CN111843355A

CN111843355A - Automatic welding device for steering yoke

Info

Publication number: CN111843355A
Application number: CN202010953344.XA
Authority: CN
Inventors: 秦亮; 赵亚衡
Original assignee: Zhejiang Jade Strong Machinery Ltd By Share Ltd
Current assignee: Zhejiang Jade Strong Machinery Ltd By Share Ltd
Priority date: 2020-09-11
Filing date: 2020-09-11
Publication date: 2020-10-30

Abstract

The invention provides an automatic welding device for a steering yoke, and belongs to the technical field of positioning fixtures. It has solved the comparatively troublesome and not high problem of positioning accuracy of current festival fork welding machine centre gripping location. This device is including the gear motor who has the output shaft, still include sleeve and ejector pin, the cover is equipped with slider and ejector pin circumference fixed on the ejector pin, telescopic port department is equipped with the stop part, the ejector pin overcoat is equipped with the spring, and the one end roof pressure of spring makes it support on the slider and lean on the stop part, still be equipped with on the slider stretch out the sleeve be used for with pitch fork centre bore complex joint outward, it can stretch into the stroke inslot to set up stroke groove and ejector pin on the joint, this device is still including wearing to establish the diameter of reference column and the reference column of stroke inslot slightly to be less than the width in stroke groove, when the relative ejector pin of slider slides the ejector pin can stretch into the stroke inslot and promote the reference column. This device stability is good and welding precision obtains promoting by a wide margin in processing.

Description

Automatic welding device for steering yoke

Technical Field

The invention belongs to the technical field of positioning fixtures, relates to a device, and particularly relates to an automatic welding device for a steering yoke.

Background

The steering yoke for the automobile comprises a yoke and a shaft, wherein the yoke comprises a central hole and two mutually symmetrical lug seats, two hole sites with the same size as the central line are respectively arranged on the two lug seats, and the two hole sites are used for being connected with a yoke arm. The diameter of the shaft is generally larger than that of the joint between the yoke and the shaft, and one end part of the shaft is required to extend into a central hole of the yoke, and then the joint between the yoke and the shaft is welded and fixed by welding. Because the yoke belongs to irregular work piece, the axle is the cylindricality again, so current welding mode all is carried out by hand, and the problem that manual welding accompanies has the phenomenon that the low productivity of the lower speed of welding is not high and the phenomenon that the labour that uses is more the manufacturing cost is higher to exist.

Later along with the improvement of science and technology, the automatic welding machine for the joint fork and the shaft is invented, and the application numbers are as follows: 201721092946.0A flat tube and joint yoke welding machine for electric steering axle has a speed reducer at one end of its operating panel, a speed reducer motor with a clamp for clamping the joint yoke, and a cylinder for pressing the end of axle into the central hole of joint yoke, and a welding gun beside the speed reducer motor for welding the joint yoke and axle. But because the festival fork is that the special-shaped workpiece is comparatively troublesome in the centre gripping of location, two ear seats card through the festival fork of this anchor clamps are established in the square groove and are played the effect of location moreover, add processing like this the festival fork and move towards one side ear seat direction skew easily, and its positional stability is relatively poor for the axle is not high with the cooperation precision of festival fork centre bore, and the festival fork axle defective rate that the welding came out is higher, is unfavorable for the production and promotes. Therefore, the problem of solving the above existing problem is that the matters to be handled are not buffered at present.

Disclosure of Invention

The invention aims to provide a device for automatically welding a steering yoke, aiming at the problems in the prior art. It is comparatively troublesome and the not high technical problem of positioning accuracy of current festival fork welding machine centre gripping location that it was solved.

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

the utility model provides a knuckle fork automatic weld's device, this device is including the gear motor who has the output shaft, its characterized in that, still including fixing the sleeve on the output shaft and being located the sleeve and the ejector pin that one end links firmly with the output shaft, the cover is equipped with slider and ejector pin circumference fixed on the ejector pin, telescopic port department is equipped with the stop part, the ejector pin overcoat is equipped with the spring, and the one end roof pressure of spring makes it support and lean on the stop part on the slider, still be equipped with on the slider and stretch out the sleeve and be used for and pitch fork centre bore complex joint outward, the last stroke groove of having seted up of joint just the ejector pin can stretch into the stroke inslot, and this device is still slightly less than the width in stroke groove including the diameter of reference column and the reference column of wearing to establish in the stroke inslot, when the relative ejector pin of slider slides the ejector pin.

