Electric straight stroke actuator

Abstract

The utility model relates to the technical field of electric actuators, in particular to an electric straight stroke actuator which comprises an electric actuator body, a nut and a connecting assembly, and the connecting assembly comprises a guide part, a connecting seat, a mounting frame, an adjusting part and two fixing structures. The adjusting part is operated to control the connecting block in the fixing structure to move, and the connecting block moves to drive the clamping parts to be close to or away from each other, so that the clamping parts are matched with a valve needing to be fixed in size, and the problem that an existing straight-stroke electric actuator is inconvenient to use is solved. The problems that the size of a nut overhanging connecting part on an electric actuator body is fixed, the nut overhanging connecting part can only be connected with a valve with an adaptive size for use, the nut overhanging connecting part cannot be adaptive to valves with more sizes for straight stroke operation, and therefore the universality is not high are solved.

Description

Technical Field

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

[0002] An electric linear actuator is a driving device that can provide linear motion. It uses electric drive and works under the action of a certain control signal. Electric linear actuators are generally used to drive valves to the fully open or fully closed position.

[0003] The prior art (CN202327310U) discloses a linear electric actuator, wherein the electric actuator body comprises a housing and a worm gear, and the linear electric actuator also comprises a guide seat, a guide column, a screw and a nut. The guide seat is fixed outside the housing, and the guide seat has a guide hole. The nut is slidably arranged in the guide hole and guided by the guide hole. A guide plate is installed on the extended connecting part of the nut outside the guide hole. Both ends of the guide plate are slidably arranged on the guide column and guided by the guide column. The guide column is fixedly installed on the housing, and the screw is threadedly connected to the nut. The screw is fixed on the worm gear or on an output shaft connected to the worm gear, thereby realizing the linear output function of the electric actuator and further expanding the application scope of the electric actuator.

[0004] However, when the above method is adopted, the size of the nut extending connection part on the electric actuator body is fixed and can only be connected to a valve of an adapted size. It cannot be adapted to valves of more sizes for linear stroke operation, so the versatility is not high. Utility Model Content

[0005] The utility model aims to provide an electric linear actuator, aiming to solve the problem of low versatility in existing linear electric actuators, in which the size of the nut extending connection part on the electric actuator body is fixed and can only be connected to valves of matching sizes, but cannot be adapted to valves of more sizes for linear operation.

[0006] To achieve the above object, the utility model provides an electric linear actuator, comprising an electric actuator body, a nut and a connecting assembly, wherein the nut is arranged on one side of the electric actuator body.

[0007] The connecting assembly includes a guide member, a connecting seat, a mounting frame, an adjusting member and two fixing structures;

[0008] The guide member is arranged on one side of the electric actuator body; the connecting seat is fixedly connected to the nut and is located on one side of the nut; the mounting frame is fixedly connected to the connecting seat and is located on one side of the connecting seat; the adjusting member is arranged on one side of the mounting frame; the two fixing structures are respectively located on both sides of the adjusting member; the fixing structure includes a connecting block and a clamping member, the connecting block is fixedly connected to the adjusting member and is located on one side of the adjusting member; the clamping member is arranged on one side of the connecting block.

[0009] Wherein, the guide member includes two guide columns, two guide blocks and a guide plate, the two guide columns are respectively fixedly connected to the electric actuator body and are respectively located on one side of the electric actuator body; the two guide blocks are respectively slidably connected to the two guide columns and are respectively located on one side of the two guide columns; the guide plate is respectively fixedly connected to the two guide blocks and is located between the two guide blocks.

[0010] Among them, the adjusting part includes a double-threaded screw, an adjusting knob, a guide rail and two adjusting blocks, the double-threaded screw is rotatably connected to the installation frame and is located on one side of the installation frame; the adjusting knob is fixedly connected to the double-threaded screw and is located on one side of the double-threaded screw; the guide rail is fixedly connected to the installation frame and is located on one side of the installation frame; the two adjusting blocks are respectively threadedly connected to the double-threaded screw, and are respectively slidably connected to the guide rails, and then fixedly connected to the two connecting blocks, and are respectively located on one side of the double-threaded screw.

[0011] Wherein, the clamping member includes a connecting plate, a first rod, a second rod, a rebound spring and a clamping block, the connecting plate is fixedly connected to the connecting block and is located on one side of the connecting block; the first rod is fixedly connected to the connecting plate and is located on one side of the connecting plate; the second rod is fixedly connected to the first rod and is located on one side of the first rod; the rebound spring is fixedly connected to the first rod and the second rod respectively and is located between the first rod and the second rod; the clamping block is fixedly connected to the second rod and is located on one side of the second rod; the clamping block has an arc-shaped clamping groove, and the arc-shaped clamping groove is located on one side of the clamping block.

