Metal fastener cleaning equipment

Abstract

The utility model relates to the technical field of fastener maintenance, and discloses metal fastener cleaning equipment which comprises a supporting base, a feeding ultrasonic cleaning part and a roller rotating cleaning conveying part, and supporting legs are fixedly installed on the outer wall of the bottom of the supporting base. The driving motor drives the cleaning roller to rotate, the spiral conveying blades in the cleaning roller play a key role, and along with rotation of the roller, the spiral conveying blades can play a role in stirring and continuously turn over metal fasteners, so that the fasteners roll in cleaning liquid in all directions, each corner can be in the cleaning liquid, and the cleaning effect is good. The fasteners orderly push the fasteners to move forwards in the axial direction of the roller, the cleaning process and the conveying process are seamlessly connected, the supporting bottom blocks and the auxiliary rolling wheels are rotated, the cleaning roller can stably rotate through up-down cooperation, it is ensured that vibration and deviation are reduced when the cleaning roller rotates at a high speed, abrasion to equipment parts due to unstable operation is effectively reduced, and the service life of the cleaning roller is prolonged. The service life of equipment is prolonged.

Description

TECHNICAL FIELD

[0001] The utility model relates to fastener maintenance technical field, concretely is a kind of metal fastener cleaning equipment. BACKGROUND

[0002] In today's era of global industrialization, metal fasteners, as the "key connecting components" of various industries, play an indispensable role in many high-precision fields such as aerospace, automobile manufacturing, mechanical equipment, shipbuilding, etc. From the screws of a precision instrument to the high-strength bolts of a large bridge, their quality and cleanliness directly affect the safety, reliability and service life of the entire product or project.

[0003] Traditional metal fastener cleaning equipment has the following problems: low cleaning efficiency, unable to meet the needs of mass production; unstable cleaning quality, difficult to ensure that each fastener is fully cleaned; traditional cleaning methods often lack effective conveying mechanisms, resulting in low cleaning efficiency and damage or loss of fasteners during cleaning.

[0004] To solve the above problems, the present application provides a new type of metal fastener cleaning equipment, which realizes efficient and stable cleaning of metal fasteners by combining ultrasonic cleaning and drum rotation cleaning. The equipment also has the advantages of simple structure, easy operation and low maintenance cost, which can meet the needs of mass production and improve the production efficiency and quality stability of enterprises. SUMMARY

[0005] To solve the above problems, the present application provides a new type of metal fastener cleaning equipment, which realizes efficient and stable cleaning of metal fasteners by combining ultrasonic cleaning and drum rotation cleaning. The equipment also has the advantages of simple structure, easy operation and low maintenance cost, which can meet the needs of mass production and improve the production efficiency and quality stability of enterprises.

[0006] To achieve the above purpose, the utility model provides the following technical scheme: a metal fastener cleaning equipment, comprising a support base, an inlet ultrasonic cleaning part, a drum rotation cleaning and conveying part, the bottom outer wall of the support base is fixedly installed with support legs, the bottom outer wall of the support leg is fixedly installed with support pad block;The inlet ultrasonic cleaning part is arranged on the top of support base;The drum rotation cleaning and conveying part is arranged on the top of support base;The drum rotation cleaning and conveying part is arranged in the inlet ultrasonic cleaning part.

[0007] Preferably, the feeding ultrasonic cleaning part specifically comprises: a mounting cavity, which is opened in the inner part of the support base; an ultrasonic transducer, which is fixedly installed on the inner wall of the mounting cavity; an ultrasonic cleaning tank, which is fixedly installed on the outer wall of the top of the support base; a drain valve pipe, which is arranged on one side of the support base; and a feeding fixing block, which is fixedly installed on the outer wall of the ultrasonic cleaning tank.

[0008] The ultrasonic cleaning tank is arranged, which cooperates with the feeding hopper, the drum rotating cleaning conveying part and other components to realize the cleaning process. The fastener entering from the feeding hopper is first subjected to preliminary ultrasonic purification in the ultrasonic cleaning tank to preliminarily remove most of the dirt, thereby reducing the burden of the subsequent drum rotating cleaning conveying part for further cleaning. Meanwhile, the cleaning liquid in the ultrasonic cleaning tank is continuously disturbed under the action of ultrasonic waves, which can better cooperate with the spiral conveying blade in the subsequent drum cleaning, so that the fastener is continuously subjected to uniform and strong cleaning action in the tumbling and advancing process, thereby greatly shortening the overall cleaning time and improving the production efficiency.

