CN110065902A - Muff-coupling trapezoidal screw rod anti-blocking structure - Google Patents

Abstract

The invention discloses an anti-blocking structure for a socketed trapezoidal lead screw, which comprises a first-level trapezoidal lead screw, a copper nut is arranged on the first-level trapezoidal lead screw jacket, the copper nut is threadedly connected with the first-level trapezoidal lead screw, and the first-level trapezoidal lead screw jacket is provided with a copper nut. There is a secondary lead screw, the bottom end of the secondary lead screw is in contact with the copper nut through the shaft sleeve, the end face of the copper nut facing the primary trapezoidal lead screw is provided with a stepped surface, and the end surface of the primary trapezoidal lead screw is provided with a mutual fitting with it. The end face of the first-level trapezoidal screw rod is provided with a stepped surface that can be fitted with each other, and the end surfaces of the first-stage trapezoidal screw rod and the copper nut close to the stepped surface are provided with several grooves, and the grooves radially penetrate , the depth of the groove is the same as the height of the step surface, and the size of the groove opening is larger than that of the bottom. The invention can effectively avoid the jamming of the socket screw rods, reduce the friction between the screw rods, and thus increase the life of the screw rods.

Description

Socketed trapezoidal screw anti-blocking structure

technical field

The invention relates to the technical field of jacking and hoisting equipment, in particular to an anti-blocking structure for socketed trapezoidal screw rods.

Background technique

The existing socketed trapezoidal lead screw is mostly blocked naturally without protective measures, and the lead screw is rotated by the trapezoidal thread to transmit torque. The nut on the top is prone to jam due to excessive transmission torque. Therefore, there is an urgent need for a locked-rotor structure that can transmit torque more reasonably, so that the trapezoidal thread will not be stuck due to excessive torque, so that the nut cannot be withdrawn.

SUMMARY OF THE INVENTION

The technical problem to be solved by the present invention is to provide an anti-blocking structure for the socketed trapezoidal screw, which can effectively avoid the blocking of the socketed screw, reduce the friction between the screws, and thus increase the life of the screw.

The technical scheme adopted by the present invention is as follows: it comprises a first-stage trapezoidal screw, the outer casing of the first-stage trapezoidal screw is provided with a copper nut, the copper nut is threadedly connected with the first-stage trapezoidal screw, and the outer casing of the first-stage trapezoidal screw is provided with a secondary wire The bottom end of the secondary screw rod is abutted against the copper nut through the shaft sleeve. The end face of the first-stage trapezoidal screw rod is provided with a stepped surface that can be fitted with each other. The end face of the first-stage trapezoidal screw rod and the copper nut close to the stepped face is provided with several grooves. The grooves run radially through, and the groove depth With the same height of the step surface, the size of the groove opening is larger than that of the bottom.

Preferably, the outer casing of the primary trapezoidal screw is provided with an outer tube.

Preferably, the end of the outer tube is provided with a guide sleeve for fixing the end of the first-stage trapezoidal screw.

Preferably, a base is provided on the bottom end face of the copper nut.

Preferably, the shaft sleeve is sleeved on the copper nut.

Preferably, several grooves are equally spaced on the end surfaces of the first-stage trapezoidal screw rod and the copper nut close to the stepped surface.

The invention has the advantages of the trapezoidal lead screw anti-blocking structure, and the advantages are as follows: the copper nut is used as the interlocking surface formed between the anti-blocking mechanism and the first-level trapezoidal lead screw, which not only avoids the blocking phenomenon, but also The efficiency of transmitting torque from the primary trapezoidal lead screw to the secondary lead screw is greatly increased, and the hard friction is greatly reduced. The lead screw adopts trapezoidal lead screw, and the trapezoidal lead screw has a certain degree of self-locking; The groove makes the copper nut play a buffer role when it collides with the stepped surface of the first-stage trapezoidal screw. There are more than one grooves. The size of the groove gradually decreases. If the groove closest to the step surface is completely closed, the following grooves can continue to play a buffer role. In addition, the size of the groove opening is larger than the bottom size, making the groove an inverted trapezoid shape. This is similar to a dike, greatly enhancing the resistance to impact or extrusion.

Description of drawings

Figure 1 is a schematic sectional view of the structure of the present invention.

FIG. 2 is a schematic diagram of the locked rotor surface in FIG. 1 .

Among them, 1. First-level trapezoidal screw, 2. Copper nut, 3. Second-level screw, 4. Step surface, 5. Outer tube, 6. Guide sleeve, 7. Shaft sleeve, 8. Extension tube, 9. Casing, 10. Groove.