The device comprises a speed reducing motor with an output shaft, wherein the conventional speed reducing motor is provided with the output shaft, and the output shaft can rotate in the circumferential direction under the driving of the speed reducing motor.

The device comprises a sleeve fixed on an output shaft and a mandril which is positioned in the sleeve and one end of which is fixedly connected with the output shaft, wherein a slide block is sleeved on the mandril and is circumferentially fixed with the mandril. The sleeve is annular, and telescopic one end links firmly and sets up with the output shaft coaxial line with the output shaft. The ejector pin is arranged in the sleeve in a penetrating mode, one end of the ejector pin is fixed with the output shaft, and the ejector pin and the output shaft are arranged coaxially. The sliding block can slide relative to the ejector rod and can rotate along with the ejector rod when the ejector rod rotates in the circumferential direction. The end opening of the sleeve is provided with a blocking part, the ejector rod is sleeved with a spring, and one end of the spring is pressed on the sliding block to enable the sliding block to abut against the blocking part. The blocking part can be abutted against the sliding block to limit the sliding block to fall out of the sleeve, one end of the spring is abutted against the end face of the output shaft, the other end of the spring is abutted against the sliding block to enable the sliding block to abut against the blocking part, and therefore the sliding block can overcome the elastic force of the spring to move towards the direction of motion of the output shaft when the sliding block is abutted against the blocking part, and the sliding block can be abutted against the blocking part again by the spring when external force disappears.

Still be equipped with on the slider stretch out the sleeve be used for with section fork centre bore complex joint, when welding section fork, we first select to let the joint stretch into between two ear seats of section fork, then the tip of joint can stretch into the centre bore of section fork, two ear seats are one on the other and distribute, because the ear seat that the effect of gravity lies in the joint top can support and lean on the outer peripheral face of joint, make whole section fork can keep flat on the joint, it is comparatively convenient when changing section fork after setting up section fork welding completion like this, do not need manual to go to support section fork, direct alignment centre bore place on the joint can. The travel groove is formed in the joint, the travel groove is formed in the position below the lug seat after the section fork is placed horizontally, the hole position in the lug seat can be opposite to the travel groove, the travel groove is located in the lateral direction of the joint and penetrates through the joint, and therefore the two lug seats on the section fork are located in the upper notch and the lower notch of the travel groove respectively. The device also comprises a positioning column which is arranged in the stroke groove in a penetrating mode, the diameter of the positioning column is slightly smaller than the width of the stroke groove, and the positioning column can be abutted and limited by the groove walls on the two sides of the stroke groove when extending into the stroke groove. So place the yoke on the joint earlier and then use the reference column to insert the hole site on the ear seat of yoke, the reference column continues to stretch into the stroke inslot and continues to pass the ear seat hole site of yoke downside, the reference column supports by spacing by the side direction spacing of two ear seats of yoke promptly with the both sides cell wall in stroke groove, effectually prevent to make yoke side direction off normal because exogenic action, the ear seat of yoke supports and makes its top and bottom obtain the location on the joint, it is comparatively convenient to set up the clamping location that makes the yoke like this, it is comparatively convenient to set up like this that the reference column stretches into the hole site of ear seat and the stroke inslot through the mode of interlude and dismantles or install like this. And four directions all are fixed a position about the upper and lower of festival fork, and the precision of fixing a position like this is higher than conventional centre gripping location and will be a lot of, and is more stable in processing, and welding precision is promoted by a wide margin.

When the sliding block slides relative to the ejector rod, the ejector rod can extend into the stroke groove and push the positioning column to move towards one side of the stroke groove. After the joint fork is fixed, a shaft on the other side of a center hole of the joint fork is driven by an air cylinder to be pressed into the center hole of the joint fork, the shaft can be abutted against the joint head and continue to be pressed against the joint head to enable the joint head to overcome the elasticity of a spring to move towards the sleeve when entering the center hole, the ejector rod can enter a stroke groove under the sliding of the sliding block to be abutted against a positioning column to limit the displacement of the ejector rod along with the joint head, when one end of the shaft completely enters the center hole of the joint fork, the speed reduction motor rotates a welding gun on one side of the speed reduction motor to be welded close to the connection position of the shaft and the joint fork, the joint fork can only slide along the length direction of the stroke groove and is not easy to deviate, so that the shaft is not prone to extend into the center.

