Hoop

Abstract

The utility model relates to the technical field of fixing devices, and particularly discloses a hoop which comprises a hoop shell, a gear, a fastening piece and a locking piece, the hoop shell is provided with a through hole, the gear is located in the through hole and rotationally connected with the hoop shell, a plurality of tooth hole grooves are formed in the length direction of the fastening piece at equal intervals, the first end of the fastening piece is fixed to the hoop shell, and the second end of the fastening piece is fixed to the locking piece. The second end of the locking piece penetrates through the through hole, the gear and the tooth hole groove are meshed all the time, the gear rotates to drive the fastening piece to be tightened or loosened, and the locking piece is movably connected with the hoop shell and can be inserted into or retreated from the tooth groove of the gear. The locking piece is configured to limit the gear to rotate in the first direction and allow the gear to rotate in the second direction opposite to the first direction, the fastening piece is loosened when the gear rotates in the first direction, the fastening piece is tightened when the gear rotates in the second direction, and when the hoop is tightened, the locking piece does not need to be independently retreated from the inserting groove, so that the locking piece is not needed. The locking piece can be driven to retreat from the inserting groove by rotating the gear in the second direction, operation is easy, and the operation efficiency is high.

Description

Technical Field

[0001] This utility model relates to the field of fixing device technology, and in particular to a clamp. Background Technology

[0002] Clamps are characterized by their resistance to torsion, pressure, and balanced torsional torque, and are widely used in various industries.

[0003] Existing clamps typically include a clamp housing, a fastening plate, a gear, and a fixing block. One end of the fastening plate is fixedly connected to the clamp housing, while the other end movably passes through it. The fastening plate has a toothed groove. The gear is rotatably connected to the clamp housing, and the gear teeth can mesh with the toothed groove. The fixing block is slidably mounted on the clamp housing and can engage or disengage with the gear. When the fixing block and gear are disengaged, the gear can rotate, driving the fastening plate to move relative to the clamp housing, thus tightening or loosening the clamp. When the fixing block and gear are engaged, the fixing block locks the gear, preventing it from rotating. However, when tightening the clamp, the operator needs to first disengage the fixing block from the gear before turning it. After the fastening plate is tightened to the appropriate degree, the operator needs to keep the gear in a fixed position while simultaneously operating the fixing block to lock the gear in place. This requires the operator to frequently switch between operating the gear and the fixing block, making the operation inconvenient and inefficient. Utility Model Content

[0004] The purpose of this utility model is to provide a clamp to improve the operability and operating efficiency of the clamp.

[0005] This utility model provides a clamp, which includes a clamp shell, a gear, and a fastening plate. The clamp shell has a through hole, the gear is located in the through hole and is rotatably connected to the clamp shell through a rotating shaft, and the fastening plate has a plurality of toothed grooves. The plurality of toothed grooves are arranged at equal intervals along the length direction of the fastening plate. The first end of the fastening plate is fixed to the clamp shell, and the second end of the fastening plate passes through the through hole. The gear and the toothed grooves are always meshed, and the rotation of the gear can drive the fastening plate to tighten or loosen. The clamp also includes a locking element.

[0006] The locking member is movably connected to the hoop housing so that the locking member can be inserted into or removed from the tooth groove of the gear. When the locking member is inserted into the tooth groove, the locking member is configured to restrict the gear from rotating in a first direction and allow the gear to rotate in a second direction, the first direction and the second direction being opposite. When the gear rotates in the first direction, the fastening plate is loosened, and when the gear rotates in the second direction, the fastening plate is tightened.

[0007] As a preferred technical solution for the clamp, the clamp further includes an elastic element connected between the clamp housing and the locking element, the elastic element being configured to ensure that the locking element always has a tendency to insert into the tooth groove.

[0008] As a preferred embodiment of the clamp, the locking member is rotatable relative to the clamp housing about a predetermined center line, and the locking member is slidable relative to the clamp housing along the predetermined center line. The clamp further includes:

[0009] A knob, connected to the locking member and located outside the hoop, the knob having a first limiting surface perpendicular to the set center line;

[0010] A support block protrudes from the outer side of the hoop shell. The support block has a support surface parallel to the outer side, which is away from the gear relative to the outer side. The first limiting surface can abut against the outer side or against the support surface. When the first limiting surface abuts against the outer side, the locking member is inserted into the tooth groove; when the first limiting surface abuts against the support surface, the locking member is disengaged from the tooth groove.

