CN214189465U - Safety tension device for slow-speed belt-retracting automobile - Google Patents

Abstract

The utility model provides a car safety take-up device is taken up at a slow speed, which comprises a base, a handle, winding mechanism and first bandage, handle and winding mechanism locate on the pedestal, install the main pivot by handle drive on the pedestal, first bandage is installed on main pivot and winding mechanism, winding mechanism includes the rolling box, wind spring subassembly and rolling axle, the inner end of first bandage is installed on the rolling axle, the both sides of rolling box are equipped with wind spring subassembly and centrifugal damping mechanism respectively, centrifugal damping mechanism is used for reducing rolling axle slew velocity at the too fast state of first bandage roll-up speed. The utility model has the advantages that: when the low-speed belt-retracting automobile safety tensioning device is used, the centrifugal force generated by the fast rotation of the belt winding shaft throws the movable friction block out to be in contact with the damping housing and generates friction force, the friction force lowers the rotating speed, the higher the rotating speed is, the higher the friction force is, the more obvious the lowering speed is, so that the relatively slow belt-retracting speed is obtained, and the accident that the hook rebounds to hurt people due to the fact that the belt-retracting speed is too fast is avoided.

Description

Safety tension device for slow-speed belt-retracting automobile

Technical Field

The utility model relates to a take-up car safety tension device slowly that is used for vehicles such as car, trailer, aircraft, steamer to the goods implementation is fixed and fasten.

Background

The automobile safety tension device is generally composed of a tension device main machine, a long strap, a short strap and the like. The main machine part adopts the principle of a ratchet mechanism which prevents reverse rotation, a handle is directly used for driving a driving pawl which pushes a ratchet wheel, the ratchet wheel directly drives a main rotating shaft, so that a binding belt wound on the main rotating shaft is tensioned, a stop pawl prevents the ratchet wheel from reversing, certain tension can be kept on the binding belt, and cargoes are bound and fixed. According to different application occasions, the working length of the device is different, so that redundant binding bands always float outside the device, certain potential safety hazards exist, and the binding bands are messy after being used, so that the next use is influenced. There are some products of automatic roll-up binding band in the existing market, utilize scroll spring energy storage to carry out the automatic rolling to bandage and couple, though can solve above-mentioned problem, in the rolling in-process, if the shrink speed is very fast, the metal couple can consequently rebound fast and hit operating personnel, cause the injury to the human body. In conclusion, further improvements to the existing automotive safety tensioner are desired.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that to above-mentioned prior art current situation, provide a can reduce the take-up spool rotational speed during quick receipts area, realize receiving the car safety tension device of taking up slowly.

The utility model provides a technical scheme that above-mentioned technical problem adopted does: this take-up car safety tension device slowly, including pedestal, handle, winding mechanism and first bandage, on the pedestal was located to handle and winding mechanism, install on the pedestal by handle driven main pivot, first bandage is installed on main pivot and winding mechanism, its characterized in that: the tape winding mechanism comprises a tape winding box, a coil spring assembly and a tape winding shaft, the inner end of the first binding tape is mounted on the tape winding shaft, the coil spring assembly and a centrifugal damping mechanism are respectively arranged on two sides of the tape winding box, and the centrifugal damping mechanism is used for reducing the rotation speed of the tape winding shaft in the state that the winding speed of the first binding tape is too high.

The centrifugal damping mechanism can have various structures, and preferably comprises a rotary disc, a damping housing and a movable friction block, wherein the rotary disc can synchronously rotate with the tape winding shaft, the damping housing covers the rotary disc, the movable friction block is arranged on the rotary disc, the outer peripheral surface of the movable friction block and the inner peripheral surface of the damping housing form a friction surface which is matched with each other, and the movable friction block can move to the state that the outer peripheral surface of the movable friction block is contacted with the inner peripheral surface of the damping housing under the action of centrifugal force.

More preferably, the inner circumferential surface of the damper housing is a circumferential surface, and correspondingly, the outer circumferential surface of the movable friction block is an arc surface.

