CN111946033B

CN111946033B - Hand-held floor tile crack beautifying agent filling device for building decoration

Info

Publication number: CN111946033B
Application number: CN202010828348.5A
Authority: CN
Inventors: 谢东明
Original assignee: Changchun Hongyuan Construction Co ltd
Current assignee: Changchun Hongyuan Construction Co.,Ltd.
Priority date: 2020-08-18
Filing date: 2020-08-18
Publication date: 2021-08-20
Anticipated expiration: 2040-08-18
Also published as: CN111946033A

Abstract

The invention discloses a hand-held floor tile crack beautifying agent filling device for building decoration, relates to the technical field of building decoration, and solves the problems that the existing manual crack beautifying agent filling process is complex, and the crack beautifying agent cannot be uniformly filled into the cracks of floor tiles. A hand-held floor tile crack beautifying agent filling device for building decoration comprises a bracket, a handle, an extrusion box, a conveying pipe, a supporting rod, a scraping frame, a moving wheel and the like; the fixed both sides of locating the support of handle, a side of extrusion case and with the extrusion case intercommunication is located to the conveyer pipe is fixed, a side of extrusion case is fixed and is equipped with two parallel bracing pieces, strike off the fixed one end of locating two bracing pieces of frame. When the seam beautifying agent filling machine is used, the process of filling the seam beautifying agent can be reduced, the filling efficiency of the seam beautifying agent is improved, redundant seam beautifying agents on two sides of a seam can be scraped, and meanwhile, the seam beautifying agent in the seam can be rolled and compacted in time after the seam beautifying agent is filled.

Description

Hand-held floor tile crack beautifying agent filling device for building decoration

Technical Field

The invention relates to the technical field of building decoration, in particular to a hand-held floor tile crack beautifying agent filling device for building decoration.

Background

The seam beautifying agent is a semi-fluid liquid which is composed of a high-tech novel polymer and high-grade pigment, has luster and rich, natural and fine color, has chroma and decoration which are obviously higher than those of the traditional seam filling agent, and can bring better integral effect to the wall surface or the ground surface by filling the seam beautifying agent.

The traditional filling method of the seam beautifying agent is that workers firstly clean gaps of the floor tiles, then take out the seam beautifying agent with the color corresponding to the color of the floor tiles, open the seam beautifying agent and put the seam beautifying agent into a glue gun, the glue gun is used for driving the seam beautifying agent into the gaps of the floor tiles, the seam beautifying agent needs to be manually scraped flat after the seam beautifying agent is filled, and the seam beautifying agent left on two sides of the gaps of the floor tiles is wiped off, so that the smoothness of the floor tiles after the seam beautifying agent is filled is guaranteed. The filling method of the seam beautifying agent has complex working procedures and needs to consume a large amount of manpower, and the manual filling of the seam beautifying agent can not ensure that the seam beautifying agent is uniformly filled into the seam.

Disclosure of Invention

The invention aims to provide a hand-held floor tile crack beautifying agent filling device for building decoration, which can uniformly fill crack beautifying agents into ground seams, scrape redundant crack beautifying agents on two sides of the ground tile seams and simultaneously roll the crack beautifying agents in the ground seams so that the crack beautifying agents can be better attached to the floor tiles, and the problems in the background technology are solved.

The technical scheme of the invention is as follows: the utility model provides a hand-held ceramic tile joint compound filling device for building decoration, includes support, handle, extrusion case, conveyer pipe, bracing piece, strikes off the frame, removes the wheel, joint compound extrusion mechanism, joint compound extrusion control mechanism and leaks the material mechanism, the handle is fixed to be located the both sides of support, the extrusion case is fixed to be located on the support, a conveyer pipe is fixed to be located one side of extrusion case and is communicated with the extrusion case, be equipped with the check valve in the conveyer pipe, a side of extrusion case is fixed and is equipped with two parallel bracing pieces, strike off the frame and fix the one end of two bracing pieces, the one end rotary type of support is equipped with two and removes the wheel, joint compound extrusion mechanism locates on support and the extrusion case, joint compound extrusion control mechanism locates on the extrusion case and is connected with joint compound extrusion mechanism, leak the material mechanism and locate on the extrusion case.

