Limiting mechanism of electric actuator

Abstract

The utility model relates to the technical field of electric actuators, in particular to an electric actuator limiting mechanism which comprises a shell and a rotating mechanism, the rotating mechanism comprises a first gear, a second gear, a first spring, a rotating shaft, two connecting rods, a rotating ring, two terminals and a reset assembly, the first gear is rotatably connected with the shell and located on one side of the shell, and the second gear is located on the other side of the shell. The second gear is rotatably connected with the shell, one end of the rotating shaft is fixedly connected with the second gear, the other end of the rotating shaft is rotatably connected with the shell, the first gear drives the second gear to rotate, so that the rotating ring rotates correspondingly, the two connecting rods make contact with the corresponding terminals, the second gear continues to rotate, the first spring is twisted, and the connecting rods are prevented from being broken; through the arrangement of the structure, the problems that in the prior art, the cam deviates due to stress to drive the baffle to move, so that the terminal is communicated, the baffle and the terminal are abraded after being used for a long time, and the limiting effect on the electric actuator becomes poor are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of electric actuators, in particular to a limiting mechanism of an electric actuator. Background Art

[0002] An electric actuator is a driving device that can provide linear or rotary motion. It uses a certain driving energy source and works under the action of a certain control signal. The collision of the moving parts of the production machinery is used to make its contacts move to connect or disconnect the control circuit and achieve a certain control purpose. When the electric actuator is working, a travel switch is usually used for automatic limit. However, there are some shortcomings in the existing limit mechanism during use. For example, the cam of the travel switch will be worn during use and needs to be replaced regularly, which is inconvenient to replace the cam; and when the load of the actuator is heavy, the cam may be offset due to the large force, and the cam cannot contact the push rod, and the limit mechanism cannot play a limiting role.

[0003] In the prior art, the patent (CN211907271U) mentions an automatic limit mechanism of an electric actuator, including a limit mechanism outer shell, a transmission structure is arranged at the top of the limit mechanism outer shell, and a limit bolt is arranged on the limit mechanism outer shell, the transmission structure includes a cam, a rotating structure is installed on one side of the transmission structure, the torsion bar spring is arranged at one end of the spline shaft, and the torsion bar spring extends to the interior of the transmission structure and is fixedly connected to the cam, and a limit structure is arranged inside the limit mechanism outer shell. The prior art installs the cam on the torsion bar spring at one end of the spline shaft. When the cam is replaced or the cam is offset by force, it can be easily adjusted without tools, and it is also easier to disassemble the cam, which solves the problem that the cam of the travel switch will be worn during use and the cam replacement is inconvenient.

[0004] However, in the above-mentioned prior art, the cam is offset by force and drives the baffle to move, so that the terminals are connected. The baffle and the terminals will be worn out after long-term use, and the limiting effect of the electric actuator will be deteriorated. Utility Model Content

[0005] The utility model aims to provide a limiting mechanism for an electric actuator, which solves the problem in the prior art that the cam is offset by force and drives the baffle to move, so that the terminals are connected, and the baffle and the terminals will wear out after long-term use, which deteriorates the limiting effect of the electric actuator.

[0006] To achieve the above-mentioned purpose, the utility model provides a limiting mechanism of an electric actuator, including a shell and a rotating mechanism, the rotating mechanism including a first gear, a second gear, a first spring, a rotating shaft, two connecting rods, a rotating ring, two terminals and a reset assembly, the first gear is rotatably connected to the shell and is located on one side of the shell, the second gear is rotatably connected to the shell and is located on one side of the first gear, and the first gear is clamped with the second gear, one end of the rotating shaft is fixedly connected to the second gear, the other end of the rotating shaft is rotatably connected to the shell and is located below the second gear, the two terminals are fixedly connected to the shell and are arranged on both sides of the rotating shaft in opposite directions, one end of the first spring is fixedly connected to the second gear, the other end of the first spring is fixedly connected to the rotating ring, the rotating ring and the first spring are both sleeved on the surface of the rotating shaft, and the two connecting rods are fixedly connected to the rotating ring and are located on both sides of the rotating ring.

[0007] Wherein, the reset assembly includes a central shaft and a second spring, the central shaft is fixedly connected to the first gear and is located below the first gear, one end of the second spring is fixedly connected to the first gear, and the other end of the second spring is fixedly connected to the outer shell and is sleeved on the surface of the central shaft.

[0008] Wherein, the connecting rod comprises a connecting rod body and a connecting block, the connecting block is fixedly connected to the connecting rod body and is located at one end of the connecting rod body, and the connecting block is adapted to the terminal.

[0009] Wherein, the electric actuator limiting mechanism further includes a protective cover, which is fixedly connected to the shell and located at one end of the shell.

