the sleeve ring 311 is sleeved on the pressure lever 31 and is located on one side of the stop portion close to the automatic end of the pressure lever 31, the surface of the sleeve ring 311 slightly protrudes from the peripheral wall of the pressure lever 31, the sleeve ring 311 and the stop portion are arranged close to each other, so that the through bush 83 is sleeved on the outer side of the sleeve ring 311, the position of the through bush 83 on the pressure lever 31 is limited, the through bush 83 is prevented from being shifted along the axial direction of the pressure lever 31, the depth of each through bush 83 pressed into the valve body 81 is controlled, and the subsequent press-fitting quality is improved.

The blind bushing press-fitting assembly 4 includes a push rod 41, a placing seat 42, a second press-fitting driving device 43 and a buffer assembly 44, the second press-fitting driving device 43 is fixedly connected to the second side of the tool mounting frame 11, and the second press-fitting driving device 43 may be an air cylinder driving device or a hydraulic cylinder driving device. The driving end of the second press-fitting driving device 43 is fixedly connected to the connecting end of the push rod 41, the free end of the push rod 41 extends to the upper side of the tooling assembly 2, i.e., extends to the valve plate 82 preset in the valve body 81, the push rod 41 and the press rod 31 are correspondingly arranged, i.e., the push rod 41 and the press rod 31 are respectively arranged at two ends of the extending direction of the second cavity 822 of the valve plate 82, and preferably, the push rod 41 and the press rod 31 are coaxially arranged. The two ends of the buffer assembly 44 are respectively fixedly connected with the push rod 41 and the placing seat 42, and the buffer assembly 44 and the placing seat 42 can horizontally move together along with the push rod 41. The buffer assembly 44 includes a buffer mounting seat 441, a buffer guide post 442, an elastic member 443, and a clamping driving device 444, wherein the buffer mounting seat 441 is provided in an "L" shape, the buffer mounting seat 441 is provided on the push rod 41, the buffer guide post 442 is telescopically provided on the buffer mounting seat 441 and extends in an axial direction of the push rod 41, and the buffer guide post 442 can horizontally move relative to the buffer mounting seat 441. One end of the buffer guide post 442 away from the buffer mounting seat 441 is fixedly connected to the clamping driving device 444, the elastic member 443 is sleeved on the buffer guide post 442, the elastic member 443 elastically abuts between the buffer mounting seat 441 and the clamping driving device 444, and the push rod 41 can move relative to the placing seat 42. The gripping drive 444 may be a pneumatic drive or a hydraulic drive. The placing seat 42 is located between the second press-fitting driving device 43 and the tooling assembly 2, the placing seat 42 includes two half seat bodies, the clamping driving device 444 is respectively connected with the two half seat bodies, and the clamping driving device 444 drives the two half seat bodies to relatively approach or move away. One side that half pedestal is close to relatively is provided with half hole and half groove, two half hole synthetic round holes, two half groove synthesis standing groove 421 that are used for placing blind bush 84, the round hole communicates with each other with standing groove 421, in vertical direction, the round hole, standing groove 421 are equal altitude with push rod 41 respectively, second pressure equipment drive arrangement 43 drive push rod 41 passes the round hole and gets into standing groove 421 and promote blind bush 84 in the standing groove 421 and remove to the top of frock subassembly 2, remove to the blind bush mounting hole of valve body 81 promptly.

After the through bush 83 and the blind bush 84 are press-fitted, the cylindrical pin 85 is press-fitted from the pin holes 811 on both sides of the valve body 81, and the cylindrical pin 85 serves to fix the bushes.