As a preferable scheme, a sliding groove is arranged on the side surface of the rotary disc facing the damping housing, the movable friction block is a centrifugal slide block which is always limited in the sliding groove, and under the action of centrifugal force, the centrifugal slide block can move outwards until the outer peripheral surface of the centrifugal slide block is in contact with the inner peripheral surface of the damping housing.

In order to make the friction effect between the centrifugal slide block and the damping housing better, at least two sliding grooves are distributed on the rotary disc at intervals along the circumferential direction, and correspondingly, at least two centrifugal slide blocks are arranged.

Preferably, the centrifugal sliders are two, an elastic piece is arranged between the centrifugal sliders, and the elastic piece enables the centrifugal sliders to have the tendency of being away from or close to each other. The elastic element can adopt a tension spring or a compression spring.

As another preferable scheme, the movable friction block is a centrifugal pendulum block which is rotatably connected to the turntable, and under the action of centrifugal force, the centrifugal pendulum block can swing until the outer peripheral surface of the centrifugal pendulum block is in contact with the inner peripheral surface of the damping housing.

Further preferably, the number of the centrifugal swinging blocks is at least two, and the centrifugal swinging blocks are distributed at intervals along the circumferential direction of the rotating disc.

Further preferably, a fixing shaft is mounted on the base, and a second strap is mounted on the fixing shaft.

Preferably, the turntable and the tape winding shaft are of a split structure or an integrated structure, and the tape winding box and the base body are of a split structure or an integrated structure.

The coil spring assembly can have various structures, and preferably comprises a coil spring and a coil spring box sleeved on the coil spring, wherein the inner hook of the coil spring is connected to the tape winding shaft, and the outer hook of the coil spring is connected to the coil spring box.

In order to enable the handle to smoothly drive the main rotating shaft, the tensioning device further comprises a transmission mechanism driven by the handle, the transmission mechanism comprises the main rotating shaft, a ratchet wheel, a driving pawl assembly and a stopping pawl assembly, the ratchet wheel is installed on the main rotating shaft, the driving pawl assembly and the stopping pawl assembly are matched with the ratchet wheel, the driving pawl assembly is installed on the handle, and the stopping pawl assembly is installed on the seat body.

As a preferable scheme, the main rotating shaft includes a first semicircular shaft and a second semicircular shaft, the main rotating shaft is mounted on the base, the ratchet wheels are mounted at two ends of the main rotating shaft, the handle is mounted on the main rotating shaft, the tape winding shaft is mounted on the tape winding box and is arranged in parallel with the main rotating shaft, two ends of the tape winding shaft extend out of the tape winding box, the coil spring assembly is mounted at a first end of the tape winding shaft, and the centrifugal damping mechanism is mounted at a second end of the tape winding shaft.

As another preferable scheme, the main rotating shaft and the tape winding shaft are coaxially arranged, the main rotating shaft axially penetrates through the tape winding shaft and can synchronously rotate with the tape winding shaft, the ratchet wheel is installed on the tape winding shaft, the handle is installed on the main rotating shaft, two ends of the main rotating shaft outwards extend out of the tape winding box, the coil spring assembly is installed at a first end of the main rotating shaft, and the centrifugal damping mechanism is installed at a second end of the main rotating shaft.

Compared with the prior art, the utility model has the advantages of: this car safety take-up device receives area slowly sets up spring assembly and centrifugal damping mechanism respectively through the both sides at the rolling tape box, in the use, the rolling tape axle is rotatory fast, produce centrifugal force and throw away the movable friction piece with the damping housing contact and produce frictional force, frictional force can drop the rotational speed of rolling tape axle, theoretically, the rotational speed is fast more, frictional force is big more, the deceleration is obvious more, under the suitable circumstances, just can obtain the speed of a relatively at the uniform velocity slower rolling meshbelt, thereby avoid receiving the area speed too fast, the couple rebounds the occurence of failure of hindering the people.

