A double-sided tooth groove forming machine for internal and external teeth of automobile seat headrest support rods

Abstract

The present invention discloses a double-sided tooth groove forming machine for internal and external teeth of a car seat headrest support rod, which relates to the technical field of automobile parts processing equipment. The machine comprises a fixture assembly, a slide seat, a depth adjustment slide, a wheel seat, a roller, and a depth adjustment block. The fixture assembly is provided with a fixing hole and a rolling processing space, the rolling processing space is connected to the upper part of the fixing hole, the slide seat can move in the front-to-back direction, the depth adjustment slide is arranged in the slide seat, and the depth adjustment slide can move in the front-to-back direction relative to the slide seat, the rear end shaft of the wheel seat is connected to the front end of the slide seat, the front end of the wheel seat is located in the rolling processing space, the roller is arranged on the lower side of the front end of the wheel seat, the depth adjustment block is fixed to the front end of the depth adjustment slide, the depth adjustment block is located above the wheel seat, and the lower side of the depth adjustment block is an inclined surface with a higher front and a lower rear. The double-sided tooth grooves are rolled and formed simultaneously, and the relative position of the tooth grooves is very accurate, so the support rod will not be scrapped due to errors in the relative position of the tooth grooves.

Description

Technical Field

[0001] The invention relates to the technical field of automobile parts processing devices, in particular to an internal and external tooth double-sided tooth groove forming machine for a car seat headrest support rod. Background Art

[0002] With the development of the automobile industry, people have higher and higher requirements for the quality of automobiles, and the comfort of automobiles has also received more and more attention from consumers, especially the headrests of automobile seats, which can provide head support for the driver and passenger, so that the driver and passenger can get a comfortable sitting posture. The height adjustment of the headrest is achieved by moving the support rod up and down, and the support rod needs to have a tooth groove. In the existing technology, many support rods are designed with double-sided tooth grooves, which are double internal teeth and one internal tooth and one external tooth. The tooth grooves on the support rod are mostly made by stamping, milling or rolling, but they are all processed in two times. The relative position of the tooth groove on the support rod is not difficult to ensure, which makes the support rod unusable; there are also molded ones, but because one tooth groove requires at least 8-10 wheels, the interchangeability is poor, the cost is high, and the diameter of the support rod is too large and requires special process correction. Summary of the Invention

[0003] To this end, the present invention provides a double-sided tooth groove forming machine for internal and external teeth of a car seat headrest support rod, so as to solve the technical problem that the relative position of the tooth groove on the support rod is difficult to ensure when processing the double-sided tooth groove in the existing processing method.

[0004] In order to achieve the above object, the present invention provides the following technical solutions:

[0005] A double-sided tooth groove forming machine for internal and external teeth of a car seat headrest support rod, comprising:

[0006] A fixture assembly, wherein the fixture assembly is provided with a fixing hole extending in the left-right direction, and a rolling processing space extending in the front-back direction is provided above the fixing hole, and the rolling processing space is connected to the upper part of the fixing hole;

[0007] The slide assembly is located at the rear side of the clamp assembly, and the slide assembly includes a slide seat, a depth adjustment slide, a wheel seat, a roller and a depth adjustment block. The slide seat can move in the front and rear directions, and the depth adjustment slide is arranged in the slide seat, and the depth adjustment slide can move in the front and rear directions relative to the slide seat. The rear end shaft of the wheel seat is connected to the front end of the slide seat, and the front end of the wheel seat is located in the rolling processing space. The roller is arranged at the lower side of the front end of the wheel seat, and the depth adjustment block is fixed to the front end of the depth adjustment slide, and the depth adjustment block is located above the wheel seat, and the lower side surface of the depth adjustment block is an inclined surface with a higher front and a lower rear;

[0008] Among them, the fixing hole, rolling processing space, wheel seat and depth adjustment block are all provided with two, one above and one below.

[0009] Furthermore, a plurality of rollers are provided at the front end of the wheel seat, and the plurality of rollers are spaced apart along the left-right direction.

