Self-locking mechanism and application

Abstract

A self-locking mechanism comprises a positioning sliding seat, a positioning sliding sleeve, a supporting rod, a locking rod, a first guiding positioning sleeve, a second guiding positioning sleeve and a third guiding positioning sleeve, the positioning sliding sleeve is arranged in the positioning sliding seat in a sliding fit mode and is limited in the circumferential direction, the first guiding positioning sleeve, the second guiding positioning sleeve and the third guiding positioning sleeve are sequentially fixed in the positioning sliding sleeve, and four first oblique teeth are arranged on the annular face of the first guiding positioning sleeve; two groups of second helical teeth are arranged on the annular surface of the second guide positioning sleeve, an opening groove extending in the radial direction is formed between every two adjacent groups of second helical teeth, the number of the helical teeth of each group of second helical teeth is two, a guide strip-shaped hole is formed in the side wall of the third guide positioning sleeve, and the lock rod is rotatably arranged in the second guide positioning sleeve. One end of the locking rod extends out of the positioning sliding seat and is fixedly provided with a hook head, the locking rod is provided with a fixed clamping arm extending in the radial direction, the other end of the locking rod is sleeved with a movable clamping arm, one end of the supporting rod is fixedly connected with the positioning sliding sleeve, and the other end of the supporting rod extends out and is sleeved with a reset spring. The self-locking device is simple in structure and low in machining cost and has a self-locking function.

Description

Technical Field

[0001] The invention relates to the field of electrolytic aluminum, and in particular to a self-locking mechanism and its application. Background Art

[0002] Aluminum smelters use electrolytic cells to smelt aluminum. The electrolytic cells are equipped with multiple anodes, which are replaced periodically. In the actual production process, the replaced anodes need to be transferred and the usable parts in them need to be recovered.

[0003] Currently, the replaced anodes are placed on pallets and transported directly by forklifts. Due to the high center of gravity of the replaced anodes, the anodes frequently fall over during the transfer process, resulting in low transfer efficiency and the risk of personal injury.

[0004] The electrolytic cell anode transfer device previously designed by the applicant (CN 115159406 B) is equipped with an automatic opening and locking mechanism (CN 115094485 B). This automatic opening and locking mechanism cannot be self-locking and requires a high control accuracy of the forklift.

[0005] Therefore, how to design a self-locking mechanism suitable for the anode transport device of the electrolytic cell to achieve automatic locking and unlocking, and a self-locking mechanism that is convenient to lock and unlock, is a problem that needs to be solved urgently by technical personnel in this field. Summary of the invention

[0006] The purpose of the present invention is to provide a self-locking mechanism in view of the deficiencies in the prior art, which has a simple structure, low processing cost, and a self-locking function. On the basis of satisfying the automatic unlocking and locking functions, it can effectively reduce the control difficulty and accuracy.

[0007] The technical solution to achieve one of the purposes of the present invention is: a self-locking mechanism, including a positioning slide, a positioning sleeve, a support rod, a locking rod, a first guide positioning sleeve, a second guide positioning sleeve, and a third guide positioning sleeve, the positioning sleeve is slidably fitted in the positioning slide and circumferentially limited, the first guide positioning sleeve, the second guide positioning sleeve, and the third guide positioning sleeve are fixed in the positioning sleeve in sequence, and there is a spacing distance between the first guide positioning sleeve and the second guide positioning sleeve, four first bevel teeth are arranged on the annular surface of the first guide positioning sleeve facing the second guide positioning sleeve, and the four first bevel teeth evenly divide the circumference by 360°, two groups of second bevel teeth are arranged on the annular surface of the second guide positioning sleeve facing the first guide positioning sleeve, the two groups of second bevel teeth evenly divide the circumference by 360°, and radially extending open grooves are arranged between adjacent groups of second bevel teeth, the number of bevel teeth in each group of second bevel teeth is two, and the inclination direction is opposite to that of the first bevel teeth, and the third A guide strip hole is provided on the side wall of the guide positioning sleeve, and the guide strip hole includes a first strip hole and a second strip hole, the first strip hole and the second strip hole extend axially, the first strip hole and the second strip hole are staggered in the axial and circumferential directions, and the angle along the circumferential direction is 90°, the first strip hole and the second strip hole are connected by a connecting strip hole, the locking rod is rotatably arranged in the second guide positioning sleeve, one end of the locking rod extends out of the positioning slide seat through the third guide positioning sleeve, and is axially limited, and a hook head is fixed on the extended end of the locking rod, and a radially extending fixed clamp arm is provided on the locking rod, and the fixed clamp arm is slidably fitted in the guide strip hole, and the other end of the locking rod is sleeved with a radially extending movable clamp arm, and is axially limited, for inserting into the open groove or the tooth groove between the second bevel teeth of the same group, one end of the support rod is fixedly connected to the positioning slide sleeve, and the other end extends out of the positioning slide seat and is sleeved with a reset spring.

