Adjustable centrifugal deceleration measuring tape
By setting a speed reduction ring and slider in the tape measure and combining the adjustment mechanism, the adjustability of the tape measure recycling speed is achieved, solving the problem of irreconcilable recycling speed and insufficient safety of the existing tape measure recycling speed, and improving safety and adaptability.
Patent Information
- Application Number
- CN202422655206.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-31
- Publication Date
- 2025-08-26
- Estimated Expiration
- 2034-10-31
AI Technical Summary
The existing tape measure is unadjustable when recycled by the ruler, which can easily cut people's hands and cannot adapt to the needs of different working conditions.
An adjustable centrifugal speed reduction tape measure is designed. By setting the speed reduction ring and the slider, the position of the slider is adjusted by centrifugal action, and the maximum sliding distance between the slider and the speed reduction ring is adjusted in combination with the adjustment mechanism to achieve switching of different recycling speeds.
The recycling speed of the ruler belt is reduced, the hand is cut, the safety performance is improved, and the requirements of different working conditions are adapted to the gear switching of different recycling speeds is realized.
Smart Images
Figure CN223271776U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of measuring tools, in particular to an adjustable centrifugal deceleration tape measure. Background Art
[0002] Tape measures are common measuring tools in everyday life. To use a tape measure, the tape is pulled out and secured to measure. To retract the tape, a spring inside the tape retracts the tape back into the tape housing.
[0003] The inventors have found that the existing tape measure will become faster and faster when the tape is retracted, which can easily cut people's hands and pose a safety hazard. In addition, the tape retraction speed cannot be adjusted and cannot adapt to different working conditions. Utility Model Content
[0004] The purpose of the utility model includes providing an adjustable centrifugal deceleration tape measure, which can reduce the tape recovery speed during the recovery process, avoid the tape measure cutting people's hands during recovery, improve safety performance, and can also adjust the tape measure recovery speed to meet the needs of different working conditions.
[0005] The embodiment of the present utility model can be implemented as follows:
[0006] The utility model provides an adjustable centrifugal deceleration tape measure, comprising:
[0007] a housing, wherein a rotating shaft is disposed in the housing;
[0008] A hub assembly, the hub assembly being located in the housing, the hub assembly being sleeved on the rotating shaft, and being capable of rotating around the rotating shaft;
[0009] a reduction mechanism, the reduction mechanism comprising a reduction ring and a slider, the reduction ring being fixedly disposed in the housing, the slider being slidably connected to the hub assembly, and the slider being capable of approaching or moving away from the reduction ring;
[0010] An adjusting mechanism is used to adjust a maximum sliding distance of the slider toward the reduction ring.
[0011] In an optional embodiment, the slider includes a slider, a slide groove is provided on the hub assembly, the slider slides in cooperation with the slide groove, a reset member is provided between the slider and the hub assembly, and the reset member is used to move the slider away from the reduction ring.
[0012] In an optional embodiment, deceleration bumps are arranged at intervals on the inner wall of the deceleration ring, a first deceleration slope is provided on the deceleration bump, a second deceleration slope is provided on one end of the slider close to the deceleration ring, and the first deceleration slope is inclined relative to the tangential direction of the deceleration ring. When the wheel hub assembly rotates about a first direction and the slider approaches and abuts the deceleration ring, the first deceleration slope and the second deceleration slope fit together.
[0013] In an optional embodiment, a first guide bevel is further provided on the deceleration bump, and a second guide bevel is further provided on the end of the slider close to the deceleration ring. The first guide bevel is inclined relative to the tangent direction of the deceleration ring and is opposite to the inclination direction of the first deceleration bevel. When the wheel hub assembly rotates in the second direction and the slider approaches and abuts the deceleration ring, the first guide bevel is in contact with the second guide bevel.
[0014] In an optional embodiment, a first transition surface is further provided on the deceleration bump, and the first transition surface is located between the first deceleration inclined surface and the first guide inclined surface. A second transition surface is also provided at one end of the slider close to the deceleration ring, and the second transition surface is located between the second deceleration inclined surface and the second guide inclined surface.
[0015] In an optional embodiment, the adjustment mechanism includes a retaining ring and a drive assembly, a first adjustment surface is provided on the retaining ring, a retaining groove is provided on one side of the slider, a second adjustment surface is provided in the retaining groove, and the drive assembly is used to drive the retaining ring closer to or away from the slider so that the retaining ring enters the retaining groove, and the first adjustment surface cooperates with the second adjustment surface to adjust the maximum sliding distance of the slider toward the deceleration ring.