[0010] Furthermore, the depth adjustment slide is connected to the slide seat through a slide rail and a slider.

[0011] Furthermore, it also includes a variable frequency reducer and a connecting plate, the output shaft of the variable frequency reducer is fixed with an eccentric wheel, the output shaft of the eccentric wheel is axially connected to the rear end of the connecting plate, and the front end of the connecting plate is axially connected to the slide seat.

[0012] Furthermore, the slide assembly also includes a servo electric cylinder, which is fixed to the rear end of the slide seat, and the front end of the telescopic shaft of the servo electric cylinder is connected to the depth adjustment slide.

[0013] Furthermore, the clamp assembly includes two clamps and a pre-compressed compression spring arranged between the two clamps. Two semi-fixed holes are provided on each side of the two clamps facing each other. When the two clamps are abutted due to extrusion, the four semi-fixed holes form two fixed holes.

[0014] Furthermore, it also includes a clamp rotating table assembly, which includes a clamp rotating table body, a main clamping cylinder, a clamp accessory and the clamp assembly, the rear end of the clamp rotating table body is provided with a clamp installation space extending in the left and right directions, and the upper and lower sides of the rear end of the clamp installation space are provided with clamp limit blocks, the clamp assembly is arranged in the clamp installation space, and the rear end of the clamp assembly is abutted against the clamp limit blocks, the main clamping cylinder is fixed to the front end of the clamp rotating table body, the telescopic rod of the main clamping cylinder is set backward, the clamp accessory can be slidably arranged in the clamp installation space in the front and rear directions, and the clamp accessory is located between the clamp assembly and the telescopic rod of the main clamping cylinder, and the rear side of the clamp accessory is provided with a machined retreat groove, and the two clamps can be abutted against each other by the extension and contraction of the telescopic rod of the main clamping cylinder.

[0015] Furthermore, the clamp rotating table assembly also includes a secondary clamp oil cylinder and a secondary clamp bevel iron, the secondary clamp oil cylinder is fixed to the left or right side of the clamp rotating table body, the secondary clamp bevel iron is wedge-shaped, the secondary clamp bevel iron is arranged in the clamp installation space, and the secondary clamp bevel iron is located between the clamp accessory and the telescopic rod of the main clamp oil cylinder, the secondary clamp bevel iron is connected to the telescopic rod of the secondary clamp oil cylinder through a Y-shaped joint and a pin shaft.

[0016] Furthermore, the clamp rotating table assembly also includes a rotation angle disk, which is arranged at the bottom of the clamp rotating table body, and the clamp rotating table body and the rotation angle disk are axially connected through a rotating shaft. The bottom plate of the clamp rotating table body is provided with an arc groove, the center of the arc groove is collinear with the axis of the rotating shaft, and a hexagon socket bolt is provided in the arc groove, and the hexagon socket bolt is screwed together with the rotation angle disk, and a pointed protrusion is provided at the front end of the bottom plate of the clamp rotating table body, and a rotation scale line is provided on the upper surface of the rotation angle disk at a position relative to the pointed protrusion.

[0017] Furthermore, it also includes a bed, the variable frequency reducer is fixed to the upper rear part of the bed, the slide assembly is arranged in the middle part of the upper part of the bed, and the fixture rotary table assembly is arranged at the upper front part of the bed, wherein the slide seat is connected to the bed through a guide rail and a slider, and the rotation angle disk is connected to the bed through a movable base plate.

