Edge rolling head
By designing a piping head with anti-turn parts and pressure adjustment mechanism, the problems of unstable quality and cumbersome pre-pressure adjustment of traditional piping tools are solved, and high-quality piping and simple adjustment are achieved.
Patent Information
- Application Number
- CN202421463087.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-25
- Publication Date
- 2025-05-20
- Estimated Expiration
- 2034-06-25
AI Technical Summary
Traditional piping tools adopt pure rigid structure to cause poor margin quality stability, and pre-pressure adjustment is cumbersome and stepless adjustment cannot be achieved. The roller head is prone to circumferential deflection affecting margin quality.
A piping head including a main body, a connecting flange, a floating head, a roller head and a pressure adjustment mechanism is designed to avoid circumferential deflection through the sliding fit of the anti-rotating member and the first axial groove, and to achieve simple stepless adjustment of the pre-pressure by a combination of a spring, a adjustment block and a adjustment bolt.
The edge quality is significantly improved, the pre-pressure adjustment process is simplified, the circumferential deflection of the roller head is avoided, and the stepless adjustment effect is achieved.
Smart Images
Figure CN222885767U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of hemming tools, and particularly relates to a hemming head. Background Art
[0002] As the last process of the door and hood assembly of a vehicle, the final hemming quality is particularly important. As a key component of the hemming process, the hemming tool plays a decisive role in the hemming quality. The traditional hemming tool adopts a pure rigid structure, resulting in poor stability of the hemming quality. In order to overcome the defects of the traditional hemming tool and meet the requirements of different hemming forces for pre-hemming and final hemming, at present, springs and gaskets are mainly added in the hemming tool, and different pressure values are obtained through the compression amount of the springs.
[0003] When the hemming tool is installed at the factory, a certain amount of preloading is applied to the spring, so that the deformation and stress level of the spring are more controllable during actual use. However, with the attenuation of the spring force during use, the pre-pressure of the spring will also change. Therefore, it is necessary to adjust the pre-pressure. During the pre-pressure adjustment process, the hemming tool needs to be removed from the robot, then the flange and other related components are removed, and finally the compression amount of the spring is adjusted by increasing or decreasing the number of gaskets, so as to realize the adjustment of the pre-pressure size. The adjustment steps are cumbersome and cannot achieve stepless adjustment. In addition, during the process of the robot driving the hemming tool to extrude the workpiece, the main body of the roller head itself is subjected to a certain force, resulting in easy circumferential deflection of the roller head, which is likely to affect the hemming quality. Summary of the Utility Model
[0004] The technical problem to be solved by the utility model is to overcome the deficiencies in the prior art and provide a hemming head with a simple structure design, very simple adjustment of the pre-pressure, and a function of preventing circumferential deflection.
[0005] The technical solution adopted by the utility model to solve its technical problems is: a hemming head, comprising a main body, a connecting flange, a floating head, a roller head and a pressure adjusting mechanism. The main body includes a housing, a connecting sleeve, a connecting shaft and an anti-rotation member. The housing is a hollow cylindrical structure with an open top. The connecting flange is installed at the top end of the housing. The floating head slides through a through hole opened in the middle of the bottom end of the housing. The roller head is installed at the bottom end of the floating head. The connecting sleeve is coaxially installed in the housing. The connecting shaft is coaxially arranged in the connecting sleeve and is slidably matched with the connecting sleeve. The anti-rotation member is installed on the inner wall of the connecting sleeve. The outer wall of the connecting shaft is axially provided with a first axial groove. The anti-rotation member extends into the first axial groove and is slidably matched with the first axial groove. The top end of the connecting shaft is connected to the bottom end of the connecting flange through a pressure adjusting mechanism, and its bottom end is connected to the top end of the floating head.
[0006] Further, the pressure adjusting mechanism includes a spring, a first adjusting block, a second adjusting block and an adjusting bolt. The spring is arranged in a first groove opened at the top end of the connecting shaft, and its top end extends out of the first groove and abuts against the middle part of the second adjusting block. The top end of the spring is sleeved on the bottom end of the second adjusting block. The first adjusting block is arranged in a second groove opened in the middle of the bottom end of the connecting flange. The top end of the second adjusting block extends into the second groove, and its top inclined surface is in sliding fit with the bottom inclined surface of the first adjusting block. The adjusting bolt penetrates the connecting flange radially and is in rotational fit with the connecting flange, and its inner end is in threaded fit with a threaded hole opened in the middle of the first adjusting block.