[0016] In an optional embodiment, the drive assembly includes an adjusting knob, one side of the adjusting knob is fixedly connected to the retaining ring, a first wedge block is provided on the side of the adjusting knob facing the retaining ring, and a second wedge block is provided on the side of the retaining ring facing the adjusting knob, an opening is provided on the shell, the adjusting knob is rotatably installed on the outside of the shell, and the retaining ring is located on the inside of the shell so that the first wedge block or the second wedge block cooperates with the opening to adjust the distance between the retaining ring and the slider, and the adjusting mechanism also includes an elastic member, both ends of the elastic member are respectively connected to the shell and the adjusting knob, and the elastic member is used to tighten the adjusting knob toward the slider.
[0017] In an optional embodiment, the first wedge block and the second wedge block are both arc-shaped, and the first wedge block and the second wedge block are arranged around the rotation center of the adjustment knob.
[0018] In an optional embodiment, the first adjustment surface includes a plurality of stepped surfaces. When the retaining ring moves toward or away from the slider, the second adjustment surface abuts against different stepped surfaces to adjust the maximum sliding distance of the slider toward the reduction ring.
[0019] In an optional embodiment, lubricating liquid is provided between the retaining ring and the slider.
[0020] The beneficial effects of the adjustable centrifugal deceleration tape provided by the embodiment of the utility model include:
[0021] The adjustable centrifugal reduction tape measure of the present invention includes a housing, a hub assembly, a reduction mechanism, and an adjustment mechanism. A rotating shaft is disposed within the housing. The hub assembly is located within the housing and is used to mount the tape measure. The hub assembly is sleeved onto the rotating shaft and is capable of rotating about the rotating shaft. The reduction mechanism includes a reduction ring and a slider. The reduction ring is fixedly disposed within the housing. The slider is slidably connected to the hub assembly and can move closer to or further away from the reduction ring. The adjustment mechanism is used to adjust the maximum sliding distance of the slider toward the reduction ring.
[0022] The utility model is provided with a reduction ring and a slider. When the hub assembly rotates at high speed, the slider slides relative to the hub assembly under the action of centrifugation and gradually approaches the reduction ring. When the slider collides with the reduction ring, the reaction force exerted on the slider can decelerate the hub assembly, thereby reducing the tape recovery speed. In addition, the adjustment mechanism can adjust the maximum sliding distance of the slider toward the reduction ring, thereby adjusting the distance between the slider and the reduction ring when the slider slides to the outermost side. When the slider is not in contact with the reduction ring at all times, the tape recovery is high-speed recovery. When the slider is in contact with the reduction ring, the tape recovery is low-speed recovery. The utility model can reduce the tape recovery speed, avoid cutting people's hands, improve safety performance, and can adjust the tape recovery speed to achieve different recovery speed gear switching to meet the needs of different working conditions. BRIEF DESCRIPTION OF THE DRAWINGS
[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.
[0024] Figure 1 A schematic diagram of the exploded structure of the adjustable centrifugal deceleration tape provided in this embodiment;
[0025] Figure 2 A schematic cross-sectional view of the adjustable centrifugal deceleration tape provided in this embodiment;
[0026] Figure 3 for Figure 2 Enlarged view of part A in the middle;
[0027] Figure 4 A schematic diagram of the structural principle of the deceleration ring and slider provided in this embodiment;
[0028] Figure 5 A schematic structural diagram of the base provided in this embodiment;
[0029] Figure 6 This is a schematic structural diagram of the adjustment knob and retaining ring provided in this embodiment.
[0030] Icons: 100 - adjustable centrifugal deceleration tape; 10 - housing; 11 - base; 111 - rotating shaft; 112 - opening; 12 - upper cover; 13 - locking mechanism; 20 - hub assembly; 21 - hub; 22 - bushing; 23 - slideway; 24 - guide column; 30 - deceleration mechanism; 31 - deceleration ring; 311 - deceleration bump; 3111 - first deceleration ramp; 3112 - first guide ramp; 3113 - first transition surface; 32-slider; 321-guide hole; 322-reset member; 323-second deceleration slope; 324-second guide slope; 325-second transition surface; 326-slot; 3261-second adjustment surface; 40-adjustment mechanism; 41-snap ring; 411-second wedge block; 412-first adjustment surface; 4121-step surface; 42-drive assembly; 421-adjustment knob; 4211-first wedge block; 43-spiral groove. DETAILED DESCRIPTION
[0031] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.
