CN115493538B

CN115493538B - Harbor machinery gyration position detection device

Info

Publication number: CN115493538B
Application number: CN202211146694.0A
Authority: CN
Inventors: 侯文晟; 黄进前; 王金刚; 秦伟伟; 高天雪
Original assignee: Jiangsu Weihua Ocean Heavy Industry Co ltd
Current assignee: Jiangsu Weihua Ocean Heavy Industry Co ltd
Priority date: 2022-09-21
Filing date: 2022-09-21
Publication date: 2023-09-29
Anticipated expiration: 2042-09-21
Also published as: CN115493538A

Abstract

The invention discloses a device for detecting the rotation position of a port machine, and relates to the technical field of port machines; the device specifically comprises a mounting frame fixedly mounted on a mechanical seat body and a follow-up ring mounted on a mechanical rotating component, wherein a limit guide rail is mounted at the bottom end of the mounting frame, a movable block is mounted at the top of the limit guide rail in a sliding manner, a detection shell is fixedly mounted at the top of the movable block, a traction baffle and a fixing seat are sequentially mounted on the side surface of the detection shell, and a detection controller is mounted on the outer side of the mounting frame. The invention is provided with the follow-up ring which moves along with the mechanical rotating component and the detection equipment which is fixed on the mechanical seat body, and the rotation information is effectively verified through multiple signal conversion display.

Description

Harbor machinery gyration position detection device

Technical Field

The invention relates to the technical field of port machinery, in particular to a port machinery rotation position detection device.

Background

The port is a collection point and a junction of the amphibious traffic, is a collection and distribution place of industrial and agricultural products and foreign trade import and export materials, is also a place for ship berthing, loading and unloading goods, loading and unloading passengers and supplementing supply, and is provided with a plurality of intermittent operation loading and unloading mechanical devices (portal, tire type, automobile type, bridge type and container cranes, unloading machines and the like), continuous operation loading and unloading mechanical devices (belt conveyors, bucket elevators, compressed air and hydraulic conveying devices, pump stations and the like), power supply lighting devices, communication devices, water supply and drainage devices, fireproof devices and the like. The mechanical equipment for the on-road transportation in the harbor comprises trains, trucks, self-propelled carrier vehicles, pipeline conveying equipment and the like.

In order to transfer cargoes from ships, wharfs and the like, a part of cargo handling machinery of a port needs to be rotated, and when each rotation is performed, or through ground observation command of handling personnel, or through detection of a rotation position by a sensor, effective information is provided for an operator, however, in a port environment, under mechanical operation vibration and port strong wind weather conditions, especially under mechanical load and no load, deflection of a rotation supporting structure under the two working conditions is essential, the rotation position of a mechanical rotation position detection device and the rotation position of the machinery are easy to loosen, so that detection result errors are large, and judgment of the operator is affected.

In view of the above, the present invention provides a device for detecting the rotation position of a harbour machinery, so as to solve the above-mentioned technical problems in the prior art.

Disclosure of Invention

Based on the technical problems in the background art, the invention provides a harbour machinery rotation position detection device.

The invention provides a harbour machinery gyration position detection device which comprises a mounting frame fixedly mounted on a mechanical seat body and a follower ring mounted on a mechanical rotating part, wherein a limit guide rail is mounted at the inner bottom end of the mounting frame, a movable block is slidably mounted at the top of the limit guide rail, a detection shell is fixedly mounted at the top of the movable block, a traction baffle and a fixed seat are sequentially mounted on the side surface of the detection shell, a detection controller is mounted on the outer side of the mounting frame, a detection roller meshed with the follower ring is rotatably mounted between the traction baffle and the fixed seat, a balance mechanism in rolling connection with the surface of the follower ring is further mounted between the traction baffle and the fixed seat, a transmission mechanism is mounted at the bottom of the detection roller, a follower wheel is mounted at the bottom of the transmission mechanism, a detection groove distributed in an annular array is formed in the surface of the follower wheel, a mounting groove is formed between the fixed seat and the detection shell, a linkage mechanism capable of moving left and right is mounted in the mounting groove, a support plate is mounted in the mounting groove, signal sensing contacts are mounted on the two sides of the support plate, a compensation mechanism is mounted between the bottom of the support plate and the detection shell, and the support plate is provided with an excitation mechanism.