Detailed ways

The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

As shown in FIG. 1 , the present invention provides an anti-blocking structure for a socketed trapezoidal lead screw, which includes a first-level trapezoidal lead screw 1, a copper nut 2 on the outer casing of the first-level trapezoidal lead screw 1, and the copper nut 2 and the first-level trapezoidal lead screw 1 Threaded connection, the rotation of the primary trapezoidal screw 1 drives the copper nut 2 to move up and down along the primary trapezoidal screw 1. The outer casing of the primary trapezoidal screw 1 is provided with a secondary screw 3, and the bottom end of the secondary screw 3 passes through the shaft. The sleeve 7 is in contact with the copper nut 2. As shown in Figure 2, the copper nut 2 is provided with a step surface 4 on the end face of the first-stage trapezoidal screw 1, and the end face of the first-stage trapezoidal screw 1 is provided with a step that can be fitted with each other. Surface 4, when the first-level trapezoidal screw 1 and the copper nut 2 reach the limit position, the stepped surface of the first-level trapezoidal screw 1 and the stepped surface 4 of the copper nut 2 overlap each other, thereby realizing the torque transmission effect.

There are several grooves 10 on the end surfaces of the first-stage trapezoidal screw 1 and the copper nut 2 close to the step surface 4. The grooves 10 run through radially, the depth of the groove 10 is the same as the height of the step surface, and the opening size of the groove 10 is larger than the bottom , when the two stepped surfaces 4 collide, the groove 10 can effectively buffer the impact force on the stepped surface 4, reduce the deformation of the stepped surface 4, and finally reduce the torsional impact force of the copper nut 2 and the first-stage trapezoidal screw 1, thereby improving the the lifespan of both.

The bottom end face of the copper nut 2 is provided with a base, the shaft sleeve 7 is sleeved on the copper nut 2, and the base supports the shaft sleeve 7. When the base moves up with the copper nut 2, one end of the shaft sleeve is pressed against the copper nut, and the other end is pressed against the copper nut. At the end of the secondary screw rod, the shaft sleeve also moves upwards, thereby pushing the secondary screw rod 3 to also move upward. 3 Lift up.

The outer casing of the primary trapezoidal screw 1 is provided with an outer tube 5, and the end of the outer tube 5 is provided with a guide sleeve 6, which is used to fix the end of the primary trapezoidal screw 1, so that the primary trapezoidal screw 1 can rotate in the guide sleeve 6 , and protect the primary trapezoidal screw 1 to prevent the invasion of foreign objects. Similarly, the outer casing of the secondary screw 3 is provided with a sleeve 9 .

In addition, according to the actual situation, when the stepped surface 4 of the first-stage trapezoidal screw 1 and the stepped surface 4 of the copper nut 2 are in contact with each other, the contact area of the two is increased, or the copper nut 2 and the first-stage trapezoidal screw 1 themselves use different materials, or The copper nut 2 and the stepped surface 4 of the first-stage trapezoidal screw 1 are coated with a layer of material and the like.

The preferred embodiments of the present invention have been described above, but should not be construed as limiting the claims. The present invention is not limited to the above embodiments, and its specific structure is allowed to be changed, and all changes made within the protection scope of the independent claim of the present invention are all within the protection scope of the present invention.

Claims (6)

1. being used for the Anti-blocking structure of jacking device, which is characterized in that it includes level-one trapezoidal screw, is arranged with outside level-one trapezoidal screw Copper nut, copper nut are threadedly coupled with level-one trapezoidal screw, and second level screw rod, second level screw rod bottom end are arranged with outside level-one trapezoidal screw It is offseted by axle sleeve and copper nut, copper nut is equipped with step surface, the end of level-one trapezoidal screw towards the end face of level-one trapezoidal screw Face is equipped with the step surface that can be mutually fitted into therewith, and level-one trapezoidal screw and copper nut are equipped with several on the end face of step surface A groove, groove extend radially through, and for trench depth with step surface height, groove opening size is bigger than bottom.

2. the Anti-blocking structure according to claim 1 for jacking device, it is characterised in that: be arranged with outside level-one trapezoidal screw Outer tube.

3. the Anti-blocking structure according to claim 1 for jacking device, it is characterised in that: outer tube end is equipped with guide sleeve, For fixing level-one trapezoidal screw end.

4. the Anti-blocking structure according to claim 1 for jacking device, it is characterised in that: copper nut bottom end end face is equipped with Pedestal.

5. the Anti-blocking structure according to claim 1 for jacking device, it is characterised in that: axle sleeve is sheathed on copper nut.

6. the Anti-blocking structure according to claim 1 for jacking device, it is characterised in that: several grooves are equidistantly distributed In level-one trapezoidal screw and copper nut on the end face of step surface.