[0007] Further, a first guiding groove is opened in the middle of the bottom of the second groove, and a second guiding groove is opened in the middle of the top inclined surface of the second adjusting block. The top end of the first adjusting block extends into the first guiding groove and is in sliding fit with the first guiding groove, and its bottom inclined surface extends into the second guiding groove and is in sliding fit with the second guiding groove.
[0008] Further, an anti-rotation plane is formed on the outer wall of the second adjusting block, and a plane wall corresponding to the anti-rotation plane is formed on the side wall of the second groove.
[0009] Further, a notch is opened on the outer wall of the bottom end of the connecting flange, and a card is installed in the notch. There are two cards, which are symmetrically arranged on both sides of the adjusting bolt. An annular groove is opened at the outer end of the adjusting bolt, and the opposite sides of the two cards both extend into the annular groove and are in clearance fit with the annular groove.
[0010] Further, a cover plate is installed at the opening of the notch.
[0011] Further, the roller head includes a base, a wheel shaft, a first bearing, a first roller, a second roller, a first baffle, a calibration needle and a third roller assembly. The base is installed at the bottom end of the floating head. The wheel shaft penetrates the shaft hole at the bottom end of the base horizontally and is connected to the shaft hole through the first bearing. The first roller and the second roller are respectively installed at both ends of the wheel shaft. The first baffle is installed at the left orifice of the shaft hole and is sleeved on the wheel shaft. The top end of the calibration needle is inserted into the bottom end of the base. The third roller assembly is installed at the front side of the base.
[0012] Further, the third roller assembly includes an external connection block, a thumb wheel, a second bearing, a second baffle and a retaining ring. The external connection block is installed at the front side of the base. An installation groove is opened at the bottom end of the external connection block. The rear end of the thumb wheel is installed in the installation groove through the second bearing. The second baffle is installed at the orifice of the installation groove and is sleeved on the thumb wheel. The retaining ring is arranged at the bottom of the installation groove and contacts the second bearing. The rear end of the thumb wheel is connected to the retaining ring, and a pulling groove is opened at the front end of the thumb wheel.
[0013] Further, a disassembly hole is formed on the right side of the base, a reserved hole is formed on the rear side thereof, and a storage hole is formed on the left side of the base.
[0014] Further, an oil nozzle is installed on the connecting flange, and the oil nozzle communicates with the inner cavity of the housing.
[0015] The beneficial effects of the present utility model are as follows:
[0016] (1) Through the sliding fit between the anti-rotation member and the first axial groove, the connecting shaft is restricted to axially move only, thereby avoiding circumferential deflection during the operation of the rolling head; combined with the setting of the pressure adjustment mechanism, the adjustment of the pre-pressure is very simple, without disassembling parts, and stepless adjustment can be achieved, thus significantly improving the edge wrapping quality.
[0017] (2) Through the setting of the first guiding groove and the second guiding groove, the stroke of the first adjusting block is guided so that it can only move axially along the adjusting bolt, avoiding rotation of the first adjusting block under force, thereby ensuring the adjustment effect.
[0018] (3) Through the cooperative setting of the anti-rotation plane and the plane wall, the second adjusting block can only move axially along the connecting shaft, thereby preventing displacement and crosstalk of the second adjusting block in other directions, and further ensuring the adjustment effect. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] The present utility model will be further described below in conjunction with the drawings and embodiments.
[0020] Figure 1 is the structural schematic diagram of the present utility model Figure 1 ;
[0021] Figure 2 is the structural schematic diagram of the present utility model Figure 2 ;
[0022] Figure 3 is Figure 1 the sectional view of the pressure adjustment mechanism in the A-A direction in
[0023] Figure 4 is Figure 1 the sectional view of the rolling head in the A-A direction in
[0024] Figure 5 is Figure 2 the sectional view of the rolling head in the B-B direction in
[0025] Figure 6 is the sectional view of the anti-rotation member in Embodiment 1 of the present utility model;
[0026] Figure 7 is the schematic diagram of the second adjusting block in the present utility model;
[0027] Figure 8 is a schematic view of the first adjustment block in the present utility model;
[0028] Figure 9 is a schematic view of the notch in the present utility model;
[0029] Figure 10 is a schematic view of the flat wall in the present utility model;
[0030] Figure 11 is a schematic view of the card in the present utility model;
[0031] Figure 12 is a rear view of the roller head in the present utility model;
[0032] Figure 13 is a cross-sectional view of the anti-rotation member in Embodiment 2 of the present utility model.