In the invention, preferably, the displacement compensation mechanism comprises a guide sliding rail and a stepping motor, a bidirectional screw rod in transmission connection with the stepping motor is arranged in the guide sliding rail, compensation pieces in synchronous movement are screwed at two ends of the outer side of the bidirectional screw rod, and a compensation push rod is hinged between the compensation pieces and the detection shell.

In the present invention, preferably, the compensation member in the displacement compensation mechanism is composed of a sleeve, a movable member and a stabilizing spring, and the movable member is disposed inside the sleeve through the stabilizing spring.

In the invention, preferably, the linkage mechanism comprises a linkage limiting sleeve, a movable bolt is slidably arranged in the linkage limiting sleeve, a push spring is arranged between the two ends of the linkage limiting sleeve and the movable bolt, one end of the movable bolt, which is close to the follower, is in rolling connection with a rolling ball, and the rolling ball is in rolling connection with the surface of the follower.

In the invention, preferably, the contact excitation mechanism comprises a plurality of meshing gears rotatably arranged in the mounting groove, a linkage rack fixedly arranged at the lower end of the linkage mechanism, and an excitation piece slidably arranged at the outer side of the supporting plate, wherein the meshing gears are arranged between the linkage rack and the excitation piece in a meshing connection manner.

In the invention, preferably, the transmission mechanism comprises a main chain wheel arranged at the bottom of the detection roller and a driven chain wheel arranged at the upper end of the driven wheel, and a transmission chain is arranged between the main chain wheel and the driven chain wheel.

Preferably, the balancing mechanism comprises a balancing groove arranged on the surfaces of the traction baffle and the fixed seat, and a balancing block slidably arranged between the traction baffle and the fixed seat, wherein a balancing bracket is rotatably arranged at two ends of one side of the balancing block, a balancing roller positioned at two sides of the detection roller is arranged at the other end of the balancing bracket, two ends of the balancing roller are respectively slidably connected with the balancing groove, a compressing torsion spring is arranged between the balancing bracket and the balancing block, and a damping rod and a pressure sensor are arranged between the other side of the balancing bracket and the detection housing.

In the invention, preferably, the outer end of the traction baffle is provided with a traction mechanism, and the top of the follow-up ring is provided with a convex ring matched with the traction mechanism.

In the invention, preferably, the traction mechanism comprises a connecting rod and a rolling ring, a movable cavity is arranged in the rolling ring, a traction ring is arranged at the bottom end of the connecting rod, and conical springs are arranged between the top and bottom of the traction ring and the rolling ring.

Compared with the prior art, the invention provides a port machinery rotation position detection device, which has the following beneficial effects:

according to the invention, the follow-up ring which moves along with the mechanical rotating part and the detection equipment fixed on the mechanical seat body are arranged, the size of the follow-up ring is arranged according to the mechanical size and the rotating range in application, and the transmission mechanism which is connected between the detection roller and the follow-up wheel is arranged in the detection equipment, the rotating speed ratio of the transmission mechanism is arranged according to the size of the follow-up ring. At this time, the displacement compensation mechanism operates to compensate the deflection of the device, and the operation stability of the detection device is improved.

Drawings

Fig. 1 is a schematic structural diagram of a device for detecting a rotation position of a harbour machinery according to the present invention;

fig. 2 is a schematic diagram of a partial top view structure of a harbor machine rotation position detecting device according to the present invention;

fig. 3 is a schematic diagram of a partial enlarged structure of a harbor machinery rotation position detecting device according to the present invention;

fig. 4 is a schematic structural diagram of a linkage mechanism of a harbor machinery rotation position detecting device according to the present invention;

fig. 5 is a schematic diagram of a follower wheel structure of a harbor machinery rotation position detecting device according to the present invention;

fig. 6 is a schematic diagram of a transmission mechanism of a harbor machinery rotation position detecting device according to the present invention;

fig. 7 is a schematic structural diagram of a traction mechanism of a device for detecting a rotation position of a harbour machinery according to the present invention;

fig. 8 is a schematic structural diagram of a contact excitation mechanism of a harbor machinery rotation position detection device according to the present invention;

fig. 9 is a schematic structural diagram of a balancing mechanism of a device for detecting a rotation position of a harbour machinery according to the present invention;

fig. 10 is a schematic structural diagram of a displacement compensation mechanism of a harbor machinery rotation position detecting device according to the present invention.

