CN106690953B

CN106690953B - Frequency conversion massage rocking chair

Info

Publication number: CN106690953B
Application number: CN201611256906.5A
Authority: CN
Inventors: 曹蕾蕾; 曹露露; 周松昌; 王其军
Original assignee: Changan University
Current assignee: Changan University
Priority date: 2016-12-30
Filing date: 2016-12-30
Publication date: 2023-03-24
Anticipated expiration: 2036-12-30
Also published as: CN106690953A

Abstract

The invention discloses a variable-frequency massage rocking chair which comprises supporting legs and a seat, wherein the supporting legs comprise front legs, rear legs and armrest plates, the inner sides of the armrest plates are symmetrically provided with first slide ways, and the inner sides of the rear legs are symmetrically provided with second slide ways; the seat comprises a seat back, a seat surface and a pedal plate, wherein sliding frames are symmetrically arranged on two sides of the seat surface, two ends of each sliding frame are fixed on the supporting frame, a first pulley is arranged on each sliding frame, and the first pulley is assembled in the first slide way; the rear end of the supporting frame is symmetrically provided with a second pulley, and the second pulley is assembled in the second slideway; the chair back comprises a pair of back frames with mutually connected ends, third slide ways are symmetrically arranged on the back frames, first massage idler wheels are arranged between the back frames and assembled on a first wheel shaft, and third pulleys are arranged at two ends of the first wheel shaft. The rocking chair has adjustable frequency conversion, integrates leisure and body building, and is convenient to carry.

Description

Frequency conversion massage rocking chair

Technical Field

The invention relates to a rocking chair, in particular to a variable-frequency massage rocking chair capable of adjusting the rocking frequency and having a massage function.

Background

Modern fast-paced and high-stress life leads people to fatigue after busy work in one day, so that healthy and leisure life style and fashionable and entertaining life concepts become popular life targets and subjects. Rocking chairs are common in families, are good relaxation tools, and can be relaxed and have good rest when a user sits on the rocking chair.

The existing rocking chair in the market at present mainly adopts a four-bar mechanism, and the structure mainly has the following problems: 1. the mechanism has more and complicated components, which not only affects the arrangement and the beauty of the whole mechanism, but also causes the overall quality of the product to be overlarge; 2. the length of the rod piece is limited due to the spatial position, so that the rocking amplitude of the rocking chair is small, and the frequency is not easy to control; 3. when the stress of some instantaneous rod pieces is suddenly increased, the product is very easy to damage; the existing various massage leisure instruments are generally higher in price and complex and heavy in overall structure, so that the massage leisure instruments cannot be popularized.

Disclosure of Invention

In view of the above problems in the prior art, an object of the present invention is to provide a variable frequency massage rocking chair, which combines massage leisure with body building, and provides an ideal relaxing tool for users.

In order to realize the task, the invention adopts the following technical scheme:

a frequency conversion massage rocking chair comprises supporting legs and a seat, wherein the supporting legs comprise a pair of front legs, a pair of rear legs and a pair of handrail plates, the front legs are connected with the handrail plates, the rear legs are movably connected with the handrail plates, and the handrail plates are positioned above the front legs and the rear legs; the inner sides of the armrest plates are symmetrically provided with first slide ways, and the inner sides of the rear legs are symmetrically provided with second slide ways;

the seat comprises a chair back, a chair surface and a pedal, wherein the chair back is movably connected with the chair surface, and the pedal is arranged at the front end of the chair surface; the chair surface comprises a pair of supporting frames with the front ends connected with each other, a seat plate is arranged on each supporting frame, and the supporting frames are connected through a plurality of supporting rods; the two sides of the chair surface are symmetrically provided with sliding frames, the two ends of each sliding frame are fixed on the supporting frame, the sliding frames are provided with first pulleys, and the first pulleys are assembled in the first slide ways; the rear end of the supporting frame is symmetrically provided with a second pulley, and the second pulley is assembled in the second slideway; the chair back comprises a pair of back frames with mutually connected ends, third slide ways are symmetrically arranged on the back frames, first massage idler wheels are arranged between the back frames and assembled on a first wheel shaft, third pulleys are arranged at two ends of the first wheel shaft, and the third pulleys are assembled in the third slide ways.

Further, first slide, second slide be arc slide, wherein, first slide is divided into first ascending section, decline section and the ascending section of second from the rear end to the front end.

