Rotation in-place locking device

Abstract

The utility model discloses a rotation in-place locking device, which relates to the electrical field and comprises a main shaft, a first operating rod, a second operating rod, a baffle plate and a locking mechanism. According to the locking device, simultaneous operation of the two operation rods can be avoided by designing the baffle, after operation is in place, the bolt part and the ratchet wheel are matched with the chuck and the sliding plate correspondingly, locking of the mechanism is achieved, the operation safety is guaranteed, and meanwhile excessive operation is avoided.

Description

Technical Field

[0001] The present application relates to the electrical field, and in particular to a rotation-in-place locking device. Background Art

[0002] The three-position switch is an important device in the electrical field, which has a closed position, an open position and a grounded position. The existing three-position switch has the following problems: (1) the operator cannot clearly know whether the operation is in place and cannot prevent excessive operation; (2) there is a lack of a limiting mechanism, which cannot prevent the operating handle from being pulled out during the operation. Utility Model Content

[0003] The embodiment of the present application provides a rotation-in-place locking device that can avoid excessive operation.

[0004] The application discloses a rotation-in-place locking device, comprising a main shaft, a first operating rod, a second operating rod, a baffle and a locking mechanism;

[0005] The main shaft, the first operating rod and the second operating rod are distributed in a triangle and are arranged parallel to each other. The main shaft is located below the first operating rod and the second operating rod. The main shaft, the first operating rod and the second operating rod can rotate synchronously.

[0006] The first operating rod is provided with a first operating hole, the second operating rod is provided with a second operating hole, and the axial direction of the first operating rod is configured as a first direction;

[0007] The baffle is located on one side of the first operating rod and the second operating rod along the first direction, and the baffle is used to block the first operating hole and the second operating hole; the baffle can slide in the second direction, and an alignment hole is provided on the baffle, and the alignment hole is used to expose the first operating hole or the second operating hole;

[0008] The locking mechanism includes a chuck and two locking assemblies; the chuck is coaxially fixed on the main shaft, and at least two slots are provided on the chuck; the two locking assemblies are respectively arranged on the radial sides of the chuck; the locking assembly includes a slide plate, an elastic member and a push column; the slide plate is slidingly arranged, the sliding direction of the slide plate is configured as the radial direction of the chuck, and the slide plate is provided with a latch portion that cooperates with the slot; the elastic member is arranged on the slide plate; one end of the push column is fixedly connected to the baffle, and the push column is used to push the elastic member and the slide plate toward the chuck.

[0009] The rotation-in-place locking device of the present application has at least the following beneficial effects:

[0010] The rotation-to-position locking device of the present application includes a main shaft, a first operating rod, a second operating rod, a baffle and a locking mechanism; when the first operating rod or the second operating rod needs to be rotated, the alignment hole on the baffle is slid to align with the first operating hole or the second operating hole, and then the operating handle is used to operate. The baffle of the present application can block at least one operating hole to avoid operating the two operating holes at the same time, thereby ensuring safety. Before the operation, the baffle drives the elastic part and the slide plate to move toward the chuck, and the latch part on the slide plate abuts against the outer periphery of the chuck. When the operating rod is rotated into position, the slot on the chuck also rotates to correspond to the latch part, and the latch part is inserted into the slot, thereby limiting the rotation of the chuck, the main shaft and the two operating rods, so that outsiders cannot continue to rotate the operating rod, thereby avoiding excessive operation, and thus achieving the state locking after the rotation into position. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present application. Also, the same reference symbols are used throughout the accompanying drawings to represent the same components. In the accompanying drawings:

[0012] Figure 1 It is a structural diagram of the rotation-in-place locking device of the present application;

[0013] Figure 2 is a vertical cross-sectional view of the rotating locking device of the present application;

[0014] Figure 3 These are two structural schematic diagrams capable of achieving synchronous movement of the main shaft, the first operating rod and the second operating rod;

[0015] Figure 4 It is a partial schematic diagram of the rotation-in-place locking device (the baffle is hidden);

[0016] Figure 5 yes Figure 1 Another angle view of the locking device rotated into place;

