Connecting pin shaft of anti-falling pin
By designing the clamping mechanism and locking assembly in the pin, and using the reset force of the torsion spring and spring to fix the insertion block and the limit block, the problem of loosening of the traditional pin shaft when rotating at high speed is solved, and a good connection is achieved Effect.
Patent Information
- Application Number
- CN202420728994.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-10
- Publication Date
- 2024-12-31
- Estimated Expiration
- 2034-04-10
AI Technical Summary
Traditional pins are easily loosened when rotating at high speed, resulting in the inability to rotate synchronously, and have poor stability and are unable to effectively clamp.
A connecting pin shaft that is not unpinned is designed, adopts a clamping mechanism that fixes the insert shaft and the housing, including connecting blocks, torsion springs, insert blocks, slots, limit blocks and positioning holes, through the clamp slots, fix blocks, and prevents The dust coil and locking assembly uses the resetting force of the torsion spring and spring to achieve the fixing of the insertion block and the limit block, ensuring that it does not loosen when rotating.
It realizes stable connection during high-speed rotation, avoids loosening, enhances the stability and clamping effect of the pin, and ensures the synchronous rotation and safety performance of the device.
Smart Images
Figure CN222277147U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of connecting pin shafts, in particular to a connecting pin shaft that is anti-dropping. Background Art
[0002] The pin is a type of standardized fastener that can be used for static fixed connection or relative movement with the connected parts. It is mainly used at the hinge of two parts to form a hinge connection. The pin is usually locked with a cotter pin. It works reliably and is easy to disassemble. The pin connection structure is the most commonly used force transmission structure in engineering. For example, in order to meet the needs of split transportation, the boom and turntable, mast and turntable of large-tonnage crawler cranes are all connected by pins.
[0003] After searching, the patent application number is (202223504512.0), which discloses "a pin shaft structure for preventing the pin from falling off", which solves the problem that the connection structure at the pin shaft is relatively simple and the connection is not tight enough. After long-term use, the pin shaft connection is easy to loosen, which not only affects the working efficiency of the device, but also affects its safety performance due to the loose pin shaft;
[0004] However, the above device has the following problems: the rotating connection is prone to loosening when the pin shaft rotates at high speed, resulting in the inability to rotate synchronously. In the process of supporting and fixing the traditional pin shaft and the driving structure, the stability is poor and the pin shaft cannot be clamped. For this reason, we propose a connecting pin shaft with an anti-pin loosening function to solve the above problem. Utility Model Content
[0005] The purpose of the utility model is to provide a connecting pin shaft with an anti-pin dropout function, so as to solve the problem proposed in the above-mentioned background technology that the rotating connection is easy to loosen when the pin shaft rotates at high speed, thereby resulting in the situation that synchronous rotation cannot be achieved, and the traditional pin shaft and the driving structure are poorly stabilized and cannot be clamped during the process of supporting and fixing.
[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a connecting pin shaft of an anti-drop pin, comprising a fixed plug shaft and a shell, a connecting mechanism is arranged at the bottom of the fixed plug shaft, a clamping mechanism is arranged on the inner side of the shell, the connecting mechanism comprises a connecting block, a torsion spring, an plug block, a slot, a limit block and a positioning hole, a connecting block is arranged at the bottom of the fixed plug shaft, a torsion spring is arranged inside the connecting block, an plug block is arranged on the surface of the torsion spring, a slot is arranged on the outer side of the plug block, a limit block is arranged at the bottom of the plug block, and positioning holes are arranged on both sides of the limit block.
[0007] Preferably, the card connection mechanism includes four groups of card slots opened inside the shell, the inner walls of the card slots are fixedly connected to a fixed block, the surface of the shell is located at the lower side of the fixed block and a connecting groove is opened, the openings of the card slots are fixedly connected to dust rings, and two groups of locking components are arranged on the inner side of the card slots.
[0008] Preferably, the eight groups of connecting blocks are symmetrically installed in pairs on the lower side of the fixed plug shaft, the plug block is fixedly connected to the surface of the torsion spring and is rotatably connected to the connecting block through the torsion spring, a slot is movably sleeved on the surface of the torsion spring, one end of the slot is fixedly connected in the connecting block, and the other end of the slot is fixedly connected in the plug block, the forward end of the plug block is fixedly connected to a limiting block, and positioning holes are provided on both side surfaces of the limiting block.