Further, the sliding frame comprises two sliding rods with connected ends, and the first pulley is arranged at the joint of the two sliding rods.

Furthermore, the first slide way and the second slide way are both detachably provided with a stop block.

Furthermore, a pedal connecting plate is movably mounted at the front end of the chair surface, and the pedal is arranged at the lower end of the pedal connecting plate; the pedal connecting plate is provided with a second massage roller wheel, the second massage roller wheel is arranged on a second wheel shaft, and the second wheel shaft can slide on the pedal connecting plate.

Furthermore, lock wheels are symmetrically arranged on the side face of the chair back and are assembled in the first slide way; the lock wheel comprises a pin shaft and a support roller, a pair of limiting blocks is arranged at one end of the pin shaft, and the support roller is arranged between the limiting blocks; the pin shaft is sleeved with a locking sleeve, a pair of insertion rods are arranged on the side face of the locking sleeve, and insertion holes matched with the insertion rods are distributed in the first slide way.

Furthermore, the chair back and the chair seat are movably connected by adopting an axial locking device, the axial locking device comprises an adjusting shaft, the side surface of the chair seat is provided with a through hole, the lower end of the chair back is positioned between a pair of supporting frames of the chair seat, one end of the adjusting shaft penetrates through the through hole and is fixed on the chair back, and the other end of the adjusting shaft is provided with a locking gear; the locking gear is provided with a locking cutting sleeve which is of an arc structure, the side surface of the locking cutting sleeve is provided with a locking cutting tooth matched with the locking gear, and the locking cutting sleeve is arranged on the chair surface.

Furthermore, a fixing plate is arranged on the side surface of the supporting frame, a pin hole is formed in the fixing plate, an adjusting pin is assembled in the pin hole, and a return spring is sleeved on the adjusting pin; the lower end of the adjusting pin is hinged with the end part of the locking clamping sleeve, and a rotating shaft is arranged on the side surface of the support frame and connected with the locking clamping sleeve.

Compared with the prior art, the invention has the following technical characteristics:

1. the rocking chair can adjust the rocking frequency to meet different requirements of individuals; the massage of the back and the thigh parts can be realized through the massage mechanism; the leisure abdomen-contracting movement can be realized through the axial locking device, and the abdomen-contracting amplitude can be freely adjusted so as to meet the waist-thinning body-building requirements of different degrees;

2. the rocking chair utilizes the specific slide rail (cycloid slide rail) to realize the rocking motion with specific requirements, is succession and improvement of the traditional rocking chair, and is different from the prior rocking chair; the double-pulley mechanism is adopted to simply and skillfully realize the function of combining massage and swing. The swing mechanism is fused into simple components such as legs, an armrest frame and the like of the chair, and various slideways and components are fused into the legs, the armrest frame and the backrest of the chair, so that the structure is greatly simplified;

3. the folding portable function is realized through the limiting rotating shaft, and the folding portable rotary table is used in outdoor leisure occasions such as beach, parks and the like without being limited by places. All functions of the device are realized by skillfully applying sliding rail restraint and a double-pulley mechanism, and the device has the advantages of few mechanisms, simple structure, light weight, convenience in carrying and the like.

Drawings

FIG. 1 is a schematic diagram of the track of a first pulley and a second pulley during movement;

FIG. 2 is a schematic diagram of an equivalent four-bar configuration;

FIG. 3 is a schematic view of the cycloid locus of the first and second pulleys during the seat rocking motion;

FIG. 4 is a schematic view of the overall structure of the present invention;

FIG. 5 is a perspective schematic view of the side view structure of the present invention;

FIG. 6 is a schematic view of a frame structure of the seat portion;

FIG. 7 is a schematic view of the folded frame of the chair;

FIG. 8 is a schematic view of a leg portion;

FIG. 9 is a schematic view of the folded rear legs;

FIG. 10 is a schematic view of the lock wheel;

FIG. 11 is a schematic structural view of an axial locking device;

the reference numbers in the figures represent: a-equivalent arc one, B-equivalent arc two, C-equivalent four-bar mechanism, D-cycloidal one, E-cycloidal two, 1-rear leg, 2-front leg, 3-handrail plate, 4-backrest frame, 5-backrest plate, 6-first slideway, 7-carriage, 8-third slideway, 9-first massage roller, 10-race, 11-support frame, 12-foot pedal, 13-foot pedal connecting plate, 14-second massage roller, 15-axial locking device, 16-seat plate, 17-lock wheel, 18-first pulley, 19-second pulley, 20-second slideway, 21-third massage roller, 22-lock sleeve, 23-insertion rod, 24-pin shaft, 25-support roller, 26-stopper, 27-adjustment pin, 28-return spring, 29-fixed plate, 30-stopper groove, 31-stopper block, 32-torque spring, 33-lock sleeve, 34-rotation shaft, 35-lock shaft, 36-adjustment shaft, 37-gear.