[0017] Figure 6 is a schematic diagram of the rotation-in-place locking device switching from the closed state to the open state;

[0018] Figure 7 is a schematic diagram of the rotation of the locking device in place to switch from the open state to the grounded state;

[0019] Description of the reference numerals is as follows:

[0020] 1. Main shaft; 1a. Spiral groove;

[0021] 2. first operating rod; 2a. first operating hole;

[0022] 3. Second operating rod; 3a. Second operating hole;

[0023] 4. baffle; 4a. alignment hole; 41. mounting column;

[0024] 5. Locking mechanism; 51. Chuck; 51a. Card slot; 52. Locking assembly; 521. Slide plate; 5211. Latch portion; 5212. Bar portion; 521a. Guide groove; 522. Elastic member; 523. Push column; 524. Ratchet; 525. Tension spring; 526. Guide column;

[0025] 6. Slider;

[0026] 7. Driving column;

[0027] 8a, first gear; 8b, second gear; 8c, third gear;

[0028] 9. Limiting plate; 9a. Avoidance groove; 91. Limiting part;

[0029] 10. Operating handle; 101. Ring groove. DETAILED DESCRIPTION

[0030] The features and exemplary embodiments of various aspects of the present application will be described in detail below. In order to make the purpose, technical solutions and advantages of the present application clearer, the present application will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only intended to explain the present application, rather than to limit the present application. For those skilled in the art, the present application can be implemented without the need for some of these specific details. The following description of the embodiments is only to provide a better understanding of the present application by illustrating the examples of the present application.

[0031] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the statement "include..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0032] like Figure 1As shown, a rotation-in-place locking device comprises a main shaft 1, a first operating rod 2, a second operating rod 3, a baffle 4 and a locking mechanism 5. The rotation-in-place locking device in this embodiment refers to the rotation to the closing, opening or grounding state. The specific structure of the rotation-in-place locking device is described as follows:

[0033] like Figure 2 As shown, from a horizontal perspective, the main shaft 1, the first operating rod 2 and the second operating rod 3 are arranged parallel to each other, and the axes of the three are all arranged in a horizontal first direction. The main shaft 1 is located below the first operating rod 2 and the second operating rod 3, and the first operating rod 2 and the second operating rod 3 are located at the same height.

[0034] The main shaft 1, the first operating rod 2 and the second operating rod 3 can rotate synchronously. There are two ways to realize the structure of synchronous rotation of the three, such as Figure 3 As shown:

[0035] The first method (illustrated in the drawings of this application): Figure 3 As shown in (a), the rotation-in-position locking device also includes a slider 6, a driving column 7, a first gear 8a and a second gear 8b. The slider 6 is provided with a light hole and a threaded hole. The first operating rod 2 is coaxially inserted into the light hole. The outer circumference of the second operating rod 3 is provided with an external thread, and the second operating rod 3 is inserted into the threaded hole. The second operating rod 3 is threadedly matched with the slider 6. A spiral groove 1a is provided on the outer circumference of the main shaft 1. The spiral groove 1a is formed on the outer circumference of the main shaft 1 along the axial direction of the main shaft 1. The upper end of the driving column 7 is fixedly connected to the slider 6, and the lower end of the driving column 7 is inserted into the spiral groove 1a. When the slider 6 moves in the first direction (that is, the axial direction of the first operating rod 2), the driving column 7 synchronously drives the main shaft 1 to rotate; the first gear 8a is coaxially fixed on the first operating rod 2, the second gear 8b is coaxially fixed on the second operating rod 3, and the first gear 8a and the second gear 8b are meshed. The first gear 8a and the second gear 8b are used to realize the synchronous rotation of the first operating rod 2 and the second operating rod 3. Therefore, when any operating lever rotates, it can drive the other operating lever and the main shaft 1 to rotate (the slider 6 also slides accordingly), thereby achieving synchronous rotation of the three.

[0036] The second type: Figure 3 As shown in (b), the rotation-in-place locking device also includes a first gear 8a, a second gear 8b and a third gear 8c. The first gear 8a is coaxially fixed on the first operating rod 2, the second gear 8b is coaxially fixed on the second operating rod 3, and the third gear 8c is coaxially fixed on the main shaft 1, and the first gear 8a, the second gear 8b and the third gear 8c are meshed with each other.