[0011] As a preferred technical solution for the clamp, the knob also has a first guide surface connected to the first limiting surface, and the first guide surface is set at an angle to the set center line;

[0012] The support block has a second guide surface connected between the support surface and the outer side surface. The first guide surface and the second guide surface are slidably fitted together. When the first limiting surface abuts against the outer side surface and the knob is rotated counterclockwise around the set center line, the first guide surface can slide along the second guide surface and guide the locking member to gradually exit the tooth groove along the direction of the set center line.

[0013] As a preferred technical solution for the clamp, the knob further has a second limiting surface arranged parallel to the set center line. When the first limiting surface abuts against the outer surface and the knob is rotated clockwise around the set center line, the second limiting surface can abut against the support block to limit the position of the knob; and / or,

[0014] When the first limiting surface abuts against the outer side and the knob is rotated counterclockwise around the set center line, the locking member can drive the gear to rotate in the second direction.

[0015] As a preferred technical solution for the clamp, one of the locking member and the knob is provided with a slot, and the other of the locking member and the knob is provided with a plug. The slot and the plug are inserted and can limit the relative position of the knob and the locking member along the set center line direction. When the first limiting surface is in contact with the outer surface, the slot extends out of the clamp shell.

[0016] As a preferred technical solution for the clamp, the locking component includes:

[0017] A rotating shaft is slidably connected to the hoop and can rotate relative to the hoop about the set center line; one end of the rotating shaft is connected to the knob.

[0018] A locking protrusion, connected to the other end of the rotating shaft, is used to insert into or retract from the tooth groove. The locking protrusion includes a third limiting surface and a third guiding surface arranged opposite to each other. The third limiting surface is parallel to the set center line, and the third guiding surface forms an angle with the set center line. When the first limiting surface abuts against the outer surface, the third limiting surface can abut against the gear rotating in the first direction to limit the position of the gear. The third guiding surface can slide against the gear rotating in the second direction and guide the locking member to retract from the tooth groove along the direction of the set center line.

[0019] As a preferred technical solution for the clamp, when the first limiting surface abuts against the outer surface, the depth to which the locking member is inserted into the tooth groove is less than the distance between the first limiting surface and the supporting surface.

[0020] As a preferred embodiment of the clamp, the clamp further includes two limiting members fixed at intervals on the rotating shaft, both limiting members being located outside the clamp housing, and both limiting members being able to abut against the clamp housing along the axial direction of the rotating shaft; and / or,

[0021] The clamp also includes a connector that is coaxial with and fixedly connected to the rotating shaft, the connector being used to connect a torque wrench.

[0022] As a preferred technical solution for the clamp, the clamp shell includes a base and a cover, the cover and the base are snapped together, and the cover and the clamp shell surround the through hole and the pivot hole, the pivot is rotatably inserted through the pivot hole, and the first end of the fastening piece is fixed to the base.

[0023] The clamp provided by this utility model has at least the following beneficial effects:

[0024] The clamp includes a housing, a gear, a fastening plate, and a locking element. The housing has a through hole, within which the gear is rotatably connected via a shaft. The fastening plate has several toothed slots evenly spaced along its length. One end of the fastening plate is fixed to the housing, and the other end passes through the through hole. The gear and the toothed slots are always meshed, and gear rotation tightens or loosens the fastening plate. The locking element is movably connected to the housing, allowing it to insert into or retract from the gear's toothed slots. When the locking element is inserted, it restricts gear rotation in a first direction but allows rotation in a second direction (opposite directions). When the gear rotates in the first direction, the fastening plate loosens; when the gear rotates in the second direction, the fastening plate tightens. When tightening the clamp, the locking element does not need to be removed from its slot; simply rotating the gear in the second direction drives the locking element out of its slot, simplifying operation and increasing efficiency. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the clamp structure in an embodiment of this utility model;

[0026] Figure 2 for Figure 1 Enlarged view at point A in the middle;

[0027] Figure 3 This is an exploded view of the clamp in an embodiment of this utility model;

[0028] Figure 4 This is a cross-sectional view of the clamp in an embodiment of this utility model;

[0029] Figure 5 This is a first cross-sectional view of a partial structure of the clamp in an embodiment of the present utility model;

[0030] Figure 6 This is a second sectional view of a partial structure of the clamp in an embodiment of this utility model;

[0031] Figure 7 This is an exploded view of a portion of the clamp structure in an embodiment of this utility model;

[0032] Figure 8 This is a partial structural diagram of the clamp in an embodiment of the present utility model.

