Position locking mechanism and chassis cart

Abstract

The application relates to the field of low-voltage electrical technology, in particular to a position locking mechanism for a chassis vehicle of a drawer-type circuit breaker, the chassis vehicle comprising a fixed part, a sliding part and an indicating part, the fixed part being provided with an indicating mark, the sliding part being provided with a guide protrusion, the indicating part being provided with a spiral groove, and the guide protrusion being arranged in the spiral groove and matched with the spiral groove; when the sliding part moves forward and backward, the indicating part rotates around its own axis and cooperates with the indicating mark to indicate different working states; the position locking mechanism further comprises a limiting part arranged on the sliding part, the limiting part has a movement tendency towards the indicating part; the indicating part is provided with at least one locking structure, when the limiting part moves to the locking structure, the limiting part moves towards the locking structure to lock the indicating part; the position locking mechanism is simple in structure and can realize the position locking function. The application further provides a chassis vehicle comprising the position locking mechanism, which is simple in structure and can realize the position locking function.

Description

Technical Field

[0001] This invention relates to the field of low-voltage electrical technology, and more specifically to a position locking mechanism and a chassis vehicle including the position locking mechanism. Background Technology

[0002] Existing drawer-type universal circuit breakers all include a circuit breaker body and a drawer base. The circuit breaker body is movable and installed in the drawer base to achieve switching between the connection position and the test position.

[0003] Because existing drawer-type universal circuit breakers are large in size, the corresponding cabinets used to install them cannot be reduced in size, resulting in a large footprint. Furthermore, the large size and weight of the drawer-type universal circuit breakers make them difficult to move and install. To solve these problems, a chassis vehicle was designed to be directly installed inside the cabinet, thus eliminating the need for drawer bases.

[0004] To prevent user misoperation, the chassis vehicle needs to be equipped with a device to indicate and lock the position of the circuit breaker body, thereby improving product safety performance. Summary of the Invention

[0005] The purpose of this invention is to overcome the shortcomings of the prior art and provide a position locking mechanism that has a simple structure and can achieve the position locking function; it also provides a chassis vehicle that includes the position locking mechanism, which has a simple structure and can achieve the position locking function.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A position locking mechanism is used in the chassis of a drawer-type circuit breaker. The chassis includes a fixed part, a sliding part, and an indicator. The fixed part is provided with an indicator mark, the sliding part is provided with a guide protrusion, and the indicator is provided with a spiral groove. The guide protrusion is disposed in the spiral groove and cooperates with it. When the sliding part moves back and forth, the indicator rotates around its own axis and cooperates with the indicator mark to indicate different working states.

[0008] The position locking mechanism further includes a limiting member disposed on the sliding part, the limiting member having a tendency to move toward the indicator;

[0009] The indicator is provided with at least one locking structure. When the limiting member moves to the locking structure, the limiting member moves toward the locking structure to lock with the indicator.

[0010] Preferably, when the indicator is provided with multiple locking structures, each locking structure is arranged at intervals along the axial direction of the indicator, and the structures of each locking structure may be the same or different.

[0011] Preferably, the limiting member is slidably connected to the sliding part.

[0012] Preferably, the limiting member is provided with a limiting member sliding hole, and the sliding part is provided with a sliding shaft pin, which passes through the limiting member sliding hole.

[0013] Preferably, a spring is provided between the limiting member and the sliding part, and the spring applies a force to the limiting member so that the limiting member tends to slide towards the indicator.

[0014] Preferably, the locking structure is a first locking structure, which includes an indicator limiting groove. When the sliding part moves to the locking position, the limiting member moves toward the indicator and inserts into the indicator limiting groove to complete the locking.

[0015] Preferably, the first locking structure further includes a first unlocking structure, which includes a first idle groove and a first guide edge. The first idle groove is connected to the spiral groove, and the first guide edge is arranged parallel to the axial direction of the indicator on one side wall of the first idle groove. After the external force causes the indicator to continue to rotate by a preset angle in the rotation direction before locking, the first idle groove rotates in the circumferential direction of the indicator, so that the guide protrusion contacts the first guide edge.

[0016] Preferably, the indicator limiting groove is disposed at the end of the spiral groove.