[0008] It also includes a dust cover. The upper end of the positioning slide is open. The dust cover is detachably installed on the upper end of the positioning slide to shield the opening.

[0009] The outwardly extending end of the support rod is a threaded section, and the thread is matched with an adjusting nut. One end of the reset spring is pressed against the positioning slide seat, and the other end is pressed against the adjusting nut.

[0010] It also includes an adjusting rod, which is thread-matched with the outwardly extending end of the support rod and is located on the same straight line.

[0011] The bottoms of two adjacent first oblique teeth are connected via a semicircular groove, and the cross section of the semicircular groove is adapted to the cross section of the clamping arm.

[0012] The bottoms of the two second oblique teeth in the same group are connected via a semicircular groove, and the cross section of the semicircular groove is adapted to the cross section of the clamping arm.

[0013] The first guide and positioning sleeve, the second guide and positioning sleeve, and the third guide and positioning sleeve are all provided with an annular groove on their circumferential side walls. Each guide and positioning sleeve is installed in a positioning sleeve. A plurality of bolts are threadedly engaged with the positioning sleeve and radially inserted into the annular groove to be fixed.

[0014] The fixed clamp arm is threadedly engaged with the locking rod to form a fixed connection.

[0015] The other end of the locking rod is a secondary stepped shaft, and the movable clamping arm includes a mounting ring and two clamping arms fixed on the mounting ring, the two clamping arms evenly divide the circumference by 360°, and the movable clamping arm is mounted on the small diameter section of the secondary stepped shaft through the mounting ring and is axially limited.

[0016] The object of the present invention is to provide a use of any of the above-mentioned self-locking mechanisms for locking or unlocking in an electrolytic cell anode transport device.

[0017] The above technical solution has the following beneficial effects:

[0018] 1. The self-locking mechanism comprises a positioning slide, a positioning sleeve, a support rod, a locking rod, a first guide positioning sleeve, a second guide positioning sleeve, and a third guide positioning sleeve. The positioning sleeve is slidably matched in the positioning slide and is circumferentially limited, that is, the positioning sleeve can move axially in the positioning slide, but cannot rotate. The first guide positioning sleeve, the second guide positioning sleeve, and the third guide positioning sleeve are fixed in the positioning sleeve in sequence, that is, each guide positioning sleeve can move with the positioning sleeve and cannot rotate. There is a spacing distance between the first guide positioning sleeve and the second guide positioning sleeve. Four first oblique teeth are arranged on the annular surface of the first guide positioning sleeve facing the second guide positioning sleeve, and the four first oblique teeth evenly divide the circumference of 360°. Two groups of second oblique teeth are arranged on the annular surface of the second guide positioning sleeve facing the first guide positioning sleeve, and the two groups of second oblique teeth evenly divide the circumference of 360°, and radially extending open grooves are arranged between adjacent groups of second oblique teeth. The number of oblique teeth in each group of second oblique teeth is two, and the inclination direction is opposite to that of the first oblique teeth. Obviously, the distance between the first oblique teeth and the second oblique teeth is fixed. The side wall of the third guide positioning sleeve is provided with a guide strip hole, and the guide strip hole includes a first strip hole and a second strip hole. The first strip hole and the second strip hole extend axially, and the first strip hole and the second strip hole are staggered in the axial and circumferential directions, and the angle along the circumferential direction is 90°. The first strip hole and the second strip hole are connected by a connecting strip hole, and the formed guide strip hole is used to control the reciprocating rotation of the locking rod within a circumferential range of 90°, which are respectively a locking position and an unlocking position. The locking rod is rotatably arranged in the second guide positioning sleeve, and one end of the locking rod extends out of the positioning slide seat through the third guide positioning sleeve, and is axially limited, that is, the locking rod can rotate circumferentially but cannot move axially. A hook head is fixedly arranged at the protruding end of the locking rod, and the hook head is driven by the locking rod to reciprocate within a circumferential range of 90° for locking or unlocking. The locking rod is provided with a radially extending fixed clamp arm, which is slidably fitted in the guide strip hole. Since the locking rod can rotate circumferentially and be axially limited, and the third guide positioning sleeve can move axially and be circumferentially limited, when the positioning sleeve drives the third guide positioning sleeve to reciprocate axially, the locking rod is driven to reciprocate within a circumferential range of 90° to achieve unlocking or locking.The other end of the locking rod is sleeved with a radially extending movable clamping arm and axially limited for inserting into the open groove or the tooth groove between the second bevel teeth of the same group. One end of the support rod is fixedly connected to the positioning sleeve, and the other end extends outward from the positioning slide seat and is sleeved with a return spring. Under normal circumstances, the positioning sleeve has a tendency to move away from the hook head under the action of the return spring, and the movable clamping arm is inserted into the open groove, so that the positioning sleeve is axially limited by the positioning slide seat (the positioning sleeve is tightly pressed against the positioning slide seat) or the open groove and the movable clamping arm cooperate to form an axial limit, so that the hook head on the locking rod faces one direction, which is the locking position or the unlocking position. When force is applied to the support rod, the positioning sleeve moves a certain distance toward the hook head, and the locking rod rotates 90°, so that the hook head on the locking rod faces another direction, which is the unlocking position or the locking position. At the same time, the movable The locking arm disengages from the opening groove, and the tooth surface of the first bevel tooth drives the movable locking arm to rotate 90° in the circumferential direction. The force is cancelled, and the positioning sleeve has a tendency to move away from the hook head under the action of the return spring, so that the movable locking arm is stuck between the two second bevel teeth, forming a self-locking, keeping the lock head in the unlocked position or the locked position. In addition, when resetting is required, force is applied to the support rod to make the positioning sleeve move a short distance toward the hook head, and the inclined surface of the first bevel tooth drives the movable locking arm to continue to rotate 90° in the circumferential direction, so that the movable locking arm corresponds to the opening groove. The force is cancelled, and the positioning sleeve has a tendency to move away from the hook head under the action of the return spring, and the locking rod rotates 90° in the opposite direction, and the movable locking arm is stuck in the opening groove again, so that the positioning sleeve is axially limited by the positioning slide seat or by the cooperation of the opening groove and the movable locking arm to form an axial limit, so that the hook head on the locking rod is reset.

[0019] 2. The extended end of the support rod is a threaded section, and the thread is matched with an adjusting nut. One end of the reset spring is pressed against the positioning slide, and the other end is pressed against the adjusting nut, so that the elastic force of the reset spring can be adjusted to meet the actual needs of the enterprise. It also includes an adjusting rod, which is threadedly connected to the extended end of the support rod and is located on the same straight line, so that the extended length of the adjusting rod can be adjusted to meet the actual needs of the enterprise.

[0020] 3. Annular grooves are arranged on the circumferential side walls of the first guide locating sleeve, the second guide locating sleeve and the third guide locating sleeve. Each guide locating sleeve is installed in a locating sleeve. Multiple bolts are threadedly engaged on the locating sleeve and radially inserted into the annular grooves to be fixed. Combined with the upper opening of the locating slide, it is convenient to install and disassemble each guide locating sleeve, thereby reducing processing costs and maintenance difficulties.

