Locking mechanism for expansion sleeve

Abstract

The utility model relates to the technical field of expansion sleeves, in particular to a locking mechanism for an expansion sleeve, which comprises an outer ring sleeve and a connecting ring, an inner ring sleeve is sleeved on the inner side of the outer ring sleeve, the connecting ring is sleeved on the outer side of the outer ring sleeve, and a bolt penetrates through threads on the inner side of the inner ring sleeve. The device has the beneficial effects that a bolt can be installed on the outer ring sleeve and in a threaded hole of the inner ring sleeve, then a connecting ring is connected to the outer side of the outer ring sleeve in a sleeving mode, the connecting ring is rotated, a threaded groove is in threaded connection with a mounting ring, an inserting rod is inserted into the inner side of the connecting ring, and meanwhile the outer wall of the inserting rod extrudes a limiting rod to drive a limiting spring to contract; then one end of the inserting rod is inserted into the inserting hole, the limiting spring rebounds to drive one end of the limiting rod to be inserted into the limiting hole, the position of the inserting rod is limited, the bolt can be limited through the inserting rod, the stability of the bolt is improved through multiple limiting, and the connecting stability of the locking mechanism for the expansion sleeve is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of expansion sleeves, in particular to a locking mechanism for expansion sleeves. Background Art

[0002] A locking sleeve, also known as a mechanical locking sleeve, is a mechanical part used to connect and fix a shaft and a shaft hole. It is usually made of metal and has inner and outer cylindrical surfaces for matching with the shaft and the shaft hole. The function of the locking sleeve is to firmly connect the shaft and the shaft hole through the principle of mechanical expansion to achieve the functions of transmitting torque and fixing the position. The locking mechanism used for the locking sleeve usually includes bolts, sleeves and other auxiliary components to control the expansion force and release force of the locking sleeve to ensure the reliable connection and fixation of the shaft and the shaft hole.

[0003] When the existing locking mechanism for the expansion sleeve is in use, since the locking mechanism for the expansion sleeve is usually achieved by locking through a plurality of bolts, and vibration occurs when the equipment or shaft is running, the bolts are prone to loosening after being used for a long time, reducing the stability of the locking mechanism of the expansion sleeve. Therefore, we propose a locking mechanism for the expansion sleeve. Utility Model Content

[0004] The purpose of the utility model is to provide a locking mechanism for an expansion sleeve to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a locking mechanism for an expansion sleeve, comprising an outer ring sleeve and a connecting ring, the inner side of the outer ring sleeve is sleeved with an inner ring sleeve, the connecting ring is sleeved on the outer side of the outer ring sleeve, the inner side of the inner ring sleeve is threaded with a bolt, a threaded hole is provided on the side of the outer ring sleeve close to the bolt, and one end of the bolt is threadedly connected to the threaded hole, a limiting mechanism is provided on the inner side of the connecting ring close to the bolt, one end of the limiting mechanism is connected to the bolt, the limiting mechanism comprises a socket, a limiting rod, a limiting spring, an insert rod and a limiting hole, and the inner side of the connecting ring is slidably penetrated by the insert rod.

[0006] Preferably, a limiting rod passes through a side of the connecting ring close to the insertion rod, and a limiting spring is sleeved on the outer side of the limiting rod.

[0007] Preferably, a limiting hole is provided on one side of the insertion rod close to the limiting rod, and an insertion hole is provided on the outer side of the bolt close to the insertion rod.

[0008] Preferably, the outer side of the outer ring sleeve is fixedly sleeved with a fixing ring, one side of the fixing ring is provided with a mounting ring, and a threaded groove is provided on the side of the outer ring sleeve close to the mounting ring.

[0009] Preferably, a positioning plate is fixed on the side of the inner ring sleeve close to the outer ring sleeve, an annular groove is opened on the side of the outer ring sleeve close to the positioning plate, a positioning mechanism is provided at one end of the positioning plate, and one side of the positioning mechanism is connected to the outer ring sleeve.

[0010] Preferably, the positioning mechanism comprises a positioning block, a return spring and a positioning hole, and a return spring is provided in the built-in groove of the positioning plate.

[0011] Preferably, a positioning block is provided on one side of the return spring, and the positioning block is slidably connected to the built-in groove of the positioning plate, and positioning holes distributed at intervals are opened on the inner wall of the outer ring sleeve close to the positioning block.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] The locking mechanism for the expansion sleeve proposed by the utility model can install the bolts into the threaded holes of the outer ring sleeve and the inner ring sleeve, and then the connecting ring sleeve is connected to the outside of the outer ring sleeve, and the connecting ring is rotated to make the threaded connection between the threaded groove and the installation ring, and then the insertion rod is inserted into the inner side of the connecting ring, and at the same time, the outer wall of the insertion rod squeezes the limit rod to drive the limit spring to contract, and then one end of the insertion rod is inserted into the insertion hole, and the limit spring rebounds to drive one end of the limit rod to insert into the limit hole, limiting the position of the insertion rod, so that the insertion rod can limit the bolt, and the multiple limits improve the stability of the bolt, which is beneficial to improving the connection stability of the locking mechanism for the expansion sleeve. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the main structure of the utility model;

