Measuring device for measuring the engagement depth of stationary contact and moving contact

Abstract

The present invention relates to a measuring device for measuring the meshing depth of a static contact and a moving contact, comprising a bracket, a chassis vehicle arranged at the bottom of the bracket for driving the bracket to move horizontally forward and backward relative to the position of each static contact in the switch cabinet and enter and exit the switch cabinet body, and one or more detection components arranged on the bracket and corresponding to the positions of each static contact in the switch cabinet for measuring the meshing depth of each moving contact and the static contact; the device can quickly and easily measure the meshing depth of the static contact and the moving contact in the handcart chamber, and can prevent the operating reliability of the switch cabinet from being affected due to the incorrect installation length of the static contact and the moving contact in the handcart chamber. It can know for sure how much the meshing is too deep or too short, and then it can be adjusted purposefully according to needs.

Description

Technical Field

[0001] The invention relates to a measuring device for measuring the meshing depth of a stationary contact and a moving contact. Background Art

[0002] The detection of the meshing depth of the moving contact and the static contact in the trolley room of the switch cabinet is extremely important, which is directly related to whether the switch equipment can operate safely. Since the static contact of the switch cabinet is installed in a narrow and long contact box, it is extremely inconvenient to measure the meshing depth of the static contact and the moving contact in the trolley room after installation. In order to prevent the length of the moving contact and the static contact in the trolley room from being configured incorrectly during production and installation, affecting the meshing depth of the moving and static contacts of the trolley, it has become an urgent task to provide a measuring device that can measure the meshing depth of the static contact and the moving contact after installation. Summary of the invention

[0003] In order to solve the above problems existing in the prior art, the present invention provides a measuring device for measuring the meshing depth of a static contact and a moving contact in a trolley chamber. The device can quickly and easily measure the meshing depth of the static contact and the moving contact in the trolley chamber, and can prevent the operating reliability of the switch cabinet from being affected due to incorrect installation lengths of the static contact and the moving contact in the trolley chamber.

[0004] The present invention is achieved through the following technical solutions:

[0005] A measuring device for measuring the meshing depth of a static contact and a moving contact, comprising a bracket, a chassis vehicle provided at the bottom of the bracket and used to drive the bracket to move back and forth laterally relative to the position of each static contact in the switch cabinet and enter and exit the switch cabinet body, and one or more detection components provided on the bracket and corresponding to the position of each static contact in the switch cabinet and used to measure the meshing depth of each moving contact and the static contact;

[0006] Each set of detection components includes a measuring shaft, a sleeve, a return spring and a contact block.

[0007] The sleeve is fixedly mounted on the bracket and its axial extension direction is parallel to the front and rear lateral movement direction of the bracket. The front end of the measuring shaft is fixedly connected to the contact block. The measuring shaft extends from the front end of the sleeve through the axial hole of the sleeve to the rear end of the sleeve. The rear end of the measuring shaft can extend from the rear end of the sleeve. The reset spring is sleeved outside the measuring shaft and connected between the contact block and the sleeve. When the contact block is not subjected to the external force of the movement of the rear end of the vector shaft, the reset spring is in a naturally stretched state, and the rear end of the measuring shaft is located in the rear end port of the sleeve. When the contact block is subjected to the external force of the movement of the rear end of the vector shaft, the reset spring is compressed, and the rear end of the measuring shaft is exposed from the rear end port of the sleeve. A scale extending in a parallel axial direction for marking the sliding distance of the measuring shaft is provided on the outer peripheral wall of the rear end of the measuring shaft.

[0008] A limit groove is provided on the side wall of the sleeve, which passes through the inner and outer surfaces of the side wall and extends in the axial direction. A limit pin is fixedly connected to the side wall of the measuring shaft and is movably inserted in the limit groove to limit the axial movement stroke of the measuring shaft relative to the sleeve. A travel trigger switch is provided at the bottom of the chassis vehicle. When the chassis vehicle runs to the set detection position where the contact block contacts the static contact, the travel trigger switch can be triggered to stop the chassis vehicle from running.

