Inertial centrifugal force controlled safety take-up tensioner

Abstract

The application discloses an inertial centrifugal force control safe belt tightening device, relates to the technical field of tightener, and comprises a handle assembly, a base assembly and a long belt, wherein the handle assembly comprises a handle and a ratchet wheel, the base assembly comprises a base, the handle and the base are pivotally connected through a volute spring shaft, one end of the volute spring shaft is provided with a centrifugal brake assembly, and the centrifugal brake assembly comprises a brake disc, a brake cover, a brake pawl and a return compression spring. The application has the advantages of reasonable design, brake function, prevention of long belt swinging and injury of operators, personal safety of operators, handle limiting function, obvious improvement of smoothness and service life of the tightening device and excellent practicability.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of tightening device, in particular to a safety tightening device controlled by inertial centrifugal force. BACKGROUND

[0002] The tightening device is a kind of logistics binding tool, which is used for fixing goods in the logistics process to prevent displacement and shaking of goods and provide guarantee for logistics safety.

[0003] The common tightening device generally comprises a handle assembly, a base assembly, a ratchet wheel and long and short belts. When fixing goods, the long and short belts are fixed at a fixed position (the long and short belts can also be interconnected), then the handle assembly is reciprocally pulled to drive the ratchet wheel to rotate through the movable pawl on the handle assembly, so that the driving shaft connected with the ratchet wheel rotates to wind the belts until the length of the belts reaches the limit, and the fixing of the goods is completed. When the goods need to be unpacked, the handle assembly is only turned to a specified angle to make the movable pawl disengage from the ratchet wheel, the stop pawl on the base assembly is lifted by the handle side plate of the handle assembly and disengages from the ratchet wheel, at this time, the long belt can be pulled out to achieve the purpose of unpacking the goods. Some tightening devices have independent power source (generally a clock spring, at this time the driving shaft is connected with the clock spring, which is actually a clock spring shaft), and have the function of automatically winding the long belt when unpacking the goods.

[0004] When the tightening device with power source automatically winds the long belt, the winding speed needs to be carefully controlled to prevent the long belt from swinging and hurting the operator, therefore, a corresponding brake mechanism needs to be configured. SUMMARY

[0005] In view of the problems in the background art, the present application provides a safety tightening device controlled by inertial centrifugal force.

[0006] To achieve the above-mentioned purpose, the present application provides the following technical scheme:

[0007] The safety tightening device controlled by inertial centrifugal force comprises a handle assembly, a base assembly and a long belt. The handle assembly comprises a handle and a ratchet wheel. The base assembly comprises a base. The handle and the base are pivotally connected by a clock spring shaft. The ratchet wheels are fixedly installed at both ends of the clock spring shaft, and a winding drum is fixed between the ratchet wheels. The ratchet wheels, the winding drum and the clock spring shaft synchronously rotate. The winding drum is coaxially arranged outside the clock spring shaft. An opening is formed on one side of the winding drum for the long belt to pass through. One end of the long belt is sleeved on the clock spring shaft and led out from one end of the base through the opening on the winding drum. One end of the clock spring shaft is connected with a clock spring box. The other end of the clock spring shaft is provided with a centrifugal brake assembly.

[0008] The centrifugal brake assembly comprises a brake disc, a brake cover, brake claws and a return spring, the middle part of the brake disc is fixedly connected with the worm spring shaft through screws, the brake claws are circumferentially distributed on the brake disc, and one end of each brake claw is rotatably connected with the brake disc, the return spring is installed on the brake disc and elastically contacts the brake claws to provide a force for the brake claws to converge to the center of the brake disc, the brake cover is fixedly installed on the side surface of the base and contains the brake disc, the brake claws and the return spring in the brake cover, and a plurality of continuous and circumferentially distributed internal teeth are arranged on the annular inner wall of the brake cover facing the brake claws;

[0009] The base is provided with a front cover near one end of the long belt.

[0010] The front cover is provided with a belt passage for the long belt to pass through, and is provided with symmetrical limiting walls, and the bottom of the base is provided with symmetrical limiting openings in the form of strips, the limiting walls and the limiting openings cooperate to limit the handle to avoid interference between the side surface of the handle and the side surface of the base and the ratchet wheel.

[0011] The long belt is provided with a hook, the front cover is located at one end of the base, the belt passage thereof extends to the other end of the base and is in the form of a neck, and is used for clamping one end of the hook.