[0015] Figure 2 This is a schematic diagram of the main cross-sectional structure of the utility model;

[0016] Figure 3 This is an enlarged structural diagram of the utility model at A;

[0017] Figure 4 This is a schematic diagram of the top view of the outer ring sleeve of the utility model;

[0018] Figure 5 This is a schematic diagram of the structure of the connecting ring of the utility model when viewed from above;

[0019] Figure 6 This is a schematic diagram of the cross-sectional structure of the bolt of the utility model from top view;

[0020] Figure 7 This is a schematic diagram of the three-dimensional structure of the inner ring sleeve of the utility model;

[0021] Figure 8 It is a schematic diagram of the three-dimensional structure of the bolt of the utility model.

[0022] In the figure: 1, outer ring sleeve; 2, inner ring sleeve; 3, fixing ring; 4, bolt; 5, connecting ring; 6, positioning plate; 7, mounting ring; 8, limiting mechanism; 801, jack; 802, limiting rod; 803, limiting spring;

[0023] 804, plug rod; 805, limit hole; 9, positioning mechanism; 901, positioning block; 902, return spring;

[0024] 903, positioning hole; 10, annular groove; 11, threaded groove; 12, threaded hole. DETAILED DESCRIPTION

[0025] In order to make the purpose and technical solution of the utility model clearly and completely described, and the advantages more clearly understood, the embodiments of the utility model are further described in detail in conjunction with the accompanying drawings. It should be understood that the specific embodiments described here are part of the embodiments of the utility model, not all of the embodiments, and are only used to explain the embodiments of the utility model, and are not used to limit the embodiments of 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.

[0026] Embodiment 1

[0027] See also Figure 1-Figure 4 and Figure 6-Figure 8 The utility model provides a technical solution: a locking mechanism for an expansion sleeve, comprising an outer ring sleeve 1 and a connecting ring 5, the inner side of the outer ring sleeve 1 is sleeved with an inner ring sleeve 2, the connecting ring 5 is sleeved on the outer side of the outer ring sleeve 1, the inner side thread of the inner ring sleeve 2 is penetrated by a bolt 4, a threaded hole 12 is opened on the side of the outer ring sleeve 1 close to the bolt 4, and one end of the bolt 4 is threadedly connected to the threaded hole 12.

[0028] In specific implementation, when installing the expansion sleeve on the shaft, the outer ring sleeve 1 can be put on the shaft first, and then the inner ring sleeve 2 can be put on the shaft, and one end of the inner ring sleeve 2 extends into the inner side of the outer ring sleeve 1, and then the bolt 4 is inserted and rotated into the threaded hole 12 to install and lock the expansion sleeve on the shaft.

[0029] Embodiment 2

[0030] See also Figure 1-Figure 6 and Figure 8On the basis of the first embodiment, a limiting mechanism 8 is provided on the inner side of the connecting ring 5 near the bolt 4, one end of the limiting mechanism 8 is connected to the bolt 4, the limiting mechanism 8 comprises a socket 801, a limiting rod 802, a limiting spring 803, an insertion rod 804 and a limiting hole 805, the inner side of the connecting ring 5 is slidably penetrated by the insertion rod 804, the side of the connecting ring 5 near the insertion rod 804 penetrates the limiting rod 802, the outer side of the limiting rod 802 is sleeved with the limiting spring 803, the side of the insertion rod 804 near the limiting rod 802 is provided with a limiting hole 805, the outer side of the bolt 4 near the insertion rod 804 is provided with a socket 801, the outer side of the outer ring sleeve 1 is fixedly sleeved with a fixing ring 3, one side of the fixing ring 3 is provided with a mounting ring 7, the side of the outer ring sleeve 1 near the mounting ring 7 is provided with a threaded groove 11, and one side of the limiting rod 802 is set to be inclined.

[0031] In specific implementation, since the locking mechanism for the expansion sleeve is usually achieved by locking through a plurality of bolts 4, and vibration will occur during the operation of the equipment or shaft, the bolts 4 are prone to loosening after a long period of use, thereby reducing the stability of the locking mechanism of the expansion sleeve. The bolts 4 can be installed on the outer ring sleeve 1 and in the threaded holes 12 of the inner ring sleeve 2, and then the connecting ring 5 is sleeved on the outside of the outer ring sleeve 1, and the connecting ring 5 is rotated so that the threaded groove 11 is threadedly connected with the mounting ring 7, and then the insertion rod 804 is inserted into the inner side of the connecting ring 5. At the same time, the outer wall of the insertion rod 804 squeezes the limiting rod 802 to drive the limiting spring 803 to contract, and then one end of the insertion rod 804 is inserted into the insertion hole 801, and the limiting spring 803 rebounds to drive one end of the limiting rod 802 to insert into the limiting hole 805, limiting the position of the insertion rod 804, so that the insertion rod 804 can limit the bolt 4, and multiple limits improve the stability of the bolt 4, which is beneficial to improving the connection stability of the locking mechanism for the expansion sleeve.