[0032] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort are intended to fall within the scope of protection of the present invention.
[0033] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.
[0034] In the description of the present invention, it should be noted that if the terms "upper", "lower", "inside", "outside", etc. appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the accompanying drawings, or is the orientation or position relationship in which the utility model product is usually placed when in use. It is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present invention.
[0035] In addition, the terms "first", "second", etc., if used, are merely used to distinguish and describe, and should not be understood as indicating or implying relative importance.
[0036] It should be noted that, in the absence of conflict, the features in the embodiments of the present invention can be combined with each other.
[0037] Please refer to Figure 1 、 Figure 2 and Figure 3 The utility model provides an adjustable centrifugal deceleration tape measure 100, which includes a housing 10, a hub assembly 20, a deceleration mechanism 30 and an adjustment mechanism 40.
[0038] A rotating shaft 111 is disposed in the housing 10. The housing 10 is used to accommodate the hub assembly 20 and the reduction mechanism 30. The housing 10 includes an upper cover 12 and a base 11. The rotating shaft 111 is fixedly disposed on the base 11.
[0039] The hub assembly 20 is located within the housing 10. The hub assembly 20 is sleeved onto the rotating shaft 111 and is rotatable about the rotating shaft 111. It will be appreciated that the hub assembly 20 is used to mount a tape ruler, which is wound around the hub assembly 20. When the tape ruler is pulled out, it drives the hub assembly 20 to rotate. To retract the tape ruler, the hub assembly 20 is driven by a coil spring. This coil spring rotates the hub assembly 20, retrieving the tape ruler. The housing 10 is also provided with a locking mechanism 13 for securing the tape ruler.
[0040] Specifically, the hub assembly 20 includes a hub 21 and a sleeve 22. The sleeve 22 is sleeved on the rotating shaft 111 and can rotate around the rotating shaft 111. The sleeve 22 and the hub 21 are fixedly connected. The hub 21 is used to install a tape ruler.
[0041] The reduction mechanism 30 includes a reduction ring 31 and a slider 32. The reduction ring 31 is fixedly arranged in the housing 10. The slider 32 is slidably connected to the hub assembly 20. The slider 32 can approach or move away from the reduction ring 31. Specifically, the slider 32 is slidably connected to the hub 21. It can be understood that the reduction ring 31 is arranged on one side of the hub 21, and the center line of the reduction ring 31 coincides with the rotation center line of the hub 21. The slider 32 is installed on the side of the hub 21 close to the reduction ring 31 and is located inside the reduction ring 31. When the hub 21 rotates, the slider 32 moves toward the outside of the hub 21 under the action of centrifugation, thereby approaching the reduction ring 31. When the slider 32 contacts the reduction ring 31, the reaction force of the reduction ring 31 on the slider 32 can reduce the rotation speed of the hub 21, thereby reducing the recovery speed of the tape.
[0042] Furthermore, a slide groove 23 is provided on the wheel hub assembly 20. Specifically, the slide groove 23 is provided on the wheel hub 21. The slider 32 slides in cooperation with the slide groove 23. A reset member 322 is provided between the slider 32 and the wheel hub assembly 20. The reset member 322 is used to reset the slider 32 after it moves away from the reduction ring 31. It can be understood that when the rotation speed of the wheel hub assembly 20 is low, or when the tape is recovered, the reset member 322 is used to reset the slider 32 after it moves away from the reduction ring 31. When the rotation speed of the wheel hub assembly 20 is high, the force of the reset member 322 on the slider 32 is not sufficient to overcome the centrifugal effect of the slider 32, and the slider 32 gradually moves closer to the reduction ring 31.
[0043] Optionally, in this embodiment, the chute 23 is arranged in a direction perpendicular to the rotation axis 111, that is, in the radial direction of the hub 21, so that the slider 32 can move radially along the hub 21. In other embodiments, the chute 23 can be arranged at an angle to the direction perpendicular to the rotation axis 111. This is not limited to any particular arrangement, as long as the slider 32 can approach or move away from the reduction ring 31 and abut against the reduction ring 31.