Further, beautiful seam agent extrusion mechanism includes stripper plate, lifting screw, lifting nut, link, arc slide rail, arc slider and power unit, the stripper plate slidingtype is located in the extrusion case, the lifting screw rotary type is located on the stripper plate and is passed the extrusion case, the lifting nut spiro union is on the lifting screw, the link is fixed and is located a side on stripper case upper portion, the fixed one end of locating the link of arc slide rail, the arc slider slidingtype is located on the arc slide rail, power unit locates on support and the lifting nut.

Further, power unit includes gear wheel, backup pad, transmission shaft, drive gear, pinion and transmission side gear, the gear wheel is fixed to be located on the lifting nut and a side of gear wheel and a side rigid coupling of arc slider, a side of support is fixed to be located to the backup pad, the transmission shaft passes through the bearing and locates in the backup pad, drive gear is fixed to be located on the transmission shaft, the pinion is fixed to be located the one end of transmission shaft and meshes with the gear wheel, transmission side gear is fixed to be located one of them side that removes the wheel and meshes with drive gear.

Further, beautiful seam agent extrusion control mechanism includes deflector, connecting plate, fixation nut and adjusting screw, on the link was located to the deflector slidingtype and the deflector can respectively with lifting screw and gear wheel contact, the connecting plate is fixed to be located on the deflector, the fixed side of locating the extrusion case of fixation nut, adjusting screw spiro union is in fixation nut and adjusting screw's one end is connected with the connecting plate rotary type.

Furthermore, the material leaking mechanism comprises a material leaking frame, a lifting baffle and a first expansion spring, the material leaking frame is fixedly arranged at one end of the extrusion box and is communicated with the extrusion box, two material leaking grooves are formed in the material leaking frame, the lifting baffle is slidably arranged in the material leaking frame, and the first expansion spring is arranged between one side face of the lifting baffle and the material leaking frame.

Further comprises a filling rolling mechanism which is arranged on one side surface of the extrusion box, the filling and rolling mechanism comprises a sliding frame, a second expansion spring, a rolling wheel, a rotating shaft, a torsion spring, a swinging frame, a scraping plate and a cam, two sliding grooves are arranged on one side surface of the extrusion box, the sliding frame is arranged in the two sliding grooves in a sliding manner, a second expansion spring is arranged between one side surface of the sliding frame and the extrusion box, the rolling wheel is rotatably arranged at one end of the sliding frame, the rotating shaft is arranged on the sliding frame through a bearing, torsion springs are respectively arranged between the two ends of the rotating shaft and the two sides of the sliding frame, the rotating shaft penetrates through the torsion springs, the swing span is fixed to be located on the axis of rotation, strike off the fixed one end of locating the swing span of board and with the rolling wheel contact, cam and the coaxial setting of rolling wheel and cam can contact with the swing span.

The invention has the beneficial effects that: 1. according to the invention, the lifting screw drives the extrusion plate to move downwards, so that the seam beautifying agent in the extrusion box can be extruded into the conveying pipe, the speed of the seam beautifying agent flowing out of the gaps of the floor tiles can be increased, and the filling efficiency of the seam beautifying agent can be improved.

2. According to the invention, the excessive jointing agent filled in the gaps of the floor tiles can be scraped through the scraping frame, so that the floor tiles can be prevented from being stained and stained by the excessive jointing agent adhered to the surfaces of the floor tiles.

3. According to the invention, the rolling wheel can roll the seam beautifying agent filled in the gaps of the floor tiles, so that the seam beautifying agent can be rolled and compacted, and the seam beautifying agent can be better attached to the gaps of the floor tiles; the scraping plate can scrape off the seam beautifying agent adhered to the rolling wheel, so that the accumulation of the seam beautifying agent on the rolling wheel can be reduced.

Drawings

Fig. 1 is a schematic perspective view of a first embodiment of the present invention.

Fig. 2 is a schematic perspective view of a second embodiment of the present invention.

Fig. 3 is a schematic partial perspective view of a first embodiment of the present invention.

Fig. 4 is a partial sectional structural view of the present invention.

Fig. 5 is a schematic partial perspective view of a second embodiment of the present invention.

Fig. 6 is a third partial perspective view of the present invention.

Fig. 7 is a schematic separated perspective structure diagram of the material leaking mechanism of the present invention.

Fig. 8 is a schematic view of a fourth partial perspective structure of the present invention.