The pressing rod 31 of the embodiment is used for pressing the through bush 83, the push rod 41 is used for pressing the blind bush 84, and the pressing rod 31 and the push rod 41 also have the correcting function. After the valve body 81 is mounted to the outward expansion positioning tool 21, the through bushing mounting hole of the valve body 81 may be misaligned with the pressure rod 31 by a small angle, and the blind bushing mounting hole of the valve body 81 may be misaligned with the push rod 41 by a small angle. At this time, before the outward-expansion positioning tool 21 performs outward-expansion positioning, the pressure lever 31 and the push rod 41 can be driven to move towards the valve body 81 simultaneously, in the process that the pressure lever 31 or the push rod 41 moves forwards, the pressure lever 31 is adjacent to the hole wall of the through bush mounting hole of the valve body 81, the push rod 41 is adjacent to the hole wall of the blind bush mounting hole of the valve body 81, the pressure lever 31 or the push rod 41 can drive the valve body 81 to rotate within a small angle in the horizontal plane, the pressure lever 31 is opposite to the through bush mounting hole, and the push rod 41 is opposite to the blind bush mounting hole, so that the automatic correction function of the position of the valve body 81 is realized.

Referring to fig. 2 and 3, a bushing loading assembly 9 is provided on each side of the through bushing press-fitting assembly 3 and the blind bushing press-fitting assembly 4, respectively. The bushing feeding assembly 9 comprises an X-direction driving device 91, a fixed seat 92, a Y-direction driving device 93 and a feeding clamping head 94. The X-direction driving device 91 is arranged on the tool mounting frame 11, the driving end of the X-direction driving device 91 is fixedly connected with the fixed seat 92, the Y-direction driving device 93 is arranged on the fixed seat 92, the driving end of the Y-direction driving device 93 is fixedly connected with the feeding clamping head 94, and the feeding clamping head 94 extends along the Y direction. The X-direction driving device 91 drives the fixed seat 92 and the Y-direction driving device 93 to move along the X direction, the Y-direction driving device 93 drives the feeding clamping head 94 to move along the Y direction, and the feeding clamping head 94 is used for moving the through bush 83 onto the push rod 41 and moving the blind bush 84 into the placing groove 421.

In order to ensure that the valve body 81 does not have a position offset during the press-fitting process, with reference to fig. 2, 3 and 11, a press-down positioning assembly 5 is further disposed at the rear side of the tooling assembly 2, and the press-down positioning assembly 5 includes a vertical mounting frame 51, a connector mounting seat 52, a press-down head 53 and a press-down driving device 54. The vertical mounting frame 51 extends along the Z direction, the connector mounting seat 52 and the pressing driving device 54 are arranged on the top of the vertical mounting frame 51, the pressing head 53 is detachably connected to the connector mounting seat 52, and the pressing driving device 54 drives the connector mounting seat 52 and the pressing head 53 to move along the Z direction. The lower ram 53 is located above the tooling assembly 2, i.e., above the valve body 81. The lower pressing head 53 is designed to be a hollow cylindrical structure, the lower pressing head 53 is downwards provided with a positioning groove 531 matched with the upper part of the valve body 81, the lower pressing head 53 tightly fixes the valve body 81 through the positioning groove 531, and therefore the valve body 81 is prevented from moving in the vertical direction and the valve body 81 is prevented from inclining to influence the normal press-fitting work.

In order to realize automation, the workbench 1 is further provided with a misplacement detecting assembly 10, a through bush in-place detecting assembly 20 and a plurality of workpiece in-place detecting assemblies in combination with fig. 2, 3 and 7.

The misplacement detection assembly 10 is preferably a proximity sensor. A third cavity 411 is arranged in the push rod 41, and an opening of the third cavity 411 faces to the free end of the push rod 41. The misplacement detection assembly 10 is disposed in the third cavity 411, a detection end of the misplacement detection assembly 10 faces an opening of the third cavity 411, and the misplacement detection assembly 10 can emit detection light to the placing groove 421 along an axial direction of the push rod 41, so as to detect whether the blind bush 84 is placed in the placing groove 421, and also detect whether a placing direction of the blind bush 84 is opposite, where a direction of the blind end of the blind bush 84 facing the push rod 41 is a correct placing direction in this embodiment.

The through bush presence detection assembly 20 may be a photo sensor, in particular a laser sensor. The through bush in-place detecting assembly 20 is disposed at one side of the through bush press-fitting assembly 3 and emits a detection light to the pressing rod 31 for detecting whether the pressing rod 31 is sleeved with the through bush 83.