[0009] When in use, move the chassis vehicle toward the static contact. When the contact block contacts the static contact, the reset spring is in a natural state, the limit pin is located at the front end of the limit slot, and the rear end of the measuring shaft is exactly located at the tail end of the sleeve. When the chassis vehicle continues to move toward the static contact until it is in place, the tail end of the measuring shaft is exposed from the tail end of the sleeve. If the tail end of the measuring shaft is exposed too short, the engagement depth of the moving contact and the static contact is too shallow. If the tail end of the measuring shaft is exposed too long, the engagement depth of the moving contact and the static contact is too deep. Just within a certain range, the engagement depth of the moving contact and the static contact is just right. The scale for marking the sliding distance of the measuring shaft can be colored red if it is too long or too short, and the just right range can be set to green, which is more eye-catching. In addition, the specific value of how long the static contact is can be known through the scale of the exposed third area red area.

[0010] In order to make the meshing depth more conspicuous during use: each set of measuring components also includes a display light assembly, which includes a display light arranged at the rear end of the bracket and located outside the rear end port of the shaft sleeve shaft hole, a battery assembly providing power for the display light, a micro switch mounting plate arranged on the outer side wall of the shaft sleeve, and a micro switch fixed on the micro switch mounting plate, wherein the micro switch, the display light and the battery assembly are connected by wires to form a control circuit for controlling the display light switch;

[0011] The micro switch mounting plate is arranged on the vertical upper side or lower side of the limit slot, the trigger button of the micro switch mounting plate extends to the upper side or lower side edge position of the middle section of the limit slot, and the limit pin sleeve is provided with a contact sleeve. When the contact sleeve moves to the middle section of the limit slot together with the limit pin, it can contact the button of the micro switch, so that the micro switch connects the control circuit of the display light and turns on the display light; when the contact sleeve moves to a position outside the middle section of the limit slot together with the limit pin and separates from the button of the micro switch, the micro switch disconnects the control circuit of the display light and turns off the display light.

[0012] Furthermore, the contact sleeve is a hollow cylindrical sleeve placed on the outer wall of the limiting pin, and the bottom of the button of the micro switch is provided with a contact head whose outer diameter gradually decreases during the process of extending from away from the limiting groove to close to the limiting groove.

[0013] Furthermore, the outer peripheral wall at the tail end of the measuring shaft is provided with different color marking areas at different length positions at the location where the scale is provided, depending on whether the extended length of the measuring shaft meets the detection requirements.

[0014] Furthermore, at least two automatic adjustment devices are respectively arranged on each of the longitudinal sides of the chassis vehicle for guiding the forward and backward movement of the bracket relative to the position of each static contact in the switch cabinet and enabling the crossbars of each group of detection components on the bracket entering the switch cabinet to be coaxial with the standard installation axis position of the corresponding static contact, and each group of automatic adjustment devices includes a U-shaped plate, a first guide shaft, a reset spring, a second guide shaft and a guide wheel.

[0015] The U-shaped plate is fixedly connected to the chassis and includes a first support plate vertically arranged on both longitudinal sides close to the chassis and extending in the transverse direction, a second support plate vertically arranged on both longitudinal sides away from the chassis and extending in the transverse direction, and a third support plate extending in the longitudinal direction and connected between the first support plate and the second support plate, wherein the second support plate is provided with a first guide hole penetrating both longitudinal sides of the plate body, the first support plate is provided with a second guide hole penetrating both longitudinal sides of the plate body, and the second guide hole and the first guide hole are coaxially arranged in the longitudinal direction; one end of the second guide shaft is fixedly connected to the first guide shaft, and the other end extends out of the second guide hole and is rotatably connected to the guide wheel through a vertically arranged mandrel, and the other end of the first guide shaft extends out of the first guide hole and is provided with a limiting outer flange whose outer diameter is greater than the inner diameter of the first guide hole at the outer peripheral wall position near the end; the reset spring is sleeved on the outer peripheral wall of the first guide shaft and presses between the second guide shaft and the second support plate, so that the guide wheel installed on the second guide shaft can extend outward from the notch of the side slot hole when no external force is applied.

