A push rod actuator with improved static holding force

Abstract

The utility model discloses a kind of push rod actuators with promotion static holding force, comprising: shell, rack and spring piece, recess for rack movement is equipped on lower shell, rack is movably arranged in the recess of lower shell;Lower shell is located on the outside of rack and is equipped with positioning wall, the outside of positioning wall is equipped with positioning wall on the side of spring piece, the other side is equipped with positioning part, and the rack is located on the side of positioning wall and is equipped with the clamping groove matched with positioning part.The utility model said a kind of push rod actuators with promotion static holding force, by setting spring piece in shell, when rack reaches working stroke position, the positioning part of spring piece enters the clamping groove position of rack side edge, to effectively promote the static holding force of entire mechanism, in return process, spring head is resisted in rack side edge, sliding friction, does not affect rack to return to initial position, can greatly reduce its production cost, and practicality is strong.

Description

Technical Field

[0001] This utility model belongs to the field of manufacturing, and specifically relates to a push rod actuator with enhanced static holding force. Background Technology

[0002] Currently, high-end home appliances are developing towards intelligence, centralization, cabinet-style design, and integration. With the application of various automatic door opening and closing actuators, door handles are gradually being phased out. In many home appliance cases, push-rod actuators are used to push the door open to a certain travel position. The door's own weight and the springs inside the hinges generate a significant closing force. At this point, if the actuator is de-energized, it needs to pause for a few seconds to allow the user time to manually open the door. During these few seconds, the actuator itself must maintain a certain static holding force. The self-locking force of the geared motor alone cannot maintain this; other mechanisms are needed to maintain this static holding force. Many current mechanisms use magnets or other electric mechanisms, which are relatively complex to install and costly. Utility Model Content

[0003] Purpose of the utility model: In order to overcome the above shortcomings, the purpose of this utility model is to provide a push rod actuator with improved static holding force. By setting a spring plate in the housing, when the rack reaches the working stroke position, the positioning part of the spring plate enters the slot on the side of the rack, thereby effectively improving the static holding force of the entire mechanism. During the return process, the spring head abuts against the side of the rack and slides against it, without affecting the rack's return to the initial position. The use of a spring plate in this utility model can greatly reduce its production cost and has strong practicality.

[0004] Technical solution: In order to achieve the above objectives, this utility model provides a push rod actuator with enhanced static holding force, including: a lower housing, a rack and a spring plate, wherein the lower housing is provided with a groove for the rack to move, and the rack is movably disposed in the groove of the lower housing; The lower housing has a positioning wall located outside the rack. One side of the spring plate has the outer side of the positioning wall, and the other side has a positioning part. The rack has a groove on the side of the positioning wall that mates with the positioning part. During operation, the power source drives the rack to move. When the rack reaches its working stroke position, the positioning part of the spring plate enters the groove on the side of the rack, thereby increasing its static holding force. This utility model discloses a push rod actuator with enhanced static holding force. By setting a spring plate inside the housing, when the rack reaches its working stroke position, the positioning part of the spring plate enters the groove on the side of the rack, effectively improving the static holding force of the entire mechanism. During the return process, the spring head abuts against the side of the rack, sliding friction does not affect the rack's return to its initial position. The use of a spring plate in this utility model can greatly reduce its production cost, is highly practical, and better meet processing needs.

[0005] The spring sheet includes a first spring sheet body and a second spring sheet body. The second spring sheet body is inclined and disposed on one side of the first spring sheet body, with one end connected to the first spring sheet body and the other end connected to the positioning part. The spring sheet adopts a unique structural design, utilizing its spring to satisfy the positioning of the rack, and its normal operation is not affected when the rack moves.

[0006] Furthermore, the lower housing has a gap on the outer side of the positioning wall to accommodate the spring sheet. The spring sheet is fitted into the gap, and the first spring sheet body and the second spring sheet body are positioned on both sides of the positioning wall. The gap cooperates with the spring sheet. The positioning wall positions the spring sheet, ensuring its stability during use.

[0007] Preferably, the positioning part is V-shaped and mates with the slot. The V-shape facilitates its mating with the slot on the rack.

[0008] In addition, it also includes a drive mechanism, a drive gear set and an upper housing. The drive mechanism is located in the mounting cavity of the lower housing and has a drive shaft at its output end. The drive gear set is connected to the drive shaft and meshes with a rack. The upper housing and the lower housing are arranged vertically opposite each other and are connected by a connector and cooperate with each other. Microswitches are provided on both sides of the drive mechanism. The rack has an opening direction slot and a closing direction slot on the side away from the spring plate. The opening direction slot and the closing direction slot cooperate with the corresponding microswitches.

