Screw rod safety protection mechanism

Abstract

The utility model provides a lead screw safety protection mechanism. The lead screw safety protection mechanism comprises a lead screw body, a main nut, an auxiliary nut, a connecting piece and a displacement detection assembly. The main nut and the auxiliary nut are both in threaded connection with the lead screw body, and the pitch of the auxiliary nut is larger than that of the main nut. A gap is reserved between the main nut and the auxiliary nut, one end of the connecting piece is fixedly connected with the main nut, and the other end of the connecting piece is movably connected with the auxiliary nut. The displacement detection assembly is arranged between the main nut and the auxiliary nut. The utility model has the advantages that the displacement detection component can be used for detecting the displacement of the main nut caused by abrasion in real time, and the main nut can be replaced in time according to the detected displacement, so that the cutting component can be prevented from falling off due to excessive abrasion of the main nut, and the use safety can be greatly improved.

Description

Technical field

[0001] The utility model relates to the technical field of lifting devices, in particular to a screw rod safety protection mechanism. [Background Technology]

[0002] At present, multi-wire cutting machines using diamond wires have been used in stone cutting, such as a new type of downward-pressed diamond wire multi-wire cutting machine and multi-wire cutting system disclosed in the Chinese utility model patent application number CN202223148330.4, which includes a bracket and a cutting assembly, wherein the bracket includes two column assemblies arranged at intervals in the horizontal direction, and the upper ends of the two column assemblies are connected together by a cross bar component to form a frame structure, and the cutting assembly includes two movable plates arranged on both sides in the horizontal direction, and each movable plate is connected to the inner side of the column assembly located on its corresponding horizontal side for sliding up and down; the multi-wire cutting machine also includes a lifting device, and each movable plate is equipped with two upper and lower spaced-apart, longitudinally extending and rotatable main wheels, and each movable plate is provided with a support seat on the front and rear sides; a retractable wire system is provided on the back of each movable plate, and the diamond wire is repeatedly wound around the four main wheels from the retractable wire system at one end and is connected to the retractable wire system at the other end.

[0003] However, the lifting mechanisms of existing multi-wire cutting machines all utilize a screw and nut. These nuts wear out during operation. If not promptly replaced after reaching a certain level of wear, the entire cutting assembly may fall, posing a safety hazard. In light of these issues, the inventors conducted in-depth research, leading to the present invention. [Utility Model Content]

[0004] The technical problem to be solved by the present invention is to provide a screw safety protection mechanism to solve the problem that the existing lifting devices are all realized by the combination of screws and nuts, and the nuts will wear during the operation. When they are worn to a certain extent, if they are not replaced in time, it may cause the entire cutting assembly to fall, posing a safety hazard.

[0005] The utility model is implemented as follows: a screw rod safety protection mechanism includes a screw rod body, a main nut, a secondary nut, a connecting piece and a displacement detection component;

[0006] The main nut and the secondary nut are both threadedly connected to the screw body, and the pitch of the secondary nut is greater than the pitch of the main nut; a distance is left between the main nut and the secondary nut, one end of the connecting piece is fixedly connected to the main nut, and the other end of the connecting piece is movably connected to the secondary nut; the displacement detection component is arranged between the main nut and the secondary nut.

[0007] Furthermore, the main nut is located above the secondary nut.

[0008] Furthermore, the displacement detection assembly includes a displacement sensor and a fixing plate, the displacement sensor is connected to the side wall of the main nut, the fixing plate is connected to the side wall of the secondary nut, and the displacement sensor is located directly above the fixing plate.

[0009] Furthermore, the connecting member includes a connecting rod and a tightening nut; a threaded hole is formed at the bottom of the main nut at a position corresponding to the connecting rod, a screw segment is formed on the upper part of the connecting rod, the screw segment is threadedly connected to the main nut, the tightening nut is threadedly connected to the screw segment, and the tightening nut is tightened to the bottom of the main nut; a movable hole is opened on the secondary nut, and the lower part of the connecting rod is inserted into the movable hole.

[0010] Furthermore, the movable hole passes through the secondary nut from top to bottom, the lower part of the connecting rod passes through the secondary nut, and a stopper is provided at the lower end of the connecting rod.

[0011] Furthermore, a hexagonal countersunk hole is formed at the bottom of the stopping portion.