Drawings

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

fig. 2 is a schematic perspective view of a first embodiment of the present invention;

fig. 3 is a front view of a first embodiment of the present invention;

fig. 4 is a top view of a first embodiment of the present invention;

fig. 5 is a cross-sectional view of a first embodiment of the present invention;

FIG. 6 is a cross-sectional view of a tape winding mechanism in accordance with an embodiment of the present invention;

fig. 7 is a schematic perspective view of a centrifugal damping mechanism according to an embodiment of the present invention;

fig. 8 is a schematic view of the state of the centrifugal damping device when the tape is slowly wound according to the embodiment of the present invention;

fig. 9 is a schematic view of a state of the centrifugal damping device when the tape is rapidly wound according to an embodiment of the present invention;

fig. 10 is a schematic view illustrating a spring disposed between centrifugal sliders according to an embodiment of the present invention;

fig. 11 is a schematic exploded perspective view of a second embodiment of the present invention;

fig. 12 is a schematic perspective view of a second embodiment of the present invention;

fig. 13 is a front view of a second embodiment of the present invention;

fig. 14 is a top view of a second embodiment of the present invention;

fig. 15 is a sectional view of a second embodiment of the present invention;

fig. 16 is a sectional view of a winding mechanism according to a second embodiment of the present invention;

fig. 17 is a schematic perspective view of a centrifugal damping mechanism according to an embodiment of the present invention;

fig. 18 is a schematic view of a state of the centrifugal damping device in the case of winding the tape at a slow speed according to the second embodiment of the present invention;

fig. 19 is a schematic view of a state of the centrifugal damping device in the case of fast winding of the tape according to the second embodiment of the present invention;

fig. 20 is a schematic view of a pendulum block type centrifugal damping mechanism according to a third embodiment of the present invention.

Detailed Description

The present invention will be described in further detail with reference to the following embodiments.

The first embodiment is as follows:

as shown in fig. 1 to 6, the slow-speed belt-retracting automobile safety tension device of the present embodiment includes a base 1, a handle 2, a transmission mechanism, a belt-retracting mechanism, a first strap 3, and a second strap 4. The direction of arrow A in fig. 2 is taken as the forward direction, the seat body 1 is provided with the seat body outer cover 112, the rear end of the seat body 1 is provided with the fixed shaft 6, the second bandage 4 is a short belt and is arranged on the fixed shaft 6, the outer end of the second bandage 4 is provided with the second hook 41, the first bandage 3 is a long belt, and the outer end of the first bandage 3 is provided with the first hook 32.

The transmission mechanism is driven by the handle 2 and specifically comprises a main rotating shaft 5, a ratchet wheel 10, a driving pawl assembly 11 and a stopping pawl assembly 12, wherein the main rotating shaft 5 is arranged on the front side of the fixed shaft 6 and is parallel to the fixed shaft 6. The active pawl assembly 11 is installed on the handle 2, the stopping pawl assembly 12 is installed on the seat body 1, the active pawl assembly 11 and the stopping pawl assembly 12 are matched with the ratchet wheel 10, the active pawl assembly 11 comprises an active pawl and a spring, the stopping pawl assembly 12 comprises a stopping pawl and a spring, and a spring seat 16 matched with the stopping pawl assembly 12 is arranged at the rear part of the seat body 1. The specific action principle of the transmission mechanism is the same as that of the existing automobile safety tension device, and the description is not repeated.

The tape winding mechanism comprises a tape winding box 101, a coil spring assembly 7 and a tape winding shaft 8, wherein the tape winding box 101 is formed at the rear part of the base body 1, namely the tape winding box 101 and the base body 1 are an integral piece, and of course, the tape winding box 101 and the base body 1 can also adopt a split structure. The ratchet 10 is attached to the take-up shaft 8 to form a take-up reel 14, the inner end of the first binding band 3 is wound around the take-up shaft 8 to form a take-up tape 31, and the take-up reel 14 is provided in the take-up cartridge 101. The main rotating shaft 5 is coaxially arranged with the winding shaft 8 and can rotate synchronously, and the main rotating shaft 5 axially passes through the winding shaft 8 and extends outwards from the tape cassette 101. The coil spring assembly 7 is arranged outside the coil box 101 and is installed at the first end of the main rotating shaft 5, the coil spring assembly 7 comprises a coil spring 71 and a coil spring box 72 sleeved on the coil spring, wherein an inner hook of the coil spring 71 is connected to the main rotating shaft 5, an outer hook of the coil spring 71 is connected to the coil spring box 72, and the coil spring box 72 is fixed on the coil box 101 through a rivet 15. The centrifugal damping mechanism 9 is disposed outside the tape cassette 101 and is installed at the second end of the main rotating shaft 5, and the centrifugal damping mechanism 9 is used for reducing the rotating speed of the main rotating shaft 5 and the tape winding shaft 8 in the state that the retraction speed of the tape 31 is too high, so as to reduce the tape retraction speed.