Detailed Description

Following the above technical solution, as shown in fig. 1 to 11, the present invention provides a variable frequency massage rocking chair, which comprises a pair of front legs 2 connected to each other, a pair of rear legs 1 connected to each other, and a pair of armrest plates 3 connected to each other, as shown in fig. 9 and 10, the structure of the legs can be clearly shown, and reinforcing rods are provided between the front legs 2, between the rear legs 1, and between the armrest plates 3, so as to perform the connecting and fixing functions. In the supporting legs, a front leg 2 is fixedly connected with an armrest plate 3, a rear leg 1 is movably connected with the armrest plate, specifically, the rear leg 1 is connected with the armrest plate 3 by adopting a limit rotating shaft, when the supporting legs are in a working state, the rear leg 1 and the front leg 2 form a splayed structure, stable support is provided for the whole device, and the limit rotating shaft is positioned at the maximum stroke; when the whole rocking chair is folded, the rear legs 1 can be rotated towards the front legs 2, and the structure shown in figure 10 is formed, namely, the limit rotating shaft only allows the rear legs 1 to rotate forwards. The armrest plate 3 is positioned above the front leg 2 and the rear leg 1; the inner sides of the armrest plates 3 are symmetrically provided with first slide ways 6, and the inner sides of the rear legs 1 are symmetrically provided with second slide ways 20;

in the scheme, the first slide way 6 and the second slide way 20 are both arc-shaped slide ways, wherein the first slide way 6 is divided into a first ascending section, a descending section and a second ascending section from the rear end to the front end; that is, the first slideway 6 can be regarded as being composed of three arc slideways, and the three arc slideways are in smooth transition, so that the whole first slideway 6 is in a wave-shaped structure.

The seat comprises a chair back, a chair surface and a pedal 12, wherein the chair back is connected with the chair surface through an axial locking device 15, and the axial locking device 15 is used for adjusting the angle between the chair back and the chair surface so as to adapt to the actual requirements of different users; the chair back is arranged at a position 1/2-1/3 away from one end of the chair surface; the pedal 12 is arranged at the front end of the chair surface; the seat comprises a pair of supporting frames 11 with the front ends connected with each other, a seat plate 16 is arranged on each supporting frame 11, the seat plate 16 is made of a soft plate body, and the supporting frames 11 are connected through a plurality of supporting rods and used for supporting the seat plate 16; the two sides of the chair surface are symmetrically provided with sliding frames 7, the two ends of each sliding frame 7 are fixed on the supporting frame 11, the sliding frames 7 are provided with first pulleys 18, and the first pulleys 18 are assembled in the first slide ways 6; the rear end of the supporting frame 11 is symmetrically provided with a second pulley 19, and the second pulley 19 is assembled in the second slideway 20; the chair back comprises a pair of back frames 4 with mutually connected ends, third slide ways 8 are symmetrically arranged on the back frames 4, first massage idler wheels 9 are arranged between the back frames 4, the first massage idler wheels 9 are assembled on first wheel shafts, third pulleys are arranged at two ends of the first wheel shafts, and the third pulleys are assembled in the third slide ways 8.

Specifically, the backrest frame 4 is provided with a backrest plate 5 for supporting the back of the user when the user sits on the seat. The backrest plate 5 is provided with a wheel groove 10 for exposing the first massage roller 9. Another function of the wheel groove 10 is to limit the stroke of the first massage roller 9. The first massage roller 9 is mounted by a first wheel shaft and can rotate on the first wheel shaft, and the end part of the first wheel shaft is provided with a third pulley, so that the whole first wheel shaft can move in the third slideway 8. Thus, when the rocking chair moves, the first massage rollers 9 rotate and move along the chair back, and the back can be massaged more fully.