[0016] Furthermore, a guide groove extending laterally and matching the position and size of the guide wheel of the automatic adjustment device is provided on the cabinet side wall of the switch cabinet.

[0017] Furthermore, the first guide hole is a circular hole, and the second guide hole is a regular polygonal hole.

[0018] Furthermore, the first guide shaft is a circular shaft inserted into the first guide hole, and the second guide shaft is a regular polygonal shaft inserted into the second guide hole.

[0019] Compared with the prior art, the present invention has the following beneficial effects: the device can quickly and easily measure the meshing depth between the static contact and the moving contact in the trolley chamber, and can prevent the operating reliability of the switch cabinet from being affected by the incorrect installation length of the static contact and the moving contact in the trolley chamber. It can determine how much the meshing is too deep or too short, and then can be adjusted purposefully according to needs.

[0020] An automatic adjusting device is provided, which can ensure that the base moves within its track and adjust its position when there is a slight deviation. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a front view of a measuring device for measuring the meshing depth between a stationary contact and a moving contact in a trolley chamber according to Embodiment 1 of the present invention;

[0022] Figure 2 It is a left view of a measuring device for measuring the meshing depth between a stationary contact and a moving contact in a trolley chamber according to Embodiment 1 of the present invention;

[0023] Figure 3 1 is a top view of a measuring device for measuring the engagement depth between a stationary contact and a moving contact in a trolley chamber according to embodiment 1 of the present invention.

[0024] Figure 4 It is a schematic diagram of the measuring device for measuring the meshing depth between the stationary contact and the moving contact in the trolley chamber of the present invention in the first embodiment, in which the stationary contact is not in contact;

[0025] Figure 5 yes Figure 4 A1 enlarged schematic diagram;

[0026] Figure 6 yes Figure 4 A magnified schematic diagram of B1;

[0027] Figure 7 It is a schematic diagram of the contact between the measuring device for measuring the meshing depth between the stationary contact and the moving contact in the trolley chamber and the stationary contact in the first embodiment of the present invention;

[0028] Figure 8 yes Figure 7 A2 enlarged schematic diagram;

[0029] Fig. 9 yes Figure 7 A magnified schematic diagram of B2;

[0030] Fig.10 is a schematic diagram showing the circuit connections of the light assembly;

[0031] Fig.11 It is a structural schematic diagram of the automatic adjustment device;

[0032] Fig.12 It is a structural schematic diagram of an automatic adjustment device. DETAILED DESCRIPTION

[0033] The present invention will be further described below in conjunction with specific embodiments and accompanying drawings.

[0034] Example 1

[0035] like Figure 1-12 The measuring device for measuring the meshing depth of the static contact and the moving contact shown in the figure comprises a bracket 2, a chassis 1 arranged at the bottom of the bracket 2 and used to drive the bracket 2 to move horizontally forward and backward relative to the position of each static contact in the switch cabinet and enter and exit the switch cabinet body, and one or more detection components 3 arranged on the bracket 2 and corresponding to the position of each static contact 5 in the switch cabinet and used to measure the meshing depth of each moving contact and the static contact 5;

[0036] Each detection assembly 3 includes a measuring shaft 3-1, a shaft sleeve 3-2, a return spring 3-3 and a contact block 3-4.