[0012] The hook is provided with a safety mechanism at the opening thereof, the safety mechanism comprises a return spring and a safety sleeve, the return spring is installed on the hook, and the safety sleeve is sleeved on the return spring and elastically closes the opening part of the hook under the action of the return spring.

[0013] The long belt forms a C-shaped corner at the opening of the winding drum, and a protection part is arranged on the inner side surface of the C-shaped corner, the protection part is formed by multiple layers of stitching of the end part of the long belt or is composed of one or more layers of protection pads connected with the long belt by stitching.

[0014] The base is provided with a detachable connecting shaft at the end opposite to the long belt, and one or more of a short belt, a hook, a buckle and a fixed mounting plate are connected with the connecting shaft.

[0015] The centrifugal brake assembly can be replaced by an inertial brake assembly.

[0016] The inertial brake assembly includes an inertial brake disc, an eccentric brake claw and an inertial brake cover, the inertial brake disc is fixedly connected with the volute spring shaft and rotates synchronously with the volute spring shaft, the middle part of the inertial brake disc is provided with a C-shaped brake lever with a C-shaped section, the eccentric brake claw is provided with a linkage groove and a brake groove in the hole, an inclined transition section is arranged between the linkage groove and the brake groove, the eccentric brake claw is eccentrically sleeved on the C-shaped brake lever, and brake outer teeth are arranged on the outer side of the eccentric brake claw away from the brake groove, the inertial brake cover is fixedly installed on the side surface of the base and contains the inertial brake disc and the eccentric brake claw in the inertial brake cover, and a plurality of continuous brake inner teeth distributed in the circumferential direction are arranged on the annular inner wall of the inertial brake cover facing the inertial brake disc.

[0017] Technical effects and advantages of the present application:

[0018] The application discloses an inertial centrifugal force control safety belt winding and tightening device and relates to the technical field of winders. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is an explosion schematic view of the present application.

[0020] Figure 2 It is a combination state schematic view of the present application.

[0021] Figure 3 It is an internal schematic view of the centrifugal brake assembly.

[0022] Figure 4 It is a combination state schematic view (embodiment 2-4) of the present application.

[0023] Figure 5 It is a top view (embodiment 2-4) of the present application.

[0024] Figure 6 It is Figure 5 A-A direction section view.

[0025] Figure 7 It is Figure 5 B-B direction section view.

[0026] Figure 8 It is Figure 5 C-C direction section view.

[0027] Figure 9 is a front cover schematic view.

[0028] Figure 10 is an inertial brake assembly exploded view.

[0029] Figure 11 is an inertial brake assembly internal schematic view (unwinding state).

[0030] Figure 12 is an inertial brake assembly internal schematic view (winding state).

[0031] Figure 13 is an inertial brake assembly internal schematic view (locking state).

[0032] BRIEF DESCRIPTION OF DRAWINGS 1, handle assembly; 2, base assembly; 3, long woven belt; 4, handle; 5, ratchet wheel; 6, base; 7, volute spring shaft; 8, winding drum; 9, volute spring box; 10, brake disc; 11, brake cover; 12, brake pawl; 13, return compression spring; 14, inner teeth; 15, front cover; 16, woven belt passage; 17, limiting wall; 18, limiting port; 19, hook; 20, centrifugal brake assembly; 21, safety mechanism; 22, return spring; 23, safety cover; 24, C-shaped corner; 25, protection part; 26, connecting shaft; 27, inertial brake assembly; 28, inertial brake disc; 29, eccentric brake pawl; 30, inertial brake cover; 31, C-shaped brake lever; 32, linkage groove; 33, brake groove; 34, brake outer teeth; 35, brake inner teeth; 36, movable ratchet pawl; 37, stop ratchet pawl; 38, excess section. DETAILED DESCRIPTION