[0037] In this embodiment, the main shaft 1, the first operating rod 2 and the second operating rod 3 can be rotated synchronously by one of the above two methods.

[0038] like Figure 4 As shown, one axial end face of the first operating rod 2 is provided with a first operating hole 2a, and one axial end face of the second operating rod 3 is provided with a second operating hole 3a. Both operating holes (i.e., the first operating hole 2a and the second operating hole 3a) are used by external staff to rotate the first operating rod 2 or the second operating rod 3 through the operating handle 10. The axial end faces of the two operating rods are arranged flush, and the two operating holes are located on the same side. Among them, the end of the first operating rod 2 or the second operating rod 3 away from the operating hole can be used to connect with the external sealed pole, thereby driving the sealed pole to switch the working state.

[0039] like Figure 5 As shown, the baffle 4 is located on one side of the two operating holes, specifically: along the first direction, the baffle 4 is located at the front end of the two operating holes. When the operating holes do not need to be rotated, the baffle 4 blocks the operating holes in front of the two operating holes to prevent the staff from performing illegal operations. The baffle 4 can slide in the second direction, and the second direction intersects the first direction vertically in the horizontal plane. The sliding setting of the baffle 4 is, for example: a mounting column 41 is fixedly provided on the side of the baffle 4 facing the operating hole, the axial direction of the mounting column 41 is configured as the first direction, and a mounting groove is provided on the external structure, and the length direction of the mounting groove is configured as the second direction. One end of the mounting column 41 is inserted into the mounting groove, and the baffle 4 can only slide in the second direction through the cooperation of the mounting column 41 and the mounting groove. In addition, the baffle 4 can also be slidably set by the cooperation of a slide groove and a slide rail.

[0040] like Figure 5 As shown, at least one alignment hole 4a is provided on the baffle 4, and the alignment hole 4a is used to expose the first operating hole 2a or the second operating hole 3a. When the baffle 4 slides to a certain position in the second direction, the alignment hole 4a can be aligned with a certain operating hole in the first direction, thereby exposing the operating hole, making it convenient for the operating handle 10 to be inserted into the operating hole for operation.

[0041] like Figure 2 As shown, the locking mechanism 5 includes a chuck 51 and two locking assemblies 52. The chuck 51 is circular in shape, and a clamping groove 51a is provided on the outer peripheral surface of the chuck 51. The number of the clamping grooves 51a is at least two (the number of the clamping grooves 51a shown in the present embodiment is two). The chuck 51 is coaxially fixed on the spindle 1, and when the spindle 1 rotates, the chuck 51 can be driven to rotate synchronously.

[0042] like Figure 2As shown, the two locking assemblies 52 are respectively disposed on both sides of the chuck 51 . Specifically, along the radial direction (ie, the second direction) of the chuck 51 , the two locking assemblies 52 are respectively located on both sides of the chuck 51 . The locking assembly 52 includes a slide plate 521, an elastic member 522 and a push column 523; the slide plate 521 is slidably arranged, and the sliding direction of the slide plate 521 is the radial direction of the chuck 51 (i.e., the second direction). The slide plate 521 is slidably arranged in a manner such as: the slide plate 521 is slidably arranged in a manner of a slide groove and a slide rail or in other existing manners, as long as the slide plate 521 can be limited to slide only in the radial direction (i.e., the second direction) of the chuck 51. A slidable arrangement of the slide plate 521 provided in this embodiment is as follows: a plurality of guide columns 526 are arranged on the slide plate 521, one end of the guide column 526 is fixed to the external structure, the axial configuration of the guide column 526 is the first direction, a guide groove 521a is arranged on the slide plate 521, and the length direction of the guide groove 521a is configured as the second direction, one end of the guide column 526 is inserted into the guide groove 521a, and the cooperation between the guide column 526 and the guide groove 521a enables the slide plate 521 to slide only in the second direction.

