Hoop

Abstract

The invention relates to the technical field of fixing devices, and particularly discloses a hoop which comprises a hoop shell, a rotating shaft, a gear, a fastening piece and a locking piece, the hoop shell is provided with a through hole, the rotating shaft is rotationally arranged in the hoop shell, the gear is fixed to the rotating shaft and located in the through hole, the first end of the fastening piece is fixed to the hoop shell, and the second end of the fastening piece penetrates through the through hole; the fastening piece is provided with a plurality of tooth hole grooves which are distributed at equal intervals in the length direction of the fastening piece, the gear and the tooth hole grooves are meshed all the time, the gear rotates to drive the fastening piece to be tightened or loosened, the locking piece is fixed to the rotating shaft, and the hoop shell is provided with a limiting part. The rotating shaft can slide in the axial direction of the rotating shaft relative to the hoop shell so that the locking piece can be connected with the limiting part in a clamped mode and limit rotation of the rotating shaft, or the locking piece can be separated from the limiting part. The locking piece and the gear share the same rotating shaft, so that the hoop is simple in structure; in addition, the locking piece locks or unlocks the position of the gear and drives the gear to rotate by controlling the rotating shaft, and operation is convenient and fast.

Description

Technical Field

[0001] The invention relates to the technical field of fixing devices, and in particular to a clamp. Background Art

[0002] The clamp has the characteristics of torsion resistance, pressure resistance, and balanced torsional torque, and is widely used in various industries.

[0003] The existing clamp usually includes a clamp shell, a fastening plate, a gear and a fixed block. One end of the fastening plate is fixedly connected to the clamp shell, and the other end movably passes through the clamp shell. A tooth hole groove is provided on the fastening plate. The gear and the clamp shell are rotatably connected, and the tooth portion of the gear can cooperate with the tooth hole groove. The fixed block is slidably arranged on the clamp shell, and the fixed block can cooperate with or separate from the gear. When the fixed block and the gear are separated, the gear can be rotated, and the gear can drive the fastening plate to move relative to the clamp shell, so that the clamp is tightened or loosened; when the fixed block and the gear cooperate, the fixed block clamps the gear, so that the gear cannot be rotated. However, the fixed block of the clamp needs to be set independently, resulting in a large number of parts of the clamp as a whole, and the fixed block needs to occupy a large active space of the clamp shell, resulting in a bloated and complex structure of the clamp; in addition, when the clamp is in use, the fixed block and the gear need to be operated separately, so the user needs to frequently switch the operation object between the fixed block and the gear, which is inconvenient to operate and has low efficiency. Summary of the invention

[0004] The object of the present invention is to provide a clamp to simplify the clamp structure and improve the operability and operation efficiency of the clamp.

[0005] The present invention provides a clamp, which comprises a clamp shell, a rotating shaft, a gear and a fastening sheet, wherein the clamp shell is provided with a through hole, the rotating shaft is rotatably arranged on the clamp shell, the gear is fixed to the rotating shaft and is located in the through hole, the first end of the fastening sheet is fixed to the clamp shell, the second end of the fastening sheet passes through the through hole, a plurality of tooth hole grooves are provided on the fastening sheet, the plurality of tooth hole grooves are arranged at equal intervals along the length direction of the fastening sheet, the gear and the tooth hole grooves are always meshed, and the rotation of the gear can drive the fastening sheet to tighten or loosen, the clamp also comprises a locking member fixed to the rotating shaft, and the clamp shell is provided with a limiting portion;

[0006] The rotating shaft can also slide relative to the hoop shell along the axial direction of the rotating shaft, so that the locking member can be engaged with the limiting portion and limit the rotation of the rotating shaft, or the locking member can be separated from the limiting portion.

[0007] As a preferred technical solution of the clamp, the clamp further includes an elastic member, and the elastic member is configured to ensure that the locking member always has a movement tendency to engage with the limiting portion.

[0008] As a preferred technical solution of the clamp, the elastic member is a compression spring, the compression spring is located outside the through hole, the locking member is located inside the through hole, and the locking member is located between the gear and the compression spring;

[0009] The clamp further comprises a spring seat fixedly arranged on the rotating shaft, and two ends of the compression spring are respectively in contact with the spring seat and the outer wall of the clamp shell.

[0010] As an optimal technical solution for the clamp, the clamp also includes a plurality of guide ribs fixed to the rotating shaft, the plurality of guide ribs are evenly distributed along the circumferential direction of the rotating shaft, the guide ribs extend along the axial direction of the rotating shaft, the compression spring is simultaneously sleeved on the plurality of guide ribs, and the compression spring is supported by the plurality of guide ribs.

[0011] As a preferred technical solution of the clamp, the clamp further includes a first limit plate fixedly arranged on the rotating shaft, and the first limit plate is located between the locking member and the gear;

[0012] When the locking member is engaged with the limiting portion, the first limiting plate abuts against the hoop shell, and the guide rib is separated from the hoop shell; when the locking member is separated from the limiting portion, the first limiting plate is separated from the hoop shell, and the guide rib abuts against the hoop shell.

[0013] As a preferred technical solution of the clamp, the inner diameter of the compression spring is larger than the outer diameter of the gear and larger than the outer diameter of the locking member.