[0021] Further description is given below in conjunction with the accompanying drawings and specific implementation methods. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural schematic diagram of the present invention;

[0023] Figure 2It is a schematic diagram of the cooperation between the positioning slide seat and the positioning sleeve of the present invention;

[0024] Figure 3 It is a structural schematic diagram of the first guide and positioning sleeve of the present invention;

[0025] Figure 4 for Figure 3 Schematic diagram of the expansion;

[0026] Figure 5 It is a structural schematic diagram of the second guide and positioning sleeve of the present invention;

[0027] Figure 6 for Figure 5 Schematic diagram of the expansion;

[0028] Figure 7 It is a schematic structural diagram of a third guide and positioning sleeve of the present invention;

[0029] Figure 8 It is a schematic diagram of the development of the guide strip hole of the present invention;

[0030] Fig. 9 It is a structural schematic diagram of the movable clamp arm of the present invention;

[0031] Fig.10 It is a schematic structural diagram of the dust cover of the present invention.

[0032] In the accompanying drawings, 1 is a positioning slide, 2 is a positioning sleeve, 3 is a support rod, 4 is a locking rod, 5 is a first guide positioning sleeve, 6 is a second guide positioning sleeve, 7 is a third guide positioning sleeve, 8 is a first oblique tooth, 9 is a second oblique tooth, 10 is a guide strip hole, 10a is a first strip hole, 10b is a second strip hole, 10c is a connecting strip hole, 11 is a hook head, 12 is a fixed clamp arm, 13 is a movable clamp arm, 13a is a mounting ring, 14 is a reset spring, 15 is a dust cover, 16 is an adjusting nut, 17 is an adjusting rod, and 18 is an open slot. DETAILED DESCRIPTION

[0033] See also Figures 1 to 10, which is a specific embodiment of a self-locking mechanism. The self-locking mechanism includes a positioning slide 1, a positioning sleeve 2, a support rod 3, a locking rod 4, a first guide positioning sleeve 5, a second guide positioning sleeve 6, and a third guide positioning sleeve 7. The positioning sleeve 2 is slidably fitted in the positioning slide 1 and is circumferentially limited. Specifically, the positioning slide is a long box-shaped structure with an open upper end. The positioning slide is also a long box-shaped structure and also includes a dust cover 15. The dust cover 15 is detachably installed on the upper end of the positioning slide 1 to form a shield for the open opening. The first guide positioning sleeve 5, the second guide positioning sleeve 6, and the third guide positioning sleeve 7 are fixed in the positioning sleeve 2 from left to right in sequence. Specifically, the circumferential side walls of the first guide positioning sleeve 5, the second guide positioning sleeve 6, and the third guide positioning sleeve 7 are all provided with an annular groove, and each guide positioning sleeve is installed in the positioning sleeve. A plurality of bolts are threadedly fitted on the positioning sleeve and radially inserted into the annular groove to form a fixation. There is a spacing distance between the first guide and positioning sleeve 5 and the second guide and positioning sleeve 6. Four first oblique teeth 8 are arranged on the annular surface of the first guide and positioning sleeve 5 facing the second guide and positioning sleeve 6. The four first oblique teeth 8 evenly divide the circumference of 360°, and the bottoms of two adjacent first oblique teeth 8 are connected by a semicircular groove. Two groups of second oblique teeth 9 are arranged on the annular surface of the second guide and positioning sleeve 6 facing the first guide and positioning sleeve 5. The two groups of second oblique teeth evenly divide the circumference of 360°, and radially extending open grooves 18 are arranged between adjacent groups of second oblique teeth. The number of oblique teeth in each group of second oblique teeth is two, and the inclination direction is opposite to that of the first oblique teeth. A guide bar hole 10 is arranged on the side wall of the third guide and positioning sleeve 7. The bottoms of two second oblique teeth 9 in the same group are connected by a semicircular groove, and the cross section of the semicircular groove is adapted to the cross section of the clamping arm. The guide strip hole 10 includes a first strip hole 10a and a second strip hole 10b. The first strip hole 10a and the second strip hole 10b extend axially. The first strip hole 10a and the second strip hole 10b are staggered in the axial direction and the circumferential direction, and the angle along the circumferential direction is 90°. The first strip hole 10a and the second strip hole 10b are connected through the connecting strip hole 10c. The locking rod 4 is rotatably arranged in the second guide positioning sleeve 6. One end of the locking rod 4 extends out of the positioning slide 1 through the third guide positioning sleeve 7 and is axially limited. In this embodiment, a plane bearing is fixedly arranged in the positioning slide, and one end of the locking rod is tightly sleeved in the inner ring of the plane bearing to form a support and axial limit at the same time. A hook head 11 is fixedly arranged at the extended end of the locking rod 4. A radially extending fixed clamp arm 12 is arranged on the locking rod 4. The fixed clamp arm 12 is slidably fitted in the guide strip hole 10. Specifically, the fixed clamp arm 12 is threadedly fitted on the locking rod 4 to form a fixed connection.The other end of the lock rod 4 is sleeved with a radially extending movable clamp arm 13, and is axially limited, for inserting into the open groove or the tooth groove between the second helical teeth of the same group. In this embodiment, the other end of the lock rod 4 is a secondary stepped shaft, and the movable clamp arm 13 includes a mounting ring 13a and two clamp arms fixed on the mounting ring 13a, and the two clamp arms evenly divide the circumference by 360°. The movable clamp arm 13 is sleeved on the small diameter section of the secondary stepped shaft through the mounting ring and is axially limited. One end of the support rod 3 is fixedly connected to the positioning sleeve 2, and the other end extends out of the positioning slide 1, and is sleeved with a reset spring 14. Specifically, the extended end of the support rod 3 is a threaded section, and the thread is matched with an adjusting nut 16. One end of the reset spring 14 is pressed against the positioning slide 1, and the other end is pressed against the adjusting nut 16, and also includes an adjusting rod 17, and the adjusting rod 17 is threadedly connected to the extended end of the support rod 3 and is located on the same straight line.

