Push-pull actuator

Abstract

The present application provides a push-pull actuator, comprising a driving assembly, wherein the driving assembly is provided with an output end, and a movement direction of the output end is a driving direction; a cable assembly, wherein the cable assembly comprises a sleeve and a transmission member, the transmission member is configured to be adapted to be movably connected to the sleeve in the driving direction, and the output end is drivingly connected to the transmission member; and a position feedback assembly, wherein the position feedback assembly comprises a linear sliding potentiometer, the linear sliding potentiometer is provided with a slider, the slider is configured to be adapted to move on the linear sliding potentiometer in the driving direction, the movement travel of the slider on the linear sliding potentiometer matches the movement travel of the transmission member on the sleeve, and the slider is connected to the transmission member and / or the output end.

Description

A push-pull actuator

[0001] Cross-reference to related applications

[0002] This application is based on and claims priority to Chinese patent application No. 202421996790.9, filed on August 16, 2024, the disclosure of which is incorporated herein in its entirety. TECHNICAL FIELD

[0003] The present application relates to the technical field of push-pull actuators, and in particular to a push-pull actuator capable of position feedback. BACKGROUND

[0004] There are various types of cable actuators on the current automobile market, which are devices that allow remote release of any latch in the vehicle. After receiving a control signal, the cable actuator converts electrical power into mechanical power, pulls the cable, and drives the unlocking mechanism. It can be used to achieve the unlocking function of central armrest, fuel tank cover, door lock, charging port, headrest, etc. Depending on the situation, it can be selected whether the structure needs to have a self-recovery function.

[0005] In the prior art, a soft steel wire cable is usually used to pull the load to achieve the unlocking function. Only the pulling unlocking function can be achieved, and multiple positions cannot be identified. If the motor Hall memory function is used to provide real-time feedback on different positions during the pushing and pulling process, the motor Hall memory function is prone to inaccurate positioning due to accumulated tolerances.

[0006] Therefore, the existing push-pull actuator cannot accurately and in real time feedback the different positions during the pushing and pulling process, and there is an urgent need for a solution to this problem. SUMMARY

[0007] The present application aims to provide a push-pull actuator that can overcome at least one of the deficiencies in the prior art, thereby particularly enabling accurate and real-time feedback on different positions during the pushing and pulling process.

[0008] According to the present application, a push-pull actuator is provided, comprising:

[0009] a drive assembly, the drive assembly being provided with an output end, the active direction of the output end being a driving direction;

[0010] a cable assembly, the cable assembly comprising a sleeve and a transmission member, the transmission member being adapted to be movably connected to the sleeve in the driving direction, the output end being drivingly connected to the transmission member;

[0011] A position feedback assembly comprises a straight sliding potentiometer, a slider is arranged on the straight sliding potentiometer, the slider is arranged to move on the straight sliding potentiometer in a driving direction, a moving stroke of the slider on the straight sliding potentiometer matches a moving stroke of the transmission member on the sleeve in the driving direction, and the slider is connected to the transmission member and / or the output end.

[0012] Preferably, the position feedback assembly comprises a support member, the support member supports the driving assembly, the sleeve and the straight sliding potentiometer respectively.

[0013] Preferably, the slider is connected between the transmission member and the output end.

[0014] Preferably, the push-pull actuator further comprises:

[0015] An adapter is connected between the output end, the transmission member and the slider, and the adapter and the straight sliding potentiometer are hidden inside the support member.

[0016] Preferably, the output end, the transmission member and the slider are detachably connected to the adapter.

[0017] Preferably, the adapter is a cylindrical adapter, an axis direction of the adapter coincides with the driving direction, an installation groove is formed on one side of the adapter in a radial direction, the installation groove is communicated between two sides in the axis direction of the adapter, a profiled groove is formed on one side of an inner wall of the installation groove in the driving direction, a limiting groove is formed on the other side of the inner wall of the installation groove in the driving direction, and a terminal groove is formed on an outer wall of the adapter in the radial direction.

[0018] One end of the transmission member connected to the output end extends in a radial direction to form a die-casting head, the die-casting head matches the profiled groove, the output end matches the limiting groove, and the terminal groove matches the slider.

[0019] Preferably, in the radial direction of the adapter, a size of the installation groove is not less than a size of the transmission member.

