Power head coupling locking structure

Abstract

The utility model discloses a power head coupler locking structure, which relates to the technical field of power heads and comprises a power head, a shaft lever, a coupler, a screw and an elastic ring. The end part of the shaft rod is provided with a tooth head and an inner groove body; the inner groove body is sleeved with an elastic ring; the coupling is sleeved on the end portion of the shaft rod, a tooth groove matched with the tooth head and an outer groove body are arranged in the coupling, and the outer groove body corresponds to the inner groove body. The side of the coupler is in threaded connection with a screw, and a conical head at the end of the screw abuts against the notch. During assembly, the tooth head and the tooth groove are clamped to realize synchronous rotation; when the screw is screwed in, the conical head opens the notch to enable the elastic ring to expand to be clamped with the outer groove body, and the coupler is locked. When the screw is unscrewed, the elastic ring retracts to be separated from the outer groove body, and unlocking is achieved. The structure is reliable in locking and convenient to unlock, the stability and reliability of a power transmission system are improved, the maintenance cost is reduced, the maintenance time is shortened, and wide application prospects are achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to power head technical field, concretely is a power head coupling locking structure. BACKGROUND

[0002] In the field of mechanical transmission, the connection structure of power head and coupling plays a crucial role in the performance and stability of the entire power transmission system. As a power source output component, the power head usually needs to transmit power to the coupling, which further transmits power to other working components to achieve various mechanical actions.

[0003] Currently, the existing power head coupling connection structure has some problems to be solved in actual application. Among them, the axial fixation of the coupling on the shaft is particularly prominent. In many traditional connection structures, the axial fixation of the coupling is often not reliable enough, and axial looseness may occur. Once the coupling on the shaft is loose, it will cause unstable power transmission, vibration, noise and other problems, and even cause equipment failure, affecting the normal operation of the entire mechanical system.

[0004] For example, some structures use simple key connection or pin connection. Due to factors such as vibration and impact, the key or pin is prone to wear and looseness during long-term operation, which cannot effectively constrain the axial position of the coupling. Some structures can achieve axial fixation of the coupling, but the operation process is complex and requires special tools or equipment for installation and disassembly, which not only increases the maintenance cost and time of the equipment, but also brings great difficulty to maintenance work in some narrow spaces or inconvenient operations.

[0005] In addition, the existing part of the coupling locking structure is difficult to achieve a good balance between locking effect and unlocking convenience. Some structures use a more complex locking mechanism to ensure locking effect, resulting in a cumbersome unlocking process, and even the need to damage part of the structure to achieve unlocking, which not only increases the difficulty of maintenance, but also causes economic losses. While some structures are convenient to unlock, but the locking effect is not good, and cannot meet the use requirements of the equipment under high speed, heavy load and other working conditions. INVENTION CONTENTS

[0006] In view of the deficiencies of the prior art, the utility model provides a power head coupling locking structure, which solves the problems of unreliable axial fixation of the coupling, complex operation and difficult balance between locking and unlocking in the prior art.

[0007] To achieve the above object, the utility model discloses a power head coupling locking structure, including power head, the axle of rotation connection in the inside of power head, the coupling of setting in the axle end, the screw of screwing in the side portion of coupling, the end of axle is reserved and is equipped with the tooth head, the inside of the inner groove body of the middle part of tooth head is reserved and is equipped with a week, the inside of the inner groove body is equipped with the elastic ring, the section of elastic ring is reserved and is equipped with the notch, the inside of the coupling is equipped with the tooth groove of adapting with tooth head, the inside of the outer groove body of the middle part of tooth groove is reserved and is equipped with a week, the outer groove body corresponds with the inner groove body, the end of screw is integrally connected with the taper head, and the position of the side portion of coupling and the notch is reserved and is equipped with the threaded hole, and the screw is screwed in the inside of threaded hole, and the taper head is opposite the notch.

[0008] Further, the tooth head and the tooth groove are engaged, and the axle can drive the coupling to rotate synchronously when rotating.

[0009] Further, as the screw is continuously screwed into the threaded hole, the taper head gradually opens the notch, the elastic ring expands outward and is engaged with the outer groove body to constrain the axial position of the coupling on the axle, and locking of the coupling is realized.