[0018] The present invention has the following advantages:

[0019] The two legs of the support rod are respectively inserted into the two fixing holes of the clamp. At this time, the legs are equivalent to being placed horizontally, and their upper parts are in the rolling processing space; the position of the depth adjustment block in the front and rear directions is adjusted. Since the lower side of the depth adjustment block is a slope that is higher in the front and lower in the back, the upward movement distance of the front end of the wheel seat and the roller can be adjusted and limited; the slide seat moves back and forth, and the roller rolls the legs exposed in the rolling processing space to form teeth; by adjusting the front and rear positions of the depth adjustment block, the feed amount of the roller can be adjusted, thereby changing the depth of the teeth; since the rolling processing space is connected to the upper part of the fixing hole, double-sided teeth, one inside and one outside, are formed on the two legs of the support rod; most importantly, the double-sided teeth are rolled at the same time, and the relative position of the teeth is very accurate, and the support rod will not be scrapped due to errors in the relative position of the teeth. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the embodiments or the description of the prior art. Obviously, the drawings described below are merely exemplary, and those skilled in the art can, without inventive effort, derive other implementation drawings based on the provided drawings.

[0021] The structures, proportions, sizes, etc. illustrated in this specification are intended solely to complement the contents disclosed herein and to facilitate understanding and reading by persons skilled in the art. They are not intended to limit the conditions under which the present invention may be implemented and therefore have no substantive technical significance. Any structural modifications, changes in proportions, or adjustments in sizes, without affecting the efficacy and objectives of the present invention, shall remain within the scope of the technical contents disclosed herein.

[0022] Figure 1 A schematic structural diagram of a double-sided tooth groove forming machine for an automobile seat headrest support rod with internal and external teeth provided by a specific embodiment of the present invention;

[0023] Figure 2 A schematic structural diagram of the internal and external tooth double-sided groove forming machine for a car seat headrest support rod provided by a specific embodiment of the present invention, with the cover removed;

[0024] Figure 3 A schematic structural diagram of a slide assembly of a double-sided tooth groove forming machine for an internal and external tooth of a car seat headrest support rod provided by a specific embodiment of the present invention;

[0025] Figure 4 A schematic structural diagram of another view of the slide assembly of the double-sided tooth groove forming machine for the internal and external teeth of the headrest support rod of an automobile seat provided by a specific embodiment of the present invention;

[0026] Figure 5 A schematic diagram of the connection relationship between the variable frequency reducer and the motion slide connecting seat of the double-sided tooth groove forming machine for the internal and external teeth of the car seat headrest support rod provided by the specific embodiment of the present invention;

[0027] Figure 6 A schematic structural diagram of a fixture rotary table assembly of a double-sided tooth groove forming machine for an internal and external tooth of a car seat headrest support rod provided by a specific embodiment of the present invention;

[0028] Figure 7 A schematic structural diagram of a fixture assembly of a fixture rotary table assembly of a double-sided tooth groove forming machine for internal and external teeth of a car seat headrest support rod provided by a specific embodiment of the present invention;

[0029] Figure 8 A schematic diagram of the connection relationship between the auxiliary clamp oil cylinder and the auxiliary clamp wedge of the fixture rotary table assembly of the double-sided tooth groove forming machine for the internal and external teeth of the automobile seat headrest support rod provided by the specific embodiment of the present invention;

[0030] Figure 9 A schematic diagram showing the positional relationship between the rotation angle disk and the fixture rotating table body of the fixture rotating table assembly of the double-sided tooth groove forming machine for the internal and external teeth of the automobile seat headrest support rod provided by a specific embodiment of the present invention;

[0031] Figure 10The electronic control principle diagram of the double-sided tooth groove forming machine for the internal and external teeth of the car seat headrest support rod provided by the specific embodiment of the present invention;

[0032] Figure 11 A schematic structural diagram of a depth adjustment slide of a double-sided tooth groove forming machine for internal and external teeth of a car seat headrest support rod provided by a specific embodiment of the present invention;

[0033] Figure 12 A schematic structural diagram of a wheel seat of a double-sided tooth groove forming machine for an internal and external tooth of a headrest support rod of an automobile seat provided by a specific embodiment of the present invention;

[0034] Figure 13 A schematic structural diagram of a depth adjustment block of a double-sided tooth groove forming machine for an internal and external tooth of a car seat headrest support rod provided by a specific embodiment of the present invention;

[0035] Figure 14 The rotating angle plate of the double-sided tooth groove forming machine for the internal and external teeth of the car seat headrest support rod provided by the specific embodiment of the present invention;

[0036] Figure 15 This is a structural schematic diagram of the fixture rotating table main body of the automobile seat headrest support rod internal and external tooth double-sided tooth groove forming machine provided by a specific embodiment of the present invention.