[0017] Preferably, the locking structure is a second locking structure, which includes a wedge-shaped protrusion and a second guide edge. The wedge-shaped protrusion includes an inclined surface and a locking surface. The inclined surface is inclined along the axial direction of the indicator and forms a slope angle α with the axial direction of the indicator. The locking surface is perpendicular to the axial direction of the indicator and opposite to the slope angle α. The second guide edge is parallel to the wedge-shaped protrusion and is disposed in the spiral groove or at the end of the spiral groove. When the sliding part moves to the locking position in the locking direction, the guide protrusion moves along the second guide edge, and the limiting member moves closely against the inclined surface. After passing the inclined surface, it is blocked by the locking surface to achieve locking.

[0018] Preferably, the second locking structure includes a second unlocking structure, which includes a second idle groove that communicates with a spiral groove. One sidewall of the second idle groove is the second guide edge, and the other sidewall is a spiral extension edge. The spiral curvature of the spiral extension edge is adapted to the spiral groove. After the indicator continues to rotate a preset angle along the rotation direction before locking, the limiting member releases from the locking surface, and the guide protrusion adheres tightly to the spiral extension surface.

[0019] Preferably, the limiting member is provided with a relief groove, which is located on the side that cooperates with the indicator; after the external force causes the indicator to continue to rotate by a preset angle in the rotation direction before locking, the wedge-shaped protrusion is opposite to the relief groove, releasing the locking face from the limiting member.

[0020] A chassis vehicle including the aforementioned position locking mechanism.

[0021] The position locking mechanism of this invention has a simple structure and reliable operation. When used in a drawer-type circuit breaker, the limiting member and the indicating member cooperate to lock the position of the sliding part, thereby locking the position of the circuit breaker body and ensuring electrical safety. Moreover, the indicating member rotates as the position of the circuit breaker body changes, and cooperates with the indicating mark to indicate the position of the circuit breaker body.

[0022] Furthermore, the indicator can be rotated to release the lock from the limiting member, eliminating the need for a dedicated unlocking structure in the position locking mechanism of the present invention, which simplifies the structure of the position locking mechanism.

[0023] The chassis of this invention, used for the installation of universal circuit breakers, enables the switching of the circuit breaker body between the connection position and the test position; the chassis eliminates the need for the drawer base of the universal circuit breaker, which helps to reduce the volume of the complete cabinet where the universal circuit breaker is located; the chassis can lock the position of the circuit breaker body, ensuring the electrical safety of the operator and avoiding operator misoperation. Attached Figure Description

[0024] Figure 1 This is an exploded structural diagram of the chassis vehicle of the present invention;

[0025] Figure 2A This is the present invention. Figure 1 An enlarged structural diagram of part A;

[0026] Figure 2B This is the present invention. Figure 1 An enlarged structural diagram of the guide component in the diagram;

[0027] Figure 3 This is a structural schematic diagram of the position locking mechanism of the present invention, in which the limiting member is pushed up by the wedge-shaped protrusion;

[0028] Figure 4 This is a structural schematic diagram of the position locking mechanism of the present invention from a first-view perspective, showing the limiting member and the locking surface of the wedge-shaped protrusion limiting the engagement.

[0029] Figure 5 This is a structural schematic diagram of the position locking mechanism of the present invention from a second perspective, showing the limiting member and the locking surface of the wedge-shaped protrusion limiting the engagement.

[0030] Figure 6 This is a structural schematic diagram of the position locking mechanism of the present invention from a third-person perspective, showing the locking member and the wedge-shaped protrusion being released from locking.

[0031] Figure 7 This is a first structural schematic diagram of the indicator of the present invention;

[0032] Figure 8 This is the present invention. Figure 7 An enlarged structural diagram of part B shows the structure of the indicator protrusion;

[0033] Figure 9 This is a second structural schematic diagram of the indicator of the present invention;

[0034] Figure 10 This is a structural schematic diagram of the position locking mechanism of the present invention from a fourth perspective, showing the limiting member and the indicator member in a circumferential sidewall limiting fit.

[0035] Figure 11 This is a structural schematic diagram of the position locking mechanism of the present invention from a fifth perspective, showing the limiting member and the indicator member in a limiting groove limiting fit.

[0036] Figure 12 This is a structural schematic diagram of the position locking mechanism of the present invention from a sixth-angle perspective, showing the limiting member and the indicator member in a limiting groove limiting fit.