The handle 2 is arranged on a main rotating shaft 5, the main rotating shaft 5 and a tape winding shaft 8 are used for winding tape and bearing the pulling force of the device, and the main rotating shaft 5 and the ratchet wheel 10 can synchronously rotate under the driving of the handle 2. When it is desired to pull or wind the tape, the driving pawl assembly 11 and the handle 2 are depressed, and the front cam of the handle 2 pushes the stopping pawl assembly 12 open, so that the driving pawl assembly 11 and the stopping pawl assembly 12 are disengaged from the ratchet 10 and are not engaged, and the winding reel 14 can be rotated synchronously with the main rotating shaft 5.

As shown in fig. 7 to 9, the centrifugal damping mechanism 9 of the present embodiment includes a turntable 91, a damping housing 92, and a movable friction block. The rotary disc 91 is fixed to the main shaft 5 by screws 17, the damping cover 92 is covered outside the rotary disc 91, and the damping cover 92 is fixed to the tape cassette 101 by rivets 15. The movable friction block is arranged on the turntable 91, the outer circumferential surface of the movable friction block and the inner circumferential surface of the damping housing 92 form a friction surface which is matched with each other, and the movable friction block can move until the outer circumferential surface of the movable friction block is contacted with the inner circumferential surface of the damping housing 92 under the action of centrifugal force. Specifically, two symmetrically arranged sliding grooves 911 are arranged on the side surface of the rotary disc 91 facing the damping housing 92, the movable friction block is a centrifugal slider 93 which is always limited in the corresponding sliding groove 911, the centrifugal slider 93 can move outwards under the action of centrifugal force until the outer peripheral surface of the centrifugal slider 93 contacts with the inner peripheral surface of the damping housing 92, the inner peripheral surface of the damping housing 2 is a circumferential surface, and correspondingly, the outer peripheral surface of the centrifugal slider 93 is an arc surface. Of course, the number of the centrifugal sliders 93 is not limited to two, and may be one, or three or more.

As shown in fig. 10, two centrifugal sliders 93 are symmetrically arranged, an elastic member 94 is disposed between the two centrifugal sliders 93, the elastic member 94 may be a tension spring, so that the two centrifugal sliders 93 tend to approach each other, or the elastic member 94 may be a compression spring, so that the two centrifugal sliders 93 tend to move away from each other.

The working principle of the automobile safety tension device is as follows:

when not in use, the first binding band 3 is wound back into the roll tape cassette 101 under the force of the coil spring 71. When the binding operation is needed, according to the requirement of the actual application occasion, the first binding band 3 needs to be pulled out by a corresponding length, as shown in fig. 8, when the main rotating shaft 5 and the band winding shaft 8 rotate slowly, the centrifugal force is small, which is not enough to throw the centrifugal slider 93 out, or even if the centrifugal slider contacts the damping housing 92 after being thrown out, too large friction is not generated, and the normal winding of the band 31 or the pulling of the band 31 is not affected (the band pulling speed is generally slow). As shown in fig. 9, when the winding speed is fast, the main rotating shaft 5 and the tape winding shaft 8 rotate fast, centrifugal force is generated to throw the centrifugal slider 93 out to contact with the damping housing 92 and generate friction force, the friction force reduces the rotating speed, theoretically, the faster the rotating speed, the larger the friction force, the more obvious the reduction speed is, different materials can be used to obtain different effects, and a relatively uniform and slow tape winding speed can be obtained under appropriate conditions, so that the accident that the hook rebounds to hurt people due to the fact that the tape winding speed is too fast is avoided.