The workpiece in-place detection assembly can be a photoelectric sensor, and a plurality of workpieces in-place detection assemblies are arranged around the tool assembly 2 and respectively emit detection light to different positions of the valve body 81 from different angles. The workpiece in-place detection assembly of the embodiment is at least provided with three components: the first workpiece in-place detection assembly 30a emits detection light from the through bush mounting hole of the valve body 81 to the valve plate 82 in the valve body 81 for detecting whether the valve plate 82 is in place; the second workpiece in-place detection assembly 30b emits detection light to the hole wall of the through bush mounting hole of the valve body 81 for detecting whether the press fitting of the through bush 83 is completed; the third workpiece in-place detection assembly 30c emits detection light to the hole wall of the blind bush mounting hole of the valve body 81 for detecting whether the press fitting of the blind bush 84 is completed. The second and third workpiece in-position detection assemblies can also detect whether the valve body 81 is in position.

Referring to fig. 12 to 14, the clearance amount detecting device 6 is used to detect the clearance amount L between the liner and the valve plate in the egr valve assembly. The gap amount detecting device 6 comprises a detecting mounting seat 61, a back-and-forth shifting assembly 62, a shifting driving device 63, a positioning seat 64, a displacement detecting assembly 65 and a limiting fixing assembly 66. The detection mounting seat 61 is arranged on the workbench 1 and is positioned on one side of the tool assembly 2.

The detection mount 61 includes a top plate 611, a detection base 612, and two side plates 613, the two side plates 613 being disposed at both ends of the top plate 611, and the detection base 612 being disposed below the top plate 611. The middle part of the top plate 611 is provided with a second avoiding hole 6111, the detection base 612 is provided with an accommodating cavity 6121, and the second avoiding hole 6111 is vertically communicated with the accommodating cavity 6121. The positioning seat 64 sequentially includes an insertion portion, a support portion, and a positioning portion from bottom to top, the insertion portion is inserted into the second avoiding hole 6111, the support portion is located on the upper surface of the top plate 611, and the positioning portion is used to fix the valve body 81. The positioning seat 64 is provided with a first avoiding hole 641 in a penetrating manner along the vertical direction, and the first avoiding hole 641 is communicated with the upper side and the lower side of the top plate 611, that is, the first avoiding hole 641 is communicated with the inside of the valve body 81 upwards and communicated with the accommodating cavity 6121 downwards.

The displacement detecting assembly 65 is provided on the first side plate 613, the displacement detecting assembly 65 includes a detecting head 651, a displacement detecting device 652, and a detecting movement driving device 653, and the detecting movement driving device 653 drives the detecting head 651 to move in the horizontal direction to above the positioning socket 64, that is, drives the detecting head 651 to move toward the inside of the through bush 83 so as to enter the inside of the valve body 81. The displacement detecting devices 652 may be displacement sensors, and the displacement detecting devices 652 are connected to the detecting heads 651 in number.

The position limiting fixing assembly 66 is disposed on the second side plate 613, that is, the position limiting fixing assembly 66 is disposed on a side of the positioning seat 64 away from the displacement detecting assembly 65. The spacing fixing assembly 66 includes a spacing head 661 and a spacing driving device 662, and the spacing driving device 662 may be a cylinder driving device for driving the spacing head 661 to move above the positioning seat 64, i.e. for driving the spacing head 661 to abut against the valve body 81. In the vertical direction, the spacing head 661 and the detecting head 651 may be at the same height, or the spacing head 661 and the detecting head 651 may have different height positions. Under the cooperation of the positioning portion of the positioning seat 64, the limiting head 661 functions to fix the valve body 81, thereby preventing the valve body 81 from tilting or shifting.