Part names and serial numbers in the figure: 1 support, 2 handles, 3 extrusion boxes, 301 conveying pipes, 302 supporting rods, 303 scraping frames, 4 moving wheels, 5 crack agent extrusion mechanisms, 51 extrusion plates, 52 lifting screws, 53 lifting nuts, 54 connecting frames, 55 arc-shaped sliding rails, 56 arc-shaped sliding blocks, 57 large gears, 58 supporting plates, 59 transmission shafts, 510 transmission gears, 511 small gears, 512 transmission side gears, 6 crack agent extrusion control mechanisms, 61 guide plates, 62 connecting plates, 63 fixing nuts, 64 adjusting screws, 7 material leaking mechanisms, 71 material leaking frames, 72 lifting baffles, 73 expansion springs I, 8 filling rolling mechanisms, 81 sliding frames, 82 expansion springs II, 83 rolling wheels, 84 rotating shafts, 85 torsion springs, 86 swinging frames, 87 scraping plates and 88 cams.

Detailed Description

The present invention will be further described with reference to specific examples, which are illustrative of the invention and are not to be construed as limiting the invention.

Example 1

A hand-held floor tile crack beautifying agent filling device for building decoration, as shown in figures 1-8, comprises a support 1, handles 2, an extrusion box 3, a conveying pipe 301, support rods 302, a scraping frame 303, a moving wheel 4, a crack beautifying agent extrusion mechanism 5, a crack beautifying agent extrusion control mechanism 6 and a material leaking mechanism 7, wherein the handles 2 for assisting in pushing the support 1 are fixedly arranged on two sides of the support 1, the extrusion box 3 for storing crack beautifying agent is fixedly arranged on the support 1, the conveying pipe 301 is fixedly arranged on one side surface of the extrusion box 3 and communicated with the extrusion box 3, a one-way valve is arranged in the conveying pipe 301, the conveying pipe 301 is used for conveying the crack beautifying agent in the extrusion box 3 to a gap between floor tiles for filling, two parallel support rods 302 are fixedly arranged on one side surface of the extrusion box 3, the scraping frame 303 for scraping the crack beautifying agent remained on two sides of the ground gap is fixedly arranged at the lower ends of the two support rods 302, the lower extreme rotary type of support 1 is equipped with two and removes wheel 4, be used for squeezing the beautiful seam agent extrusion mechanism 5 in the conveyer pipe 301 with the beautiful seam agent in the extrusion box 3 and locate on support 1 and extrusion box 3, beautiful seam agent extrusion control mechanism 6 is located on extrusion box 3 and is connected with beautiful seam agent extrusion mechanism 5, be used for adding the leaking material mechanism 7 in the extrusion box 3 with beautiful seam agent and locate on extrusion box 3.

Further, the seam beautifying agent extruding mechanism 5 comprises an extruding plate 51, an elevating screw 52, an elevating nut 53, a connecting frame 54, an arc-shaped slide rail 55, an arc-shaped sliding block 56 and a power mechanism, wherein the extruding plate 51 for extruding the seam beautifying agent in the extruding box 3 is slidably arranged in the extruding box 3, the elevating screw 52 is rotatably arranged on the extruding plate 51 and penetrates through the extruding box 3, the elevating nut 53 is screwed on the elevating screw 52, the connecting frame 54 is fixedly arranged on one side surface of the upper part of the extruding box 3, the arc-shaped slide rail 55 is fixedly arranged at one end of the connecting frame 54 and is close to the elevating screw 52, the arc-shaped sliding block 56 is slidably arranged on the arc-shaped slide rail 55, and the power mechanism is arranged on the support 1 and the elevating nut 53.

Further, the power mechanism includes a large gear 57, a supporting plate 58, a transmission shaft 59, a transmission gear 510, a small gear 511, and a transmission side gear 512, the large gear 57 is fixedly disposed on the lifting nut 53, an upper side surface of the large gear 57 is fixedly connected to a bottom side surface of the arc-shaped slider 56, the supporting plate 58 is fixedly disposed on one side surface of the support 1 and above the movable wheel 4, the transmission shaft 59 is disposed on the supporting plate 58 through a bearing, the transmission gear 510 is fixedly disposed on the transmission shaft 59, the small gear 511 is fixedly disposed at a lower end of the transmission shaft 59 and engaged with the large gear 57, and the transmission side gear 512 is fixedly disposed on one side surface of one of the movable wheels 4 and engaged with the transmission gear 510.