[0020] Preferably, a support cavity is arranged in the support member, a support port is formed on one side of the support member perpendicular to the driving direction to communicate between the inside and outside of the support cavity, a driving groove and a cable groove are respectively formed on two side edges of the support port in the driving direction, a housing is arranged on the driving assembly, the output end is located on the housing, the housing is interference-connected to the driving groove, and the cable groove is interference-connected to the sleeve.

[0021] Preferably, a cylindrical groove is formed in the radial outer wall of the sleeve, the cylindrical groove is arranged close to the driving assembly, and the inner wall of the cylindrical groove is connected with the inner wall of the cable groove in an interference fit.

[0022] Preferably, the bottom wall of the support cavity is connected with the straight sliding potentiometer, in particular through a snap fit. Preferably, the snap fit is divided into multiple groups, and the snap fits in adjacent groups are arranged in sequence in the driving direction. Preferably, the number of the snap fits in each group is multiple, and the snap fits in each group are arranged in a direction perpendicular to the driving direction.

[0023] Preferably, the driving assembly comprises:

[0024] a housing, the inside of the housing is provided with a power source;

[0025] a lead screw, the lead screw is provided with a transmission unit, the transmission unit is connected with the power source, and the power source can drive the lead screw to rotate through the transmission unit;

[0026] a nut, one end of the nut is threadedly sleeved on the lead screw, the nut can move horizontally reciprocating along the axial direction of the lead screw, and the other end of the nut is the output end;

[0027] a power supply opening is formed in the housing, and a power supply wire harness connected with the power source is arranged to be suitable for entering and exiting the housing through the power supply opening.

[0028] Preferably, an output opening is formed in the support member, and the wire harness on the straight sliding potentiometer is arranged to be suitable for entering and exiting the support member through the output opening.

[0029] Preferably, the power supply opening and the output opening are located on the same side in a direction perpendicular to the driving direction.

[0030] Preferably, the driving assembly further comprises:

[0031] an automatic return unit, the automatic return unit is arranged at one end of the lead screw away from the nut, and the automatic return unit can drive the lead screw to rotate automatically and drive the nut to move to reset when the power source is in action or inaction. Preferably, the transmission member is a rigid member, in particular, the rigid member is bendable.

[0032] Compared with the prior art, the present application can have the beneficial effects that:

[0033] According to the push-pull actuator of the present application, the existing flexible cable can be replaced by a cable with certain rigidity, and the unlocking of both push and pull can be realized. The output end of the driving assembly can drive the transmission member with certain rigidity or rigidity member to move in the sleeve. The straight sliding potentiometer connected to the transmission member and / or the output end, for example, between the transmission member and the output end, can feedback the different positions of the output structure in real time, and the problem of inaccurate position caused by accumulated tolerance of the traditional motor Hall memory function can be avoided.

[0034] The technical features mentioned above, the technical features to be mentioned below, and the technical features shown in the drawings alone can be combined with each other arbitrarily, as long as the combined technical features are not contradictory to each other. All feasible feature combinations are the technical contents explicitly described herein. Any one of the multiple sub-features contained in the same sentence can be applied independently, and does not have to be applied together with other sub-features.

[0035] The present application will be further described below in combination with the drawings and embodiments. BRIEF DESCRIPTION OF DRAWINGS

[0036] Fig. 1 is an exploded schematic view of a push-pull actuator according to the present application;

[0037] Fig. 2 is a schematic view of a driving assembly of a push-pull actuator according to the present application;

[0038] Fig. 3 is a schematic view of a cable assembly of a push-pull actuator according to the present application;

[0039] Fig. 4 is a schematic view of a support of a push-pull actuator according to the present application;

[0040] Fig. 5 is a schematic view of the connection between the support and the straight sliding potentiometer of a push-pull actuator according to the present application;

[0041] Fig. 6 is a schematic view of a straight sliding potentiometer of a push-pull actuator according to the present application;

[0042] Fig. 7 is a schematic view of one perspective view of an adapter of a push-pull actuator according to the present application;

[0043] Fig. 8 is a schematic view of another perspective view of an adapter of a push-pull actuator according to the present application;

[0044] Fig. 9 is a schematic view of the assembly mode of a push-pull actuator according to the present application;

[0045] Fig. 10 is a schematic view of the maximum stroke state of a cable assembly of a push-pull actuator according to the present application;

[0046] Fig. 11 is a schematic view of the maximum stroke state of a cable assembly of a push-pull actuator according to the present application;

[0047] Fig. 12 is a schematic view of the arrangement of the power supply opening and the output opening of a push-pull actuator according to the present application.