In foretell knuckle fork automatic weld's device, be equipped with a plurality of evenly distributed's fin along its axial on the ejector pin outer peripheral face, slider central point puts and sets up the mounting hole that can supply the ejector pin to stretch into and communicate with the stroke groove, is equipped with the draw-in groove that corresponds with the fin on the inner wall of mounting hole, the ejector pin stretch into in the mounting hole just fin and draw-in groove joint.

Be equipped with a plurality of evenly distributed's fin along its axial on the ejector pin outer peripheral face, the fin is rectangular shape and distributes on the outer peripheral face of ejector pin and along the length direction of ejector pin, is equipped with the draw-in groove that corresponds with the fin on the inner wall of mounting hole, and the draw-in groove also is rectangular shape, and when the ejector pin stretched into the mounting hole, the fin was located the draw-in groove and by the spacing slider that leads to of draw-in groove and ejector pin circumference fixed. And the fin on the ejector pin outer peripheral face has several, corresponds the draw-in groove in the mounting hole and also has the several, sets up like this and makes circumference fixed more stable for the precision of location further obtains promoting.

In the above-mentioned device for automatically welding the steering yoke, a convex annular blocking edge is arranged laterally on the sliding block, the blocking part is a convex edge protruding towards the inner side of the sleeve, and the sliding block enables the annular blocking edge to be axially limited by abutting against the convex edge under the action of spring force.

The annular keeps off along keeping off with protruding edge mainly be for axial limiting slide, with the one end restriction of slider prevent that it from falling out outside the sleeve, the annular keeps off along slider circumference distribution moreover, protruding along the inboard circumference of sleeve distributes, both circumference support by stability higher for the precision of location further obtains promoting.

In the above automatic welding device for the steering yoke, the two side groove walls of the stroke groove along the length direction of the clamping head are provided with a first arc-shaped chamfer groove and a second arc-shaped chamfer groove, and the positioning column can make the peripheral surface of the positioning column abut against the groove wall of the first chamfer groove or the second chamfer groove through sliding.

The design of chamfer groove one and chamfer groove two makes can comparatively agree with when reference column and the length direction's of stroke groove both sides cell wall support to lean on that curved cell wall supports to support with reference column curved outer peripheral face, makes the wearing and tearing of the outer peripheral face of reference column obtain alleviating like this at the clamping festival fork that relapses and welded in-process, makes its and the groove width of stroke groove comparatively agree with can be by better spacing, and positioning accuracy obtains further improvement.

In the above automatic welding device for the steering yoke, the end surface of the ejector rod is an arc surface with the same radian as the groove wall of the first chamfer groove.

The design of arcwall face also plays the outer peripheral face that can agree with the reference column more in with the reference column contact, prevent to damage the outer peripheral face of reference column when the slider is gliding, the reference column can rotate, can influence the reference column by the spacing precision of the width place cell wall of stroke groove when the wide place position in groove that the damage position rotated the stroke groove after its peripheral face damage, make the reference column can control and rock the precision that influences the location, so the design of arcwall face can make it agree with the reference column outer peripheral face contact more when, thereby further increase the location precision.

In the above automatic welding device for the steering yoke, an annular convex part protruding in the radial direction is arranged on the positioning column and located outside the stroke groove, and the diameter of the annular convex part is larger than the width of the stroke groove.

The existence of annular convex part makes the reference column can block to establish on the stroke groove, prevents that it from passing the stroke groove, conveniently takes for the speed of centre gripping location obtains further promotion.

In the above-mentioned device for automatically welding a steering yoke, the clamping head includes a head portion extending into a center hole of the yoke and a body portion located between two lug seats of the yoke, and the stroke groove laterally penetrates the body portion.

The clamping head comprises a head part and a cylindrical body part, wherein the head part extends into a central hole of the joint yoke, the clamping head comprises two sections, the body part is positioned between two lug seats, the diameter of the body part is slightly smaller than the distance between the lug seats, the head part extends into the central hole of the joint yoke, so that the front end and the rear end of the joint yoke are fixed, and the positioning accuracy is high.