[0043] like Figure 2 As shown, a latch portion 5211 is provided at one end of the slide plate 521 close to the chuck 51, and the latch portion 5211 can be inserted into the card slot 51a to limit the rotation of the chuck 51. In this embodiment, preferably, the end surface of the latch portion 5211 facing the chuck 51 is configured as an arc surface, and the curvature of the arc surface matches the outer peripheral surface of the chuck 51, so that the arc surface can be attached to the outer peripheral surface of the chuck 51. In this embodiment, the front end surface of the latch portion 5211 is designed as an arc surface to prevent the latch portion 5211 from pressing the chuck 51 when it is not aligned with the card slot 51a, causing the chuck 51 and the spindle 1 to be difficult to rotate.

[0044] like Figure 2As shown, the elastic member 522 is arranged on the slide plate 521, and the elastic member 522 and the push column 523 are arranged correspondingly in the second direction. One end of the push column 523 is fixedly connected to the baffle 4. When the baffle 4 slides in the second direction, it can drive the push column 523 to move, and then the push column 523 can resist the elastic member 522 and push the slide plate 521 to move toward the chuck 51. In this embodiment, since the part in contact with the push pin 523 is the elastic member 522 with elastic force, when the latch portion 5211 abuts against the outer peripheral surface of the chuck 51, even if the baffle 4 and the push pin 523 continue to be pushed, the slide plate 521 will not move forward, because the elastic member 522 absorbs the driving force given by the push pin 523 and converts part of the driving force into a tightening force of the latch portion 5211 on the chuck 51. When an external staff member operates the first operating rod 2 or the second operating rod 3 to rotate, the chuck 51 rotates accordingly. When the slot 51a rotates to be radially aligned with the latch portion 5211 in the chuck 51, the latch portion 5211 is inserted into the slot 51a, thereby limiting the rotation of the chuck 51.

[0045] like Figure 2 As shown, the elastic member 522 is configured as a torsion spring. By arranging the torsion spring to elastically contact with the push column 523, the flexibility of the structure can be improved, and the embarrassment of the baffle plate 4 not being able to be pushed when the alignment hole 4a of the baffle plate 4 is not aligned with the operation hole can be avoided. At the same time, the elastic force of the torsion spring can realize the insertion and locking of the latch portion 5211 at the moment when the card slot 51a is aligned with the latch portion 5211.

[0046] like Figure 2 As shown, the locking assembly 52 of this embodiment further includes a pawl 524 coaxially fixed on the first operating rod 2 or the second operating rod 3. In this embodiment, preferably, the left and right locking assemblies 52 each include a pawl 524, the left pawl 524 is coaxially fixed on the first operating rod 2, and the right pawl 524 is coaxially fixed on the second operating rod 3. The side of the slide plate 521 facing the chuck 51 is provided with a stop bar portion 5212. When the latch portion 5211 is inserted into the card slot 51a, the slide plate 521 simultaneously moves forward for a short distance. At this time, the stop bar portion 5212 enters the rotation range of the pawl 524, and the pawl 524 just abuts against the stop bar portion 5212 in its circumferential direction, thereby realizing the position limitation of the pawl 524. Because the pawl 524 is fixed on the first operating rod 2 or the second operating rod 3, the positions of the corresponding first operating rod 2, the second operating rod 3 and the main shaft 1 are also limited at the same time. In this embodiment, the cooperation between the chuck 51 and the latch portion 5211 can serve as the first position for limiting the rotation of the first operating rod 2, the second operating rod 3 and the main shaft 1, and the cooperation between the pawl 524 and the barrier portion 5212 can serve as the second position for limiting the rotation of the first operating rod 2, the second operating rod 3 and the main shaft 1.

[0047] like Figure 2As shown, the locking assembly 52 of this embodiment further includes a tension spring 525, one end of which is fixedly arranged on the external structure, and the other end is connected to the slide plate 521, and the extension direction of the tension spring 525 is configured as the sliding direction of the slide plate 521 (i.e., the second direction). When the slide plate 521 slides toward the chuck 51, the tension spring 525 is in a tensioned state, and the tension spring 525 can give the slide plate 521 a restoring force. When the slide plate 521 is reset, the elastic member 522 on the slide plate 521 can also drive the push column 523 and the baffle plate 4 to retreat and reset.