[0033] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0034] Embodiment 1

[0035] As shown in the figure, the embodiment discloses an inertial centrifugal force control safety belt winding and tightening device, which comprises a handle assembly 1, a base assembly 2 and a long belt 3, the handle assembly 1 comprises a handle 4 and a ratchet wheel 5, the base assembly 2 comprises a base 6, the handle 4 and the base 6 are pivotally connected through a volute spring shaft 7, the ratchet wheel 5 is fixedly installed at both ends of the volute spring shaft 7, a winding drum 8 is fixed between the ratchet wheels 5, the ratchet wheel 5, the winding drum 8 and the volute spring shaft 7 rotate synchronously, the winding drum 8 is coaxially arranged on the volute spring shaft 7, an opening is formed on one side of the winding drum 8 for the long belt 3 to pass through, one end of the long belt 3 is sleeved on the volute spring shaft 7 and is led out from one end of the base 6 through the opening on the winding drum 8, one end of the volute spring shaft 7 is connected with a volute spring box 9, in addition, the handle assembly 1 further comprises a movable pawl 36, and the base assembly 2 further comprises a stop pawl 37; when fixing goods, first, the end of the belt is fixed, then the handle assembly 1 is rotated to a specified angle, the movable pawl 36 and the stop pawl 37 are both disengaged from the ratchet wheel 5, at this time, the volute spring box 9 works to drive the volute spring shaft 7 and the winding drum 8 to rotate together, the belt is wound, until the goods are preliminarily fixed by the tightening device, then the handle assembly 1 is repeatedly pulled, the movable pawl 36 on the handle assembly 1 drives the ratchet wheel 5 to rotate, and then drives the volute spring shaft 7 and the winding drum 8 to rotate together, the belt is wound, until the goods are fixed; when the goods need to be released, the handle assembly 1 is rotated to a specified angle (the description of the empty load section, the tightening section and the release section can be referred to in the safety control belt winding fastener disclosed in application No. CN201922259689.0), the movable pawl 36 is disengaged from the ratchet wheel 5, and the stop pawl 3 is pulled, at this time, the long belt is appropriately pulled out to facilitate the release of the fixing of the two ends of the belt, after the tightening device is released, the movable pawl 36 and the stop pawl 37 are both disengaged from the ratchet wheel 5, and the volute spring box 9 works again to wind the belt in place;

[0036] In order to avoid that the long belt swings and injures the operator, in the embodiment, the other end of the volute spring shaft 7 is provided with a centrifugal brake assembly;

[0037] The centrifugal brake assembly 20 comprises a brake disc 10, a brake cover 11, brake claws 12 and a reset compression spring 13. The middle part of the brake disc 10 is fixedly connected with the volute spring shaft 7 by screws and rotates synchronously and coaxially with the volute spring shaft 7. The brake claws 12 are multiple in number, three in the embodiment. The three brake claws 12 are distributed in the circumferential direction on the brake disc 10 and rotatably connected with the brake disc 10 at one end. The reset compression spring 13 is installed on the brake disc 10 and elastically contacts the brake claws 12 to provide a force for the brake claws 12 to converge to the center of the brake disc 10. In the static state, the brake claws 12 converge to the center of the brake disc 10. The brake cover 11 is fixedly installed on the side surface of the base 6 and contains the brake disc 10, the brake claws 12 and the reset compression spring 13 in the brake cover 11. A plurality of continuous inner teeth 14 are arranged on the annular inner wall of the brake cover 11 facing the brake claws 12 in a circumferential distribution. When the weaving belt is automatically wound by the volute spring box 9, the brake disc 10 rotates with the volute spring shaft 7. The brake claws 12 overcome the elastic force of the reset compression spring 13 and move close to the inner teeth 14 of the brake cover 11 under the centrifugal force. If the winding speed is too fast, the end of the brake claw 12 will contact and be locked with the inner teeth 14, the volute spring shaft 7 will be locked, and the weaving belt winding will be stopped. When the weaving belt needs to be wound again, a small section of the long weaving belt is pulled out to make the brake claw 12 disengage from the inner teeth 14. At this time, the centrifugal brake assembly 20 returns to the unlocked state, and the automatic winding of the weaving belt can continue until the weaving belt is wound in place. In this process, the weaving belt winding speed is indirectly controlled, effectively ensuring the personal safety of the operator.

[0038] Embodiment 2

[0039] The embodiment discloses an inertial centrifugal force control safety belt winding and tensioning device, wherein the base 6 is provided with a front cover 15 close to one end of the long weaving belt 3.

[0040] The front cover 15 is provided with a weaving belt passage 16 for the long weaving belt 3 to pass through and symmetrical limiting walls 17. The bottom of the base 6 is provided with symmetrical limiting openings 18 in the shape of strips. The limiting walls 17 and the limiting openings 18 cooperate to limit the handle 4. When the handle assembly 1 rotates, the side plate of the handle 4 will move under the limiting action of the limiting walls 17 and the limiting openings 18, which can effectively avoid the interference between the side surface of the handle 4 and the side surface of the ratchet wheel 5 and the base 6. Firstly, it can improve the smoothness of the use of the tensioning device and make the use more labor-saving. Secondly, it can reduce the deformation of the handle 4 caused by use, reduce friction and increase the service life of the tensioning device.