In the above device for automatically welding the steering yoke, the notch parts at two sides of the stroke groove are further provided with a first cutting groove and a second cutting groove.

Because the inner side surface of the ear seat of the yoke is a plane, and the body part is a cylindrical outer side surface which is a circumferential surface, the arrangement of the first cutting groove and the second cutting groove enables the inner side surface of the ear seat to be more stable when the inner side surface of the ear seat is abutted against the first cutting groove and the second cutting groove, the positioning stability is higher, the first cutting groove and the second cutting groove are equivalent to marks on the outer circumferential surface of the body part, the ear seat can be positioned in place more quickly, and the clamping and positioning speed is further improved.

In the above device for automatically welding the steering yoke, the output shaft is provided with a raised guide head, the ejector rod is in threaded connection with the guide head, one end surface of the slider is provided with a guide groove, one end of the spring extends into the guide groove and is pressed against the bottom of the guide groove, and the other end of the spring is sleeved outside the guide head and is pressed against the end surface of the output shaft.

In the above-mentioned device for automatically welding a steering yoke, an inner side of an end opening of the sleeve has an internal thread, and the sleeve is connected to the output shaft through the thread.

Compared with the prior art, the product has the advantages that: the clamping head of the device extends into the space between two lug seats of the yoke to be abutted against the lug seats, the positioning columns extend into hole positions on the lug seats and penetrate through the travel grooves to be abutted against and limited by the groove walls of the lug seats, the four directions of the upper direction, the lower direction, the left direction and the right direction are positioned, the positioning precision is higher than that of conventional clamping and positioning, the clamping and positioning are more stable in processing, and the welding precision is greatly improved.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of a component of the apparatus of the present invention;

FIG. 3 is a half sectional view of the apparatus of the present invention;

FIG. 4 is a schematic detail view of a slider of the present invention;

FIG. 5 is a half sectional view of the slider of the present invention;

FIG. 6 is a schematic view of the parts of the carrier rod of the present invention;

fig. 7 is a schematic view of a positioning post of the present invention in detail.

In the figure, 1, a speed reducing motor; 11. an output shaft; 111. a guide head; 2. a sleeve; 21. a convex edge; 3. a top rod; 31. a rib; 32. an arc-shaped surface; 4. a slider; 41. a clamping head; 411. a stroke slot; 412. a chamfer groove I; 413. a chamfer groove II; 414. a head portion; 415. a body part; 416. cutting a first groove; 417. cutting a groove II; 42. mounting holes; 43. a card slot; 44. an annular blocking edge; 45. a guide groove; 5. a spring; 6. a positioning column; 61. an annular protrusion.

Detailed Description

The following are specific embodiments of the present invention and are further described with reference to the drawings, but the present invention is not limited to these embodiments.

Example one

The device for automatically welding the steering yoke as shown in fig. 1-3 comprises an operation panel, a speed reducing motor 1 with an output shaft 11, a device fixedly connected to the output shaft 11, a pushing cylinder, an auxiliary clamping head connected to the pushing cylinder and a welding gun assembly positioned on one side of the speed reducing motor 1. The auxiliary clamping head is arranged above the pushing cylinder and can be driven by the pushing cylinder to move. The auxiliary clamping head is arranged opposite to the device, after the joint fork is clamped and positioned on the device, one end of the shaft is aligned to a central hole of the joint fork, the auxiliary clamping head is driven by the pushing cylinder to be close to and abut against the other end of the shaft, one end of the shaft can be pressed into the central hole of the joint fork along with the continuous abutting of the pushing cylinder, and then the output shaft 11 of the speed reducing motor 1 rotates to enable the welding gun on the welding gun assembly to be close to the initial contact position of the joint fork and the shaft to be welded.