[0048] In the drawings: 100, drive assembly; 100a, output end; 101, housing; 1011, power supply opening; 102, power source; 103, screw rod; 104, transmission unit; 105, nut; 200, cable assembly; 201, sleeve; 2011, barrel groove; 202, transmission member; 2021, die head; 300, feedback assembly; 301, support member; 3011, support cavity; 3012, support opening; 3013, drive groove; 3014, cable groove; 3015, output opening; 302, straight sliding potentiometer; 3021, sliding block; 3022, buckle; 400, adapter; 401, mounting groove; 4011, profiling groove; 4012, limiting groove; 402, terminal groove. DETAILED DESCRIPTION

[0049] The following description is made for the purpose of illustrating the present application in detail so that it can be understood by those skilled in the art. The preferred embodiments in the following description are only examples and other obvious modifications can be made by those skilled in the art. The essential principles of the present application defined in the following description can be applied to other embodiments, modifications, improvements, equivalents and other technical solutions without departing from the spirit and scope of the present application.

[0050] Referring to Figs. 1-8, the embodiment of the present application provides a push-pull actuator, comprising:

[0051] a drive assembly 100, wherein an output end 100a is arranged on the drive assembly 100, and the active direction of the output end 100a is a driving direction;

[0052] a cable assembly 200, wherein the cable assembly 200 comprises a sleeve 201 and a transmission member 202, the transmission member 202 is arranged to be movably connected to the sleeve 201 in the driving direction, and the output end 100a is drivingly connected to the transmission member 202;

[0053] A position feedback assembly 300 can include a support 301 for supporting the drive assembly 100, the sleeve 201 and a straight slide potentiometer 302, respectively, and a slider 3021 provided on the straight slide potentiometer 302 and adapted to move on the straight slide potentiometer 302 in the driving direction. The slider 3021 can be connected to the transmission member 202 and / or the output end 100a. For example, the slider 3021 can be connected between the transmission member 202 and the output end 100a. In some embodiments, the slider 3021 can also be connected to the transmission member 202 or to the output end 100a.

[0054] The push-pull actuator replaces the flexible cable of the prior art with a transmission member having a certain rigidity, which can be referred to as rigid member herein for the sake of distinction from the flexible cable of the prior art, and is capable of achieving unlocking in both the pushing and pulling cases. The transmission member 202 is driven to move in the sleeve 201 by the output end 100a of the drive assembly 100. The straight slide potentiometer 302 located between the transmission member 202 and the output end 100a is capable of real-time feedback of various positions of the output structure, which can avoid the problem of inaccurate position caused by cumulative tolerance of the memory function of the Hall of the conventional motor, and also avoid the external installation of the travel switch.

[0055] The push-pull actuator of the present application can replace the flexible cable of the prior art and achieve the pulling function. Unlike the flexible cable of the prior art, the transmission member has a certain rigidity, and the push-pull actuator of the present application can also achieve the pushing function. Advantageously, although having a certain rigidity, the transmission member 202 or rigid member (and the sleeve 201) is particularly bendable. Thus, the push-pull actuator, particularly the cable assembly 200, can have diversified installation modes and application scenarios.

[0056] In some embodiments, the transmission member 202 or rigid member can be configured as a steel wire. In some embodiments, in order to obtain the desired rigidity of the transmission member 202 or rigid member and maintain its bendability if necessary, the transmission member 202 or rigid member can have a radial dimension, such as a diameter, of 1 mm to 3 mm, preferably 1 mm to 2 mm. Advantageously, the transmission member 202 or rigid member can have a diameter of 1.1 mm to 1.3 mm, such as 1.2 mm. By selectively choosing the radial dimension of the transmission member 202 or rigid member, the desired pushing and pulling functions can be achieved by means of the transmission member 202.

