Box door opening and closing device for working box of stranding machine and stranding machine
By designing the box door opening and closing device, the engagement state changes between the screw and the semicircular nut, the automatic opening and closing of the separate box door of the twisting machine work box is achieved, and the problem that the box door cannot be independently controlled in the prior art is solved. Flexible operation methods and low-cost solutions.
Patent Information
- Application Number
- CN202420196084.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-01-26
- Publication Date
- 2024-12-24
- Estimated Expiration
- 2034-01-26
AI Technical Summary
The working box door of the existing twister cannot be controlled independently, and cannot meet the user's use needs to open or close a single box door.
A box door opening and closing device is designed, including a screw rod, a semicircular nut and an opening and closing device. By pushing the box door, the position of the semicircular nut is changed, and its engagement state with the screw rod is changed, so as to realize the separate opening or closing of the box door. The device includes a torsion spring, a limiting block, a guide rod, a compression spring and a guide device to ensure automated operation and independent control of the box door.
It realizes independent opening and closing control of a single box door, which is simple to operate and easy to implement, with a simple structure and low cost, avoiding the phenomenon of stuck when opening and closing the box door.
Smart Images
Figure CN222226924U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of strand twisting machines, in particular to a box door opening and closing device for a working box of a strand twisting machine and the strand twisting machine. Background Art
[0002] The stranding machine is a machine that twists several steel wires into strands according to a certain twist pitch and twist direction. The stranding machine usually includes a working box, a plurality of pay-off wheels arranged along a straight line in the working box, a traction device, a rotating shaft, etc. The rotation of the rotating shaft cooperates with the linear traction generated by the traction device to make the steel wire produce helical winding and linear motion, forming a strand with a certain twist pitch, that is, a steel strand.
[0003] In an existing stranding machine, a working box includes a box body, a plurality of box doors and a driving device. The box doors are slidably arranged along the length direction of the box body. The driving device drives the plurality of box doors to open or close simultaneously, and cannot independently control a single box door, and cannot meet the user's use requirements of opening or closing only a single box door. Utility Model Content
[0004] In view of the above problems, the present utility model is proposed to provide a box door opening and closing device for a stranding machine working box and a stranding machine that overcomes the above problems or at least partially solves the above problems, and can achieve independent control of the opening and closing of the first box door to meet the user's usage needs.
[0005] Specifically, the utility model provides a box door opening and closing device for a stranding machine working box, comprising:
[0006] A screw rod, the screw rod is rotatably arranged in a clockwise and counterclockwise direction;
[0007] At least one semicircular nut, each of which is engaged with the screw and is movably arranged along the length direction of the screw driven by the screw; the semicircular nut is configured to drive the first box door of the working box to move synchronously;
[0008] At least one opening and closing device, each of the opening and closing devices cooperates with one of the semicircular nut; each of the opening and closing devices is configured to cause the semicircular nut to move in a direction away from the screw rod to disengage from the screw rod when the semicircular nut moves to the first position or the second position, and to cause the semicircular nut to abut against the screw rod to engage with the screw rod when the semicircular nut moves between the first position and the second position.
[0009] Optionally, the opening and closing device comprises:
[0010] A torsion spring, wherein the axis of the torsion spring is arranged parallel to the screw rod, and one end of the torsion spring is arranged stationary relative to the axis of the screw rod, and the other end of the torsion spring is connected to the semicircular nut;
[0011] Two limit blocks, the two limit blocks are respectively arranged at the first position and the second position; each of the limit blocks has a first guiding inclined surface, each of the first guiding inclined surface includes a first end and a second end, the first end is close to the other limit block, the second end is far away from the other limit block, and the distance between the second end and the screw rod is greater than the distance between the first end and the screw rod;
[0012] When the semicircular nut moves to the first position or the second position, the semicircular nut cooperates with the first guiding inclined surface.