The device consists of a sleeve 2, an ejector rod 3, a sliding block 4 and a spring 5, wherein a raised guide head 111 is arranged on an output shaft 11, the ejector rod 3 is in threaded connection with the guide head 111, a guide groove 45 is formed in the left end face of the sliding block 4, one end of the spring 5 extends into the guide groove 45 and is pressed on the groove bottom of the guide groove 45, and the other end of the spring 5 is sleeved outside the guide head 111 and is pressed on the end face of the output shaft 11. The port department of sleeve 2 is equipped with the part of blockking, and the part of blockking is radial inside bellied protruding edge 21, and ejector pin 3 wears to establish one end and output shaft 11 fixed and ejector pin 3 also sets up with output shaft 11 coaxial line in sleeve 2. The sliding block 4 can slide relative to the top rod 3 and the sliding block 4 can rotate along with the top rod 3 when the top rod 3 rotates circumferentially. When the slide block 4 is pressed, the slide block 4 can move towards the direction of the movement of the output shaft 11 against the elastic force of the spring 5, and can be pressed on the blocking part again by the spring 5 when the external force disappears. The peripheral surface of the sliding block 4 is provided with a raised annular blocking edge 44, and the sliding block 4 enables the annular blocking edge 44 to be abutted against the raised edge 21 to be axially limited under the action of the elastic force of the spring 5. Annular fender is mainly for axial spacing slider 4 along the support of protruding edge 21 along 44, restricts the one end of slider 4 and prevents that it from falling out outside sleeve 2, and annular fender is followed slider 4 circumference distribution along 44 moreover, and protruding edge 21 is along the inboard circumference distribution of sleeve 2, and both circumference support to lean on stability higher.

As shown in fig. 1-7, a mounting hole 42 is formed in the center of the slider 4 for the ejector rod 3 to extend into and communicate with the stroke slot 411, a slot 43 corresponding to the protruding rib 31 is formed in the inner wall of the mounting hole 42, the ejector rod 3 extends into the mounting hole 42, the protruding rib 31 is connected with the slot 43 in a clamping manner, the slot 43 is also in a long strip shape, and when the ejector rod 3 extends into the mounting hole 42, the protruding rib 31 is located in the slot 43 and is limited by the slot 43, so that the slider 4 and the ejector rod 3 are circumferentially fixed. And the convex rib 31 on the outer peripheral surface of the ejector rod 3 is provided with a plurality of convex ribs, and the corresponding clamping grooves 43 in the mounting holes 42 are also provided with a plurality of convex ribs, so that the circumferential fixation is more stable.

Still be equipped with on the slider 4 and stretch out sleeve 2 outer be used for with section fork centre bore complex joint 41, joint 41 is including stretching into section fork centre bore head 414 and the body 415 that is the cylindricality, the stroke groove 411 that runs through it is seted up to body 415 side direction, stroke groove 411 is rectangular shape, body 415 is located between two ear seats, its diameter size is slightly littleer than the distance between the ear seat, and head 414 is then stretching into section fork centre bore, all fixed the front end and the rear end of section fork like this, the location precision is higher. A first cutting slot 416 and a second cutting slot 417 are also formed in the notches on the two sides of the stroke slot 411. Because the inner side surface of the ear seat of the yoke is a plane, and the cylindrical outer side surface of the body part 415 is a circumferential surface, the arrangement of the first cutting groove 416 and the second cutting groove 417 ensures that the inner side surface of the ear seat is more stable when abutting against the first cutting groove 416 and the second cutting groove 417, the positioning stability is higher, the first cutting groove 416 and the second cutting groove 417 are equivalent to marks on the outer circumferential surface of the body part 415, the ear seat can be positioned in place more quickly, and the clamping and positioning speed is further improved.

When welding the festival fork, we at first need let joint 41 stretch into between two ear seats of festival fork, then the tip of joint 41 can stretch into the centre bore of festival fork, two ear seats are one on the other and distribute, because the ear seat that the effect of gravity lies in joint 41 top can support and lean on the outer peripheral face of joint 41, make whole festival fork can keep flat on joint 41, it is comparatively convenient when changing the festival fork after setting up the festival fork welding completion like this, do not need manual going to support the festival fork, direct alignment centre bore place on joint 41 can. The bayonet joint 41 has a lateral stroke slot 411, the position where the stroke slot 411 is located is below the ear mount of the yoke after being placed flat, so that the hole position on the ear mount can be opposite to the stroke slot 411, and because the stroke slot 411 passes through the bayonet joint 41 laterally, two ear mounts on the yoke are located at the upper notch and the lower notch of the stroke slot 411 respectively.

