Tension adjusting bolt

Abstract

The utility model relates to a tension adjusting bolt which comprises a connecting pipe sleeve, a cavity is formed in the connecting pipe sleeve, connecting screw rods are arranged at the two ends of the connecting pipe sleeve respectively, transmission gears are connected to the two ends of the connecting pipe sleeve respectively in a rotating mode, and the connecting screw rods penetrate through the transmission gears and are in threaded fit with the transmission gears. A driving rod is arranged between every two adjacent transmission gears, connecting supports are arranged at the two ends of each driving rod respectively, the two ends of each driving rod are rotationally connected to the connecting supports respectively, meshing parts and a driving part are arranged on each driving rod, the meshing parts are symmetrically arranged and meshed with the transmission gears on the two sides respectively, and the driving parts are used for driving the driving rods to rotate. And the transmission gears on the two sides are driven to rotate, so that the connecting screw rods on the two sides can move in the axial direction of the cavity at the same time. The tension adjusting device has the following advantages and effects that the connecting screw rods on the two sides are driven to move at the same time, so that the overall tension adjusting range is widened.

Description

Technical Field

[0001] The utility model relates to the technical field of bolts, in particular to a tension adjusting bolt. Background Art

[0002] In modern transportation, equipment fixation and other fields, tension rods are needed to limit and fix goods or equipment, and they have a wide range of application markets.

[0003] For example, a Chinese patent document with publication number CN217713225U discloses a bolt for realizing tension adjustment, including a connecting sleeve and an adjusting end, which is rotatably installed at one end of the connecting sleeve, and a threaded hole is provided at the central axis position of the adjusting end, and a connecting screw is connected to the internal thread of the threaded hole, and a limiting groove is respectively provided on the symmetrical side surfaces of the connecting screw, and a limiting convex strip is respectively provided on the symmetrical inner wall of the connecting sleeve, and one end of the connecting screw extends to the interior of the connecting sleeve, and the limiting convex strip is engaged in the interior of the limiting groove.

[0004] It can be seen from the above disclosed content that in the above technical solution, a rotating adjustment end is used to allow the connecting screw to telescopically move inside the connecting sleeve, thereby being able to flexibly adapt to the adjustment requirements of different pulling forces.

[0005] However, in the above technical solution, the tension is adjusted mainly by a connecting screw that can telescopically move inside the connecting sleeve at one side, so there are certain limitations on the range of tension adjustment. Summary of the invention

[0006] In view of the deficiencies in the prior art, the purpose of the utility model is to provide a tension adjustment bolt, which drives the connecting screws on both sides to move simultaneously to increase the overall tension adjustment range.

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a tension adjustment bolt, comprising a connecting sleeve, a cavity is provided in the connecting sleeve, connecting screws are respectively provided at both ends of the connecting sleeve, and transmission gears are rotatably connected at both ends of the connecting sleeve, the connecting screws pass through the transmission gears and form a threaded fit with the transmission gears, a driving rod is provided between adjacent transmission gears, connecting brackets are respectively provided at both ends of the driving rod, and the two ends of the driving rod are rotatably connected to the connecting brackets, an engaging portion and a driving portion are provided on the driving rod, the engaging portions are symmetrically arranged and respectively mesh with the transmission gears on both sides, and the driving portion is used to drive the driving rod to rotate, so as to drive the transmission gears on both sides to rotate, so that the connecting screws on both sides can move simultaneously along the axial direction of the cavity.

[0008] The utility model is further configured as follows: the connecting screw includes a moving part and a threaded part, the moving part is provided with a guide block, the inner wall of the connecting sleeve is provided with a guide groove opposite to the guide block, the guide groove is coupled to the guide block and constitutes a guiding fit between the two, the threaded part is provided with an external thread, the inner wall of the transmission gear is provided with an internal thread, the threaded part passes through the transmission gear and constitutes a threaded fit between the two.

[0009] The utility model is further configured as follows: a turning knob is provided on the driving part.

[0010] The utility model is further configured as follows: the turning knob is provided with a rotation groove which is recessed along the axial direction, and the cross section of the rotation groove is hexagonal.

[0011] The utility model is further configured as follows: a hook is welded on an end portion of the threaded portion at one side away from the connecting sleeve.

[0012] The utility model is further configured as follows: the connecting bracket comprises a first clamp and a second clamp, the first clamp is provided with a protruding connecting seat, and the end of the driving rod is rotatably connected to the connecting seat.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] By respectively arranging connecting brackets at both ends of the driving rod, the connecting brackets on both sides can provide installation space for the setting of the driving rod. When the tension of the bolt needs to be adjusted, the driving rod is driven to rotate, so that the transmission gears on both sides that are respectively engaged with the meshing parts on both sides can move toward or away from each other as the two-way transmission gear rotates. Therefore, adopting this structure, the connecting screws on both sides can be extended and retracted, thereby indirectly improving the overall tension adjustment range of the bolt. Therefore, it effectively solves the technical problem in the prior art that only one side of the connecting screw can be extended and retracted, resulting in a certain limitation in the tension adjustment range. In addition, by driving the connecting screws on both sides to extend and retract at the same time, the adjustment efficiency when adjusting the overall tension of the bolt can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0016] Figure 2 This is a schematic diagram of the explosion structure of the utility model;

[0017] Figure 3 It is a schematic diagram of the structure of the utility model from top view. DETAILED DESCRIPTION

[0018] 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.