[0044] Furthermore, to prevent the slider 32 from falling out of the chute 23, a guide hole 321 is provided in the slider 32. A guide post 24 is provided in the chute 23 to engage with the guide hole 321. Specifically, the guide post 24 and the guide hole 321 extend in the same direction as the chute 23. In this embodiment, the guide post 24 and the guide hole 321 extend perpendicular to the direction of the rotating shaft 111, ensuring that the slider 32 does not fall out of the chute 23 and preventing misalignment between the slider 32 and the reduction ring 31.
[0045] Specifically, in this embodiment, the reset member 322 is a spring. The spring is sleeved on the guide post 24 and located in the guide hole 321. One end of the spring abuts against the bottom surface of the guide hole 321, and the other end of the spring abuts against the guide post 24.
[0046] Please refer to Figure 4Specifically, deceleration protrusions 311 are provided at intervals on the inner wall of the deceleration ring 31. A first deceleration slope 3111 is provided on the deceleration protrusion 311. A second deceleration slope 323 is provided on the end of the slider 32 close to the deceleration ring 31. The first deceleration slope 3111 is inclined tangentially relative to the deceleration ring 31. When the hub assembly 20 rotates in the first direction and the slider 32 approaches and abuts the deceleration ring 31, the first deceleration slope 3111 and the second deceleration slope 323 are in contact with each other. The above-mentioned first direction is the rotation direction of the hub assembly 20 when the tape is recovered. It can be understood that when the hub assembly 20 rotates in the first direction, the rotation speed of the hub 21 becomes faster and faster under the action of the coil spring, so that the centrifugal force on the slider 32 overcomes the pulling force of the reset member 322, and the slider 32 gradually moves closer to the deceleration ring 31. When the slider 32 collides with the deceleration protrusion 311, the first deceleration slope 3111 and the second deceleration slope 323 are in contact with each other. The slider 32 continues to rotate under the action of the wheel hub 21 , causing friction between the first deceleration slope 3111 and the second deceleration slope 323 .
[0047] like Figure 4 As shown, the friction force on the slider 32 is f. The pressure exerted on the slider 32 by the deceleration bump 311 is N. The resultant force of the tangential component of the force f and N along the slider 32's rotational direction is F1. The resultant force of the force f and N along the slider 32's sliding direction is F1. Force F1 decelerates the slider 32, thereby decelerating the wheel hub 21 and reducing the tape retraction speed. Force F2 causes the slider 32 to move inward along the sliding direction, misaligning the slider 32 with the deceleration bump 311 and preventing the slider 32 from becoming stuck.
[0048] Furthermore, the deceleration projection 311 is provided with a first guide bevel 3112. A second guide bevel 324 is also provided on the end of the slider 32 proximate to the deceleration ring 31. The first guide bevel 3112 is inclined tangentially to the deceleration ring 31 and in the opposite direction of the inclination of the first deceleration bevel 3111. It will be appreciated that the deceleration projection 311 is a wedge-shaped projection. When the hub assembly 20 rotates in the second direction and the slider 32 approaches and abuts the deceleration ring 31, the first guide bevel 3112 and the second guide bevel 324 mate. Specifically, the second direction is the rotational direction of the hub assembly 20 when the tape is being withdrawn. It will be appreciated that when the tape is being withdrawn rapidly, the rotational speed of the hub 21 is sufficiently high that the centrifugal force of the slider 32 overcomes the pulling force of the return member 322, causing the slider 32 to gradually move closer to the deceleration ring 31. When the slider 32 collides with the deceleration projection 311, the first guide bevel 3112 and the second guide bevel 324 mate. The slider 32 continues to rotate under the action of the wheel hub 21, causing friction between the first guide bevel 3112 and the second guide bevel 324, thereby reducing the speed at which the tape is pulled out.
[0049] In this embodiment, the cooperation manner of the first guide slope 3112 and the second guide slope 324 is the same as the cooperation manner of the above-mentioned first deceleration slope 3111 and the second deceleration slope 323. For details, please refer to the above-mentioned force analysis of the first deceleration slope 3111 and the second deceleration slope 323, which will not be repeated here.
[0050] Furthermore, a first transition surface 3113 is provided on the deceleration protrusion 311. The first transition surface 3113 is located between the first deceleration bevel 3111 and the first guide bevel 3112. A second transition surface 325 is also provided on the end of the slider 32 close to the deceleration ring 31. The second transition surface 325 is located between the second deceleration bevel 323 and the second guide bevel 324. It can be understood that the provision of the first transition surface 3113 avoids the formation of a sharp angle between the first deceleration bevel 3111 and the first guide bevel 3112, and the second transition surface 325 avoids the formation of a sharp angle between the second deceleration bevel 323 and the second guide bevel 324, thereby avoiding the sharp point of the slider 32 from being subjected to force and causing uneven force.