In the figure: 1 mounting rack, 2 movable blocks, 3 mechanical seat bodies, 4 follower rings, 5 traction baffles, 6 fixing seats, 7 detection shells, 8 mechanical rotating parts, 9 mounting grooves, 10 detection controllers, 11 limit guide rails, 12 follower wheels, 13 displacement compensation mechanisms, 1301 guide rails, 1302 bidirectional screw rods, 1303 stepping motors, 1304 compensation push rods, 1305 movable pieces, 1306 sleeves, 1307 stable springs, 14 signal induction contacts, 15 support plates, 16 contact excitation mechanisms, 1601 excitation pieces, 1602 meshing gears, 1603 linkage racks, 17 linkage mechanisms, 1701 linkage limit sleeves, 1702 movable bolts, 1703 push springs, 1704 balls, 18 convex rings, 19 traction mechanisms, 1901 connecting rods, 1902 rolling rings, 1903 traction rings, 1904 conical springs, 20 detection rollers, 21 transmission mechanisms, 2101 main chain wheels, 2102 driven chain wheels, 2103 transmission chains, 22 balance mechanisms, 2201 balance weights, 2202, 2203 damping rods, 2204 balance rollers, 2205 pressure sensors, 2206 balance brackets and 2207 balance grooves.

Detailed Description

Embodiments of the present patent are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary only for explaining the present patent and are not to be construed as limiting the present patent.

Example 1:

referring to fig. 1-6 and 8-10, a harbour machinery gyration position detection device, including fixed mounting bracket 1 on mechanical pedestal 3, and install the follower 4 on mechanical rotating member 8, spacing rail 11 is installed to the inside bottom of mounting bracket 1, and spacing rail 11's top slidable mounting has movable block 2, movable block 2's top fixed mounting has detection casing 7, and detection casing 7's side installs traction baffle 5 and fixing base 6 in proper order, detection controller 10 is installed in the outside of mounting bracket 1, install the detection roller 20 with follower 4 meshing transmission between traction baffle 5 and the fixing base 6 rotation, and still install the balancing mechanism 22 with follower 4 surface roll connection between traction baffle 5 and the fixing base 6, transmission 21 is installed to the bottom of detection roller 20, and follower 12 is installed to the bottom of transmission 21, follower 12 surface is provided with the annular array distributed's detection recess, be provided with mounting groove 9 between fixing base 6 and the detection casing 7, and mounting groove 9's internally mounted has movable mechanism 17 about, the tip of follower 17 and follower 12 surface connection backup pad 9, still install the inside contact 15 and the inside of backup pad 15 between the inside of backup pad 15 and the inside of backup pad 15, the inside of the backup pad 15 is installed with the inside of the backup pad 15, and the inside of the backup pad 15 is installed between the backup pad 15 is installed, and the inside of the backup pad 13 is installed 13.

As a still further scheme in the invention, the displacement compensation mechanism 13 comprises a guide slide rail 1301 and a stepping motor 1303, a bidirectional screw rod 1302 in transmission connection with the stepping motor 1303 is installed in the guide slide rail 1301, compensation elements in synchronous motion are screwed at two ends of the outer side of the bidirectional screw rod 1302, a compensation push rod 1304 is hinged between the compensation elements and the detection shell 7, when the position between the detection shell 7 and the mechanical rotary part 8 needs to be adjusted, a compensation signal controls the stepping motor 1303 to rotate to drive the two compensation elements to approach or separate from each other, the detection shell 7 is dragged to move, and the effect of compensating and adjusting the position of the detection shell 7 is achieved.

As a still further scheme in the invention, the compensation element in the displacement compensation mechanism 13 is composed of a sleeve 1306, a movable element 1305 and a stabilizing spring 1307, and the movable element 1305 is arranged in the sleeve 1306 through the stabilizing spring 1307.