[0034] The working principle of the present invention is: taking the installation in the patent technology (application publication number is CN 115159406 A) as an example, the active hook of the locking mechanism in the patent technology is replaced by the self-locking mechanism of the present invention, while retaining its swing arm group.

[0035] Under normal circumstances, the positioning sleeve has a tendency to move away from the hook head under the action of the return spring, and the movable clamping arm is inserted into the open groove, so that the positioning sleeve is axially limited by the positioning slide seat, so that the hook head on the locking rod faces upward, which is the locked position (the swing arm of the swing arm group is blocked by the upward hook head); when force is applied to the support rod, the positioning sleeve moves a certain distance toward the hook head, and the locking rod rotates 90°, so that the hook head on the locking rod faces horizontally, which is the unlocked position (the swing arm of the swing arm group can rotate freely). At the same time, the movable clamping arm disengages from the open groove, and the tooth surface of the first bevel tooth drives the movable clamping arm to rotate 90° in the circumferential direction. The force is withdrawn, and the positioning sleeve has a tendency to move away from the hook head under the action of the return spring, so that the movable clamping arm is stuck between the two second bevel teeth, forming a self-locking, keeping the lock head in the unlocked position. When resetting is required, force is applied to the support rod to move the positioning sleeve a short distance toward the hook head, and the inclined surface of the first oblique tooth drives the movable clamping arm to continue to rotate 90° in the circumferential direction, so that the movable clamping arm corresponds to the opening groove, and the force is cancelled. The positioning sleeve has a tendency to move away from the hook head under the action of the reset spring, and the locking rod rotates 90° in the opposite direction, and the movable clamping arm is clamped in the opening groove again, so that the positioning sleeve is axially limited by the positioning slide seat, so that the hook head on the locking rod is reset to the locked position.