[0051] Specifically, in this embodiment, the first transition surface 3113 and the second transition surface 325 are both arc surfaces. In other embodiments, the first transition surface 3113 and the second transition surface 325 can also be chamfered, and rounded corners can be set at the edges.
[0052] Please refer to Figure 2 、 Figure 3 、 Figure 5 and Figure 6 . The adjustment mechanism 40 is used to adjust the maximum sliding distance of the slider 32 toward the reduction ring 31. It can be understood that the sliding distance of the slider 32 on the wheel hub 21 is from the position closest to the rotation center of the wheel hub 21 to the position closest to the reduction ring 31. When the slider 32 moves to the position closest to the reduction ring 31, the distance between the slider 32 and the reduction ring 31 can be adjusted by the adjustment mechanism 40. Furthermore, when the slider 32 is always out of contact with the reduction ring 31, the tape retraction is high-speed retraction. When the slider 32 is in contact with the reduction ring 31 under the action of the rotation of the wheel hub 21, the tape retraction is low-speed retraction. The adjustment mechanism 40 can adjust the recovery speed of the tape, realize the switching of different recovery speed gears, and adapt to the needs of different working conditions.
[0053] Specifically, the adjustment mechanism 40 includes a retaining ring 41 and a drive assembly 42. A first adjustment surface 412 is provided on the retaining ring 41. A slot 326 is provided on one side of the slider 32. A second adjustment surface 3261 is provided in the slot 326. The drive assembly 42 is used to drive the retaining ring 41 to move closer to or away from the slider 32 so that the retaining ring 41 enters the slot 326. The first adjustment surface 412 cooperates with the second adjustment surface 3261 to adjust the maximum sliding distance of the slider 32 toward the reduction ring 31. It can be understood that when the retaining ring 41 enters the slot 326, the first adjustment surface 412 and the second adjustment surface 3261 abut against each other, thereby preventing the slider 32 from making further centrifugal movement, that is, preventing the slider 32 from approaching the reduction ring 31.
[0054] The driving assembly 42 includes an adjusting knob 421. One side of the adjusting knob 421 is fixedly connected to the retaining ring 41. A first wedge block is provided on the side of the adjusting knob 421 facing the retaining ring 41. A second wedge block 411 is provided on the side of the retaining ring 41 facing the adjusting knob 421. An opening 112 is provided on the housing 10. The adjusting knob 421 is rotatably mounted on the outside of the housing 10. The retaining ring 41 is located on the inner side of the housing 10 so that the first wedge block 4211 or the second wedge block 411 cooperates with the opening 112 to adjust the distance between the retaining ring 41 and the slider. The adjusting mechanism also includes an elastic member. The two ends of the elastic member are respectively connected to the housing and the adjusting knob 421. The elastic member is used to tighten the adjusting knob 421 toward the slider 32 assembly.
[0055] Specifically, the first wedge block 4211 and the second wedge block 411 are staggered. Both are arc-shaped and arranged around the rotation center of the adjustment knob 421, forming a spiral groove 43 between the adjustment knob 421 and the retaining ring 41. Accordingly, the opening 112 is a circular groove. The spiral groove 43 and the opening 112 cooperate with each other, so that when the adjustment knob 421 is rotated, the retaining ring 41 rotates accordingly. The spiral groove 43 converts the circular motion into linear motion, causing the retaining ring 41 to move up and down, moving closer to or away from the slider 32.
[0056] To enable adjustment of multiple speed gears, the first adjustment surface 412 includes multiple stepped surfaces 4121. When the retaining ring 41 moves toward or away from the slider 32 assembly, the second adjustment surface 3261 abuts against different stepped surfaces 4121 to adjust the maximum sliding distance of the slider 32 assembly toward the reduction ring 31.
