On-pole adjustable installation foundation of wireless temperature measurement module

Abstract

The invention relates to an on-pole adjustable mounting foundation of a wireless temperature measurement module, which is mounted on a telegraph pole, is used for arranging the wireless temperature measurement module to measure the temperature of a point to be measured, and comprises a holding pole assembly, a rotating swing arm, a rotating assembly, a locking assembly and a limiting stop lever, the holding pole assembly comprises a holding pole base plate, a locking terminal and a U-shaped hoop; the rotary swing arm is rotatably arranged on the rear end face of the holding pole base plate; the rotating assembly is used for driving the rotating swing arm to rotate anticlockwise; the locking assembly is used for locking the rotational degree of freedom of the rotary swing arm; the limiting stop lever is arranged on the lower left portion of the rear end face of the holding pole base plate and used for limiting anticlockwise rotation of the rotary swing arm. The on-pole adjustable installation foundation of the wireless temperature measurement module is convenient to install and can adapt to telegraph poles with diameter sizes within a certain range; the locking assembly can lock the angle of the rotary swing arm, and angle change of the rotary swing arm under interference of wind factors or other factors is avoided.

Description

Technical Field

[0001] The present application relates to the technical field of electric power equipment, and in particular to an adjustable pole-mounted mounting base for a wireless temperature measurement module. Background Art

[0002] In order to ensure the safety of power transmission, it is necessary to conduct temperature measurement and monitoring on live conductor connection parts in the transmission line that are prone to thermal defects, such as tension clamps, jumper connections, connection pipes, drainage plates, etc. The prior art usually fixes a simple bracket on a pole or crossarm with bolts, and then installs and arranges a wireless temperature measurement module at the end of the bracket, but it has the following problems. Due to the different positions of the temperature points to be measured, the bracket needs to be adaptively designed in a variety of styles. Therefore, it is necessary to design an installation base that can effectively adjust and firmly lock the position and posture, so that the wireless temperature measurement module can be smoothly approached to the temperature point to be measured after being arranged on the installation base. Summary of the invention

[0003] An adjustable pole mounting base for a wireless temperature measurement module is installed on a utility pole. The adjustable mounting base is used to arrange the wireless temperature measurement module to measure the temperature of a temperature measurement point, and includes:

[0004] A pole holding assembly includes a pole holding base plate, a locking terminal, and a U-shaped holding hoop; the pole holding base plate includes a rectangular plate body, the left and right sides of the rectangular plate body are respectively provided with a through hole that penetrates in the front-to-back direction, the inner wall of the through hole is provided with a limiting convex ring, the middle part of the rear end surface of the rectangular plate body is provided with a fixed circular tube, the inner wall of the fixed circular tube is provided with an inner convex ring, and the outer wall of the fixed circular tube is uniformly provided with anti-rotation holes in the circumferential direction;

[0005] The locking terminals are provided with two, each through-hole is provided with a locking terminal, and the locking terminals include a terminal shaft rotatably provided in the corresponding through-hole, an internal threaded hole provided at the front end of the terminal shaft, and a limiting ring groove provided on the outer wall of the terminal shaft and cooperating with a limiting convex ring;

[0006] The U-shaped clamp comprises a semicircular arc portion, and an external threaded rod is respectively arranged on the left and right sides of the semicircular arc portion, and the external threaded rod is screwed with the corresponding internal threaded hole.

[0007] A rotating swing arm is rotatably arranged on the rear end face of the pole base plate, and the stop end of the rotating swing arm is used to install a wireless temperature measurement module; the rotating swing arm includes a disc base, a central circular hole formed at the center of the front end face of the disc base and sleeved on the outer wall of the fixed circular tube, a damping core shaft arranged in front of the bottom of the central circular hole and inserted into the fixed circular tube, a stopping outer ring formed in front of the outer wall of the damping core shaft and stopped in front of the convex ring in the tube, and a swing arm body arranged on the side of the disc base.

