Push rod actuator with large static holding force
By using static maintenance components in the pushing rod actuator, and adjusting the contact surface of the upper wedge and the lower wedge block, the problem that the push rod actuator in the existing technology cannot maintain the static position when the power is broken. Large static maintenance and avoid continuous power maintenance.
Patent Information
- Application Number
- CN202411666675.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-21
- Publication Date
- 2025-01-28
AI Technical Summary
The existing push rod actuators cannot effectively maintain a static position in the event of power outage, resulting in a continuous power-on to maintain the door closed.
The simple mechanical structure, including static maintenance components, regulates the static maintenance by regulating the contact surface of the upper wedge and the lower wedge block to achieve greater static maintenance.
It can still maintain a large static position in the case of power off, avoiding the problem of continuous power and maintenance. The operation is simple, the cost is low, and it is easy to install and adjust.
Smart Images
Figure CN119373389A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of push rod actuators, and in particular to a push rod actuator with greater static holding force. Background Art
[0002] At present, high-end home appliances are developing towards intelligence, centralization, cabinetization, and integration. After applying various automatic door opening and closing actuators, door handles are gradually eliminated to make home appliances more beautiful. In many home appliance cases, a push rod actuator is used to push the door to a certain stroke position. The weight of the door and the internal spring of the hinge will generate a large closing force. At this time, when the actuator is powered off, it needs to stay for a few seconds to give the human hand a certain amount of time to manually open the door. During the few seconds of staying, the actuator itself must have a certain static holding force. When the self-locking force of the reduction motor itself is not enough, a push rod actuator with a large static holding force is required to avoid the need for continuous power supply to maintain. Summary of the invention
[0003] The purpose of the present invention is to provide a push rod actuator with a large static holding force to solve the above-mentioned problems, adopt a simple mechanical structure to achieve a large static holding force, and has the advantages of simple operation, low cost, easy installation, flexibility and convenience, and the position of the static holding force component can be selected according to the situation to avoid the disadvantage of continuous power-on maintenance.
[0004] Technical solution: The present invention provides a push rod actuator with a large static holding force, including: a housing, a reduction motor, a rack, and a static holding force component. The housing is L-shaped and is divided into an upper cover and a lower cover. One side of the housing is a driving area, and the other side is a travel area. The middle intersection is a matching output area, and the matching output area is provided with an opening on the outside of the travel area; the reduction motor is arranged in the driving area, and the output end is connected to the driving shaft, and the driving shaft enters the matching output area, and a gear set is provided on the driving shaft; the rack is arranged in the travel area, and one end extends out from the opening. The rack includes a tooth end and a buffer end, and a lower wedge is provided at the outermost end of the tooth end; the static holding force component includes an adjustment component and an upper wedge, which is arranged above the travel area of the upper cover of the adjustment component, and the upper wedge is arranged below the upper cover and connected to the adjustment component. The holding force is adjusted by the static holding force component using the adjustment component to adjust the position of the upper wedge, thereby controlling the contact area between the upper wedge and the lower wedge, thereby adjusting the upper limit of the static holding force.
[0005] Furthermore, in the above-mentioned push rod actuator with a large static holding force, the adjustment component includes: a fixed plate, a connecting column, a spring, and an insert block. The fixed plate is a plate-like structure with a downwardly protruding middle part, and its protruding part matches the size of the mounting groove 111. The fixed plate is installed on the mounting groove. The connecting column passes through the fixed plate and the upper cover and is fixedly connected to the upper wedge block. A cap is provided on the upper end of the connecting column. The spring surrounds the outer side of the connecting column. The insert block is inserted into the middle part of the fixed plate and is stuck under the cap of the connecting column to pull up the connecting column, thereby lifting the upper wedge block below. The upper wedge block and the lower wedge block are both inclined structures, the higher part is a steep slope surface, and the remaining part is a gentle slope surface. When the adjustment component adjusts the upper wedge block, the upper wedge block and the lower wedge block pass through the gentle slope surface, which facilitates the lower wedge block to pass over the upper wedge block. When the adjustment component adjusts the upper wedge block, the upper wedge block is under the action of the spring, and the upper wedge block and the lower wedge block steep slope surface are connected, so that the lower wedge block cannot be easily retreated, thereby achieving a large static holding force.
