Knob handle and motor protection device

Abstract

The utility model provides a knob handle and a motor protection device, and relates to the technical field of electrical equipment. And the knob handle is connected with the horse holder body through the connecting rod. A positioning core and a push plate of the knob handle are installed on the shell, the positioning core is provided with a connecting hole and a sliding groove which are communicated with each other, the push plate is provided with a via hole, and a limiting groove is further formed in the side, facing the positioning core, of the push plate and communicated with the via hole. When the connecting rod is not connected to the positioning core, one part of the sliding block is located in the limiting groove, and the other part of the sliding block is located in the sliding groove so as to limit rotation of the positioning core relative to the shell. In the process that the connecting rod is connected to the positioning core, the sliding block can be pushed by the connecting rod to move in the direction from the limiting groove to the sliding groove, so that part of the sliding block located in the limiting groove moves into the sliding groove, and limitation on the positioning core is relieved. According to the invention, the motor protection device can be accurately and efficiently installed in the power distribution cabinet, and the possibility of damage to the knob handle or the horse protection body is reduced.

Description

Technical Field

[0001] The present application relates to the technical field of electrical equipment, and particularly relates to a knob handle and a motor protection device. Background Art

[0002] The motor protection device is also called a motor protector or a motor protection circuit breaker. The motor protection device is a special protection device installed on the motor control board. It can timely cut off the power supply when the motor has faults such as overcurrent, undercurrent, open phase, locked rotor, overheat, and motor overload, to prevent the motor from being damaged.

[0003] The motor protection device generally includes a knob handle, a connecting rod, and a motor protection body. The knob handle is connected to the motor protection body through the connecting rod. The motor protection body is also connected to the motor. By rotating the knob handle, the motor protection body can be controlled to switch on or off, so as to control the power-on or power-off of the motor.

[0004] The motor protection device is usually installed in a power distribution cabinet for use. In the prior art, when the motor protection device is installed in the power distribution cabinet, there is a problem that it cannot be accurately assembled, the assembly efficiency is low, and it is easy to cause damage to the knob handle or the motor protection body. Summary of the Utility Model

[0005] The present application provides a knob handle and a motor protection device, which can facilitate the accurate and efficient installation of the motor protection device in the power distribution cabinet and reduce the possibility of damage to the knob handle or the motor protection body.

[0006] In a first aspect, the present application provides a knob handle, which is connected to a motor protection body through a connecting rod. The knob handle includes a housing, a positioning core, a push plate, and a slider. The positioning core is installed in the housing. The positioning core is provided with a connecting hole and a sliding groove that communicate with each other. The connecting hole is used for the connecting rod to extend into so that the connecting rod is connected to the positioning core. The push plate is installed in the housing. The push plate is provided with a through hole that communicates with the connecting hole and is opposite in position. The through hole is used for the connecting rod to pass through. A limiting groove is further provided on one side of the push plate facing the positioning core. The limiting groove communicates with the through hole.

[0007] In a first period, a part of the slider is located in the limiting groove, and another part of the slider is located in the sliding groove to limit the relative rotation of the positioning core with respect to the housing. In a second period, the slider can move along the direction from the limiting groove to the sliding groove under the pushing of the connecting rod, so that a part of the slider located in the limiting groove moves to be located in the sliding groove, and the restriction on the positioning core is released. Wherein, the first period is the period corresponding to when the connecting rod is not connected to the positioning core, and the second period is the period corresponding to the process of connecting the connecting rod to the positioning core.

[0008] With the above solution, when a part of the slider is located in the limit groove, the limit groove will limit the slider, preventing the slider from rotating relative to the housing. Based on this, when another part of the slider is located in the sliding groove, the slider will limit the sliding groove, preventing the positioning core provided with the sliding groove from rotating relative to the housing. In this way, during the first period, even if the knob exposed outside the cabinet door is accidentally touched, the knob connected to the positioning core will not be able to rotate relative to the housing when the positioning core cannot rotate relative to the housing, enabling the knob handle to maintain its initial state and not affecting the installation of the connecting rod into the power distribution cabinet. Thus, it is convenient for the motor protection device to be accurately and efficiently installed in the power distribution cabinet, improving the efficiency of installing the motor protection device into the power distribution cabinet.

[0009] When the motor protection device can be accurately installed in the power distribution cabinet, the operator does not need to repeatedly adjust the position of the connecting rod or repeatedly rotate the knob for debugging. Therefore, the possibility of damage to the knob handle or the MPD body can be reduced.

[0010] In addition, during the second period when the connecting rod is connected to the positioning core, the slider is pushed by the connecting rod and can move along the direction from the limit groove to the sliding groove until the entire slider is located in the sliding groove, releasing the restriction on the positioning core and enabling the positioning core to rotate freely relative to the housing to achieve normal operation of the knob handle.

[0011] In a possible design, the slider includes a first limiting portion, a second limiting portion, and a pushing portion that are connected to each other. During the first period, the first limiting portion is located in the limit groove, and the second limiting portion is located in the sliding groove. Moreover, during the first period, at least a part of the pushing portion is located in the through hole and / or the connecting hole. During the second period, the pushing portion can be in contact with the connecting rod, and under the push of the connecting rod, the pushing portion drives the slider to move along the direction from the limit groove to the sliding groove, so that the first limiting portion moves from the limit groove into the sliding groove, releasing the restriction on the positioning core.