Example two:

as shown in fig. 11 to 19, the main rotating shaft 5 of the tensioning device of the present embodiment includes a first semicircular shaft 51 and a second semicircular shaft 52, the main rotating shaft 5 is installed at the front portion of the seat body 1, the rear portion of the seat body 1 is installed with a fixing shaft, the fixing shaft is fixed by a fixing screw 61 and a fixing nut 62, the fixing screw 61 is arranged in parallel with the main rotating shaft 5, the second strap 4 is a short strap and is installed on the fixing screw 61, and the outer end of the second strap 4 is provided with a second hook 41.

The handle 2 and the ratchet wheel 10 are arranged on the main rotating shaft 5, the ratchet wheel 10 is arranged at two ends of the main rotating shaft, the outer end of the main rotating shaft 5 is fixed through a fixing pin 13, and the main rotating shaft 5 and the ratchet wheel 10 can synchronously rotate under the driving of the handle 2.

The tape coiling mechanism of this embodiment includes tape cassette 101, wind spring subassembly 7 and tape coiling axle 8, tape coiling axle 8 passes and both ends outwards stretch out in tape cassette 101 respectively from tape cassette 101, tape coiling axle 8 is on a parallel with main rotating shaft 5, first bandage 3 is the area of taking, first bandage 3 outer end has first couple 32, 3 inner ends of first bandage pass main rotating shaft 5 backward and form winding tape 31, the inner end of winding tape 31 is installed on tape coiling axle 8, at this moment, main rotating shaft 5 is used for the pulling force of load-bearing device after coiling first bandage 3, tape coiling axle 8 does not bear the pulling force, only is used for winding tape 31. The coil spring assembly 7 is mounted at a first end of the winding shaft 8, the coil spring assembly 7 comprises a coil spring 71 and a coil spring box 72 sleeved on the coil spring, wherein an inner hook of the coil spring 71 is connected to the winding shaft 8, an outer hook of the coil spring 71 is connected to the coil spring box 72, and the coil spring box 72 is fixed on the coil spring box 101 through a rivet 15. The centrifugal damping mechanism 9 is installed at the second end of the tape winding shaft 8, and the centrifugal damping mechanism 9 is used for reducing the rotation speed of the tape winding shaft 8 in a state that the retraction speed of the tape 31 is too high, so that the tape retraction speed is reduced.

The structure and operation principle of the centrifugal damping mechanism 9 of the present embodiment are the same as those of the first embodiment, and will not be described herein.

Example three:

as shown in fig. 20, the movable friction block of the present embodiment is a centrifugal pendulum block 95 rotatably connected to the turntable 91, in the present embodiment, two centrifugal pendulum blocks 95 are arranged on opposite sides, when the winding tape 31 is retracted quickly, the winding shaft 8 rotates quickly, and under the action of centrifugal force, the centrifugal pendulum block 95 can swing until the outer peripheral surface of the centrifugal pendulum block 95 contacts with the inner peripheral surface of the damping housing 92, so as to increase the friction force between the centrifugal pendulum block 95 and the damping housing 92, reduce the rotation speed of the winding shaft 8, and further reduce the winding speed. In addition, the number of the centrifugal pendulum blocks 95 is not limited to two, and may be one, three, or more than three.

Claims (10)

1. The utility model provides a take-up car safety overspeed device tensioner slowly, includes pedestal (1), handle (2), winding mechanism and first bandage (3), on pedestal (1) was located to handle (2) and winding mechanism, install on pedestal (1) by handle (2) driven main pivot (5), install on main pivot (5) and winding mechanism first bandage (3), its characterized in that: the winding mechanism comprises a winding box (101), a winding spring assembly (7) and a winding shaft (8), the inner end of the first binding band (3) is mounted on the winding shaft (8), the winding spring assembly (7) and a centrifugal damping mechanism (9) are respectively arranged on two sides of the winding box (101), and the centrifugal damping mechanism (9) is used for reducing the rotation speed of the winding shaft (8) in the state that the winding speed of the first binding band (3) is too high.

