CN111306165A

CN111306165A - Locking mechanism

Info

Publication number: CN111306165A
Application number: CN201811511464.3A
Authority: CN
Inventors: 何健; 徐伟; 陈新友
Original assignee: Hangzhou Hikvision Digital Technology Co Ltd
Current assignee: Hangzhou Hikmicro Sensing Technology Co Ltd
Priority date: 2018-12-11
Filing date: 2018-12-11
Publication date: 2020-06-19
Anticipated expiration: 2038-12-11
Also published as: CN111306165B

Abstract

The invention discloses a locking mechanism, comprising: the shaft carrier is provided with a shaft hole; the shaft end of the connecting shaft penetrates into the shaft carrier from the shaft hole; the locking block is used for detachably clamping the connecting shaft in the shaft carrier; the detachable clamping device is arranged on the connecting shaft and comprises a detachable clamping device, a clamping device and a clamping device, wherein the detachable clamping device is clamped on the axis direction of the connecting shaft and forms a limit position in the rotating direction, and the detachable clamping device is crossed with the axis direction of the connecting shaft in the detachable clamping direction. According to the present invention, since the lock limit of the connecting shaft can be attached and detached in the direction intersecting the axial direction of the connecting shaft, it is possible to apply to a case where the operation space in the axial direction is small, and at the same time, it is possible to contribute to securing the mounting accuracy.

Description

Locking mechanism

Technical Field

The invention relates to a locking mechanism, which is particularly suitable for locking connection with small operation space and high installation precision.

Background

For the requirement of implementing rotary locking to the connecting shaft, a limiting screw is often installed along the axial direction of the connecting shaft or a limiting nut is installed at the shaft end of the connecting shaft in the prior art.

However, whether the limit screw or the limit nut is mounted, it is necessary to provide a sufficient operation space in the axial direction of the connecting shaft. Therefore, the above-described solution in the related art is difficult to be applied to a case where the operation space in the axial direction is small, or in a case where the operation space in the axial direction is small, it is difficult to ensure desired mounting accuracy.

Disclosure of Invention

An embodiment of the present invention provides a lock mechanism in which a lock limit of a connecting shaft can be attached and detached in a direction intersecting with an axial direction of the connecting shaft, and thus, the lock mechanism can be applied to a case where an operation space in the axial direction is small, and at the same time, helps ensure mounting accuracy.

The present invention provides a lock mechanism, including:

the shaft carrier is provided with a shaft hole;

the shaft end of the connecting shaft penetrates into the shaft carrier from the shaft hole;

the locking block is used for detachably clamping the connecting shaft in the shaft carrier;

the detachable clamping device is arranged on the connecting shaft and comprises a detachable clamping device, a clamping device and a clamping device, wherein the detachable clamping device is clamped on the axis direction of the connecting shaft and forms a limit position in the rotating direction, and the detachable clamping device is crossed with the axis direction of the connecting shaft in the detachable clamping direction.

Optionally, the shaft hole is provided with a rotation stopping edge, and the shaft end is provided with a notch matched with the rotation stopping edge in a limiting way.

Optionally, a clamping groove is formed in the shaft end, the clamping groove penetrates through the shaft end along the dismounting direction of the detachable clamping, and the locking block is provided with a sinking platform, which is in sliding fit with the clamping groove along the dismounting direction of the detachable clamping, and is in spacing fit with the clamping groove in the axial direction and the rotating direction of the connecting shaft.

Optionally, the locking grooves are arranged at the shaft ends in pairs, the locking blocks are provided with openings for accommodating the shaft ends, and the sinking platforms are arranged at the edges of the openings in pairs at positions corresponding to the locking grooves.

Optionally, the clamping grooves arranged in pairs are symmetrically arranged relative to the axis of the connecting shaft.

Optionally, the shaft carrier has a pair of bosses disposed therein, and the locking block is detachably fixed to the bosses on both sides of the opening of the notch.

Optionally, the locking block is provided with mounting plates on two sides of the opening of the notch, and the mounting plates are fixed on the boss through screws.

Optionally, the locking block further forms a wedge surface press fit with the inside of the shaft carrier.

Optionally, the connecting shaft is in the shaft section with the juncture of axle head is formed with the shaft shoulder, the shaft shoulder is located the outside of axle carrier, the shaft shoulder towards the one side of axle head has the seal groove, the built-in sealing washer that is equipped with of seal groove.