Toggle assembly 62 includes a distance adjustment drive 621, two stops 622, and two toggle posts 623. The two limit blocks 622 are arranged in the accommodating cavity 6121 in the moving direction of the detection head 651, the distance adjustment driving device 621 is located between the two limit blocks 622, two ends of the distance adjustment driving device 621 are connected with the two limit blocks 622 respectively, and the distance adjustment driving device 621 can drive the two limit blocks 622 to be relatively close to or far away from each other. The lower part of the toggle column 623 is connected with the limiting block 622, the two toggle columns 623 are arranged along the moving direction of the detection head 651, the upper part of the toggle column 623 penetrates through the first avoiding hole 641 and extends into the valve body 81 and is inserted into the through hole 821 of the valve plate 82, and the toggle column 623 and the valve plate 82 are connected. In the vertical direction, the upper part of the toggle column 623 extends into the valve plate 82, and the top wall of the toggle column 623 is not lower than the detection head 651, so that the detection head 651 can abut against the closest toggle column 623 to detect the relative movement distance of the toggle column 623. Specifically, when the valve plate 82 moves rightwards until the gap between one end of the valve plate and the through bush 83 is zero, the detection head 651 detects and records the position of the toggle column 623 at the moment, and the position is set as a relative reference position; when the valve plate 82 moves leftwards until the gap between the other end of the valve plate and the blind bush 84 is zero, the detection head 651 detects and records the position of the toggle column 623 at the moment, and the position is set as a detection position; then, the distance between the relative reference position and the detection position is calculated, which is the total amount of clearance between the two bushes and the valve plate 82. In other embodiments, the valve plate 82 may be moved leftwards until the gap between the other end of the valve plate 82 and the blind bushing 84 is zero, the detection head 651 detects that the position of the closest toggle post 623 is a relative reference position, and then the valve plate 82 is moved, so as to measure the total gap between the two bushings and the valve plate 82 in the same manner.

In this embodiment, the distance between the two toggle columns 623 is adjustable, that is, the distance between the two limit blocks 622 can be adjusted by the distance adjustment driving device 621, so as to adjust the distance between the two toggle columns 623, which is convenient for being compatible with EGR valves 8 of different models.

In order to realize the back and forth movement of the toggle column 623, two toggle driving devices 63 are provided in the present embodiment, and the two toggle driving devices 63 are respectively disposed on the outer sides of the two opposite side walls of the detection base 612. The side wall of the detection base 612 is provided with a third avoidance hole 6122, and the third avoidance hole 6122 is communicated with the accommodating cavity 6121. A guide post is further disposed in the accommodating cavity 6121, and the guide post extends along the moving direction of the detection head 651. The both ends of guide post are connected with the both sides lateral wall that detects base 612 respectively, and two stopper 622 are passed at the middle part of guide post for two stopper 622 move along the extending direction of guide post. The toggle driving device 63 is preferably a cylinder driving device, and a driving end of the toggle driving device 63 passes through the third avoiding hole 6122 and extends into the accommodating cavity 6121 and is located at one side of the toggle assembly 62. The driving end of the toggle driving device 63 abuts against the nearest stopper 622, and can push the stopper 622 to move in one direction, i.e. the toggle driving device 63 pushes the whole toggle assembly 62 to move towards the front of itself. The two toggle assemblies 62 are oppositely arranged, i.e. the two toggle driving devices 63 are driven in opposite directions, so as to push the toggle assemblies 62 to move back and forth in opposite directions. When the toggle assembly 62 moves back and forth in two opposite directions, the two toggle posts 623 move back and forth in the first avoidance hole 641 and the valve body 81, that is, the toggle posts 623 move back and forth between the through bush 83 and the blind bush 84, and at this time, the moving direction of the toggle posts 623 is the same as that of the detection head 651.

In this embodiment, the limiting block 622 may further include an extending block 624, an upper portion of the extending block 624 extends into the first avoiding hole 641, the extending block 624 can move back and forth in the first avoiding hole 641, and a middle portion of the toggle column 623 is disposed in the extending block 624. The arrangement of the extension block 624 is beneficial to protecting the toggle column 623 and preventing the toggle column 623 from bending and deforming on the one hand, and can limit the moving distance of the toggle column 623 in the first avoiding hole 641 and prevent excessive movement on the other hand.