[0010] Among them, the electric actuator limiting mechanism also includes a transmission assembly, the transmission assembly includes a rotating block, two rotating wheels and a limiting block, the rotating block is fixedly connected to the first gear and is located above the shell, and the rotating block is arranged in a triangular shape, the two rotating wheels are fixedly connected to the rotating block and are located at both ends of the rotating block, the limiting block is fixedly connected to the shell and is located on one side of the rotating block, and the limiting block is in contact with the rotating block.

[0011] The utility model discloses a limiting mechanism of an electric actuator, wherein the first gear is rotatably connected to the housing and is located on one side of the housing, the second gear is rotatably connected to the housing and is located on one side of the first gear, and the first gear is clamped with the second gear, one end of the rotating shaft is fixedly connected to the second gear, the other end of the rotating shaft is rotatably connected to the housing and is located below the second gear, two terminals are fixedly connected to the housing and are arranged on both sides of the rotating shaft in opposite directions, one end of the first spring is fixedly connected to the second gear, the other end of the first spring is fixedly connected to the rotating ring, the rotating ring and the first spring are both sleeved on the surface of the rotating shaft, the two connecting rods are fixedly connected to the rotating ring and are located on both sides of the rotating ring, the first gear drives the second gear to rotate, so that the rotating ring rotates accordingly, the two connecting rods contact the corresponding terminals, the second gear continues to rotate, and the first spring twists to prevent the connecting rod from being broken. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art are briefly introduced below.

[0013] Figure 1 It is a schematic diagram of the overall structure of the first embodiment of the utility model.

[0014] Figure 2 It is a schematic diagram of the internal structure of the first embodiment of the utility model.

[0015] Figure 3 It is an overall structural diagram of the second embodiment of the utility model.

[0016] Figure 4 It is a schematic diagram of the internal structure of the second embodiment of the utility model.

[0017] 101-housing, 102-protective cover, 103-first gear, 104-second gear, 105-first spring, 106-rotating shaft, 107-rotating ring, 108-terminal, 109-central shaft, 110-second spring, 111-connecting rod body, 112-connecting block, 201-rotating block, 202-rotating wheel, 203-limiting block. DETAILED DESCRIPTION

[0018] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0019] First embodiment:

[0020] See also Figure 1 and Figure 2 ,in, Figure 1 It is a schematic diagram of the overall structure of the first embodiment of the utility model. Figure 2 It is a schematic diagram of the internal structure of the first embodiment of the utility model.

[0021] The utility model provides a limiting mechanism for an electric actuator, comprising a housing 101, a rotating mechanism and a protective cover 102, wherein the rotating mechanism comprises a first gear 103, a second gear 104, a first spring 105, a rotating shaft 106, two connecting rods, a rotating ring 107, two terminals 108 and a reset assembly, wherein the reset assembly comprises a central axis 109 and a second spring 110, and the connecting rod comprises a connecting rod body 111 and a connecting block 112. The above-mentioned scheme solves the problem that the cam is offset by force and drives the baffle to move, so that the terminal 108 is connected, and the baffle and the terminal 108 will wear out after long-term use, thereby deteriorating the limiting effect of the electric actuator.

[0022] According to the present specific embodiment, the first gear 103 is rotatably connected to the housing 101 and is located at one side of the housing 101. The second gear 104 is rotatably connected to the housing 101 and is located at one side of the first gear 103. The first gear 103 is engaged with the second gear 104. One end of the rotating shaft 106 is fixedly connected to the second gear 104. The other end of the rotating shaft 106 is rotatably connected to the housing 101 and is located below the second gear 104. The two terminals 108 are fixedly connected to the housing 101 and are arranged on both sides of the rotating shaft 106 in opposite directions. One end of the first spring 105 is fixedly connected to the second gear 104, and the other end of the first spring 105 is fixedly connected to the rotating ring 107. The rotating ring 107 and the first spring 105 are both sleeved on the surface of the rotating shaft 106. The two connecting rods are fixedly connected to the rotating ring 107 and are located on both sides of the rotating ring 107. The first gear 103 drives the second gear 104 to rotate, so that the rotating ring 107 rotates accordingly. The two connecting rods contact the corresponding terminals 108, and the second gear 104 continues to rotate. The first spring 105 twists to prevent the connecting rods from being broken.

[0023] Among them, the central axis 109 is fixedly connected to the first gear 103 and is located below the first gear 103. One end of the second spring 110 is fixedly connected to the first gear 103, and the other end of the second spring 110 is fixedly connected to the housing 101 and is sleeved on the surface of the central axis 109. When the first gear 103 rotates, the second spring 110 twists. After the moving part leaves, the second spring 110 twists to drive the first gear 103 to rotate, so that the second gear 104 rotates, and the connecting rod leaves the terminal 108.