[0009] Preferably, the ultrasonic wave output ends of the ultrasonic transducer are movably penetrated through the inner wall of the mounting cavity and the bottom outer wall of the ultrasonic cleaning tank and extend into the interior of the ultrasonic cleaning tank, and one end of the drain valve pipe is movably penetrated through the outer wall of the support base and extends into the interior of the mounting cavity.

[0010] Preferably, one end of the drain valve pipe is communicatively provided with a connecting elbow, the other end of the connecting elbow is movably penetrated through the inner wall of the mounting cavity and the bottom outer wall of the ultrasonic cleaning tank and extends into the interior of the ultrasonic cleaning tank, the top of the feeding fixing block is fixedly provided with a feeding hopper, the interior of the feeding fixing block is provided with a feeding groove, and the feeding groove is in communication with the feeding hopper.

[0011] Preferably, the drum rotating cleaning conveying part specifically comprises: a drawer sliding groove, which is opened in the outer wall of one side of the support base; a discharging fixing block, which is fixedly installed on the outer wall of the top of the support base; a discharging groove, which is opened in the interior of the discharging fixing block; a cleaning drum, which is arranged in the interior of the ultrasonic cleaning tank; rotating support bottom blocks, which are equidistantly fixedly installed on the inner wall bottom of the ultrasonic cleaning tank; and fixed support blocks, which are equidistantly fixedly installed on the top outer wall of the ultrasonic cleaning tank.

[0012] Preferably, the interior of the drawer sliding groove is slidably connected with a collecting drawer, the discharging groove is in communication with the drawer sliding groove, the inner wall of the cleaning drum is fixedly installed with a spiral conveying blade, the inner wall of the cleaning drum is fixedly installed with a fixing support, one end of the cleaning drum is provided with a discharging hopper, the discharging hopper is arranged on the top of the discharging groove, the outer wall of the discharging fixing block is fixedly installed with a motor fixing frame, and the interior of the motor fixing frame is fixedly installed with a driving motor.

[0013] The driving motor is arranged in cooperation with other components of the cleaning conveying part, and the driving motor drives the cleaning drum to rotate, and the spiral conveying blades on the inner wall of the cleaning drum play a key role, and the spiral conveying blades orderly push the fasteners preliminarily purified in the ultrasonic cleaning box to the discharge hopper direction according to the specific spiral line design, so that the fasteners are ensured to have enough tumbling cleaning time in the cleaning drum, and the conveying rhythm is controlled, the cleaning and conveying steps are seamlessly connected, and the overall cleaning efficiency is greatly improved.

[0014] Preferably, the output end of the driving motor is fixedly connected with a rotating rod, one end of the rotating rod is movably penetrated through the outer wall of the discharge fixing block and extends to the inside of the cleaning drum, and the other end of the rotating rod is fixedly connected with the outer wall of the fixed support.

[0015] Preferably, the inside of the circular port is fixedly installed with a shaft rod, the outer wall of the shaft rod is movably sleeved with a rotating auxiliary roller, the rotating auxiliary roller is provided with an annular groove, the outer wall of the cleaning drum is equidistantly fixedly sleeved with an annular block, the annular block is slidably connected with the rotating sliding groove, and the annular block is matched with the annular groove.

[0016] The rotating auxiliary roller plays a key role in assisting the rotation of the cleaning drum when the driving motor is started, and the rotating auxiliary roller plays a key role in assisting the rotation of the cleaning drum when the driving motor is started.

[0017] The utility model provides a metal fastener cleaning equipment, has the following beneficial effects:

[0018] (1), the utility model discloses a core component ultrasonic transducer of feeding ultrasonic cleaning part is installed in the installation cavity inner wall of support base, and its ultrasonic wave output end is accurately penetrated to the inside of ultrasonic cleaning tank. When the ultrasonic cleaning function is started, the ultrasonic wave produces innumerable micro cavitation bubbles in the cleaning liquid, and these bubbles release strong energy when breaking instantaneously, can penetrate into the tiny gap of metal fastener, the thread groove and the dirt such as all kinds of oil stains, rust, chippings on the surface, the drain valve pipe of ultrasonic cleaning tank bottom is communicated to the installation cavity with the connecting elbow pipe, and this design is convenient for discharging the cleaning liquid containing dirt in time.