As shown in fig. 5 and 6, in this embodiment, the carriage 7 includes two slide bars connected at their ends, and the first pulley 18 is mounted at the joint of the two slide bars.

As shown in fig. 4 and 6, a pedal connecting plate 13 is movably mounted at the front end of the seat, and the pedal 12 is arranged at the lower end of the pedal connecting plate 13; the pedal connecting plate 13 is provided with a second massage roller 14, the second massage roller 14 is assembled on a second wheel shaft, and the second wheel shaft can slide on the pedal connecting plate 13, namely, the installation mode of the second massage roller 14 is the same as that of the first massage roller 9, which is not described herein. The second massage roller 14 functions to massage the lower leg portion of the user. In addition, a third massage roller 21 for massaging the sole portion is provided on the foot rest 12. The pedal connecting plate 13 and the seat surface and the pedals 12 are also mounted by adopting limiting rotating shafts, wherein the pedal connecting plate 13 can rotate towards the bottom of the seat surface (clockwise), and the pedals 12 can rotate anticlockwise, so that the seat part can be folded into the state shown in figure 7, and the seat is convenient to transfer and carry.

When the rocking chair is used, a user sits on the chair and leans against the chair back. When the gravity center of the user changes, the balance of the seat changes, and the seat begins to swing; the first pulley 18 rolls back and forth in the first slideway 6 and the second pulley 19 rolls back and forth in the second slideway 20, as shown in figure 3, which is a schematic view of the rocking process. Because the first slideway 6 and the second slideway 20 are both arc slideways, and the first slideway 6 adopts a wave-type arc design, under the combined action of the pulleys and the slideways, when a user swings, the track of the first pulley 18 is a first cycloid, and the track of the second pulley 19 is a second cycloid, as shown in fig. 3; the lengths of the cycloid I and the cycloid II are changed by adjusting the lengths of the cycloid I and the cycloid II, so that the rocking frequency of the seat is changed. Specifically, varying the distance between the first and

second pulleys

18, 19 may vary the amplitude of the rocking of the seat to affect the rocking frequency of the seat; in the scheme, the positions of the first pulley 18 and the second pulley 19 can be adjusted, namely mounting holes are distributed on the support frame 11 and the sliding frame 7, the first pulley 18 and the second pulley 19 are mounted by bolts, and more swinging frequencies and amplitudes can be realized by adjusting the mounting positions of the first pulley 18 and the second pulley 19. In addition, stoppers may be detachably provided in the first and

second slideways

6 and 20 by bolts to limit the traveling positions of the first and

second pulleys

18 and 19.

As shown in fig. 1 and 2, the above-mentioned rocking mechanism is an equivalent four-bar mechanism, and here, two sliding ways are used to replace the traditional four-bar mechanism, and perform the motion equivalent to the four-bar mechanism. The trajectories of the first pulley 18 and the second pulley 19 are respectively an equivalent arc I and an equivalent arc II.

As shown in fig. 5, 6 and 10, in the present solution, in order to improve the structural stability of the whole seat portion, lock wheels 17 are symmetrically arranged on the side surface of the seat back, and the lock wheels 17 are assembled in the first slide ways 6; the lock wheel 17 comprises a pin shaft 24 and a support roller 25, a pair of limiting blocks 26 is arranged at one end of the pin shaft 24, and the support roller 25 is arranged between the limiting blocks 26; the pin shaft 24 is sleeved with a locking sleeve 22, the side surface of the locking sleeve 22 is provided with a pair of insertion rods 23, and the first slideway 6 is distributed with insertion holes matched with the insertion rods 23. When the seat swings back and forth, the first pulley 18 and the supporting roller 25 slide in the first slideway 6 together, so that the pressure of the back to the chair back is not completely concentrated at the joint of the chair back and the chair seat, but is shared by the supporting roller 25; another important function of the locking wheel 17 is that when the user does not want the seat part to swing, the user can push the locking sleeve 22 towards the seat plate, so that the insertion rod 23 on the locking sleeve 22 is inserted into the insertion holes distributed on the first slideway 6, and the pin 24 is fixed with the first slideway 6, at this time, the supporting roller 25 cannot roll in the first slideway 6, and the position of the whole seat is fixed. When the rocking is desired to continue, the locking sleeve 22 is pulled outward, so that the insertion rod 23 is separated from the insertion hole.