[0012] Wherein, the electric linear actuator further includes an auxiliary connecting member, and the auxiliary connecting member is arranged on one side of the electric actuator body.

[0013] Wherein, the auxiliary connecting member includes a bracket and a flange fixing ring, the bracket is fixedly connected to the electric actuator body and is located on one side of the electric actuator body; the flange fixing ring is fixedly connected to the bracket and is located on one side of the bracket.

[0014] Compared with the prior art, the utility model has the following beneficial effects:

[0015] 1. By arranging the guide member, the connecting seat, the mounting frame, the adjusting member and the two fixing structures, the connecting seat is used to support the installation of the mounting frame. When it is necessary to connect and assemble with valves of different sizes, the adjusting member is operated to control the connection block in the fixing structure to move. The movement of the connection block drives the clamping members to move closer to or away from each other, so that the clamping members match the size of the valve to be fixed, thereby solving the problem of the existing linear electric actuator, in which the size of the nut extending connection part on the electric actuator body is fixed and can only be connected and used with valves of adapted sizes, and cannot be adapted to valves of more sizes for linear operation, and therefore the problem of low versatility.

[0016] 2. By setting two guide posts, two guide blocks and the guide plate, the guide plate is fixedly set on the nut, and the guide blocks cooperate with the guide posts, so that the electric actuator body drives the nut to output a straight stroke more smoothly.

[0017] 3. By providing the connecting plate, the first rod, the second rod, the rebound spring and the clamping block, the first rod and the second rod cooperate with the rebound spring to provide elastic expansion force so that the clamping block is more stable when buckled with the valve connecting part.

[0018] 4. By providing the bracket and the flange fixing ring, the bracket supports the installation of the flange fixing ring, so that when the electric actuator body and the valve are assembled, the flange fixing ring and the flange of the valve are used for auxiliary assembly and fixing, thereby increasing the stability of the assembly of the electric actuator body and the valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] 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.

[0020] Figure 1 It is a schematic diagram of the overall structure of the first embodiment of the utility model.

[0021] Figure 2 It is an overall front view of the first embodiment of the utility model.

[0022] Figure 3 It is a cross-sectional view of the fixing structure of the first embodiment of the utility model.

[0023] Figure 4 It is a schematic diagram of the overall structure of the second embodiment of the utility model.

[0024] 101-electric actuator body, 102-nut, 103-guide, 104-connecting seat, 105-installation frame, 106-adjusting member, 107-fixing structure, 108-connecting block, 109-clamping member, 110-guide column, 111-guide block, 112-guide plate, 113-double-threaded screw, 114-adjusting twist, 115-guide rail, 116-adjusting block, 117-connecting plate, 118-first rod, 119-second rod, 120-rebound spring, 121-clamping block, 122-arc-shaped clamping groove, 201-auxiliary connecting member, 202-bracket, 203-flange fixing ring. DETAILED DESCRIPTION

[0025] The first embodiment of the present application is:

[0026] See also Figure 1-Figure 3 ,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 front view of the whole of the first embodiment of the utility model. Figure 3 It is a cross-sectional view of the fixing structure of the first embodiment of the utility model.

[0027] The utility model discloses an electric linear actuator, comprising an electric actuator body 101, a nut 102 and a connecting assembly, wherein the connecting assembly comprises a guide member 103, a connecting seat 104, a mounting frame 105, an adjusting member 106 and two fixing structures 107, wherein the fixing structure 107 comprises a connecting block 108 and a clamping member 109, the guide member 103 comprises two guide columns 110, two guide blocks 111 and a guide plate 112, the adjusting member 106 comprises a double-threaded screw 113, an adjusting knob 114, The guide rail 115 and two adjustment blocks 116, the clamping member 109 includes a connecting plate 117, a first rod 118, a second rod 119, a rebound spring 120 and a clamping block 121, and the clamping block 121 has an arc-shaped clamping groove 122. The above-mentioned scheme solves the problem that the existing linear electric actuator has a fixed size of the extended connecting part of the nut 102 on the electric actuator body 101 and can only be connected to a valve of an adapted size, and cannot be adapted to valves of more sizes for linear operation, so the versatility is not high.

[0028] For this specific implementation, the electric actuator body 101 drives the nut 102 to cooperate with the connection between the connecting assembly and the valve to control the straight stroke output of the valve. The specific structure refers to the patent document with publication number CN202327310U, which will not be elaborated here.

