CN211398222U

CN211398222U - Locking mechanism

Info

Publication number: CN211398222U
Application number: CN201921956804.3U
Authority: CN
Inventors: 张志军; 林上民; 王�锋; 翟波
Original assignee: XiAn Institute of Optics and Precision Mechanics of CAS
Current assignee: XiAn Institute of Optics and Precision Mechanics of CAS
Priority date: 2019-11-13
Filing date: 2019-11-13
Publication date: 2020-09-01
Anticipated expiration: 2029-11-13

Abstract

In order to solve the problems that the existing locking mode can damage the matching threads between the thread matching structures and can lead the matching threads to be permanently fixed and difficult to unlock, the utility model provides a locking mechanism, which comprises a set screw and a structural gasket made of plastic, copper or aluminum; the set screw comprises a nut, a first screw rod, a polish rod and a second screw rod which are connected in sequence; the first screw rod is matched with a threaded hole in the structure body to be locked; the structural gasket is integrally cylindrical and the lower end of the structural gasket is closed; the structural gasket is provided with a threaded hole groove and a cylindrical inner cavity capable of accommodating a second screw rod from top to bottom; the internal thread of the thread hole groove is matched with the external thread of the second screw rod; during the unblock, along with holding screw's back-out, the structure gasket makes the easy set screw of being taken out of structure gasket with holding screw's second screw rod screw-thread fit gradually, does benefit to deviating from and changing of structure gasket, prevents that the structure gasket from leading to the gasket bits to drop and cause the unblock inefficacy because of locking and unblock repeatedly.

Description

Locking mechanism

Technical Field

The utility model relates to a locking mechanism can be used to the locking of screw-thread fit structure, also can be used to not have the cooperation screw thread between two structures, but one of them structure surface has the locking between two structures of comparatively sharp-pointed protruding structure.

Background

Often use screw-thread fit structure to fix in the engineering application, but along with the influence of thermal environment, vibration environment, when only relying on the screw-thread fit, the cooperation precision often can reduce along with the time lapse and even become invalid, consequently need guarantee its cooperation precision for screw-thread fit structural design locking mechanism.

At present, locking between a to-be-locked structural body I and a to-be-locked structural body II which are matched through threads is realized by using a set screw; when locking is needed, the tip of a set screw is inserted into a threaded hole of the first structure body to be locked and tightly props against the matching threads of the first structure body to be locked and the second structure body to be locked, so that the matching threads between the first structure body to be locked and the second structure body to be locked are locked; when the unlocking is needed, the set screw is withdrawn. The disadvantages of this locking method are: the tip of the fastening screw damages the matching threads between the first structure body to be locked and the second structure body to be locked, and particularly when the first structure body to be locked and the second structure body to be locked are in large torque transmission, the matching threads of the first structure body to be locked and the second structure body to be locked can be permanently fixed, and unlocking is difficult to achieve.

SUMMERY OF THE UTILITY MODEL

In order to solve the current locking mode and can cause the damage to the cooperation screw thread between the screw-thread fit structure to and probably lead to the permanent solid of cooperation screw thread and be difficult to the technical problem of unblock, the utility model provides a locking mechanism.

The technical scheme of the utility model is that:

a locking mechanism comprising a set screw; it is characterized in that:

the set screw comprises a nut, a first screw rod, a polish rod and a second screw rod which are connected in sequence; the first screw rod is matched with a threaded hole in the structure body to be locked; the diameter of the polished rod is smaller than the major diameter of the thread of the first screw; the major diameter of the thread of the second screw is smaller than that of the thread of the first screw;

also includes a structural gasket; the structural gasket is integrally cylindrical, and has an opening at the upper end and a closed lower end; the structural gasket is provided with a thread hole groove and a cylindrical inner cavity capable of accommodating the second screw rod from top to bottom in sequence along the axial direction; the internal thread of the thread hole groove is matched with the external thread of the second screw rod; the axial length of the cylindrical inner cavity is greater than that of the second screw;

the structural gasket is sleeved outside the set screw and is positioned at the polished rod and the second screw rod;

the structural gasket is made of plastic, copper or aluminum.

Further, the bottom thickness of the structural washer is greater than the depth of the thread to be pressed in.

Further, the structural gasket is made of polytetrafluoroethylene.

The utility model has the advantages that:

1. the utility model discloses when the unblock, along with holding screw's back-off, the structure gasket gradually with holding screw's second screw rod screw-thread fit for the structure gasket is taken out by holding screw easily, is favorable to deviating from and changing of structure gasket, prevents that the structure gasket from leading to the gasket bits end to drop because of locking repeatedly and unblock and causing the unblock to become invalid, has improved the reliability that improves locking and unblock.

2. The utility model discloses in the screw hole of treating locking structure body one is impressed by holding screw to the structure gasket, because the structure gasket material is softer, can compress tightly and inlay in treating locking structure body one and treating the cooperation screw thread of locking structure body two by holding screw to can not cause the damage to this cooperation screw thread, be favorable to the unblock of cooperation screw thread and use repeatedly.

3. When the set screw is slightly loosened under the influence of a heating environment, a vibration environment and the like, the structural gasket is not influenced by being embedded into the thread, and the locking function can still be effectively realized.