[0037] The sleeve 3-2 is fixedly mounted on the bracket 2 and its axial extension direction is parallel to the front and rear lateral movement direction of the bracket 2. The front end of the measuring shaft 3-1 is fixedly connected to the contact block 3-4. The measuring shaft 3-1 extends from the front end of the sleeve 3-2 through the axial hole of the sleeve 3-2 to the rear end of the sleeve 3-2, and the rear end of the measuring shaft 3-1 can extend from the rear end of the sleeve 3-2; the reset spring 3-3 is sleeved outside the measuring shaft 3-1 and connected between the contact block 3-4 and the sleeve 3-2. When the contact block 3-4 is not subjected to the external force of the movement of the rear end of the vector shaft 3-1, the reset spring 3-3 is in a naturally stretched state, and the rear end of the measuring shaft 3-1 is located in the rear end port of the sleeve 3-2. When the contact block 3-4 is subjected to the external force of the movement of the rear end of the vector shaft 3-1, the reset spring 3-3 is compressed, and the rear end of the measuring shaft 3-1 is exposed from the sleeve 3-2. The tail end of the measuring shaft 3-1 is provided with a scale 3-5 extending in a parallel axial direction and used to mark the sliding distance of the measuring shaft 3-1.

[0038] A limit groove 3-2-1 is provided on the side wall of the sleeve 3-2, which passes through the inner and outer surfaces of the side wall and extends in the axial direction. A limit pin 3-6 is fixedly connected to the side wall of the measuring shaft 3-1 and is movably inserted in the limit groove 3-2-1 to limit the axial movement stroke of the measuring shaft 3-1 relative to the sleeve 3-2. A stroke trigger switch 6 is provided at the bottom of the chassis vehicle 1. When the chassis vehicle 1 runs to the set detection position where the contact block 3-4 contacts the static contact 5, the stroke trigger switch 6 can be triggered to stop the chassis vehicle 1 from running.

[0039] When in use, move the chassis vehicle toward the static contact. When the contact block 3-4 contacts the static contact, the reset spring 3-3 is in a natural state, the limit pin 3-6 is located at the front end of the limit groove 3-2-1, and the rear end of the measuring shaft is just located at the tail end of the sleeve 3-2. When the chassis vehicle continues to move toward the static contact until it is in place, the tail end of the measuring shaft 3-1 is exposed from the tail end of the sleeve 3-2. If the tail end of the measuring shaft 3-1 is exposed too short, the meshing depth of the moving contact and the static contact is too shallow. If the tail end of the measuring shaft 3-1 is exposed too long, the meshing depth of the moving contact and the static contact is too deep. Just within a certain range, the meshing depth of the moving contact and the static contact is just right. The scale 3-5 marking the sliding distance of the measuring shaft can be colored red if it is too long or too short, and the just right range can be set to green, which is more eye-catching. In addition, the specific value of how long the static contact is can be known through the scale of the exposed third area red area.

[0040] In order to make the meshing depth more conspicuous during use: each set of measuring components 3 also includes a display light assembly 3-7, which includes a display light 3-7-1 arranged at the rear end of the bracket and located outside the rear end port of the shaft hole of the shaft sleeve 3-2, a battery assembly 3-7-2 providing power for the display light 3-7-1, a micro switch mounting plate 3-7-4 arranged on the outer side wall of the shaft sleeve 3-2, and a micro switch 3-7-5 fixed on the micro switch mounting plate 3-7-4, and the micro switch 3-7-5, the display light 3-7-1 and the battery assembly 3-7-2 are connected by wires to form a control circuit for controlling the switch of the display light 3-7-1;

[0041] The micro switch mounting plate 3-7-4 is arranged on the vertical upper side or lower side of the limit slot 3-2-1, and the trigger button of the micro switch mounting plate 3-7-4 extends to the upper side or lower side edge position of the middle section of the limit slot 3-2-1. The limit pin 3-6 outer shell is provided with a contact outer shell 3-7-6. When the contact outer shell 3-7-5 moves to the middle section of the limit slot 3-2-1 together with the limit pin 3-6, it can contact with the button of the micro switch 3-7-5, so that the micro switch 3-7-5 connects the control circuit of the display light 3-7-1 and turns on the display light 3-7-1; when the contact outer shell 3-7-5 moves to a position outside the middle section of the limit slot 3-2-1 together with the limit pin 3-6 and is separated from the button of the micro switch 3-7-5, the micro switch 3-7-5 disconnects the control circuit of the display light 3-7-1 and turns off the display light 3-7-1.