[0037] In the figure: 100-bed, 101-cover, 200-frequency converter, 201-eccentric wheel, 202-connecting plate, 300-slide assembly, 301-slide seat, 302-depth adjustment slide, 303-wheel seat, 304-roller, 305-depth adjustment block, 306-servo cylinder, 307-guide rail, 308-slider, 309-size height equalization block, 310-cylinder seat, 311-floating joint, 312-motion slide connection seat, 400-fixture rotary table assembly, 401-fixture assembly, 402-moving base plate, 403 -Rotation angle disk, 404-Clamp rotation table body, 405-Main clamp cylinder, 406-Clamp accessories, 407-Auxiliary clamp cylinder, 408-Auxiliary clamp oblique iron, 409-Fixed hole, 410-Clamp, 411-Pressure plate, 412-Rotation shaft, 413-Arc groove, 414-Point protrusion, 415-Rotation scale line, 416-Clamp limit block, 417-Y-type joint, 418-Pin shaft, 500-PLC main control board, 501-Depth travel switch detection block, 502-Depth feed switch seat, 503-Rolling switch, 504-Photoelectric switch. DETAILED DESCRIPTION

[0038] The following describes the implementation of the present invention using specific embodiments. Those skilled in the art will readily understand the other advantages and benefits of the present invention from the disclosure herein. Obviously, the embodiments described are only a portion of the present invention, not all of it. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without inventive effort are intended to fall within the scope of protection of the present invention.

[0039] The terms "upper", "lower", "left", "right", "middle", etc. used in this specification are only for the convenience of description and are not intended to limit the scope of the present invention. Changes or adjustments to their relative relationships should be regarded as within the scope of the present invention without substantially changing the technical content.

[0040] like Figure 1-15 As shown, this embodiment provides an internal and external tooth double-sided tooth groove forming machine for a car seat headrest support rod, comprising a bed 100 and a frequency conversion reducer 200 fixed to the upper rear part of the bed 100, a slide assembly 300 arranged in the middle of the upper side of the bed 100, a fixture rotary table assembly 400 arranged at the upper front part of the bed 100, and a PLC main control board 500 for controlling the movement of the slide assembly 300 and the fixture rotary table assembly 400, wherein the implementation scheme using the PLC main control board 500 for control can refer to the existing automatic control technology.

[0041] The output shaft of the variable frequency reducer 200 is fixed with an eccentric wheel 201. The eccentric wheel 201 is circular, and the output shaft of the variable frequency reducer 200 is coaxially arranged in the center of the eccentric wheel 201, and the two cannot rotate relative to each other. The side of the eccentric wheel 201 away from the variable frequency reducer 200 is provided with an output shaft, and the axis of the output shaft of the eccentric wheel 201 is parallel to the axis of the output shaft of the variable frequency reducer 200 but not colinear. The rear end of the connecting plate 202 is sleeved on the output shaft of the eccentric wheel 201, and the two can rotate relative to each other. The front end of the connecting plate 202 is axially connected to the slide assembly 300, see below for details. When the variable frequency reducer 200 rotates, the slide assembly 300 can be moved in the front and rear directions through the action of the eccentric wheel 201 and the connecting plate 202. Part of the variable frequency reducer 200 and the eccentric wheel 201 and the connecting plate 202 are all located in the cover 101 of the bed 100, which improves the safety factor during use.