[0012] With the above solution, the slider is set to include three parts: a first limiting portion, a second limiting portion, and a pushing portion that are connected to each other. During the first period, the first limiting portion is located in the limit groove, and the second limiting portion is located in the sliding groove, preventing the slider from rotating relative to the housing, and thus preventing the positioning core provided with the sliding groove from rotating relative to the housing. In this way, the knob connected to the positioning core will not be able to rotate relative to the housing either, enabling the knob handle to maintain its initial state and not affecting the installation of the connecting rod into the power distribution cabinet. Thus, it is convenient for the motor protection device to be accurately and efficiently installed in the power distribution cabinet, improving the efficiency of installing the motor protection device into the power distribution cabinet.

[0013] In addition, during the first period, the pushing portion is at least partially located within the via hole and / or the connection hole, such that during the second period when the connecting rod is being connected to the positioning core, the connecting rod can abut against the pushing portion, and by pushing the pushing portion, the slider is driven to move along the limiting groove towards the sliding groove. Thus, when the first limiting portion moves from the limiting groove into the sliding groove, the restriction on the positioning core is released, so that the positioning core can rotate freely relative to the housing.

[0014] In a possible design, the first limiting portion is a solid structure, the second limiting portion is provided with a hollowed-out portion, and the pushing portion is connected to the first limiting portion.

[0015] Connecting the pushing portion to the solid first limiting portion instead of the second limiting portion with the hollowed-out portion facilitates ensuring that the pushing portion and the first limiting portion have sufficient contact surfaces to guarantee the connection reliability of the pushing portion.

[0016] In a possible design, the limiting groove includes a first groove and a second groove. The second groove is located between the first groove and the via hole, and the first groove, the second groove, and the via hole are in communication. The first groove includes a first limiting wall adjacent to the second groove, and the second groove is provided on a part of the first limiting wall. During the first period, the first limiting portion is located within the first groove, a part of the pushing portion is located within the second groove, and another part of the pushing portion is located within the via hole. The first limiting wall can restrict the first limiting portion from moving from the first groove to the second groove.

[0017] Through the above solution, when installing the slider on the push plate, the first limiting portion can be located within the first groove, a part of the pushing portion can be located within the second groove, and another part of the pushing portion can be located within the via hole, facilitating the quick and accurate installation of the slider at the preset position on the push plate. In addition, the second groove is provided on the first limiting wall of the first groove adjacent to the second groove, and the second groove is only provided on a part of the first limiting wall. In this way, part of the limiting wall can be used to limit the first limiting portion, facilitating reducing the possibility of the first limiting portion moving from the first groove to the second groove, thereby improving the position stability of the slider installed on the push plate.

[0018] In a possible design, the sliding groove includes a third groove and a fourth groove. The fourth groove is located between the third groove and the connection hole, and the third groove, the fourth groove, and the connection hole are in communication. The third groove includes a second limiting wall adjacent to the fourth groove, and the fourth groove is provided on a part of the second limiting wall. During the second period, the first limiting portion is located within the third groove, the pushing portion is located within the fourth groove, and the second limiting wall can restrict the first limiting portion from moving from the third groove to the fourth groove.

[0019] Through the above solution, during the process of the connecting rod pushing against the slider in the second period, and when the connecting rod is connected to the positioning core, the first limiting portion can be located in the third groove, and the pushing portion can be located in the fourth groove. The fourth groove is provided on the second limiting wall of the third groove close to the fourth groove, and the fourth groove is only provided on a part of the second limiting wall. In this way, part of the limiting walls in the second limiting wall can be used to limit the first limiting portion, facilitating reducing the possibility of the first limiting portion moving from the third groove to the fourth groove, thereby improving the position stability of the slider relative to the positioning core when the slider abuts against the connecting rod.

[0020] In a possible design, the first limiting portion is provided with a hollowed-out portion, the second limiting portion is a solid structure, and the pushing portion is connected to the second limiting portion.

[0021] Through the above solution, connecting the pushing portion to the solid second limiting portion instead of the first limiting portion provided with the hollowed-out portion facilitates ensuring that there is sufficient contact surface between the pushing portion and the second limiting portion to ensure the connection reliability of the pushing portion.

[0022] In a possible design, the knob handle further includes an elastic member, one end of the elastic member abuts against the pushing portion, and the other end of the elastic member abuts against the bottom of the chute.

[0023] Through the above solution, in the first period, the setting of the elastic member can press the slider tightly against the bottom of the limiting groove, reducing the possibility that the initial position of the slider changes due to the shaking of the knob handle.

[0024] In the second period, during the process of the connecting rod moving along the direction from the limiting groove to the chute, the connecting rod pushes against the slider, causing the slider to move along the direction from the limiting groove to the chute. During this process, the elastic member is compressed and stores energy. The setting of the elastic member can generate a certain resistance to the movement of the slider along the direction from the limiting groove to the chute, reducing the possibility that the slider collides with the bottom of the chute due to too fast moving speed of the slider, thereby reducing the possibility of damage to the slider. In addition, when the connecting rod disengages from the positioning core, the pushing force of the connecting rod on the slider is cancelled, and the elastic member can release the elastic potential energy to reset the slider.

[0025] In a possible design, the elastic member is a spring, the pushing portion is provided with a convex post along the direction from the limiting groove to the chute, and the spring is sleeved on the convex post.

[0026] Through the above solution, the spring is sleeved on the convex post, enabling the convex post to limit the spring. In this way, the possibility of the spring tilting can be reduced during the process of the slider moving along the direction from the limiting groove to the chute and during the process of the slider moving along the direction from the chute to the limiting groove. In the case where the spring does not tilt, the spring can well play the role of restricting the initial position of the slider and resetting the slider.

[0027] In a possible design, the first limiting portion, the second limiting portion, the pushing portion, and the convex post are integrally formed.