[0033] In the figure: 100, main body; 110, outer shell; 111, through hole; 120, connecting sleeve; 121, second axial groove; 130, connecting shaft; 131, first axial groove; 132, first groove; 140, anti-rotation member; 200, connecting flange; 210, second groove; 211, flat wall; 220, first guiding groove; 230, notch; 300, floating head; 400, roller head; 410, base; 411, shaft hole; 412, disassembly hole; 413, reserved hole; 414, storage hole; 420, wheel shaft; 430, first bearing; 440, first roller; 450, second roller; 460, first baffle; 470, calibration needle; 480, third roller assembly; 481, external connection block; 4811, installation groove; 482, thumb wheel; 4821, pulling groove; 483, second bearing; 484, second baffle; 485, retaining ring; 500, pressure adjustment mechanism; 510, spring; 520, first adjustment block; 521, threaded hole; 530, second adjustment block; 531, second guiding groove; 532, anti-rotation plane; 540, adjusting bolt; 541, annular groove; 600, card; 610, arc-shaped groove; 700, cover plate; 800, oil nozzle. Detailed implementation manners
[0034] Now, the present utility model will be further described with reference to the accompanying drawings. These drawings are all simplified schematic views, which only illustrate the basic structure of the present utility model in a schematic manner, so they only show the components related to the present utility model.
[0035] Embodiment 1
[0036] As Figures 1-6As shown in the figure, a hemming head includes a main body 100, a connecting flange 200, a floating head 300, a rolling head 400 and a pressure adjusting mechanism 500. The main body 100 includes a housing 110, a connecting sleeve 120, a connecting shaft 130 and an anti-rotation member 140. The housing 110 is a hollow cylindrical structure with an open top. The connecting flange 200 is installed at the top end of the housing 110. The floating head 300 slides through a through hole 111 opened in the middle of the bottom end of the housing 110. The rolling head 400 is installed at the bottom end of the floating head 300. The connecting sleeve 120 is coaxially installed inside the housing 110. The connecting shaft 130 is coaxially arranged inside the connecting sleeve 120 and is in sliding fit with the connecting sleeve 120. The anti-rotation member 140 is installed on the inner wall of the connecting sleeve 120. The outer wall of the connecting shaft 130 is axially provided with a first axial groove 131. The anti-rotation member 140 extends into the first axial groove 131 and is in sliding fit with the first axial groove 131. The top end of the connecting shaft 130 is connected to the bottom end of the connecting flange 200 through the pressure adjusting mechanism 500, and its bottom end is connected to the top end of the floating head 300. Through the sliding fit between the anti-rotation member 140 and the first axial groove 131, the connecting shaft 130 is restricted to only move axially, thus avoiding circumferential deflection of the rolling head 400 during operation. Combined with the setting of the pressure adjusting mechanism 500, the adjustment of the pre-pressure is very simple, without disassembling parts, and stepless adjustment can be achieved, thus significantly improving the hemming quality. Specifically, the anti-rotation member 140 is embedded in a second axial groove 121 opened on the inner wall of the connecting sleeve 120, and the anti-rotation member 140 is spherical or cylindrical.
[0037] When the rolling head 400 contacts the workpiece, a reaction force is generated, which is transmitted from the rolling head 400 to the floating head 300 and then to the main body 100. The connecting shaft 130 inside the main body 100 receives the reaction force and generates an axial force and a radial force. Under the action of the axial force, the connecting shaft 130 moves up and down within a set range. Due to the engagement of the anti-rotation member 140 with the first axial groove 131 and the second axial groove 121 respectively, the connecting shaft 130 is prevented from generating circumferential rotation, thus avoiding the change of the trajectory of the rolling head 400 from affecting the hemming quality.