[0037] Figure 13 This is a schematic diagram of the position locking structure of the present invention from a seventh perspective. The limiting member and the indicator member's limiting groove are released from the limiting engagement, and the limiting member and the indicator member's circumferential sidewall are limited to the limiting engagement. Detailed Implementation

[0038] The following is in conjunction with the appendix Figure 1-13 The given embodiments further illustrate specific implementations of the position locking mechanism and chassis of the present invention. The position locking mechanism and chassis of the present invention are not limited to the descriptions in the following embodiments.

[0039] like Figure 1-13 As shown, the position locking mechanism of the present invention is used in the chassis of a drawer-type circuit breaker. The chassis includes a fixed part 1, a sliding part 2, and an indicator 3. The fixed part 1 is provided with an indicator mark 5, the sliding part 2 is provided with a guide protrusion 6-01, and the indicator 3 is provided with a spiral groove. The guide protrusion 6-01 is disposed in the spiral groove and cooperates with it. When the sliding part 2 moves along the axial direction of the indicator 3, it drives the guide protrusion 6-01 to slide relative to the spiral groove, thereby driving the indicator 3 to rotate around its own axis. The indicator 3 cooperates with the indicator mark 5 to indicate different working states. The position locking mechanism also includes a limiting member 7 disposed on the sliding part 2, which has a tendency to move towards the indicator 3. The indicator 3 is provided with at least one locking structure. When the limiting member 7 moves to the locking structure, the limiting member 7 moves towards the locking structure to lock with the indicator 3. Furthermore, an external force rotates the indicator 3, causing the locking structure of the indicator 3 to unlock from the limiting member 7.

[0040] The position locking mechanism of the present invention has a simple structure and reliable operation. When used in a drawer-type circuit breaker, the limiting member 7 and the indicating member 3 cooperate to lock the position of the sliding part 2, thereby locking the position of the circuit breaker body and ensuring electrical safety. Moreover, the indicating member 3 rotates as the position of the circuit breaker body changes, and cooperates with the indicating mark 5 to indicate the position of the circuit breaker body.

[0041] Combination Figure 3-13 As shown, when the indicator 3 is provided with multiple locking structures, each locking structure is spaced apart along the axial direction of the indicator 3, and the structures of each locking structure may be the same or different. It should be noted that the number of locking structures can be adjusted according to actual needs. For example, the number of locking structures can be one, used to lock the circuit breaker body of the drawer-type circuit breaker when it moves to the working position, wherein the working position can be the connection position, the test position, the disconnect position, or other preset positions; or, the number of locking structures can be two, locking them separately when the circuit breaker body of the drawer-type circuit breaker moves to different working positions; or, the number of locking structures can be three or more.

[0042] like Figure 3-6 As shown in Figures 10-13, the limiting member 7 is slidably connected to the sliding part 2. Further, the limiting member 7 is provided with a sliding hole 7-1, and the sliding part 2 is provided with a sliding pin 8, which passes through the sliding hole 7-1. Further, the sliding hole 7-1 of the limiting member can be a slotted hole or a strip-shaped hole, etc., with multiple sliding pins 8 arranged side-by-side at intervals within the slotted hole or strip-shaped hole, the distance between two outermost sliding pins 8 being less than the length of the slotted hole. Of course, the sliding connection can also adopt other sliding structures, such as a sliding structure in which a concave guide groove and a protruding guide rail cooperate with each other.

[0043] like Figure 3-6 As shown in Figures 10-13, a spring 9 is provided between the limiting member 7 and the sliding part 2. The spring 9 applies a force to the limiting member 7, causing the limiting member 7 to tend to slide towards the indicator 3. Further, the spring 9 is a tension spring, with its two ends connected to the limiting member 7 and the sliding pin 8, respectively. Of course, the spring 9 can also be a torsion spring or a compression spring, as long as it applies a force to the limiting member 7 in a suitable manner to cause it to tend to slide towards the indicator 3.

[0044] Specifically, such as Figure 3-6 As shown in 10-13, the moving direction of the limiting member 7 is perpendicular to the axial direction of the indicator 3.

[0045] In another embodiment, the limiting member 7 can also be rotatably mounted on the sliding part 2, and the spring 9 needs to apply a force to the limiting member 7 so that it tends to swing toward the indicator 3.