[0048] like Figure 4 As shown, in some preferred embodiments, the rotation-in-place locking device further comprises a limit plate 9, which is fan-shaped in the first direction, and is coaxially fixed at the end of the spindle 1. Along the first direction, the limit plate 9 is located in front of the two operating holes.

[0049] The limit plate 9 can prevent the operator from pulling out the operating handle 10 when operating the first operating lever 2 or the second operating lever 3. The limit plate 9 is arranged in parallel with the baffle plate 4, and the upper arc surface of the limit plate 9 is provided with at least two avoidance grooves 9a (through grooves), and along the circumferential direction of the limit plate 9 (i.e., the arc direction of the fan), the solid part between the two avoidance grooves 9a is configured as a limit portion 91 of the limit plate 9, and the limit portion 91 is used to prevent the operating handle 10 from being pulled out.

[0050] like Figure 4 As shown, when the main shaft 1 rotates, the limit plate 9 can also swing accordingly. Only when the first operating rod 2 or the second operating rod 3 is operated into place (that is, the latch portion 5211 is inserted into the slot 51a), the avoidance groove 9a can be aligned with the operating hole and the operating handle 10, and the operating handle 10 can then be pulled out along the first direction.

[0051] Among them, Figure 4 As shown, the operating handle 10 is provided with an annular groove 101. Before the first operating rod 2 or the second operating rod 3 is operated in place, the limiting portion 91 of the limiting plate 9 rotates into the annular groove 101 of the operating handle 10. Since the limiting portion 91 restricts the inner side wall of the annular groove 101, the operating handle 10 cannot be pulled out to the outside of the operating hole along the first direction. Only when the latch portion 5211 is inserted into the slot 51a, the avoidance groove 9a on the limiting plate 9 can be rotated to face the operating hole and the operating handle 10. At this time, the operating handle 10 can pass through the avoidance groove 9a and be pulled out from the operating hole. In this embodiment, the limiting plate 9 can swing synchronously with the main shaft 1, can synchronously lock the operating handle 10 in the operating hole, and can synchronously release the operating handle 10 to be pulled out freely after the operation is in place. This design is not interfered with by human will and can effectively prevent workers from operating incorrectly.

[0052] One working mode of the rotation-in-place locking device of this embodiment is as follows:

[0053] (1) The switching steps between the open state and the closed state, such as Figure 6 As stated, Figure 6 (a) in the figure indicates the closing state. Figure 6 (b) in the figure shows the opening state:

[0054] Step S1: Use external force to push the baffle plate 4 in the second direction so that the alignment hole 4a on the baffle plate 4 is aligned with the first operation hole 2a. When the baffle plate 4 slides, a locking assembly 52 on the left side starts to act. Specifically, the push column 523 of the locking assembly 52 pushes the elastic member 522 (torsion spring) and the slide plate 521 to move toward the chuck 51 along the second direction, and the latch portion 5211 at the front end of the slide plate 521 abuts against the outer circumference of the chuck 51.

[0055] Step S2: The staff member sequentially passes the operating handle 10 through the alignment hole 4a and the avoidance groove 9a on the limit plate 9 and inserts it into the first operating hole 2a, and then rotates the first operating rod 2. The rotation of the first operating rod 2 can drive other components to move synchronously. Specifically:

[0056] The second operating rod 3 rotates synchronously because the second operating rod 3 is connected to the first operating rod 2 via a gear;

[0057] The slider 6 moves synchronously in the first direction. When the slider 6 moves, the driving column 7 at the lower end of the slider 6 drives the spindle 1 to rotate synchronously, and the chuck 51 also rotates synchronously;

[0058] Step S3: When the slot 51a on the chuck 51 rotates to correspond to the latch portion 5211 at the front end of the slide plate 521, the latch portion 5211 is inserted into the slot 51a, and the latch portion 5211 simultaneously restricts the rotation of the chuck 51, the spindle 1, the first operating rod 2, and the second operating rod 3. Since the external staff cannot continue to rotate the first operating rod 2, the feedback of the operation of opening or closing the switch can be realized to the external staff, and at this time, the pawl 524 of the locking assembly 52 abuts against the blocking bar portion 5212 of the slide plate 521;

[0059] Step S4: When the opening or closing state is in place, the avoidance groove 9a of the limit plate 9 also swings to align with the operating handle 10, and the operating handle 10 is pulled out from the first operating hole 2a and the avoidance groove 9a. After the operating handle 10 is pulled out, the baffle 4 loses the restriction of the operating handle 10, resets under the action of the tension spring 525, and covers the two operating holes again.