[0038] As Figure 3 , Figure 4 , Figure 7 and Figure 8As shown, the pressure adjustment mechanism 500 includes a spring 510, a first adjustment block 520, a second adjustment block 530, and an adjustment bolt 540. The spring 510 is disposed in a first groove 132 formed at the top end of the connecting shaft 130, and its top end extends out of the first groove 132 and abuts against the middle part of the second adjustment block 530. The top end of the spring 510 is sleeved on the bottom end of the second adjustment block 530. The first adjustment block 520 is disposed in a second groove 210 formed in the middle of the bottom end of the connecting flange 200. The top end of the second adjustment block 530 extends into the second groove 210, and its top inclined surface is in sliding fit with the bottom inclined surface of the first adjustment block 520. The adjustment bolt 540 penetrates the connecting flange 200 in the radial direction and is in rotational fit with the connecting flange 200, and its inner end is in threaded fit with a threaded hole 521 formed in the middle of the first adjustment block 520. When adjusting the compression amount of the spring 510, only the adjustment bolt 540 needs to be rotated. Since the inner end of the adjustment bolt 540 is in threaded fit with the threaded hole 521 in the middle of the first adjustment block 520, the rotational movement of the adjustment bolt 540 is converted into the radial linear movement of the first adjustment block 520. Since the top inclined surface of the second adjustment block 530 is in sliding fit with the bottom inclined surface of the first adjustment block 520, the radial linear movement of the first adjustment block 520 forces the second adjustment block 530 to perform an axial linear movement, thereby realizing the adjustment of the compression amount of the spring 510. It should be noted that since the rotation angle of the adjustment bolt 540 is arbitrary, stepless pressure regulation can be achieved.
[0039] As Figure 3 , Figure 7 and Figure 10 shown, a first guide groove 220 is formed in the middle of the bottom of the second groove 210, and a second guide groove 531 is formed in the middle of the top inclined surface of the second adjustment block 530. The top end of the first adjustment block 520 extends into the first guide groove 220 and is in sliding fit with the first guide groove 220, and its bottom inclined surface extends into the second guide groove 531 and is in sliding fit with the second guide groove 531. Through the arrangement of the first guide groove 220 and the second guide groove 531, the stroke of the first adjustment block 520 is guided so that it can only move axially along the adjustment bolt 540 (i.e., the radial direction of the connecting shaft 130), avoiding the rotation of the first adjustment block 520 under force, thereby ensuring the adjustment effect.
[0040] As Figure 7 and Figure 10 shown, an anti-rotation plane 532 is formed on the outer wall of the second adjustment block 530, and a plane wall 211 corresponding to the anti-rotation plane 532 is formed on the side wall of the second groove 210. Through the cooperative arrangement of the anti-rotation plane 532 and the plane wall 211, the second adjustment block 530 can only move axially along the connecting shaft 130, thereby preventing the second adjustment block 530 from shifting in other directions, and further ensuring the adjustment effect.
[0041] AsFigure 1 , Figure 7 , Figure 9 and Figure 11 As shown in Figure 9 and Figure 11 , a notch 230 is formed in the outer wall at the bottom end of the connecting flange 200. A card 600 is installed in the notch 230. There are two cards 600, which are symmetrically arranged on both sides of the adjusting bolt 540. An annular groove 541 is formed at the outer end of the adjusting bolt 540. The opposite sides of the two cards 600 extend into the annular groove 541 and are in clearance fit with the annular groove 541. With such a design, while not affecting the rotation of the adjusting bolt 540, axial movement of the adjusting bolt 540 is avoided, thereby ensuring the accuracy of pressure regulation. Specifically, arc-shaped grooves 610 are mirror-symmetrically formed in the middle of the opposite sides of the two cards 600. The arc-shaped grooves 610 are adapted to the annular groove 541. A cover plate 700 is installed at the opening of the notch 230 to prevent foreign objects from entering and keep the inside of the notch 230 clean.
[0042] As Figures 1-5 shown, the roller head 400 includes a base 410, a wheel shaft 420, a first bearing 430, a first roller 440, a second roller 450, a first baffle 460, a calibration needle 470 and a third roller assembly 480. The base 410 is installed at the bottom end of the floating head 300. The wheel shaft 420 horizontally penetrates through the shaft hole 411 at the bottom end of the base 410 and is connected to the shaft hole 411 through the first bearing 430. The first roller 440 and the second roller 450 are respectively installed at both ends of the wheel shaft 420. The first baffle 460 is installed at the left orifice of the shaft hole 411 and sleeved on the wheel shaft 420. The top end of the calibration needle 470 is inserted into the bottom end of the base 410. The third roller assembly 480 is installed at the front side of the base 410. Specifically, the first baffle 460 is connected to the left side of the base 410 by screws.