[0013] Optionally, the opening and closing device comprises:
[0014] A guide rod, one end of which is vertically connected to the outer peripheral wall of the semicircular nut, and the other end of which is configured to be inserted into the guide groove of the first door;
[0015] A compression spring, wherein the compression spring is sleeved on the guide rod, and one end of the compression spring is in contact with and abuts against the outer peripheral wall of the semicircular nut, and the other end of the compression spring is configured to be in contact with and abut against the first box door;
[0016] Two limit blocks, the two limit blocks are respectively arranged at the first position and the second position; each of the limit blocks has a first guiding inclined surface, each of the first guiding inclined surface includes a first end and a second end, the first end is close to the other limit block, the second end is far away from the other limit block, and the distance between the second end and the screw rod is greater than the distance between the first end and the screw rod;
[0017] When the semicircular nut moves to the first position or the second position, the semicircular nut cooperates with the first guiding inclined surface.
[0018] Optionally, the semicircular nut is provided with second guiding bevels at both ends along the length direction of the screw rod, and each of the second guiding bevels cooperates with one of the first guiding bevels.
[0019] Optionally, the door opening and closing device further includes a driving device, and the driving device is used to drive the screw rod to rotate; the driving device is a driving motor.
[0020] The utility model also provides a strand twisting machine, comprising a box body, at least one first box door arranged on the box body, and a box door opening and closing device for a working box of the strand twisting machine as described in any of the above items; the box door opening and closing device is used to control the opening or closing of the first box door.
[0021] Optionally, each of the first doors comprises:
[0022] A top plate, the top plate being arranged horizontally;
[0023] Side panels are vertically arranged below and in front of the top panel;
[0024] A connecting plate connects the front end of the top plate and the upper end of the side plate.
[0025] Optionally, the stranding machine further comprises a guide device, wherein the guide device extends in a length direction parallel to the length of the screw rod;
[0026] The guide device is configured to only allow the first door to move along a length direction parallel to the lead screw.
[0027] Optionally, the guiding device comprises:
[0028] A first guide device is arranged between the rear end of the top plate and the box body; the first guide device comprises a first slide groove arranged on the first box door and a first guide rail arranged on the box body, and the first guide rail is located in the first slide groove;
[0029] The second guide device is arranged between the lower end of the side plate and the box body; the second guide device includes a second slide groove arranged on the first box door and a second guide rail arranged on the box body, and the second guide rail is located in the second slide groove.
[0030] Optionally, the strand twisting machine further comprises at least one second door arranged at the rear side of the first door, and the second door is rotatably arranged on the box body.
[0031] In the box door opening and closing device for the working box of the stranding machine of the utility model, the first box door is pushed lightly to change the position of the semicircular nut, thereby changing the meshing state of the semicircular nut and the screw rod, thereby realizing the automatic opening or automatic closing of the first box door. The box door opening and closing device of the utility model not only realizes the individual control of the opening and closing of a single first box door, but also is simple to operate and easy to realize.
[0032] Based on the detailed description of the specific embodiments of the present invention in combination with the accompanying drawings below, those skilled in the art will become more aware of the above and other purposes, advantages and features of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS
[0033] Hereinafter, some specific embodiments of the present invention will be described in detail in an exemplary and non-limiting manner with reference to the accompanying drawings. The same reference numerals in the accompanying drawings indicate the same or similar components or parts. It should be understood by those skilled in the art that these drawings are not necessarily drawn to scale. In the accompanying drawings:
[0034] Figure 1 It is a schematic front view of the cooperation between the box door opening and closing device for the working box of the stranding machine and the first box door according to one embodiment of the utility model;
[0035] Figure 2 It is a schematic top view of the cooperation between the box door opening and closing device for the working box of the stranding machine and the first box door according to one embodiment of the utility model;
[0036] Figure 3 is a schematic front view of a box door opening and closing device for a working box of a stranding machine according to another embodiment of the utility model cooperating with a first box door;
[0037] Figure 4 It is a schematic left view of the cooperation between the box body and the first box door according to one embodiment of the utility model. DETAILED DESCRIPTION
[0038] Refer to the following Figures 1 to 4 To describe the box door opening and closing device for the working box of a stranding machine in an embodiment of the present utility model. In the description of this embodiment, it should be understood that the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features, that is, include one or more of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined. When a feature "includes or contains" one or some of the features it covers, unless otherwise specifically described, this indicates that other features are not excluded and other features may be further included.