Optionally, the connecting shaft has a cable lumen extending through the shaft segment and the shaft end, and the cable lumen communicates with the interior of the shaft carrier.

As can be seen from the above, based on the above-described embodiment, since the lock limit of the connecting shaft can be detached in the direction intersecting the axial direction of the connecting shaft, it is possible to adapt to a case where the operation space in the axial direction is small, and at the same time, it is possible to contribute to ensuring the mounting accuracy.

Drawings

FIG. 1 is an exploded view of a locking mechanism in one embodiment;

FIG. 2 is a schematic structural view of a shaft carrier of the locking mechanism shown in FIG. 1;

FIG. 3 is a schematic structural view of a connecting shaft of the locking mechanism shown in FIG. 1;

FIGS. 4a and 4b are schematic views of the structure of the locking block of the locking mechanism shown in FIG. 1;

FIG. 5 is a schematic view of the assembled structure of the locking mechanism shown in FIG. 1;

FIG. 6 is a sectional view taken along section A of FIG. 5;

fig. 7 is a sectional view of B in fig. 5.

Reference numerals:

10-axis carrier

11 bearing wall

111 axle hole

112 stop edge

113 boss

114 mounting hole

115 locating column

12 first peripheral wall

13 second peripheral wall

14 third peripheral wall

100 inner cavity

20 connecting shaft

21 shaft segment

22 axle end

23 gap

24 card slot

25 shaft shoulder

26 seal groove

27 locating hole

200 cable lumen

30 locking block

31 gap

32 sink table

320 guide inclined plane

33 mounting plate

34 through hole

35 screw

36 wedge surface

40 sealing ring

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the accompanying drawings and examples.

Fig. 1 is an exploded view of a lock mechanism in one embodiment. Referring to fig. 1, in one embodiment, a locking mechanism includes a shaft carrier 10, a connecting shaft 20, and a locking block 30.

Fig. 2 is a schematic view of the shaft carrier of the locking mechanism shown in fig. 1. Referring to fig. 2 in conjunction with fig. 1, in this embodiment, the shaft carrier 10 includes a bearing wall 11 for mounting the connecting shaft 20, a first peripheral wall 12 disposed opposite to the bearing wall 11, and a second peripheral wall 13 and a third peripheral wall 14 connected between the bearing wall 11 and opposite sides of the side wall 12, so that the bearing wall 11, the first peripheral wall 12, the second peripheral wall 13, and the third peripheral wall 14 surround and form an inner cavity 100.

As can be seen from fig. 1 and 2, the shaft carrier 10 is opened with a shaft hole 111, and the shaft hole 111 is formed in the bearing wall 11. The shaft hole 111 has a rotation stopping edge 112 for preventing the rotation of the connecting shaft 20. It is understood that the embodiment is merely exemplary of the rotation-stopping edge 112 being a straight edge, and is not meant to exclude other possible shapes of the rotation-stopping edge 112. Moreover, in this embodiment, the rotation stopping edges 112 are arranged in pairs, but only one rotation stopping edge 112 or more than two rotation stopping edges 112 may be arranged, because the main function of the rotation stopping edges 112 is to form an obstacle area for preventing rotation in the arc edge of the shaft hole 111, and the number of the obstacle areas does not affect the generation of the rotation stopping effect.

In addition, the shaft carrier 10 has bosses 113 for fixing the locking piece 30, the bosses 113 are arranged in pairs on the bearing wall 11 of the shaft carrier 10, and the end faces of the bosses 113 are formed with mounting holes 114.

Fig. 3 is a schematic structural view of a connecting shaft of the locking mechanism shown in fig. 1. Referring to fig. 3 in conjunction with fig. 1, in this embodiment, the coupling shaft 20 has a shaft section 21, a shaft end 22 is formed at a distal end of the shaft section 21, and the coupling shaft 20 has a cable lumen 200 extending through the shaft section 21 and the shaft end 22.

As can also be seen from fig. 1 and 3, the peripheral surface of the shaft end 22 has a notch 23 for a limit fit with the rotation stop edge 112, and the peripheral surface of the shaft end 22 also has a slot 24 staggered with the notch 23.