[0046] like Figure 1 , 3 As shown in Figures 6 and 10-13, the guide member 6 further includes a guide plate 6-00, which has a guide hole for the indicator member 3 to pass through. A guide member protrusion 6-01 is disposed on the inner wall of the guide hole. Further, as... Figure 2B , 3 As shown in -4 and 12, the guide protrusion 6-01 includes a protrusion connecting part and a protrusion guiding part. The guide protrusion 6-01 is connected to the guide plate 6-00 through the protrusion connecting part. The cross-section of the protrusion guiding part is a fan-shaped structure, which includes two guiding surfaces 6-011, which respectively drive and cooperate with the two spiral surfaces of the spiral groove.

[0047] In other embodiments, the guide protrusion 6-01 may also be provided on the side of the guide plate 6-00 facing or away from the limiting member 7.

[0048] like Figure 9-13 As shown, the locking structure of the indicator 3 is a first locking structure, which includes an indicator limiting groove 3-05. When the sliding part 2 moves to the locking position, the limiting member 7 moves towards the indicator 3 and inserts into the indicator limiting groove 3-05 to complete the locking. A pair of sidewalls of the indicator limiting groove 3-05 act as stops, respectively engaging with the limiting member 7 to prevent the sliding part 2 from moving along the axial direction of the indicator 3, resulting in a good locking effect. Specifically, as shown... Figure 11-12 As shown, the indicator limiting groove 3-05 includes a first limiting groove sidewall 3-051 and a second limiting groove sidewall 3-053 arranged at relative intervals. When the limiting member 7 is inserted into the indicator limiting groove 3-05, the first limiting groove sidewall 3-051 and the second limiting groove sidewall 3-053 are respectively located on both sides of the limiting member 7 to prevent the sliding part 2 from moving along the axial direction of the indicator 3. When the limiting member 7 is inserted into the indicator limiting groove 3-05, it will hit the indicator 3 and make an impact sound. This indicates that the limiting member 7 and the indicator limiting groove 3-05 are reliably engaged, and that the sliding part 2 has moved to the locked position, thus avoiding damage to the position locking mechanism due to excessive operation by the operator.

[0049] like Figure 9-13As shown, the first locking structure further includes a first unlocking structure, which includes a first idle groove G1 and a first guide edge 3-06. The first idle groove G1 communicates with the spiral groove, and the first guide edge 3-06 is arranged parallel to the axial direction of the indicator 3 on one side wall of the first idle groove G1. After the indicator 3 continues to rotate by a preset angle along the rotation direction before locking, it rotates circumferentially within the first idle groove G1, causing the guide protrusion 6-01 to contact the first guide edge 3-06. Simultaneously, due to the rotation of the indicator 3, the limiting member 7 disengages from the indicator limiting groove 3-05. The rotation of the indicator 3 releases the locking engagement with the limiting member 7, thus eliminating the need for a dedicated unlocking structure in the position locking mechanism of this invention, simplifying the structure of the position locking mechanism. Furthermore, in conjunction with... Figure 11-13 As shown, the indicator limiting groove 3-05 also includes a limiting groove bottom wall 3-052. The two ends of the limiting groove bottom wall 3-052 are respectively bent and connected to the first limiting groove side wall 3-051 and the second limiting groove side wall 3-053. When the indicator 3 rotates, the limiting groove bottom wall 3-052 presses against the limiting member 7, causing it to disengage from the indicator limiting groove 3-05 and abut against the circumferential side wall 3-04 of the indicator 3. Further, the limiting groove bottom wall 3-052 is preferably perpendicularly connected to the first limiting groove side wall 3-051 and the second limiting groove side wall 3-053, respectively. Both the first limiting groove side wall 3-051 and the second limiting groove side wall 3-052 are perpendicular to the axial direction of the indicator 3. Specifically, as shown... Figure 11 As shown, the limiting member 7 is inserted into the indicator limiting groove 3-05. When the indicator 3 is rotated clockwise, the bottom wall 3-052 of the limiting groove 3-05 presses against the limiting member 7, causing the limiting member 7 to disengage from the indicator limiting groove 3-05 and enter... Figure 13 The state shown.

[0050] like Figure 9-13 As shown, the indicator limiting groove 3-05 is disposed at the end of the spiral groove.