[0008] The rotating assembly is arranged in the rotating swing arm and is used to drive the rotating swing arm to rotate counterclockwise; the rotating assembly comprises:

[0009] The central chamber comprises a narrow diameter rear hole arranged at the rear end of the damping mandrel, a wide diameter circular cavity arranged in front of the narrow diameter rear hole, a mandrel ring groove arranged on the outer wall of the damping mandrel, and connecting side holes uniformly distributed outside the wide diameter circular cavity and connected to the mandrel ring groove in the circumferential direction, a transmission gear shaft is respectively arranged in each connecting side hole, and a transmission gear is rotatably arranged on each transmission gear shaft;

[0010] The central assembly includes a central gear rotatably disposed in the wide diameter circular cavity and meshing with the transmission gear, a central thin shaft disposed behind the central gear and passing through the narrow diameter rear hole, and an adjustment knob disposed behind the central thin shaft;

[0011] The outer ring gear is rotatably disposed in the annular groove of the spindle and meshes with the transmission gear;

[0012] A torsion spring is wound between the outer ring gear and the fixed circular tube, one end of the torsion spring is connected to the outer wall of the outer ring gear and the other end is connected to the inner wall of the fixed circular tube;

[0013] The locking assembly includes a locking through hole that passes through the central gear, the central thin shaft, and the adjustment knob in the front-to-back direction, a synchronous cross bar arranged on the inner wall of the locking through hole, a telescopic core shaft slidably arranged in the locking through hole, and a synchronous cross hole arranged in the telescopic core shaft and plugged with the synchronous cross bar. The locking assembly also includes a locking blind hole arranged in front of the wide-diameter circular cavity, a fixed locking ring arranged in the locking blind hole and accommodating the telescopic core shaft to pass through, a sliding locking ring arranged at the front end of the telescopic core shaft and locked with the fixed locking ring, and a locking compression spring arranged in the locking blind hole in front of the telescopic core shaft.

[0014] The locking assembly is arranged in the rotating swing arm and is used to lock the rotational freedom of the rotating swing arm; the locking assembly includes a worm gear ring cavity arranged outside the central circular hole of the disc base, an annular wide cavity formed on the outer edge of the front end of the worm gear ring cavity, a worm socket penetrating the disc base in the up and down directions and connected with the worm gear ring cavity, radial sockets uniformly distributed in the disc base and connected with the annular wide cavity, a driving worm rotatably arranged in the worm socket, a driven worm rotatably arranged in the worm gear ring cavity and meshing with the driving worm, and a plane threaded disk arranged at the front end of the driven worm gear and rotatably matched with the annular wide cavity. The locking assembly also includes a radial sliding rod slidably arranged in the corresponding radial socket, and a driven plug arranged at the lower end of the radial sliding rod and plug-matched with the plane threaded disk.

[0015] A limit stop bar is arranged at the lower left side of the rear end surface of the holding rod base plate to limit the counterclockwise rotation of the rotating swing arm.

[0016] Furthermore: the front end surface of the fixed lock ring and the rear end surface of the sliding lock ring are evenly distributed circumferentially with anti-slip lock teeth arranged in the radial direction.

[0017] Beneficial effects:

[0018] The adjustable pole mounting base of the wireless temperature measurement module described in this case is easy to install and can adapt to poles with diameters within a certain range: rotate the terminal round shaft and the internal threaded hole to drive the external threaded rod and the semi-circular arc portion to move backward relative to the pole clamping base plate until the U-shaped clamp clamps the pole tightly.

[0019] The case describes an adjustable mounting base on a pole for a wireless temperature measurement module. The rotating swing arm normally keeps a counterclockwise rotation and stops above the limit stop rod. The position of the wireless temperature measurement module can be adjusted by rotating the rotating swing arm to make it close to the temperature point to be measured.

[0020] The case describes an adjustable pole-mounted mounting base for a wireless temperature measurement module, wherein the locking assembly can lock the angle of a rotating swing arm to prevent the angle of the rotating swing arm from changing due to interference from wind or other factors. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of installing the installation foundation on a utility pole.

[0022] Figure 2 Schematic diagram of an embodiment of the installation base.

[0023] Figure 3 1 is a top view of an embodiment of the mounting base.

[0024] Figure 4 It is a cross-sectional view of an embodiment of the mounting base.

[0025] Figure 5 It is a cross-sectional view of an embodiment of the pole holding assembly.

[0026] Figure 6 It is a cross-sectional view of an embodiment of the rotating swing arm, rotating component, and locking assembly.

[0027] Figure 7 yes Figure 4 A magnified schematic diagram of the first state in part A.