The notch 23 has a flat surface to match the rotation-stopping edge 112 with a straight edge, similar to the rotation-stopping edge 112 described above, but if the rotation-stopping edge 112 has other shapes or numbers, the matching surface of the notch 23 can be adjusted accordingly.

The engaging groove 24 penetrates the shaft end 22 in a direction intersecting the axial direction of the connecting shaft 20, and the extending direction of the engaging groove 24 restricts the attaching and detaching direction of the lock block 30. In this embodiment, for example, the slots 24 are arranged in pairs at the shaft end 22 and symmetrically arranged with respect to the axis of the connecting shaft 20, the constraint on the assembling and disassembling directions of the locking block 30 can be more stable by adopting the manner that the slots 24 are arranged in pairs, but it is understood that the number of the slots 24 may also be one or more than two.

In addition, a shoulder 25 is formed at the boundary between the shaft segment 21 and the shaft end 22 of the connection shaft 20, a seal groove 26 is formed in a surface of the shoulder 25 facing the shaft end 22, and a seal ring 40 is installed in the seal groove 26. Referring to fig. 2 and 3 in particular, the side of the shoulder 25 facing the shaft end 22 may further have a positioning hole 27, and correspondingly, the outer surface of the bearing wall 11 is formed with a positioning post 115 capable of being inserted into the positioning hole 27, and the fit between the positioning hole 27 and the positioning post 115 helps to guide the alignment fit of the notch 23 and the rotation stopping edge 112, and can further enhance the limit in the rotation direction of the connecting shaft 20 based on the limit fit of the notch 23 and the rotation stopping edge 112.

Fig. 4a and 4b are schematic structural views of the locking block of the locking mechanism shown in fig. 1. Referring to fig. 4a and 4b in conjunction with fig. 1, in this embodiment, the locking block 30 is formed with a notch 31 for avoiding the axial end 22 of the connecting shaft 20, and the locking block 30 further has a counter-sunk 32 for cooperating with the slot 24, and since the slots 24 are arranged in pairs in this embodiment, the counter-sunk 32 are also arranged in pairs, i.e. the counter-sunk 32 are arranged in pairs at the edge of the notch 31 at the position corresponding to the slot 24. Each sinking platform 32 can be in sliding fit with the corresponding clamping groove 24, the sinking platform 32 sliding into the clamping groove 24 and the clamping groove 24 can form locking on the connecting shaft 20, the locking comprises limiting in the axial direction and the rotating direction of the connecting shaft 20, and the sinking platform 32 can slide out of the clamping groove 24 to unlock the connecting shaft 20. Wherein the platform 32 has a guide ramp 320 to facilitate its sliding into the slot 24.

As can be seen from fig. 1 and fig. 4a and 4b, the locking block 30 is formed with mounting plates 33 on both sides of the opening of the slit 300, and the mounting plates 33 can be fixed to the mounting holes 114 of the bosses 113 by screws 35 passing through the through holes 34.

In addition, referring back to fig. 1, the inner surface of the bearing wall 11 is inclined at an angle α 1 with respect to the axial direction of the mounting hole 24, and the side of the locking block 30 facing the bearing wall 11 is formed with a wedge surface 36, the wedge surface 36 is inclined at an angle α 2 in the same direction as the inner surface of the bearing wall 11, and α 2 is equal to 1.

Fig. 5 is a schematic view showing an assembly structure of the locking mechanism shown in fig. 1. Fig. 6 is a sectional view of a in fig. 5. Fig. 7 is a sectional view of B in fig. 5. Referring to fig. 5 in conjunction with fig. 6 and 7, when the locking mechanism in this embodiment is assembled according to the chain line shown in fig. 1:

the shaft portion 21 of the connecting shaft 20 is located outside the shaft carrier 10, and the shoulder 25 is also located outside the shaft carrier 10, and presses the seal ring 40 provided in the seal groove 26 against the outside of the shaft carrier 10, which is the outside of the bearing wall 11. The positioning hole 27 of the shoulder 25 is fitted into the positioning post 115 projecting from the outer side of the support wall 11.

The shaft end 22 of the connecting shaft 20 penetrates from the shaft hole 111 to the inside of the shaft carrier 10, so that the cable lumen 200 of the connecting shaft 20 communicates with the inside (i.e., the inner cavity 100) of the shaft carrier 10; furthermore, the notch 23 of the shaft end 22 can be easily positioned to an angle of limit-fit with the rotation stop edge 112 by the engagement of the positioning hole 27 of the shoulder 25 and the positioning post 115 of the bearing wall 11.