[0010] Further, the elastic ring can be elastically deformed, and when the screw is loosened, the elastic ring naturally shrinks and returns to the inside of the inner groove body, and is separated from the outer groove body, the axial constraint of the coupling on the axle is released, and unlocking is realized.

[0011] Further, the inner groove body and the outer groove body are annular grooves, the diameter of the inner groove body is the same as that of the outer groove body, and the elastic ring is engaged with the outer groove body after expansion.

[0012] Further, the tooth head and the tooth groove are both multi-tooth structures, and the tooth shape, tooth shape and tooth number of the tooth head are adapted to each other to ensure stable transmission between the axle and the coupling.

[0013] The utility model provides a kind of power head coupling locking structure.Compared with prior art, it has the following beneficial effects:

[0014] The power head coupling locking structure realizes reliable locking and convenient unlocking of the axial position of the coupling on the axle by the ingenious cooperation of the elastic ring, the inner groove body and the outer groove body, and the linkage design of the screw and the taper head, effectively solves the problems of unreliable axial fixation and complex operation of the coupling in the prior art, and significantly improves the stability and reliability of the power transmission system. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is the split structure schematic view of the utility model;

[0016] Figure 2 It is the internal structure schematic view of the coupling in the utility model;

[0017] Figure 3 It is the assembly structure schematic view of the utility model;

[0018] Figure 4 It is the side view of the utility model after assembly;

[0019] Figure 5 It is the sectional view of the utility model Figure 4 A-A;

[0020] Figure 6 It is the top view of the utility model after assembly;

[0021] Figure 7 It is the sectional view of the utility model Figure 6 B-B.

[0022] In the drawing: 1, power head; 2, shaft; 21, tooth head; 3, coupling; 31, tooth slot; 32, outer groove body; 33, threaded hole; 4, inner groove body; 5, elastic ring; 51, notch; 6, screw; 61, taper head. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0024] Please refer to Figures 1-7The utility model provides a kind of technical scheme: a power head coupling locking structure, including power head 1, shaft 2, coupling 3, screw 6 and elastic ring 5.The specific structure of power head 1 and shaft 2 and the mode that power head 1 drives shaft 2 rotation are prior art, not repeat here.The end of shaft 2 is reserved and is provided with tooth head 21, and the middle of tooth head 21 is reserved and is provided with inner groove body 4, and elastic ring 5 is sleeved in inner groove body 4, and notch 51 is reserved and is arranged in the section of elastic ring 5.The end of shaft 2 is sleeved with coupling 3, and the side of coupling 3 is connected with screw 6, and the end of screw 6 is integrally connected with taper head 61, and taper head 61 is in abutment with notch 51.The inside of coupling 3 is provided with tooth groove 31 matched with tooth head 21, and the middle of tooth groove 31 is reserved and is provided with outer groove body 32, and outer groove body 32 corresponds with inner groove body 4.

[0025] When coupling 3 needs to be assembled to the end of shaft 2, coupling 3 is first sleeved on the end of shaft 2.Because tooth head 21 and tooth groove 31 are designed to match, tooth head 21 and tooth groove 31 will be automatically clamped after sleeving.This clamping structure enables shaft 2 to drive coupling 3 to rotate synchronously when rotating, so that the effective transmission of power from shaft 2 to coupling 3 is realized.

[0026] Subsequently, screw 6 is screwed into threaded hole 33 reserved and provided in the side of coupling 3 corresponding to the position of notch 51.As screw 6 is continuously screwed into threaded hole 33, taper head 61 integrally connected to the end of screw 6 will gradually abut against the inside of notch 51.Because taper head 61 has a special taper shape, it will gradually expand notch 51 after abutting against notch 51.As notch 51 is continuously expanded, the section of elastic ring 5 close to notch 51 will gradually expand outward.Because elastic ring 5 itself has elasticity, it will deform elastically, expand out of inner groove body 4 and finally be clamped with outer groove body 32 when subjected to the extrusion of taper head 61.

[0027] When elastic ring 5 is clamped with outer groove body 32, elastic ring 5 will exert an axial constraint force on coupling 3.This constraint force enables the axial position of coupling 3 on shaft 2 to be fixed, thereby realizing the locking of coupling 3.At this time, coupling 3 and shaft 2 not only can rotate synchronously through the meshing of tooth head 21 and tooth groove 31, but also are firmly fixed together in the axial direction, ensuring the stability and reliability of the entire power transmission structure.