[0014] As a preferred technical solution of the clamp, the limiting portion includes a plurality of limiting protrusions convexly provided on the inner wall of the clamp shell, the plurality of limiting protrusions are evenly and spacedly arranged along the circumferential direction of the rotating shaft, and a limiting groove is formed between any two adjacent limiting protrusions, and the locking member can be inserted into any of the limiting grooves; or,

[0015] The limiting portion includes a limiting hole arranged on the hoop shell, the rotating shaft is passed through the limiting hole, the locking piece can be inserted into the limiting hole or separated from the limiting hole, and the limiting hole and the locking piece are both regular polygonal in shape and have the same number of sides.

[0016] As a preferred technical solution of the clamp, the radius of the rotating shaft is equal to the radius of the inscribed circle of the limiting hole.

[0017] As a preferred technical solution of the clamp, the clamp further includes a second limit plate and a third limit plate fixed at intervals on the rotating shaft;

[0018] When the locking member is engaged with the limiting portion, the second limiting plate abuts against the hoop shell, and the third limiting plate is separated from the hoop shell; when the locking member is separated from the limiting portion, the second limiting plate is separated from the hoop shell, and the third limiting plate abuts against the hoop shell.

[0019] As a preferred technical solution of the clamp, the clamp shell includes a clamp shell cover and a clamp shell seat, the clamp shell cover and the clamp shell seat are clamped and surrounded to form the through hole and the gear shaft hole connected to the through hole, and the rotating shaft is rotatably inserted into the gear shaft hole.

[0020] The clamp provided by the present invention has at least the following beneficial effects:

[0021] The hoop comprises a hoop shell, a rotating shaft, a gear, a fastening plate and a locking piece. The hoop shell is provided with a through hole, the rotating shaft is rotatably arranged on the hoop shell, the gear is fixed on the rotating shaft and is located in the through hole, the first end of the fastening plate is fixed to the hoop shell, the second end of the fastening plate passes through the through hole, a plurality of tooth hole grooves are provided on the fastening plate, the plurality of tooth hole grooves are arranged at equal intervals along the length direction of the fastening plate, the gear and the tooth hole grooves are always meshed, and the rotation of the gear can drive the fastening plate to tighten or loosen, the locking piece is fixed to the rotating shaft, and the hoop shell is provided with a limiting portion; the rotating shaft can also slide along the axial direction of the rotating shaft relative to the hoop shell, so that the locking piece can be engaged with the limiting portion and limit the rotation of the rotating shaft, or the locking piece can be separated from the limiting portion. Since the locking piece and the gear share the same rotating shaft, the number of parts of the hoop can be reduced and the structure of the hoop can be simplified; in addition, the locking piece can lock or unlock the position of the gear and drive the gear to rotate by controlling the rotating shaft, which is convenient to operate. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural schematic diagram of a hoop shell in an embodiment of the present invention;

[0023] Figure 2 for Figure 1 Magnified view at A in the middle;

[0024] Figure 3 is a first cross-sectional view of the hoop shell in an embodiment of the present invention (the locking member is in the locking position);

[0025] Figure 4 is a second cross-sectional view of the hoop shell in the embodiment of the present invention (the locking member is in the unlocked position);

[0026] Figure 5 It is a schematic diagram of a first partial structure of a hoop shell in an embodiment of the present invention;

[0027] Figure 6 An exploded view of a first partial structure of a hoop shell in an embodiment of the present invention;

[0028] Figure 7It is a schematic diagram of a second partial structure of the hoop shell in an embodiment of the present invention;

[0029] Figure 8 An exploded view of a second partial structure of the hoop shell in an embodiment of the present invention;

[0030] Fig. 9 An exploded view of a third partial structure of the hoop shell in an embodiment of the present invention;

[0031] Fig.10 Schematic diagram of the third partial structure of the hoop shell in the embodiment of the present invention.

[0032] In the figure:

[0033] 10, hoop shell; 101, through hole; 102, gear shaft hole; 103, limit hole; 20, rotating shaft; 30, gear; 40, fastening plate; 401, tooth hole groove; 402, third clamping hole; 50, locking member; 60, connecting member; 601, plug-in slot; 70, elastic member; 80, spring seat; 90, guide rib; 100, first limit plate; 110, second limit plate; 120, third limit plate;

[0034] 11. Hoop shell cover; 111. First cover body side plate; 112. Second cover body side plate; 113. Top plate; 114. First U-shaped hole; 115. Third U-shaped hole; 12. Hoop shell seat; 121. First seat body side plate; 122. Second seat body side plate; 123. Bottom plate; 124. Second U-shaped hole; 125. Fourth U-shaped hole;

[0035] 21. first clamping hole; 22. first clamping piece;

[0036] 31. second clamping hole; 32. second clamping piece;

[0037] 4. The third card connector. DETAILED DESCRIPTION

[0038] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0039] In the description of the present invention, it should be noted that the orientations or positional relationships indicated by the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. Among them, the terms "first position" and "second position" are two different positions, and the first feature "above", "above" and "above" the second feature include the first feature being directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. The first feature "below", "below" and "below" the second feature include the first feature being directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0040] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0041] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0042] The present embodiment provides a clamp, which can be used to connect two pipes together, specifically to connect the corrugated pipe and the air outlet seat of the range hood together.