[0028] Through the above solution, on the one hand, the assembly processes of various parts in the slider can be saved, and the assembly efficiency of the knob handle can be improved. On the other hand, the connection strength between the integrally formed parts of the slider is relatively high, which is convenient for ensuring the overall structural strength of the slider.

[0029] In a second aspect, the present application provides a motor protection device, which includes a motor protection body, a connecting rod, and the knob handle in the first aspect. The motor protection body and the knob handle are connected through the connecting rod.

[0030] For the motor protection device provided in the above second aspect and each possible design of the second aspect, the beneficial effects can refer to the beneficial effects brought by the above first aspect and each possible implementation manner of the first aspect, and will not be elaborated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 is a schematic structural diagram of an assembly structure of a connecting rod and a knob handle provided by an embodiment of the present application from a perspective.

[0032] Figure 2 is Figure 1 an exploded view of the shown partial structure.

[0033] Figure 3 is a schematic structural diagram of a positioning core provided by an embodiment of the present application from a perspective.

[0034] Figure 4 is a schematic structural diagram of a positioning core provided by an embodiment of the present application from another perspective.

[0035] Figure 5 is a schematic structural diagram of a push plate provided by an embodiment of the present application.

[0036] Figure 6 is a schematic structural diagram of a knob handle provided by an embodiment of the present application.

[0037] Figure 7 is Figure 6 a cross-sectional view taken along the A-A section.

[0038] Figure 8 is Figure 7 an enlarged view of part B in.

[0039] Figure 9 is a schematic structural diagram of an assembly structure of a connecting rod and a knob handle provided by an embodiment of the present application from another perspective.

[0040] Figure 10 is Figure 9 A cross-sectional view along the C-C section.

[0041] Figure 11 is Figure 10 An enlarged view of part D in

[0042] Figure 12 A schematic structural diagram of a slider provided by an embodiment of the present application.

[0043] Explanation of reference numerals:

[0044] 100, connecting rod;

[0045] 200, knob handle;

[0046] 210, positioning core; 211, connecting hole; 212, sliding groove; 2121, third groove; B2, second limiting wall; 2122, fourth groove;

[0047] 220, housing;

[0048] 230, push plate; 231, through hole; 232, limiting groove; 2321, first groove; B1, first limiting wall; 2322, second groove;

[0049] 240, slider; 241, first limiting portion; 242, second limiting portion; 243, pushing portion; 244, convex column;

[0050] 250, knob;

[0051] 260, elastic member. Detailed implementation manners

[0052] To make the objectives, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Apparently, the described embodiments are only a part rather than all of the embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without creative efforts shall fall within the protection scope of the present application.

[0053] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which this application belongs; the terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the drawings are intended to cover non-exclusive inclusion.

[0054] References to "embodiments" in this specification mean that the particular features, structures, or characteristics described in connection with the embodiments can be included in at least one embodiment of the present application. The phrase "embodiments" appearing in various places in the specification does not necessarily refer to the same embodiment, nor are they independent or alternative embodiments mutually exclusive of other embodiments. Those skilled in the art will explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments.

[0055] As used herein, the term "and / or" is merely a description of the relationship between associated objects, indicating that three relationships can exist. For example, A and / or B can mean: A exists, both A and B exist, or B exists. Additionally, the character " / " in this specification generally indicates an "or" relationship between the associated objects before and after.

[0056] The directional terms used in the following description are the directions shown in the figures and do not limit the specific structure of the current-limiting module of the present application. For example, in the description of the present application, terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. This is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present application.

[0057] Furthermore, terms such as "first", "second", etc. in the specification and claims of the present application or in the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order, and may explicitly or implicitly include one or more of such features.

[0058] In the description of the present application, unless otherwise specified, "a plurality of" means two or more (including two). Similarly, "a plurality of groups" means two or more groups (including two groups).

[0059] In the description of the present application, it should be noted that, unless otherwise clearly specified and limited, the terms "mounted", "connected", and "coupled" should be understood in a broad sense. For example, the "connection" or "coupling" of mechanical structures can refer to a physical connection. For example, a physical connection can be a fixed connection, such as a fixed connection through a spacer, such as a fixed connection through screws, bolts, or other spacers; a physical connection can also be a detachable connection, such as a snap connection or a snap-fit connection; a physical connection can also be an integral connection, such as a connection formed by welding, bonding, or integral molding. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0060] To enable those skilled in the art to better understand the solution of this application, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings.

[0061] Figure 1 FIG. 5 is a schematic structural diagram of an assembly structure of a connecting rod and a knob handle from a perspective. This application provides a motor protection device, which includes a motor protection body, and a connecting rod 100 and a knob handle 200 as shown in Figure 1 FIG. 6. The motor protection body and the knob handle 200 are connected by the connecting rod 100.

[0062] The motor protection body can be a circuit breaker. The connecting rod 100 can be in the shape of a quadrangular prism or other possible shapes.

[0063] Figure 2 is Figure 1 an exploded view of a partial structure shown in FIGS. 16 and 17. Combining FIGS. 16 and 17, the knob handle 200 includes a positioning core 210. Figure 1 and Figure 2 FIG. 17, the knob handle 200 includes a positioning core 210.

[0064] One end of the connecting rod 100 is connected to the positioning core 210, and the other end of the connecting rod 100 is connected to the motor protection body, so as to realize the connection between the motor protection body and the knob handle 200 through the connecting rod 100. Among them, the specific structure of the knob handle 200 will be introduced in detail later and will not be elaborated here.