2. The slow-speed retracting automobile safety tension device as claimed in claim 1, wherein: the centrifugal damping mechanism (9) comprises a rotary disc (91), a damping housing (92) and a movable friction block, wherein the rotary disc (91) can synchronously rotate with the tape winding shaft (8), the damping housing (92) is covered outside the rotary disc (91), the movable friction block is arranged on the rotary disc (91), the peripheral surface of the movable friction block and the inner peripheral surface of the damping housing (92) form a friction surface which is matched with each other, and the movable friction block can move to the peripheral surface of the movable friction block to be contacted with the inner peripheral surface of the damping housing (92) under the action of centrifugal force.

3. The slow-speed retracting automobile safety tension device as claimed in claim 2, wherein: the side surface of the rotary disc (91) facing the damping housing (92) is provided with a sliding groove (911), the movable friction block is a centrifugal sliding block (93) which is always limited in the sliding groove (911), and under the action of centrifugal force, the centrifugal sliding block (93) can move outwards until the outer peripheral surface of the centrifugal sliding block (93) is in contact with the inner peripheral surface of the damping housing (92).

4. The slow-speed retracting automobile safety tension device as claimed in claim 3, wherein: at least two sliding grooves (911) are distributed on the rotating disc (91) at intervals along the circumferential direction, and correspondingly, at least two centrifugal sliding blocks (93) are arranged.

5. The slow-speed retracting automobile safety tension device as claimed in claim 4, wherein: the centrifugal sliding blocks (93) are two, an elastic piece (94) is arranged between the centrifugal sliding blocks (93), and the elastic piece (94) enables the two centrifugal sliding blocks (93) to have the tendency of being away from each other or approaching each other.

6. The slow-speed retracting automobile safety tension device as claimed in claim 2, wherein: the movable friction block is a centrifugal swing block (95) which is rotatably connected to the turntable (91), and under the action of centrifugal force, the centrifugal swing block (95) can swing until the outer peripheral surface of the centrifugal swing block (95) is in contact with the inner peripheral surface of the damping housing (92).

7. The slow-speed retracting automobile safety tension device as claimed in claim 1, wherein: a fixed shaft (6) is installed on the base body (1), and a second binding band (4) is installed on the fixed shaft (6).

8. The slow-retraction automotive safety tensioner as claimed in any one of claims 1 to 7, wherein: the novel seat is characterized by further comprising a transmission mechanism driven by the handle (2), wherein the transmission mechanism comprises a main rotating shaft (5), a ratchet wheel (10), an active pawl component (11) and a stop pawl component (12), the ratchet wheel (10) is installed on the main rotating shaft (5), the active pawl component (11) and the stop pawl component (12) are matched with the ratchet wheel (10), the active pawl component (11) is installed on the handle (2), and the stop pawl component (12) is installed on the seat body (1).

9. The slow-speed retracting automobile safety tension device as claimed in claim 8, wherein: the main rotating shaft (5) comprises a first semicircular shaft (51) and a second semicircular shaft (52), the main rotating shaft (5) is installed on the base body (1), the ratchet wheel (10) is installed at two ends of the main rotating shaft (5), the handle (2) is installed on the main rotating shaft (5), the tape winding shaft (8) is installed on the tape winding box (101) and is arranged in parallel with the main rotating shaft (5), two ends of the tape winding shaft (8) outwards extend out of the tape winding box (101), the coil spring assembly (7) is installed at a first end of the tape winding shaft (8), and the centrifugal damping mechanism (9) is installed at a second end of the tape winding shaft (8).

10. The slow-speed retracting automobile safety tension device as claimed in claim 8, wherein: the main rotating shaft (5) and the tape winding shaft (8) are coaxially arranged, the main rotating shaft (5) axially penetrates through the tape winding shaft (8) and can synchronously rotate with the tape winding shaft (8), the ratchet wheel (10) is installed on the tape winding shaft (8), the handle (2) is installed on the main rotating shaft (5), two ends of the main rotating shaft (5) outwards extend out of the tape winding box (101), the coil spring assembly (7) is installed at the first end of the main rotating shaft (5), and the centrifugal damping mechanism (9) is installed at the second end of the main rotating shaft (5).

Images