[0057] It should be noted that the straight sliding potentiometer 302 is a prior art, and the slider 3021 outputs different electrical signals, such as voltage and / or current, at different positions of the straight sliding potentiometer 302, and the position of the transmission member 202 can be obtained by reading the electrical signal data. In the driving direction, the active stroke of the slider 3021 on the straight sliding potentiometer 302 matches the active stroke of the transmission member 202 on the sleeve 201. Specifically, referring to FIGS. 10 and 11, the cable assembly 200 can have at least two working states, namely, a maximum push stroke state and a maximum pull stroke state. When the cable assembly 200 is in the maximum push stroke state, the side of the transmission member 202 close to the output end 100a can be close to the side of the sleeve 201 close to the output end 100a, and at this time, the slider 3021 can be located on the side of the straight sliding potentiometer 302 away from the driving assembly 100, for example, as shown in FIG. 10. When the cable assembly 200 is in the maximum pull stroke state, the side of the transmission member 202 close to the output end 100a can be away from the side of the sleeve 201 close to the output end 100a, and at this time, the slider 3021 can be located on the side of the straight sliding potentiometer 302 close to the driving assembly 100, for example, as shown in FIG. 11.

[0058] Referring to FIG. 3, regarding the specific structure of the cable assembly 200, in some embodiments, the transmission member 202 can be a cylindrical rigid steel wire. The transmission member 202 can be movably connected to the inside of the sleeve 201. In use, the transmission member 202 can output a pushing force and also apply a pulling force, realizing bidirectional load work. One end of the transmission member 202 in the length direction can be connected to the output end 100a of the driving assembly 100, and the other end of the transmission member 202 in the length direction can be connected to an external framework, for example.

[0059] Referring to FIGS. 7 and 8, further, in some embodiments, the push-pull actuator can further include an adapter 400. The output end 100a, the transmission member 202, and the slider 3021 can be connected through the adapter 400, and the adapter 400 and the straight sliding potentiometer 302 can be hidden inside the support 301. The adapter 400 simultaneously realizes the connection between the output end 100a, the transmission member 202, and the slider 3021 on the device, and realizes integrated installation in cooperation with the support 301, so that the overall volume of the actuator is small, and the increase of the overall occupied space of the actuator caused by externally adding a travel switch is avoided.

[0060] Further, in some embodiments, the output end 100a, the transmission member 202, and the slider 3021 can be detachably connected to the adapter 400, respectively.

[0061] Specifically, in some embodiments, referring to FIG. 7 and FIG. 8, the adapter 400 can be a cylindrical adapter 400, the axis direction of which coincides with the driving direction. One side of the adapter 400 in the radial direction can be provided with a mounting groove 401, which is in communication with both sides of the adapter 400 in the axis direction. The inner wall of the mounting groove 401 on one side in the driving direction can be provided with a profiled groove 4011, and the inner wall of the mounting groove 401 on the other side in the driving direction can be provided with a limiting groove 4012. One end of the transmission member 202 connected to the output end 100a can extend radially to form a die head 2021, which is matched with the profiled groove 4011. The output end 100a can be matched with the limiting groove 4012. Preferably, the profiled groove 4011 and the die head 2021 can be interference connected, and the output end 100a and the limiting groove 4012 can be interference connected. In use, the die head 2021 can be inserted into the profiled groove 4011 of the adapter 400 by size constraint, preventing radial disengagement, and can push the transmission member 202 in the driving direction, and the output end 100a can be inserted into the limiting groove 4012 of the adapter 400 by size constraint. Optionally, the die head 2021 can be cylindrical or spherical.

[0062] As shown in FIG. 8, the outer wall of the adapter 400 in the radial direction can be provided with a terminal groove 402, which is matched with the slider 3021. Preferably, the terminal groove 402 and the slider 3021 can be interference fitted. In an embodiment of the present application, the terminal groove 402 and the slider 3021 can both be rectangular.

[0063] Further, in some embodiments, in the radial direction of the adapter 400, the size of the mounting groove 401 is not less than the size of the transmission member 202. Preferably, in the radial direction of the adapter 400, the size of the mounting groove 401 is slightly larger than the size of the transmission member 202. In order to facilitate the installation of the transmission member 202 into the mounting groove 401, avoiding disengagement.