4. The utility model discloses well structure gasket embedding face is far greater than prior art's holding screw most advanced, can more effective realization locking.

5. The utility model discloses only have two parts, structural style is simple, easy operation.

Drawings

Fig. 1 is a schematic cross-sectional view of a set screw according to the present invention.

Fig. 2 is a schematic cross-sectional view of the structural gasket of the present invention.

Fig. 3 is a schematic diagram of an application example of the present invention.

Fig. 4 is a schematic diagram of an application example of the present invention.

Fig. 5 is a first schematic view of a sharp projection in a groove on the outer surface of a structure to be locked.

Fig. 6 is a second schematic view of a sharp projection in a groove on the outer surface of the structure to be locked.

Fig. 7 is a third schematic view of a sharp projection in a groove on the outer surface of the structure to be locked.

Description of reference numerals: 1-set screw, 11-nut, 12-first screw, 13-polished rod section, 14-second screw; 2-structural gasket, 21-thread hole groove, 22-cylindrical inner cavity; 3-a first structure body to be locked, and 4-a second structure body to be locked.

Detailed Description

The present invention will be further explained with reference to the accompanying drawings.

The utility model discloses a locking mechanism is including the holding screw 1 and the structural gasket 2 that the cooperation was used.

As shown in fig. 1, the set screw 1 includes a nut 11, a first screw 12, a polish rod 13 and a second screw 14 connected in sequence; the nut 11 is used for an external operation interface; the screw 12 is provided with an external thread matched with the threaded hole of the structure to be locked and used for restraining the position of the set screw; the second screw 14 is provided with an external thread. The diameter of the polish rod 13 is smaller than the major diameter of the thread of the first screw 12; the major diameter of the thread of the second screw 14 is smaller than that of the first screw 12.

As shown in fig. 2, the structural gasket 2 is a cylindrical structure, a threaded hole groove 21 is axially formed along the cylindrical structure, the internal thread of the threaded hole groove 21 is matched with the external thread of the second screw 14 of the set screw 1, a cylindrical inner cavity 22 capable of accommodating the second screw 14 is arranged below the threaded hole groove 21, the diameter of the cylindrical inner cavity 22 is greater than that of the threaded hole groove 21, and the axial length of the cylindrical inner cavity 22 is greater than that of the second screw 14; the material of the structural gasket 2 can be selected from softer metals such as copper sheets and aluminum sheets; the material of the structural backing 2 may also be plastic sheet such as teflon.

Before use, the structural gasket 2 is detachably sleeved on the second screw 14 and the polished rod 13 of the set screw 1, so that the locking mechanism is assembled; as shown in fig. 3, when locking is required, the locking mechanism of the present invention is screwed into the threaded hole of the first structure to be locked 3, and the position of the set screw 1 can be adjusted by the cooperation of the first screw 12 and the threaded hole of the first structure to be locked 3, so that the structural gasket 2 is pressed by the set screw 1 and embedded into the matching threads of the first structure to be locked 3 and the second structure to be locked 4, thereby achieving locking; when the unlocking is needed, the set screw 1 is screwed out to enable the set screw 1 to be separated, and the structural gasket 2 can be taken out while the set screw 1 is separated, so that the unlocking is realized.

As shown in fig. 4, there is no matching thread between the first structure to be locked 3 and the second structure to be locked 4, and only the second structure to be locked 4 has a part of relatively sharp convex structure as shown in fig. 5, 6 and 7 (the convex structure may be a sharp arc, a sharp stripe, a discrete sharp point, etc.); the whole of the convex structure can be lower than the outer surface of the structure II 4 to be locked and can also be higher than the outer surface of the structure II 4 to be locked; use holding screw 1 to press structure gasket 2 to sharp-pointed protruding structure realization locking and corresponding unblock, can improve by a wide margin and treat locking structure one 3 and treat locking structure two 4's cooperation precision (no screw thread cooperation structure), further expanded the utility model discloses an application scope, here no longer give unnecessary details.

Claims

1. A locking mechanism comprising a set screw; the method is characterized in that:

the set screw (1) comprises a screw cap (11), a first screw rod (12), a polish rod (13) and a second screw rod (14) which are connected in sequence; the first screw (12) is matched with a threaded hole on the structure body to be locked; the diameter of the polish rod (13) is smaller than the major diameter of the thread of the first screw (12); the major diameter of the thread of the second screw (14) is smaller than that of the thread of the first screw (12);

also comprises a structural gasket (2); the structural gasket (2) is integrally cylindrical, and has an opening at the upper end and a closed lower end; the structural gasket (2) is provided with a thread hole groove (21) and a cylindrical inner cavity (22) capable of accommodating the second screw (14) from top to bottom in sequence along the axial direction; the internal thread of the thread hole groove (21) is matched with the external thread of the second screw rod (14); the axial length of the cylindrical inner cavity (22) is greater than that of the second screw (14);

the structural gasket (2) is sleeved outside the set screw (1) and is positioned at the polished rod (13) and the second screw (14);

the structural gasket (2) is made of plastic, copper or aluminum.

2. The latch mechanism of claim 1, wherein: the thickness of the bottom of the structural gasket (2) is larger than the depth of the thread to be pressed in.

3. The latch mechanism of claim 1, wherein: the structural gasket (2) is made of polytetrafluoroethylene.