[0042] The slide assembly 300 includes a slide base 301, a depth adjustment slide 302, a wheel base 303, rollers 304, a depth adjustment block 305, and a servo cylinder 306. The slide base 301 is connected to the bed 100 via guide rails 307 and sliders 308. When the sliders 308 are fixed to the bottom of the slide base 301, the top of the bed 100 is fixed to the guide rails 307. Conversely, when the guide rails 307 are fixed to the bottom of the slide base 301, the sliders 308 are fixed to the top of the bed 100, thereby ensuring the movement of the slide base 301. A movable slide connection base 312 is provided at the lower rear end of the slide base 301, and the front end of the connecting plate 202 is axially connected to the movable slide connection base 312. A follow-up depth travel switch detection block 501 is provided on the left or right side of the slide seat 301, and a depth feed switch seat 502 is provided at the corresponding position of the bed 100. A photoelectric switch 504 (omitted in the structural diagram) is installed at the front and rear ends of the depth feed switch seat 502. The slide seat 301 reciprocates once, and the slide seat 301 senses the depth travel switch detection block 501 once when it moves forward to the front end and backward to the rear end. The photoelectric switch 504 sends a signal to the PLC main control board 500 once. Every time the PLC main control board 500 receives a signal from the photoelectric switch 504, it controls the servo electric cylinder 306 to push the depth adjustment slide 302 forward once. In this way, the slide seat 301 reciprocates once, which can make the roller 304 roll the support leg twice, thereby improving processing efficiency. The depth adjustment slide 302 is connected to the slide base 301 via guide rails 307 and sliders 308. The connection is similar to the connection between the slide base 301 and the bed 100, ensuring the movement of the depth adjustment slide 302. The guide rails 307 extend in the front-to-back direction, ensuring the movement of the slide base 301 and the depth adjustment slide 302. Furthermore, the guide rails 307 and sliders 308 are both high-precision to ensure the machining accuracy of the tooth grooves. The rear end of the wheel base 303 is axially connected to the front end of the slide base 301, ensuring that the front end of the wheel base 303 can swing. The front end of the wheel base 303 is located within the rolling processing space of the fixture assembly 401, and the roller 304 is located on the lower side of the front end of the wheel base 303. The depth adjustment block 305 is fixed to the front end of the depth adjustment slide 302 and is located above the wheel seat 303. The lower side of the depth adjustment block 305 is an inclined surface that is higher in the front and lower in the back. During rolling, this inclined surface contacts the upper edge of the front end of the wheel seat 303, thereby applying a downward force to the roller 304 and ensuring rolling. As the depth adjustment block 305 moves forward, the space available for the front end of the wheel seat 303 to lift upward decreases, thereby ensuring the downward feed of the roller 304. Because the two legs of the same rod need to be rolled simultaneously, two wheel seats 303 are provided in this embodiment, one above and one below. Each wheel seat 303 is equipped with multiple rollers 304 at the front end, and the multiple rollers 304 are spaced apart along the left and right directions.Each wheel seat 303 has a depth adjustment block 305 above it; a height-conforming block 309 is located between the two depth adjustment blocks 305 and is also fixed to the front end of the depth adjustment slide 302. A cylinder seat 310 is located at the rear end of the slide seat 301. A servo cylinder 306 is fixed to this seat. The front end of the telescopic shaft of the servo cylinder 306 is connected to the depth adjustment slide 302 via a floating joint 311. The servo cylinder 306 is a conventional device with a linear actuator driven by a servo motor, similar to a linear motor, but driven by a servo motor. The majority of the slide assembly 300 is also located within the housing 101, enhancing safety during use.

[0043] The fixture rotating platform assembly 400 includes a fixture assembly 401 , a movable base plate 402 , a rotation angle plate 403 , a fixture rotating platform body 404 , a main clamping oil cylinder 405 , a fixture attachment 406 , a secondary clamping oil cylinder 407 and a secondary clamping wedge 408 .