[0043] Please refer to Figures 1 to 4The hoop comprises a hoop shell 10, a rotating shaft 20, a gear 30 and a fastening plate 40. The hoop shell 10 is provided with a through hole 101, the rotating shaft 20 is rotatably arranged on the hoop shell 10, the gear 30 is fixed to the rotating shaft 20 and is located in the through hole 101. Specifically, in this embodiment, the hoop shell 10 is also provided with a gear shaft hole 102, the gear shaft hole 102 is connected with the through hole 101, and the rotating shaft 20 is rotatably arranged in the gear shaft hole 102. The first end of the fastening plate 40 is fixed to the hoop shell 10, and the second end of the fastening plate 40 passes through the through hole 101. The fastening plate 40 is provided with a plurality of tooth hole grooves 401, and the plurality of tooth hole grooves 401 are arranged at equal intervals along the length direction of the fastening plate 40. The gear 30 and the tooth hole groove 401 are always meshed, and the rotation of the gear 30 can drive the fastening plate 40 to tighten or loosen, thereby realizing that the hoop tightens the corrugated pipe to the air outlet seat, or loosens the corrugated pipe.

[0044] It should be noted that the spacing between any two adjacent tooth hole grooves 401 on the fastening plate 40 is equal to the tooth spacing between two adjacent tooth portions of the gear 30, so that when the gear 30 rotates, just like the gear 30 and the rack structure, the fastening plate 40 can be driven to move relative to the hoop shell 10 to achieve tightening or loosening of the fastening plate 40.

[0045] When the clamp is tightened, in order to prevent the clamp from loosening, the existing clamp is usually provided with a fixed block, which is slidably arranged on the clamp shell 10, and the fixed block can cooperate with or separate from the gear 30. When the fixed block and the gear 30 are separated, the gear 30 can be rotated, and the gear 30 can drive the fastening plate 40 to move relative to the clamp shell 10, so that the clamp is tightened or loosened; when the fixed block and the gear 30 are matched, the fixed block will clamp the gear 30, so that the gear 30 cannot be rotated. However, the fixed block of the clamp needs to be set independently, resulting in a large number of parts of the clamp as a whole, and the fixed block needs to occupy a large active space of the clamp shell 10, resulting in a bloated and complex structure of the clamp; in addition, when the clamp is in use, the fixed block and the gear 30 need to be operated separately, so the user needs to frequently switch the operation object between the fixed block and the gear 30, which is inconvenient to operate and has low efficiency.

[0046] In this regard, the clamp provided in this embodiment further includes a locking member 50 fixed to the rotating shaft 20, and the clamp housing 10 is provided with a limiting portion; the rotating shaft 20 can also be relatively moved along the axial direction of the rotating shaft 20 (such as Figure 2The locking member 50 is slid in the direction indicated by the arrow ef in the figure, so that the locking member 50 can engage with the limiting portion and limit the rotation of the rotating shaft 20, or the locking member 50 is separated from the limiting portion. Specifically, the locking member 50 can have a locking position and an unlocking position as the rotating shaft 20 moves relative to the hoop shell 10. When the locking member 50 is in the locking position, the locking member 50 locks the relative position of the gear 30 and the hoop shell 10, and the gear 30 cannot rotate at this time; when the locking member 50 is in the unlocking position, the gear 30 can be rotated, thereby driving the fastening sheet 40 to tighten or loosen. In the clamp provided in this embodiment, the locking member 50 and the gear 30 share the same rotating shaft 20, which can reduce the number of parts of the clamp and simplify the structure of the clamp; in addition, the locking member 50 can be switched between the locked position and the unlocked position by driving the rotating shaft 20 to slide along the axial direction of the rotating shaft 20. When the locking member 50 is in the unlocked position, the gear 30 can drive the fastening plate 40 to tighten or loosen by driving the rotating shaft 20 to rotate. Therefore, when the clamp is used, only the rotating shaft 20 needs to be operated and controlled, and the operation is more convenient.

[0047] In this embodiment, the length of the tooth hole slot 401 is at least greater than the sum of the length of the gear 30 and the maximum sliding amount of the rotating shaft 20 relative to the hoop shell 10. In this way, it can be ensured that during the sliding process of the rotating shaft 20 relative to the hoop shell 10, the tooth portion of the gear 30 is always engaged with the tooth hole slot 401 of the fastening plate 40.

[0048] Optionally, the clamp further includes a connector 60 fixedly connected to the rotating shaft 20, the connector 60 is located outside the through hole 101, the connector 60 is used to connect the torque wrench, and the rotating shaft 20 can be driven to rotate by rotating the connector 60 through the torque wrench, thereby driving the gear 30 to rotate. The torque wrench drives the connector 60 to move along the axial direction of the rotating shaft 20, and the rotating shaft 20 can be driven to slide relative to the clamp shell 10, thereby switching the locking member 50 between the locked position and the unlocked position. Among them, a plug-in slot 601 can be provided on the connector 60, and the plug-in slot 601 is used to plug and match with the torque wrench. Among them, the plug-in slot 601 can be a slot, a Pozi slot, a cross slot, a hexagonal slot, etc., and can be used to match with a slotted torque wrench, a Pozi torque wrench, a cross torque wrench, and a hexagonal torque wrench in sequence. Among them, the torque wrench can be an electric torque wrench or a manual torque wrench. In other embodiments, the plug-in slot 601 can also be replaced by a plug-in protrusion.

[0049] Optionally, see Figure 3 and Figure 4The clamp further includes an elastic member 70, which is configured to make the locking member 50 always have a movement tendency to engage with the limiting portion. In this way, under the action of the elastic member 70, the locking member 50 can move from the unlocking position to the locking position by itself, so that the connecting member 60 can be stably maintained in the locking position without being affected by external forces, thereby ensuring the stable clamping effect of the clamp.