[0009] Preferably, the locking assembly includes a movable groove, a limiting ring, a positioning rod and a spring. A movable groove is opened on the inner side of the slot, a limiting ring is movably connected in the movable groove, a positioning rod is fixedly connected to the outer side of the limiting ring, and a spring is arranged on the inner side of the limiting ring, and both ends of the spring are respectively against the movable groove and the limiting ring.
[0010] Preferably, the limiting block and the fixing block are right triangles, and teeth are equidistantly provided on the upper surface of the limiting block and the lower surface of the fixing block, and the two groups of teeth are matched.
[0011] Preferably, the end of the positioning rod is arc-shaped, and the diameter of the positioning rod is matched with the diameter of the positioning hole.
[0012] Preferably, the diameter of the slot is matched with the diameter of the connecting block and the limiting block, and a dustproof rubber pad matching the limiting block is fixedly connected to the inner wall of the dustproof ring.
[0013] Compared with the prior art, the beneficial effects of the utility model are:
[0014] 1. The utility model sets a clamping mechanism. When the fixed plug shaft and the housing are connected, the plug block is inserted into the slot, and the upper surface of the plug block fits tightly with the lower wall of the limit block, so that the pin shaft is limited. At this time, the installation and fixation are completed, and under the limiting and fixing action of the teeth, the surface will not get loose when rotating, thereby achieving the purpose of good stability.
[0015] 2. The utility model sets a locking assembly, and the plug block is reset by the elastic force of the torsion spring, so that the plug block pushes the positioning rods on both sides. When the plug block is completely in contact with the limit block, the positioning rod is inserted into the positioning hole under the rebound action of the spring to fix the plug block, thereby realizing convenient clamping between the plug block and the fixed block. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
[0017] Figure 1 It is a schematic diagram of the structure of the utility model;
[0018] Figure 2 It is a schematic diagram of the structural disassembly of the utility model;
[0019] Figure 3 It is a structural schematic diagram of the clamping mechanism of the utility model;
[0020] Figure 4 It is a structural schematic diagram of the connection mechanism of the utility model;
[0021] Figure 5 It is a structural schematic diagram of the locking component of the utility model.
[0022] In the figure: 1. fixed plug shaft; 2. housing; 3. connecting mechanism; 301. connecting block; 302. torsion spring; 303. plug block; 304. slot; 305. limit block; 306. positioning hole; 4. snap-on mechanism; 401. slot; 402. fixed block; 403. connecting slot; 404. dust ring; 5. locking assembly; 501. movable slot; 502. limit ring; 503. positioning rod; 504. spring. DETAILED DESCRIPTION
[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0024] See also Figure 1-5, the utility model provides an embodiment: a connecting pin shaft of an anti-dropping pin, comprising a fixed plug shaft 1 and a shell 2, a connecting mechanism 3 is arranged at the bottom of the fixed plug shaft 1, a clamping mechanism 4 is arranged on the inner side of the shell 2, the connecting mechanism 3 comprises a connecting block 301, a torsion spring 302, an insert block 303, a slot 304, a limit block 305 and a positioning hole 306, a connecting block 301 is arranged at the bottom of the fixed plug shaft 1, a torsion spring 302 is arranged inside the connecting block 301, an insert block 303 is arranged on the surface of the torsion spring 302, a slot 304 is arranged on the outer side of the insert block 303, a limit block 305 is arranged at the bottom of the insert block 303, and positioning holes 306 are arranged on both sides of the limit block 305;
[0025] The device solves the problem that the rotating connection is easily loosened when the pin shaft rotates at high speed, thereby preventing the synchronous rotation, and the traditional pin shaft and the driving structure from having poor stability and being unable to clamp the pin shaft during the support and fixation process.
[0026] Furthermore, the card connection mechanism 4 includes four groups of card slots 401 formed inside the housing 2, the inner wall of the card slots 401 is fixedly connected to a fixing block 402, a connecting slot 403 is formed on the surface of the housing 2 below the fixing block 402, dust rings 404 are fixedly connected to the openings of the card slots 401, and two groups of locking components 5 are arranged inside the card slots 401. Figure 3 As shown, the structure is used to cooperate with the limit block 305 on the fixed plug-in shaft 1 through the card slot 401 in the shell 2, and the fixed plug-in shaft 1 is inserted into the shell 2. The surface of the fixed block 402 will press the inclined surface of the limit block 305, so that the limit block 305 moves along the inclined surface of the fixed block 402 and fits tightly with the lower wall of the fixed block 402, thereby fixing the plug-in shaft 1 and the shell 2 for limiting. At this time, the installation and fixation are completed.