[0057] It is understood that in this embodiment, the first adjustment surface 412 includes two stepped surfaces 4121, and the diameter of the stepped surface 4121 close to the slider 32 is larger than the diameter of the stepped surface 4121 away from the slider 32. The tape retraction speed is divided into three gears: high speed, medium speed, and low speed. When the tape retraction speed is high speed, the adjustment knob 421 and the retaining ring 41 are at the highest position, the retaining ring 41 is located in the retaining groove 326, and the second adjustment surface 3261 abuts against the stepped surface 4121 away from the slider 32. As the wheel hub 21 rotates, the slider 32 gradually approaches the reduction ring 31. Blocked by the retaining ring 41, the slider 32 does not contact the reduction ring 31. The rotation speed of the wheel hub 21 gradually increases under the action of the coil spring, achieving high-speed retraction. When the tape retraction speed is at the low gear, the retaining ring 41 is located in the retaining groove 326, and the second adjustment surface 3261 abuts against the stepped surface 4121 away from the slider 32. As the wheel hub 21 rotates, the slider 32 gradually approaches the reduction ring 31. When the slider 32 abuts the reduction ring 31, the first reduction bevel 3111 and the second reduction bevel 323 are completely aligned, the reduction bump 311 exerts the greatest force on the slider 32, and the reduction effect on the wheel hub 21 is optimal.
[0058] When the tape is retracted at the medium speed, the retaining ring 41 is located in the retaining groove 326, and the second adjustment surface 3261 abuts the stepped surface 4121 near the slider 32. As the wheel hub 21 rotates, the slider 32 gradually approaches the reduction ring 31. When the slider 32 abuts the reduction ring 31, the first reduction bevel 3111 and the second reduction bevel 323 partially fit together. The force exerted by the reduction bump 311 on the slider 32 is less than that exerted at the low speed, resulting in a weaker deceleration effect on the wheel hub 21 than at the low speed, ultimately achieving medium tape retraction.
[0059] Optionally, in this embodiment, the tape retraction speed is divided into three gears. In other embodiments, the tape retraction speed can be divided into two or other number of gears, and it is only necessary to adjust the number of stepped surfaces 4121 of the first adjustment surface 412, which is not limited by the present invention.
[0060] In order to achieve the relative position fixation of the snap ring 41, in this embodiment, the adjustment knob 421 includes a self-locking mechanism (not shown). It is understandable that when the adjustment knob 421 is rotated, the self-locking mechanism prevents the adjustment knob 421 from rotating, preventing the snap ring 41 from moving when the knob is released.
[0061] In order to reduce the friction between the snap ring 41 and the slider 32, in this embodiment, a lubricating liquid is provided between the snap ring 41 and the slider 32. Specifically, the lubricating liquid is used to reduce the friction between the snap ring 41 and the slot 326 to prevent wear.
[0062] The beneficial effects of the adjustable centrifugal deceleration tape 100 provided by the present invention are:
[0063] The adjustable centrifugal reduction tape measure 100 of the present invention includes a housing 10, a hub assembly 20, a reduction mechanism 30 and an adjustment mechanism 40. A rotating shaft 111 is provided in the housing 10. The hub assembly 20 is located in the housing 10 and is used to install the tape measure. The hub assembly 20 is sleeved on the rotating shaft 111 and can rotate around the rotating shaft 111. The reduction mechanism 30 includes a reduction ring 31 and a slider 32. The reduction ring 31 is fixedly arranged in the housing 10. The slider 32 is slidably connected to the hub assembly 20, and the slider 32 can approach or move away from the reduction ring 31. The adjustment mechanism 40 is used to adjust the maximum sliding distance of the slider 32 toward the reduction ring 31.
[0064] The present invention provides a reduction ring 31 and a slider 32. When the hub assembly 20 rotates at high speed, the slider 32 slides relative to the hub assembly 20 under the action of centrifugation and gradually approaches the reduction ring 31. When the slider 32 collides with the reduction ring 31, the reaction force exerted on the slider 32 can decelerate the hub assembly 20, thereby reducing the tape recovery speed. In addition, the adjustment mechanism 40 can adjust the maximum sliding distance of the slider 32 toward the reduction ring 31, thereby adjusting the distance between the slider 32 and the reduction ring 31 when the slider 32 slides to the outermost side. When the slider 32 does not contact the reduction ring 31 at all, the tape recovery is high-speed. When the slider 32 contacts the reduction ring 31, the tape recovery is low-speed. The present invention can reduce the tape recovery speed, avoid cutting hands, and improve safety performance. It can also adjust the tape recovery speed to achieve different recovery speed gear switching to meet the needs of different working conditions.