[0050] Optionally, in this embodiment, the elastic member 70 is specifically a compression spring, the compression spring is located outside the through hole 101, the locking member 50 is located inside the through hole 101, and the locking member 50 is located between the gear 30 and the compression spring; the clamp further includes a spring seat 80 fixedly arranged on the rotating shaft 20, and the two ends of the compression spring are respectively in contact with the spring seat 80 and the outer wall of the clamp shell 10. In this way, the compression spring is arranged outside the through hole 101 and does not occupy the space inside the clamp shell 10, which can effectively reduce the volume requirement of the clamp shell 10 and simplify the overall structure of the clamp.

[0051] As an alternative, the compression spring can also be arranged in the hoop shell 10. Specifically, the compression spring and the locking member 50 are respectively located on both sides of the gear 30, and the two ends of the compression spring are respectively in contact with the gear 30 and the hoop shell 10. In this way, the compression spring can also make the locking member 50 always have a movement tendency to engage with the limiting portion.

[0052] In other embodiments, the elastic member 70 may also be configured as a tension spring or a disc spring, etc. as required.

[0053] Optionally, see Figures 3 to 5 The clamp also includes a plurality of guide ribs 90 fixed to the rotating shaft 20. The plurality of guide ribs 90 are evenly distributed along the circumferential direction of the rotating shaft 20. The guide ribs 90 extend along the axial direction of the rotating shaft 20. The compression spring is also sleeved on the plurality of guide ribs 90, and the compression spring is supported by the plurality of guide ribs 90. The guide ribs 90 can ensure that the compression spring has a stable deformation direction when it is compressed or stretched, thereby ensuring that the force direction of the rotating shaft 20 is stable, so that the rotating shaft 20 can drive the locking member 50 to stably switch between the locked position and the unlocked position. Preferably, the number of the guide ribs 90 is at least three, so that the compression spring can be stably supported.

[0054] Optionally, please refer again to Figures 3 to 5The hoop also includes a first limit plate 100 fixedly arranged on the rotating shaft 20, and the first limit plate 100 is located between the locking member 50 and the gear 30; when the locking member 50 is engaged with the limit portion, the first limit plate 100 abuts against the hoop shell 10, and the guide rib 90 is separated from the hoop shell 10; when the locking member 50 is separated from the limit portion, the first limit plate 100 is separated from the hoop shell 10, and the guide rib 90 abuts against the hoop shell 10. In this way, the first limit plate 100 abuts against the hoop shell 10, so that the locking member 50 can be stably maintained in the limited position, and the guide rib 90 abuts against the hoop shell 10, so that the locking member 50 can be stably maintained in the unlocking position, thereby limiting the sliding range of the rotating shaft 20 relative to the hoop shell 10. Specifically, in this embodiment, the first limit plate 100 is fixed to the end of the locking member 50 away from the guide rib 90.

[0055] Optionally, please refer again to Figures 3 to 5 The hoop also includes a second limiting plate 110 and a third limiting plate 120 fixed to the rotating shaft 20 at intervals; when the locking member 50 is engaged with the limiting portion, the second limiting plate 110 abuts against the hoop shell 10, and the third limiting plate 120 is separated from the hoop shell 10; when the locking member 50 is separated from the limiting portion, the second limiting plate 110 is separated from the hoop shell 10, and the third limiting plate 120 abuts against the hoop shell 10. In this way, the second limiting plate 110 and the first limiting plate 100 form functional redundancy, and the guide rib 90 and the third limiting plate 120 form functional redundancy.

[0056] Specifically, in this embodiment, the second limit plate 110 , the third limit plate 120 , the gear 30 , the first limit plate 100 , the locking member 50 , the guide rib 90 , the spring seat 80 and the connecting member 60 are sequentially arranged along the axial direction of the rotating shaft 20 . The second limit plate 110 is located outside the through hole 101, the third limit plate 120, the gear 30, the first limit plate 100 and the locking member 50 are all located in the through hole 101, the guide rib 90, the spring seat 80 and the connecting member 60 are all located outside the through hole 101, and along the axial direction of the rotating shaft 20, the hoop shell 10 includes a first side wall and a second side wall that are parallel and spaced apart, the second limit plate 110 and the third limit plate 120 are located on both sides of the first side wall, and the second limit plate 110 and the third limit plate 120 are both matched with the first side wall; the first limit plate 100 and the locking member 50 are located on both sides of the second side wall, and the first limit plate 100 and the locking member 50 are both matched with the second side wall, whether the locking member 50 moves to the locked position or the unlocked position, it is stopped by the first side wall and the second side wall, and the force is evenly distributed at the same time, which can avoid deformation of a single side wall due to excessive force, so as to ensure the service life of the hoop shell 10.

[0057] Preferably, the second limit plate 110, the third limit plate 120, the gear 30, the first limit plate 100, the locking member 50, the guide rib 90, the spring seat 80 and the connecting member 60 are integrally formed. This can reduce the number of parts and components, and facilitate the assembly efficiency of the clamp. In other embodiments, it is also possible to make some of the second limit plate 110, the third limit plate 120, the gear 30, the first limit plate 100, the locking member 50, the guide rib 90, the spring seat 80 and the connecting member 60 integrally arranged, and the other parts are separately arranged, or all are separately arranged as needed.

