CN204253552U - Adjustable locking screw - Google Patents

Abstract

The utility model relates to the field of locking equipment, in particular to an adjustable locking screw rod. The adjustable locking screw includes a positioning screw. The positioning screw includes a large end and a small end that are integrally formed. The small end is provided with an external thread. The large end of the positioning screw is provided with a boss, and the end of the boss is provided with a hemispherical groove. ; It also includes the ball screw and the screw connecting piece, the screw connecting piece is provided with a through hole, one hole of the through hole is a spherical hole, and the minimum diameter of the through hole is larger than the screw diameter of the ball screw, smaller than the diameter of the ball head, spherical The diameter of the orifice and the diameter of the groove are consistent with the diameter of the ball head of the ball screw. The screw connector is connected with the boss, and the spherical hole coincides with the center of the groove. The mouth is a sliding fit, and the threaded rod of the ball screw passes through the through hole. The adjustable locking screw can automatically adjust the verticality between the ball screw and the horizontal plane, so that the top surface of the pressure plate is in contact with the lower end of the locking nut, thereby enhancing the clamping rigidity and stability of the system.

Description

Adjustable locking screw

technical field

The utility model relates to the field of locking equipment, in particular to an adjustable locking screw rod.

Background technique

Screw is a commonly used part, which is widely used in machinery and is often used as connecting, locking, positioning and other components. At present, in the locking connection shown in Figure 1, due to the manufacturing error of the clamped workpiece 1 in the previous process, and the height difference between the clamped workpiece 1 and the support nail 3, when using the clamping plate 4 to clamp When tightening, the pressure plate 4 will be inclined, and the locking screw 5 is in the vertical direction, resulting in an inclination angle between the top surface of the pressure plate 4 and the lower end surface of the lock nut 6, so that the top surface of the pressure plate 4 and the lock nut 6 Due to insufficient contact and small contact surface, the clamping rigidity and stability of the whole system are poor.

Utility model content

The technical problem to be solved by the utility model is to provide an adjustable locking screw that can enhance the clamping rigidity and stability of the system.

The technical solution adopted by the utility model to solve the technical problem is: the adjustable locking screw includes a positioning screw, the positioning screw includes a large end and a small end integrally formed, the small end is provided with an external thread, and the positioning The large end surface of the screw is provided with a boss, and the end surface of the boss is provided with a hemispherical groove; it also includes a ball screw and a screw connecting piece, and the screw connecting piece is provided with a through hole, and a hole of the through hole The mouth is a spherical orifice formed by a spherical surface, and the minimum diameter of the through hole is larger than the screw diameter of the ball screw, and smaller than the ball head diameter of the ball screw. The diameter of the ball head is the same, the screw connecting piece is connected with the boss as a whole, and the spherical hole coincides with the spherical center of the groove, and the ball head of the ball screw is slidably fitted with the groove and the spherical hole respectively, and The screw rod of the ball screw passes through the through hole.

Further, the boss is cylindrical.

Further, the boss is provided with external threads, the through hole is provided with internal threads, and the screw connecting member is threadedly connected with the boss.

Further, both ends of the screw connector are regular hexagons.

The beneficial effects of the utility model are: the positioning screw can cooperate with the threaded hole on the workbench to realize the functions of positioning and connection; the screw connecting piece fixes the ball head of the ball screw in the cavity surrounded by the spherical hole and the groove In this case, since the diameter of the through hole of the screw connector is larger than the diameter of the screw including the ball screw, and the ball head of the ball screw is slidingly fitted with the groove and the spherical hole respectively, the screw of the ball screw can swing within a certain range. When locking the connection, the verticality between the ball screw and the horizontal plane can be automatically adjusted, so that the top surface of the pressure plate and the lower end surface of the lock nut change from line contact to surface contact, which enhances the clamping rigidity and stability of the system.

Description of drawings

Fig. 1 is a schematic diagram of a locking connection in the prior art;

Fig. 2 is a structural schematic diagram of the positioning screw of the adjustable locking screw;

Fig. 3 is a structural schematic diagram of the screw connector of the adjustable locking screw;

Fig. 4 is a schematic diagram of the ball screw structure of the adjustable locking screw;

Fig. 5 is a schematic diagram of the swing of the ball screw of the adjustable locking screw;

Fig. 6 is a schematic diagram of screw connection between the screw connecting piece and the boss.