[0028] When the coupling 3 needs to be disassembled, the operation opposite to the above locking process is performed. Specifically, the screw 6 is unscrewed in reverse, and as the screw 6 is unscrewed, the tapered head 61 gradually exits the gap 51, and the opening of the gap 51 gradually decreases. Since the elastic ring 5 has elasticity, after losing the extrusion of the tapered head 61, it will naturally shrink and eventually return to the inside of the inner groove body 4. When the elastic ring 5 returns to the inside of the inner groove body 4, it will be separated from the outer groove body 32, thereby releasing the constraint of the elastic ring 5 on the axial position of the coupling 3 on the shaft 2, and achieving the unlocking of the coupling 3. At this time, the coupling 3 can be easily disassembled from the end of the shaft 2.

[0029] The power head coupling locking structure realizes reliable locking and convenient unlocking of the axial position of the coupling 3 on the shaft 2 through the cooperation of the elastic ring 5, the tapered head 61, the gap 51, and the inner groove body 4 and the outer groove body 32. In the locked state, the clamping action of the elastic ring 5 and the outer groove body 32 ensures the stability of the connection between the coupling 3 and the shaft 2, can withstand large axial force and torque, and ensures the accuracy and reliability of power transmission. When disassembly is required, only the screw 6 needs to be unscrewed, and the elastic ring 5 can be automatically retracted and unlocked, which is simple and convenient to operate, greatly improving the maintenance efficiency of the equipment. At the same time, the structure has the advantages of simple structure, low cost, easy manufacturing and installation, etc., and has wide application prospect.

Claims

1. A locking structure for a power head coupling, comprising a power head (1), a shaft (2) rotatably connected inside the power head (1), a coupling (3) sleeved on the end of the shaft (2), and a screw (6) threadedly connected to the side of the coupling (3), characterized in that, The shaft (2) has a toothed head (21) pre-reserved at its end. An inner groove (4) is pre-reserved around the middle of the toothed head (21). An elastic ring (5) is fitted inside the inner groove (4). A notch (51) is pre-reserved in the section of the elastic ring (5). A toothed groove (31) matching the toothed head (21) is pre-reserved around the middle of the toothed groove (31). An outer groove (32) is pre-reserved around the middle of the toothed groove (31). The outer groove (32) corresponds to the inner groove (4). A cone head (61) is integrally connected to the end of the screw (6). A threaded hole (33) is pre-reserved on the side of the coupling (3) at the position corresponding to the notch (51). The screw (6) is threaded into the inside of the threaded hole (33). The cone head (61) abuts against the notch (51).

2. The locking structure for a power head coupling according to claim 1, characterized in that, After the shaft (2) and the coupling (3) are assembled, the tooth head (21) engages with the tooth groove (31), and the shaft (2) can drive the coupling (3) to rotate synchronously when it rotates.

3. The locking structure for a power head coupling according to claim 1, characterized in that, As the screw (6) is continuously screwed into the threaded hole (33), the cone (61) gradually opens the notch (51), causing the elastic ring (5) to expand outward and engage with the outer groove (32) to constrain the axial position of the coupling (3) on the shaft (2) and achieve locking of the coupling (3).

4. The locking structure for a power head coupling according to claim 1, characterized in that, The elastic ring (5) can undergo elastic deformation. When the screw (6) is loosened, the elastic ring (5) naturally shrinks and returns to the interior of the inner groove (4), disengaging from the outer groove (32), releasing the axial constraint of the coupling (3) on the shaft (2), and unlocking.

5. The locking structure for a power head coupling according to claim 1, characterized in that, Both the inner groove (4) and the outer groove (32) are annular grooves, and the diameter of the inner groove (4) is the same as the diameter of the outer groove (32). The elastic ring (5) engages with the outer groove (32) after expansion.

6. The locking structure for a power head coupling according to claim 1, characterized in that, Both the tooth head (21) and the tooth groove (31) are multi-tooth structures, and the tooth shape of the tooth head (21) is compatible with the tooth shape and number of teeth of the tooth groove (31) to ensure stable transmission between the shaft (2) and the coupling (3).

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