[0028] Figure 8 yes Figure 4 A magnified schematic diagram of the second state in part A.

[0029] Fig. 9 It is a cross-sectional view of the mounting base in the locked position of the rotating swing arm (U-shaped clamp is omitted).

[0030] Fig.10It is a cross-sectional view of the mounting base in the free posture of the rotating swing arm (without the U-shaped clamp).

[0031] Fig.11 yes Fig.10 Section view of the B-B section.

[0032] In the figure:

[0033] 1. Pole assembly;

[0034] 11. Pole base plate, 111. Rectangular plate body, 112. Through hole, 113. Position limiting convex ring, 114. Fixed round tube, 115. Inner convex ring of the tube, 116. Anti-rotation jack;

[0035] 12. Locking terminal, 121. Terminal round shaft, 122. Internal thread hole, 123. Limiting ring groove;

[0036] 13. U-shaped clamp, 131. semicircular arc portion, 132. external threaded rod;

[0037] 2. Rotating swing arm, 21. Disc base, 22. Central circular hole, 23. Damping mandrel, 24. Stop outer ring, 25. Swing arm body;

[0038] 3. Rotating assembly;

[0039] 31. Central chamber, 311. Narrow diameter rear cavity, 312. Wide diameter circular cavity, 313. Mandrel ring groove, 314. Connecting side hole, 315. Transmission gear shaft, 316. Transmission gear;

[0040] 32. Central assembly, 321. Central gear, 322. Central thin shaft, 323. Adjustment knob;

[0041] 33. Outer ring gear;

[0042] 34. Torsion spring;

[0043] 35. Locking assembly, 351. Locking through hole, 352. Synchronous cross bar, 353. Telescopic mandrel, 354. Synchronous cross hole, 355. Locking blind hole, 356. Fixed locking ring, 357. Sliding locking ring, 358. Locking compression spring;

[0044] 4. Locking assembly, 41. Worm gear ring cavity, 42. Annular wide cavity, 43. Worm screw socket, 44. Radial socket, 45. Active worm, 46. Driven worm gear, 47. Plane threaded disk, 48. Radial slide rod, 49. Driven plug;

[0045] 5. Limit lever;

[0046] 7. Wireless temperature measurement module;

[0047] 8. Adjustable mounting base;

[0048] 9. Electric pole. DETAILED DESCRIPTION

[0049] An adjustable mounting base on a pole of a wireless temperature measurement module is installed on a utility pole 9. The adjustable mounting base 8 is used to arrange a wireless temperature measurement module 7 to measure the temperature of a temperature measurement point, including:

[0050] The pole assembly 1 includes a pole base plate 11, a locking terminal 12, and a U-shaped clamp 13; the pole base plate 11 includes a rectangular plate body 111, and the left and right sides of the rectangular plate body 111 are respectively provided with a through hole 112 that penetrates in the front-to-back direction, and the inner wall of the through hole 112 is provided with a limiting convex ring 113, and the middle part of the rear end surface of the rectangular plate body 111 is provided with a fixed circular tube 114, and the inner wall of the fixed circular tube 114 is provided with an inner tube convex ring 115, and the outer wall of the fixed circular tube 114 is uniformly distributed with anti-rotation holes 116 in the circumferential direction;

[0051] The locking terminals 12 are provided with two, each through-hole 112 is provided with a locking terminal 12, and the locking terminal 12 comprises a terminal round shaft 121 rotatably provided in the corresponding through-hole 112, an internal threaded hole 122 provided at the front end of the terminal round shaft 121, and a limiting ring groove 123 provided on the outer wall of the terminal round shaft 121 and cooperating with the limiting convex ring 113;

[0052] The U-shaped clamp 13 includes a semicircular arc portion 131 , and an external threaded rod 132 is respectively disposed on the left and right sides of the semicircular arc portion 131 . The external threaded rod 132 is threadedly connected to the corresponding internal threaded hole 122 .

[0053] The rotating swing arm 2 is rotatably arranged on the rear end face of the holding pole base plate 11, and the stop end of the rotating swing arm 2 is used to install the wireless temperature measurement module 7; the rotating swing arm 2 includes a disc base 21, a central circular hole 22 formed at the center of the front end face of the disc base 21 and sleeved on the outer wall of the fixed circular tube 114, a damping core shaft 23 arranged in front of the bottom of the central circular hole 22 and inserted into the fixed circular tube 114, a stopping outer ring 24 formed in front of the outer wall of the damping core shaft 23 and stopped in front of the convex ring 115 in the tube, and a swing arm body 25 arranged on the side of the disc base 21.