[0019] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the 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", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0020] like Figures 1 to 3 As shown, the utility model discloses a tension adjustment bolt, which is characterized in that it includes a connecting sleeve 1, a cavity 101 is provided in the connecting sleeve 1, connecting screws 2 are respectively provided at both ends of the connecting sleeve 1, and transmission gears 3 are rotatably connected at both ends of the connecting sleeve 1, the connecting screw 2 passes through the transmission gear 3, and forms a threaded fit with the transmission gear 3. Its specific structure is that the connecting screw 2 includes a moving part 21 and a threaded part 22, the threaded part 22 is provided with an external thread, the inner wall of the transmission gear 3 is provided with an internal thread, the threaded part 22 passes through the transmission gear 3, and forms a threaded fit between the two;

[0021] In addition, a guide block 211 is provided on the moving part 21, and a guide groove 102 opposite to the guide block 211 is provided on the inner wall of the connecting sleeve. The guide groove 102 is coupled to the guide block 211 and forms a guide match between the two. A driving rod 4 is provided between adjacent transmission gears 3. Connecting brackets 5 are provided at both ends of the driving rod 4. Both ends of the driving rod 4 are rotatably connected to the connecting brackets 5. An engaging portion 41 and a driving portion 42 are provided on the driving rod 4. The engaging portions 41 are symmetrically arranged and respectively mesh with the transmission gears 3 on both sides. Therefore, after the driving portion 42 drives the driving rod 4 to rotate, the transmission gears 3 on both sides can be driven to rotate, so that the connecting screws 2 on both sides can be simultaneously moved along the axial direction of the cavity 101 under the guiding action of the guide groove 102 and the guide block 211. In addition, through the separately arranged moving part 21, the provided guide block 211 does not destroy the continuity of the external thread on the threaded part 22, thereby ensuring the stability of the threaded match between the threaded part 22 and the transmission gear 3.

[0022] By respectively arranging connecting brackets 5 at both ends of the driving rod 4, the connecting brackets 5 on both sides can provide installation space for the setting of the driving rod 4. When the tension of the bolt needs to be adjusted, the driving rod 4 is driven to rotate, so that the transmission gears 3 on both sides respectively meshing with the meshing parts 41 on both sides can move toward or away from each other as the two-way transmission gear 3 rotates. The specific principle is that the internal threads of the transmission gears 3 on both sides are set in opposite directions. Therefore, with this structure, the connecting screws 2 on both sides can be extended and retracted, thereby indirectly improving the overall tension adjustment range of the bolt, and by driving the connecting screws 2 on both sides to extend and retract at the same time, the adjustment efficiency when adjusting the overall tension of the bolt can be improved.

[0023] In this embodiment, a turning knob is further provided on the driving portion 42. The setting of the turning knob can facilitate the application of force, thereby facilitating the driving rod 4 to rotate, and a rotation groove 421 recessed along the axial direction is further provided on the turning knob. The cross-section of the rotation groove 421 is hexagonal. Through the setting of the rotation groove 421, a hexagonal wrench compatible with the rotation groove 421 can be used to turn the driving rod 4 for rotation, so as to further facilitate turning the driving rod 4 for rotation.

[0024] In this embodiment, a hook 6 is welded to the end of the threaded portion 22 which is located away from the connecting sleeve. Through the provision of the hook 6, the connecting screw 2 can be hooked at the connecting position of the workpiece.

[0025] In this embodiment, the specific structure of the connecting bracket 5 includes a first clamp 51 and a second clamp 52. Through the connection of the first clamp 51 and the second clamp 52, a detachable connection can be formed between the connecting bracket 5 and the connecting sleeve 1, thereby facilitating the installation of the driving rod 4. A protruding connecting seat 511 is provided on the first clamp 51, and the end of the driving rod 4 is rotatably connected to the connecting seat 511.

[0026] This specific embodiment is merely an explanation of the present invention and is not a limitation of the present invention. After reading this specification, those skilled in the art may make non-creative modifications to the present embodiment as needed, but such modifications are protected by patent law as long as they are within the scope of the claims of the present invention.

Claims

1. A tension adjustment bolt, characterized in that: It includes a connecting sleeve, a cavity is provided in the connecting sleeve, connecting screws are respectively provided at both ends of the connecting sleeve, and transmission gears are rotatably connected at both ends of the connecting sleeve. The connecting screws pass through the transmission gears and form a threaded fit with the transmission gears. A driving rod is provided between adjacent transmission gears, and connecting brackets are respectively provided at both ends of the driving rod. The two ends of the driving rod are respectively rotatably connected to the connecting brackets. An engaging part and a driving part are provided on the driving rod. The engaging parts are symmetrically arranged and respectively mesh with the transmission gears on both sides. The driving part is used to drive the driving rod to rotate, so as to drive the transmission gears on both sides to rotate, so that the connecting screws on both sides can move simultaneously along the axial direction of the cavity.

2. A tension adjustment bolt according to claim 1, characterized in that: The connecting screw includes a moving part and a threaded part, the moving part is provided with a guide block, the inner wall of the connecting sleeve is provided with a guide groove opposite to the guide block, the guide groove is coupled to the guide block and constitutes a guiding fit between the two, the threaded part is provided with an external thread, the inner wall of the transmission gear is provided with an internal thread, the threaded part passes through the transmission gear and constitutes a threaded fit between the two.

3. A tension adjustment bolt according to claim 1, characterized in that: The driving part is provided with a turning knob.

4. A tension adjustment bolt according to claim 3, characterized in that: The turning knob is provided with a rotation groove which is recessed along the axial direction, and the cross section of the rotation groove is hexagonal.

5. A tension adjustment bolt according to claim 2, characterized in that: A hook is welded on the end of the threaded portion at one side away from the connecting sleeve.

6. The tension adjustment bolt according to claim 1, characterized in that: The connecting bracket includes a first clamp and a second clamp. The first clamp is provided with a protruding connecting seat, and the end of the driving rod is rotatably connected to the connecting seat.

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