[0033] In the picture:

[0034] 1. Hoop shell; 11. Through hole; 12. Base; 121. Base plate; 1211. Second snap-fit ​​piece; 122. Side plate of the base; 1221. First snap-fit ​​hole; 13. Cover; 131. Top plate; 1311. Outer side; 1312. Through hole; 132. Side plate of the cover; 1321. First snap-fit ​​piece; 14. Rotary shaft hole;

[0035] 2. Gear; 21. Tooth groove;

[0036] 3. Fastening plate; 31. Toothed groove; 32. Second slot;

[0037] 4. Locking element; 41. Rotating shaft; 411. Slot; 42. Locking protrusion; 421. Third limiting surface; 422. Third guide surface;

[0038] 5. Elastic components;

[0039] 6. Knob; 61. First limiting surface; 62. First guide surface; 63. Second limiting surface; 64. Insert block;

[0040] 7. Support block; 71. Support surface; 72. Second guide surface;

[0041] 81. Rotating shaft; 82. Limiting component; 83. Connecting component; 831. Insertion slot. Detailed Implementation

[0042] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0043] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. The terms "first position" and "second position" refer to two different positions. Moreover, "above," "on top of," and "over" the first feature in relation to the second feature includes the first feature directly above and diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "under," and "below" the first feature in relation to the second feature includes the first feature directly below and diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0044] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0045] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0046] In the existing clamp technology, when the operator tightens the clamp, the operator needs to first separate the fixing block from the gear before the gear can be turned. After the clamp is tightened to the appropriate degree, the operator needs to keep the gear position unchanged and operate the fixing block to lock the gear position. Therefore, when using this clamp, the operator needs to frequently switch between operating objects between the gear and the fixing block, which is inconvenient and inefficient.

[0047] To address this issue, this embodiment provides a clamp to connect two pipe fittings, specifically for connecting the corrugated pipe and the exhaust port of a range hood. Please refer to... Figures 1 to 5 The clamp includes a clamp housing 1, a gear 2, a fastening plate 3, and a locking element 4. The clamp housing 1 has a through hole 11. The gear 2 is located within the through hole 11 and is rotatably connected to the clamp housing 1 via a rotating shaft 41. The fastening plate 3 has several toothed grooves 31, which are evenly spaced along the length of the fastening plate 3. The first end of the fastening plate 3 is fixed to the clamp housing 1, and the second end of the fastening plate 3 passes through the through hole 11. The gear 2 and the toothed grooves 31 are always meshed, and the rotation of the gear 2 can tighten or loosen the fastening plate 3. The locking element 4 is movably connected to the clamp housing 1 so that the locking element 4 can insert into or retract from the toothed grooves 21 of the gear 2. When the locking element 4 is inserted into the toothed groove 21, the locking element 4 is configured to restrict the rotation of the gear 2 in a first direction (e.g., ...). Figure 2 (in the direction indicated by the middle arrow oa) and allow gear 2 to move in the second direction (such as... Figure 2Rotating in the opposite direction (as indicated by the arrow oa), the first and second directions are opposite. When gear 2 rotates in the first direction, fastening plate 3 is loosened; when gear 2 rotates in the second direction, fastening plate 3 is tightened. Specifically, locking member 4 can move relative to hoop 1 to have a locked position and an unlocked position. When locking member 4 is in the locked position, locking member 4 is inserted into tooth groove 21, and locking member 4 restricts gear 2 from rotating in the first direction and allows gear 2 to rotate in the second direction; when locking member 4 is in the unlocked position, locking member 4 exits tooth groove 21 to release the lock on gear 2. At this time, gear 2 can be freely rotated in the first or second direction. The clamp provided in this embodiment does not require locking member 4 to exit slot 411 when it is necessary to tighten the clamp. Simply rotating gear 2 in the second direction can drive locking member 4 to exit slot 411, which is simple to operate and has high operating efficiency.

[0048] It should be noted that the spacing between any two adjacent toothed slots 31 on the fastening plate 3 matches the tooth spacing between two adjacent teeth of the gear 2. Thus, when the gear 2 rotates, just like the gear 2 and rack structure, it can drive the fastening plate 3 to move relative to the hoop 1, thereby tightening or loosening the fastening plate 3.