Detailed ways

Below in conjunction with accompanying drawing and embodiment the utility model is further described.

As shown in Fig. 2, Fig. 3, Fig. 4, and Fig. 5, the adjustable locking screw of the present invention includes a positioning screw 11, and the positioning screw 11 includes a large end and a small end integrally formed, and the small end is provided with There are external threads, the large end of the positioning screw 11 is provided with a boss 111, and the end of the boss 111 is provided with a hemispherical groove 112; it also includes a ball screw 12 and a screw connector 13, and the screw is connected The member 13 is provided with a through hole 131, one hole of the through hole 131 is a spherical hole 132 formed by a spherical surface, and the minimum diameter of the through hole 131 is larger than the screw diameter of the ball screw 12 and smaller than that of the ball screw 12. The diameter of the ball head, the spherical diameter of the spherical hole 132 and the diameter of the groove 112 are consistent with the diameter of the ball head screw 12, the screw connector 13 is connected with the boss 111 as a whole, and the spherical hole 132 is connected with the concave The center of the ball of the groove 112 coincides, the ball head of the ball screw 12 is slidingly matched with the groove 112 and the spherical hole 132 respectively, and the screw of the ball screw 12 passes through the through hole 131 .

The positioning screw 11 can cooperate with the threaded hole on the workbench to realize the functions of positioning and connection; the screw connector 13 fixes the ball head of the ball screw 12 in the spherical cavity surrounded by the spherical hole 132 and the groove 112, Since the diameter of the through hole of the screw connector 13 is larger than the diameter of the screw including the ball screw 12, and the ball head of the ball screw 12 is respectively slidingly fitted with the groove 112 and the spherical hole 132, the screw of the ball screw 12 can be in a certain position. swing within the range. During the locking connection, the verticality between the ball screw 12 and the horizontal plane can be automatically adjusted, so that the top surface of the pressure plate 4 and the lower end surface of the lock nut 6 change from line contact to surface contact, thereby enhancing the clamping rigidity and stability of the system. The through hole can be a stepped hole formed by a straight hole with a larger diameter and a spherical hole with a smaller diameter as shown in Figure 3, or a straight hole with a smaller diameter and a spherical hole with a larger diameter as shown in Figure 6 combination structure.

The boss 111 can be in any shape, and for the convenience of connecting with the screw connector 13, the boss 111 is cylindrical.

The boss 111 is provided with external threads, the through hole 131 is provided with internal threads, and the screw connector 13 is fixedly connected with the boss 111 by threads. It is convenient and quick to connect directly through threads, and it is easy to process, as shown in Fig. 6, it can also be connected or welded with screws 8.

Both ends of the screw connector 13 are regular hexagons. The end face is a regular hexagon, which is convenient for tightening the thread. At the same time, the standard hexagonal nut can be directly used as a blank, and then drilled, processed spherical and threaded, with low cost and few processing procedures.

Claims (4)

1. Adjustable locking screw rod comprises positioning screw rod (11), and described positioning screw rod (11) comprises the large end and the small end of integral molding, and described small end is provided with external thread, it is characterized in that, described positioning screw rod ( 11) is provided with a boss (111) on the end face of the big end, and the end face of the boss (111) is provided with a hemispherical groove (112); it also includes a ball screw (12) and a screw connector (13), so The screw connector (13) is provided with a through hole (131), an aperture of the through hole (131) is a spherical aperture (132) formed by a spherical surface, and the minimum diameter of the through hole (131) is greater than The diameter of the screw of the ball screw (12) is less than the diameter of the ball of the ball screw (12). Consistently, the screw connector (13) is connected to the boss (111) as a whole, and the spherical hole (132) coincides with the spherical center of the groove (112), and the ball heads of the ball screw (12) are respectively Sliding fit with the groove (112) and the spherical orifice (132), and the screw rod of the ball screw (12) passes through the through hole (131). 2. The adjustable locking screw according to claim 1, characterized in that: the boss (111) is cylindrical. 3. The adjustable locking screw according to claim 2, characterized in that: the boss (111) is provided with external threads, the through hole (131) is provided with internal threads, and the screw connector (13 ) is threadedly connected with the boss (111). 4. The adjustable locking screw according to claim 3, characterized in that: both ends of the screw connecting piece (13) are regular hexagons.