[0012] Furthermore, 6-10 connecting pieces are arranged at equal intervals around the circumferential direction between the main nut and the auxiliary nut.

[0013] Furthermore, the screw rod body is a trapezoidal screw rod, and the main nut is a trapezoidal copper nut.

[0014] Furthermore, a connecting convex ring is formed on the upper end of the main nut in a circumferential direction, and a plurality of locking parts are provided on the connecting convex ring.

[0015] Furthermore, it also includes a driving component, which is connected to one end of the screw body.

[0016] By adopting the technical solution of the utility model, at least the following beneficial effects are achieved: by simultaneously threading a main nut and a secondary nut on the screw body, and the pitch of the secondary nut is greater than the pitch of the main nut, and the main nut is fixedly connected to one end of the connecting piece, and the secondary nut is movably connected to the other end of the connecting piece, and a displacement detection component is set between the main nut and the secondary nut, so that during the specific working process, the displacement detection component can be used to detect the displacement of the main nut caused by wear in real time, and the main nut can be replaced in time according to the detected displacement, thereby avoiding the cutting component from falling off due to excessive wear of the main nut, which can greatly improve the safety of use.

Brief Description of the Drawings

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0018] Figure 1 This is the overall structural diagram of a screw safety protection mechanism of the utility model;

[0019] Figure 2 This is a partial enlarged view of a screw safety protection mechanism at the main nut and main nut position of the utility model;

[0020] Figure 3 It is a structural diagram of the main nut in the utility model;

[0021] Figure 4 This is a structural diagram of the auxiliary nut in the utility model;

[0022] Figure 5 It is a structural diagram of the connecting piece in the utility model.

[0023] Description of reference numerals:

[0024] Screw safety protection mechanism 100;

[0025] Screw body 1;

[0026] Main nut 2, threaded hole 21, connecting convex ring 22;

[0027] Secondary nut 3, movable hole 31;

[0028] Connecting member 4, connecting rod 41, screw segment 411, stopper 412, hexagon socket countersunk hole 413, and tightening nut 42;

[0029] Displacement detection assembly 5, displacement sensor 51, fixing plate 52, first connecting frame 53, second connecting frame 54;

[0030] Locking part 6;

[0031] Drive assembly 7. [Specific implementation method]

[0032] In order to better understand the technical solution of the present invention, the technical solution of the present invention will be described in detail below with reference to the accompanying drawings and specific implementation methods.

[0033] It should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "back," "left," "right," "vertical," "horizontal," "top," "bottom," "inside," "outside," and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended only to facilitate the description of these embodiments and simplify the description. They do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed, or operate in a specific orientation. In addition, the terms "first," "second," and the like are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly specifying the number of the technical features indicated. Therefore, features defined as "first," "second," and the like may explicitly or implicitly include one or more of such features.

[0034] See also Figures 1 to 5 As shown, the utility model provides a screw safety protection mechanism 100, which includes a screw body 1, a main nut 2, a secondary nut 3, a connecting piece 4 and a displacement detection component 5;

[0035] The main nut 2 and the auxiliary nut 3 are both screwed to the screw body 1, and the pitch of the auxiliary nut 3 is greater than that of the main nut 2. Since the pitch of the auxiliary nut 3 is greater than that of the main nut 2, the main nut 2 can be tightly screwed to the screw body 1 and drive the cutting assembly to move up and down, while the auxiliary nut 3 can also be screwed to the screw body 1, but the auxiliary nut 3 and the screw body 1 are in a loose screw connection state. Therefore, during the specific operation, the main nut 2 will wear due to friction with the screw body 1, while the auxiliary nut 3 will not wear.

[0036] There is a distance between the main nut 2 and the secondary nut 3, one end of the connecting piece 4 is fixedly connected to the main nut 2, and the other end of the connecting piece 4 is movably connected to the secondary nut 3; the displacement detection component 5 is arranged between the main nut 2 and the secondary nut 3. Since in actual operation, when the main nut 2 is worn, the main nut 2 will move slightly downward to reduce the distance between the main nut 2 and the secondary nut 3. Therefore, by arranging the displacement detection component 5 between the main nut 2 and the secondary nut 3, the displacement detection component 5 can be used to detect the displacement generated by the main nut 2.