[0039] Unless otherwise clearly specified and limited, the terms "set", "install", "connect", "connect", "fix", "couple" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. A person of ordinary skill in the art should be able to understand the specific meanings of the above terms in the present utility model according to the specific circumstances.
[0040] In addition, in the description of this embodiment, the first feature being "above" or "below" the second feature may include the first and second features being in direct contact, or may include the first and second features not being in direct contact but being in contact through another feature between them. That is, in the description of this embodiment, the first feature being "above", "above", and "above" the second feature includes the first feature being directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. The first feature being "below", "below", or "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.
[0041] In the description of the present embodiment, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.
[0042] Figure 1 1 is a schematic front view of the door opening and closing device for the working box of the stranding machine according to an embodiment of the present invention cooperating with the first door, as shown in FIG. Figure 1 As shown, and refer to Figures 2 to 4 The embodiment of the utility model provides a box door opening and closing device 100 for a working box of a stranding machine, comprising a screw rod 110, at least one semicircular nut 120 and at least one opening and closing device. The screw rod 110 is rotatably arranged in a clockwise and counterclockwise direction. Each semicircular nut 120 is engaged with the screw rod 110, and is movably arranged along the length direction of the screw rod 110 under the drive of the screw rod 110. The semicircular nut 120 is configured to drive the first box door 220 of the working box to move synchronously. Each opening and closing device cooperates with a semicircular nut 120. Each opening and closing device is configured to move the semicircular nut 120 away from the screw rod 110 when the semicircular nut 120 moves to the first position or the second position to disengage from the screw rod 110, and to abut against the screw rod 110 when the semicircular nut 120 moves between the first position and the second position to engage with the screw rod 110. The semicircular nut 120 in this embodiment can be obtained by cutting a complete nut along a plane passing through the axis of the nut.
[0043] The stranding machine working box in this embodiment includes a box body 210 and a plurality of first box doors 220 installed on the box body 210, and each first box door 220 can be slidably opened or closed under the drive of a semicircular nut 120. When the semicircular nut 120 is in the first position, the semicircular nut 120 is disengaged from the screw rod 110, and the first box door 220 is in an open state and remains in this state. When the semicircular nut 120 is in the second position, the semicircular nut 120 is disengaged from the screw rod 110, and the first box door 220 is in a closed state and remains in this state. When the semicircular nut 120 is between the first position and the second position, the semicircular nut 120 is engaged with the screw rod 110, and the first box door 220 is in a state of being closed or opened.
[0044] In the box door opening and closing device 100 for the working box of the stranding machine of the embodiment of the utility model, when multiple first box doors 220 are in the closed state, when one or more of the first box doors 220 need to be opened, the screw rod 110 is first controlled to rotate clockwise, and the first box door 220 to be opened is gently pushed, and the first box door 220 drives the corresponding semicircular nut 120 to move in the direction away from the second position. When it moves to between the first position and the second position, the semicircular nut 120 is meshed with the screw rod 110. Driven by the screw rod 110, the semicircular nut 120 moves along the length direction of the screw rod 110 and drives the first box door 220 to move synchronously. Until the semicircular nut 120 moves to the first position, the semicircular nut 120 is disengaged from the screw rod 110, at which time the semicircular nut 120 and the first box door 220 no longer move, and the first box door 220 is in the open state.
