Limiting self-sliding protection lead screw

Abstract

The utility model relates to the field of lead screws, in particular to a limiting self-sliding protection lead screw which comprises a lead screw body, the lead screw body comprises a threaded rod portion and smooth rod portions, the smooth rod portions are fixedly connected to the two sides of the threaded rod portion, and a nut pair body is connected to the outer portion of the threaded rod portion in a threaded mode. Reset mechanisms are symmetrically and slidably mounted on the outer portion of the lead screw body and located on the outer portion of the corresponding smooth rod part, mounting ring blocks are fixedly mounted on the sides, away from the nut pair body, of the reset mechanisms, and the mounting ring blocks and the lead screw body are connected through fixing mechanisms. According to the nut pair, the reset mechanism and the lead screw body can slide to the needed position and be fixed according to requirements through the fixing mechanism and the mounting ring block, meanwhile, when the nut pair body is damaged, the nut pair body can be detached and replaced conveniently, and through the reset mechanism, the nut pair body can be replaced conveniently. And the nut pair body is reset after moving to the outside of the smooth rod part and is in threaded connection with the threaded rod part again, so that subsequent continuous operation is facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of screw rods, in particular to a position-limiting self-sliding protective screw rod. Background Art

[0002] The lead screw is an ideal product for converting rotary motion into linear motion, or converting linear motion into rotary motion. The lead screw is the most commonly used transmission element in tool machinery and precision machinery. Its main function is to convert rotary motion into linear motion, or torque into axial repetitive force, while having the characteristics of high precision, reversibility and high efficiency.

[0003] The mechanism of the screw rod can refer to the utility model with authorization announcement number "CN 212959731U", which discloses "a limited self-sliding protective screw rod". Through the screw rod protection mechanism, when the nut moves to the limit position of the stroke, the nut can be caused to idle, thereby preventing the nut from continuing to move, protecting the screw rod, and solving the problem of damage or breakage caused by continued rotation of the screw rod at the limit position of the stroke. However, when the nut idles, it cannot be reset immediately, and when the nut is damaged, it is difficult to replace it quickly and conveniently. Utility Model Content

[0004] The utility model aims to solve the shortcomings in the prior art and proposes a position-limiting self-sliding protective screw rod.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A limited self-sliding protective screw comprises a screw body, wherein the screw body comprises a threaded rod portion and a smooth rod portion, both sides of the threaded rod portion are fixedly connected with the smooth rod portion, the outer thread of the threaded rod portion is threadedly connected with a nut replica body, a reset mechanism is symmetrically and slidably installed on the outside of the screw body and on the outer side of the corresponding smooth rod portion, and a mounting ring block is fixedly installed on the side of the reset mechanism away from the nut replica body, and the mounting ring block and the screw body are connected by a fixing mechanism.

[0007] In addition, a preferred structure is that the reset mechanism includes a fixed ring block, a reset ring block, a reset spring, and a limiting slide rod, the fixed ring block is located on the corresponding smooth rod portion and has a through hole, and the fixed ring block is close to one side of the nut replica body and has a limiting groove outside the through hole.

[0008] In addition, a preferred structure is that limiting slide grooves are horizontally opened around the fixed ring block and on one side of the limiting groove, and limiting slide rods are horizontally slidably installed in the limiting slide grooves, one end of the limiting slide rod passes through the limiting slide groove and extends out of the limiting groove to be connected to a reset ring block.

[0009] In addition, a preferred structure is that a plurality of reset springs are horizontally arranged at equal distances between the reset ring block and the limiting groove, one end of the reset spring is connected to the reset ring block, and the other end of the reset ring block is connected to the inner wall of the limiting groove.

[0010] In addition, a preferred structure is that the fixing mechanism includes a fixing bolt and a fixing nut, one end of the fixing bolt passes through the mounting ring block, and the fixing nut is rotatably mounted on the screw body.

[0011] In addition, a preferred structure is that the mounting ring block is provided with a through hole at the corresponding fixing mechanism, and the smooth rod portion of the screw body is provided with a slide groove through hole at the corresponding fixing mechanism.