[0019] (2), the utility model discloses a drive motor is rotated with the cleaning cylinder, and the spiral conveying blade in its inside plays the key role, with the rotation of the cylinder, the spiral conveying blade can play the role of stirring, and the metal fastener is continuously turned over, and the fastener is rolled all -round in the cleaning fluid, and every corner can be in the cleaning fluid, and the fastener orderly promotes the fastener to go forward along the cylinder shaft, and the cleaning and conveying process are seamlessly connected, and the rotary support bottom block and auxiliary gyro wheel are rotated, and the cleaning cylinder can be stably rotated in the cooperation of up and down, ensure that the cleaning cylinder reduces the vibration and the deviation when high -speed rotating, effectively reduce the abrasion of the equipment component caused by the unstable operation, prolong the service life of equipment. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is the overall structure front perspective view of the utility model;

[0021] Figure 2 It is the partial sectional view of the feeding ultrasonic cleaning part of the utility model;

[0022] Figure 3 It is the partial view of the cylinder rotation cleaning conveying part of the utility model;

[0023] Figure 4 It is the utility model Figure 3 The structure enlarged schematic view of A.

[0024] In the drawing: 1 support base, 2 support leg, 3 feeding ultrasonic cleaning part, 311 installation cavity, 312 ultrasonic transducer, 313 feeding fixed block, 314 feeding hopper, 315 feeding groove, 316 ultrasonic cleaning tank, 317 connecting elbow, 318 drain valve pipe, 4 cylinder rotation cleaning conveying part, 411 drawer sliding slot, 412 discharge fixed block, 413 discharge groove, 414 spiral conveying blade, 415 cleaning cylinder, 416 discharge hopper, 417 drive motor, 418 motor fixing frame, 419 rotating rod, 4111 fixed support, 4112 rotating support bottom block, 4113 rotating sliding slot, 4114 annular block, 4115 fixed support block, 4116 shaft rod, 4117 rotating auxiliary gyro wheel, 4118 annular groove. DETAILED DESCRIPTION

[0025] The technical scheme in the embodiments of the utility model will be described clearly and completely in conjunction with the drawings of the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the ordinary skill in the art without creative labor belong to the protection scope of the utility model.

[0026] Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0027] Example 1:

[0028] A preferred embodiment of the metal fastener cleaning device provided by this utility model is, for example... Figures 1-4 As shown: A metal fastener cleaning device includes a support base 1, an ultrasonic cleaning unit 3, and a rotating drum cleaning conveyor 4. Support legs 2 are fixedly installed on the bottom outer wall of the support base 1, and support pads are fixedly installed on the bottom outer wall of the support legs 2. The ultrasonic cleaning unit 3 is located on the top of the support base 1. The rotating drum cleaning conveyor 4 is located on the top of the support base 1 and is located inside the ultrasonic cleaning unit 3.

[0029] The feeding ultrasonic cleaning unit 3 specifically includes: a mounting cavity 311, which is opened inside the support base 1; an ultrasonic transducer 312, which is fixedly installed on the inner wall of the mounting cavity 311; an ultrasonic cleaning chamber 316, which is fixedly installed on the top outer wall of the support base 1; a drain valve pipe 318, which is set on one side of the support base 1; and a feeding fixing block 313, which is fixedly installed on the outer wall of the ultrasonic cleaning chamber 316.

[0030] The ultrasonic output end of the ultrasonic transducer 312 moves through the inner wall of the mounting cavity 311 and the bottom outer wall of the ultrasonic cleaning box 316, and extends into the interior of the ultrasonic cleaning box 316. One end of the drain valve pipe 318 moves through the outer wall of the support base 1 and extends into the interior of the mounting cavity 311.