As a still further scheme in the invention, the linkage mechanism 17 comprises a linkage limiting sleeve 1701, a movable bolt 1702 is slidably arranged in the linkage limiting sleeve 1701, a push spring 1703 is arranged between the two ends of the linkage limiting sleeve 1701 and the movable bolt 1702, one end of the movable bolt 1702, which is close to the follower 12, is in rolling connection with a rolling ball 1704, the rolling ball 1704 is in rolling connection with the surface of the follower 12, when encountering a detection groove, the movable bolt 1702 rapidly moves to one side under the action of the push spring 1703, and when continuously rotating, the rolling ball 1704 is separated from the detection groove to reset, and two push springs 1703 are respectively connected with the two ends of the linkage limiting sleeve 1701 and the movable bolt 1702 to form a bidirectional damping structure, so that the movement energy is rapidly consumed after the movement of the movable bolt 1702, the phenomenon of repeatedly rebounding is avoided, and the detection precision of the detection device is further improved.

As still further scheme in the invention, the contact excitation mechanism 16 comprises a plurality of meshing gears 1602 rotatably installed in the installation groove 9, a linkage rack 1603 fixedly installed at the lower end of the linkage mechanism 17, and an excitation member 1601 slidably installed at the outer side of the support plate 15, wherein the meshing gears 1602 are arranged between the linkage rack 1603 and the excitation member 1601 in a meshed connection, the excitation member 1601 always presses a signal sensing contact 14 positioned at one end on the support plate 15 in a normal state, when the machine rotates, the motion is transmitted to the linkage mechanism 17, the linkage rack 1603 is driven to move under the action of a movable bolt 1702, and the excitation member 1601 moves to the other end through the transmission among the meshing gears 1602, the linkage rack 1603 and the excitation member 1601, so that the other signal sensing contact 14 positioned on the support plate 15 is pressed, thereby completing the signal conversion, the reaction speed is high, the transmission process is stable, and the stability of the detection process is improved.

As a still further scheme in the invention, the transmission mechanism 21 comprises a main chain wheel 2101 arranged at the bottom of the detection roller 20 and a driven chain wheel 2102 arranged at the upper end of the follower wheel 12, and a transmission chain 2103 is arranged between the main chain wheel 2101 and the driven chain wheel 2102.

As a still further proposal of the invention, the balancing mechanism 22 comprises a balancing groove 2207 arranged on the surfaces of the traction baffle 5 and the fixed seat 6, and a balancing weight 2201 which is slidably arranged between the traction baffle 5 and the fixed seat 6, wherein a balancing bracket 2206 is rotatably arranged at two ends of one side of the balancing weight 2201, a balancing roller 2204 positioned at two sides of the detection roller 20 is arranged at the other end of the balancing bracket 2206, two ends of the balancing roller 2204 are respectively in sliding connection with the balancing groove 2207, a compressing torsion spring 2202 is arranged between the balancing bracket 2206 and the balancing weight 2201, a damping rod 2203 and a pressure sensor 2205 are arranged between the other side of the balancing bracket 2206 and the detection shell 7, when the detection device operates steadily, the compressing torsion spring 2202 acts on the balancing bracket 2206, so that the balancing rollers 2204 at two sides are symmetrically distributed at two sides of the detection roller 20, and at this moment, the numerical value of the pressure sensor 2205 is constant, when the follower ring 4 vibrates and deflects along with the operation of the machine, the balance rollers 2204 on two sides are extruded to drive the balance rollers to expand outwards, under the action of the compressed torsion spring 2202, the detection shell 7 is driven to move integrally so as to reduce the extrusion force received by the detection roller 20, meanwhile, the gap between the detection roller 20 and the follower ring 4 is kept in a balanced stable state, the detection accuracy reduction caused by the influence of deformation on the detection roller 20 is avoided, meanwhile, according to the pressure change range of the pressure sensor 2205, the displacement compensation mechanism 13 makes corresponding action, multiple reactions quickly compensate the influence caused by the movement of the follower ring 4, the detection accuracy of the device is further improved, and the stability of the detection process is improved under the complex environment of the operation of the port machine.

Example 2:

referring to fig. 1-10, a harbour machinery rotation position detection device is disclosed, wherein a traction mechanism 19 is installed at the outer end of a traction baffle 5, a convex ring 18 matched with the traction mechanism 19 is arranged at the top of a follower ring 4, in the invention, the traction mechanism 19 and the convex ring 18 are arranged, when the follower ring 4 follows a machine to perform rotation motion, the outer side of the follower ring 4 is in contact transmission with a detection roller 20, rotation signals are transmitted, the position between the follower ring 4 and the detection roller 20 is limited in a fixed range through the action of the traction mechanism 19 and the convex ring 18 and in cooperation with a balance mechanism 22 in the device, the phenomenon of separating from the detection roller 20 caused by deformation and vibration of the follower ring 4 is avoided, and the stability and the accuracy of rotation position detection result are further ensured.