[0058] Optionally, the inner diameter of the compression spring is larger than the outer diameter of the gear 30 and larger than the outer diameter of the locking member 50. Specifically, in this embodiment, the inner diameter of the compression spring is also larger than the inner diameters of the second limiting plate 110 and the third limiting plate 120. When the second limiting plate 110, the third limiting plate 120, the gear 30, the first limiting plate 100, the locking member 50, the guide rib 90, the spring seat 80 and the connecting member 60 are integrally configured as a whole, the compression spring can be inserted into the rotating shaft 20 from one end of the second limiting plate 110 and abut against the spring seat 80, which is convenient for assembly.

[0059] Optionally, see Figures 3 to 5 The limiting part includes a limiting hole 103 provided on the hoop shell 10, the rotating shaft 20 is provided through the limiting hole 103, the locking member 50 can be inserted into the limiting hole 103 or separated from the limiting hole 103, and the limiting hole 103 and the locking member 50 are both regular polygonal shapes with the same number of sides. Specifically, the shape of the limiting hole 103 is adapted to the shape of the locking member 50, and the size of the limiting hole 103 is adapted to the size of the locking member 50. When the locking member 50 is in the locking position, the locking member 50 is inserted into the limiting hole 103, and the locking member 50 can be limited to rotate by the hoop shell 10, thereby limiting the rotation of the rotating shaft 20 and the gear 30, so as to lock the relative position of the gear 30 and the hoop shell 10; when the locking member 50 is in the unlocking position, the locking member 50 is disengaged from the limiting hole 103, and the locking member 50 can rotate synchronously with the gear 30.

[0060] In this embodiment, the limiting hole 103 and the locking member 50 are both in the shape of a regular hexagon. In other embodiments, the limiting hole 103 and the locking member 50 may be both in the shape of a regular octagon, a regular decagon, etc. In the process of clamping the clamp, at most the rotating shaft 20 needs to be rotated by the central angle corresponding to one side of the regular polygon to align the locking member 50 and the limiting hole 103, so as to facilitate the plug-in fit of the two, and as the number of sides of the regular polygon increases, the central angle becomes smaller and smaller.

[0061] Optionally, the radius of the rotating shaft 20 is equal to the radius of the inscribed circle of the limiting hole 103. With such a configuration, when the locking member 50 is in the unlocked position, the rotating shaft 20 is located in the limiting hole 103, and the outer peripheral surface of the rotating shaft 20 can contact each side point of the limiting hole 103, thereby ensuring the stability of the support for the rotating shaft 20 and avoiding the phenomenon of tooth jumping due to unstable support of the rotating shaft 20 when the rotating shaft 20 is rotated. In other embodiments, the radius of the rotating shaft 20 can also be less than the radius of the inscribed circle of the limiting hole 103 as required.

[0062] As an alternative solution, the limiting part includes a plurality of limiting protrusions protruding from the inner wall of the hoop shell 10, and the plurality of limiting protrusions are evenly and spacedly arranged along the circumferential direction of the rotating shaft 20, and a limiting groove is formed between any two adjacent limiting protrusions, and the locking member 50 can be inserted into any limiting groove. Specifically, when the locking member 50 is in the locking position, the locking member 50 is inserted into the limiting groove, and the locking member 50 can also be limited by the hoop shell 10 to rotate, thereby limiting the rotation of the rotating shaft 20 and the gear 30, so as to lock the relative position of the gear 30 and the hoop shell 10; when the locking member 50 is in the unlocking position, the locking member 50 is disengaged from the limiting groove, and the locking member 50 can rotate synchronously with the gear 30. Preferably, the plurality of limiting protrusions can be integrally formed with the hoop shell 10 by a stamping process. In other embodiments, the plurality of limiting protrusions can also be welded to the hoop shell 10 by a welding process.

[0063] Optionally, see Figure 2 , Figures 6 to 10 The hoop shell 10 includes a hoop shell cover 11 and a hoop shell seat 12, which are clamped and enclosed to form a through hole 101 and a gear shaft hole 102 connected to the through hole 101. Specifically, the hoop shell cover 11 and the hoop shell seat 12 are arranged along a first direction (such as Figure 2 The through hole 101 is arranged along the second direction (as shown by the arrows ab in FIG. Figure 2 The gear shaft hole 102 extends in the third direction (as shown by the cd arrow in FIG. Figure 2 The first direction, the second direction and the third direction extend in the direction indicated by the arrow ef in FIG. 1 , that is, the axial direction of the rotating shaft 20, and the first direction, the second direction and the third direction are perpendicular to each other.

[0064] Optionally, the hoop shell 10 further includes a plurality of first clamping structures and a plurality of second clamping structures. The first clamping structure includes a first clamping hole 21 and a first clamping piece 22, the first clamping hole 21 is provided in one of the hoop shell cover 11 and the hoop shell seat 12, and the first clamping hole 21 extends along a first direction, the first clamping piece 22 is provided in the other of the hoop shell cover 11 and the hoop shell seat 12, and the first clamping piece 22 is clamped to the first clamping hole 21; the second clamping structure includes a second clamping hole 31 and a second clamping piece 32, the second clamping hole 31 is provided in one of the hoop shell cover 11 and the hoop shell seat 12, and the second clamping hole 31 extends along a third direction, the second clamping piece 32 is provided in the other of the hoop shell cover 11 and the hoop shell seat 12, and the second clamping piece 32 is clamped to the second clamping hole 31. With such arrangement, the hoop shell cover 11 and the hoop shell seat 12 can be fixed together in the first direction by the first clamping structure, and the first clamping piece 22 can be limited by the side wall of the first clamping hole 21, and a certain restraining effect can be exerted on the hoop shell cover 11 and the hoop shell seat 12 in the second direction and the third direction; the hoop shell cover 11 and the hoop shell seat 12 can be fixed together in the third direction by the second clamping structure, and the second clamping piece 32 can be limited by the side wall of the second clamping hole 31, and a certain restraining effect can be exerted on the hoop shell cover 11 and the hoop shell seat 12 in the first direction and the second direction, so that the hoop shell cover 11 and the hoop shell seat 12 can be stably connected together, thereby ensuring the structural stability of the hoop shell 10.