[0009] Further preferably, the lower housing is provided with a platform for facilitating the movement of the rack, with an opening on one side, and a limiting groove is provided on the lower housing.

[0010] A limiting block is provided below the rack, which cooperates with a limiting groove on the lower housing. When the rack moves a certain distance, the limiting block moves to the end of the limiting groove and is stuck, preventing the rack from moving forward further. The limiting block limits the travel of the rack and prevents it from moving excessively.

[0011] The lower housing contains a set of limiting posts located at one end of the opening, with the limiting posts positioned on both sides of the rack. The limiting posts effectively limit the rack from both sides.

[0012] As can be seen from the above technical solution, this utility model has the following beneficial effects: This utility model discloses a push rod actuator with enhanced static holding force. By setting a spring plate inside the housing, when the rack reaches the working stroke position, the positioning part of the spring plate enters the slot on the side of the rack, thereby effectively enhancing the static holding force of the entire mechanism. During the return process, the spring head abuts against the side of the rack, sliding friction, without affecting the rack's return to the initial position. The use of a spring plate in this utility model can greatly reduce its production cost, has strong practicality, and can better meet the needs of processing, avoiding the need for continuous power from other power sources.

[0013] 2. The spring sheet adopts a unique structural design, which utilizes its spring to meet the positioning of the rack and pinion. When the rack and pinion move, it will not affect its normal operation. The spring sheet is positioned by the positioning wall to ensure its stability in use. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the internal structure of the push rod actuator with enhanced static holding force according to the present invention; Figure 2 This is a partial installation diagram of the spring sheet in this utility model; Figure 3 This is a schematic diagram of the push rod actuator structure with enhanced static holding force in this utility model; Figure 4 This is a partial structural diagram of the rack in this utility model; Figure 5 This is a schematic diagram of the rack structure in this utility model. Detailed Implementation

[0015] The present invention will be further explained below with reference to the accompanying drawings and specific embodiments.

[0016] Example 1 The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0017] like Figures 1 to 4 The push rod actuator shown includes: a lower housing 1, a rack 2 and a spring plate 3. The lower housing 1 is provided with a groove for the rack 2 to move, and the rack 2 is movably disposed in the groove of the lower housing 1. The lower housing 1 is provided with a positioning wall 4 on the outside of the rack 2. The spring plate 3 is provided with a positioning part 301 on the other side of the positioning wall 4. The rack 2 is provided with a groove 21 on the side of the positioning wall 4 that cooperates with the positioning part 301. During operation, the power source drives the rack 2 to move. When the rack 2 moves to the working stroke position, the positioning part 301 of the spring plate 3 enters the groove 21 on the side of the rack 2, thereby increasing its static holding force.

[0018] It should be noted that different specifications of spring sheets can be selected according to actual needs to achieve different levels of static holding force, as long as the actual needs are met.

[0019] like Figure 2 The spring sheet 3 shown includes a first spring sheet body 31 and a second spring sheet body 32. The second spring sheet body 32 is inclined and disposed on one side of the first spring sheet body 31, with one end connected to the first spring sheet body 31 and the other end connected to the positioning part 301.

[0020] The lower housing 1 has a gap on the outer side of the positioning wall 4 to accommodate the spring sheet 3. The spring sheet 3 is fitted into the gap. The first spring sheet body 31 and the second spring sheet body 32 are located on both sides of the positioning wall 4. The gap cooperates with the spring sheet 3. The gap and the structure of the spring sheet 3 cooperate to provide a good limiting effect, prevent the spring sheet from shifting, and thus improve its stability in use.

[0021] The positioning part 301 is V-shaped and cooperates with the slot 21. The V-shaped positioning part can be locked in the slot 21 and kept statically in place when the rack does not need to move, without affecting the normal operation of the rack.

[0022] Example 2 The push rod actuator with enhanced static holding force described in this embodiment has the same structure as that in Embodiment 1. In addition, this embodiment also includes a drive mechanism 5, a drive gear set 6, and an upper housing 7. The drive mechanism 5 is located in the mounting cavity of the lower housing 1, and its output end is provided with a drive shaft. The drive gear set 6 is connected to the drive shaft and meshes with the rack 2. The upper housing 7 and the lower housing 1 are arranged vertically opposite each other and connected by a connector, and cooperate with each other. Microswitches 8 are located on both sides of the drive mechanism 5. The rack 2 has an opening slot and a closing slot on the side away from the spring plate 3, both of which engage with the corresponding microswitches 8. During operation, when the drive mechanism 5 drives the drive gear set 6 to rotate, the drive gear set 6 moves the drive rack 2 forward, pushing the corresponding door open. The microswitches 8 engage in the opening slots on the rack 2, and the positioning part 301 of the spring plate 3 engages in the slot 21, maintaining a static holding force. When closing the door, when the drive mechanism 5 drives the drive gear set 6 to rotate in the opposite direction, the drive gear set 6 moves the drive rack 2 backward. The positioning part 301 of the spring plate 3 disengages from the slot 21, and the spring head rests against the side of the rack, experiencing sliding friction. This does not affect the rack's return to its initial position until the microswitches 8 engage in the closing slots on the rack 2.