The clearance amount detection device 6 further includes a workpiece-in-position detection mechanism 67, the workpiece-in-position detection mechanism 67 being provided on the table 1 on the side of the detection mount base 61, the workpiece-in-position detection mechanism 67 preferably being a photoelectric sensor, the workpiece-in-position detection mechanism 67 emitting detection light toward the positioning base 64, that is, toward the valve body 81, for detecting whether the EGR valve 8 is in position.

In conclusion, the valve block is placed in the valve body according to the preset angle by arranging the outward expansion positioning tool for positioning the valve body and arranging the valve block pre-positioning tool for positioning the valve block, so that the valve block and the valve block can be conveniently installed, and the assembly efficiency is improved; by arranging the outward expansion positioning tool, the valve body is positioned from the inside of the valve body due to the consistent internal structure of the valve bodies of different models, so that the valve body is compatible with the valve bodies of different models, and the outward expansion positioning tool has the advantage of strong compatibility; by arranging the pressure lever, the through bush is sleeved on the pressure lever, and the first press-fitting driving device is utilized to drive the pressure lever to drive the through bush to be installed in the through bush installation hole of the valve body; the blind bushing mounting structure has the advantages that the placing groove is used for placing the blind bushing, the second press-fitting driving device is used for driving the push rod to push the blind bushing to be mounted in the blind bushing mounting hole of the valve body, and press-fitting of the through bushing and the blind bushing can be carried out simultaneously only by once positioning, so that press-fitting efficiency and press-fitting quality are improved.

Finally, it should be emphasized that the above-described preferred embodiments of the present invention are merely examples of implementations, not limitations, and various changes and modifications may be made by those skilled in the art, without departing from the spirit and scope of the invention, and any changes, equivalents, improvements, etc. made within the spirit and scope of the present invention are intended to be embraced therein.

Claims

1. Exhaust gas recirculation valve assembly bush pressure equipment device, its characterized in that includes:

the tool assembly comprises an outer expansion positioning tool and a valve block pre-positioning tool, the valve block pre-positioning tool is arranged on the outer expansion positioning tool, the maximum width of the valve block pre-positioning tool is smaller than the effective installation width of the outer expansion positioning tool, the outer expansion positioning tool comprises a lifting driving device, a lifting wedge block, an outer expansion sleeve and an outer expansion clamping assembly, the outer expansion clamping assembly comprises a plurality of fixed clamping pieces and a plurality of movable clamping pieces, the fixed clamping pieces and the movable clamping pieces are arranged at intervals in the circumferential direction and are enclosed into a ring, the lifting driving device is connected with one end of the lifting wedge block, the outer expansion sleeve is sleeved at the other end of the lifting wedge block, the outer expansion clamping assembly is sleeved outside the outer expansion sleeve, and the lifting driving device drives the lifting wedge block to move along the axial direction of the outer expansion sleeve, the diameter of the outward expansion sleeve is changed, and the movable clamping piece is driven to move along the radial direction of the outward expansion clamping assembly;

the through bush press-fitting assembly is positioned on the first side of the tool assembly and comprises a pressing rod and a first press-fitting driving device, and the first press-fitting driving device drives the pressing rod to move towards the upper part of the outward expansion positioning tool;

the blind bush press-fitting assembly is located on the second side of the tool assembly and comprises a push rod, a placing seat and a second press-fitting driving device, the placing seat is located between the outward-expanding positioning tool and the second press-fitting driving device, a placing groove is formed in the placing seat, the second press-fitting driving device drives the push rod to penetrate through the placing groove to move towards the upper portion of the outward-expanding positioning tool, and the push rod and the press rod are correspondingly arranged.

2. The exhaust gas recirculation valve assembly liner press-fitting device of claim 1, wherein:

the outer expansion sleeve comprises an elastic ring and a plurality of arc-shaped outer expansion blocks, the arc-shaped outer expansion blocks are encircled to form a ring shape, the elastic ring is sleeved on the periphery of the arc-shaped outer expansion blocks, an arc-shaped groove is formed in the peripheral wall of the arc-shaped outer expansion blocks along the circumferential direction of the peripheral wall, and the elastic ring is located in the arc-shaped groove.