[0044] The fixture assembly 401 is provided with a fixing hole 409 extending in the left-right direction. The diameter of the fixing hole 409 is the same as or slightly smaller than the diameter of the leg of the support rod to be processed. A rolling processing space extending in the front-to-back direction is provided above the fixing hole 409. In this embodiment, the rolling processing space is a rectangular through-hole. The rolling processing space is connected to the upper portion of the fixing hole 409. Since the leg is horizontal or nearly horizontal at this time, the upper half of the leg is exposed within the rolling processing space. There are two fixing holes 409 and two rolling processing spaces, one above and one below, corresponding to the wheel seat 303 and the depth adjustment block 305. In this embodiment, the clamp assembly 401 includes two clamps 410 and a pre-compressed compression spring arranged between the two clamps 410. Two semi-fixed holes are provided on each side of the two clamps 410 facing each other. When the two clamps 410 are abutted due to extrusion, the four semi-fixed holes form two fixed holes 409; under the action of the compression spring, the two clamps 410 are separated, which is convenient for inserting the support legs into the fixing holes 409 or removing the support legs from the fixing holes 409. When fixing, the two clamps 410 need to be pressed tightly, which is mainly completed by the main clamping cylinder 405 and the auxiliary clamping cylinder 407.

[0045] The movable base plate 402 is provided with a waist-shaped hole extending in the left-right direction and is connected to the bed 100 via bolts passing through the waist-shaped hole. The rotating angle plate 403 is provided with a waist-shaped hole extending in the front-back direction and is connected to the movable base plate 402 via bolts passing through the waist-shaped hole. A pressure plate 411 is provided on each side of the rotating angle plate 403. The upper edge of the pressure plate 411 presses on the upper surface of the rotating angle plate 403. The pressure plate 411 is fixed to the movable base plate 402 via bolts. The clamp rotating table body 404 is arranged on the upper side of the rotating angle disk 403 and is axially connected to the rotating angle disk 403 through a rotating shaft 412; the bottom plate of the clamp rotating table body 404 is provided with an arc groove 413, the center of the arc groove 413 is collinear with the axis of the rotating shaft 412, and a hexagon socket bolt is provided in the arc groove 413, which is screwed together with the rotating angle disk 403, and a pointed protrusion 414 is provided at the front end of the bottom plate of the clamp rotating table body 404, and a rotation scale line 415 is provided on the upper surface of the rotating angle disk 403 at a position relative to the pointed protrusion 414.

[0046] The rear end of the fixture rotating platform body 404 is provided with a fixture installation space extending in the left-right direction. In this embodiment, the fixture installation space is a rectangular through-hole with an opening at the rear end. Fixture limit blocks 416 are provided on the upper and lower sides of the rear end of the fixture installation space. The fixture assembly 401 is disposed in the fixture installation space, and the rear end of the fixture assembly 401 abuts against the fixture limit blocks 416. The main clamping cylinder 405 is fixed to the front end of the fixture rotating platform body 404. The telescopic rod of the main clamping cylinder 405 is disposed rearward. The fixture attachment 406 can be slidably disposed in the fixture installation space in the front-to-back direction. The fixture attachment 406 is located between the fixture assembly 401 and the telescopic rod of the main clamping cylinder 405. A machined retreat groove is provided on the rear side of the fixture attachment 406. The telescopic rod of the main clamping cylinder 405 can be extended and retracted to allow the two clamping plates 410 to abut against each other. The auxiliary clamp cylinder 407 is fixed to the left or right side of the clamp rotating table body 404, the auxiliary clamp bevel iron 408 is wedge-shaped, the auxiliary clamp bevel iron 408 is arranged in the clamp installation space, and the auxiliary clamp bevel iron 408 is located between the clamp accessory 406 and the telescopic rod of the main clamp cylinder 405, and the auxiliary clamp bevel iron 408 is connected to the telescopic rod of the auxiliary clamp cylinder 407 through the Y-shaped joint 417 and the pin shaft 418.