[0060] (2) The switching steps between the open state and the grounded state are the same as the principle of switching between the open and closed states. Figure 7 As stated, Figure 7 (a) indicates the open state. Figure 7(b) in the figure shows the grounding state, which is as follows:

[0061] Step A1: Use external force to push the baffle plate 4 in the second direction so that the alignment hole 4a on the baffle plate 4 is aligned with the second operating hole 3a. When the baffle plate 4 slides, a locking assembly 52 on the right side starts to act. Specifically, the push column 523 of the locking assembly 52 pushes the elastic member 522 (torsion spring) and the slide plate 521 to move toward the chuck 51 along the second direction, and the latch portion 5211 at the front end of the slide plate 521 abuts against the outer circumference of the chuck 51.

[0062] Step A2: The staff member sequentially passes the operating handle 10 through the alignment hole 4a and the avoidance groove 9a on the limit plate 9 and inserts it into the second operating hole 3a, and then rotates the second operating rod 3. The rotation of the second operating rod 3 can drive other components to move synchronously. Specifically:

[0063] The first operating rod 2 rotates synchronously because the second operating rod 3 is connected to the first operating rod 2 via a gear;

[0064] The slider 6 moves synchronously in the first direction. When the slider 6 moves, the driving column 7 at the lower end of the slider 6 drives the spindle 1 to rotate synchronously, and the chuck 51 also rotates synchronously;

[0065] Step A3: When the slot 51a on the chuck 51 rotates to correspond to the latch portion 5211 at the front end of the slide plate 521, the latch portion 5211 is inserted into the slot 51a, and the latch portion 5211 simultaneously restricts the rotation of the chuck 51, the spindle 1, the first operating rod 2, and the second operating rod 3. Since the external staff cannot continue to rotate the second operating rod 3, the feedback that the operation of opening or grounding is in place can be realized to the external staff, and at this time, the pawl 524 of the locking assembly 52 abuts against the blocking bar portion 5212 of the slide plate 521;

[0066] Step A4: When the opening or grounding state is in place, the avoidance groove 9a of the limit plate 9 also swings to align with the operating handle 10, and the operating handle 10 is pulled out from the second operating hole 3a and the avoidance groove 9a. After the operating handle 10 is pulled out, the baffle 4 loses the restriction of the operating handle 10, resets under the action of the tension spring 525, and covers the two operating holes again.

[0067] The above is only a specific implementation of the present application. Those skilled in the art can clearly understand that for the convenience and simplicity of description, the specific working processes of the systems, modules and units described above can refer to the corresponding processes in the aforementioned method embodiments, and will not be repeated here. It should be understood that the protection scope of the present application is not limited to this. Any technician familiar with the technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed in this application, and these modifications or replacements should be included in the protection scope of this application.

Claims

1. A rotation-in-place locking device, characterized in that: It comprises a main shaft (1), a first operating rod (2), a second operating rod (3), a baffle (4) and a locking mechanism (5); The main shaft (1), the first operating rod (2) and the second operating rod (3) are distributed in a triangular shape and are arranged parallel to each other. The main shaft (1) is located below the first operating rod (2) and the second operating rod (3). The main shaft (1), the first operating rod (2) and the second operating rod (3) can rotate synchronously. The first operating rod (2) is provided with a first operating hole (2a), the second operating rod (3) is provided with a second operating hole (3a), and the axial direction of the first operating rod (2) is arranged in a first direction; The baffle (4) is located on one side of the first operating rod (2) and the second operating rod (3) along the first direction, and is used to block the first operating hole (2a) and the second operating hole (3a); the baffle (4) can slide in the second direction, and is provided with an alignment hole (4a), and the alignment hole (4a) is used to expose the first operating hole (2a) or the second operating hole (3a); The locking mechanism (5) comprises a chuck (51) and two locking assemblies (52); the chuck (51) is coaxially fixed on the main shaft (1), and at least two locking grooves (51a) are provided on the chuck (51); the two locking assemblies (52) are respectively arranged on two radial sides of the chuck (51); the locking assembly (52) comprises a slide plate (521), an elastic member (522) and a push column (523); the slide plate (521) is slidably arranged, and the sliding direction of the slide plate (521) is configured as the radial direction of the chuck (51), and the slide plate (521) is provided with a latch portion (5211) that cooperates with the locking groove (51a); the elastic member (522) is arranged on the slide plate (521); one end of the push column (523) is fixedly connected to the baffle (4), and the push column (523) is used to push the elastic member (522) and the slide plate (521) to move toward the chuck (51).