The traction mechanism 19 comprises a connecting rod 1901 and a rolling ring 1902, a movable cavity is arranged in the rolling ring 1902, a traction ring 1903 is arranged at the bottom end of the connecting rod 1901, a conical spring 1904 is arranged between the top and the bottom of the traction ring 1903 and the rolling ring 1902, the bottom of the traction mechanism 19 is connected with the rolling ring 1902 positioned at the outer side through the conical spring 1904 and the traction ring 1903, the rolling ring 1902 is in rolling connection with the inner wall of the convex ring 18, when the follower ring 4 is deformed and vibrates during operation, the rolling ring 1902 presses the rolling ring 1902 inside, reverse traction force is generated on the traction baffle 5 under the restoring elasticity of the conical spring 1904, and the combined action of the balance mechanism 22 positioned at the outer side of the follower ring 4 is matched, so that the detection roller 20 in the detection device floats at the outer side of the follower ring 4, the detection roller 20 and the follower ring 4 are always in a dynamic balance state, and the transmission is stable, and further the detection stability of the action process of the mechanical rotary position of a port is ensured.

In use, the size of the follower ring 4 is set according to the mechanical size and the rotation range, a transmission mechanism 21 for connecting the detection roller 20 and the follower ring 12 is arranged in the detection device, the rotation speed ratio of the transmission mechanism 21 is set according to the size of the follower ring 4, in this embodiment, four detection grooves distributed in annular arrays are arranged on the surface of the follower ring 12, each time the follower ring 4 rotates for 5 degrees, the detection roller 20 rotates for 1 week, the follower ring 12 rotates for 5 weeks under the transmission of the transmission mechanism 21, at this time, the linkage mechanism 17 is influenced by the detection grooves on the surface of the follower ring 12 to generate four reciprocating motions, the contact excitation mechanism 16 impacts the signal sensing contact 14 to form four signal transitions, the micro rotation information which cannot be identified by human eyes is accurately displayed, next, the rotation information is effectively verified through multiple signal transition displays, compared with the traditional sensor type detection, the result is more accurate, the mechanical transmission type detection signal is more stable, when the mechanical self-operation or harbour environment influence produces vibration offset, the vibration offset is buffered and reset through the balance mechanisms 22 distributed on two sides of the detection roller 20, meanwhile, the displacement compensation mechanism 13 is arranged between the detection shell 7 carrying the detection equipment and the mounting frame 1, the detection shell 7 can slide linearly inside the mounting frame 1, in the detection process, when the mechanical self-offset exceeds the buffer range of the balance mechanism 22 according to the signal conversion strength and the quantity analysis of the signal sensing contact 14, the signal strength change is large or the loss occurs, namely, the detection device is influenced by the mechanical self-operation or harbour environment, the displacement difference occurs between the follower ring 4 and the detection roller 20, and the balance mechanism 22 can not compensate, at this time, the displacement compensation mechanism 13 operates to compensate for the deflection of the device, thereby improving the stability of the operation of the detection device.

The foregoing is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art, who is within the scope of the present invention, should make equivalent substitutions or modifications according to the technical scheme of the present invention and the inventive concept thereof, and should be covered by the scope of the present invention.

Claims

1. The utility model provides a harbour machinery gyration position detection device, includes mounting bracket (1) of fixed mounting on mechanical pedestal (3), and installs follower (4) on mechanical rotating member (8), limiting rail (11) are installed to the inside bottom of mounting bracket (1), and limiting rail's (11) top slidable mounting has movable block (2), the top fixed mounting of movable block (2) has detection casing (7), and detects the side of casing (7) and install traction baffle (5) and fixing base (6) in proper order, detection controller (10) are installed in the outside of mounting bracket (1), characterized in that, rotate between traction baffle (5) and fixing base (6) and install detection roller (20) with follower (4) meshing transmission, and still install balance mechanism (22) with follower (4) surface rolling connection between traction baffle (5) and fixing base (6), driving mechanism (21) are installed to the bottom of detection roller (20), and driving mechanism's (21) bottom installs follower (12), and follower (12) surface is provided with and detects annular groove (6) and install between array (9) and the setting up between annular detection groove (7), and internally mounted of mounting groove (9) has link gear (17) that can control the activity, the tip and the follower (12) surface roll of link gear (17) are connected, backup pad (15) are still installed to the inside of mounting groove (9), and signal induction contact (14) are all installed to the both sides of backup pad (15), be provided with contact excitation mechanism (16) between the outside of backup pad (15) and the bottom of link gear (17), install displacement compensation mechanism (13) between the inside of mounting bracket (1) and detection casing (7).