[0043] As Figure 1 , Figure 4 and Figure 5As shown, the third roller assembly 480 includes an external connection block 481, a thumb wheel 482, a second bearing 483, a second baffle 484, and a retaining ring 485. The external connection block 481 is installed on the front side of the base 410. An installation groove 4811 is provided at the bottom end of the external connection block 481. The rear end of the thumb wheel 482 is installed in the installation groove 4811 through the second bearing 483. The second baffle 484 is installed at the notch of the installation groove 4811 and sleeved on the thumb wheel 482. The retaining ring 485 is arranged at the bottom of the installation groove 4811 and contacts the second bearing 483. The rear end of the thumb wheel 482 is connected to the retaining ring 485, and a pulling groove 4821 is provided at its front end. Specifically, the external connection block 481 is connected to the front side of the base 410 by screws, facilitating the replacement of the third roller assembly 480; the second baffle 484 is connected to the external connection block 481 by screws. When replacing the thumb wheel 482 and the second bearing 483, remove the second baffle 484, then insert a screwdriver into the pulling groove 4821 and pull out the screwdriver outward, and the thumb wheel 482 and the second bearing 483 can be taken out as a whole through the retaining ring 485, which is convenient and fast and avoids the risk of the second bearing 483 being unable to be taken out.
[0044] As Figure 2 and Figure 12 shown, a disassembly hole 412 is provided on the right side of the base 410, and a reserved hole 413 is provided on the rear side thereof. A storage hole 414 is provided on the left side of the base 410. When replacing the first bearing 430, remove the first baffle 460, then insert a screwdriver into the disassembly hole 412 to eject the first bearing 430, which is convenient and fast and avoids the risk of the first bearing 430 being unable to be taken out. The provision of the reserved hole 413 facilitates the expansion of other rollers in the future and greatly improves the flexibility of the hemming. The provision of the storage hole 414 stores the calibration needle 470, avoiding interference between the calibration needle 470 and the die car parts during the hemming operation. When TCP calibration is required, take out the calibration needle 470 in the storage hole 414 and then insert it into the bottom end of the base 410. At this time, the storage hole 414 is blocked by a plug. Such a design facilitates the storage of the calibration needle 470. Specifically, there are four disassembly holes 412.
[0045] As Figure 2 shown, an oil nozzle 800 is installed on the connecting flange 200, and the oil nozzle 800 communicates with the inner cavity of the housing 110. Oil is injected into the inner cavity of the housing 110 through the oil nozzle 800, playing a lubricating role.
[0046] Embodiment 2
[0047] This embodiment is improved on the basis of Embodiment 1, and the improvements are as follows: A plurality of first axial grooves 131 are provided and are evenly arranged along the circumferential direction of the connecting shaft 130. Specifically, there are three first axial grooves 131, and there are three corresponding anti-rotation parts 140, as Figure 13 shown.
[0048] When the rolling head 400 contacts the workpiece, a reaction force is generated, and the three anti-rotation members 140 slide axially along the first axial groove 131 respectively, effectively preventing the connecting shaft 130 from rotating circumferentially.
[0049] The above embodiments are only for illustrating the technical concept and features of the present invention, and the purpose is to enable those who are familiar with this technology to understand the content of the present invention and implement it. It cannot be used to limit the protection scope of the present invention. Any equivalent changes or modifications made according to the spirit and essence of the present invention should be covered within the protection scope of the present invention.
Claims
1. A hemming head, characterized in that: The invention comprises a main body (100), a connecting flange (200), a floating head (300), a rolling head (400) and a pressure adjustment mechanism (500); the main body (100) comprises a shell (110), a connecting sleeve (120), a connecting shaft (130) and an anti-rotation member (140); the shell (110) is a hollow cylindrical structure with an opening at the top; the connecting flange (200) is installed at the top of the shell (110); the floating head (300) slides through a through hole (111) provided in the middle of the bottom end of the shell (110); the rolling head (400) is installed at the bottom end of the floating head (300); the connecting sleeve (120) Coaxially installed in the housing (110), the connecting shaft (130) is coaxially arranged in the connecting sleeve (120) and slidingly cooperates with the connecting sleeve (120), the anti-rotation component (140) is installed on the inner wall of the connecting sleeve (120), the outer wall of the connecting shaft (130) is axially provided with a first axial groove (131), the anti-rotation component (140) extends into the first axial groove (131) and slidingly cooperates with the first axial groove (131), the top end of the connecting shaft (130) is connected to the bottom end of the connecting flange (200) through a pressure adjustment mechanism (500), and its bottom end is connected to the top end of the floating head (300).