[0006] Furthermore, in the above-mentioned push rod actuator with large static holding force, the upper cover is designed with an external structure that conforms to the reduction motor in the driving area.
[0007] Furthermore, in the above-mentioned push rod actuator with greater static holding force, the tooth end is connected in cooperation with the gear set, and the buffer end is arranged through the outer opening of the cooperation output area.
[0008] Furthermore, the above-mentioned push rod actuator with a large static holding force has a notch on one side of the drive shaft at the connection between the tooth end and the buffer end and the tooth end, two of which are provided on the tooth end and one on the buffer end. The notch strokes are different, and the stroke can be set according to the door opening angle required by the product, and has strong applicability.
[0009] Furthermore, in the above-mentioned push rod actuator with greater static holding force, a buffer sleeve is provided on the outer side of the buffer end, and a locking structure is provided on the buffer sleeve.
[0010] Furthermore, in the above-mentioned push rod actuator with large static holding force, micro switches are symmetrically arranged on both sides of the driving shaft, and the rollers below the micro switches cooperate with the notches.
[0011] Furthermore, in the above-mentioned push rod actuator with greater static holding force, the matching output area is provided with limiting rollers on both sides of the opening.
[0012] Furthermore, in the above-mentioned push rod actuator with greater static holding force, the upper cover is provided with two mounting grooves above the travel area.
[0013] Furthermore, in the above-mentioned push rod actuator with a large static holding force, the number of the static holding force components is consistent with the number of installation slots, and the upper caps on the inner connecting column are provided with card slots on both sides. The plug blocks are respectively stuck under the first connecting column cap and the second connecting column cap card slot from the outside to the inside, so that the height position of the upper wedge blocks in the two static holding force components is high on the outside and low on the inside, respectively providing two states of smaller and larger static holding forces. Multiple stroke specifications can be achieved on a push rod actuator, and the installation position for providing static holding force can be selected according to the situation, avoiding the need to manually disassemble the product for position adjustment. The static holding force of the push rod actuator can be changed by simply pulling out the plug blocks.
[0014] It can be seen from the above technical scheme that the present invention has the following beneficial effects: a push rod actuator with a large static holding force described in the present invention adopts a mechanical structure of a static holding force component, and the static holding force is adjusted by adjusting the contact surface between the upper wedge block and the lower wedge block. The operation is simple, the cost is low, and the installation is convenient and flexible. The static holding force component can flexibly adjust the installation position according to the needs of the product, and a variety of stroke specifications can be achieved on one push rod actuator, avoiding manual disassembly of the product for position adjustment and avoiding the problem of continuous power-on maintenance of the push rod actuator. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 A schematic diagram of a push rod actuator with a large static holding force according to the present invention; Figure 2 This is a schematic diagram of the interior of the push rod actuator of the present invention; Figure 3 It is a schematic diagram of the rack structure of the present invention; Figure 4 It is a schematic diagram of the upper cover of the present invention; Figure 5 It is a schematic diagram of the structure of the static retaining force component of the present invention.
[0016] In the figure: housing 1, reduction motor 2, rack 3, static holding force component 4, micro switch 5, limit roller 6, upper cover 11, lower cover 12, drive area 121, travel area 122, matching output area 123, drive shaft 21, gear set 211, tooth end 31, buffer end 32, lower wedge block 311, adjustment component 41, upper wedge block 42, notch 312, buffer sleeve 321, locking structure 322, installation slot 111, fixing plate 411, connecting column 412, spring 413, plug block 414. DETAILED DESCRIPTION
[0017] Example 1 like Figure 1-4The push rod actuator with a large static holding force shown in the figure comprises: a housing 1, a reduction motor 2, a rack 3, and a static holding force component 4. The housing 1 is L-shaped and is divided into an upper cover 11 and a lower cover 12. One side of the housing 1 is a driving area 121, and the other side is a travel area 122. The middle intersection is a matching output area 123. The matching output area 123 is provided with an opening facing the outer side of the travel area 122; the reduction motor 2 is arranged in the driving area 121, and the output end is connected to the driving shaft 21. The shaft 21 enters the matching output area 123, and a gear set 211 is provided on the driving shaft 21; the rack 3 is arranged in the travel area 122, and one end extends out from the opening, and the rack 3 includes a tooth end 31 and a buffer end 32. The outermost end of the tooth end 31 is provided with a lower wedge 311; the static holding force component 4 includes: an adjustment component 41, and an upper wedge 42, which is arranged above the travel area 122 of the upper cover 11 of the adjustment component 41, and the upper wedge 42 is arranged below the upper cover 11 and connected to the adjustment component 41. The holding force is adjusted by the static holding force component 4 using the adjustment component 41 to adjust the position of the upper wedge 42, thereby controlling the contact area between the upper wedge 42 and the lower wedge 311, thereby adjusting the upper limit of the static holding force.