[0041] In addition, in the embodiment, the long woven tape 3 is connected with a hook 19, the front cover 15 is located at one end of the base 6, the woven tape channel 16 on the front cover 15 extends to the other end of the base 6, and is in the shape of a notch, so that the woven tape channel 16 has a certain depth. When the long woven tape 3 is completely wound, one end of the hook 19 on the long woven tape 3 can be clamped into the woven tape channel 16, so as to fix the hook 19 and prevent the hook 19 from shaking and reducing the security risk.

[0042] Embodiment 3

[0043] The embodiment discloses an inertial centrifugal force control safety tape winding and tightening device, wherein the opening of the hook 19 is provided with a safety mechanism 21 for preventing the hook 19 from being accidentally separated in the fixed state and increasing the safety in use. Specifically, the safety mechanism 21 comprises a return spring 22 and a safety sleeve 23. The return spring 22 is installed on the hook 19 and has an elastic force of approaching the opening of the hook 19. The safety sleeve 23 is sleeved on the return spring 22. At this time, the safety sleeve 23 elastically closes the opening of the hook 19 under the action of the return spring 22.

[0044] Embodiment 4

[0045] The embodiment discloses an inertial centrifugal force control safety tape winding and tightening device, wherein, with the winding of the long woven tape 3, the long woven tape 3 is wound around the winding drum 8. At this time, the end of the long woven tape 3 forms a C-shaped corner 24 in the region of the opening of the winding drum 8. With the tightening of the tightening device, the inner side of the C-shaped corner 24 and the region of the opening of the winding drum 8 generate a large pressure and friction. In order to ensure the service life of the long woven tape 3, a protection part 25 is arranged at the above-mentioned region. The protection part 25 is formed by the end of the long woven tape 3 being stitched by multiple layers, or the protection part 25 is formed by one or more layers of protection pads which are stitched and connected with the long woven tape 3.

[0046] In addition, the base 6 of the embodiment is provided with a detachable connecting shaft 26 at the end opposite to the long woven tape 3. The connecting shaft 26 is connected with one or more of a short woven tape, a hook, a buckle and a fixed mounting plate, and also includes other fasteners and the like which have a fixing function.

[0047] Embodiment 5

[0048] The embodiment discloses an inertial centrifugal force control safety tape winding and tightening device, wherein the centrifugal brake assembly 20 can be replaced by an inertial brake assembly 27.

[0049] The inertial brake assembly 27 comprises an inertial brake disc 28, an eccentric brake claw 29 and an inertial brake cover 30, the inertial brake disc 28 is fixedly connected with the volute spring shaft 7 and rotates synchronously with the volute spring shaft 7, the middle part of the inertial brake disc 28 is provided with a C-shaped brake lever 31 with a C-shaped section, the eccentric brake claw 29 is provided with a linkage groove 32 and a brake groove 33 in the hole, the eccentric brake claw 29 is eccentrically sleeved on the C-shaped brake lever 31, the outer side of the eccentric brake claw 29 away from the brake groove 33 is provided with brake outer teeth 34, the inertial brake cover 30 is fixedly installed on the side of the base 6 and contains the inertial brake disc 28 and the eccentric brake claw 29 in the inertial brake cover 30, a plurality of continuous brake inner teeth 35 distributed in the circumferential direction are arranged on the ring-shaped inner wall of the inertial brake cover 30 facing the inertial brake disc 28, and a slanting transition section 38 is arranged between the linkage groove 32 and the brake groove 33; when the belt is normally unwound, the inertial brake disc 28 connected with the volute spring shaft 7 drives the C-shaped brake lever 31 to rotate, at this time, the C-shaped opening of the C-shaped brake lever 31 is clamped in the linkage groove 32, the brake outer teeth 34 are not in contact with the brake inner teeth 35, and the belt can be continuously unwound; when the belt is wound, the C-shaped opening of the C-shaped brake lever 31 continuously abuts against the transition section 38 and makes the brake outer teeth 34 on the eccentric brake claw 29 away from the brake inner teeth 35, so that the belt can be continuously wound, but when the winding speed is too fast, the eccentric brake claw 29 makes the C-shaped opening of the C-shaped brake lever 31 clamped in the brake groove 33 under the impact rebound and inertial effect, at this time, the brake outer teeth 34 are in mesh with the brake inner teeth 35, the inertial brake assembly 27 is in the brake state, and the belt winding is locked; until the belt is pulled out for a period of time, the brake outer teeth 34 are in contact and mesh with the brake inner teeth 35, and the belt can be wound again.