2. The piping head according to claim 1, characterized in that: The pressure adjustment mechanism (500) comprises a spring (510), a first adjustment block (520), a second adjustment block (530) and an adjusting bolt (540). The spring (510) is arranged in a first groove (132) provided at the top end of the connecting shaft (130), and its top end extends out of the first groove (132) to abut against the middle of the second adjustment block (530). The top end of the spring (510) is sleeved on the bottom end of the second adjustment block (530). The first adjustment block (520) is provided at the bottom end of the second adjustment block (530). 0) is arranged in a second groove (210) opened in the middle of the bottom end of the connecting flange (200), the top end of the second adjusting block (530) extends into the second groove (210), and the top inclined surface of the second adjusting block (530) is slidably matched with the bottom inclined surface of the first adjusting block (520), the adjusting bolt (540) radially penetrates the connecting flange (200) and is rotatably matched with the connecting flange (200), and the inner end of the adjusting bolt is threadedly matched with the threaded hole (521) opened in the middle of the first adjusting block (520).
3. The piping head according to claim 2, characterized in that: A first guide groove (220) is provided in the middle of the groove bottom of the second groove (210), a second guide groove (531) is provided in the middle of the top inclined surface of the second adjustment block (530), the top of the first adjustment block (520) extends into the first guide groove (220) and is slidably matched with the first guide groove (220), and the bottom inclined surface extends into the second guide groove (531) and is slidably matched with the second guide groove (531).
4. The piping head according to claim 2, characterized in that: An anti-rotation plane (532) is formed on the outer wall of the second adjustment block (530), and a plane wall (211) corresponding to the anti-rotation plane (532) is formed on the side wall of the second groove (210).
5. The piping head according to claim 2, characterized in that: A notch (230) is provided on the outer wall of the bottom end of the connecting flange (200), and a card (600) is installed in the notch (230). The card (600) consists of two pieces and is symmetrically arranged on both sides of the adjusting bolt (540). An annular groove (541) is provided on the outer end of the adjusting bolt (540), and the opposite sides of the two pieces of the card (600) extend into the annular groove (541) and are gap-matched with the annular groove (541).
6. The piping head according to claim 5, characterized in that: A cover plate (700) is installed at the opening of the notch (230).
7. The piping head according to claim 1, characterized in that: The roller head (400) comprises a base (410), an axle (420), a first bearing (430), a first roller (440), a second roller (450), a first baffle (460), a calibration needle (470) and a third roller assembly (480). The base (410) is mounted on the bottom end of the floating head (300). The axle (420) transversely passes through the axial hole (411) at the bottom end of the base (410) and is connected to the axial hole (411) through the first bearing (430). The first roller (440) and the second roller (450) are respectively mounted on the two ends of the axle (420). The first baffle (460) is mounted on the left opening of the axial hole (411) and is sleeved on the axle (420). The top end of the calibration needle (470) is plugged into the bottom end of the base (410). The third roller assembly (480) is mounted on the front side of the base (410).
8. The piping head according to claim 7, characterized in that: The third roller assembly (480) comprises an external block (481), a thumb wheel (482), a second bearing (483), a second baffle (484) and a retaining ring (485); the external block (481) is mounted on the front side of the base (410); a mounting groove (4811) is provided at the bottom end of the external block (481); a rear end of the thumb wheel (482) is mounted in the mounting groove (4811) through the second bearing (483); the second baffle (484) is mounted in the notch of the mounting groove (4811) and sleeved on the thumb wheel (482); the retaining ring (485) is arranged at the bottom of the mounting groove (4811) and contacts the second bearing (483); the rear end of the thumb wheel (482) is connected to the retaining ring (485), and a drawing groove (4821) is provided at the front end thereof.
9. The piping head according to claim 7, characterized in that: The right side of the base (410) is provided with a disassembly hole (412), and the rear side thereof is provided with a reserved hole (413); the left side of the base (410) is provided with a storage hole (414).
10. The piping head according to claim 1, characterized in that: An oil nozzle (800) is installed on the connecting flange (200), and the oil nozzle (800) is communicated with the inner cavity of the housing (110).