Further, the seam beautifying agent extrusion control mechanism 6 for assisting the lifting screw 52 to move upwards and reset comprises a guide plate 61, a connecting plate 62, a fixing nut 63 and an adjusting screw 64, wherein the guide plate 61 is slidably arranged on the connecting frame 54, the guide plate 61 can be respectively contacted with the lifting screw 52 and the large gear 57, the connecting plate 62 is fixedly arranged on the guide plate 61 and is close to the supporting plate 58, the fixing nut 63 is fixedly arranged on one side surface of the extrusion box 3 and is close to the connecting plate 62, the adjusting screw 64 is screwed in the fixing nut 63, and one end of the adjusting screw 64 is rotatably connected with the connecting plate 62.

Further, the material leaking mechanism 7 comprises a material leaking frame 71, a lifting baffle plate 72 and a first expansion spring 73, the material leaking frame 71 is fixedly arranged at the upper end of the extrusion box 3 and is communicated with the extrusion box 3, two material leaking grooves are formed in the material leaking frame 71, the lifting baffle plate 72 is slidably arranged in the material leaking frame 71, the lifting baffle plate 72 can be used for assisting in adding the seam beautifying agent into the extrusion box 3 and blocking the upper end of the material leaking frame 71 after the perfect seam beautifying agent is added, and the first four expansion springs 73 are arranged between the bottom side surface of the lifting baffle plate 72 and the material leaking frame 71.

The actual use process is as follows: when the crack beautifying agent is required to be filled into the gaps between the floor tiles, workers firstly pour the crack beautifying agent onto the lifting baffle plate 72, the lifting baffle plate 72 moves downwards under the action of the gravity of the crack beautifying agent, at the moment, the crack beautifying agent flows into the material leaking frame 71 through the two material leaking grooves and then enters the extrusion box 3, and after all the crack beautifying agent enters the material leaking frame 71, the first telescopic spring 73 pushes the lifting baffle plate 72 to move upwards to reset so as to block the upper part of the material leaking frame 71. After all preparation work is done, a worker can push the whole support 1 to move rightwards through the handle 2, and in the process that the support 1 moves rightwards, the lower end of the conveying pipe 301 needs to be aligned to gaps among floor tiles, so that the seam beautifying agent in the extrusion box 3 can fill the gaps among the floor tiles conveniently. The two moving wheels 4 rolling to the right drive the transmission side gear 512 to rotate, the transmission side gear 512 drives the transmission shaft 59 and the small gear 511 to rotate through the transmission gear 510 engaged with the transmission side gear 512, the small gear 511 drives the lifting nut 53 and the arc-shaped sliding block 56 to rotate through the big gear 57 engaged with the small gear, because the lifting screw 52 is clamped by the guide plate 61, therefore, the lifting nut 53 rotates to drive the lifting screw 52 to move downwards, the lifting screw 52 drives the extrusion plate 51 to move downwards, the extrusion plate 51 moves downwards to extrude the seam beautifying agent in the extrusion box 3, so that the seam beautifying agent can flow into the conveying pipe 301 more quickly, the delivery tube 301 can then deliver the joint compound to the gaps between the tiles for filling, and the scraping frame 303 can scrape off the residual seam beautifying agent on the two sides of the gap after the filling, so that the residual seam beautifying agent is prevented from being stained on the surface of the floor tile to pollute the floor tile.

When the crack sealer in the extrusion box 3 is used up, a worker needs to rotate the adjusting screw 64 to move left, the adjusting screw 64 can drive the guide plate 61 to move left through the connecting plate 62, the guide plate 61 can be separated from the lifting screw 52, the guide plate 61 can clamp the large gear 57 when moving left, at the moment, the lifting nut 53 cannot rotate, the worker can rotate the lifting screw 52 to move upwards for resetting, the lifting screw 52 can drive the extrusion plate 51 to move upwards for resetting, and then the worker can add new crack sealer into the extrusion box 3. After the crack sealer is added, a worker rotates the adjusting screw 64 to move rightwards to reset, the adjusting screw 64 drives the guide plate 61 to move rightwards through the connecting plate 62, the guide plate 61 is in contact with the lifting screw 52 and is separated from the large gear 57, and when the worker pushes the support 1 to move rightwards again, the lifting screw 52 drives the extrusion plate 51 to move downwards to extrude the crack sealer.