[0049] Alternatively, please refer to Figures 3 to 6 The clamp also includes an elastic element 5, which is connected between the clamp housing 1 and the locking element 4. The elastic element 5 is configured to ensure that the locking element 4 always tends to insert into the tooth groove 21. With this configuration, during the process of rotating the gear 2 in the second direction and tightening the clamp, when the teeth of the gear 2 contact the locking element 4, the teeth of the gear 2 can push the locking element 4 and overcome the elastic force of the elastic element 5, causing the locking element 4 to move towards the unlocked position, so that the locking element 4 exits the tooth groove 21. After the teeth of the gear 2 have rotated, when the tooth groove 21 of the gear 2 is opposite to the locking element 4, under the action of the elastic force of the elastic element 5, the locking element 4 can be driven to move to the locking position and re-insert into the tooth groove 21. Even if the operator releases the gear 2 at this time, the fastening plate 3 will not loosen. This is suitable for the operator to apply force intermittently during the tightening process, and is suitable for applications where space is limited and only a portion of the gear 2 can be turned at a single angle.

[0050] Alternatively, please refer to Figures 3 to 8 In this embodiment, the locking member 4 can be positioned relative to the hoop 1 around a predetermined center line (e.g., Figure 4The locking member 4 can rotate (in the direction indicated by the arrow mn) and slide relative to the hoop 1 along a set center line. The locking member 4 can be moved between an unlocked position and a locked position by sliding it. The hoop also includes a knob 6, which is connected to the locking member 4 and located outside the hoop 1. Specifically, the hoop 1 has a through hole 1312 communicating with the through hole 11. One end of the locking member 4 passes through the through hole 11 through the through hole 11 and is connected to the locking member 4 via the through hole 1312. The clamp also includes a support block 7, which protrudes from the outer surface 1311 of the clamp housing 1. The support block 7 has a support surface 71 parallel to the outer surface 1311, and the support surface 71 is away from the gear 2 relative to the outer surface 1311. The knob 6 has a first limiting surface 61 perpendicular to the setting center line. The first limiting surface 61 can abut against the outer surface 1311 or against the support surface 71. When the first limiting surface 61 abuts against the outer surface 1311, the locking member 4 is inserted into the tooth groove 21; when the first limiting surface 61 abuts against the support surface 71, the locking member 4 is disengaged from the tooth groove 21. Specifically, when the locking member 4 is in the locked position, the first limiting surface 61 abuts against the outer surface 1311, and the locking member 4 locks the gear 2 in one direction; when the locking member 4 is in the unlocked position, the locking member 4 releases the lock on the gear 2. With this configuration, the locking element 4 can be moved between the locked and unlocked positions by operating the knob 6, so that the locking element 4 can lock or unlock the gear 2 in one direction.

[0051] It should be noted that since the sliding direction of the locking member 4 relative to the hoop 1 is consistent with the direction of the set center line and perpendicular to the support surface 71, when the knob 6 moves to the unlock position, the knob 6 can be stably supported on the support block 7, so that the locking member 4 can be stably kept in the unlock position, which facilitates the free rotation of the gear 2.

[0052] In other embodiments, the locking member 4 may also be configured as a ratchet, which is rotatably disposed on the hoop 1. When the locking member 4 is in the locked position, the ratchet can be inserted into the tooth groove 21 of the gear 2, and the ratchet can restrict the gear 2 from rotating in the first direction and allow the gear 2 to rotate in the second direction; when the locking member 4 is in the unlocked position, the ratchet exits the tooth groove 21.

[0053] When it is necessary to move the locking member 4 from the locked position to the unlocked position, the knob 6 can be pulled up along the set center line until the first limiting surface 61 is flush with or slightly higher than the support surface 71. Then, the knob 6 can be rotated until the first limiting surface 61 of the knob 6 abuts against the support surface 71, thus moving the locking member 4 to the unlocked position. However, this operation requires pulling the knob 6 first and then rotating it, which is inconvenient.