[0012] The beneficial effects of the utility model are:

[0013] In the utility model, the fixing mechanism and the mounting ring block enable the reset mechanism and the screw rod body to slide to the required position and be fixed according to needs, and at the same time, it is convenient to disassemble and replace the nut replica body when it is damaged. The reset mechanism allows the nut replica body to be moved to the outside of the smooth rod part, where it is reset and re-threadedly connected with the threaded rod part, which is convenient for subsequent continuous operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a structural schematic diagram of a position-limiting self-sliding protection screw rod proposed by the utility model;

[0015] Figure 2 This is a schematic diagram of the disassembled structure of a position-limiting self-sliding protection screw rod proposed by the utility model;

[0016] Figure 3 This is a schematic diagram of the structure of the position A of a position-limiting self-sliding protection screw rod proposed by the utility model;

[0017] Figure 4 The utility model provides a schematic diagram of the disassembled structure of a reset mechanism, a mounting ring block and a fixing mechanism of a position-limiting self-sliding protection screw rod.

[0018] In the figure: 1 screw body, 11 threaded rod, 12 smooth rod, 13 slide groove through hole, 2 nut sub-body, 3 reset mechanism, 31 fixed ring block, 311 limiting groove, 32 reset ring block, 33 reset spring, 34 limiting slide rod, 4 mounting ring block, 41 through hole, 5 fixing mechanism, 51 fixing bolt, 52 fixing nut. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0020] Reference Figure 1-4 A limited self-sliding protection screw comprises a screw body 1, the screw body 1 comprises a threaded rod portion 11 and a smooth rod portion 12, both sides of the threaded rod portion 11 are fixedly connected with the smooth rod portion 12, the external threaded connection of the threaded rod portion 11 is connected with a nut replica body 2, a reset mechanism 3 is symmetrically slidably installed on the outside of the screw body 1 and located on the outside of the corresponding smooth rod portion 12, and a mounting ring block 4 is fixedly installed on the side of the reset mechanism 3 away from the nut replica body 2, and the mounting ring block 4 and the screw body 1 are connected by a fixing mechanism 5.

[0021] Among them, the reset mechanism 3 includes a fixed ring block 31, a reset ring block 32, a reset spring 33, and a limiting slide rod 34. The fixed ring block 31 is located at a corresponding smooth rod portion 12 and has a through hole, and the fixed ring block 31 is close to one side of the nut replica body 2 and is located outside the through hole and has a limiting groove 311.

[0022] At the same time, limiting sliding grooves are horizontally opened around the fixed ring block 31 and on one side of the limiting groove 311, and limiting sliding rods 34 are horizontally slidably installed in the limiting sliding grooves. One end of the limiting sliding rod 34 passes through the limiting sliding groove and extends out of the limiting groove 311 to be connected to the reset ring block 32.

[0023] In addition, a plurality of reset springs 33 are horizontally arranged at equal distances between the reset ring block 32 and the limiting groove 311 , one end of the reset spring 33 is connected to the reset ring block 32 , and the other end of the reset ring block 32 is connected to the inner wall of the limiting groove 311 .

[0024] Furthermore, the fixing mechanism 5 includes a fixing bolt 51 and a fixing nut 52. One end of the fixing bolt 51 passes through the mounting ring block 4, and the screw body 1 is rotatably installed with the fixing nut 52. The mounting ring block 4 is located at the corresponding fixing mechanism 5 and has a through hole 41, and the smooth rod portion 12 of the screw body 1 is located at the corresponding fixing mechanism 5 and has a slide groove hole 13.

[0025] In this embodiment, the nut replica body 2 is first threadedly installed on the outside of the screw body 1 and is located at the end of the threaded rod 11 and the outside of the smooth rod 12. Then, the two reset mechanisms 3 drive the corresponding mounting ring blocks 4 to slide symmetrically on the outside of the smooth rod 12 of the screw body 1. Then, the fixing nut of the fixing mechanism 5 is passed through the through hole 41 of the mounting ring block 4 and the slide groove hole 13 of the smooth rod 12, and the reset mechanism 3 is slid to the side where its reset ring block 32 is close to the nut replica body 2 and is not close to the nut pair. Then, the fixing nut 52 and the fixing bolt 51 are tightened to fix it.

[0026] Next, the screw body 1 is connected to the external forward and reverse drive motor through an external coupling, and then the forward and reverse drive motor drives the screw body 1 to rotate forward or reverse, so that the nut sub-body 2 is threadedly connected and driven to move along the threaded rod portion 11 of the screw body 1. When the forward and reverse drive motor drives the screw body 1 to rotate forward, the nut sub-body 2 is driven to move to one side.