[0054] The rotating assembly 3 is arranged in the rotating swing arm 2 and is used to drive the rotating swing arm 2 to rotate counterclockwise; the rotating assembly 3 includes:

[0055] The central chamber 31 comprises a narrow diameter rear hole 311 arranged at the rear end of the damping mandrel 23, a wide diameter circular cavity 312 arranged in front of the narrow diameter rear hole 311, a mandrel annular groove 313 arranged on the outer wall of the damping mandrel 23, and connecting side holes 314 uniformly distributed outside the wide diameter circular cavity 312 and connected to the mandrel annular groove 313 in the circumferential direction, each connecting side hole 314 is respectively provided with a transmission gear shaft 315, and each transmission gear shaft 315 is rotatably provided with a transmission gear 316;

[0056] The central assembly 32 includes a central gear 321 rotatably disposed in the wide diameter circular cavity 312 and meshing with the transmission gear 316, a central thin shaft 322 disposed behind the central gear 321 and passing through the narrow diameter rear hole 311, and an adjustment knob 323 disposed behind the central thin shaft 322;

[0057] The outer ring gear 33 is rotatably disposed in the spindle ring groove 313 and meshes with the transmission gear 316;

[0058] A torsion spring 34 is wound between the outer ring gear 33 and the fixed circular tube 114, with one end of the torsion spring 34 connected to the outer wall of the outer ring gear 33 and the other end connected to the inner wall of the fixed circular tube 114;

[0059] The locking assembly 35 includes a locking through hole 351 that passes through the central gear 321, the central thin shaft 322, and the adjustment knob 323 in the front-to-back direction, a synchronous cross bar 352 arranged on the inner wall of the locking through hole 351, a telescopic core shaft 353 slidably arranged in the locking through hole 351, and a synchronous cross hole 354 arranged in the telescopic core shaft 353 and plugged with the synchronous cross bar 352. The locking assembly 35 also includes a locking blind hole 355 arranged in front of the wide-diameter circular cavity 312, a fixed locking ring 356 arranged in the locking blind hole 355 and accommodating the telescopic core shaft 353 to pass through, a sliding locking ring 357 arranged at the front end of the telescopic core shaft 353 and locked with the fixed locking ring 356, and a locking compression spring 358 arranged in the locking blind hole 355 and located in front of the telescopic core shaft 353.

[0060] The locking assembly 4 is arranged in the rotating swing arm 2 and is used to lock the rotational freedom of the rotating swing arm 2; the locking assembly 4 includes a worm gear ring cavity 41 arranged outside the central circular hole 22 of the disc base 21, an annular wide cavity 42 formed on the outer edge of the front end of the worm gear ring cavity 41, a worm plug hole 43 that passes through the disc base 21 in the up and down directions and is connected to the worm gear ring cavity 41, radial plug holes 44 that are circumferentially uniformly distributed in the disc base 21 and are connected to the annular wide cavity 42, a driving worm 45 rotatably arranged in the worm plug hole 43, a driven worm wheel 46 rotatably arranged in the worm gear ring cavity 41 and meshing with the driving worm 45, and a plane threaded disk 47 arranged at the front end of the driven worm wheel 46 and rotatably matched with the annular wide cavity 42. The locking assembly 4 also includes a radial slide rod 48 slidably arranged in the corresponding radial plug hole 44, and a driven plug 49 arranged at the lower end of the radial slide rod 48 and plugged and matched with the plane threaded disk 47.

[0061] The limit stop rod 5 is arranged at the lower left of the rear end surface of the holding rod base plate 11 to limit the counterclockwise rotation of the rotating swing arm 2.

[0062] Furthermore: the front end surface of the fixed lock ring 356 and the rear end surface of the sliding lock ring 357 are evenly distributed circumferentially with anti-slip lock teeth arranged in the radial direction.

[0063] The installation foundation described in this case can be conveniently fixed on the electric pole:

[0064] The terminal circular shaft 121 and the internal threaded hole 122 are rotated to drive the external threaded rod 132 and the semicircular arc portion 131 to move backward relative to the pole holding base plate 11 until the U-shaped clamp 13 holds the electric pole 9 tightly.