[0031] One end of the drain valve pipe 318 is connected to a connecting bend 317. The other end of the connecting bend 317 movably passes through the inner wall of the mounting cavity 311 and the bottom outer wall of the ultrasonic cleaning box 316, extending into the interior of the ultrasonic cleaning box 316. A feeding hopper 314 is fixedly installed on the top of the feeding fixing block 313. A feeding groove 315 is opened inside the feeding fixing block 313, and the feeding groove 315 is connected to the feeding hopper 314.

[0032] In this embodiment, the metal fasteners to be cleaned are poured into the feed hopper 314 at the top of the feed fixing block 313. The fasteners enter the ultrasonic cleaning chamber 316 through the feed groove 315. At this time, the feed ultrasonic cleaning unit 3 starts to work. The ultrasonic transducer 312 converts electrical energy into ultrasonic waves and radiates ultrasonic waves into the cleaning chamber, causing the cleaning fluid to generate a cavitation effect, performing preliminary cleaning on the fasteners, loosening the surface dirt, and penetrating deep into the fine gaps, thread grooves, and various oil stains, rust, debris and other dirt on the surface of the metal fasteners.

[0033] Embodiment two:

[0034] On the basis of embodiment one, the preferable embodiment of the metal fastener cleaning equipment provided by the utility model is as shown in the figure: Figures 1-4 The rotating cleaning conveying part 4 of the rotating cleaning drum specifically comprises: a drawer sliding groove 411 provided on one side outer wall of the support base 1; a discharging fixed block 412 fixedly installed on the top outer wall of the support base 1; a discharging groove 413 provided in the inside of the discharging fixed block 412; a cleaning drum 415 arranged in the inside of the ultrasonic cleaning box 316; rotating support bottom blocks 4112 fixedly installed at equal intervals on the inner wall bottom of the ultrasonic cleaning box 316; and fixed support blocks 4115 fixedly installed at equal intervals on the top outer wall of the ultrasonic cleaning box 316.

[0035] The inside of the drawer sliding groove 411 is slidably connected with a collecting drawer, the discharging groove 413 is communicated with the drawer sliding groove 411, the inner wall of the cleaning drum 415 is fixedly installed with a spiral conveying blade 414, the inner wall of the cleaning drum 415 is fixedly installed with a fixed support 4111, one end of the cleaning drum 415 is provided with a discharging hopper 416 communicated with a pipe, the discharging hopper 416 is arranged on the top of the discharging groove 413, the outer wall of the discharging fixed block 412 is fixedly installed with a motor fixing frame 418, and the inside of the motor fixing frame 418 is fixedly installed with a driving motor 417.

[0036] The other end of the rotating rod 419 is movably penetrated through the outer wall of the discharging fixed block 412 and extends into the inside of the cleaning drum 415, the other end of the rotating rod 419 is fixedly connected with the outer wall of the fixed support 4111, rotating sliding grooves 4113 are provided on the rotating support bottom blocks 4112, and round openings are provided on the fixed support blocks 4115.

[0037] The inside of the round opening is fixedly installed with a shaft rod 4116, the outer wall of the shaft rod 4116 is movably sleeved with a rotating auxiliary roller 4117, the rotating auxiliary roller 4117 is provided with an annular groove 4118, the outer wall of the cleaning drum 415 is fixedly sleeved with annular blocks 4114 at equal intervals, the annular blocks 4114 are slidably connected with the rotating sliding grooves 4113, and the annular blocks 4114 are matched with the annular grooves 4118.

[0038] In the process of the embodiment, the driving motor 417 of the drum rotating cleaning conveying part 4 is started, the motor output end drives the rotating rod 419 to rotate, the other end of the rotating rod 419 is fixedly connected with the outer wall of the fixed support 4111 inside the cleaning drum 415, so as to drive the cleaning drum 415 to rotate, with the rotation of the drum, the spiral conveying blade 414 on the inner wall continuously flips the metal fastener, so that the metal fastener rolls in all directions in the cleaning liquid, and further removes the remaining stubborn stains; on the other hand, the rotating slide groove 4113 on the rotating support bottom block 4112 and the annular block 4114 on the outer wall of the cleaning drum 415 are pushed to move along the axial direction of the drum, the rotating auxiliary roller 4117 on the shaft rod 4116 in the round mouth of the top fixed support block 4115 is sleeved, the annular groove 4118 of the rotating auxiliary roller 4117 is matched with the annular block 4114, the rotating auxiliary roller 4117 gives auxiliary support to the top of the drum, and the rotating auxiliary roller 4117 guarantees stable operation. The up and down cooperation enables the cleaning drum to rotate stably, ensures that the cleaning drum reduces vibration and deviation during high-speed rotation, effectively reduces the wear of equipment parts caused by unstable operation, and prolongs the service life of the equipment.