2. The harbour machinery gyration position detection device according to claim 1, characterized in that the displacement compensation mechanism (13) comprises a guide slide rail (1301) and a stepping motor (1303), a bidirectional screw rod (1302) in transmission connection with the stepping motor (1303) is installed in the guide slide rail (1301), compensation pieces in synchronous movement are screwed at two outer ends of the bidirectional screw rod (1302), and a compensation push rod (1304) is hinged between the compensation pieces and the detection shell (7).

3. The harbour machinery gyration position detection apparatus according to claim 2, wherein the compensation member in the displacement compensation mechanism (13) is composed of a sleeve (1306), a movable member (1305) and a stabilizing spring (1307), and the movable member (1305) is disposed inside the sleeve (1306) through the stabilizing spring (1307).

4. The harbour machinery gyration position detection apparatus according to claim 1, wherein the linkage mechanism (17) comprises a linkage limiting sleeve (1701), a movable bolt (1702) is slidably mounted in the linkage limiting sleeve (1701), a push spring (1703) is mounted between both ends of the linkage limiting sleeve (1701) and the movable bolt (1702), one end of the movable bolt (1702) close to the follower wheel (12) is in rolling connection with a rolling ball (1704), and the rolling ball (1704) is in rolling connection with the surface of the follower wheel (12).

5. The harbour machinery turning position detection device according to claim 4, wherein the contact excitation mechanism (16) comprises a plurality of meshing gears (1602) rotatably installed in the installation groove (9), a linkage rack (1603) fixedly installed at the lower end of the linkage mechanism (17), an excitation member (1601) slidably installed at the outer side of the support plate (15), and the meshing gears (1602) are arranged between the linkage rack (1603) and the excitation member (1601) in a meshing connection.

6. The harbour machinery gyration position detection apparatus according to claim 1, wherein the transmission mechanism (21) comprises a main chain wheel (2101) arranged at the bottom of the detection roller (20), and a driven chain wheel (2102) arranged at the upper end of the follower wheel (12), and a transmission chain (2103) is arranged between the main chain wheel (2101) and the driven chain wheel (2102).

7. The harbour machinery gyration position detection apparatus according to claim 1, wherein the balancing mechanism (22) comprises a balancing groove (2207) arranged on the surfaces of the traction baffle plate (5) and the fixed seat (6), and a balancing weight (2201) slidably mounted between the traction baffle plate (5) and the fixed seat (6), a balancing bracket (2206) is rotatably mounted at two ends of one side of the balancing weight (2201), a balancing roller (2204) positioned at two sides of the detection roller (20) is mounted at the other end of the balancing bracket (2206), two ends of the balancing roller (2204) are slidably connected with the balancing groove (2207) respectively, a compressing torsion spring (2202) is mounted between the balancing bracket (2206) and the balancing weight (2201), and a damping rod (2203) and a pressure sensor (2205) are mounted between the other side of the balancing bracket (2206) and the detection housing (7).

8. The harbour machinery gyration position detection apparatus according to claim 7, characterized in that the outer end of the traction baffle (5) is provided with a traction mechanism (19), and the top of the follower ring (4) is provided with a convex ring (18) adapted to the traction mechanism (19).

9. The harbour machinery gyration position detection apparatus according to claim 8, wherein the traction mechanism (19) comprises a connecting rod (1901) and a rolling ring (1902), a movable cavity is arranged in the rolling ring (1902), a traction ring (1903) is arranged at the bottom end of the connecting rod (1901), and conical springs (1904) are arranged between the top and the bottom of the traction ring (1903) and the rolling ring (1902).