[0029] The guide member 103 is arranged on one side of the electric actuator body 101; the connecting seat 104 is fixedly connected to the nut 102 and is located on one side of the nut 102; the mounting frame 105 is fixedly connected to the connecting seat 104 and is located on one side of the connecting seat 104; the adjusting member 106 is arranged on one side of the mounting frame 105; the two fixing structures 107 are respectively located on both sides of the adjusting member 106; the fixing structure 107 includes a connecting block 108 and a clamping member 109, the connecting block 108 is fixedly connected to the adjusting member 106 and is located on one side of the adjusting member 106; the clamping member 109 is arranged on one side of the connecting block 108, and the connecting seat 104 is used to support the mounting frame 10 5, the guide member 103 is used for the electric actuator body 101 to drive the nut 102 to drive the linear stroke more smoothly. When it is necessary to connect and assemble with valves of different sizes, the adjusting member 106 is operated to control the connection block 108 in the fixed structure 107 to move. The movement of the connection block 108 drives the clamping members 109 to move closer to or away from each other, so that the clamping members 109 match the size of the valve to be fixed, thereby solving the problem that the existing linear stroke electric actuator has a fixed size of the extended connection part of the nut 102 on the electric actuator body 101 and can only be connected and used with a valve of an adapted size, and cannot be adapted to valves of more sizes for linear stroke operation, so the versatility is not high.

[0030] Secondly, the two guide posts 110 are respectively fixedly connected to the electric actuator body 101 and are respectively located on one side of the electric actuator body 101; the two guide blocks 111 are respectively slidably connected to the two guide posts 110 and are respectively located on one side of the two guide posts 110; the guide plate 112 is respectively fixedly connected to the two guide blocks 111 and is located between the two guide blocks 111. The guide plate 112 is fixedly arranged on the nut 102. The guide blocks 111 cooperate with the guide posts 110, so that the electric actuator body 101 drives the nut 102 to perform linear output more smoothly.

[0031] Again, the double-threaded screw 113 is rotatably connected to the installation frame 105 and is located on one side of the installation frame 105; the adjusting knob 114 is fixedly connected to the double-threaded screw 113 and is located on one side of the double-threaded screw 113; the guide rail 115 is fixedly connected to the installation frame 105 and is located on one side of the installation frame 105; the two adjusting blocks 116 are respectively threadedly connected to the double-threaded screw 113, and are respectively slidably connected to the guide rail 115, and are then fixedly connected to the two connecting blocks 108, and are respectively located on one side of the double-threaded screw 113. Twisting the adjusting knob 114 causes the double-threaded screw 113 to rotate and drive the two adjusting blocks 116 to slide on the guide rail 115, thereby controlling the clamping members 109 to approach or move away from each other, so that the clamping member 109 is fixed to the connecting part of the valve.

[0032] In addition, the connecting plate 117 is fixedly connected to the connecting block 108 and is located on one side of the connecting block 108; the first rod 118 is fixedly connected to the connecting plate 117 and is located on one side of the connecting plate 117; the second rod 119 is fixedly connected to the first rod 118 and is located on one side of the first rod 118; the rebound spring 120 is fixedly connected to the first rod 118 and the second rod 119 respectively and is located between the first rod 118 and the second rod 119; the clamping block 121 is fixedly connected to the second rod 119 and is located on one side of the second rod 119; the clamping block 121 has an arc-shaped clamping groove 122, and the arc-shaped clamping groove 122 is located on one side of the clamping block 121. The first rod 118 and the second rod 119 cooperate with the rebound spring 120 to provide elastic expansion force so that the clamping block 121 is more stable when it is buckled with the valve connecting part.

[0033] When using the electric linear actuator described in the utility model, the connecting seat 104 is used to support the installation of the installation frame 105. The guide block 111 cooperates with the guide column 110, so that the electric actuator body 101 drives the nut 102 to output a linear stroke more smoothly. When it is necessary to connect and assemble with valves of different sizes, the adjusting knob 114 is twisted to rotate the double-threaded screw 113 to drive the two adjusting blocks 116 to slide on the guide rail 115, and the clamping members 109 are controlled to move closer to each other. Or they are far away from each other, so that the clamping member 109 matches the size of the valve to be fixed, and the first rod 118 and the second rod 119 cooperate with the rebound spring 120 to provide elastic expansion force so that the clamping block 121 is more stable when it is buckled with the valve connecting part, thereby solving the problem of the existing linear electric actuator, that the size of the protruding connecting part of the nut 102 on the electric actuator body 101 is fixed and can only be connected to a valve of an adapted size, and cannot be adapted to valves of more sizes for linear operation, so the versatility is not high.