[0039] Working principle: in use:

[0040] Step one: check whether each part of the equipment is intact, ensure that the support legs 2 and the support pads at the bottom of the support base 1 are stably placed, and there is no looseness. Observe whether the appearance of the ultrasonic transducer 312 in the feeding ultrasonic cleaning part 3 is damaged, whether the line connection is normal, whether the valve of the drain valve pipe 318 is in the closed state, whether the connecting elbow pipe 317 is connected tightly without leakage, and at the same time, check whether the collection drawer installed in the drawer slide groove 411 of the drum rotating cleaning conveying part 4 is in place, whether the cleaning drum 415 can rotate freely, and whether the driving motor 417 and its transmission parts such as the rotating rod 419 are fixed firmly;

[0041] Step two: pour the metal fastener to be cleaned into the feeding hopper 314 on the top of the feeding fixed block 313, and the fastener enters the ultrasonic cleaning tank 316 through the feeding groove 315, at this time, the feeding ultrasonic cleaning part 3 starts to work, the ultrasonic transducer 312 converts electric energy into ultrasonic waves, radiates ultrasonic waves into the cleaning tank, makes the cleaning liquid produce cavitation effect, and preliminarily cleans the fastener and loosens the surface dirt;

[0042] Step three: turn on the driving motor 417 of the rotating cleaning conveying part 4, the motor output end drives the rotating rod 419 to rotate, the other end of the rotating rod 419 is fixedly connected with the outer wall of the fixed support 4111 in the cleaning drum 415, so as to drive the cleaning drum 415 to rotate, with the rotation of the drum, the spiral conveying blade 414 in the inner wall continuously flips the metal fastener, so that the metal fastener rolls in all directions in the cleaning liquid, and further removes the remaining stubborn stains; on the other hand, the rotating slide groove 4113 on the rotating support bottom block 4112 and the annular block 4114 on the outer wall of the cleaning drum 415 are slidably connected, which provides bottom support and rotation guide for the drum, and ensures stable rotation. The rotating auxiliary roller 4117 sleeved on the shaft rod 4116 in the circular port of the top fixed support block 4115, the annular groove 4118 of the rotating auxiliary roller 4117 is matched with the annular block 4114, which gives auxiliary support to the top of the drum, and ensures stable operation;

[0043] Step four: the metal fastener cleaned is pushed by the spiral conveying blade 414 to the discharge hopper 416 at one end of the cleaning drum 415, the discharge hopper 416 is accurately arranged at the top of the discharge slot 413 in the discharge fixed block 412, the fastener slides through the discharge slot 413 and falls into the collection drawer in the drawer slide groove 411 connected with the discharge slot, and the collection is completed. The operator can pull out the collection drawer regularly to clean the cleaned fastener, and prepare for the next cleaning operation;

[0044] Step five: when a batch of metal fasteners is cleaned, if the cleaning liquid needs to be replaced, the drain valve pipe 318 is opened, and the cleaning liquid in the ultrasonic cleaning box 316 is discharged through the connecting elbow pipe 317 and the drain valve pipe 318.

[0045] Finally, it should be pointed out that: the above only for the preferred embodiments of the utility model, and does not limit the utility model, although the utility model is described in detail with reference to the foregoing embodiments, for those skilled in the art, it still can modify the technical scheme recorded in the foregoing embodiments, or make equivalent replacement to part of the technical features. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the utility model should be included in the protection scope of the utility model.

Claims

1. A metal fastener cleaning apparatus comprising a support base (1), an ultrasonic cleaning section (3) for feeding, and a drum rotating cleaning and conveying section (4), characterized in that, The bottom outer wall of the support base (1) is fixedly installed with support legs (2), and the bottom outer wall of the support legs (2) is fixedly installed with support pads; the feeding ultrasonic cleaning part (3) is arranged at the top of the support base (1); the roller rotating cleaning conveying part (4) is arranged at the top of the support base (1); and the roller rotating cleaning conveying part (4) is arranged inside the feeding ultrasonic cleaning part (3).