[0065] In this case, the installation foundation is described. Under normal circumstances, the rotating swing arm 2 rotates counterclockwise and is stopped by the limit stop rod 5. When the angle of the rotating swing arm 2 needs to be adjusted, it can be rotated to a specified position and locked:

[0066] Step 1, unlock the rotational freedom of the rotating swing arm 2:

[0067] The active worm 45 is rotated to drive the driven worm wheel 46 and the plane threaded disk 47 to rotate, thereby driving the radial slide bar 48 to move radially outward, and the radial slide bar 48 is disengaged from the anti-rotation socket 116, thereby unlocking the rotational freedom of the rotating swing arm 2;

[0068] Step 2, rotate the swing arm 2 and lock its posture:

[0069] The swing arm body 25 is moved to overcome the damping of the torsion spring 34 so that the swing arm 2 is rotated to the optimal position, that is, the wireless temperature measurement module 7 is closest to the temperature measurement point (the connection point of the wire);

[0070] The active worm 45 is rotated in a direction opposite to that in step 1 so that the radial slide bar 48 is inserted into the anti-rotation insertion hole 116 again, thereby locking the rotational freedom of the rotating swing arm 2.

[0071] It should be noted that the rotation damping of the rotating swing arm 2 can also be adjusted:

[0072] As the instruction manual Figure 6 , 7 As shown:

[0073] Pressing the telescopic mandrel 353 causes the telescopic mandrel 353, the synchronous cross hole 354, and the sliding lock ring 357 to overcome the damping of the locking compression spring 358 and move forward;

[0074] The sliding lock ring 357 is disengaged from the fixed lock ring 356, and the rotational freedom of the locking assembly 35 and the central assembly 32 is unlocked;

[0075] The central component 32 is twisted, and the central gear 321 drives the transmission gear 316 to rotate, and finally drives the outer ring gear 33 to rotate, so as to adjust the twisting amount and torque of the torsion spring 34, and finally adjust the damping when the rotating swing arm 2 is rotated.

Claims

1. An adjustable mounting base on a pole of a wireless temperature measurement module, mounted on a utility pole (9), wherein the adjustable mounting base (8) is used to arrange a wireless temperature measurement module (7) to measure the temperature of a temperature measurement point, characterized in that: include: A pole holding assembly (1) comprises a pole holding base plate (11), a locking terminal (12), and a U-shaped holding hoop (13); A rotating swing arm (2) is rotatably arranged on the rear end surface of the holding rod base plate (11), and the stop end of the rotating swing arm (2) is used to install a wireless temperature measurement module (7); A rotating assembly (3) is arranged in the rotating swing arm (2) and is used to drive the rotating swing arm (2) to rotate counterclockwise; A locking assembly (4) is arranged in the rotating swing arm (2) and is used to lock the rotational freedom of the rotating swing arm (2); A limit stop bar (5) is arranged at the lower left side of the rear end surface of the holding rod base plate (11) and is used to limit the counterclockwise rotation of the rotating swing arm (2).

2. The adjustable pole mounting base of the wireless temperature measurement module according to claim 1, characterized in that: The pole holding base plate (11) comprises a rectangular plate body (111), the rectangular plate body (111) is provided with a through hole (112) penetrating in the front-to-back direction on the left and right sides respectively, the through hole (112) is provided with a limiting convex ring (113) on the inner wall, a fixed circular tube (114) is provided in the middle of the rear end surface of the rectangular plate body (111), the inner wall of the fixed circular tube (114) is provided with an inner tube convex ring (115), and the outer wall of the fixed circular tube (114) is evenly distributed with anti-rotation holes (116) in the circumferential direction; Two locking terminals (12) are provided, and each through-hole (112) is provided with a locking terminal (12), and the locking terminal (12) comprises a terminal shaft (121) rotatably provided in the corresponding through-hole (112), an internal threaded hole (122) provided at the front end of the terminal shaft (121), and a limiting ring groove (123) provided on the outer wall of the terminal shaft (121) and cooperating with the limiting convex ring (113); The U-shaped clamp (13) comprises a semicircular arc portion (131), and an external threaded rod (132) is respectively provided on the left and right sides of the semicircular arc portion (131), and the external threaded rod (132) is threadedly connected to the corresponding internal threaded hole (122).