[0034] The second embodiment of the present application is:

[0035] See also Figure 4 ,in, Figure 4 It is a schematic diagram of the overall structure of the second embodiment of the utility model.

[0036] On the basis of the first embodiment, the utility model provides an electric linear actuator, which further includes an auxiliary connecting member 201 , and the auxiliary connecting member 201 includes a bracket 202 and a flange fixing ring 203 .

[0037] The auxiliary connecting member 201 is disposed on one side of the electric actuator body 101 , and the auxiliary connecting member 201 is used for auxiliary fixation when the electric actuator body 101 is connected to the valve.

[0038] Secondly, the bracket 202 is fixedly connected to the electric actuator body 101 and is located on one side of the electric actuator body 101; the flange fixing ring 203 is fixedly connected to the bracket 202 and is located on one side of the bracket 202. The bracket 202 supports the installation of the flange fixing ring 203, so that when the electric actuator body 101 and the valve are assembled, the flange fixing ring 203 and the flange of the valve are used for auxiliary assembly and fixation, thereby increasing the stability of the assembly of the electric actuator body 101 and the valve.

[0039] In the electric linear actuator described in this embodiment, the bracket 202 supports the installation of the flange fixing ring 203, so that when the electric actuator body 101 and the valve are assembled, the flange fixing ring 203 and the flange of the valve are assisted to be assembled and fixed, thereby increasing the stability of the assembly of the electric actuator body 101 and the valve.

[0040] 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. An electric linear actuator, comprising an electric actuator body and a nut, wherein the nut is arranged on one side of the electric actuator body; characterized in that: Also includes connection components, The connecting assembly includes a guide member, a connecting seat, a mounting frame, an adjusting member and two fixing structures; The guide member is arranged on one side of the electric actuator body; the connecting seat is fixedly connected to the nut and is located on one side of the nut; the mounting frame is fixedly connected to the connecting seat and is located on one side of the connecting seat; the adjusting member is arranged on one side of the mounting frame; the two fixing structures are respectively located on both sides of the adjusting member; the fixing structure includes a connecting block and a clamping member, the connecting block is fixedly connected to the adjusting member and is located on one side of the adjusting member; the clamping member is arranged on one side of the connecting block.

2. An electric linear actuator as claimed in claim 1, characterized in that: The guide member includes two guide columns, two guide blocks and a guide plate. The two guide columns are respectively fixedly connected to the electric actuator body and are respectively located on one side of the electric actuator body; the two guide blocks are respectively slidably connected to the two guide columns and are respectively located on one side of the two guide columns; the guide plate is respectively fixedly connected to the two guide blocks and is located between the two guide blocks.

3. An electric linear actuator as claimed in claim 2, characterized in that: The adjusting member includes a double-threaded screw, an adjusting knob, a guide rail and two adjusting blocks. The double-threaded screw is rotatably connected to the mounting frame and is located on one side of the mounting frame; the adjusting knob is fixedly connected to the double-threaded screw and is located on one side of the double-threaded screw; the guide rail is fixedly connected to the mounting frame and is located on one side of the mounting frame; the two adjusting blocks are respectively threadedly connected to the double-threaded screw, and are respectively slidably connected to the guide rails, and are then fixedly connected to the two connecting blocks, and are respectively located on one side of the double-threaded screw.

4. An electric linear actuator as claimed in claim 3, characterized in that: The clamping member includes a connecting plate, a first rod, a second rod, a rebound spring and a clamping block, wherein the connecting plate is fixedly connected to the connecting block and is located at one side of the connecting block; the first rod is fixedly connected to the connecting plate and is located at one side of the connecting plate; the second rod is fixedly connected to the first rod and is located at one side of the first rod; the rebound spring is fixedly connected to the first rod and the second rod respectively and is located between the first rod and the second rod; the clamping block is fixedly connected to the second rod and is located at one side of the second rod; the clamping block has an arc-shaped clamping groove, and the arc-shaped clamping groove is located at one side of the clamping block.

5. The electric linear actuator according to claim 1, characterized in that: The electric linear actuator further comprises an auxiliary connecting piece, and the auxiliary connecting piece is arranged on one side of the electric actuator body.

6. An electric linear actuator as claimed in claim 5, characterized in that: The auxiliary connecting member includes a bracket and a flange fixing ring. The bracket is fixedly connected to the electric actuator body and is located on one side of the electric actuator body; the flange fixing ring is fixedly connected to the bracket and is located on one side of the bracket.

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