2. The rotation-in-place locking device according to claim 1, characterized in that: The invention also comprises a slider (6), a driving column (7), a first gear (8a) and a second gear (8b); the slider (6) is sleeved on the first operating rod (2) and the second operating rod (3), and the slider (6) and the second operating rod (3) are threadedly matched; the main shaft (1) is provided with a spiral groove (1a) spirally along its axial direction, the driving column (7) is provided at the lower end of the slider (6), and one end of the driving column (7) is inserted into the spiral groove (1a) for driving the main shaft (1) to rotate; the first gear (8a) is coaxially fixed on the first operating rod (2), and the second gear (8b) is coaxially fixed on the second operating rod (3), and the first gear (8a) and the second gear (8b) are meshed, and the main shaft (1), the first operating rod (2) and the second operating rod (3) are synchronously rotated by the slider (6), the driving column (7), the first gear (8a) and the second gear (8b).

3. The rotation-in-place locking device according to claim 1, characterized in that: The invention also comprises a first gear (8a), a second gear (8b) and a third gear (8c) which are meshed with each other; the first gear (8a) is coaxially fixed on the first operating rod (2), the second gear (8b) is coaxially fixed on the second operating rod (3), and the third gear (8c) is coaxially fixed on the main shaft (1); the main shaft (1), the first operating rod (2) and the second operating rod (3) are synchronously rotated by the first gear (8a), the second gear (8b) and the third gear (8c).

4. The rotation-in-place locking device according to claim 1, characterized in that: The locking assembly (52) further comprises a pawl (524) which is coaxially fixed on the first operating rod (2) or the second operating rod (3); a stop bar portion (5212) is provided on the slide plate (521); when the latch portion (5211) is inserted into the slot (51a), the pawl (524) abuts against the stop bar portion (5212) along its circumferential direction.

5. The rotation-in-place locking device according to any one of claims 1 to 4, characterized in that: The locking assembly (52) further comprises a tension spring (525), one end of which is fixedly arranged, and the other end of which is connected to the slide plate (521), and the extension and contraction direction of the tension spring (525) is configured as the sliding direction of the slide plate (521).

6. The rotation-in-place locking device according to claim 1, characterized in that: The elastic member (522) is configured as a torsion spring.

7. The rotation-in-place locking device according to claim 1, characterized in that: The end surface of the latch portion (5211) facing the chuck (51) is arranged as a curved surface, and the curvature of the curved surface matches the outer peripheral surface of the chuck (51).

8. The rotation-in-place locking device according to claim 1, characterized in that: The locking assembly (52) further comprises a guide column (526); the slide plate (521) is provided with a guide groove (521a); ​​the length direction of the guide groove (521a) is configured as the sliding direction of the slide plate (521); and the guide column (526) is inserted into the guide groove (521a).

9. The rotation-in-place locking device according to claim 1, characterized in that: The invention also comprises a limit plate (9); the limit plate (9) is coaxially fixed on the main shaft (1), and along a first direction, the limit plate (9) is located in front of the first operating hole (2a) and the second operating hole (3a); along the rotation direction of the main shaft (1), at least two avoidance grooves (9a) for avoiding the operating handle (10) are arranged on the limit plate (9), and a limit portion (91) for blocking the operating handle (10) is formed between two adjacent avoidance grooves (9a).

Images