This device still includes to wear to establish reference column 6 in stroke groove 411 and the diameter of reference column 6 slightly is less than the width in stroke groove 411, sets up like this and just can be supported by the both sides cell wall of stroke groove 411 spacing when the reference column 6 stretches into in the stroke groove 411. The positioning column 6 is provided with a radially protruding annular convex part 61 outside the stroke slot 411, and the diameter of the annular convex part 61 is larger than the width of the stroke slot 411. The existence of annular convex part 61 makes reference column 6 can block to establish on stroke slot 411, prevents that it from passing stroke slot 411, conveniently takes for the speed of centre gripping location obtains further promotion. So place the yoke on joint 41 earlier and then use the reference column 6 to insert the hole site on the ear seat of yoke, reference column 6 continues to stretch into in stroke groove 411 and continues to pass the ear seat hole site of yoke downside, reference column 6 supports by spacing two ear seats of being the yoke promptly with the both sides cell wall of stroke groove 411 by the side direction spacing, effectual preventing makes yoke side direction off normal because exogenic action, the ear seat of yoke supports and makes its upper and lower obtaining the location by joint 41, it is comparatively convenient to set up the clamping location that makes the yoke like this, it is comparatively convenient to set up like this in hole site and the stroke groove 411 that reference column 6 stretched into the ear seat through the mode of alternating and dismantles or installs like this. And four directions all are fixed a position about the upper and lower of festival fork, and the precision of fixing a position like this is higher than conventional centre gripping location and will be a lot of, and is more stable in processing, and welding precision is promoted by a wide margin. When the slide block 4 slides relative to the top rod 3, the top rod 3 can extend into the stroke slot 411 and push the positioning column 6 to displace towards one side of the stroke slot 411. After the joint yoke is fixed, a shaft on the other side of the central hole of the joint yoke is driven by an air cylinder to be pressed into the central hole of the joint yoke, the shaft can abut against the clamping joint 41 and continuously press the clamping joint 41 to enable the clamping joint to overcome the elastic force of the spring 5 and move towards the sleeve 2 when entering the central hole, the ejector rod 3 can enter the stroke groove 411 under the sliding of the sliding block 4 to abut against the positioning column 6 to limit the displacement of the positioning column along with the clamping joint 41, when one end of the shaft completely enters the central hole of the joint yoke, the speed reducing motor 1 rotates a welding gun on one side of the speed reducing motor 1 to be close to the shaft and be welded with the joint yoke, the joint yoke can only slide along the length direction of the stroke groove 411, the phenomenon of deviation when the shaft extends into the central hole of the joint yoke cannot easily occur, and the positioning.

Arc-shaped chamfer grooves I412 and arc-shaped chamfer grooves II 413 are formed in the two side groove walls of the stroke groove 411 along the length direction of the clamping head 41, and the positioning column 6 can enable the outer peripheral surface of the positioning column to abut against the groove walls of the chamfer grooves I412 or the chamfer grooves II 413 through sliding. The design of chamfer groove one 412 and chamfer groove two 413 makes can comparatively agree with when reference column 6 leans on with the both sides cell wall of the length direction in stroke groove 411, and curved cell wall and the curved outer peripheral face of reference column 6 lean on, makes the wearing and tearing of the outer peripheral face of reference column 6 obtain alleviating like this at the clamping festival fork and welded in-process repeatedly, makes it comparatively agree with the groove width in stroke groove 411 can be by better spacing, and positioning accuracy obtains further improvement. The end surface of the mandril 3 is an arc-shaped surface 32 with the same radian as the groove wall of the first chamfer groove 412. The design of arcwall face 32 also plays and can agree with the outer peripheral face of reference column 6 more when contacting with reference column 6, prevent to damage the outer peripheral face of reference column 6 when slider 4 is gliding, reference column 6 can rotate, can influence reference column 6 by the spacing precision of the width place cell wall of stroke groove 411 when the damage position rotates the groove width place position of stroke groove 411 after its peripheral face damage, make reference column 6 can control and rock the precision that influences the location, so the design of arcwall face 32 can make it agree with more when contacting with reference column 6 outer peripheral face, thereby further increase the location precision.

Example two

The structure and principle of this embodiment are basically the same as those of the first embodiment, except that: in this embodiment, the radial cross section of the top rod 3 is triangular, and the outer circumferential surface thereof is not provided with the protruding rib 31, and the mounting hole 42 of the slide block 4 is triangular in shape adapted to the top rod 3. The arrangement can also play a role of circumferential limit when the mandril 3 extends into the mounting hole 42. The circumferential rotation of the sliding block 4 is limited by the cooperation of the convex rib 31 and the clamping groove 43, and the same technical effect is achieved.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit or ambit of the invention as defined in the appended claims.