[0045] Similarly, when multiple first doors 220 are in an open state and one or more of the first doors 220 need to be closed, the screw rod 110 is first controlled to rotate counterclockwise, and the first door 220 to be closed is gently pushed. The first door 220 drives the corresponding semicircular nut 120 to move in a direction away from the first position. When it moves to between the first position and the second position, the semicircular nut 120 is meshed with the screw rod 110. Driven by the screw rod 110, the semicircular nut 120 moves along the length direction of the screw rod 110 and drives the first door 220 to move synchronously. Until the semicircular nut 120 moves to the second position, the semicircular nut 120 is disengaged from the screw rod 110, at which time the semicircular nut 120 and the first door 220 no longer move, and the first door 220 is in a closed state.
[0046] In the box door opening and closing device 100 for the working box of the stranding machine of the embodiment of the utility model, by gently pushing the first box door 220, the position of the semicircular nut 120 is changed, and then the meshing state of the semicircular nut 120 and the screw rod 110 is changed, so that the first box door 220 is automatically opened or closed. The box door opening and closing device 100 of this embodiment not only realizes the individual control of the opening and closing of a single first box door 220, but also is simple to operate and easy to implement.
[0047] In some embodiments of the present invention, Figure 1 and Figure 2 As shown, the opening and closing device includes a torsion spring 131 and two limit blocks 132. The axis of the torsion spring 131 is arranged parallel to the screw rod 110, and one end of the torsion spring 131 is arranged stationary relative to the axis of the screw rod 110, and the other end of the torsion spring 131 is connected to the semicircular nut 120. The two limit blocks 132 are respectively arranged at the first position and the second position. Each limit block 132 has a first guide bevel 1321, and each first guide bevel 1321 includes a first end and a second end, the first end is close to the other limit block 132, the second end is far away from the other limit block 132, and the distance between the second end and the screw rod 110 is greater than the distance between the first end and the screw rod 110. When the semicircular nut 120 moves to the first position or the second position, the semicircular nut 120 cooperates with the first guide bevel 1321. The semicircular nut 120 in this embodiment is rotatably connected to the first box door 220.
[0048] In this embodiment, when the semicircular nut 120 gradually moves to the first position or the second position, the semicircular nut 120 overcomes the torsion of the torsion spring 131 under the action of the first guide bevel 1321, and gradually moves away from the screw rod 110 until the semicircular nut 120 is disengaged from the screw rod 110, the semicircular nut 120 no longer moves, and the first box door 220 also stops moving, at which time the first box door 220 is in an open or closed state. When the semicircular nut 120 gradually moves away from the first position or the second position, the semicircular nut 120 gradually approaches the screw rod 110 under the action of the torsion spring 131 and the first guide bevel 1321 until the semicircular nut 120 is engaged with the screw rod 110, and the semicircular nut 120 moves driven by the screw rod 110, at which time the first box door 220 is in an opening or closing state. In this embodiment, by providing a torsion spring 131 and two limit blocks 132, automatic engagement and disengagement of the semicircular nut 120 and the screw rod 110 are achieved, thereby achieving automatic opening and closing of the first box door 220. In addition, the structure is simple, easy to design and manufacture, and low in cost.
[0049] In some embodiments of the present invention, Figure 3As shown, the opening and closing device includes a guide rod 133, a compression spring 134 and two limit blocks 132. One end of the guide rod 133 is vertically connected to the outer peripheral wall of the semicircular nut 120, and the other end of the guide rod 133 is configured to be inserted into the guide groove of the first box door 220. The compression spring 134 is sleeved on the guide rod 133, and one end of the compression spring 134 contacts and abuts against the outer peripheral wall of the semicircular nut 120, and the other end is configured to contact and abut against the first box door 220. The two limit blocks 132 are respectively arranged at a first position and a second position. Each limit block 132 has a first guide inclined surface 1321, and each first guide inclined surface 1321 includes a first end and a second end, the first end is close to the other limit block 132, the second end is far away from the other limit block 132, and the distance between the second end and the screw rod 110 is greater than the distance between the first end and the screw rod 110. When the semicircular nut 120 moves to the first position or the second position, the semicircular nut 120 cooperates with the first guide slope 1321 .