[0065] The motor protection device is generally installed and used in a power distribution cabinet. The knob handle 200 is usually installed on the cabinet door of the power distribution cabinet and partially exposed outside the cabinet door, and the motor protection body is located inside the power distribution cabinet. After connecting the knob handle 200 and the motor protection body through the connecting rod 100, an operator can rotate the knob handle 200 outside the power distribution cabinet to control the motor protection body to switch on or off.

[0066] The motor protection body is also connected to the motor, so the motor protection device can be connected to the circuit where the motor is located. In this way, when the motor protection body is switched on, the circuit where the motor is located can be controlled to conduct, and at this time the motor can be powered on to work normally. On the contrary, when the motor protection body is switched off, the circuit where the motor is located can be controlled to disconnect, and at this time the motor is powered off and stops working. In this way, the control and protection of the circuit where the motor is located by the motor protection device can be realized.

[0067] The following will introduce in detail the specific structure of the knob handle 200 provided by this application with reference to the accompanying drawings.

[0068] As shown in Figure 1 and Figure 2 FIGS. 18 and 19, the knob handle 200 provided by this application includes a housing 220, a positioning core 210, a push plate 230, and a slider 240.Figure 3 This is a schematic structural view of a positioning core provided by an embodiment of the present application from one perspective. Figure 4 This is a schematic structural view of a positioning core provided by an embodiment of the present application from another perspective. In combination with Figures 2 to 4 , the positioning core 210 is installed in the housing 220. The positioning core 210 is provided with a connecting hole 211 and a sliding groove 212 that communicate with each other. The connecting hole 211 is used for the connecting rod 100 to extend into, so that the connecting rod 100 is connected to the positioning core 210. Figure 5 This is a schematic structural view of a push plate provided by an embodiment of the present application. In combination with Figures 2 to 5 , the push plate 230 is installed in the housing 220. The push plate 230 is provided with a through hole 231. The through hole 231 communicates with the connecting hole 211 and is opposite in position. The through hole 231 is used for the connecting rod 100 to pass through. A limiting groove 232 is further provided on one side of the push plate 230 facing the positioning core 210. The limiting groove 232 communicates with the through hole 231.

[0069] The housing 220 is the basic structure of the knob handle 200. The housing 220 is provided with installation positions for installing structures such as the knob 250, the positioning core 210, and the push plate 230, so that structures such as the knob 250, the positioning core 210, and the push plate 230 can be installed in the housing 220.

[0070] As Figure 3 and Figure 4 shown, the positioning core 210 is provided with a connecting hole 211 for the connecting rod 100 to extend into. The shape of the connecting hole 211 is adapted to the shape of the connecting rod 100. Exemplarily, when the connecting rod 100 is a quadrangular prism, the connecting hole 211 can be a square hole. After the connecting rod 100 extends into the connecting hole 211 and is installed in place, the connection between the connecting rod 100 and the positioning core 210 can be achieved.

[0071] The positioning core 210 is also connected to the knob 250. After the connecting rod 100 is connected to the positioning core 210, rotating the knob 250 can drive the positioning core 210 to rotate relative to the housing 220. Subsequently, the connecting rod 100 connected to the positioning core 210 can rotate relative to the housing 220 to drive the main body of the horse protection to close or open.

[0072] As Figure 2As shown, the push plate 230 is located on the side of the positioning core 210 away from the knob 250. The push plate 230 is provided with a through hole 231 for the connecting rod 100 to pass through. Since the connecting rod 100 needs to be connected to the positioning core 210 during operation so that the connecting rod 100 can rotate with the rotation of the positioning core 210, and the connecting rod 100 does not need to be connected to the push plate 230 during operation, different from the shape requirement of the connecting hole 211, the shape of the through hole 231 does not require to be adapted to the shape of the connecting rod 100, as long as it is ensured that the end of the connecting rod 100 can pass through the through hole 231.

[0073] Combined with Figures 2 to 4 , the positioning core 210 is further provided with a sliding groove 212 communicating with the connecting hole 211, and the push plate 230 is further provided with a limiting groove 232 communicating with the through hole 231. The through hole 231 communicates with the connecting hole 211 and is opposite in position, and the limiting groove 232 communicates with the sliding groove 212 and is opposite in position.

[0074] Among them, the through hole 231 and the connecting hole 211 can both be through holes. The limiting groove 232 and the sliding groove 212 can both be blind grooves, and the limiting groove 232 can be a blind groove with the notch facing the positioning core 210, and the sliding groove 212 can be a blind groove with the notch facing the push plate 230. That is to say, the notch of the limiting groove 232 is located on the side of the push plate 230 facing the positioning core 210, and the notch of the sliding groove 212 is located on the side of the positioning core 210 facing the push plate 230.

[0075] The settings of the sliding groove 212 and the limiting groove 232 are both used to provide a receiving space or a moving space for the slider 240. Among them, the shape of the slider 240 can be set arbitrarily, as long as it can be adapted to the sliding groove 212 and the limiting groove 232 and can move relative to the sliding groove 212 and the limiting groove 232. The working principle of the knob handle 200 at different time periods will be introduced in detail below in combination with Figures 3 to 10

[0076] Figure 6 is a schematic structural diagram of a knob handle provided by an embodiment of the present application, Figure 7 is Figure 6 a cross-sectional view along the A-A section, Figure 8 is Figure 7 an enlarged view of part B in Figures 3 to 8 . Exemplarily, in combination with

[0077] , in the first time period, a part of the slider 240 is located in the limiting groove 232, and another part of the slider 240 is located in the sliding groove 212 to limit the rotation of the positioning core 210 relative to the housing 220.