[0054] For this, please refer to Figure 5 and Figure 6In this embodiment, the knob 6 also has a first guide surface 62 connected to the first limiting surface 61, and the first guide surface 62 is set at an angle to the set center line; the support block 7 has a second guide surface 72 connected between the support surface 71 and the outer surface 1311, and the first guide surface 62 and the second guide surface 72 are slidably fitted together. When the first limiting surface 61 abuts against the outer surface 1311 and rotates counterclockwise around the set center line (e.g. Figure 5 Zhongyu Figure 6 When knob 6 is rotated (in the direction indicated by the middle arrow ob), the first guide surface 62 can slide along the second guide surface 72. Since the first guide surface 62 is set at an angle to the set center line, the first guide surface 62 can decompose the force received into a component force along the set center line, thereby guiding the locking member 4 to gradually exit the tooth groove 21 along the set center line. Therefore, simply rotating knob 6 counterclockwise along the set center line allows the locking member 4 to smoothly move from the locked position to the unlocked position, making operation convenient. Both the first guide surface 62 and the second guide surface 72 can be configured as inclined surfaces, arc surfaces, or spiral curved surfaces.

[0055] Optionally, when the first limiting surface 61 abuts against the outer surface 1311, the depth to which the locking member 4 is inserted into the tooth groove 21 is less than the distance between the first limiting surface 61 and the supporting surface 71. With this configuration, when the locking member 4 is in the locked position, rotating the gear 2 in the second direction allows the locking member 4 to float along the set center line under the combined action of the teeth of the gear 2 and the elasticity. The maximum amount of floating is equal to the depth to which the locking member 4 is inserted into the tooth groove 21 when it is in the locked position. Since the depth to which the locking member 4 is inserted into the tooth groove 21 is less than the distance between the first limiting surface 61 and the supporting surface 71, the first limiting surface 61 of the knob 6 remains below the supporting surface 71 during the floating process of the locking member 4. This prevents the locking member 4 from being fixed in the unlocked position and ensures that after each tooth passes over the locking member 4, the locking member 4 can be re-inserted into the next tooth groove 21 under the drive of the elastic member 5, thus preventing the fastening piece 3 from loosening.

[0056] Alternatively, please refer to Figure 5 and Figure 6 The knob 6 also has a second limiting surface 63 arranged parallel to the setting center line. When the first limiting surface 61 abuts against the outer surface 1311 and rotates clockwise around the setting center line (e.g., ...), Figure 5 Zhongyu Figure 6 When the knob 6 is rotated (in the opposite direction to the direction indicated by the middle arrow ob), the second limiting surface 63 can abut against the support block 7. This design ensures that the knob 6 can only be moved from the locked position to the unlocked position by rotating counterclockwise, thus preventing fooling.

[0057] Optionally, when the first limiting surface 61 abuts against the outer surface 1311 and the knob 6 is rotated counterclockwise around the set center line, the locking member 4 can drive the gear 2 to rotate a small angle in the second direction, specifically one tooth pitch of the gear 2. Then the locking member 4 exits from the tooth groove 21 of the gear 2. During this process, the fastening piece 3 is further tightened, so the operator needs to use a relatively large force to turn the knob 6. However, when the operator rotates the knob 6 clockwise around the set center line, since the second limiting surface 63 can abut against the support block 7, the knob 6 cannot be turned no matter how much force is used. It can be seen that it takes a large force to make the locking member 4 disengage from the locked position by rotating the knob 6, which can prevent the knob 6 from being accidentally touched and causing the locking member 4 to disengage from the tooth groove 21, thereby preventing the gear 2 from being unlocked.

[0058] Optionally, the clamp includes two support blocks 7, which are arranged opposite to each other on both sides of the through hole 1312. The knob 6 is provided with two first guide surfaces 62 corresponding to the two support blocks 7, and the two first guide surfaces 62 are symmetrically arranged about the set center line. When the knob 6 is rotated, the two first guide surfaces 62 slide relative to the two second guide surfaces 72 on the two support blocks 7, which can ensure the stability of the knob 6 during the turning process, and thus ensure that the knob 6 can maintain stability when driving the locking member 4 to move along the set center line.

[0059] Alternatively, please refer to Figure 3 , Figure 7 and Figure 8 One of the locking member 4 and the knob 6 is provided with a slot 411, and the other of the locking member 4 and the knob 6 is provided with a plug 64. The slot 411 and the plug 64 are inserted into each other and can limit the relative position of the knob 6 and the locking member 4 along a set center line. When the first limiting surface 61 is in contact with the outer surface 1311, the slot 411 extends out of the hoop 1. This configuration allows for a detachable connection between the locking member 4 and the knob 6, facilitating assembly and maintenance. In this embodiment, an exemplary scheme is provided where the locking member 4 is provided with a slot 411 and the knob 6 is provided with a plug 64. Specifically, during assembly, one end of the locking member 4 with the slot 411 can be passed through the through hole 11 through the through hole 1312 on the hoop 1, and then the plug 64 is inserted into the slot 411 to fix the relative position of the knob 6 and the locking member 4.

