Quick-assembly and quick-disassembly fastening connection device

Abstract

The utility model discloses a fast assembly and disassembly fastening connection device, which belongs to the field of mechanical fastening devices, and comprises a cam handle, a connecting rod, a cushion block and a movable bolt, the cam handle comprises a handle part and an eccentric cam part, a first pin shaft is arranged in an eccentric shaft hole of the eccentric cam part, and the upper end of the connecting rod is rotatably connected with the first pin shaft; the cushion block is slidably arranged on the connecting rod in a sleeving mode, a U-shaped notch with a downward opening is formed in the lower end of the connecting rod, a second pin shaft is connected between the two side walls of the U-shaped notch, the size of the movable bolt in the length direction is larger than the outer diameter of the connecting rod, the movable bolt is pivoted into the U-shaped notch through the second pin shaft, and when the movable bolt is in a vertical storage state, the length direction is parallel to the axis of the connecting rod. In the transverse locking state, the length direction is perpendicular to the axis of the connecting rod, and the two ends extend out of the U-shaped notch to form an axial limiting structure. Auxiliary tools such as a wrench and a screwdriver are not needed, rapid assembly and disassembly can be achieved, the operation efficiency is greatly improved, the overall structure is simple, and the manufacturing cost is low.

Description

TECHNICAL FIELD

[0001] The utility model relates to mechanical fastening device technical field, concretely relates to a quick -mounting quick -disassembly fastening connecting device. BACKGROUND

[0002] In the field of mechanical connection and fixation, the demand of quick installation and disassembly (quick mounting and quick disassembly) device widely exists in the field of industrial equipment, mechanical processing, etc. In the scene of temporary assembly, equipment rapid deployment and high frequency disassembly, the traditional fastening technology (such as bolt nut, buckle, bolt, etc.) has significant deficiencies in convenience, stability and adaptability, such as: the traditional bolt nut fastening operation is low in efficiency, needs to rotate the bolt for multiple times during installation, needs to operate reversely during disassembly, is time-consuming and laborious, and needs to be used with wrench, screwdriver and other tools, and is low in efficiency in frequent disassembly scene;Buckle relies on elastic deformation to realize locking, and the structural strength is insufficient, and is prone to fatigue fracture after long-term use;Bolt only provides radial constraint, and cannot generate axial compression force. SUMMARY

[0003] In view of the problems existing in the prior art, the utility model provides a quick -mounting quick -disassembly fastening connecting device without tool, convenient operation and strong adaptability.

[0004] The technical scheme adopted by the utility model is as follows: a quick -mounting quick -disassembly fastening connecting device, including cam handle, connecting rod, cushion block, movable bolt, the cam handle includes handle part and eccentric cam part at one end of handle part, the eccentric cam part is provided with first pin shaft in eccentric shaft hole, the connecting rod upper end is rotatably connected with first pin shaft, the cushion block is slidably sleeved on the connecting rod and located below the eccentric cam part, the lower end of connecting rod is provided with U-shaped notch with opening downward, and the second pin shaft is connected between the two side walls of U-shaped notch, the movable bolt is long strip shape rigid member, the length direction size is greater than the outer diameter of connecting rod, the movable bolt is pivoted in U-shaped notch through second pin shaft, and the switching of vertical embedding state and horizontal locking state is realized by rotating, the length direction of movable bolt is parallel to connecting rod axis in vertical storage state, the length direction of movable bolt is perpendicular to connecting rod axis in horizontal locking state, and the both ends extend out of U-shaped notch to form axial limiting structure.

[0005] Further, the working surface of the eccentric cam part and the upper surface of the cushion block form a sliding contact surface, when the handle part rotates around the first pin shaft, the protruding part of the eccentric cam part presses the cushion block to generate axial compression force.

[0006] Further, when the movable bolt is in the horizontal locking state, the upper surfaces of the both ends thereof form surface contact constraint with the lower surface of the workpiece.

[0007] Further, the movable bolt is provided with a strip-shaped through groove extending along the length direction, and the second pin shaft passes through the strip-shaped through groove to form a relative sliding fit with the movable bolt.

[0008] Further, the center of the strip-shaped through groove is deviated from one end of the length direction of the movable bolt, so that when the second pin shaft is located at the proximal end of the strip-shaped through groove, the distance between the second pin shaft axis and the corresponding end surface of the movable bolt is less than or equal to the distance between the second pin shaft axis and the top wall of the U-shaped notch, and when the second pin shaft is located at the distal end of the strip-shaped through groove, the distance between the second pin shaft axis and the corresponding end surface of the movable bolt is greater than the distance between the second pin shaft axis and the top wall of the U-shaped notch.

[0009] Further, the end of the movable bolt is provided with a chamfer structure.

[0010] Further, the pad is a ring-shaped piece.

[0011] Further, the inner width of the U-shaped notch is in clearance fit with the width of the movable bolt.