[0051] like Figure 3-8As shown, the locking structure is a second locking structure, which includes a wedge-shaped protrusion 3-03 and a second guide edge 3-023. The wedge-shaped protrusion 3-03 includes an inclined surface 3-031 and a locking surface 3-032. The inclined surface 3-031 is inclined along the axial direction of the indicator 3 and forms a slope angle α with the axial direction of the indicator 3. The locking surface 3-032 is perpendicular to the axial direction of the indicator 3 and opposite to the slope angle α. The second guide edge 3-023 is parallel to the wedge-shaped protrusion 3-03 and is disposed in the spiral groove or at the end of the spiral groove. When the sliding part 2 moves to the locking position in the locking direction, the guide protrusion 6-01 moves along the second guide edge 3-023, and the limiting member 7 moves close to the inclined surface 3-031. After passing the inclined surface 3-031, it is limited by the locking surface 3-032, thus achieving locking. The inclined surface 3-031 can be a plane that is entirely inclined, or it can be a combination of a plane and a curved surface in the later part of the stroke. The second locking structure eliminates the need for slots or holes in the indicator 3, which helps maintain the strength of the indicator 3. Since the wedge-shaped protrusion 3-03 can only limit the position of the limiting member 7 in one direction, the second locking structure is suitable for placement at the end of the indicator 3, such as the initial or final position. Specifically, as... Figure 3-4 As shown, during the process of the sliding part 2 moving towards the locking position in the locking direction, the inclined surface 3-031 gradually lifts the limiting member 7, causing it to slide away from the indicator 3. When the sliding part 2 moves to the locking position, the limiting member 7 disengages from the inclined surface 3-031 and moves towards the indicator 3, so that the limiting member 7 is located on the side of the locking surface 3-032 and engages with it to achieve locking. Moreover, when the limiting member 7 disengages from the inclined surface 30-31 and moves towards the indicator 3, it will strike the indicator 3 and make a striking sound. This indicates that the limiting member 7 and the wedge-shaped protrusion 3-03 are reliably engaged, and that the sliding part 2 has moved to the locking position, thus avoiding damage to the position locking mechanism due to excessive operation by the operator.

[0052] like Figure 3-8 As shown, the second locking structure also includes a second unlocking structure, which includes a second idle groove G2 connected to a spiral groove. One sidewall of the second idle groove G2 is a second guide edge 3-023, and the other sidewall is a spiral extension edge. The spiral curvature of the spiral extension edge is adapted to the spiral groove. After the indicator 3 continues to rotate a preset angle along the rotation direction before locking, the limiting member 7 releases its block against the locking surface 3-032, and the guide protrusion 6-01 abuts against the spiral extension surface. Furthermore, the limiting member 7 is provided with a clearance groove 7-2, which is located on the side that cooperates with the indicator 3. After the indicator 3 continues to rotate a preset angle along the rotation direction before locking, the wedge-shaped protrusion 3-03 faces the clearance groove 7-2, releasing the blockage of the locking surface 3-032 against the limiting member 7.

[0053] like Figure 3-5 As shown in Figure 10, the spiral groove includes a pair of spiral surfaces spaced apart from each other, namely a first spiral surface 3-021 and a second spiral surface 3-022; when the sliding part 2 moves along the axial direction of the indicator 3, it drives the guide protrusion 6-01 to engage with the first spiral surface 3-021 and the second spiral surface 3-022 respectively, thereby driving the indicator 3 to rotate in opposite directions. Further, as... Figure 7 and 9 As shown, the first guide edge 3-06 and the second guide edge 3-023 are respectively connected to both ends of the second spiral surface 3-022; the spiral extension edge is connected to one end of the first spiral surface 3-021.

[0054] like Figure 3-6 As shown, this is one embodiment of the limiting member 7: The limiting member 7 includes a limiting member main board 7-0 and a limiting member spring connecting part 7-3. The limiting member spring connecting part 7-3 is disposed at one end of the limiting member main board 7-0. A limiting member clearance hole 7-2 is disposed in the middle of the other end of the limiting member main board 7-0. A limiting member sliding hole 7-1 is disposed in the middle of the limiting member main board 7-0. The limiting member waist-shaped hole 7-1 is a waist-shaped hole that extends along the moving direction of the limiting member 7.

[0055] like Figure 1-2A As shown, the position locking mechanism of the present invention has a fixing part 1 with a fixing part opening through which the indicator 3 passes, and an indicator mark 5 is provided on the outer side of one end of the fixing part opening.