[0060] In this embodiment, the slot 411 is a T-shaped slot and the insert block 64 is a T-shaped block. In other embodiments, the slot 411 may also be an L-shaped slot, and the corresponding insert block 64 may be an L-shaped block; or the slot 411 may be a dovetail slot, and the corresponding insert block 64 may be a dovetail block.

[0061] Alternatively, please refer to Figure 3 , Figure 7 and Figure 8 The locking member 4 includes a rotating shaft 41 and a locking protrusion 42. The rotating shaft 41 is slidably connected to the hoop 1 and can rotate relative to the hoop 1 around a set center line. One end of the rotating shaft 41 passes through the through hole 1312 through the through hole 11 and is connected to the knob 6. The locking protrusion 42 is connected to the other end of the rotating shaft 41 and is used to insert or withdraw from the tooth groove 21. The locking protrusion 42 includes a third limiting surface 421 and a third guiding surface 422 arranged opposite to each other. The third limiting surface 421 is parallel to the set center line, and the third guiding surface 422 forms an angle with the set center line. When the first limiting surface 61 abuts against the outer surface 1311, the third limiting surface 421 can abut against the gear 2 rotating in the first direction to limit the position of the gear 2. The third guiding surface 422 can slide against the gear 2 rotating in the second direction and guide the locking member 4 to withdraw from the tooth groove 21 along the direction of the set center line. It is understandable that, since the third limiting surface 421 is perpendicular to the set center line, when the teeth of gear 2 contact the third limiting surface 421, they cannot push the locking protrusion 42 to move in the direction of the set center line, so that the locking member 4 can prevent gear 2 from rotating in the first direction when it is in the locked position. Since the third guide surface 422 is at an angle to the set center line, the third guide surface 422 can decompose the force from the teeth of gear 2 into a component force along the direction of the set center line, thereby pushing the locking protrusion 42 to gradually exit the tooth groove 21 along the direction of the set center line, thus allowing gear 2 to rotate in the second direction. Preferably, the elastic member 5 is a compression spring, and the elastic member 5 is sleeved on the rotating shaft 41 and located in the through hole 11. The two ends of the compression spring abut against the hoop 1 and the locking protrusion 42 respectively, and the compression spring is in a compressed state. In other embodiments, the elastic member 5 can also be a tension spring or a disc spring, etc.

[0062] Alternatively, please refer to Figure 3 The clamp also includes two limiting members 82 fixed at intervals on the rotating shaft 41. Both limiting members 82 are located outside the clamp housing 1, and both limiting members 82 can abut against the clamp housing 1 along the axial direction of the rotating shaft 41. Specifically, the clamp housing 1 is also provided with a rotating shaft hole 14 communicating with the through hole 11. The rotating shaft 41 passes through the rotating shaft hole 14. The outer diameter of both limiting members 82 is larger than the inner diameter of the rotating shaft hole 14. Both limiting members 82 can abut against the clamp housing 1 and can rotate relative to the clamp housing 1. The two limiting members 82 can restrict the position of the gear 2 along the axial direction of the rotating shaft 41 to ensure that the gear 2 and the toothed groove 31 on the fastening plate 3 can mesh stably.

[0063] Alternatively, please refer to Figure 3The clamp also includes a connector 83 coaxially and fixedly connected to the rotating shaft 41. The connector 83 is used to connect a torque wrench, and the torque wrench drives the gear 2 to rotate in a first direction or a second direction by rotating the connector 83. The connector 83 may be provided with a insertion groove 831, through which the torque wrench is inserted and engaged. The insertion groove 831 can be a slotted groove for engagement with a slotted torque wrench, a star-shaped groove for engagement with a star-shaped torque wrench, a cross-shaped groove for engagement with a cross-shaped torque wrench, or an internal hexagonal groove for engagement with an internal hexagonal torque wrench, etc. The torque wrench can be an electric torque wrench or a manual torque wrench. In other embodiments, the insertion groove 831 can also be replaced by an insertion protrusion.