[0064] The exemplary connection structure between the support 301, the drive assembly 100, the sleeve 201 and the straight slide potentiometer 302 will be described in combination with FIG. 3-8. One side of the support 301 in the driving direction can be detachably connected with the drive assembly 100, and the other side of the support 301 in the driving direction can be detachably connected with the sleeve 201. Specifically, in some embodiments, referring to FIG. 4 and FIG. 5, a support cavity 3011 is arranged in the support 301, and a support port 3012 is formed on one side of the support 301 perpendicular to the driving direction to communicate the inside and outside of the support cavity 3011, so that the support 301 can be sleeved on the connection between the output end 100a and the cable assembly 200 in a manner perpendicular to the driving direction. The support port 3012 can be formed with a drive slot 3013 and a cable slot 3014 on the middle of the two side edges in the driving direction, respectively. The cross-sectional shape of the drive slot 3013 and the cable slot 3014 can be U-shaped, so that the drive slot 3013 and the cable slot 3014 communicate with the support port 3012. A housing 101 can be arranged on the drive assembly 100, and the output end 100a is located on the housing 101, and the housing 101 can be interference connected with the drive slot 3013. The cable slot 3014 can be interference connected with the side of the sleeve 201 close to the drive assembly 100.

[0065] Further, in some embodiments, as shown in FIG. 3, a cylindrical groove 2011 in the shape of a ring can be formed on the radial outer wall of the sleeve 201, and the cylindrical groove 2011 is arranged close to the drive assembly 100, and the inner wall of the cylindrical groove 2011 can be interference connected with the inner wall of the cable slot 3014. Further, in some embodiments, one cylindrical groove 2011 can be arranged on each of the two sides of the sleeve 201 in the axial direction. In combination with FIG. 3, it can be seen that the cross-sectional shape of the cylindrical groove 2011 on the sleeve 201 can be in the shape of an I-beam. In use, the sleeve 201 can be radially interference fitted with the support 301 and kept connected.

[0066] In order to facilitate installation, in the driving direction, the movable distance of the transmission member 202 in the sleeve can be greater than the movable distance of the transmission member 202 in the support cavity 3011.

[0067] Referring to FIG. 4 and FIG. 5, in some embodiments, the straight sliding potentiometer 302 can be detachably installed in the support cavity 3011. Specifically, the bottom wall of the support cavity 3011 opposite to the support opening 3012 and the straight sliding potentiometer 302 can be connected by the buckles 3022. The buckles 3022 can be divided into multiple groups, and adjacent groups of the buckles 3022 can be arranged in sequence in the driving direction. The number of the buckles 3022 in each group can be multiple, and the buckles 3022 in each group can be arranged on both sides of the straight sliding potentiometer 302 in a manner perpendicular to the driving direction. In an embodiment of the present application, the number of the buckles 3022 can be six, and the buckles 3022 are divided into three groups, which are arranged at equal intervals in the driving direction. Among them, the buckles 3022 in the middle group are arranged close to the center of the straight sliding potentiometer 302. The number of the buckles 3022 in each group can be two, and the buckles 3022 in each group can be distributed on both sides of the center of the straight sliding potentiometer 302. Or, the buckles 3022 in each group can be distributed on both sides of the moving axis of the slider 3021 of the straight sliding potentiometer 302. In use, the straight sliding potentiometer 302 can be fixedly connected with the support 301 through the buckles 3022, so that the straight sliding potentiometer 302 can be built-in in the support 301, achieving the effect of small volume and compact structure. It can be understood that, due to the bendability of the cable assembly 200, it is relatively difficult and low-precision to detect the position on the bending section of the cable assembly 200, especially on the bending section of the sleeve 201 (for example, through the straight sliding potentiometer 302). In contrast, the movement of the output end 100a and the transmission member 202 (and the adapter 400 if necessary) within the range of the support 301 can be basically, especially completely, along a straight line, which is advantageously matched with the working mode of the straight sliding potentiometer 302. By arranging the straight sliding potentiometer 302 in the support 301, the function of position detection can be reliably realized, especially the precision of position detection can be ensured.