[0050] In this embodiment, when the semicircular nut 120 gradually moves to the first position or the second position, the semicircular nut 120 overcomes the elastic force of the compression spring 134 under the action of the first guide bevel 1321, and gradually moves away from the screw rod 110 until the semicircular nut 120 is disengaged from the screw rod 110, the semicircular nut 120 no longer moves, and the first box door 220 also stops moving, at which time the first box door 220 is in an open or closed state. When the semicircular nut 120 gradually moves away from the first position or the second position, the semicircular nut 120 gradually approaches the screw rod 110 under the action of the compression spring 134 and the first guide bevel 1321 until the semicircular nut 120 is engaged with the screw rod 110, and the semicircular nut 120 moves driven by the screw rod 110, at which time the first box door 220 is in an opening or closing state. In this embodiment, by providing a guide rod 133, a compression spring 134 and two limit blocks 132, automatic engagement and disengagement of the semicircular nut 120 and the screw rod 110 are achieved, thereby achieving automatic opening and closing of the first box door 220. Moreover, the structure is simple, easy to design and manufacture, and low in cost.
[0051] In some embodiments of the present invention, Figures 1 to 3 As shown, the two ends of the semicircular nut 120 along the length direction of the screw rod 110 are respectively provided with second guiding inclined surfaces 121 , and each second guiding inclined surface 121 cooperates with a first guiding inclined surface 1321 .
[0052] In this embodiment, when the semicircular nut 120 gradually moves to the first position or the second position, the first guide bevel 1321 cooperates with the second guide bevel 121, so that the semicircular nut 120 and the screw rod 110 gradually move away from each other until they are disengaged. When the semicircular nut 120 gradually moves away from the first position or the second position, the first guide bevel 1321 cooperates with the second guide bevel 121, so that the semicircular nut 120 and the screw rod 110 gradually move closer until they are engaged. In this embodiment, since the second guide bevel 121 is provided on the semicircular nut 120, the movement of the semicircular nut 120 on the first guide bevel 1321 is facilitated, so that the first box door 220 is smoother when opening or closing, and the jamming phenomenon is avoided.
[0053] In some embodiments of the present invention, Figures 1 to 3 As shown, the door opening and closing device 100 also includes a driving device 140, and the driving device 140 is used to drive the screw rod 110 to rotate. In this embodiment, the driving device 140 drives the screw rod 110 to rotate clockwise or counterclockwise, thereby realizing the opening or closing of the first door 220. In the process of realizing the opening or closing of the first door 220, when the first door 220 is closed and the stranding machine needs to work for a long time, the driving device 140 can be turned off to avoid the driving device 140 being turned on for a long time, causing energy loss. When the first door 220 needs to be opened, the driving device 140 is turned on again to open the corresponding first door 220.
[0054] In some embodiments of the present utility model, the driving device 140 is a driving motor. The driving motor has the advantages of simple structure, convenient control, small size, high efficiency, variable power, and no pollution. Among them, the driving motor is a device that converts electrical energy into mechanical energy. The driving motor can be divided into a DC motor, an asynchronous motor, a synchronous motor, etc. according to the structure and working principle. In this embodiment, the type of the appropriate driving motor can be selected according to the needs.
[0055] The utility model embodiment also provides a stranding machine, such as Figure 1 , Figure 2 and Figure 4 As shown, it includes a box body 210, at least one first box door 220 arranged at the front side of the box body 210, and a box door opening and closing device 100 for a stranding machine working box in any of the above embodiments. The box door opening and closing device 100 is used to control the opening or closing of the first box door 220.