[0078] Combined with Figures 3 to 8, the slider 240 can be regarded as including two parts, one part of which is located in the limit groove 232 and the other part is located in the sliding groove 212. Since the limit groove 232 is provided on the push plate 230 and the push plate 230 is installed on the housing 220 and will not rotate relative to the housing 220, when a part of the slider 240 is located in the limit groove 232, the position of the slider 240 relative to the housing 220 is fixed and will not rotate relative to the housing 220. Based on this, when another part of the slider 240 is located in the sliding groove 212, the slider 240 with a fixed position will limit the sliding groove 212, so that the position of the positioning core 210 of the sliding groove 212 relative to the housing 220 will be fixed and will not rotate relative to the housing 220. Therefore, when a part of the slider 240 is located in the limit groove 232 and another part of the slider 240 is located in the sliding groove 212, the rotation of the positioning core 210 relative to the housing 220 can be restricted.

[0079] Figure 9 FIG. 4 is a schematic structural view of an assembly structure of a connecting rod and a knob handle provided by an embodiment of the present application from another perspective. Figure 10 is Figure 9 a cross-sectional view taken along the C-C section, Figure 11 is Figure 10 an enlarged view of part D in FIG. 4. Exemplarily, as Figures 3 to 5 , and as Figures 9 to 11 shown, in the second time period, the slider 240 can move along the direction from the limit groove 232 to the sliding groove 212 under the pushing of the connecting rod 100, so that a part of the slider 240 located in the limit groove 232 moves to be located in the sliding groove 212, and the restriction on the positioning core 210 is released.

[0080] Wherein, the second time period is the time period corresponding to the process of connecting the connecting rod 100 to the positioning core 210.

[0081] Combined with Figures 3 to 5 , and Figures 9 to 11 , during the installation process of the connecting rod 100 to the positioning core 210, the end of the connecting rod 100 passes through the aforementioned through hole 231 along the direction from the limit groove 232 to the sliding groove 212 and extends into the connection hole 211, so that the connecting rod 100 is connected to the positioning core 210. During the process of the connecting rod 100 moving along the direction from the limit groove 232 to the sliding groove 212, the connecting rod 100 can abut against the slider 240 and push the slider 240. The slider 240 moves along the direction from the limit groove 232 to the sliding groove 212 under the pushing of the connecting rod 100 until the slider 240 is entirely located in the sliding groove 212, and the restriction of the slider 240 on the positioning core 210 can be released. After the restriction of the positioning core 210 is released, the positioning core 210 and the slider 240 can rotate freely relative to the housing 220.

[0082] In the embodiment of the present application, a slider 240 is provided in the knob handle 200. The push plate 230 provided with the limit groove 232 does not rotate relative to the housing 220. When a part of the slider 240 is located in the limit groove 232, the limit groove 232 limits the slider 240, so that the slider 240 cannot rotate relative to the housing 220. Based on this, when another part of the slider 240 is located in the sliding groove 212, the slider 240 limits the sliding groove 212, so that the positioning core 210 provided with the sliding groove 212 cannot rotate relative to the housing 220. In this way, in the first period, even if the knob 250 exposed outside the cabinet door is accidentally touched, when the positioning core 210 cannot rotate relative to the housing 220, the knob 250 connected to the positioning core 210 will also not be able to rotate relative to the housing 220, so that the knob handle 200 can be maintained in the initial state and will not affect the installation of the connecting rod 100 into the power distribution cabinet. In this way, it is convenient for the motor protection device to be accurately and efficiently installed in the power distribution cabinet, and the installation efficiency of the motor protection device into the power distribution cabinet is improved.

[0083] When the motor protection device can be accurately installed in the power distribution cabinet, the operator does not need to adjust the position of the connecting rod 100 multiple times or rotate the knob 250 multiple times for debugging. Therefore, the possibility of damage to the knob handle 200 or the motor protection body can be reduced.

[0084] In addition, during the connection of the connecting rod 100 to the positioning core 210 in the second period, the slider 240 is pushed by the connecting rod 100 and can move along the direction from the limit groove 232 to the sliding groove 212 until the slider 240 is completely located in the sliding groove 212 to release the restriction of the slider 240 on the positioning core 210, so that the positioning core 210 can rotate freely relative to the housing 220 to realize the normal operation of the knob handle 200.

[0085] It can be seen that the positioning core 210 in the knob handle 200 provided by the present application can not only be maintained in the initial state and unable to rotate relative to the housing 220 in the first period to facilitate the accurate installation of the motor protection device into the power distribution cabinet, but also be released from the restriction of the housing 220 in the second period to facilitate the normal operation of the knob handle 200.

[0086] Figure 12 It is a schematic structural diagram of a slider provided by an embodiment of the present application. In some embodiments, as Figure 12 shown, the slider 240 may include a first limiting portion 241, a second limiting portion 242 and a pushing portion 243 that are connected to each other.

[0087] Combined with Figures 3 to 8 and Figure 12, during the first period, the first limiting portion 241 is located within the limiting groove 232, and the second limiting portion 242 is located within the sliding groove 212. Moreover, during the first period, the pushing portion 243 is at least partially located within the through hole 231 and / or the connecting hole 211. Combining Figures 3 to 5 , and Figures 9 to 12 , during the second period, the pushing portion 243 can be in contact with the connecting rod 100, and under the pushing of the connecting rod 100, the pushing portion 243 drives the slider 240 to move along the direction from the limiting groove 232 to the sliding groove 212, so that the first limiting portion 241 moves from within the limiting groove 232 to within the sliding groove 212, releasing the restriction on the positioning core 210.

[0088] The first limiting portion 241, the second limiting portion 242, and the pushing portion 243 can be in a plate-like structure, or can be in a block-like structure, a columnar structure, etc.