[0042] Furthermore, the contact sleeve 3-7-5 is a hollow cylindrical sleeve that is placed on the outer wall of the limit pin 3-6, and the bottom of the button of the micro switch 3-7-5 is provided with a contact head 3-7-6 whose outer diameter gradually decreases as it extends from away from the limit groove 3-2-1 to close to the limit groove 3-2-1.

[0043] The outer peripheral wall of the tail end of the measuring shaft 3-1 described in this embodiment is provided with different color marking areas at different length positions at the location where the scale 3-5 is provided, depending on whether the extended length of the measuring shaft 3-1 meets the detection requirements.

[0044] Two or more automatic adjustment devices 4 are respectively arranged on each of the longitudinal sides of the chassis vehicle 1 described in this embodiment for guiding the forward and backward movement of the bracket 2 relative to the position of each static contact 5 in the switch cabinet and enabling the crossbar 3-1 of each group of detection components 3 on the bracket 2 entering the switch cabinet to be coaxial with the standard installation axis position of the corresponding static contact 5. Each group of automatic adjustment devices 4 includes a U-shaped plate 4-1, a first guide shaft 4-2, a return spring 4-3, a second guide shaft 4-4 and a guide wheel 4-6.

[0045] The U-shaped plate 4-1 is fixedly connected to the chassis 1, and includes a first support plate 4-11 vertically arranged on both longitudinal sides close to the chassis 1 and extending in the transverse direction, a second support plate 4-12 vertically arranged on both longitudinal sides away from the chassis 1 and extending in the transverse direction, and a third support plate 4-13 extending in the longitudinal direction and connected between the first support plate 4-11 and the second support plate 4-12, the second support plate 4-12 is provided with a first guide hole 4-111 penetrating both longitudinal sides of the plate body, the first support plate 4-11 is provided with a second guide hole 4-112 penetrating both longitudinal sides of the plate body, the second guide hole 4-112 and the first guide hole 4-111 It is coaxially arranged in the longitudinal direction; one end of the second guide shaft 4-4 is fixedly connected to the first guide shaft 4-2, and the other end extends out of the second guide hole 4-112 and is rotatably connected to the guide wheel 4-6 through the vertical core shaft 4-7, and the other end of the first guide shaft 4-2 extends out of the first guide hole 4-111 and is provided with a limiting outer flange 4-5 whose outer diameter is larger than the inner diameter of the first guide hole 4-111 at the outer peripheral wall position near the end; the reset spring 4-3 is sleeved on the outer peripheral wall of the first guide shaft 4-2 and pressed between the second guide shaft 4-4 and the second support plate 4-12, so that the guide wheel 4-6 installed on the second guide shaft 4-4 can extend outward from the notch of the side slot hole 1-1 when no external force is applied.

[0046] The side wall of the switch cabinet described in this embodiment is provided with a guide groove extending in the transverse direction and matching the position and size of the guide wheels 4-6 of the automatic adjusting device 4.

[0047] The first guide hole 4-111 described in this embodiment is a circular hole, and the second guide hole 4-112 described is a regular polygonal hole.

[0048] The first guide shaft 4-2 described in this embodiment is a circular shaft inserted into the first guide hole 4-111, and the second guide shaft 4-4 is a regular polygonal shaft inserted into the second guide hole 4-112.

[0049] The static contact depth testing device for a trolley chamber described in the present invention is not limited to the above-mentioned embodiments. Any improvement or replacement based on the principle of the present invention should be within the protection scope of the present invention.