[0064] Optionally, the gear 2, the shaft 41, the two limiting parts 82 and the connecting parts 83 are integrally formed, which can effectively reduce the number of parts and facilitate the improvement of the assembly efficiency of the clamp.

[0065] Alternatively, please refer to Figure 2 and Figure 3 The hoop 1 includes a base 12 and a cover 13. The cover 13 and the base 12 are snapped together, and the cover 13 and the hoop 1 form a through hole 11 and a pivot hole 14. The pivot 41 is rotatably inserted through the pivot hole 14, and the first end of the fastening piece 3 is fixed to the base 12. This arrangement facilitates the assembly of the hoop.

[0066] Specifically, in this embodiment, both the cover 13 and the base 12 are U-shaped. The cover 13 includes a top plate 131 and two cover side plates 132 connected to both sides of the top plate 131. The base 12 includes a bottom plate 121 and two seat side plates 122 connected to both sides of the bottom plate 121. The outer side 1311 is the top surface of the top plate 131, and the support block 7 and the through hole 1312 are both provided on the top plate 131. The first end of the fastening piece 3 is fixed to the bottom plate 121. Both cover side plates 132 are provided with semi-circular holes, and both seat side plates 122 are provided with U-shaped holes. The cover 13 and the base 12 are interlocked and form a through hole 11. The two seat side plates 122 and the two cover side plates 132 are interlocked along the interlocking direction of the cover 13 and the base 12 to form a through hole 11. Each U-shaped hole and the semi-circular hole are interlocked along the interlocking direction to form a pivot hole 14.

[0067] Furthermore, both cover side plates 132 are provided with a plurality of bendable first snap-fit ​​pieces 1321, and both base side plates 122 are provided with a plurality of first snap holes 1221. The plurality of first snap-fit ​​pieces 1321 are provided in a one-to-one correspondence with the plurality of first snap holes 1221, and the first snap-fit ​​pieces 1321 pass through the first snap holes 1221 and are flattened to stably connect the cover 13 and the base 12 together. In other embodiments, the first snap-fit ​​pieces 1321 may also be provided on the base side plate 122, and the first snap holes 1221 may be provided on the cover side plate 132 accordingly.

[0068] Optionally, the base plate 121 is also provided with a plurality of second snap-fit ​​pieces 1211, and the first end of the fastening piece 3 is provided with a plurality of second snap-fit ​​slots 32. The plurality of first snap-fit ​​pieces 1321 pass through the plurality of second snap-fit ​​slots 32 one by one and press against the screen to fix the first end of the fastening piece 3 and the base plate 121 of the base 12 together.

[0069] Alternatively, please refer to Figure 4 The width of the fastening plate 3 is adapted to the width of the through hole 11 so that when the gear 2 drives the fastening plate 3 to move in the through hole 11, the movement direction of the fastening plate 3 can remain stable.

[0070] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A clamp, comprising a clamp housing (1), a gear (2), and a fastening plate (3), wherein the clamp housing (1) has a through hole (11), the gear (2) is located in the through hole (11) and is rotatably connected to the clamp housing (1) via a rotating shaft (41), the fastening plate (3) has a plurality of toothed grooves (31), the plurality of toothed grooves (31) are arranged at equal intervals along the length direction of the fastening plate (3), the first end of the fastening plate (3) is fixed to the clamp housing (1), the second end of the fastening plate (3) passes through the through hole (11), the gear (2) and the toothed grooves (31) are always meshed, and the rotation of the gear (2) can drive the fastening plate (3) to tighten or loosen, characterized in that, The clamp also includes a locking element (4); The locking member (4) is movably connected to the hoop (1) so that the locking member (4) can be inserted into or removed from the tooth groove (21) of the gear (2). When the locking member (4) is inserted into the tooth groove (21), the locking member (4) is configured to restrict the gear (2) from rotating in a first direction and allow the gear (2) to rotate in a second direction, the first direction and the second direction being opposite. When the gear (2) rotates in the first direction, the fastening plate (3) is released, and when the gear (2) rotates in the second direction, the fastening plate (3) is tightened.

2. The clamp according to claim 1, characterized in that, The clamp also includes an elastic element (5) connected between the clamp housing (1) and the locking element (4), the elastic element (5) being configured to ensure that the locking element (4) always tends to insert into the tooth groove (21).