[0065] Among them, this embodiment exemplifies a solution in which the first clamping holes 21 of each first clamping structure are all arranged on the hoop shell cover 11, and the first clamping pieces 22 of each first clamping structure are all arranged on the hoop shell seat 12; and the second clamping pieces 32 of each second clamping structure are all arranged on the hoop shell cover 11, and the second clamping holes 31 of each second clamping structure are all arranged on the hoop shell seat 12. In other embodiments, the first clamping piece 22 of each first clamping structure may be provided with the hoop shell cover 11, and the first clamping hole 21 of each first clamping structure may be provided with the hoop shell seat 12; or, the first clamping piece 22 of a part of the first clamping structure may be provided on the hoop shell cover 11, and the first clamping hole 21 may be provided on the hoop shell seat 12, and the first clamping hole 21 of another part of the first clamping structure may be provided on the hoop shell cover 11, and the first clamping piece 22 may be provided on the hoop shell seat 12; the second clamping hole 31 of each second clamping structure may also be provided with the hoop shell cover 11, and the second clamping piece 32 may be provided on the hoop shell seat 12; or, the second clamping piece 32 of a part of the second clamping structure may be provided on the hoop shell cover 11, and the second clamping hole 31 may be provided on the hoop shell seat 12, and the second clamping hole 31 of another part of the second clamping structure may be provided on the hoop shell cover 11, and the second clamping piece 32 may be provided on the hoop shell seat 12.

[0066] Optionally, see Fig. 9The hoop shell cover 11 includes a first cover body side plate 111 and a second cover body side plate 112 spaced apart along a third direction, and a top plate 113 connected between the first cover body side plate 111 and the second cover body side plate 112; the hoop shell seat 12 includes a first seat body side plate 121 and a second seat body side plate 122 spaced apart along the third direction, and a bottom plate 123 connected between the first seat body side plate 121 and the second seat body side plate 122, the bottom plate 123 and the top plate 113 are parallel and spaced apart along the first direction, the first cover body side plate 111 and the first seat body side plate 121 are staggered along the first direction, and the second cover body side plate 112 and the second seat body side plate 122 are staggered along the first direction, the gear shaft hole 102 is surrounded by the first cover body side plate 111 and the first seat body side plate 121, and the limiting hole 103 is surrounded by the second cover body side plate 112 and the second seat body side plate 122. In this way, the structural strength of the hoop shell 10 is further improved by staggering the first cover body side panel 111 and the first seat body side panel 121 along the first direction, and by staggering the second cover body side panel 112 and the second seat body side panel 122 along the first direction; in addition, the gear shaft hole 102 is jointly formed by the first seat body side panel 121 and the second seat body side panel 122, and the limiting hole 103 is jointly formed by the second cover body side panel 112 and the second seat body side panel 122, so that the rotating shaft 20 is supported by the two cover body side panels and the two seat body side panels at the same time, thereby ensuring the stability of the support for the rotating shaft 20.

[0067] For details, please refer to Figure 8 and Fig. 9 In this embodiment, the first cover body side plate 111 is provided with a first U-shaped hole 114, and the first seat body side plate 121 is provided with a second U-shaped hole 124. The opening of the first U-shaped hole 114 is opposite to the opening of the second U-shaped hole 124, and the first U-shaped hole 114 and the second U-shaped hole 124 are staggered along the first direction and are arranged to form a gear shaft hole 102. The second cover body side plate 112 is provided with a third U-shaped hole 115, and the second seat body side plate 122 is provided with a fourth U-shaped hole 125. The opening of the third U-shaped hole 115 is opposite to the opening of the fourth U-shaped hole 125, and the third U-shaped hole 115 and the fourth U-shaped hole 125 are staggered along the first direction and are arranged to form a limiting hole 103. Such a configuration facilitates the assembly of the rotating shaft 20 and other components such as the gear 30 disposed on the rotating shaft 20 into a whole, and then the whole is assembled with the hoop shell cover 11 and the hoop shell seat 12.

[0068] Optionally, see Figure 2 and Fig.10, along the third direction, the first seat body side plate 121 and the second seat body side plate 122 are both located between the first cover body side plate 111 and the second cover body side plate 112, and the two first seat body side plates 121 and the second seat body side plates 122 are both in contact with the top plate 113 along the first direction. In this way, the top plate 113 can be supported and limited by the first seat body side plate 121 and the second seat body side plate 122, which can further improve the structural stability of the hoop shell 10. Preferably, the spacing between the first seat body side plate 121 and the second seat body side plate 122 is adapted to the width of the fastening plate 40, and the second end of the fastening plate 40 slides and fits with the bottom plate 123 when moving in the through hole 101, which can ensure the stability of the fastening plate 40 moving in the through hole 101 and avoid jamming.