2. A metal fastener cleaning apparatus as defined in claim 1, wherein, The feeding ultrasonic cleaning part (3) specifically comprises: The mounting cavity (311) is arranged inside the support base (1); The ultrasonic transducer (312) is fixedly installed on the inner wall of the mounting cavity (311); The ultrasonic cleaning box (316) is fixedly installed on the top outer wall of the support base (1); The drain valve pipe (318) is arranged on one side of the support base (1); The feeding fixing block (313) is fixedly installed on the outer wall of the ultrasonic cleaning box (316).

3. A metal fastener cleaning apparatus as defined in claim 2, wherein, The ultrasonic wave output ends of the ultrasonic transducer (312) are movably penetrated through the inner wall of the mounting cavity (311) and the bottom outer wall of the ultrasonic cleaning box (316) and extend into the ultrasonic cleaning box (316); and one end of the drain valve pipe (318) is movably penetrated through the outer wall of the support base (1) and extends into the mounting cavity (311).

4. A metal fastener cleaning apparatus as defined in claim 3, wherein One end of the drain valve pipe (318) is communicatively provided with the connecting elbow (317), the other end of the connecting elbow (317) is movably penetrated through the inner wall of the mounting cavity (311) and the bottom outer wall of the ultrasonic cleaning box (316) and extends into the ultrasonic cleaning box (316), the top of the feeding fixing block (313) is fixedly installed with the feeding hopper (314), the inner part of the feeding fixing block (313) is provided with the feeding groove (315), and the feeding groove (315) is in communication with the feeding hopper (314).

5. The metal fastener cleaning apparatus of claim 1, wherein, The roller rotating cleaning conveying part (4) specifically comprises: The drawer sliding groove (411) is arranged on one side of the outer wall of the support base (1); The discharging fixing block (412) is fixedly installed on the top outer wall of the support base (1); The discharging groove (413) is arranged inside the discharging fixing block (412); The cleaning roller (415) is arranged inside the ultrasonic cleaning box (316); The rotating support bottom block (4112) is fixedly installed at equal intervals on the inner wall bottom of the ultrasonic cleaning box (316); The fixed support block (4115) is fixedly installed at equal intervals on the top outer wall of the ultrasonic cleaning box (316).

6. A metal fastener cleaning apparatus as defined in claim 5, wherein, The inside sliding connection of the drawer sliding groove (411) is provided with a collection drawer, the discharge chute (413) is communicated with the drawer sliding groove (411), the inner wall of the cleaning roller (415) is fixedly provided with a spiral conveying blade (414), the inner wall of the cleaning roller (415) is fixedly provided with a fixed support (4111), one end of the cleaning roller (415) is provided with a discharge hopper (416), the discharge hopper (416) is arranged at the top of the discharge chute (413), the outer wall of the discharge fixing block (412) is fixedly provided with a motor fixing frame (418), and the inside of the motor fixing frame (418) is fixedly provided with a driving motor (417).

7. A metal fastener cleaning apparatus as defined in claim 6, wherein, The output end of the driving motor (417) is fixedly connected with a rotating rod (419), the other end of the rotating rod (419) is movably penetrated through the outer wall of the discharge fixing block (412) and extends to the inside of the cleaning roller (415), the other end of the rotating rod (419) is fixedly connected with the outer wall of the fixed support (4111), the rotating support bottom block (4112) is provided with a rotating sliding groove (4113), and the fixed support block (4115) is provided with a round mouth.

8. A metal fastener cleaning apparatus as defined in claim 7, wherein, The inside of the round mouth is fixedly provided with a shaft rod (4116), the outer wall of the shaft rod (4116) is movably provided with a rotating auxiliary roller (4117), the rotating auxiliary roller (4117) is provided with an annular groove (4118), the outer wall of the cleaning roller (415) is equidistantly fixedly provided with an annular block (4114), the annular block (4114) is slidably connected with the rotating sliding groove (4113), and the annular block (4114) is matched with the annular groove (4118).

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