Claims

1. A self-locking mechanism, characterized in that: It comprises a positioning slide (1), a positioning sleeve (2), a support rod (3), a locking rod (4), a first guide positioning sleeve (5), a second guide positioning sleeve (6), and a third guide positioning sleeve (7). The positioning sleeve (2) is slidably fitted in the positioning seat (1) and is circumferentially limited. The first guide locating sleeve (5), the second guide locating sleeve (6), and the third guide locating sleeve (7) are fixed in sequence in the locating sleeve (2); there is a spacing distance between the first guide locating sleeve (5) and the second guide locating sleeve (6); four first oblique teeth (8) are arranged on the annular surface of the first guide locating sleeve (5) facing the second guide locating sleeve (6); the four first oblique teeth (8) evenly divide the circumference by 360°; two groups of second oblique teeth (9) are arranged on the annular surface of the second guide locating sleeve (6) facing the first guide locating sleeve (5); the two groups of second oblique teeth evenly divide the circumference by 360°, and radially extending openings are arranged between adjacent groups of second oblique teeth. The third guide sleeve (7) has a groove (18), each group of second bevel teeth has two bevel teeth, and the bevel direction is opposite to that of the first bevel teeth. A guide strip hole (10) is provided on the side wall of the third guide sleeve (7). The guide strip hole (10) includes a first strip hole (10a) and a second strip hole (10b). The first strip hole (10a) and the second strip hole (10b) extend in the axial direction. The first strip hole (10a) and the second strip hole (10b) are staggered in the axial direction and the circumferential direction, and the angle along the circumferential direction is 90 degrees. The first strip hole (10a) and the second strip hole (10b) are connected through a connecting strip hole (10c). The locking rod (4) is rotatably arranged in the second guide positioning sleeve (6), one end of the locking rod (4) extends out of the positioning slide seat (1) through the third guide positioning sleeve (7) and is axially limited, a hook head (11) is fixedly arranged on the extended end of the locking rod (4), and a radially extending fixed clamp arm (12) is arranged on the locking rod (4), and the fixed clamp arm (12) is slidably matched in the guide strip hole (10), and the other end of the locking rod (4) is sleeved with a radially extending movable clamp arm (13) and is axially limited for being inserted into the open groove or the tooth groove between the second bevel teeth of the same group. One end of the support rod (3) is fixedly connected to the positioning sliding sleeve (2), and the other end extends out of the positioning sliding seat (1) and is sleeved with a return spring (14).

2. The self-locking mechanism according to claim 1, characterized in that: It also includes a dust cover (15). The upper end of the positioning slide (1) is open. The dust cover (15) is detachably mounted on the upper end of the positioning slide (1) to shield the open end.

3. The self-locking mechanism according to claim 1, characterized in that: The extended end of the support rod (3) is a threaded section, and the thread is matched with an adjusting nut (16); one end of the return spring (14) is tightly pressed against the positioning slide (1), and the other end is tightly pressed against the adjusting nut (16).

4. The self-locking mechanism according to claim 1 or 3, characterized in that: It also comprises an adjusting rod (17), wherein the adjusting rod (17) is threadably connected to the outwardly extending end of the support rod (3) and is located on the same straight line.

5. The self-locking mechanism according to claim 1, characterized in that: The bottoms of two adjacent first oblique teeth (8) are connected via a semicircular groove, and the cross section of the semicircular groove is adapted to the cross section of the clamping arm.

6. The self-locking mechanism according to claim 1, characterized in that: The bottoms of two second oblique teeth (9) in the same group are connected via a semicircular groove, and the cross section of the semicircular groove is adapted to the cross section of the clamping arm.

7. The self-locking mechanism according to claim 1, characterized in that: The first guide and positioning sleeve (5), the second guide and positioning sleeve (6), and the third guide and positioning sleeve (7) are all provided with an annular groove on their circumferential side walls. Each guide and positioning sleeve is installed in a positioning sleeve. A plurality of bolts are threadedly engaged with the positioning sleeve and radially inserted into the annular groove to be fixed.

8. The self-locking mechanism according to claim 1, characterized in that: The fixed clamp arm (12) is threadedly engaged with the locking rod (4) to form a fixed connection.

9. The self-locking mechanism according to claim 1, characterized in that: The other end of the locking rod (4) is a secondary stepped shaft. The movable clamping arm (13) comprises a mounting ring (13a) and two clamping arms fixed on the mounting ring (13a). The two clamping arms evenly divide a 360° circumference. The movable clamping arm (13) is sleeved on the small diameter section of the secondary stepped shaft through the mounting ring and is axially limited.

10. Use of the self-locking mechanism according to any one of claims 1 to 9 for locking or unlocking in an anode transport device of an electrolytic cell.

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