The locking block 30 can move along the assembling and disassembling direction defined by the slot 24, and the sinking platform 32 can easily slide into the slot 24 based on the guiding of the guiding inclined plane 320 to form the locking of the connecting shaft 20. The lock block 30 is detachably fixed to the boss 113 at both sides of the opening of the notch 31 by screws 35 inserted into the mounting holes 34 of the mounting plate 33.

Thus, the locking block 30 forms a detachable clamp to the connecting shaft 20 inside the shaft carrier 10, wherein the detachable clamp can form a limit in both the axial direction and the rotational direction of the connecting shaft 20, and the detachable clamp has a disassembly direction intersecting with the axial direction of the connecting shaft 20, which is perpendicular or approximately perpendicular to the axial direction of the connecting shaft 20 in this embodiment.

Based on the above-described embodiment, since the lock limit of the connecting shaft 20 can be attached and detached in the direction intersecting the axial direction of the connecting shaft 20, that is, the lock block 30 is attached and detached, it is possible to apply to a case where the operation space in the axial direction is small, and at the same time, it is possible to contribute to securing the mounting accuracy.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.

Claims

1. A locking mechanism, comprising:

the shaft carrier (10), the shaft carrier (10) is provided with a shaft hole (111);

a connecting shaft (20), wherein a shaft section (21) of the connecting shaft (20) is positioned on the outer side of the shaft carrier (10), and a shaft end (22) of the connecting shaft (20) penetrates into the shaft carrier (10) from the shaft hole (111);

the locking block (30), the locking block (30) can detachably clamp the connecting shaft (20) in the shaft carrier (10);

the detachable clamping is limited in the axial direction and the rotating direction of the connecting shaft (20), and the detachable clamping direction is intersected with the axial direction of the connecting shaft (20).

2. The locking mechanism according to claim 1, characterized in that the shaft hole (11) has a rotation-stopping edge (112), and the shaft end (22) has a notch (23) which is in limit fit with the rotation-stopping edge (112).

3. The locking mechanism as claimed in claim 1, wherein the shaft end (22) is provided with a locking groove (24), the locking groove (24) penetrates through the shaft end (22) along the assembling and disassembling direction of the detachable clamping block, and the locking block (30) is provided with a sinking platform (32), the sinking platform (32) is in sliding fit with the locking groove (24) along the assembling and disassembling direction of the detachable clamping block and is in limit fit with the locking groove (24) in the axial direction and the rotating direction of the connecting shaft.

4. A locking mechanism according to claim 3, wherein the locking grooves (24) are arranged in pairs at the shaft ends (22), the locking block (30) has a notch (31) for receiving the shaft ends (22), and the counter-sunk portions (32) are arranged in pairs at the edges of the notch (31) at positions corresponding to the locking grooves (24).

5. The locking mechanism according to claim 4, characterized in that the locking grooves (24) provided in pairs are arranged symmetrically with respect to the axis of the connecting shaft (20).

6. Locking mechanism according to claim 4, characterized in that the axle carrier (10) is provided with pairs of bosses (113) on its inside and that the locking piece (30) is detachably fastened to the bosses (113) on both sides of the opening of the slit (31).

7. The lock mechanism according to claim 6, wherein the lock block (30) is formed with mounting plates (33) on both sides of the opening of the slit (300), and the mounting plates (33) are fixed to the bosses (113) by screws (35).

8. The locking mechanism of claim 1, wherein the locking block (30) further forms a wedge press fit with the inside of the shaft carrier (10).

9. The locking mechanism of claim 1, wherein the connecting shaft (20) is formed with a shoulder (25) at the intersection of the shaft segment (21) and the shaft end (22), the shoulder (25) is located outside the shaft carrier (10), a sealing groove (26) is formed on a surface of the shoulder (25) facing the shaft end (22), and a sealing ring (40) is installed in the sealing groove (26).

10. The locking mechanism of claim 1, wherein the connecting shaft (20) has a cable lumen (200) extending through the shaft segment (21) and the shaft end (22), and wherein the cable lumen (200) communicates with the interior of the shaft carrier (10).