[0068] Referring to FIG. 1, regarding the specific structure of the driving assembly 100, the driving assembly 100 can include:

[0069] a housing 101, an inside of the housing 101 can be installed with a power source 102;

[0070] a lead screw 103, the lead screw 103 can be provided with a transmission unit 104, the transmission unit 104 is connected with the power source 102, and the power source 102 can drive the lead screw 103 to rotate through the transmission unit 104;

[0071] A nut 105, one end of which can be threadedly sleeved on the lead screw 103, the nut 105 being capable of reciprocating horizontally along the axial direction of the lead screw 103, the other end of the nut 105 being the output end 100a.

[0072] Further, the driving assembly 100 can further include an automatic return unit arranged on the lead screw 103 away from the one end of the nut 105, the automatic return unit being capable of driving the lead screw 103 to automatically rotate and drive the nut 105 to move back when the power source 102 is in action or not in action.

[0073] In an embodiment of the present application, the automatic return unit can be a torsional spring, the torsional spring being capable of driving the lead screw 103 to automatically rotate and drive the nut 105 to move back when the power source 102 is not in action.

[0074] Optionally, in some embodiments, the power source 102 can be a motor capable of outputting a certain torque.

[0075] The housing 101 can include a box body and a box cover, the box body and the box cover being clamped to form a space for the transmission unit 104 to move. Preferably, the box body and the box cover can be connected through positioning buckles 1012 arranged in the circumferential direction.

[0076] It is to be noted that, in an embodiment of the present application, the structure of the driving assembly 100 is the same as that of a small electric unlocking actuator with self-return function disclosed in the Chinese application patent with the publication number CN215255392U, which is prior art and will not be described in detail here.

[0077] Referring to FIG. 12, a power supply opening 1011 can be formed on the housing 101, and a power supply wire harness connected to the power source 102 can be arranged to be adapted to pass in and out of the housing 101 through the power supply opening 1011. An output opening 3015 communicating the inside and the outside can be formed on the support 301, and a wire harness on the straight sliding potentiometer 302 can be arranged to be adapted to pass in and out of the support 301 through the output opening 3015. The power supply opening 1011 and the output opening 3015 can be located on the same side perpendicular to the driving direction, so as to facilitate wiring and later maintenance.

[0078] Referring to FIG. 9, an exemplary assembly method of the push-pull actuator according to an embodiment of the present application is as follows:

[0079] 1. The straight sliding potentiometer 302 is installed on the inner side of the support 301 through buckles 3022 on both sides;

[0080] 2. The die-casting head 2021 on the transmission member 202 is inserted into the profiling groove 4011 on the adapter 400, preventing the transmission member 202 from being radially pulled out of the adapter 400 and enabling the transmission member 202 to be pushed in the driving direction via the adapter 400;

[0081] 3. The output end 100a is inserted into the limiting groove 4012 on the adapter 400;

[0082] 4. The support member 301 is sleeved on the outside of the adapter 400 in a manner perpendicular to the driving direction via the support opening 3012 on the support member 301, wherein the slider 3021 is inserted into the terminal groove 402 on the adapter 400, the shell 101 is inserted into the driving groove 3013 on the support member 301, and the sleeve 201 is inserted into the cable groove 3014 on the support member 301, achieving the connection between the driving assembly 100, the cable assembly 200, and the position feedback assembly 300.

[0083] An exemplary use mode of the push-pull actuator according to an embodiment of the present application is as follows:

[0084] After the driving assembly 100 is powered on, the output end 100a pushes the transmission member 202 to move in the driving direction, and simultaneously pushes the slider 3021 on the straight sliding potentiometer 302 to move via the adapter 400, changing the resistance of the straight sliding potentiometer 302. This can cause, for example, the current of the straight sliding potentiometer 302 to change, obtaining the output displacement and the current curve, thereby realizing the feedback of the position change during the operation of the product.

[0085] After the driving assembly 100 is powered on in the reverse direction, the output end 100a on the driving assembly 100 moves in the reverse direction in the driving direction, driving the slider 3021 on the straight sliding potentiometer 302 to move in the reverse direction, obtaining the output displacement and the current curve. If an automatic return unit is arranged in the driving assembly 100, the output end 100a on the driving assembly 100 can be driven to move in the reverse direction in the driving direction, driving the slider 3021 on the straight sliding potentiometer 302 to move in the reverse direction by powering off the driving assembly 100.