Claims

1. The automatic welding device for the steering knuckle fork comprises a speed reducing motor (1) with an output shaft (11), and is characterized by further comprising a sleeve (2) fixed on the output shaft (11) and an ejector rod (3) located in the sleeve (2) and fixedly connected with the output shaft (11) at one end, wherein a sliding block (4) is sleeved on the ejector rod (3), the sliding block (4) is circumferentially fixed with the ejector rod (3), a blocking part is arranged at a port of the sleeve (2), a spring (5) is sleeved outside the ejector rod (3), one end of the spring (5) is pressed against the sliding block (4) to abut against the blocking part, a clamping joint (41) extending out of the sleeve (2) and used for being matched with a center hole of the knuckle fork is further arranged on the sliding block (4), a stroke groove (411) is formed in the clamping joint (41), and the ejector rod (3) can extend into the stroke groove (411), the device further comprises a positioning column (6) arranged in the stroke groove (411) in a penetrating mode, the diameter of the positioning column (6) is slightly smaller than the width of the stroke groove (411), and when the sliding block (4) slides relative to the ejector rod (3), the ejector rod (3) can stretch into the stroke groove (411) and push the positioning column (6) to slide.

2. The automatic steering yoke welding device according to claim 1, wherein a plurality of uniformly distributed convex ribs (31) are arranged on the outer peripheral surface of the ejector rod (3) along the axial direction of the ejector rod, a mounting hole (42) for the ejector rod (3) to extend into and communicate with the stroke groove (411) is formed in the center of the sliding block (4), a clamping groove (43) corresponding to the convex ribs (31) is formed in the inner wall of the mounting hole (42), the ejector rod (3) extends into the mounting hole (42), and the convex ribs (31) are clamped with the clamping groove (43).

3. The automatic steering yoke welding device according to claim 2, characterized in that the lateral side of the sliding block (4) is provided with a raised annular retaining edge (44), the blocking part is a raised edge (21) raised towards the inner side of the sleeve (2), and the sliding block (4) enables the annular retaining edge (44) and the raised edge (21) to be abutted against and axially limited under the action of the elastic force of the spring (5).

4. The automatic steering yoke welding device as claimed in claim 3, wherein the clamping head (41) is provided with a first arc-shaped chamfer groove (412) and a second arc-shaped chamfer groove (413) on the two side groove walls in the length direction of the stroke groove (411), and the positioning column (6) can make the outer peripheral surface of the positioning column abut against the groove walls of the first arc-shaped chamfer groove (412) or the second arc-shaped chamfer groove (413) through sliding.

5. The automatic steering fork welding device according to claim 4, wherein the end surface of the ejector rod (3) is an arc-shaped surface (32) with the same radian as the groove wall of the first chamfer groove (412).

6. An automatic steering yoke welding device according to claim 5, characterized in that a radially raised annular protrusion (61) is arranged on the positioning column (6) outside the stroke slot (411), and the diameter of the annular protrusion (61) is larger than the width of the stroke slot (411).

7. An automatic steering yoke welding device according to claim 6, characterized in that said bayonet joint (41) comprises a head (414) for extending into the yoke central hole and a body (415) between the two lugs of the yoke, said travel slot (411) extending laterally through the body (415).

8. The automatic steering yoke welding device according to claim 7, characterized in that a first cutting groove (416) and a second cutting groove (417) are further formed at the notches at the two sides of the stroke groove (411).

9. The automatic welding device for the steering yoke according to claim 4, 5, 6 or 7, characterized in that a raised guide head (111) is arranged on the output shaft (11), the ejector rod (3) is in threaded connection with the guide head (111), a guide groove (45) is formed in one end surface of the slider (4), one end of the spring (5) extends into the guide groove (45) and is pressed against the groove bottom of the guide groove (45), and the other end of the spring (5) is sleeved outside the guide head (111) and is pressed against the end surface of the output shaft (11).

10. An automatic steering yoke welding device according to claim 8, characterized in that the sleeve (2) has an internal thread on the inside of an end opening, and the sleeve (2) is screwed to the output shaft (11).