[0018] like Figure 3 In the push rod actuator shown in the figure, which has a relatively large static holding force, the upper cover 11 is designed with an outer structure in the driving area 121 that conforms to the outer shape of the reduction motor 2 .
[0019] like Figure 2 A push rod actuator with a large static holding force is shown, wherein the tooth end 31 is connected to the gear set 211, and the buffer end 32 is arranged through the outer opening of the matching output area 123; a notch 312 is provided on the side of the drive shaft 21 at the connection between the tooth end 31 and the buffer end 32 and the tooth end 31, and two are provided on the tooth end 31, and one is provided on the buffer end 32. The notch 312 has different strokes, and the stroke can be set according to the door opening angle required by the product, and has strong applicability.
[0020] In this embodiment, micro switches 5 are symmetrically arranged on both sides of the driving shaft 21 , and the rollers below the micro switches 5 cooperate with the notches 312 .
[0021] Example 2 On the basis of Example 1, in this example, Figure 2 In the push rod actuator with a relatively large static holding force shown in the figure, a buffer sleeve 321 is provided on the outer side of the buffer end 32 , and a locking structure 322 is provided on the buffer sleeve 321 .
[0022] In this embodiment, the matching output area 123 is provided with limiting rollers 6 on both sides of the opening, and the spacing between the limiting rollers 6 is equal to the width of the rack 3 to ensure the stability of the movement of the rack 3.
[0023] like Figure 3 In the push rod actuator shown in the figure with a large static holding force, the upper cover 11 is provided with two mounting grooves 111 above the stroke area 122 .
[0024] like Figure 4 A push rod actuator with a large static holding force is shown, and the adjustment component 41 includes: a fixed plate 411, a connecting column 412, a spring 413, and an insert block 414. The fixed plate 411 is a plate-like structure with a downwardly protruding middle part, and its protruding part matches the size of the mounting groove 111. The fixed plate 411 is installed on the mounting groove 111. The connecting column 412 passes through the fixed plate 411 and the upper cover 11 and is fixedly connected to the upper wedge block 42. A cap is provided on the upper end of the connecting column 412. The spring 413 surrounds the outer side of the connecting column 412. The insert block 414 is inserted into the middle part of the fixed plate 411 and is stuck under the cap of the connecting column 412 to pull up the connecting column 412, thereby lifting the upper wedge block 42 below; the upper wedge block 42 and the lower wedge block 311 are both inclined structures, the higher part is a steep slope, and the remaining part is a gentle slope. When the adjusting component 41 adjusts the upper wedge block 42, the upper wedge block 42 and the lower wedge block 311 are in contact through a gently sloping surface, which facilitates the lower wedge block 311 to pass over the upper wedge block 42. When the adjusting component 41 adjusts the upper wedge block 42, the upper wedge block 42 and the lower wedge block 311 are in contact at a steep slope under the action of the spring 413, so that the lower wedge block 311 cannot be easily retreated, thereby achieving a larger static holding force.
[0025] In this embodiment, the number of static retaining force components 4 is consistent with the number of installation slots 111, and slots are provided on both sides of the cap above the inner connecting column 412. The plug block 414 is respectively stuck under the cap of the first connecting column 412 and under the slot of the cap of the second connecting column 412 from the outside to the inside, so that the height position of the upper wedge block 42 in the two static retaining force components 4 is high on the outside and low on the inside, respectively providing two states of smaller and larger static retaining force. Multiple stroke specifications can be achieved on a push rod actuator, and the installation position for providing static retaining force can be selected according to the situation, avoiding the need to manually disassemble the product for position adjustment. The static retaining force of the push rod actuator can be changed by only pulling out the plug block 414.