[0086] It is to be noted that the running direction of the output end 100a on the driving assembly 100 and the current relationship can be adaptively adjusted according to the situation, which is not limited to the above-described case.

[0087] In an exemplary application scenario of the push-pull actuator according to an embodiment of the present application: the truck main driver seat air cushion adjustment can be manually adjusted, a handle switch can be arranged on the side of the seat, and the air pump valve port can be opened and closed by up and down adjustment of the handle, realizing the air cushion seat shock absorption adjustment. The push-pull actuator according to the present application can be used to replace the manual key adjustment, replacing the manual operation with the electric operation, making the operation of adjusting the seat air cushion more convenient and fast.

[0088] In summary, the output end of the driving assembly drives the pull cable assembly in the push-pull actuator according to the present application, which can integrate the straight slide potentiometer in the support, can detect the stroke position of the pull cable with high precision, and can feed back the position of the output structure to the vehicle body in real time, for example. The integrated installation of the push-pull actuator according to the present application makes it small in size and simple and convenient.

[0089] It should be noted that the terms used herein are for the purpose of describing specific aspects only and are not intended to limit the disclosure. As used herein, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be understood that the terms "comprises" and "comprising," when used in this specification, specify the presence of stated features, elements, and / or components, but do not preclude the presence or addition of one or more other features, elements, components, and / or groups thereof. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items. In the description of the drawings, like reference numbers will be used throughout several figures to designate like components.

[0090] The thicknesses of the elements in the drawings can be exaggerated in order to illustrate more clearly. It will also be understood that if an element is referred to as being on, coupled to, or connected to another element, it can be directly on, coupled to, or connected to the other element, or intervening elements can be present. In contrast, if an element is referred to as being directly on, directly coupled to, or directly connected to another element, there are no intervening elements present. Other words used to describe the relationship between elements should be interpreted in a like fashion, e.g., "between" versus "directly between," "adjacent" versus "directly adjacent," etc.

[0091] The terms, such as "top," "bottom," "front," "rear," "upper," "lower," and the like, are used herein to describe elements as they are shown in the drawings. It will be understood that these terms are intended to encompass other orientations of the device, as well as the orientations shown in the drawings.

[0092] It will be understood that, although the terms "first," "second," etc. can be used herein to describe various elements, these elements should not be limited by these terms. These terms are only used to distinguish one element from another. Thus, a first element could be termed a second element without departing from the teachings of the present application.

[0093] It can also be considered that all the exemplary embodiments disclosed herein can be combined with each other arbitrarily.

[0094] The above-described embodiments are merely intended to illustrate the technical ideas and characteristics of the present application, and to enable those skilled in the art to understand the content of the present application and to implement the same, and cannot be used to limit the patent application range of the present application, that is, any equivalent changes or modifications made according to the spirit of the present application still fall within the patent application range of the present application.

Claims

1. A push-pull actuator characterized by, The push-pull actuator comprises: a driving assembly (100) provided with an output end (100a) in a driving direction; a cable assembly (200) comprising a sleeve (201) and a transmission member (202) movably connected to the sleeve (201) in the driving direction, and the output end (100a) is drivingly connected to the transmission member (202); a position feedback assembly (300) comprising a straight sliding potentiometer (302) provided with a sliding block (3021) movably arranged on the straight sliding potentiometer (302) in the driving direction, the sliding stroke of the sliding block (3021) on the straight sliding potentiometer (302) matches the sliding stroke of the transmission member (202) on the sleeve (201), and the sliding block (3021) is connected to the transmission member (202) and / or the output end (100a).

2. A push-pull actuator according to claim 1, wherein The position feedback assembly (300) comprises a support (301) supporting the driving assembly (100), the sleeve (201) and the straight sliding potentiometer (302) respectively.

3. A push-pull actuator according to claim 1 or 2, wherein The sliding block (3021) is connected between the transmission member (202) and the output end (100a).

4. A push-pull actuator according to claim 3, wherein The push-pull actuator further comprises: an adapter (400) connecting the output end (100a), the transmission member (202) and the sliding block (3021), and the adapter (400) and the straight sliding potentiometer (302) are hidden in the support (301).