[0056] In the stranding machine of the present invention, by gently pushing the first box door 220, the position of the semicircular nut 120 is changed, and then the meshing state of the semicircular nut 120 and the screw rod 110 is changed, so that the first box door 220 is automatically opened or closed. The box door opening and closing device 100 of the present invention not only realizes the individual control of the opening and closing of a single first box door 220, but also is simple to operate and easy to implement.
[0057] In some embodiments of the present invention, a mounting bracket is provided on the top wall of the box body 210, and the door opening and closing device 100 is installed on the box body 210 through the mounting bracket.
[0058] In some embodiments of the present invention, Figure 4 As shown, each first box door 220 includes a top plate, a side plate and a connecting plate. The top plate is arranged horizontally. The side plate is arranged vertically and is arranged below and in front of the top plate. The connecting plate connects the front end of the top plate and the upper end of the side plate.
[0059] In this embodiment, the first box door 220 covers the upper side and the front side of the box body 210. When the first box door 220 is opened, a larger operating space can be obtained, which is convenient for repairing and replacing the components inside the stranding machine. Of course, the first box door 220 can also be other structural forms.
[0060] In some embodiments of the present invention, Figure 4 As shown, the stranding machine further includes a guide device, which extends in a length direction parallel to the lead screw 110. The guide device is configured to only allow the first box door 220 to move in a length direction parallel to the lead screw 110.
[0061] In this embodiment, due to the provision of a guiding device, the first box door 220 can only move along the length direction parallel to the screw rod 110. On the one hand, it is convenient for the movement of the first box door 220. On the other hand, since the movement direction of the first box door 220 is parallel to the movement direction of the semicircular nut 120, it can prevent the first box door 220 and the semicircular nut 120 from generating internal stress during the movement, thereby hindering the movement of the first box door 220 and the semicircular nut 120.
[0062] In some embodiments of the present invention, Figure 4 As shown, the guide device includes a first guide device 230 and a second guide device 240. The first guide device 230 is arranged between the rear end of the top plate and the box body 210. The first guide device 230 includes a first slide groove arranged on the first box door 220 and a first guide rail arranged on the box body 210, and the first guide rail is located in the first slide groove. The second guide device 240 is arranged between the lower end of the side plate and the box body 210. The second guide device 240 includes a second slide groove arranged on the first box door 220 and a second guide rail arranged on the box body 210, and the second guide rail is located in the second slide groove.
[0063] In this embodiment, since a first guide device 230 is provided between the top of the first door 220 and the box body 210, and a second guide device 240 is provided between the bottom of the first door 220 and the box body 210, the first door 220 is better supported and guided, and the movement of the first door 220 on the box body 210 is facilitated, and the opening or closing of the first door 220 is facilitated.
[0064] In some embodiments of the present invention, the strand twisting machine further includes at least one second door disposed at the rear side of the first door 220 , and the second door is rotatably disposed on the box body 210 .
[0065] In this embodiment, since a second door is also provided, the second door can be opened or closed from the rear side of the box body 210. During maintenance, only the first door 220 can be opened, only the second door can be opened, or both the first door 220 and the second door can be opened. When the first door 220 and the second door are opened at the same time, a larger operating space can be obtained, which is convenient for maintenance and replacement of parts inside the stranding machine.
[0066] At this point, those skilled in the art should recognize that, although multiple exemplary embodiments of the present invention have been shown and described in detail herein, many other variations or modifications that conform to the principles of the present invention can still be directly determined or derived from the contents disclosed in the present invention without departing from the spirit and scope of the present invention. Therefore, the scope of the present invention should be understood and recognized as covering all such other variations or modifications.