Example 2

On the basis of embodiment 1, as shown in fig. 1 and 8, the filling and rolling mechanism 8 for rolling the filled seam beautifying agent is further included, the filling and rolling mechanism 8 is disposed on one side surface of the extrusion box 3, the filling and rolling mechanism 8 includes a sliding frame 81, two extension springs 82, a rolling wheel 83, a rotating shaft 84, a torsion spring 85, a swinging frame 86, a scraping plate 87 and a cam 88, two sliding grooves are disposed on one side surface of the extrusion box 3, the sliding frame 81 is slidably disposed in the two sliding grooves, the sliding frame 81 is close to the conveying pipe 301, two extension springs 82 are disposed between the upper side surface of the sliding frame 81 and the extrusion box 3, the rolling wheel 83 for rolling and compacting the seam beautifying agent is disposed at the lower end of the sliding frame 81, the rotating shaft 84 is disposed on the sliding frame 81 through a bearing, the torsion springs 85 are disposed between the two ends of the rotating shaft 84 and the two sides of the sliding frame 81, and the rotating shaft 84 passes through the torsion springs 85, swing span 86 is fixed to be located on axis of rotation 84, scrape off board 87 and fix the one end of locating swing span 86 and contact with rolling wheel 83, scrape off board 87 and be used for scraping off the beautiful seam agent that is stained with and glues on rolling wheel 83, cam 88 and rolling wheel 83 coaxial setting and cam 88 can contact with swing span 86, cam 88 and swing span 86 cooperation work can drive and scrape off board 87 luffing motion to can drop the beautiful seam shake on scraping off board 87.

The actual use process is as follows: support 1 moves right and can drive rolling wheel 83 and rotate right, rolling wheel 83 can drive cam 88 and rotate, when rolling wheel 83 entered into the ground seam and roll the operation to the beautiful seam agent, carriage 81 can the lapse, extension spring two 82 is tensile downwards, owing to strike off board 87 and rolling wheel 83 contact, so strike off board 87 and can scrape off the beautiful seam agent that glues to on rolling wheel 83, thereby can reduce piling up of beautiful seam agent on rolling wheel 83, also be convenient for rolling wheel 83 can roll the operation to beautiful seam agent at the back. Cam 88 can extrude swing frame 86 at the rotation in-process and upwards swing, and swing frame 86 can drive pivot 84 and rotate certain angle, and when cam 88 no longer extrudeed swing frame 86, torsion spring 85 can drive pivot 84 and rotate and reset, and pivot 84 can drive swing frame 86 and downwards swing and reset, and from this, swing frame 86 can drive scraping board 87 luffing motion to can make the beautiful seam agent on scraping board 87 shaken off. After finishing the rolling operation of the seam beautifying agent, the handle 2 is pushed to enable the rolling wheel 83 to roll to the surface of the floor tile from the seam, and at the moment, the second expansion spring 82 drives the sliding frame 81 to move upwards to reset.

The above examples are merely representative of preferred embodiments of the present invention, and the description thereof is more specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, various changes, modifications and substitutions can be made without departing from the spirit of the present invention, and these are all within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. A walking floor tile crack beautifying agent filling device for building decoration is characterized by comprising a support (1), a handle (2), an extrusion box (3), a conveying pipe (301), supporting rods (302), scraping frames (303), moving wheels (4), a crack beautifying agent extrusion mechanism (5), a crack beautifying agent extrusion control mechanism (6) and a material leakage mechanism (7), wherein the handle (2) is fixedly arranged on two sides of the support (1), the extrusion box (3) is fixedly arranged on the support (1), the conveying pipe (301) is fixedly arranged on one side surface of the extrusion box (3) and communicated with the extrusion box (3), a one-way valve is arranged in the conveying pipe (301), two parallel supporting rods (302) are fixedly arranged on one side surface of the extrusion box (3), the scraping frames (303) are fixedly arranged at one ends of the two supporting rods (302), two moving wheels (4) are rotatably arranged at one end of the support (1), the seam beautifying agent extrusion mechanism (5) is arranged on the support (1) and the extrusion box (3), the seam beautifying agent extrusion control mechanism (6) is arranged on the extrusion box (3) and connected with the seam beautifying agent extrusion mechanism (5), and the material leaking mechanism (7) is arranged on the extrusion box (3);