When different users use the rocking chair, the requirements on the inclination degree of the chair back, namely the angle between the chair back and the chair surface, are different, and when the users lie on the chair, the users hope to adjust the angle of the chair back so as to make the bodies more comfortable. Therefore, the axial locking device 15 is adopted in the scheme, so that the seat can meet the actual requirements of users better, and the effect of body building can be achieved, namely, when the angles of the seat and the chair back are different, the users can perform leisure abdominal exercise. In order to realize the function, in the scheme, as shown in fig. 11, the chair back and the chair seat are movably connected by an axial locking device 15, the axial locking device 15 comprises an adjusting shaft 36, a through hole is formed in the side surface of the chair seat, the lower end of the chair back is positioned between a pair of supporting frames 11 of the chair seat, one end of the adjusting shaft 36 passes through the through hole and is fixed on the chair back, a locking gear 37 is installed at the other end of the adjusting shaft 36, namely, the adjusting shaft 36, the locking gear 37 and the chair back are fixed together, the through hole plays a supporting role, and the adjusting shaft 36 can rotate in the through hole; bearings may also be lined inside the through-holes to distribute the pressure. The locking cutting sleeve 33 is assembled on the locking gear 37, the locking cutting sleeve 33 is of an arc-shaped structure, the locking cutting sleeve 33 is provided with locking cutting teeth matched with the locking gear 37 on the side face, and the locking cutting sleeve 33 is installed on the chair seat. That is, the locking ferrule 33 is integral with the seat and the locking gear 37 is integral with the seat back. Then the locking gear 37 cannot rotate any further after the locking teeth on the locking ferrule 33 snap onto the locking gear 37, and the angle between the seat back and the seat surface is fixed. When the angle needs to be adjusted, the locking clamping sleeve 33 is lifted upwards, so that the locking clamping tooth 3535 and the locking gear 37 are separated, the chair back can rotate at the moment, and the chair is fixed after the position is rotationally adjusted.

In the axial locking device 15, a limiting groove 30 is formed in the locking gear 37, the limiting groove 30 penetrates through the locking gear 37, a limiting block 31 is installed in the limiting groove 30, and the limiting block 31 is fixed on the support frame 11 of the seat, that is, the limiting block 31 and the seat are integrated. The rotation amplitude is affected by the limit groove 30 during the rotation of the lock gear 37 following the seat back, which is to protect the axial lock device 15 so that the rotation amplitude is limited within a certain range. The adjusting shaft 36 is sleeved with a torque spring 32, and one end of the torque spring 32 is connected with the limiting fixture block 31 for assisting the chair back to reset.

In order to make the above adjusting process more convenient, in the present solution, the side surface of the supporting frame 11 is provided with a fixing plate 29, a pin hole is opened on the fixing plate 29, an adjusting pin 27 is assembled in the pin hole, and a return spring 28 is sleeved on the adjusting pin 27; the lower end of the adjusting pin 27 is hinged with the end part of the locking clamping sleeve 33, the side surface of the support frame 11 is provided with a rotating shaft 34, and the rotating shaft 34 is connected with the locking clamping sleeve 33, so that when the adjusting pin 27 is pressed down, the locking clamping sleeve 33 is lifted upwards under the action of a lever principle; when the adjustment pin 27 is released, the return spring 28 returns the adjustment pin 27 and the locking ferrule 33.

Compared with the prior art, the rocking chair has the advantages that the rocking motion with specific requirements is realized by using the specific slide rail (cycloid slide rail), namely the traditional rocking chair is inherited and improved, and the rocking chair is different from the existing rocking chair; the double-pulley mechanism is adopted to simply and skillfully realize the function of combining massage and swing. In the scheme, various mechanisms are ingeniously fused into simple components such as legs, an armrest frame and the like of a chair, so that the structure is greatly simplified. The product of the invention combines technology and art, is green and healthy, meets the requirements of life and market, is economic and convenient, integrates a skillful and simple mechanism (a cycloid sliding rail frame) for massaging and body building on a rocking chair (traditional furniture), can adjust the inherent swing period, and is easy to fold and store. The 'body-building sport' is moved home, and the identity of the novel and old traditional furniture is naturally and reasonably integrated into the family, natural body-building and natural rock life.