[0012] Further, the connecting rod comprises a screw rod and a connecting sleeve, the U-shaped notch is arranged at the lower part of the connecting sleeve, the upper part of the connecting sleeve is provided with an internal thread hole, the lower part of the screw rod is in threaded connection with the internal thread hole of the connecting sleeve to form an axial length adjustable structure, and the upper end of the screw rod is provided with a shaft sleeve part which is rotatably sleeved on the first pin shaft.

[0013] The utility model discloses the vertical-horizontal switching and cam pressing of movable bolt realize " one pull one turn one press " three steps complete fast assembly and disassembly, do not need wrench, screwdriver and other auxiliary tools, and the operation efficiency is greatly improved. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is the overall structure schematic diagram when the utility model discloses the transverse locking state.

[0015] Figure 2 It is the utility model discloses the explosion map.

[0016] Figure 3 It is the overall structure schematic diagram when the utility model discloses the vertical storage state.

[0017] Figure 4 It is the use state schematic diagram of the utility model.

[0018] In the figure: cam handle 100, handle part 101, eccentric cam part 102, first pin shaft 103, cushion block 200, connecting rod 300, screw rod 301, connecting sleeve 302, U-shaped notch 303, second pin shaft 304, movable bolt 400, strip-shaped through slot 401. DETAILED DESCRIPTION

[0019] In order to facilitate the understanding of the present application, the following will be combined with the description, drawings and preferred embodiments to make a more comprehensive and detailed description of the present application, but the protection scope of the present application is not limited to the following specific embodiments.

[0020] As shown in Figure 1 , Figure 2 , the present embodiment provides a quick-mounting and quick-releasing fastening connection device, which comprises a cam handle 100, a connecting rod 300, a cushion block 200 and a movable bolt 400. The cam handle 100 comprises a handle part 101 and an eccentric cam part 102 located at one end of the handle part 101, and a first pin shaft 103 is arranged in the eccentric shaft hole of the eccentric cam part 102. The upper end of the connecting rod 300 is rotationally connected with the first pin shaft 103. The cushion block 200 is slidably sleeved on the connecting rod 300 and located below the eccentric cam part 102. The lower end of the connecting rod 300 is provided with a U-shaped notch 303 with an opening facing downward, and a second pin shaft 304 is connected between the two side walls of the U-shaped notch 303. The movable bolt 400 is a long strip-shaped rigid member, and the length direction size thereof is greater than the outer diameter of the connecting rod 300. The movable bolt 400 is pivotally connected in the U-shaped notch 303 through the second pin shaft 304, and the vertical penetrating state and the horizontal locking state are switched by rotation. When the movable bolt 400 is in the vertical storage state, the length direction of the movable bolt 400 is parallel to the axis of the connecting rod 300 (see Figure 3 ), and when the movable bolt 400 is in the horizontal locking state, the length direction of the movable bolt 400 is perpendicular to the axis of the connecting rod 300, and the two ends thereof extend out of the U-shaped notch 303 to form an axial limiting structure (see Figure 1 , Figure 4 ).

[0021] In the present embodiment, the cushion block 200 is a ring-shaped member. During use, the cushion block 200 and the movable bolt 400 are respectively located on the upper surface and the lower surface of the two workpieces to be fixed, and the working curved surface of the eccentric cam part 102 forms a sliding contact surface with the upper surface of the cushion block 200. When the handle part 101 is rotated around the first pin shaft 103, the protruding part of the eccentric cam part 102 presses the cushion block 200 to generate an axial pressing force.

[0022] As a preferred scheme, when the movable bolt 400 is in the horizontal locking state, the upper surfaces of the two end portions thereof form a surface contact constraint with the lower surface of the workpiece, thereby improving the stability during fixing.

[0023] In order to conveniently switch the posture of the movable bolt 400, a strip-shaped through groove 401 extending along the length direction is arranged in the middle of the movable bolt 400, and the second pin shaft 304 passes through the strip-shaped through groove 401 and forms a relative sliding fit with the movable bolt 400.

[0024] Further, the center of the strip-shaped through groove 401 is deviated to one end of the length direction of the movable bolt 400, so that when the second pin shaft 304 is located at the proximal end of the strip-shaped through groove 401, the distance between the axis of the second pin shaft 304 and the corresponding end surface of the movable bolt 400 is less than or equal to the distance between the axis of the second pin shaft 304 and the top wall of the U-shaped notch 303, and when the second pin shaft 304 is located at the distal end of the strip-shaped through groove 401, the distance between the axis of the second pin shaft 304 and the corresponding end surface of the movable bolt 400 is greater than the distance between the axis of the second pin shaft 304 and the top wall of the U-shaped notch 303.

[0025] In order to conveniently rotate the movable bolt 400 in the U-shaped notch 303, a chamfer structure is arranged at the end of the movable bolt 400. The inner width of the U-shaped notch 303 and the width of the movable bolt 400 form a gap fit.