3. The adjustable pole mounting base of the wireless temperature measurement module according to claim 2, characterized in that: The rotating swing arm (2) comprises a disc base (21), a central circular hole (22) formed at the center of the front end surface of the disc base (21) and sleeved on the outer wall of a fixed circular tube (114), a damping core shaft (23) arranged in front of the bottom of the central circular hole (22) and inserted into the fixed circular tube (114), a stopping outer ring (24) formed in front of the outer wall of the damping core shaft (23) and stopped in front of the convex ring (115) in the tube, and a swing arm body (25) arranged on the side of the disc base (21).

4. The adjustable pole mounting base of the wireless temperature measurement module according to claim 3, characterized in that: The rotating assembly (3) comprises: The central chamber (31) comprises a narrow diameter rear hole (311) provided at the rear end of the damping core shaft (23), a wide diameter circular cavity (312) provided in front of the narrow diameter rear hole (311), a core shaft annular groove (313) provided on the outer wall of the damping core shaft (23), and connecting side holes (314) uniformly distributed outside the wide diameter circular cavity (312) and connected to the core shaft annular groove (313), each connecting side hole (314) is respectively provided with a transmission gear shaft (315), and each transmission gear shaft (315) is rotatably provided with a transmission gear (316); The central component (32) comprises a central gear (321) rotatably disposed in the wide diameter circular cavity (312) and meshing with the transmission gear (316), a central thin shaft (322) disposed behind the central gear (321) and passing through the narrow diameter rear hole (311), and an adjustment knob (323) disposed behind the central thin shaft (322); An outer ring gear (33) is rotatably disposed in the mandrel ring groove (313) and meshes with the transmission gear (316); A torsion spring (34) is wound between the outer ring gear (33) and the fixed circular tube (114), one end of the torsion spring (34) is connected to the outer wall of the outer ring gear (33) and the other end is connected to the inner wall of the fixed circular tube (114); The locking assembly (35) comprises a locking through hole (351) which passes through a central gear (321), a central thin shaft (322), and an adjusting knob (323) in a front-to-rear direction, a synchronous cross bar (352) arranged on the inner wall of the locking through hole (351), a telescopic core shaft (353) which is slidably arranged in the locking through hole (351), and a synchronous cross hole (354) which is arranged in the telescopic core shaft (353) and is plugged and matched with the synchronous cross bar (352). The locking assembly (35) further comprises a locking blind hole (355) arranged in front of the wide diameter circular cavity (312), a fixed locking ring (356) arranged in the locking blind hole (355) and accommodating the telescopic core shaft (353) to pass through, a sliding locking ring (357) arranged at the front end of the telescopic core shaft (353) and locked with the fixed locking ring (356), and a locking compression spring (358) arranged in the locking blind hole (355) and located in front of the telescopic core shaft (353).

5. The adjustable pole mounting base of the wireless temperature measurement module according to claim 4, characterized in that: The locking assembly (4) comprises a worm wheel annular cavity (41) arranged outside the central circular hole (22) of the disc base (21), an annular wide cavity (42) formed on the outer edge of the front end of the worm wheel annular cavity (41), a worm screw hole (43) penetrating the disc base (21) in the up-down direction and communicating with the worm wheel annular cavity (41), radial screw holes (44) uniformly distributed in the circumferential direction in the disc base (21) and communicating with the annular wide cavity (42), and a rotatable screw hole (44) arranged in the worm screw hole (43). The locking assembly (4) comprises a driving worm (45), a driven worm wheel (46) rotatably disposed in the worm wheel annular cavity (41) and meshing with the driving worm (45), and a flat threaded disk (47) disposed at the front end of the driven worm wheel (46) and rotatably engaged with the annular wide cavity (42). The locking assembly (4) further comprises a radial slide rod (48) slidably disposed in the corresponding radial insertion hole (44), and a driven plug (49) disposed at the lower end of the radial slide rod (48) and plugged with the flat threaded disk (47).

6. The adjustable pole mounting base of the wireless temperature measurement module according to claim 5, characterized in that: The front end surface of the fixed lock ring (356) and the rear end surface of the sliding lock ring (357) are both circumferentially and evenly distributed with anti-slip lock teeth arranged in the radial direction.

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