5. A push-pull actuator according to claim 4, wherein The output end (100a), the transmission member (202) and the sliding block (3021) are detachably connected to the adapter (400) respectively.

6. A push-pull actuator according to claim 5, wherein The adapter (400) is a cylindrical adapter (400) whose axis direction coincides with the driving direction, one side of the adapter (400) in the radial direction is provided with a mounting groove (401) communicating with both sides of the adapter (400) in the axis direction, the inner wall of the mounting groove (401) on one side in the driving direction is provided with a profiling groove (4011), the inner wall of the mounting groove (401) on the other side in the driving direction is provided with a limiting groove (4012), and the outer wall of the adapter (400) in the radial direction is provided with a terminal groove (402). One end of the transmission member (202) connected to the output end (100a) extends radially to form a die-casting head (2021), the die-casting head (2021) matches the profiling groove (4011), the output end (100a) matches the limiting groove (4012), and the terminal groove (402) matches the sliding block (3021).

7. A push-pull actuator according to claim 6, wherein In the radial direction of the adapter (400), the size of the mounting groove (401) is not less than the size of the transmission member (202).

8. A push-pull actuator according to any one of the preceding claims 2 to 7, characterized in that The support member (301) is provided with a support cavity (3011), and a support opening (3012) is formed on one side of the support member (301) in a direction perpendicular to the driving direction and communicates between the inside and outside of the support cavity (3011). Drive grooves (3013) and cable grooves (3014) are respectively formed on both sides of the support opening (3012) in the driving direction. The drive assembly (100) is provided with a housing (101), and the output end (100a) is located on the housing (101). The housing (101) and the drive groove (3013) are interference connected, and the cable groove (3014) and the sleeve (201) are interference connected.

9. A push-pull actuator according to claim 8, wherein An annular cylinder groove (2011) is formed on the radial outer wall of the sleeve (201), and the cylinder groove (2011) is arranged close to the drive assembly (100). The inner wall of the cylinder groove (2011) and the inner wall of the cable groove (3014) are interference connected.

10. A push-pull actuator according to claim 8 or 9, wherein The bottom wall of the support cavity (3011) is connected with the straight sliding potentiometer (302), in particular through buckles (3022). Preferably, the buckles (3022) are divided into multiple groups, and adjacent groups of buckles (3022) are arranged in sequence and spaced apart in the driving direction. Preferably, the number of buckles (3022) in each group is multiple, and the buckles (3022) in each group are arranged in a direction perpendicular to the driving direction.

11. A push-pull actuator according to any one of the preceding claims 1 to 10, characterized in that The drive assembly (100) comprises: a housing (101), wherein a power source (102) is mounted inside the housing (101); a lead screw (103), wherein a transmission unit (104) is arranged on the lead screw (103), and the transmission unit (104) is connected with the power source (102), so that the power source (102) can drive the lead screw (103) to rotate through the transmission unit (104); a nut (105), wherein one end of the nut (105) is threadedly sleeved on the lead screw (103), and the nut (105) can move horizontally reciprocating along the axis direction of the lead screw (103), and the other end of the nut (105) is the output end (100a); a power supply opening (1011) is formed on the housing (101), and a power supply wire bundle connected with the power source (102) is arranged to be suitable for entering and exiting the housing (101) through the power supply opening (1011).

12. A push-pull actuator according to any one of the preceding claims 1 to 11, characterized in that An output opening (3015) is formed on the support member (301) and communicates between the inside and outside, and a wire bundle on the straight sliding potentiometer (302) is arranged to be suitable for entering and exiting the support member (301) through the output opening (3015).

13. A push-pull actuator according to claim 12, wherein The power supply opening (1011) and the output opening (3015) are located on the same side in a direction perpendicular to the driving direction.

14. A push-pull actuator according to any one of the preceding claims 11 to 13, characterized in that The drive assembly (100) further comprises: An automatic return unit is arranged on the end of the lead screw (103) away from the nut (105), and can drive the lead screw (103) to rotate automatically and drive the nut (105) to move back to the original position when the power source (102) is in action or not in action.

15. A push-pull actuator according to any one of the preceding claims 1 to 14, characterized in that The transmission member (20) is a rigid member, and in particular, the rigid member is bendable.

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