[0037] The utility model simultaneously screws a main nut 2 and a secondary nut 3 on a screw rod body 1, and the pitch of the secondary nut 3 is greater than the pitch of the main nut 2, and the main nut 2 is fixedly connected to one end of a connecting piece 4, and the secondary nut 3 is movably connected to the other end of the connecting piece 4, and a displacement detection component 5 is provided between the main nut 2 and the secondary nut 3, so that during the specific working process, the displacement detection component 5 can be used to detect the displacement of the main nut 2 caused by wear in real time, and the main nut 2 can be replaced in time according to the detected displacement, thereby preventing the cutting component from falling off due to excessive wear of the main nut 2, and greatly improving the safety of use.

[0038] As a specific embodiment of the present invention, in order to better detect the displacement of the main nut 2, the main nut 2 is located above the secondary nut 3. Of course, the present invention is not limited to this, and in other embodiments, the secondary nut 3 can also be designed to be located above the main nut 2.

[0039] In some embodiments of the present invention, please refer to Figure 2As shown, the displacement detection assembly 5 includes a displacement sensor 51 and a fixing plate 52. The displacement sensor 51 is connected to the side wall of the main nut 2, and the fixing plate 52 is connected to the side wall of the secondary nut 3. The displacement sensor 51 is located directly above the fixing plate 52. In a specific implementation of the present invention, the displacement sensor 51 can be directly fixedly mounted on the side wall of the main nut 2, and the fixing plate 52 can be directly fixedly mounted on the side wall of the secondary nut 3; or the displacement sensor 51 can be connected to the side wall of the main nut 2 through a first connecting frame 53, and the fixing plate 52 can be connected to the side wall of the secondary nut 3 through a second connecting frame 54.

[0040] When the displacement detection component 5 of the present invention is used in practice, when the main nut 2 and the secondary nut 3 are just installed on the screw body 1, the distance between the displacement sensor 51 and the fixed plate 52 is fixed, and the distance between the displacement sensor 51 and the fixed plate 52 can be detected in real time by the displacement sensor 51; in the process of the main nut 2 and the screw body 1 working together, when the main nut 2 is worn due to friction, the main nut 2 will be displaced downward due to the increase in the tooth pitch. At this time, the distance between the displacement sensor 51 and the fixed plate 52 will become smaller; when the displacement sensor 51 detects that the distance between the displacement sensor 51 and the fixed plate 52 reaches a certain set value, it means that the main nut 2 has been severely worn. At this time, the displacement sensor 51 can be used to trigger an alarm to prompt the staff to replace the main nut 2 in time to ensure safe use.

[0041] In some embodiments of the present invention, please refer to Figure 5 As shown, the connecting member 4 includes a connecting rod 41 and a tightening nut 42; a threaded hole 21 is formed at the bottom of the main nut 2 at a position corresponding to the connecting rod 41, and a screw segment 411 is formed on the upper part of the connecting rod 41, and the screw segment 411 is threadedly connected to the main nut 2, and the tightening nut 42 is threadedly connected to the screw segment 411, and the tightening nut 42 is tightened to the bottom of the main nut 2 to achieve a reliable connection between the upper part of the connecting rod 41 and the main nut 2; a movable hole 31 is provided on the secondary nut 3, and the lower part of the connecting rod 41 is inserted into the movable hole 31. Since the lower part of the connecting rod 41 and the secondary nut 3 are movably connected up and down, the main nut 2 can be displaced downward after wear.

[0042] Furthermore, the movable hole 31 passes through the secondary nut 3 from top to bottom, the lower part of the connecting rod 41 passes through the secondary nut 3, and a stopper 412 is provided at the lower end of the connecting rod 41. The stopper 412 can limit the lower end of the connecting rod 41, so that the lower end of the connecting rod 41 cannot enter the movable hole 31.

[0043] Furthermore, a hexagonal countersunk hole 413 is formed at the bottom of the stop portion 412 to facilitate the operation of rotating the connecting rod 41 with the help of a tool so that the upper portion of the connecting rod 41 is screwed together with the main nut 2.

[0044] In some embodiments of the present invention, 6-10 connecting members 4 are arranged at equal intervals around the circumferential direction between the main nut 2 and the secondary nut 3 to better connect the main nut 2 and the secondary nut 3 together and ensure that the main nut 2 can move downward more smoothly after wear.