[0026] It should be noted that the above is only a technical solution of the invention and not a limitation. Although the present invention is described in detail with reference to the preferred embodiments, a person skilled in the art should understand that the technical solution of the invention can be modified or replaced by equivalents without departing from the scope of the technical solution of the present invention, which should be included in the scope of the claims of the present invention.
Claims
1. A push rod actuator with a large static holding force, characterized in that: include: A shell (1), the shell (1) is L-shaped and is divided into an upper cover (11) and a lower cover (12); one side of the shell (1) is a driving area (121), the other side is a travel area (122), and the middle intersection is a matching output area (123); the matching output area (123) is provided with an opening on the outer side of the travel area (122); A reduction motor (2), the reduction motor (2) being arranged in a driving area (121), the output end of which is connected to a driving shaft (21), the driving shaft (21) entering a matching output area (123), and a gear set (211) being arranged on the driving shaft (21); A rack (3), wherein the rack (3) is arranged in the travel area (122), one end of which protrudes from the opening, the rack (3) comprises a tooth end (31) and a buffer end (32), and a lower wedge block (311) is provided at the outermost end of the tooth end (31); A static retaining force assembly (4), the static retaining force assembly (4) comprising: an adjusting assembly (41), an upper wedge block (42), the upper wedge block (42) being arranged above a travel area (122) of an upper cover (11) of the adjusting assembly (41), and the upper wedge block (42) being arranged below the upper cover (11) and connected to the adjusting assembly (41); The adjustment component (41) comprises: a fixed plate (411), a connecting column (412), a spring (413), and an insert block (414). The fixed plate (411) is a plate-like structure with a middle portion protruding downward, and is arranged above the upper cover (11). The connecting column (412) passes through the fixed plate (411) and the upper cover (11) and is fixedly connected to the upper wedge block (42). A cap is provided at the upper end of the connecting column (412). The spring (413) surrounds the outer side of the connecting column (412). The insert block (414) is inserted into the middle portion of the fixed plate (411) and is stuck under the cap of the connecting column (412), so as to pull up the connecting column (412) and thereby lift the upper wedge block (42) below.
2. A push rod actuator with a large static holding force according to claim 1, characterized in that: The upper cover (11) is designed with an external structure in the driving area (121) that conforms to the outer shape of the reduction motor (2).
3. The push rod actuator with large static holding force according to claim 1, characterized in that: The tooth end (31) is connected in cooperation with the gear set (211), and the buffer end (32) is arranged through the outer opening of the cooperation output area (123).
4. A push rod actuator with a large static holding force according to claim 3, characterized in that: A notch (312) is provided at the connection between the tooth end (31) and the buffer end (32) and the tooth end (31) on one side of the drive shaft (21), two notches are provided on the tooth end (31) and one notch is provided on the buffer end (32), and the notch (312) has different strokes, which are determined according to the product door opening angle.
5. The push rod actuator with large static holding force according to claim 1, characterized in that: A buffer sleeve (321) is provided on the outside of the buffer end (32), and a locking structure (322) is provided on the buffer sleeve (321).
6. The push rod actuator with large static holding force according to claim 1, characterized in that: Micro switches (5) are symmetrically arranged on both sides of the driving shaft (21), and the rollers below the micro switches (5) cooperate with the notches (312).
7. The push rod actuator with large static holding force according to claim 1, characterized in that: The matching output area (123) is provided with limiting rollers (6) on both sides of the opening.
8. The push rod actuator with large static holding force according to claim 1, characterized in that: The upper cover (11) is provided with two mounting grooves (111) above the travel area (122) for mounting the fixing plate (411), and the size of the mounting grooves (111) matches the protruding portion of the fixing plate (411).
9. The push rod actuator with large static holding force according to claim 1, characterized in that: The upper wedge block (42) and the lower wedge block (311) are both inclined surface structures, the higher part is a steep slope surface, and the remaining part is a gentle slope surface.
10. The push rod actuator with a large static holding force according to claim 8, characterized in that: The number of the static retaining force components (4) is consistent with the number of the mounting slots (111), and slots are provided on both sides of the cap above the inner connecting column (412). The insert block (414) is respectively stuck under the cap of the first connecting column (412) and under the slot of the cap of the second connecting column (412) from the outside to the inside, so that the height positions of the upper wedge blocks (42) in the two static retaining force components (4) are higher on the outside and lower on the inside, respectively providing two states of smaller and larger static retaining forces.