[0026] In order to provide compatibility, the connecting rod 300 comprises two parts of a screw rod 301 and a connecting sleeve 302, the U-shaped notch 303 is arranged at the lower part of the connecting sleeve 302, the upper part of the connecting sleeve 302 is provided with an internal thread hole, the lower part of the screw rod 301 is threadedly connected with the internal thread hole of the connecting sleeve 302 to form an axial length adjustable structure, and the upper end of the screw rod 301 is provided with a shaft sleeve part which is rotatably sleeved on the first pin shaft 103. Through the cooperation of the screw rod 301 and the connecting sleeve 302, the length of the connecting rod 300 can be adjusted, so as to adapt to workpieces with different thicknesses.

[0027] With the help of the teachings contained in the foregoing specification and associated drawings, those skilled in the art will appreciate modifications and other embodiments of the present application. Accordingly, the present application is not limited to the specific embodiments described in the specification, and modifications and other embodiments are considered to be within the scope of the appended claims. Although specific terms are employed herein, they are used only in the generic and descriptive sense and not for purposes of limitation.

Claims

1. A quick-installation and quick-release fastening connection device, characterized in that: Includes cam handle (100), connecting rod (300), pad (200), and movable bolt (400); The cam handle (100) includes a handle portion (101) and an eccentric cam portion (102) located at one end of the handle portion (101). A first pin (103) is provided in the eccentric shaft hole of the eccentric cam portion (102). The upper end of the connecting rod (300) is rotatably connected to the first pin (103); The pad (200) is slidably sleeved on the connecting rod (300) and located below the eccentric cam (102); The lower end of the connecting rod (300) is provided with a U-shaped groove (303) with the opening facing downward, and a second pin (304) is connected between the two side walls of the U-shaped groove (303). The movable bolt (400) is a long, rigid strip with a length dimension greater than the outer diameter of the connecting rod (300). The movable bolt (400) is pivotally connected to the U-shaped slot (303) via the second pin (304), and can switch between a vertical insertion state and a horizontal locking state by rotation. When the movable bolt (400) is in the vertical storage state, its length direction is parallel to the axis of the connecting rod (300). When the movable bolt (400) is in the horizontal locking state, its length direction is perpendicular to the axis of the connecting rod (300), and U-shaped slots (303) extend from both ends to form an axial limiting structure.

2. The quick-installation and quick-release fastening connection device as described in claim 1, characterized in that: The working surface of the eccentric cam (102) forms a sliding contact surface with the upper surface of the pad (200). When the handle (101) rotates around the first pin (103), the protrusion of the eccentric cam (102) presses against the pad (200) to generate an axial clamping force.

3. The quick-installation and quick-release fastening connection device as described in claim 1, characterized in that: When the movable bolt (400) is in the lateral locking state, the upper surfaces of its two ends form a surface contact constraint with the lower surface of the workpiece.

4. The quick-installation and quick-release fastening connection device as described in claim 1, characterized in that: The movable bolt (400) has a strip-shaped through groove (401) extending along the length direction in the middle. The second pin (304) passes through the strip-shaped through groove (401) and forms a relative sliding fit with the movable bolt (400).

5. The quick-installation and quick-release fastening connection device as described in claim 4, characterized in that: The center of the strip-shaped through groove (401) is biased towards one end of the movable bolt (400) along its length, such that when the second pin (304) is near the end of the strip-shaped through groove (401), the distance between the axis of the second pin (304) and the corresponding end face of the movable bolt (400) is less than or equal to the distance from the axis of the second pin (304) to the top wall of the U-shaped groove (303), and when the second pin (304) is far from the end of the strip-shaped through groove (401), the distance between the axis of the second pin (304) and the corresponding end face of the movable bolt (400) is greater than the distance from the axis of the second pin (304) to the top wall of the U-shaped groove (303).

6. The quick-installation and quick-release fastening connection device as described in claim 1, characterized in that: The end of the movable bolt (400) is provided with a chamfered structure.

7. The quick-installation and quick-release fastening connection device as described in claim 1, characterized in that: The pad (200) is an annular component.

8. The quick-installation and quick-release fastening connection device as described in claim 1, characterized in that: The inner width of the U-shaped groove (303) and the width of the movable bolt (400) form a clearance fit.

9. A quick-installation and quick-release fastening connection device as described in any one of claims 1-8, characterized in that: The connecting rod (300) includes two parts: a screw (301) and a connecting sleeve (302). The U-shaped groove (303) is opened at the lower part of the connecting sleeve (302). The upper part of the connecting sleeve (302) is provided with an internal threaded hole. The lower part of the screw (301) is threadedly connected to the internal threaded hole of the connecting sleeve (302) to form an axial length adjustable structure. The upper end of the screw (301) is provided with a bushing part, which is rotatably sleeved on the first pin (103).

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