3. The exhaust gas recirculation valve assembly liner press-fitting device of claim 2, wherein:

in the radial direction of the outward expansion clamping component, the inner peripheral wall of the movable clamping piece protrudes inwards out of the inner peripheral wall of the fixed clamping piece, the arc outward expansion block is arranged corresponding to the movable clamping piece, and the outer peripheral wall of the arc outward expansion block is adjacent to the inner peripheral wall of the movable clamping piece.

4. The exhaust gas recirculation valve assembly liner press-fitting device of claim 1, wherein:

the valve block pre-positioning tool comprises a bottom plate, at least two protruding seats and at least two positioning columns, the protruding seats are arranged on the bottom plate along the moving direction of the pressing rod, the top surfaces of the protruding seats are located in the same plane, the positioning columns are arranged on the protruding seats and extend upwards along the vertical direction, and the distance between the positioning columns is preset at intervals in the horizontal direction.

5. The exhaust gas recirculation valve assembly liner press-fitting device of claim 1, wherein:

the blind bush press-fitting assembly further comprises a buffer assembly, two ends of the buffer assembly are respectively and fixedly connected with the push rod and the placing seat, and the buffer assembly and the placing seat can move together along with the push rod;

the buffering subassembly includes buffering mount pad, buffering guide post and elastic component, the buffering mount pad sets up on the push rod, the buffering guide post telescopically sets up on the buffering mount pad and follow the axial extension of push rod, place the seat setting and be in the buffering guide post is kept away from the one end of buffering mount pad, the elastic component cover is established on the buffering guide post, just elastic component elasticity butt is in place the seat with between the buffering mount pad, the push rod can be relative place the seat and remove.

6. The exhaust gas recirculation valve assembly liner press-fitting device of claim 1, wherein:

the device comprises a through bush press-fitting assembly, a blind bush press-fitting assembly, a bush feeding assembly and a tool assembly, wherein the through bush press-fitting assembly and one side of the blind bush press-fitting assembly are respectively provided with the bush feeding assembly, the bush feeding assembly comprises an X-direction driving device, a fixed seat, a Y-direction driving device and a feeding clamping head, the X-direction driving device drives the fixed seat to move along the X direction, the Y-direction driving device is arranged on the fixed seat, and the Y-direction driving device drives the feeding clamping head to move along the Y direction.

7. The exhaust gas recirculation valve assembly liner press-fitting apparatus of any of claims 1-6, wherein:

exhaust gas recirculation valve assembly bush pressure equipment device still includes pushes down locating component, it includes vertical mounting bracket, joint mount pad, pushes down the pressure head and pushes down drive arrangement to push down locating component, vertical mounting bracket sets up one side of frock subassembly, the joint mount pad with it all sets up to push down drive arrangement on the vertical mounting bracket, it connects to push down head detachably on the joint mount pad, just it is located to push down the pressure head the top of frock subassembly, it drives to push down drive arrangement the joint mount pad with the pressure head down to the frock subassembly removes, positioning groove has been seted up downwards to the pressure head down.

8. The exhaust gas recirculation valve assembly liner press-fitting apparatus of any of claims 1-6, wherein:

exhaust gas recirculation valve assembly bush pressure equipment device still includes the detection component that misplaces, leads to the bush detection component and a plurality of work piece detection component that is in place, the detection component that misplaces sets up in the push rod and follow the axial of push rod to the standing groove transmission detects the light, lead to the bush detection component that is in place to be located lead to one side of bush pressure equipment component and to the depression bar transmission detects the light, and is a plurality of the work piece detection component that is in place sets up around the frock subassembly and respectively towards frock subassembly direction transmission detects the light.

9. The exhaust gas recirculation valve assembly liner press-fitting apparatus of any of claims 1-6, wherein:

exhaust gas recirculation valve assembly bush pressure equipment device still includes workstation, material spare subassembly and clearance volume detection device of keeping in, material spare keep in the subassembly clearance volume detection device the frock subassembly lead to the bush pressure equipment subassembly with blind bush pressure equipment subassembly all sets up on the workstation, material spare keep in the subassembly and include work or material rest and a plurality of magazine, the magazine sets up on the work or material rest.