[0027] When the nut replica body 2 moves to the end of the threaded rod 11 of the screw body 1, when the forward and reverse electric shocks continue to drive, the nut replica body 2 will break away from the outside of the threaded rod 11 and slide to the outside of the smooth rod 12, and contact and press with the fixed ring block 31 of the reset mechanism 3, so that the fixed ring block 31 drives the corresponding reset spring 33 to be squeezed into the limiting groove 311 of the fixed ring block 31, and the limiting slide rod 34 moves into the corresponding limiting limiting slide groove, and then the forward and reverse driving motors are stopped to operate. At this time, the nut replica body 2 stops moving, and the nut replica body 2 is located outside the smooth rod 12 of the corresponding screw body 1, thereby limiting the nut replica body 2 and protecting it at the same time, so that when the nut replica body 2 reaches the end of the threaded rod 11 of the screw body 1, it moves and moves to the outside of the smooth rod 12, and causes the threaded rod 11 of the screw body 1 to idle, thereby protecting the screw body 1.

[0028] Then, due to the action of the reset spring 33, the reset spring 33 performs a reaction force on the fixed ring block 31 while resetting, so that the fixed ring block 31 moves toward the threaded rod portion 11 of the screw body 1, and then the nut replica body 2 moves toward the threaded rod portion 11 of the screw body 1, and the nut replica body 2 is re-threadedly connected with the threaded rod portion 11, and then the forward and reverse driving motor is driven to drive the screw body 1 to reverse, so that the nut replica body 2 moves in the other direction, and the above actions are repeated.

[0029] When the nut replica body 2 is damaged, the fixing nut 52 and the fixing bolt 51 are loosened and removed, and then the reset mechanism 3 and the corresponding mounting ring block 4 are removed, so that the nut replica body 2 can be removed and replaced, and the operation process is relatively convenient.

[0030] In the utility model, the fixing mechanism 5 and the mounting ring block 4 enable the reset mechanism 3 and the screw body 1 to slide to the required position and be fixed according to needs, and at the same time, it is convenient to disassemble and replace the nut replica body 2 when it is damaged. The reset mechanism 3 allows the nut replica body 2 to be moved to the outside of the smooth rod portion 12 and then reset and re-threadedly connected with the threaded rod portion 11, which is convenient for subsequent continuous operation.

[0031] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A position-limiting self-sliding protective screw, comprising a screw body (1), characterized in that: The screw rod body (1) comprises a threaded rod portion (11) and a smooth rod portion (12), both sides of the threaded rod portion (11) are fixedly connected to the smooth rod portion (12), the outside of the threaded rod portion (11) is threadedly connected to the nut sub-body (2), a reset mechanism (3) is symmetrically slidably installed outside the screw rod body (1) and outside the corresponding smooth rod portion (12), and a mounting ring block (4) is fixedly installed on the side of the reset mechanism (3) away from the nut sub-body (2), and the mounting ring block (4) and the screw rod body (1) are connected via a fixing mechanism (5).

2. A position-limiting self-sliding protective screw rod according to claim 1, characterized in that: The reset mechanism (3) comprises a fixed ring block (31), a reset ring block (32), a reset spring (33), and a limit sliding rod (34); the fixed ring block (31) is located on a corresponding smooth rod portion (12) and is provided with a through hole; and the fixed ring block (31) is located on a side of the nut replica body (2) and is located outside the through hole and is provided with a limit groove (311).

3. A position-limiting self-sliding protection screw rod according to claim 2, characterized in that: Limiting sliding grooves are horizontally provided around the fixed ring block (31) and located on one side of the limiting groove (311), and limiting sliding rods (34) are horizontally slidably installed in the limiting sliding grooves, and one end of the limiting sliding rod (34) passes through the limiting sliding groove and extends out of the limiting groove (311) to be connected to the reset ring block (32).

4. A position-limiting self-sliding protective screw rod according to claim 3, characterized in that: A plurality of reset springs (33) are arranged horizontally and equidistantly between the reset ring block (32) and the limiting groove (311); one end of the reset spring (33) is connected to the reset ring block (32), and the other end of the reset ring block (32) is connected to the inner wall of the limiting groove (311).

5. The position-limiting self-sliding protective screw rod according to claim 1, characterized in that: The fixing mechanism (5) comprises a fixing bolt (51) and a fixing nut (52). One end of the fixing bolt (51) passes through the mounting ring block (4) and the screw rod body (1) is rotatably mounted with the fixing nut (52).

6. A position-limiting self-sliding protective screw rod according to claim 5, characterized in that: The mounting ring block (4) is provided with a through hole (41) located at the corresponding fixing mechanism (5), and the smooth rod portion (12) of the screw body (1) is provided with a slide groove through hole (13) located at the corresponding fixing mechanism (5).

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