[0023] The lower housing 1 is provided with a platform 11 for facilitating the movement of the rack 2, with an opening on one side, and a limiting groove 12 is provided on the lower housing 1.

[0024] A limiting block 22 is provided below the rack 2. The limiting block 22 cooperates with the limiting groove 12 on the lower housing 1. When the rack 2 moves a certain distance, the limiting block 22 moves to the end of the limiting groove 12 and is stuck by the end of the limiting groove 12, preventing the rack 2 from moving forward.

[0025] The lower housing 1 has a set of limiting posts 9 located at one end of the opening, with the limiting posts 9 positioned on both sides of the rack 2. The limiting posts 9 can restrict the running trajectory of the rack 2 to a certain extent, preventing it from deviating during operation.

[0026] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements can be made without departing from the principle of the present utility model, and these improvements should also be considered within the protection scope of the present utility model.

Claims

1. A push rod actuator with enhanced static holding force, characterized in that: include: The lower housing (1), rack (2) and spring plate (3) are provided. The lower housing (1) is provided with a groove for the rack (2) to move. The rack (2) is movably disposed in the groove of the lower housing (1). The lower housing (1) is provided with a positioning wall (4) on the outside of the rack (2). The spring plate (3) is provided with a positioning part (301) on one side of the positioning wall (4) and a positioning part (301) on the other side. The rack (2) is provided with a slot (21) that cooperates with the positioning part (301) on one side of the positioning wall (4). When working, the power source drives the rack (2) to move. When the rack (2) moves to the working stroke position, the positioning part (301) of the spring plate (3) enters the slot (21) on the side of the rack (2), thereby increasing its static holding force.

2. The push rod actuator with enhanced static holding force according to claim 1, characterized in that: The spring sheet (3) includes a first spring sheet body (31) and a second spring sheet body (32). The second spring sheet body (32) is inclined and disposed on one side of the first spring sheet body (31), with one end connected to the first spring sheet body (31) and the other end connected to the positioning part (301).

3. The push rod actuator with enhanced static holding force according to claim 1, characterized in that: The lower housing (1) is provided with a gap for accommodating the spring sheet (3) on the outside of the positioning wall (4). The spring sheet (3) is stuck in the gap. The first spring sheet body (31) and the second spring sheet body (32) are located on both sides of the positioning wall (4). The gap is in cooperation with the spring sheet (3).

4. The push rod actuator with enhanced static holding force according to claim 1, characterized in that: The positioning part (301) is V-shaped and cooperates with the slot (21).

5. The push rod actuator with enhanced static holding force according to claim 1, characterized in that: It also includes a drive mechanism (5), a drive gear set (6) and an upper housing (7). The drive mechanism (5) is located in the mounting cavity of the lower housing (1) and has a drive shaft at its output end. The drive gear set (6) is connected to the drive shaft and meshes with the rack (2). The upper housing (7) and the lower housing (1) are arranged opposite each other and connected by a connector, and cooperate with each other. Microswitches (8) are provided on both sides of the drive mechanism (5). The rack (2) is provided with an opening direction slot and a closing direction slot on the side away from the spring plate (3). The opening direction slot and the closing direction slot are both matched with the corresponding microswitches (8).

6. The push rod actuator with enhanced static holding force according to claim 5, characterized in that: The lower housing (1) is provided with a platform (11) for facilitating the movement of the rack (2), with an opening on one side, and a limiting groove (12) is provided on the lower housing (1).

7. The push rod actuator with enhanced static holding force according to claim 6, characterized in that: A limiting block (22) is provided below the rack (2). The limiting block (22) cooperates with the limiting groove (12) on the lower housing (1). When the rack (2) moves a certain distance, the limiting block (22) moves to the end of the limiting groove (12). The limiting block (22) is stuck by the end of the limiting groove (12), preventing the rack (2) from moving forward.

8. The push rod actuator with enhanced static holding force according to claim 6, characterized in that: The lower housing (1) is provided with a set of limiting posts (9) at one end of the opening, and the limiting posts (9) are located on both sides of the rack (2).

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