[0047] Step 1: Turn on the machine, and the variable frequency reducer 200 rotates, causing the slide seat 301 to reciprocate in the front-to-back direction. Step 2: Insert the two legs of the support rod into the two fixing holes 409 of the clamp assembly 401, and press the rolling switch 503. Step 3: The PLC main control board 500 receives the electrical signal from the rolling switch 503 and, within a certain time (this time is set by the PLC main control board 500), controls the secondary clamp cylinder 407 to operate, pushing the clamp plate 410 to clamp the leg through the secondary clamp bevel 408. The PLC main control board 500 then controls the main clamp cylinder 405 to operate, pushing the clamp plate 410 to clamp the leg through the clamp attachment 406. The timing is completed by the time set by the PLC main control board 500. In step 4, the photoelectric switch 504 installed on the depth feed switch seat 502 starts working, and the PLC main control board 500 receives the electrical signal of the photoelectric switch 504. The PLC main control board 500 controls the servo electric cylinder 306 to push the depth adjustment slide 302 forward, thereby moving the depth adjustment block 305 forward to ensure the feed amount of each rolling process. In step 5, step 4 is repeated multiple times until the total feed amount reaches the preset target, thereby completing the rolling process of the tooth groove. After reaching the target, the servo electric cylinder 306 reacts, and the main clamping cylinder 405 and the auxiliary clamping cylinder 407 react to remove the processed support rod. Repeat steps 2-5 to process the next support rod. Among them, the rolling switch 503, the photoelectric switch 504, the main clamping cylinder 405, the auxiliary clamping cylinder 407, and the servo electric cylinder 306 are all electrically connected to the PLC main control board 500.

[0048] The two legs of the support rod are respectively inserted into the two fixing holes 409 of the clamp. At this time, the legs are equivalent to being placed horizontally, and their upper parts are in the rolling processing space; adjusting the position of the depth adjustment block 305 in the front and rear directions, since the lower side surface of the depth adjustment block 305 is a slanted surface with a higher front and a lower back, the upward movement distance of the front end of the wheel seat 303 and the roller 304 can be adjusted and limited; the slide seat 301 moves back and forth, and the roller 304 rolls the legs exposed in the rolling processing space to form a tooth groove; adjusting the front and rear position of the depth adjustment block 305 can adjust the feed amount of the roller 304, thereby changing the depth of the tooth groove; since the rolling processing space is connected to the upper part of the fixing hole 409, a double-sided tooth groove, one inside and one outside, is formed on the two legs of the support rod; most importantly, the double-sided tooth grooves are rolled at the same time, and the relative position of the tooth grooves is very accurate, and the support rod will not be scrapped due to errors in the relative position of the tooth grooves. A single wheel base 303, equipped with multiple rollers 304, allows simultaneous machining of different slots in the same leg. This significantly improves the efficiency of machining the tooth grooves of the support rods by allowing simultaneous machining of both legs. Some tooth grooves are perpendicular to the legs, while others are non-perpendicular (referred to as having an inclination angle). When machining two legs with identical spacing (in this case, the fixture assembly 401 does not need to be replaced) but the tooth grooves have an inclination angle, the fixture rotating table body 404 can be rotated a certain angle. This operation is very simple, and most importantly, does not require changing different equipment. The rotation angle can be precisely controlled using the protrusion 414 and the rotating scale 415, ensuring the accuracy of the inclination angle.

[0049] Although the present invention has been described in detail above using general descriptions and specific embodiments, it will be apparent to those skilled in the art that modifications and improvements may be made thereto. Therefore, such modifications and improvements, without departing from the spirit of the present invention, are intended to be within the scope of protection claimed herein.

Claims

1. A double-sided tooth groove forming machine for the internal and external teeth of the car seat headrest support rod, characterized in that: include: A fixture assembly, wherein the fixture assembly is provided with a fixing hole extending in the left-right direction, and a rolling processing space extending in the front-back direction is provided above the fixing hole, and the rolling processing space is connected to the upper part of the fixing hole; The slide assembly is located at the rear side of the clamp assembly, and the slide assembly includes a slide seat, a depth adjustment slide, a wheel seat, a roller and a depth adjustment block. The slide seat can move in the front and rear directions, and the depth adjustment slide is arranged in the slide seat, and the depth adjustment slide can move in the front and rear directions relative to the slide seat. The rear end shaft of the wheel seat is connected to the front end of the slide seat, and the front end of the wheel seat is located in the rolling processing space. The roller is arranged at the lower side of the front end of the wheel seat, and the depth adjustment block is fixed to the front end of the depth adjustment slide, and the depth adjustment block is located above the wheel seat, and the lower side surface of the depth adjustment block is an inclined surface with a higher front and a lower rear; Among them, the fixing hole, rolling processing space, wheel seat and depth adjustment block are each provided with two, one above and one below; The clamp assembly includes two clamps and a pre-compressed compression spring arranged between the two clamps. Two semi-fixed holes are respectively provided on the opposite sides of the two clamps. When the two clamps are abutted due to extrusion, the four semi-fixed holes form two fixed holes.