3. The clamp according to claim 2, characterized in that, The locking member (4) is rotatable relative to the hoop (1) about a set center line, and the locking member (4) is slidable relative to the hoop (1) along the set center line. The clamp also includes: A knob (6) is connected to the locking member (4) and located outside the hoop (1). The knob (6) has a first limiting surface (61) perpendicular to the set center line. A support block (7) protrudes from the outer side (1311) of the hoop (1). The support block (7) has a support surface (71) parallel to the outer side (1311). The support surface (71) is away from the gear (2) relative to the outer side (1311). The first limiting surface (61) can abut against the outer side (1311) or against the support surface (71). When the first limiting surface (61) abuts against the outer side (1311), the locking member (4) is inserted into the tooth groove (21). When the first limiting surface (61) abuts against the support surface (71), the locking member (4) is withdrawn from the tooth groove (21).

4. The clamp according to claim 3, characterized in that, The knob (6) also has a first guide surface (62) connected to the first limiting surface (61), and the first guide surface (62) is set at an angle to the set center line; The support block (7) has a second guide surface (72) connecting the support surface (71) and the outer side surface (1311). The first guide surface (62) and the second guide surface (72) are slidably attached. When the first limiting surface (61) abuts against the outer side surface (1311) and the knob (6) is rotated counterclockwise around the set center line, the first guide surface (62) can slide along the second guide surface (72) and guide the locking member (4) to gradually exit the tooth groove (21) along the direction of the set center line.

5. The clamp according to claim 4, characterized in that, The knob (6) also has a second limiting surface (63) arranged parallel to the set center line. When the first limiting surface (61) abuts against the outer surface (1311) and the knob (6) is rotated clockwise around the set center line, the second limiting surface (63) can abut against the support block (7) to limit the position of the knob (6); and / or, When the first limiting surface (61) abuts against the outer surface (1311) and the knob (6) is rotated counterclockwise around the set center line, the locking member (4) can drive the gear (2) to rotate in the second direction.

6. The clamp according to claim 3, characterized in that, One of the locking member (4) and the knob (6) is provided with a slot (411), and the other of the locking member (4) and the knob (6) is provided with a plug (64). The slot (411) and the plug (64) are inserted and can limit the relative position of the knob (6) and the locking member (4) along the set center line direction. When the first limiting surface (61) is in contact with the outer surface (1311), the slot (411) extends out of the hoop (1).

7. The clamp according to claim 3, characterized in that, The locking element (4) includes: A rotating shaft (41) is slidably connected to the hoop (1) and can rotate relative to the hoop (1) around the set center line. One end of the rotating shaft (41) is connected to the knob (6). A locking protrusion (42) is connected to the other end of the rotating shaft (41) and is used to insert into or withdraw from the tooth groove (21). The locking protrusion (42) includes a third limiting surface (421) and a third guiding surface (422) arranged opposite to each other. The third limiting surface (421) is parallel to the set center line, and the third guiding surface (422) forms an angle with the set center line. When the first limiting surface (61) abuts against the outer side surface (1311), the third limiting surface (421) can abut against the gear (2) rotating in the first direction to limit the position of the gear (2). The third guiding surface (422) can slide against the gear (2) rotating in the second direction and guide the locking member (4) to withdraw from the tooth groove (21) in the direction of the set center line.

8. The clamp according to claim 3, characterized in that, When the first limiting surface (61) abuts against the outer surface (1311), the depth to which the locking member (4) is inserted into the tooth groove (21) is less than the distance between the first limiting surface (61) and the supporting surface (71).

9. The clamp according to any one of claims 1-8, characterized in that, The clamp also includes two limiting members (82) fixed at intervals on the rotating shaft (41), both limiting members (82) being located outside the clamp shell (1), and both limiting members (82) being able to abut against the clamp shell (1) along the axial direction of the rotating shaft (41); and / or, The clamp also includes a connector (83) that is coaxial with and fixedly connected to the rotating shaft (41), and the connector (83) is used to connect a torque wrench.

10. The clamp according to any one of claims 1-8, characterized in that, The hoop (1) includes a base (12) and a cover (13). The cover (13) and the base (12) are snapped together, and the cover (13) and the hoop (1) surround the through hole (11) and the pivot hole (14). The pivot (41) is rotatably inserted through the pivot hole (14), and the first end of the fastening piece (3) is fixed to the base (12).

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