[0069] In other embodiments, the first cover body side panel 111 and the second base body side panel 122 can be both located between the first base body side panel 121 and the second base body side panel 122, and the first cover body side panel 111 and the second base body side panel 122 can both abut against the bottom plate 123 along the first direction; or, the first cover body side panel 111, the first base body side panel 121, the second cover body side panel 112 and the second base body side panel 122 can be arranged in sequence along a third direction, and the first base body side panel 121 and the top plate 113 can abut against each other along the first direction, and the second cover body side panel 112 and the bottom plate 123 can abut against each other along the first direction.

[0070] Optionally, see Figure 2 and Fig.10 The first clamping holes 21 of the plurality of first clamping structures are all arranged on the top plate 113, and a part of the first clamping pieces 22 of the plurality of first clamping structures are arranged on the first seat body side plate 121, and another part is arranged on the second seat body side plate 122. In this way, the first seat body side plate 121 and the second seat body side plate 122 can both be connected to the hoop shell cover 11 through the first clamping structure, so as to ensure the connection stability between the hoop shell cover 11 and the hoop shell seat 12 in the first direction.

[0071] Optionally, see Fig. 9 and Fig.10 The top plate 113 is square, and the first clamping holes 21 are provided at two corners on at least one diagonal line of the top plate 113. In this way, the two corners on at least one diagonal line of the top plate 113 are respectively connected to the first seat body side plate 121 and the second seat body side plate 122 through the first clamping structure, which can further improve the connection stability of the hoop shell cover 11 and the hoop shell seat 12 in the first direction, and to a certain extent, it is not necessary or a small amount of first clamping structures can be provided at other positions.

[0072] Specifically, the present embodiment exemplarily provides a solution in which the first clamping holes 21 are provided at two corners on one diagonal line of the top plate 113. In other embodiments, the first clamping holes 21 may be provided at the four corners of the top plate 113, and the four corners of the top plate 113 are connected to the hoop shell seat 12 through the first clamping structure. It should be noted that the total number of the first clamping structures is not limited in the present embodiment and can be set according to actual needs.

[0073] Optionally, see Fig. 9 and Fig.10 , the second clamping hole 31 of a part of the second clamping structure is set on the first seat body side plate 121, and the second clamping piece 32 is set on the first cover body side plate 111; the second clamping hole 31 of another part of the second clamping structure is set on the second seat body side plate 122, and the second clamping piece 32 is set on the second cover body side plate 112. In this way, the first seat body side plate 121 and the first cover body side plate 111 are connected by the second clamping mechanism, and the second seat body side plate 122 and the second cover body side plate 112 are connected by the second clamping structure, which can further improve the structural stability of the hoop shell 10.

[0074] In this embodiment, the number of the second clamping structures is two, and the two second clamping structures are both centrally arranged along the first direction and are relatively arranged along a diagonal line of the clamp, which can further improve the structural strength of the clamp shell 10. Preferably, the connecting line between the two second clamping structures forms an angle with the connecting line between the two first clamping structures, so as to further improve the structural strength of the clamp shell 10.

[0075] In other embodiments, second clamping holes 31 may be provided at both ends of the first seat body side plate 121 along the second direction and at both ends of the second seat body side plate 122 along the second direction; second clamping pieces 32 may be provided at both ends of the first cover body side plate 111 along the second direction and at both ends of the second cover body side plate 112 along the second direction, and four second clamping pieces 32 and four second clamping holes 31 may be clamped one by one. It should be noted that the total number of the second clamping structures is not limited in this embodiment and may be set according to actual needs.

[0076] Optionally, see Figure 6 and Figure 7The hoop shell 10 further includes a plurality of third clamping pieces 4 disposed on the hoop shell seat 12, and the third clamping pieces 4 are used to clamp with the fastening piece 40. Such a configuration facilitates fixing the first end of the fastening piece 40 to the hoop shell seat 12. Specifically, the third clamping piece 4 is disposed on the bottom plate 123, and the fastening piece 40 is provided with a third clamping hole 402, and the third clamping piece 4 is clamped with the third clamping hole 402. Specifically, in this embodiment, two third clamping pieces 4 are disposed on the bottom plate 123, and the fastening piece 40 is correspondingly provided with two third clamping holes 402, and the two third clamping pieces 4 are clamped with the two third clamping holes 402 in a one-to-one correspondence, and the two third clamping pieces 4 are arranged opposite to each other along the second direction. In other embodiments, the number of the third clamping pieces 4 disposed on the bottom plate 123 can also be set according to actual needs.

[0077] In addition, the first end of the fastening piece 40 is disposed outside the through hole 101 , which can avoid affecting the movement of the second end of the fastening piece 40 in the through hole 101 .

[0078] Optionally, see Figures 6 to 10 , the first clip 22 is arranged on the hoop shell seat 12, the first clip hole 21 is arranged on the hoop shell cover 11, the second clip 32 is arranged on the hoop shell cover 11, and the second clip hole 31 is arranged on the hoop shell seat 12; the hoop shell seat 12 and each first clip 22 are integrally formed, and / or, the hoop shell cover 11 and each second clip 32 are integrally formed. Specifically, in this embodiment, the hoop shell seat 12 and all the first clips 22 are integrally formed, and can be integrally processed by a stamping and bending process; the hoop shell cover 11 and all the second clips 32 are integrally formed, and can be integrally processed by a stamping and bending process, the processing method is simple, and the processing cost is low. In other embodiments, the hoop shell seat 12 and each first clip 22 can also be separately provided and fixed by a welding process; the hoop shell cover 11 and each second clip 32 can also be separately provided and fixed by a welding process.