2. The double-sided tooth groove forming machine for the internal and external teeth of the car seat headrest support rod according to claim 1, characterized in that: A plurality of rollers are provided at the front end of the wheel seat, and the plurality of rollers are spaced apart along the left-right direction.

3. The double-sided tooth groove forming machine for the internal and external teeth of the car seat headrest support rod according to claim 1, characterized in that: The depth adjustment slide is connected to the slide seat through a slide rail and a slider.

4. The double-sided tooth groove forming machine for the internal and external teeth of the car seat headrest support rod according to any one of claims 1 to 3, characterized in that: It also includes a variable frequency reducer and a connecting plate. The output shaft of the variable frequency reducer is fixed with an eccentric wheel. The output shaft of the eccentric wheel is axially connected to the rear end of the connecting plate. The front end of the connecting plate is axially connected to the slide seat.

5. The double-sided tooth groove forming machine for the internal and external teeth of the car seat headrest support rod according to claim 4, characterized in that: The slide assembly also includes a servo electric cylinder, which is fixed to the rear end of the slide seat, and the front end of the telescopic shaft of the servo electric cylinder is connected to the depth adjustment slide.

6. The double-sided tooth groove forming machine for the internal and external teeth of the car seat headrest support rod according to claim 5, characterized in that: The cam is secured to the rear of the frame and has a locking mechanism which allows the cam to move relative to the locking mechanism and to engage with the locking mechanism when the cam is engaged.

7. The double-sided tooth groove forming machine for the internal and external teeth of the car seat headrest support rod according to claim 6, characterized in that: The clamp rotating table assembly also includes a secondary clamp oil cylinder and a secondary clamp bevel iron. The secondary clamp oil cylinder is fixed to the left or right side of the clamp rotating table body. The secondary clamp bevel iron is wedge-shaped. The secondary clamp bevel iron is arranged in the clamp installation space, and the secondary clamp bevel iron is located between the clamp attachment and the telescopic rod of the main clamp oil cylinder. The secondary clamp bevel iron is connected to the telescopic rod of the secondary clamp oil cylinder through a Y-shaped joint and a pin shaft.

8. The double-sided tooth groove forming machine for the internal and external teeth of the car seat headrest support rod according to claim 7, characterized in that: The clamp rotating table assembly also includes a rotation angle disk, which is arranged at the bottom of the clamp rotating table body. The clamp rotating table body and the rotation angle disk are axially connected to the rotation angle disk through a rotating shaft. The bottom plate of the clamp rotating table body is provided with an arc groove, the center of the arc groove is collinear with the axis of the rotating shaft, and a hexagon socket bolt is provided in the arc groove, and the hexagon socket bolt is screwed together with the rotation angle disk. A pointed protrusion is provided at the front end of the bottom plate of the clamp rotating table body, and a rotation scale line is provided on the upper surface of the rotation angle disk at a position relative to the pointed protrusion.

9. The double-sided tooth groove forming machine for the internal and external teeth of the car seat headrest support rod according to claim 8, characterized in that: It also includes a bed, the variable frequency reducer is fixed to the upper rear part of the bed, the slide assembly is arranged in the middle part of the upper part of the bed, and the fixture rotary table assembly is arranged at the upper front part of the bed, wherein the slide seat is connected to the bed through a guide rail and a slider, and the rotation angle disk is connected to the bed through a movable base plate.

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