[0056] like Figure 1-2A As shown, the position locking mechanism of the present invention also includes a knob 4, which is disposed at one end of the indicator 3 and rotates synchronously with it. The knob 4 includes a pointer structure 4-0, which cooperates with the indicator mark 5 to indicate position information, thereby enabling the operator to more intuitively grasp the current status of the position locking mechanism.

[0057] like Figure 1-2A As shown, the indicator 5 is a circular indicator.

[0058] like Figure 1-2A As shown, the knob 4 includes a pointer structure 4-0, a knob disk 4-1, and a knob protrusion 4-2 connected in sequence. The indicator 3 includes an indicator connection hole, and the knob protrusion 4-2 is inserted into the indicator connection hole.

[0059] like Figure 3-13As shown, the position locking mechanism of the present invention preferably has two locking structures on its indicator 3, namely a first locking structure and a second locking structure disposed at both ends of the indicator 3. The first locking structure and the second locking structure correspond to two locking positions of the sliding part 2, namely the first locking position and the second locking position, which also correspond to two positions of the drawer-type circuit breaker, such as the connection position and the test position. Furthermore, the first idle groove G1 and the second idle groove G2 are disposed on both sides of the spiral groove and communicate with both ends of the spiral groove.

[0060] like Figure 4-5 As shown, when the limiting member 7 is locked with the second locking structure, the guide member 6 also engages with the side wall of the second idle groove G2, which is perpendicular to the axial direction of the indicator member 3. The limiting member 7 engages with the second locking structure to prevent the sliding part 2 from moving in the direction of the first locking structure, and the guide member 6 engages with the side wall of the second idle groove G2 to prevent the sliding part 2 from continuing to move in the direction of the second locking structure.

[0061] In other embodiments, the two locking structures at both ends of the indicator 3 may also be two first locking structures.

[0062] In other embodiments, the locking structure may also be an electronic locking structure.

[0063] like Figure 1 As shown, the present invention also discloses a chassis vehicle, which includes the aforementioned position locking mechanism; the chassis vehicle includes a fixed part 1 and a movable part 2 capable of moving relative to the fixed part 1. The fixed part 1 is fixedly installed on the cabinet body, and the fixed part 1 and the movable part 2 are driven together by a screw drive structure to make the movable part 2 move relative to the fixed part 1; the indicator 3 is rotatably disposed on the fixed part 1, and the limiting member 7 of the position locking mechanism is disposed on the movable part 2 to make the limiting member 7 move relative to the indicator 3 along the axial direction of the indicator 3. Further, the chassis vehicle of the present invention is used for the installation of a universal circuit breaker. The circuit breaker body of the universal circuit breaker is disposed on the movable part 2 and moves with the movement of the movable part 2, thereby realizing the switching of the circuit breaker body between the connection position and the test position; the movable part 2 is movablely disposed in the complete cabinet or distribution cabinet via guide rails.

[0064] Specifically, such as Figure 1 As shown, the guide 6 is fixedly mounted on the moving part 2, the sliding pin 8 is fixedly mounted on the moving part 2, the limiting member 7 is movably mounted on the moving part 2 via the sliding pin 8, the indicator 3 is arranged parallel to the lead screw of the lead screw drive structure, and the sliding direction of the limiting member 7 is arranged perpendicular to the axial direction of the indicator 3.

[0065] The connection position and test position of the circuit breaker body correspond to the first locking position and the second locking position of the position locking mechanism, respectively. That is, when the circuit breaker body moves to the connection position, the limiting member 7 moves to the first locking position at the same time to engage with the first locking structure, thereby locking the circuit breaker body in the connection position; or, when the circuit breaker body moves to the test position, the limiting member 7 moves to the second locking position at the same time to engage with the second locking structure, thereby locking the circuit breaker body in the test position, ensuring the electrical safety of the operator and avoiding operator misoperation.

[0066] The above description, in conjunction with specific preferred embodiments, provides a further detailed explanation of the present invention. It should not be construed that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art, various simple deductions or substitutions can be made without departing from the concept of the present invention, and all such modifications and substitutions should be considered within the scope of protection of the present invention.