the seam beautifying agent extruding mechanism (5) comprises an extruding plate (51), an elevating screw rod (52), an elevating nut (53), a connecting frame (54), an arc-shaped sliding rail (55), an arc-shaped sliding block (56) and a power mechanism, wherein the extruding plate (51) is slidably arranged in the extruding box (3), the elevating screw rod (52) is rotatably arranged on the extruding plate (51) and penetrates through the extruding box (3), the elevating nut (53) is screwed on the elevating screw rod (52), the connecting frame (54) is fixedly arranged on one side surface of the upper part of the extruding box (3), the arc-shaped sliding rail (55) is fixedly arranged at one end of the connecting frame (54), the arc-shaped sliding block (56) is slidably arranged on the arc-shaped sliding rail (55), and the power mechanism is arranged on the support (1) and the elevating nut (53);

the power mechanism comprises a large gear (57), a supporting plate (58), a transmission shaft (59), a transmission gear (510), a small gear (511) and a transmission side gear (512), wherein the large gear (57) is fixedly arranged on a lifting nut (53) and one side surface of the large gear (57) is fixedly connected with one side surface of an arc-shaped sliding block (56), the supporting plate (58) is fixedly arranged on one side surface of the support (1), the transmission shaft (59) is arranged on the supporting plate (58) through a bearing, the transmission gear (510) is fixedly arranged on the transmission shaft (59), the small gear (511) is fixedly arranged at one end of the transmission shaft (59) and meshed with the large gear (57), and the transmission side gear (512) is fixedly arranged on one side surface of one of the movable wheels (4) and meshed with the transmission gear (510).

2. The walking type floor tile crack filling device for building decoration according to claim 1, wherein the crack filling agent extrusion control mechanism (6) comprises a guide plate (61), a connecting plate (62), a fixing nut (63) and an adjusting screw (64), the guide plate (61) is slidably disposed on the connecting frame (54) and the guide plate (61) can be respectively contacted with the lifting screw (52) and the bull gear (57), the connecting plate (62) is fixedly disposed on the guide plate (61), the fixing nut (63) is fixedly disposed on one side surface of the extrusion box (3), the adjusting screw (64) is screwed into the fixing nut (63) and one end of the adjusting screw (64) is rotatably connected with the connecting plate (62).

3. The walking type floor tile crack beautifying agent filling device for building decoration according to claim 2, characterized in that the material leaking mechanism (7) comprises a material leaking frame (71), a lifting baffle (72) and a first expansion spring (73), the material leaking frame (71) is fixedly arranged at one end of the extrusion box (3) and is communicated with the extrusion box (3), two material leaking grooves are formed in the material leaking frame (71), the lifting baffle (72) is slidably arranged in the material leaking frame (71), and a plurality of first expansion springs (73) are arranged between one side surface of the lifting baffle (72) and the material leaking frame (71).

4. The hand-held floor tile crack beautifying agent filling device for building decoration according to claim 3, further comprising a filling rolling mechanism (8), wherein the filling rolling mechanism (8) is arranged on one side surface of the extrusion box (3), the filling rolling mechanism (8) comprises a sliding frame (81), a second expansion spring (82), a rolling wheel (83), a rotating shaft (84), a torsion spring (85), a swinging frame (86), a scraping plate (87) and a cam (88), one side surface of the extrusion box (3) is provided with two sliding grooves, the sliding frame (81) is slidably arranged in the two sliding grooves, the second expansion spring (82) is arranged between one side surface of the sliding frame (81) and the extrusion box (3), the rolling wheel (83) is rotatably arranged at one end of the sliding frame (81), the rotating shaft (84) is arranged on the sliding frame (81) through a bearing, be equipped with torsion spring (85) and axis of rotation (84) respectively between the both ends of axis of rotation (84) and the both sides of carriage (81) and pass torsion spring (85), swing span (86) are fixed to be located on axis of rotation (84), scrape off board (87) and fix the one end of locating swing span (86) and contact with rolling wheel (83), cam (88) and rolling wheel (83) coaxial setting and cam (88) can contact with swing span (86).