[0045] As a preferred embodiment of the present invention, the screw body 1 is a trapezoidal screw, the main nut 2 is a trapezoidal copper nut, and at the same time, the secondary nut 3 can also adopt a trapezoidal copper nut. It should be noted that the trapezoidal screw and trapezoidal copper nut in the present invention specifically refer to the screw body 1 and the main nut 2 (secondary nut 3) on which the cross-section of the thread is a trapezoidal structure.

[0046] Because copper nuts have the advantages of being not easy to rust, corrosion-resistant, and easy to conduct heat, the nuts of existing lifting devices are usually made of copper nuts. However, copper nuts are easy to wear during use. The technical solution of the present invention can well realize real-time detection of the wear of copper nuts, and when the wear reaches a certain extent, the displacement sensor 51 is used to trigger an alarm, so that the staff can replace the main nut 2 in time to ensure safe use.

[0047] In some embodiments of the present invention, a connecting protrusion 22 is formed around the circumferential direction at the upper end of the main nut 2, and a plurality of locking parts 6 are provided on the connecting protrusion 22, so that the main nut 2 can be locked and connected with other components through the connecting protrusion 22 by using the locking parts 6; in the specific implementation of the present invention, the locking parts 6 can be bolts.

[0048] In some embodiments of the present invention, the screw safety protection mechanism 100 also includes a drive component 7, which is connected to one end of the screw body 1, so that the drive component 7 is used to drive the screw body 1 to rotate. During the rotation of the screw body 1, the main nut 2 and the secondary nut 3 can be driven to move along the vertical direction, and then the main nut 2 can be used to drive the cutting component to rise and fall; the drive component 7 can specifically adopt a reduction motor.

[0049] Although the specific implementation methods of the present invention are described above, those skilled in the art should understand that the specific embodiments described are merely illustrative and are not intended to limit the scope of the present invention. Equivalent modifications and changes made by those skilled in the art in accordance with the spirit of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A screw safety protection mechanism, characterized in that: It includes a screw body, a main nut, a secondary nut, a connecting piece and a displacement detection component; The main nut and the secondary nut are both threadedly connected to the screw body, and the pitch of the secondary nut is greater than the pitch of the main nut; a distance is left between the main nut and the secondary nut, one end of the connecting piece is fixedly connected to the main nut, and the other end of the connecting piece is movably connected to the secondary nut; the displacement detection component is arranged between the main nut and the secondary nut.

2. A screw rod safety protection mechanism according to claim 1, characterized in that: The main nut is located above the secondary nut.

3. The screw rod safety protection mechanism according to claim 1, characterized in that: The displacement detection assembly includes a displacement sensor and a fixing plate. The displacement sensor is connected to the side wall of the main nut, and the fixing plate is connected to the side wall of the secondary nut. The displacement sensor is located directly above the fixing plate.

4. A screw rod safety protection mechanism according to claim 2, characterized in that: The connecting piece includes a connecting rod and a tightening nut; a threaded hole is formed at the bottom of the main nut at a position corresponding to the connecting rod, and a screw segment is formed on the upper part of the connecting rod, the screw segment is threadedly connected to the main nut, the tightening nut is threadedly connected to the screw segment, and the tightening nut is tightened to the bottom of the main nut; a movable hole is opened on the secondary nut, and the lower part of the connecting rod is inserted into the movable hole.

5. A screw rod safety protection mechanism according to claim 4, characterized in that: The movable hole passes through the secondary nut from top to bottom, the lower part of the connecting rod passes through the secondary nut, and the lower end of the connecting rod is provided with a stopping part.

6. A screw rod safety protection mechanism according to claim 5, characterized in that: The bottom of the stopping portion is formed with a hexagonal countersunk hole.

7. The screw rod safety protection mechanism according to claim 1, characterized in that: 6-10 connecting pieces are arranged between the main nut and the auxiliary nut at equal intervals around the circumferential direction.

8. The screw rod safety protection mechanism according to claim 1, characterized in that: The screw rod body is a trapezoidal screw rod, and the main nut is a trapezoidal copper nut.

9. The screw rod safety protection mechanism according to claim 1, characterized in that: A connecting convex ring is formed on the upper end of the main nut in a circumferential direction, and a plurality of locking parts are provided on the connecting convex ring.

10. A screw rod safety protection mechanism according to any one of claims 1 to 9, characterized in that: It also includes a driving assembly, which is connected to one end of the screw body.

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