[0032] Embodiment 3

[0033] See also Figure 1-Figure 4 and Figure 7 On the basis of the second embodiment, a positioning plate 6 is fixed to the side of the inner ring sleeve 2 close to the outer ring sleeve 1, and an annular groove 10 is provided on the side of the outer ring sleeve 1 close to the positioning plate 6. A positioning mechanism 9 is provided at one end of the positioning plate 6, and one side of the positioning mechanism 9 is connected to the outer ring sleeve 1. The positioning mechanism 9 includes a positioning block 901, a reset spring 902 and a positioning hole 903. A reset spring 902 is provided in the built-in groove of the positioning plate 6, and a positioning block 901 is provided on one side of the reset spring 902, and the positioning block 901 is slidably connected to the built-in groove of the positioning plate 6. The inner wall of the outer ring sleeve 1 close to the positioning block 901 is provided with spaced positioning holes 903, and the cross-sectional shape of the positioning block 901 is triangular.

[0034] In specific implementation, when installing the locking mechanism for the expansion sleeve onto the shaft, it is usually necessary to manually adjust the docking position of the inner ring sleeve 2 and the outer ring sleeve 1, which is rather troublesome. The positioning plate 6 of the inner ring sleeve 2 can be inserted into the annular groove 10 first, and then the reset spring 902 rebounds to drive the positioning block 901 to be inserted into the positioning hole 903, which can limit the position of the positioning plate 6 and the inner ring sleeve 2. Finally, the bolt 4 can be installed. The positioning plate 6 can facilitate the docking of the inner ring sleeve 2 and the outer ring sleeve 1, thereby improving the convenience of the locking mechanism for the expansion sleeve.

[0035] In actual use, the outer ring sleeve 1 and the inner ring sleeve 2 can be first sleeved onto the outside of the shaft, and then assisted in positioning by the positioning mechanism 9 to facilitate the installation of the bolt 4. The bolt 4 is then inserted into the annular groove 10 to limit the position of the inner ring sleeve 2, and then the connecting ring 5 is sleeved onto the outer ring sleeve 1. The position of the bolt 4 is then limited by the limiting mechanism 8 to improve the stability of the bolt 4. The limiting mechanism 8 and the positioning mechanism 9 improve the stability and convenience of the locking mechanism for the expansion sleeve.

[0036] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A locking mechanism for an expansion sleeve, comprising an outer ring sleeve (1) and a connecting ring (5), characterized in that: The inner side of the outer ring sleeve (1) is sleeved with the inner ring sleeve (2), the connecting ring (5) is sleeved with the outer side of the outer ring sleeve (1), the inner side of the inner ring sleeve (2) is threaded with a bolt (4), a threaded hole (12) is provided on the side of the outer ring sleeve (1) close to the bolt (4), and one end of the bolt (4) is threadedly connected to the threaded hole (12), a limiting mechanism (8) is provided on the inner side of the connecting ring (5) close to the bolt (4), one end of the limiting mechanism (8) is connected to the bolt (4), the limiting mechanism (8) comprises a socket (801), a limiting rod (802), a limiting spring (803), an insert rod (804) and a limiting hole (805), and the inner side of the connecting ring (5) is slidably penetrated by the insert rod (804).

2. A locking mechanism for a locking sleeve according to claim 1, characterized in that: A limiting rod (802) passes through the side of the connecting ring (5) close to the insertion rod (804), and a limiting spring (803) is sleeved on the outer side of the limiting rod (802).

3. A locking mechanism for a locking sleeve according to claim 2, characterized in that: A limiting hole (805) is provided on one side of the insertion rod (804) close to the limiting rod (802), and an insertion hole (801) is provided on the outer side of the bolt (4) close to the insertion rod (804).

4. A locking mechanism for a locking sleeve according to claim 1, characterized in that: The outer side of the outer ring sleeve (1) is fixedly sleeved with a fixing ring (3), one side of the fixing ring (3) is provided with a mounting ring (7), and the side of the outer ring sleeve (1) close to the mounting ring (7) is provided with a threaded groove (11).

5. A locking mechanism for a expansion sleeve according to claim 4, characterized in that: A positioning plate (6) is fixed on the side of the inner ring sleeve (2) close to the outer ring sleeve (1), an annular groove (10) is provided on the side of the outer ring sleeve (1) close to the positioning plate (6), a positioning mechanism (9) is provided at one end of the positioning plate (6), and one side of the positioning mechanism (9) is connected to the outer ring sleeve (1).

6. A locking mechanism for a locking sleeve according to claim 5, characterized in that: The positioning mechanism (9) comprises a positioning block (901), a return spring (902) and a positioning hole (903), and a return spring (902) is arranged in the built-in groove of the positioning plate (6).

7. A locking mechanism for a locking sleeve according to claim 6, characterized in that: A positioning block (901) is provided on one side of the return spring (902), and the positioning block (901) is slidably connected to the built-in groove of the positioning plate (6), and positioning holes (903) distributed at intervals are opened on the inner wall of the outer ring sleeve (1) close to the positioning block (901).

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