Claims
1. A door opening and closing device for a stranding machine working box, characterized in that: include: A screw rod, the screw rod is rotatably arranged in a clockwise and counterclockwise direction; At least one semicircular nut, each of which is engaged with the screw and is movably arranged along the length direction of the screw driven by the screw; the semicircular nut is configured to drive the first box door of the working box to move synchronously; At least one opening and closing device, each of the opening and closing devices cooperates with one of the semicircular nut; each of the opening and closing devices is configured to cause the semicircular nut to move in a direction away from the screw rod to disengage from the screw rod when the semicircular nut moves to the first position or the second position, and to cause the semicircular nut to abut against the screw rod to engage with the screw rod when the semicircular nut moves between the first position and the second position.
2. The door opening and closing device according to claim 1, characterized in that: The opening and closing device comprises: A torsion spring, wherein the axis of the torsion spring is arranged parallel to the screw rod, and one end of the torsion spring is arranged stationary relative to the axis of the screw rod, and the other end of the torsion spring is connected to the semicircular nut; Two limit blocks, the two limit blocks are respectively arranged at the first position and the second position; each of the limit blocks has a first guiding inclined surface, each of the first guiding inclined surface includes a first end and a second end, the first end is close to the other limit block, the second end is far away from the other limit block, and the distance between the second end and the screw rod is greater than the distance between the first end and the screw rod; When the semicircular nut moves to the first position or the second position, the semicircular nut cooperates with the first guiding inclined surface.
3. The door opening and closing device according to claim 1, characterized in that: The opening and closing device comprises: A guide rod, one end of which is vertically connected to the outer peripheral wall of the semicircular nut, and the other end of which is configured to be inserted into the guide groove of the first door; A compression spring, wherein the compression spring is sleeved on the guide rod, and one end of the compression spring is in contact with and abuts against the outer peripheral wall of the semicircular nut, and the other end of the compression spring is configured to be in contact with and abut against the first box door; Two limit blocks, the two limit blocks are respectively arranged at the first position and the second position; each of the limit blocks has a first guiding inclined surface, each of the first guiding inclined surface includes a first end and a second end, the first end is close to the other limit block, the second end is far away from the other limit block, and the distance between the second end and the screw rod is greater than the distance between the first end and the screw rod; When the semicircular nut moves to the first position or the second position, the semicircular nut cooperates with the first guiding inclined surface.
4. The door opening and closing device according to claim 2 or 3, characterized in that: The two ends of the semicircular nut along the length direction of the screw rod are respectively provided with second guiding inclined surfaces, and each of the second guiding inclined surfaces cooperates with one of the first guiding inclined surfaces.
5. The door opening and closing device according to claim 1, characterized in that: It also includes a driving device, which is used to drive the screw rod to rotate; the driving device is a driving motor.
6. A stranding machine, comprising a box body and at least one first box door arranged on the box body, characterized in that: It also includes a door opening and closing device for a working box of a stranding machine according to any one of claims 1 to 5; the door opening and closing device is used to control the opening or closing of the first door.
7. The strand twisting machine according to claim 6, characterized in that: Each of the first doors comprises: A top plate, the top plate being arranged horizontally; Side panels are vertically arranged below and in front of the top panel; A connecting plate connects the front end of the top plate and the upper end of the side plate.
8. The strand twisting machine according to claim 7, characterized in that: Also included is a guide device, the guide device extending in a direction parallel to the length of the screw rod; The guide device is configured to only allow the first door to move along a length direction parallel to the lead screw.
9. The stranding machine according to claim 8, characterized in that The guiding device comprises: A first guide device is arranged between the rear end of the top plate and the box body; the first guide device comprises a first slide groove arranged on the first box door and a first guide rail arranged on the box body, and the first guide rail is located in the first slide groove; The second guide device is arranged between the lower end of the side plate and the box body; the second guide device includes a second slide groove arranged on the first box door and a second guide rail arranged on the box body, and the second guide rail is located in the second slide groove.
10. The strand twisting machine according to claim 6, characterized in that: It also includes at least one second door arranged at the rear side of the first door, and the second door is rotatably arranged on the box body.