[0024] Secondly, the connecting block 112 is fixedly connected to the connecting rod body 111 and is located at one end of the connecting rod body 111. The connecting block 112 is adapted to the terminal 108. When the connecting rod rotates, the connecting block 112 contacts the terminal 108 to connect the two terminals 108.

[0025] Meanwhile, the protective cover 102 is fixedly connected to the housing 101 and is located at one end of the housing 101 . The provision of the protective cover 102 facilitates external electrical connection with the terminal 108 .

[0026] When the utility model is used, the moving part moves, and the first gear 103 drives the second gear 104 to rotate, so that the rotating ring 107 rotates accordingly, and the two connecting rod bodies 111 contact the corresponding terminals 108 to connect the two terminals 108. The second gear 104 continues to rotate, and the first spring 105 twists to prevent the connecting rod body 111 from being broken. When the first gear 103 rotates, the second spring 110 twists. After the moving part leaves, the second spring 110 twists to drive the first gear 103 to rotate, so that the second gear 104 rotates, and the connecting rod body 111 leaves the terminal 108.

[0027] Second embodiment:

[0028] See also Figure 3 and Figure 4 ,in, Figure 3 It is a schematic diagram of the overall structure of the second embodiment of the utility model. Figure 4 It is a schematic diagram of the internal structure of the second embodiment of the utility model.

[0029] On the basis of the first embodiment, the utility model provides an electric actuator limiting mechanism, which also includes a transmission assembly, wherein the transmission assembly includes a rotating block 201, two rotating wheels 202 and a limiting block 203. Through the arrangement of the above structure, the problem of excessive rotation of the first gear 103 due to inertia when the second spring 110 drives the first gear 103 to reset is solved.

[0030] According to this specific embodiment, the transmission assembly includes a rotating block 201, two rotating wheels 202 and a limit block 203. The rotating block 201 is fixedly connected to the first gear 103 and is located above the housing 101. The rotating block 201 is arranged in a triangular shape. The two rotating wheels 202 are fixedly connected to the rotating block 201 and are located at both ends of the rotating block 201. The limit block 203 is fixedly connected to the housing 101 and is located on one side of the rotating block 201. The limit block 203 is in contact with the rotating block 201, and the moving part moves and presses on the corresponding rotating wheel 202. The rotating block 201 drives the first gear 103 to rotate. When the first gear 103 is reset, the limit block 203 blocks one side of the rotating block 201.

[0031] When the utility model is used, the moving part moves and presses on the corresponding rotating wheel 202, and the rotating block 201 drives the first gear 103 to rotate, so that the connecting rod body 111 drives the connecting block 112 to connect the two terminals 108. When the first gear 103 is reset, the limit block 203 blocks one side of the rotating block 201 to prevent the first gear 103 from excessive rotation.

[0032] What is disclosed above is only one or more preferred embodiments of the present application, and cannot be used to limit the scope of rights of the present application. Ordinary technicians in this field can understand that all or part of the processes of implementing the above embodiments and equivalent changes made according to the claims of the present application are still within the scope covered by the present application.

Claims

1. A limiting mechanism for an electric actuator, comprising a housing, characterized in that: The gear train is constructed by a process of moving the gears together and forming an angular channel between the side plates and the side plates of the gear train. The gear train is constructed by a process of moving the gears together and forming an angular channel between the side plates and the side plates of the gear train. The gear train is constructed by a process of moving the gears together and forming an angular channel between the side plates.

2. The electric actuator limiting mechanism according to claim 1, characterized in that: The reset assembly includes a central shaft and a second spring. The central shaft is fixedly connected to the first gear and is located below the first gear. One end of the second spring is fixedly connected to the first gear, and the other end of the second spring is fixedly connected to the housing and is sleeved on the surface of the central shaft.

3. The electric actuator limiting mechanism according to claim 2, characterized in that: The connecting rod comprises a connecting rod body and a connecting block, wherein the connecting block is fixedly connected to the connecting rod body and is located at one end of the connecting rod body, and the connecting block is adapted to the terminal.

4. The electric actuator limiting mechanism according to claim 1, characterized in that: The electric actuator limiting mechanism also includes a protective cover, which is fixedly connected to the shell and located at one end of the shell.

5. The electric actuator limiting mechanism according to claim 4, characterized in that: The electric actuator limiting mechanism also includes a transmission assembly, which includes a rotating block, two rotating wheels and a limiting block. The rotating block is fixedly connected to the first gear and is located above the shell, and the rotating block is arranged in a triangular shape. The two rotating wheels are fixedly connected to the rotating block and are located at both ends of the rotating block. The limiting block is fixedly connected to the shell and is located on one side of the rotating block, and the limiting block is in contact with the rotating block.

Images