Claims

1. A position locking mechanism for a chassis of a drawer-type circuit breaker, the chassis comprising a fixed part (1), a sliding part (2), and an indicator (3), wherein the fixed part (1) is provided with an indicator mark (5), the sliding part (2) is provided with a guide protrusion (6-01), and the indicator (3) is provided with a spiral groove, the guide protrusion (6-01) being disposed within the spiral groove and engaging with it; when the sliding part (2) moves back and forth, the indicator (3) rotates around its own axis and engages with the indicator mark (5) to indicate different working states; characterized in that: The position locking mechanism also includes a limiting member (7) disposed on the sliding part (2), the limiting member (7) having a tendency to move toward the indicator (3); a spring (9) is provided between the limiting member (7) and the sliding part (2), the spring (9) applies a force to the limiting member (7), causing the limiting member (7) to have a tendency to move toward the indicator (3); The indicator (3) is provided with at least one locking structure. When the limiting member (7) moves to the locking structure, the limiting member (7) moves toward the locking structure to lock with the indicator (3). The indicator (3) continues to rotate in the rotation direction before locking to release the locking engagement with the limiting member (7).

2. The position locking mechanism according to claim 1, characterized in that: When the indicator (3) is provided with multiple locking structures, each locking structure is arranged at intervals along the axial direction of the indicator (3), and the structures of each locking structure are the same or different.

3. The position locking mechanism according to claim 1, characterized in that: The limiting member (7) is slidably connected to the sliding part (2).

4. The position locking mechanism according to claim 3, characterized in that: The limiting member (7) is provided with a limiting member sliding hole (7-1), and the sliding part (2) is provided with a sliding shaft pin (8), which passes through the limiting member sliding hole (7-1).

5. The position locking mechanism according to claim 1, characterized in that: The locking structure is a first locking structure, which includes an indicator limiting groove (3-05). When the sliding part (2) moves to the locking position, the limiting part (7) moves toward the indicator (3) and inserts into the indicator limiting groove (3-05) to complete the locking.

6. The position locking mechanism according to claim 5, characterized in that: The first locking structure also includes a first unlocking structure, which includes a first idle groove (G1) and a first guide edge (3-06). The first idle groove (G1) is connected to the spiral groove. The first guide edge (3-06) is arranged parallel to the axial direction of the indicator (3) on one side wall of the first idle groove (G1). After the external force causes the indicator (3) to continue to rotate by a preset angle in the rotation direction before locking, the first idle groove (G1) rotates in the circumferential direction of the indicator (3), so that the guide protrusion (6-01) contacts the first guide edge (3-06).

7. The position locking mechanism according to claim 6, characterized in that: The indicator limiting groove (3-05) is located at the end of the spiral groove.

8. The position locking mechanism according to claim 1, characterized in that: The locking structure is a second locking structure, which includes a wedge-shaped protrusion (3-03) and a second guide edge (3-023). The wedge-shaped protrusion (3-03) includes an inclined surface (3-031) and a locking surface (3-032). The inclined surface (3-031) is inclined along the axial direction of the indicator (3) and forms a slope angle α with the axial direction of the indicator (3). The locking surface (3-032) is perpendicular to the axial direction of the indicator (3) and opposite to the slope angle α. The second guide edge (3-023) is parallel to the wedge-shaped protrusion (3-03) and is located in the spiral groove or at the end of the spiral groove. When the sliding part (2) moves to the locking position in the locking direction, the guide protrusion (6-01) moves along the second guide edge (3-023), and the limiting part (7) moves close to the inclined surface (3-031). After passing the inclined surface (3-031), it is blocked by the locking surface (3-032) to achieve locking.

9. The position locking mechanism according to claim 8, characterized in that: The second locking structure includes a second unlocking structure, which includes a second idle groove (G2) that is connected to a spiral groove. One sidewall of the second idle groove (G2) is the second guide edge (3-023), and the other sidewall is a spiral extension edge. The spiral curvature of the spiral extension edge is adapted to the spiral groove. After the indicator (3) continues to rotate a preset angle along the rotation direction before locking, the limiting member (7) releases from the locking surface (3-032), and the guide protrusion (6-01) adheres to the spiral extension surface.

10. The position locking mechanism according to claim 8, characterized in that: The limiting member (7) is provided with a relief groove (7-2), which is located on the side that cooperates with the indicator (3). When the external force causes the indicator (3) to continue to rotate by a preset angle in the rotation direction before locking, the wedge protrusion (3-03) is opposite to the relief groove (7-2), and the locking surface (3-032) is released from blocking the limiting member (7).

11. A chassis vehicle, characterized in that, It includes the position locking mechanism as described in any one of claims 1-10.

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