Claims

1. A measuring device for measuring the engagement depth of a stationary contact and a moving contact, characterized in that: It comprises a bracket (2), a chassis vehicle (1) arranged at the bottom of the bracket (2) and used to drive the bracket (2) to move horizontally forward and backward relative to the position of each static contact in the switch cabinet and enter and exit the switch cabinet body, and one or more detection components (3) arranged on the bracket (2) and corresponding to the position of each static contact (5) in the switch cabinet and used to measure the meshing depth of each moving contact and the static contact (5); Each detection assembly (3) includes a measuring shaft (3-1), a shaft sleeve (3-2), a return spring (3-3) and a contact block (3-4). The shaft sleeve (3-2) is fixedly mounted on the bracket (2) and its axial extension direction is parallel to the front-rear lateral movement direction of the bracket (2); the front end of the measuring shaft (3-1) is fixedly connected to the contact block (3-4); the measuring shaft (3-1) extends from the front end of the shaft sleeve (3-2) through the shaft hole of the shaft sleeve (3-2) to the rear end of the shaft sleeve (3-2); The rear end of the measuring shaft (3-1) can extend from the rear end of the sleeve (3-2); the return spring (3-3) is sleeved outside the measuring shaft (3-1) and connected between the contact block (3-4) and the sleeve (3-2); when the contact block (3-4) is not subjected to an external force caused by the movement of the rear end of the vector shaft (3-1), the return spring (3-3) is in a naturally extended state, and the rear end of the measuring shaft (3-1) is located in the rear end port of the sleeve (3-2); when the contact block (3-4) is subjected to an external force caused by the movement of the rear end of the vector shaft (3-1), the return spring (3-3) is compressed, and the rear end of the measuring shaft (3-1) is exposed from the rear end port of the sleeve (3-2); a scale (3-5) extending in a direction parallel to the axial direction and used to mark the sliding distance of the measuring shaft (3-1) is provided on the outer peripheral wall of the rear end of the measuring shaft (3-1); A limiting groove (3-2-1) is provided on the side wall of the shaft sleeve (3-2) and passes through the inner and outer surfaces of the side wall and extends in the axial direction; a limiting pin (3-6) is fixedly connected to the side wall of the measuring shaft (3-1) and is movably inserted into the limiting groove (3-2-1) and is used to limit the axial movement stroke of the measuring shaft (3-1) relative to the shaft sleeve (3-2); Each set of detection components (3) also includes a display light component (3-7), the display light component (3-7) including a display light (3-7-1) disposed at the rear end of the bracket and located outside the rear end port of the shaft hole of the shaft sleeve (3-2), a battery component (3-7-2) providing power to the display light (3-7-1), a micro switch mounting plate (3-7-4) disposed on the outer side wall of the shaft sleeve (3-2), and a micro switch (3-7-5) fixed on the micro switch mounting plate (3-7-4), wherein the micro switch (3-7-5), the display light (3-7-1) and the battery component (3-7-2) are connected by wires to form a control circuit for controlling the display light (3-7-1) to switch on and off; The contact jacket (3-7-6) is a hollow cylindrical jacket that is sleeved on the outer peripheral wall of the limit pin (3-6); the bottom of the button of the micro switch (3-7-5) is provided with a contact jacket (3-7-6) whose outer diameter gradually decreases as it extends from away from the limit slot (3-2-1) to close to the limit slot (3-2-1); A travel trigger switch (6) is provided at the bottom of the chassis vehicle (1). When the chassis vehicle (1) runs to a set detection position where the contact block (3-4) contacts the static contact (5), the travel trigger switch (6) can be triggered, causing the chassis vehicle (1) to stop running.