[0089] Both the second limiting portion 242 and the pushing portion 243 are connected to the first limiting portion 241. In some examples, when the first limiting portion 241 is a solid structure and the second limiting portion 242 is provided with a hollowed-out portion, the pushing portion 243 can be connected to the side of the first limiting portion 241 facing the through hole 231. Connecting the pushing portion 243 to the solid first limiting portion 241 instead of the second limiting portion 242 with a hollowed-out portion facilitates ensuring that the pushing portion 243 has sufficient contact surface with the first limiting portion 241 to ensure the connection reliability of the pushing portion 243.

[0090] In some other examples, when the first limiting portion 241 is provided with a hollowed-out portion and the second limiting portion 242 is a solid structure, the pushing portion 243 can be connected to the side of the second limiting portion 242 facing the connecting hole 211. Connecting the pushing portion 243 to the solid second limiting portion 242 instead of the first limiting portion 241 with a hollowed-out portion facilitates ensuring that the pushing portion 243 has sufficient contact surface with the second limiting portion 242 to ensure the connection reliability of the pushing portion 243.

[0091] In still some other examples, the pushing portion 243 can also be connected to both the first limiting portion 241 and the second limiting portion 242 simultaneously.

[0092] When the pushing portion 243 is connected to the side of the first limiting portion 241 facing the through hole 231, for the first period, in some possible cases, a part of the pushing portion 243 close to the first limiting portion 241 can be located within the limiting groove 232 together with the first limiting portion 241, and a part of the pushing portion 243 away from the first limiting portion 241 can protrude from the limiting groove 232 and be located within the through hole 231. In some other possible cases, the pushing portion 243 can be entirely located within the through hole 231.

[0093] When the pushing part 243 is connected to the side of the second limiting part 242 facing the connecting hole 211, for the first period, in some possible cases, a part of the pushing part 243 close to the second limiting part 242 can be located in the sliding groove 212 together with the second limiting part 242, and a part of the pushing part 243 far from the second limiting part 242 can protrude from the sliding groove 212 and be located in the connecting hole 211. In some other possible cases, the pushing part 243 can be entirely located in the connecting hole 211.

[0094] When the pushing part 243 is connected to the first limiting part 241 and the second limiting part 242, for the first period, in some possible cases, a part of the pushing part 243 close to the first limiting part 241 can be located in the limiting groove 232 together with the first limiting part 241, a part of the pushing part 243 close to the second limiting part 242 can be located in the sliding groove 212 together with the second limiting part 242, and the part of the pushing part 243 far from the first limiting part 241 and far from the second limiting part 242 can be located in the through hole 231 and the connecting hole 211. In some other possible cases, the pushing part 243 may not be located in the limiting groove 232 and the sliding groove 212, but entirely located in the through hole 231 and the connecting hole 211.

[0095] It can be seen that whether the pushing part 243 is connected to the first limiting part 241 or the second limiting part 242, in the first period, the pushing part 243 must be at least partially located in the through hole 231 and / or the connecting hole 211. In this way, during the connection of the connecting rod 100 to the positioning core 210 in the second period, it is possible for the connecting rod 100 to abut against the pushing part 243, and drive the slider 240 to move along the direction from the limiting groove 232 to the sliding groove 212 by pushing the pushing part 243.

[0096] When the slider 240 is pushed by the connecting rod 100 and moves along the direction from the limiting groove 232 to the sliding groove 212 until the slider 240 is entirely located in the sliding groove 212, the restriction on the positioning core 210 can be released.

[0097] In this embodiment, the slider 240 is set to include three parts, namely the first limiting part 241, the second limiting part 242 and the pushing part 243 which are connected to each other. In the first period, the first limiting part 241 is located in the limiting groove 232, and the second limiting part 242 is located in the sliding groove 212, so that the slider 240 cannot rotate relative to the housing 220, and thus the positioning core 210 provided with the sliding groove 212 cannot rotate relative to the housing 220. In this way, the knob 250 connected to the positioning core 210 will also not be able to rotate relative to the housing 220, enabling the knob handle 200 to maintain its initial state, not affecting the installation of the connecting rod 100 into the power distribution cabinet, and thus facilitating the accurate and efficient installation of the motor protection device into the power distribution cabinet, improving the installation efficiency of the motor protection device into the power distribution cabinet.

[0098] In addition, in the first period, the pushing portion 243 is at least partially located in the via hole 231 and / or the connecting hole 211, so that during the connection of the connecting rod 100 to the positioning core 210 in the second period, the connecting rod 100 can abut against the pushing portion 243, and by pushing the pushing portion 243, the slider 240 is driven to move along the direction from the limiting groove 232 to the sliding groove 212. Thus, when the first limiting portion 241 moves from the limiting groove 232 into the sliding groove 212, the restriction on the positioning core 210 is released, so that the positioning core 210 can rotate freely relative to the housing 220.

[0099] Based on the foregoing description, in the case where the pushing portion 243 is connected to the first limiting portion 241, in some embodiments, as Figure 5 shown, the limiting groove 232 may include a first groove 2321 and a second groove 2322. The second groove 2322 is located between the first groove 2321 and the via hole 231, and the first groove 2321, the second groove 2322, and the via hole 231 are in communication. The first groove 2321 includes a first limiting wall B1 close to the second groove 2322, and the second groove 2322 is provided on a part of the first limiting wall B1.

[0100] Among them, the first groove 2321, the second groove 2322, and the via hole 231 are in communication. To be precise, the first groove 2321 and the via hole 231 are in communication through the second groove 2322.