Claims

1. A frequency conversion massage rocking chair comprises supporting legs and a seat, wherein the supporting legs comprise a pair of front legs (2) which are connected with each other, a pair of rear legs (1) which are connected with each other and a pair of handrail plates (3) which are connected with each other, and the frequency conversion massage rocking chair is characterized in that the front legs (2) are fixedly connected with the handrail plates (3), the rear legs (1) are movably connected with the handrail plates (3), and the handrail plates (3) are positioned above the front legs (2) and the rear legs (1); the inner sides of the handrail plates (3) are symmetrically provided with first slide ways (6), and the inner sides of the rear legs (1) are symmetrically provided with second slide ways (20);

the chair comprises a chair back, a chair surface and a pedal (12), wherein the chair back is movably connected with the chair surface, and the pedal (12) is arranged at the front end of the chair surface; the chair surface comprises a pair of supporting frames (11) with the front ends connected with each other, a seat plate (16) is arranged on each supporting frame (11), and the supporting frames (11) are connected through a plurality of supporting rods; the two sides of the chair surface are symmetrically provided with sliding frames (7), the two ends of each sliding frame (7) are fixed on the supporting frame (11), the sliding frames (7) are provided with first pulleys (18), and the first pulleys (18) are assembled in the first slide ways (6); the rear end of the supporting frame (11) is symmetrically provided with second pulleys (19), and the second pulleys (19) are assembled in the second slide ways (20); the chair back comprises a pair of back rest frames (4) with mutually connected ends, third slide ways (8) are symmetrically formed in the back rest frames (4), first massage rollers (9) are arranged between the back rest frames (4), the first massage rollers (9) are assembled on a first wheel shaft, third pulleys are arranged at two ends of the first wheel shaft, and the third pulleys are assembled in the third slide ways (8);

the first slideway (6) and the second slideway (20) are arc-shaped slideways, wherein the first slideway (6) is divided into a first ascending section, a descending section and a second ascending section from the rear end to the front end;

the sliding frame (7) comprises two sliding rods with connected ends, and the first pulley (18) is arranged at the joint of the two sliding rods.

2. The variable-frequency massage rocking chair according to claim 1, wherein a pedal connecting plate (13) is movably mounted at the front end of the chair surface, and the pedal (12) is arranged at the lower end of the pedal connecting plate (13); the pedal connecting plate (13) is provided with a second massage roller (14), the second massage roller (14) is arranged on a second wheel shaft, and the second wheel shaft can slide on the pedal connecting plate (13).

3. The variable-frequency massage rocking chair as claimed in claim 1, wherein the side surfaces of the chair back are symmetrically provided with lock wheels (17), and the lock wheels (17) are assembled in the first slideway (6); the lock wheel (17) comprises a pin shaft (24) and a support roller (25), one end of the pin shaft (24) is provided with a pair of limiting blocks (26), and the support roller (25) is arranged between the limiting blocks (26); the locking device is characterized in that the pin shaft (24) is sleeved with a locking sleeve (22), a pair of insertion rods (23) is arranged on the side face of the locking sleeve (22), and insertion holes matched with the insertion rods (23) are distributed in the first slide way (6).

4. The variable-frequency massage rocking chair according to claim 1, wherein the chair back and the chair surface are movably connected by an axial locking device (15), the axial locking device (15) comprises an adjusting shaft (36), a through hole is formed in the side surface of the chair surface, the lower end of the chair back is positioned between a pair of supporting frames (11) of the chair surface, one end of the adjusting shaft (36) passes through the through hole to be fixed on the chair back, and a locking gear (37) is installed at the other end of the adjusting shaft (36); the locking gear (37) is provided with a locking clamping sleeve (33), the locking clamping sleeve (33) is of an arc-shaped structure, the side surface of the locking clamping sleeve (33) is provided with a locking clamping tooth matched with the locking gear (37), and the locking clamping sleeve (33) is arranged on the chair surface.

5. The variable-frequency massage rocking chair according to claim 4, wherein a fixing plate (29) is arranged on the side surface of the supporting frame (11), a pin hole is formed in the fixing plate (29), an adjusting pin (27) is assembled in the pin hole, and a return spring (28) is sleeved on the adjusting pin (27); the lower end of the adjusting pin (27) is hinged with the end part of the locking clamping sleeve (33), a rotating shaft (34) is arranged on the side surface of the support frame (11), and the rotating shaft (34) is connected with the locking clamping sleeve (33).