[0079] In this embodiment, the first card plate 22, the second card plate 32 and the third card plate 4 are all thin sheet structures and can be bent. Taking the first card plate 22 as an example, please refer to Fig.10 As shown, after the first engaging piece 22 is engaged with the first engaging hole 21, the portion of the first engaging piece 22 extending out of the first engaging hole 21 is flattened to the top plate 113, thereby achieving the engaging fit between the first engaging piece 22 and the first engaging hole 21. In other embodiments, an elastic hook structure may be used instead of the engaging piece.

[0080] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A clamp, comprising a clamp shell (10), a rotating shaft (20), a gear (30) and a fastening plate (40), wherein the clamp shell (10) is provided with a through hole (101), the rotating shaft (20) is rotatably arranged on the clamp shell (10), the gear (30) is fixed to the rotating shaft (20) and is located in the through hole (101), a first end of the fastening plate (40) is fixed to the clamp shell (10), a second end of the fastening plate (40) passes through the through hole (101), a plurality of tooth hole grooves (401) are provided on the fastening plate (40), the plurality of tooth hole grooves (401) are arranged at equal intervals along the length direction of the fastening plate (40), the gear (30) and the tooth hole groove (401) are always meshed, and the rotation of the gear (30) can drive the fastening plate (40) to tighten or loosen, characterized in that: The clamp further comprises a locking member (50) fixed to the rotating shaft (20), and the clamp shell (10) is provided with a limiting portion; The rotating shaft (20) can also slide relative to the hoop shell (10) along the axial direction of the rotating shaft (20), so that the locking member (50) can be engaged with the limiting portion and limit the rotation of the rotating shaft (20), or the locking member (50) can be separated from the limiting portion.

2. The clamp according to claim 1, characterized in that: The clamp further comprises an elastic member (70), wherein the elastic member (70) is configured to ensure that the locking member (50) always has a movement tendency to engage with the limiting portion.

3. The clamp according to claim 2, characterized in that: The elastic member (70) is a compression spring, the compression spring is located outside the through hole (101), the locking member (50) is located inside the through hole (101), and the locking member (50) is located between the gear (30) and the compression spring; The clamp further comprises a spring seat (80) fixedly arranged on the rotating shaft (20), and two ends of the compression spring are respectively in contact with the spring seat (80) and the outer wall of the clamp shell (10).

4. The clamp according to claim 3, characterized in that: The clamp further comprises a plurality of guide ribs (90) fixed to the rotating shaft (20); the plurality of guide ribs (90) are evenly distributed along the circumferential direction of the rotating shaft (20); the guide ribs (90) extend along the axial direction of the rotating shaft (20); the compression spring is simultaneously sleeved on the plurality of guide ribs (90), and the compression spring is supported by the plurality of guide ribs (90).

5. The clamp according to claim 4, characterized in that: The clamp further comprises a first limit plate (100) fixedly arranged on the rotating shaft (20), wherein the first limit plate (100) is located between the locking member (50) and the gear (30); When the locking member (50) is engaged with the limiting portion, the first limiting plate (100) and the hoop shell (10) are in contact, and the guide rib (90) is separated from the hoop shell (10); when the locking member (50) is separated from the limiting portion, the first limiting plate (100) and the hoop shell (10) are separated, and the guide rib (90) is in contact with the hoop shell (10).

6. The clamp according to claim 4, characterized in that: The inner diameter of the compression spring is larger than the outer diameter of the gear (30) and larger than the outer diameter of the locking member (50).

7. The clamp according to claim 1, characterized in that: The limiting portion comprises a plurality of limiting protrusions protruding from the inner wall of the hoop shell (10), the plurality of limiting protrusions being evenly and spacedly arranged along the circumferential direction of the rotating shaft (20), a limiting groove being formed between any two adjacent limiting protrusions, and the locking member (50) being capable of being inserted into any of the limiting grooves; or, The limiting portion comprises a limiting hole (103) arranged on the hoop shell (10), the rotating shaft (20) is passed through the limiting hole (103), the locking member (50) can be inserted into the limiting hole (103) or separated from the limiting hole (103), and the limiting hole (103) and the locking member (50) are both regular polygonal in shape and have the same number of sides.

8. The clamp according to claim 7, characterized in that: The radius of the rotating shaft (20) is equal to the radius of the inscribed circle of the limiting hole (103).

9. The clamp according to any one of claims 1 to 8, characterized in that: The clamp further comprises a second limiting plate (110) and a third limiting plate (120) which are fixed to the rotating shaft (20) at intervals; When the locking member (50) is engaged with the limiting portion, the second limiting plate (110) and the hoop shell (10) are in contact, and the third limiting plate (120) is separated from the hoop shell (10); when the locking member (50) is separated from the limiting portion, the second limiting plate (110) and the hoop shell (10) are separated, and the third limiting plate (120) is in contact with the hoop shell (10).

10. The clamp according to any one of claims 1 to 8, characterized in that: The hoop shell (10) comprises a hoop shell cover (11) and a hoop shell seat (12); the hoop shell cover (11) and the hoop shell seat (12) are clamped and enclosed to form the through hole (101) and a gear shaft hole (102) connected to the through hole (101); the rotating shaft (20) is rotatably inserted into the gear shaft hole (102).

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