[0027] Furthermore, eight groups of connection blocks 301 are symmetrically installed in pairs on the lower side of the fixed plug shaft 1. The plug block 303 is fixedly connected to the surface of the torsion spring 302 and is rotatably connected to the connection block 301 through the torsion spring 302. The surface of the torsion spring 302 is movably sleeved with a slot 304. One end of the slot 304 is fixedly connected to the connection block 301, and the other end of the slot 304 is fixedly connected to the plug block 303. The end of the plug block 303 is fixedly connected to the limit block 305, and the two side surfaces of the limit block 305 are provided with positioning holes 306. Figure 4As shown, the structure is used to be inserted into the housing 2 through the fixed insertion shaft 1, and the limit block 305 will drive the slot 304 to rotate through the torsion spring 302, pulling the slot 304 to elastically stretch and increase the elasticity. After that, the limit block 305 will be disengaged from the inclined surface of the fixed block 402 after rotating a certain angle, and at the same time contact with the bottom of the fixed block 402. The limit block 305 is tightly fitted with the lower wall of the fixed block 402 under the elastic reset of the slot 304. The operation is simple and convenient, and it is easy to install and fix.
[0028] Furthermore, the locking assembly 5 includes a movable groove 501, a limiting ring 502, a positioning rod 503 and a spring 504. The movable groove 501 is provided inside the card slot 401, the limiting ring 502 is movably connected inside the movable groove 501, the positioning rod 503 is fixedly connected to the outside of the limiting ring 502, and the spring 504 is provided inside the limiting ring 502, and the two ends of the spring 504 are respectively against the movable groove 501 and the limiting ring 502. Figure 5 As shown, this structure is used for when the limit block 305 is inserted into the slot 401, the limit block 305 pushes the positioning rods 503 on both sides to drive the limit ring 502 to move inward, squeezes the spring 504 to deform the spring 504, and when the limit block 305 is completely inserted into the slot 401, under the rebound action of the spring 504, the positioning rod 503 is inserted into the positioning hole 306, fixes the limit block 305, and enhances stability.
[0029] Furthermore, the limit block 305 and the fixed block 402 are right triangles, and teeth are arranged equidistantly on the upper surface of the limit block 305 and the lower surface of the fixed block 402, and the two sets of teeth are matched. Figure 4 As shown, the structure is used to adapt the two sets of teeth so that the pin will not get loose when rotating, thereby achieving the purpose of good stability.
[0030] Furthermore, the end of the positioning rod 503 is arc-shaped, and the diameter of the positioning rod 503 is adapted to the diameter of the positioning hole 306. Figure 5 As shown, the structure is used to adapt to the positioning rod 503 through the positioning hole 306, so that the positioning rod 503 is inserted into the positioning hole 306, the limit block 305 is fixed, and the firmness of the device is enhanced.
[0031] Furthermore, the diameter of the slot 401 matches the diameter of the connecting block 301 and the limiting block 305, and a dustproof rubber pad matching the limiting block 305 is fixedly connected to the inner wall of the dustproof ring 404. Figure 3 As shown, this structure is used to discharge the gas in the card slot 401 during use when the limit block 305 is inserted into the card slot 401 at the fixed block 402 through the dustproof ring 404 and the dustproof rubber pad, thereby improving the sealing effect in the card slot 401 and ensuring the normal use of the device.