[0050] In the description of the present application, unless otherwise explicitly specified and limited, the terms "arrangement", "installation", "connection", "link", "fixation" should be understood broadly, for example, can be fixed connection, can also be detachable connection, or integrated; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through an intermediate medium, can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0051] The standard parts used in the present application can be purchased from the market, and the special-shaped parts can be ordered according to the description and the drawings.

[0052] Although the embodiments of the present application have been shown and described, those skilled in the art can understand that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and spirits of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A safety belt tensioner controlled by inertial centrifugal force, comprising a handle assembly (1), a base assembly (2) and a long belt (3), the handle assembly (1) comprising a handle (4) and a ratchet wheel (5), the base assembly (2) comprising a base (6), the handle (4) and the base (6) being pivotally connected by a volute spring shaft (7), the ratchet wheels (5) being fixedly installed at both ends of the volute spring shaft (7), and a winding drum (8) being fixed between the ratchet wheels (5), the ratchet wheels (5), the winding drum (8) and the volute spring shaft (7) rotating synchronously, the winding drum (8) being coaxially arranged outside the volute spring shaft (7), and an opening being formed on one side of the winding drum (8) for the long belt (3) to pass through, one end of the long belt (3) being sleeved on the volute spring shaft (7) and led out from one end of the base (6) through the opening on the winding drum (8), one end of the volute spring shaft (7) being connected with a volute spring box (9), characterized in that, The other end of the coil spring shaft (7) is provided with an inertia brake assembly (27); The inertia brake assembly (27) comprises an inertia brake disc (28), an eccentric brake claw (29) and an inertia brake cover (30), the inertia brake disc (28) is fixedly connected with the coil spring shaft (7) and rotates synchronously with the coil spring shaft (7), the middle part of the inertia brake disc (28) is provided with a C-shaped brake lever (31) with a C-shaped cross section, the eccentric brake claw (29) is provided with a linkage groove (32) and a brake groove (33) in the center hole, an inclined transition section (38) is arranged between the linkage groove (32) and the brake groove (33), the eccentric brake claw (29) is eccentrically sleeved on the C-shaped brake lever (31), the outer side of the eccentric brake claw (29) away from the brake groove (33) is provided with brake outer teeth (34), the inertia brake cover (30) is fixedly installed on the side surface of the base (6) and contains the inertia brake disc (28) and the eccentric brake claw (29) in the inertia brake cover (30), a plurality of continuous brake inner teeth (35) are arranged on the annular inner wall of the inertia brake cover (30) facing the inertia brake disc (28) in a circumferential direction.

2. A safety take-up device according to claim 1, wherein the centrifugal force control member is a centrifugal force control plate. The base (6) is provided with a front cover (15) near one end of the long woven belt (3); The front cover (15) is provided with a woven belt passage (16) for the long woven belt (3) to pass through and symmetrical limiting walls (17), the bottom of the base (6) is provided with symmetrical limiting openings (18) in a strip shape, and the limiting walls (17) and the limiting openings (18) cooperate to limit the hand handle (4) to avoid interference between the side surface of the hand handle (4) and the ratchet (5).

3. A safety take-up device according to claim 2, wherein the centrifugal force control member is a centrifugal force control disc. The long woven belt (3) is connected with a hook (19), the front cover (15) is located at one end of the base (6), the woven belt passage (16) thereof extends to the other end of the base (6) and is in a necked shape for clamping one end of the hook (19).

4. A safety take-up device according to claim 3, wherein the cam is formed with a plurality of cam surfaces each having a different radius of curvature. The opening of the hook (19) is provided with a safety mechanism (21), the safety mechanism (21) comprises a return spring (22) and a safety sleeve (23), the return spring (22) is installed on the hook (19), and the safety sleeve (23) is sleeved on the return spring (22) and elastically closes the opening part of the hook (19) under the action of the return spring (22).

5. A safety take-up device according to claim 1, wherein: The long woven belt (3) forms a C-shaped corner (24) at the opening area of the winding drum (8), the inner side of the C-shaped corner (24) is provided with a protection part (25) which is formed by multiple layers of the end part of the long woven belt (3) being sewn or is composed of one or more layers of protection pads which are sewn and connected with the long woven belt (3).

6. A safety take-up device according to claim 1, wherein: The base (6) is provided with a detachable connecting shaft (26) at the end opposite to the long woven belt (3), and one or more of a short woven belt, a hook, a buckle and a fixed mounting plate are connected with the connecting shaft (26).

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