[0065] The above is only a specific implementation method of the present invention, but the protection scope of the present invention is not limited to this. Any changes or replacements that can be easily thought of by any technician familiar with this technical field within the technical scope disclosed in the present invention should be covered by the protection scope of the present invention.
Claims
1. An adjustable centrifugal deceleration tape, characterized in that: include: a housing, wherein a rotating shaft is disposed in the housing; A hub assembly, the hub assembly being located in the housing, the hub assembly being sleeved on the rotating shaft, and being capable of rotating around the rotating shaft; a reduction mechanism, the reduction mechanism comprising a reduction ring and a slider, the reduction ring being fixedly disposed in the housing, the slider being slidably connected to the hub assembly, and the slider being capable of approaching or moving away from the reduction ring; An adjusting mechanism is used to adjust a maximum sliding distance of the slider toward the reduction ring.
2. The adjustable centrifugal deceleration tape according to claim 1, characterized in that: The wheel hub assembly is provided with a sliding groove, the slider is slidably engaged with the sliding groove, a reset member is provided between the slider and the wheel hub assembly, and the reset member is used to move the slider away from the reduction ring.
3. The adjustable centrifugal deceleration tape according to claim 1 or 2, characterized in that: Deceleration bumps are arranged at intervals on the inner wall of the deceleration ring, and a first deceleration inclined surface is provided on the deceleration bumps. A second deceleration inclined surface is provided on the end of the slider close to the deceleration ring. The first deceleration inclined surface is inclined relative to the tangent direction of the deceleration ring. When the hub assembly rotates about a first direction and the slider approaches and abuts against the deceleration ring, the first deceleration inclined surface and the second deceleration inclined surface are in contact with each other.
4. The adjustable centrifugal deceleration tape according to claim 3, characterized in that: A first guide bevel is also provided on the deceleration bump, and a second guide bevel is also provided on the end of the slider close to the deceleration ring. The first guide bevel is inclined relative to the tangent direction of the deceleration ring and is opposite to the inclination direction of the first deceleration bevel. When the hub assembly rotates in the second direction and the slider approaches and abuts the deceleration ring, the first guide bevel is in contact with the second guide bevel.
5. The adjustable centrifugal deceleration tape according to claim 4, characterized in that: A first transition surface is also provided on the deceleration bump, and the first transition surface is located between the first deceleration inclined surface and the first guide inclined surface. A second transition surface is also provided on the end of the slider close to the deceleration ring, and the second transition surface is located between the second deceleration inclined surface and the second guide inclined surface.
6. The adjustable centrifugal deceleration tape according to claim 1, characterized in that: The adjustment mechanism includes a retaining ring and a driving assembly, a first adjustment surface is provided on the retaining ring, a retaining groove is provided on one side of the slider, a second adjustment surface is provided in the retaining groove, and the driving assembly is used to drive the retaining ring closer to or away from the slider so that the retaining ring enters the retaining groove. The first adjustment surface cooperates with the second adjustment surface to adjust the maximum sliding distance of the slider toward the deceleration ring.
7. The adjustable centrifugal deceleration tape according to claim 6, characterized in that: The driving assembly includes an adjusting knob, one side of the adjusting knob is fixedly connected to the retaining ring, a first wedge block is provided on the side of the adjusting knob facing the retaining ring, and a second wedge block is provided on the side of the retaining ring facing the adjusting knob. An opening is provided on the shell, and the adjusting knob is rotatably installed on the outside of the shell. The retaining ring is located on the inside of the shell so that the first wedge block or the second wedge block cooperates with the opening to adjust the distance between the retaining ring and the slider. The adjusting mechanism also includes an elastic member, both ends of the elastic member are respectively connected to the shell and the adjusting knob, and the elastic member is used to tighten the adjusting knob toward the slider.
8. The adjustable centrifugal deceleration tape according to claim 7, characterized in that: The first wedge block and the second wedge block are both arc-shaped, and the first wedge block and the second wedge block are arranged around the rotation center of the adjusting knob.
9. The adjustable centrifugal deceleration tape according to claim 6, characterized in that: The first adjustment surface includes a plurality of stepped surfaces. When the retaining ring moves toward or away from the slider, the second adjustment surface abuts against different stepped surfaces to adjust the maximum sliding distance of the slider toward the speed reduction ring.
10. The adjustable centrifugal deceleration tape according to claim 6, characterized in that: Lubricating liquid is provided between the clamping ring and the sliding block.