[0032] Working principle: When used, Figure 2 As shown, align the bottom of the fixed plug shaft 1 with the upper end of the housing 2, and insert the fixed plug shaft 1 into the housing 2, as shown in FIG. Figure 3 and Figure 4 As shown, the limit block 305 is inserted into the card slot 401, and the surface of the fixed block 402 will press the inclined surface of the limit block 305, so that the limit block 305 moves along the inclined surface of the fixed block 402, and the limit block 305 will drive the slot 304 to rotate through the torsion spring 302, pulling the slot 304 to elastically stretch, so that the elasticity increases, and then the limit block 305 will be separated from the inclined surface of the fixed block 402 after rotating a certain angle, and contact with the bottom of the fixed block 402, and the limit block 305 is tightly fitted with the lower wall of the fixed block 402 under the elastic reset of the slot 304. At the same time, as shown in FIG. Figure 4 and Figure 5 As shown, when the limit block 305 is inserted into the slot 401, the limit block 305 pushes the positioning rods 503 on both sides to drive the limit ring 502 to move inward, squeezing the spring 504 to deform the spring 504. When the limit block 305 is completely inserted into the slot 401, under the rebound action of the spring 504, the positioning rod 503 is inserted into the positioning hole 306 to fix the limit block 305. Under the limiting and fixing action of the teeth, loosening during rotation is avoided, thereby achieving the purpose of good stability. The above is the entire working principle of the utility model.
[0033] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.
Claims
1. A connecting pin shaft for preventing the pin from falling off, comprising a fixed plug shaft (1) and a housing (2), characterized in that: A connecting mechanism (3) is provided at the bottom of the fixed plug shaft (1), and a clamping mechanism (4) is provided on the inner side of the housing (2). The connecting mechanism (3) comprises a connecting block (301), a torsion spring (302), an insert block (303), a slot (304), a limit block (305) and a positioning hole (306). A connecting block (301) is provided at the bottom of the fixed plug shaft (1), a torsion spring (302) is provided inside the connecting block (301), an insert block (303) is provided on the surface of the torsion spring (302), a slot (304) is provided on the outer side of the insert block (303), a limit block (305) is provided at the bottom of the insert block (303), and positioning holes (306) are provided on both sides of the limit block (305).
2. The connecting pin shaft for preventing the pin from falling off according to claim 1, characterized in that: The clamping mechanism (4) comprises four groups of clamping slots (401) formed inside the housing (2), the inner walls of the clamping slots (401) being fixedly connected to fixing blocks (402), the surface of the housing (2) being provided with connecting slots (403) located below the fixing blocks (402), the openings of the clamping slots (401) being fixedly connected to dustproof rings (404), and two groups of locking components (5) being arranged inside the clamping slots (401).
3. The connecting pin shaft for preventing the pin from falling off according to claim 1, characterized in that: Eight groups of the connecting blocks (301) are symmetrically mounted in pairs on the lower side of the fixed plug shaft (1); the plug blocks (303) are fixedly connected on the surface of the torsion spring (302) and are rotatably connected to the connecting block (301) through the torsion spring (302); a slot (304) is movably sleeved on the surface of the torsion spring (302); one end of the slot (304) is fixedly connected in the connecting block (301); the other end of the slot (304) is fixedly connected in the plug block (303); the forward end of the plug block (303) is fixedly connected to a limit block (305); and positioning holes (306) are provided on both side surfaces of the limit block (305).
4. The connecting pin shaft for preventing the pin from falling off according to claim 2, characterized in that: The locking assembly (5) comprises a movable groove (501), a limiting ring (502), a positioning rod (503) and a spring (504); the movable groove (501) is provided on the inner side of the locking groove (401); the limiting ring (502) is movably connected inside the movable groove (501); the positioning rod (503) is fixedly connected to the outer side of the limiting ring (502); a spring (504) is provided on the inner side of the limiting ring (502); two ends of the spring (504) are respectively against the movable groove (501) and the limiting ring (502).
5. The connecting pin shaft for preventing the pin from falling off according to claim 1, characterized in that: The limiting block (305) and the fixing block (402) are right-angled triangles, and teeth are equidistantly arranged on the upper surface of the limiting block (305) and the lower surface of the fixing block (402), and the two groups of teeth are matched.
6. The connecting pin shaft for preventing the pin from falling off according to claim 4, characterized in that: The end of the positioning rod (503) is arc-shaped, and the diameter of the positioning rod (503) is matched to the diameter of the positioning hole (306).
7. The connecting pin shaft for preventing the pin from falling off according to claim 2, characterized in that: The diameter of the slot (401) is compatible with the diameters of the connecting block (301) and the limiting block (305), and a dustproof rubber pad matching the limiting block (305) is fixedly connected to the inner wall of the dustproof ring (404).