2. The measuring device for measuring the engagement depth of a stationary contact and a moving contact according to claim 1, characterized in that: The micro switch mounting plate (3-7-4) is arranged on the vertical upper side or lower side of the limit slot (3-2-1), the trigger button of the micro switch mounting plate (3-7-4) extends to the upper side or lower side edge position of the middle section of the limit slot (3-2-1), and the outer cover of the limit pin (3-6) is provided with a contact outer cover (3-7-6), and when the contact outer cover (3-7-6) and the limit pin (3-6) move to the middle section of the limit slot (3-2-1) together, they can contact with the micro switch (3-7-5 ) button, so that the micro switch (3-7-5) connects the control circuit of the display light (3-7-1), thereby lighting up the display light (3-7-1); when the contact sleeve (3-7-6) moves together with the limit pin (3-6) to a position outside the middle section of the limit slot (3-2-1) and separates from the button of the micro switch (3-7-5), the micro switch (3-7-5) disconnects the control circuit of the display light (3-7-1), thereby turning off the display light (3-7-1).

3. The measuring device for measuring the engagement depth of a stationary contact and a moving contact according to claim 1 or 2, characterized in that: The outer peripheral wall of the tail end of the measuring shaft (3-1) is provided with different color marking areas at different length positions at a location where a scale (3-5) is provided, depending on whether the extended length of the measuring shaft (3-1) meets the detection requirements.

4. The measuring device for measuring the engagement depth of a stationary contact and a moving contact according to claim 1 or 2, characterized in that: Two or more automatic adjustment devices (4) are provided on each of the longitudinal sides of the chassis vehicle (1) for guiding the forward and backward movement of the bracket (2) relative to the positions of the respective static contacts (5) in the switch cabinet and enabling the measuring axes (3-1) of the respective detection components (3) on the bracket (2) entering the switch cabinet to be coaxial with the standard installation axis position of the corresponding static contacts (5), each set of automatic adjustment devices (4) comprising a U-shaped plate (4-1), a first guide shaft (4-2), a return spring (4-3), a second guide shaft (4-4) and a guide wheel (4-6). The U-shaped plate (4-1) is fixedly connected to the chassis (1) and comprises a first support plate (4-11) vertically arranged on both longitudinal sides close to the chassis (1) and extending in the transverse direction, a second support plate (4-12) vertically arranged on both longitudinal sides away from the chassis (1) and extending in the transverse direction, and a third support plate (4-13) extending in the longitudinal direction and connected between the first support plate (4-11) and the second support plate (4-12), wherein the second support plate (4-12) is provided with a first guide hole (4-111) penetrating both longitudinal sides of the plate body, the first support plate (4-11) is provided with a second guide hole (4-112) penetrating both longitudinal sides of the plate body, and the second guide hole (4-112) and the first guide hole (4-111) are arranged in the longitudinal direction. Coaxially arranged; one end of the second guide shaft (4-4) is fixedly connected to the first guide shaft (4-2), and the other end extends out of the second guide hole (4-112) and is rotatably connected to the guide wheel (4-6) through a vertically arranged core shaft (4-7); the other end of the first guide shaft (4-2) extends out of the first guide hole (4-111) and is provided with a limiting outer flange (4-5) whose outer diameter is larger than the inner diameter of the first guide hole (4-111) at a position of the outer peripheral wall near the end; the return spring (4-3) is sleeved on the outer peripheral wall of the first guide shaft (4-2) and pressed between the second guide shaft (4-4) and the second support plate (4-12), so that the guide wheel (4-6) installed on the second guide shaft (4-4) can extend outward from the notch of the side slot hole (1-1) when no external force is applied.

5. The measuring device for measuring the engagement depth of a stationary contact and a moving contact according to claim 4, characterized in that: A guide groove extending in the transverse direction and matching the position and size of the guide wheel (4-6) of the automatic adjustment device (4) is provided on the cabinet side wall of the switch cabinet.

6. The measuring device for measuring the engagement depth of a stationary contact and a moving contact according to claim 4, characterized in that: The first guide hole (4-111) is a circular hole, and the second guide hole (4-112) is a regular polygonal hole.

7. The measuring device for measuring the engagement depth of a stationary contact and a moving contact according to claim 6, characterized in that: The first guide shaft (4-2) is a circular shaft inserted into the first guide hole (4-111), and the second guide shaft (4-4) is a regular polygonal shaft inserted into the second guide hole (4-112).

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