[0101] The first limiting wall B1 is a groove wall among the multiple groove walls of the first groove 2321 that is close to the second groove 2322. The second groove 2322 is provided on a part of the first limiting wall B1, rather than on the entire first limiting wall B1, so that there is a part of the limiting wall in the first limiting wall B1 that can be used to limit the first limiting portion 241.

[0102] Exemplarily, in combination with Figure 2 、 Figure 5 , and Figure 12 , in the first period, the first limiting portion 241 is located in the first groove 2321, a part of the pushing portion 243 is located in the second groove 2322, and another part of the pushing portion 243 is located in the via hole 231. The first limiting wall B1 can limit the first limiting portion 241 from moving from the first groove 2321 to the second groove 2322.

[0103] In summary, the limiting groove 232 includes a first groove 2321 and a second groove 2322, and the first groove 2321, the second groove 2322 and the through hole 231 are communicated with each other. In this way, when the slider 240 is installed on the push plate 230, the first limiting portion 241 can be located in the first groove 2321, a part of the pushing portion 243 can be located in the second groove 2322, and the other part of the pushing portion 243 can be located in the through hole 231, which is convenient for the slider 240 to be quickly and accurately installed at the preset position of the push plate 230. In addition, the second groove 2322 is provided on the first limiting wall B1 of the first groove 2321 close to the second groove 2322, and the second groove 2322 is only provided on a part of the first limiting wall B1. In this way, a part of the limiting wall in the first limiting wall B1 can be used to limit the first limiting portion 241, which is convenient for reducing the possibility of the first limiting portion 241 moving from the first groove 2321 to the second groove 2322, thereby improving the position stability of the slider 240 installed on the push plate 230.

[0104] Further, in some embodiments, as Figure 3 and Figure 4 shown, the sliding groove 212 may include a third groove 2121 and a fourth groove 2122. The fourth groove 2122 is located between the third groove 2121 and the connecting hole 211, and the third groove 2121, the fourth groove 2122 and the connecting hole 211 are communicated with each other. The third groove 2121 includes a second limiting wall B2 close to the fourth groove 2122, and the fourth groove 2122 is provided on a part of the second limiting wall B2.

[0105] Among them, the third groove 2121, the fourth groove 2122 and the connecting hole 211 are communicated with each other. To be exact, the third groove 2121 and the connecting hole 211 are communicated through the fourth groove 2122.

[0106] The second limiting wall B2 is a groove wall in the multiple groove walls of the third groove 2121 that is close to the fourth groove 2122. The fourth groove 2122 is provided on a part of the second limiting wall B2, rather than on the entire second limiting wall B2, so that a part of the limiting wall in the second limiting wall B2 can be used to limit the first limiting portion 241.

[0107] Exemplarily, in combination with Figures 2 to 4 , and Figure 12 , in the second time period, the first limiting portion 241 is located in the third groove 2121, the pushing portion 243 is located in the fourth groove 2122, and the second limiting wall B2 can limit the first limiting portion 241 from moving from the third groove 2121 to the fourth groove 2122.

[0108] In summary, the sliding groove 212 includes a third groove 2121 and a fourth groove 2122, and the third groove 2121, the fourth groove 2122 and the connecting hole 211 are communicated with each other. In this way, during the process of the connecting rod 100 pushing against the slider 240 in the second period, and when the connecting rod 100 is connected to the positioning core 210, the first limiting portion 241 can be located in the third groove 2121, and the pushing portion 243 can be located in the fourth groove 2122. The fourth groove 2122 is provided on the second limiting wall B2 of the third groove 2121 close to the fourth groove 2122, and the fourth groove 2122 is only provided on a part of the second limiting wall B2. In this way, a part of the limiting wall in the second limiting wall B2 can be used to limit the first limiting portion 241, which is convenient for reducing the possibility of the first limiting portion 241 moving from the third groove 2121 to the fourth groove 2122, thereby improving the position stability of the slider 240 relative to the positioning core 210 when the slider 240 abuts against the connecting rod 100.

[0109] Please continue to refer to Figure 2 、 Figure 8 、 Figure 11 and Figure 12 In some embodiments, the knob handle 200 may further include an elastic member 260. One end of the elastic member 260 abuts against the pushing portion 243, and the other end of the elastic member 260 abuts against the bottom of the sliding groove 212.

[0110] Wherein, the bottom of the sliding groove 212 that abuts against the other end of the elastic member 260 is a groove wall in the groove wall of the sliding groove 212 that is opposite to the position of the groove opening of the sliding groove 212. As described above, the groove opening of the sliding groove 212 is located on the side of the positioning core 210 facing the push plate 230.

[0111] The elastic member 260 may be an elastic structural member such as a spring or a spring piece.

[0112] In the first period, the elastic member 260 may be in a free state or a compressed state, and the embodiments of the present application do not limit this.

[0113] One end of the elastic member 260 abuts against the pushing portion 243, and the other end of the elastic member 260 abuts against the bottom of the sliding groove 212. With such a setting, in the first period, the setting of the elastic member 260 can press the slider 240 tightly against the bottom of the limiting groove 232, reducing the possibility of the initial position of the slider 240 changing due to the shaking of the knob handle 200.

[0114] In the second time period, during the process of the connecting rod 100 moving along the direction from the limiting groove 232 to the sliding groove 212, the connecting rod 100 pushes against the slider 240, causing the slider 240 to move along the direction from the limiting groove 232 to the sliding groove 212. During this process, the elastic member 260 is compressed and stores energy. The arrangement of the elastic member 260 can generate a certain resistance to the movement of the slider 240 along the direction from the limiting groove 232 to the sliding groove 212, reducing the possibility of collision between the slider 240 and the bottom of the sliding groove 212 due to the too fast moving speed of the slider 240, thereby reducing the possibility of damage to the slider 240. In addition, when the connecting rod 100 disengages from the positioning core 210, the pushing force of the connecting rod 100 on the slider 240 is cancelled, and the elastic member 260 can release elastic potential energy to reset the slider 240.

[0115] When the elastic member 260 is a spring, further, in some embodiments, such as Figures 3 to 5 , and Figure 12 as shown, a convex column 244 may be provided on the pushing portion 243 along the direction from the limiting groove 232 to the sliding groove 212, and the spring is sleeved on the convex column 244.

[0116] The convex column 244 may be any shape such as a cylinder or a prism, and the embodiments of the present application do not limit this.

[0117] The spring is sleeved on the convex column 244, so that the convex column 244 can limit the spring. In this way, the possibility of the spring tilting can be reduced during the process of the slider 240 moving along the direction from the limiting groove 232 to the sliding groove 212 and during the process of the slider 240 moving along the direction from the sliding groove 212 to the limiting groove 232. When the spring does not tilt, the spring can well play the role of restricting the initial position of the slider 240 and resetting the slider 240.

[0118] Based on the description of the previous embodiments, when the slider 240 includes a first limiting portion 241, a second limiting portion 242 and a pushing portion 243 that are connected to each other, and the pushing portion 243 is provided with a convex column 244, the first limiting portion 241, the second limiting portion 242, the pushing portion 243 and the convex column 244 may be integrally formed.

[0119] With such an arrangement, on the one hand, the assembly processes of the various parts in the slider 240 can be saved, and the assembly efficiency of the knob handle 200 can be improved. On the other hand, the connection strength between the various parts of the integrally formed slider 240 is relatively high, which is convenient for ensuring the overall structural strength of the slider 240.

Claims

1. A knob handle is connected to the horse protection body through a connecting rod, characterized in that Comprising: A housing; A positioning core, installed in the housing, the positioning core is provided with a connecting hole and a sliding groove that communicate with each other, the connecting hole is for the connecting rod to extend into, so that the connecting rod is connected to the positioning core; A push plate, installed in the housing, the push plate is provided with a through hole, the through hole communicates with the connecting hole and is opposite in position, the through hole is for the connecting rod to pass through; on the side of the push plate facing the positioning core, a limiting groove is further provided, and the limiting groove communicates with the through hole; A slider; In the first period, a part of the slider is located in the limiting groove, and another part of the slider is located in the sliding groove to limit the relative rotation of the positioning core with respect to the housing; In the second period, the slider can move along the direction from the limiting groove to the sliding groove under the pushing of the connecting rod, so that a part of the slider located in the limiting groove moves to be located in the sliding groove, releasing the restriction on the positioning core; Wherein, the first period is the period corresponding to when the connecting rod is not connected to the positioning core, and the second period is the period corresponding to the process of the connecting rod connecting to the positioning core.

2. The knob handle according to claim 1, wherein The slider includes a first limiting portion, a second limiting portion and a pushing portion that are connected to each other; In the first period, the first limiting portion is located in the limiting groove, and the second limiting portion is located in the sliding groove; and, in the first period, at least a part of the pushing portion is located in the through hole and / or the connecting hole; In the second period, the pushing portion can abut against the connecting rod, and under the pushing of the connecting rod, the pushing portion drives the slider to move along the direction from the limiting groove to the sliding groove, so that the first limiting portion moves from the limiting groove to the sliding groove, releasing the restriction on the positioning core.

3. The knob handle according to claim 2, wherein, The first limiting portion is of a solid structure, the second limiting portion is provided with a hollowed-out portion, and the pushing portion is connected to the first limiting portion.

4. The knob handle according to claim 3, wherein, The limiting groove includes a first groove and a second groove, the second groove is located between the first groove and the through hole, and the first groove, the second groove and the through hole are connected; The first groove includes a first limiting wall close to the second groove, and the second groove is provided on a part of the first limiting wall; In the first period, the first limiting portion is located in the first groove, a part of the pushing portion is located in the second groove, and another part of the pushing portion is located in the through hole, and the first limiting wall can limit the first limiting portion from moving from the first groove to the second groove.

5. The knob handle according to claim 3, wherein The sliding groove includes a third groove and a fourth groove, the fourth groove is located between the third groove and the connecting hole, and the third groove, the fourth groove and the connecting hole are connected; The third groove includes a second limiting wall close to the fourth groove, and the fourth groove is provided on a part of the second limiting wall; In the second period, the first limiting portion is located in the third groove, the pushing portion is located in the fourth groove, and the second limiting wall can limit the first limiting portion from moving from the third groove to the fourth groove.

6. The knob handle according to claim 2, characterized in that, The first limiting portion is provided with a hollowed-out portion, the second limiting portion is of a solid structure, and the pushing portion is connected to the second limiting portion.

7. The knob handle according to any one of claims 2 to 6, characterized in that, The knob handle further includes an elastic member, one end of the elastic member abuts against the abutting portion, and the other end of the elastic member abuts against the bottom of the sliding groove.

8. The knob handle according to claim 7, characterized in that, The elastic member is a spring, the abutting portion is provided with a convex column along the direction from the limiting groove to the sliding groove, and the spring is sleeved on the convex column.

9. The knob handle according to claim 8, wherein, The first limiting portion, the second limiting portion, the abutting portion and the convex column are integrally formed.

10. A motor protection device, characterized in that, It includes a horse protection body, a connecting rod and the knob handle according to any one of claims 1 to 9, and the horse protection body and the knob handle are connected by the connecting rod.

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