An electric push rod

Abstract

The present invention relates to the technical field of electric push rods, and specifically to an electric push rod, comprising a drive device housing and a drive component; at least one first heat dissipation hole is arranged on the side wall of a first connecting tube, and the first heat dissipation hole is communicated with a second accommodating chamber; a first end of the first connecting tube is fixedly connected to the drive device housing; a second connecting tube, at least one second heat dissipation hole is arranged on the side wall of the second connecting tube, and the second heat dissipation hole is communicated with a third accommodating chamber; one end of the transmission component is drive-connected to the drive component, and the other end of the transmission component is connected to the second connecting tube; under the action of the drive component, the transmission component converts rotational motion into linear motion of the second connecting tube to adjust the distance between the second connecting tube and the drive component; the present invention does not need to change the material of the electric push rod, but reduces the working temperature of the electric push rod, can shorten the rest time of the electric push rod, and can improve the working efficiency of the electric push rod on the basis of ensuring the service life of the electric push rod.

Description

Technical Field

[0001] The present invention relates to the technical field of electric push rods, and in particular to an electric push rod. Background Art

[0002] An electric push rod is an electric drive device that converts the rotational motion of a motor into the linear reciprocating motion of a push rod. The existing electric push rod includes a motor, a transmission assembly connected to the motor, and a sleeve assembly connected to the transmission assembly. The sleeve assembly can be extended and retracted. When the motor rotates, the transmission assembly drives the sleeve assembly to achieve the extension and retraction function.

[0003] After being used for a period of time, the existing electric linear actuator needs to rest for a period of time. If it is not rested, the service life of the electric linear actuator will be greatly reduced. However, users often operate the electric linear actuator continuously and do not shut down the electric linear actuator for rest. In order to solve the problem of greatly reduced service life of the electric linear actuator, the material of the relevant structure inside the electric linear actuator is generally changed. By changing the material, the life of the electric linear actuator is extended, but this will increase the preparation cost of the electric linear actuator.

[0004] Based on the shortcomings of the prior art, there is an urgent need to study an electric push rod to solve the above problems. Summary of the invention

[0005] In order to solve the above technical problems, the present invention provides an electric push rod. The present invention does not need to change the material of the electric push rod, but can shorten the rest time of the electric push rod by lowering the working temperature of the electric push rod. On the basis of ensuring the service life of the electric push rod and reducing the preparation cost, the working efficiency of the electric push rod can be improved and the user experience can be improved.

[0006] The present invention provides an electric push rod, comprising:

[0007] The driving device housing has a first accommodating cavity;

[0008] A driving assembly disposed in the first accommodating chamber;

[0009] A first connecting tube, having a second accommodating cavity connected to the first accommodating cavity, at least one first heat dissipation hole is provided on a side wall of the first connecting tube, the first heat dissipation hole is connected to the second accommodating cavity; a first end of the first connecting tube is fixedly connected to the housing of the driving device;

[0010] A second connecting tube with the first connecting tube sleeved on the outside thereof has a third accommodating cavity, and at least one second heat dissipation hole is arranged on the side wall of the second connecting tube, and the second heat dissipation hole is communicated with the third accommodating cavity;

[0011] A transmission assembly, one end of which is drivingly connected to the drive assembly, and the other end of which is connected to the second connecting pipe;

[0012] Under the action of the driving assembly, the transmission assembly is used to convert the rotational motion of the driving assembly into the linear motion of the second connecting tube, so as to adjust the distance between the second connecting tube and the driving assembly.

[0013] Furthermore, when the first connecting tube moves relative to the second connecting tube, the second heat dissipation hole on the second connecting tube can be intermittently connected with the first heat dissipation hole on the first connecting tube;

[0014] The heat dissipation path of the structure inside the second connecting tube is to pass through the third accommodating cavity and then flow out from the second heat dissipation hole;

[0015] And / or, the heat dissipation path of the structure inside the second connecting tube passes through the third accommodating cavity and then passes through the second heat dissipation hole and the first heat dissipation hole in sequence.

[0016] Furthermore, the heat dissipation path of the structure inside the first connecting tube is to pass through the second accommodating cavity and then flow out from the first heat dissipation hole;

[0017] The heat dissipation path of the structure inside the driving device housing is to pass through the first accommodating cavity and the second accommodating cavity in sequence and then flow out through the first heat dissipation hole.

[0018] Further, the interval between two adjacent first heat dissipation holes is the same as the interval between two adjacent second heat dissipation holes.

[0019] Further, the at least one first heat dissipation hole is arranged along the length direction of the first connecting tube, and the at least one second heat dissipation hole is arranged along the length direction of the second connecting tube.

[0020] Furthermore, it also includes a micro switch, and the micro switch is arranged in the second accommodating cavity;

[0021] The micro switch is in communication connection with the driving assembly, and the micro switch is used to control the stroke of the transmission assembly.

[0022] Further, the second accommodating chamber comprises a main chamber and a sub-chamber which are interconnected, the main chamber and the sub-chamber are arranged along the length direction of the first connecting pipe, and the first heat dissipation holes are provided on the main chamber and the sub-chamber;

[0023] The main cavity is capable of accommodating the transmission assembly and the second connecting pipe;

[0024] The sub-cavity is capable of accommodating the micro switch.

[0025] Further, the transmission assembly includes a first transmission member and a second transmission member that cooperate with each other, the first end of the first transmission member is drivingly connected to the driving end of the driving assembly, and the second end of the first transmission member passes through the second transmission member and then extends into the third accommodating chamber;

[0026] The second transmission member is disposed in the second accommodating cavity, and the first end of the second connecting pipe is fixedly connected to the second transmission member;

[0027] Under the action of the driving assembly, the first transmission member rotates and drives the second transmission member to move along the axial direction of the first transmission member to adjust the distance between the second connecting pipe and the driving assembly.

[0028] Furthermore, at least one slide groove is provided on the inner wall of the first connecting pipe, and at least one first protrusion corresponding to the at least one slide groove is provided on the second transmission member;

[0029] The first connecting pipe is slidably matched with the first protrusion of the second transmission member through the sliding groove.

[0030] Further, the second end of the first connecting pipe is provided with an end cover, and the cross-sectional shape of the end cover is the same as the cross-sectional shape of the first connecting pipe;

[0031] The second connecting pipe is sealed and connected to the first connecting pipe through the end cover.

[0032] Implementing the embodiments of the present invention has the following beneficial effects:

[0033] The first connecting tube in the present invention is provided with a first heat dissipation hole on the side wall, so that the first connecting tube and the structure arranged therein can dissipate heat through the first heat dissipation hole, and the second connecting tube is provided with a second heat dissipation hole, so that the second connecting tube and the structure arranged therein can dissipate heat through the second heat dissipation hole; at the same time, by providing the first connecting tube and the second connecting tube that cooperate with each other, when the second connecting tube moves relative to the first connecting tube, the first connecting tube and the second connecting tube can be connected through the first heat dissipation hole and the second heat dissipation hole, so that the heat dissipation effect of the electric push rod can be further improved; more importantly, the second accommodating cavity of the first connecting tube can be connected with the first accommodating cavity of the driving device housing, so that it can be ensured that the heat generated in the driving device housing can also be dissipated through the first connecting tube and the second connecting tube, so that the heat dissipation effect of the electric push rod can be further improved, thereby reducing the internal temperature of the electric push rod during operation and avoiding a significant shortening of the service life under high temperature operation; compared with the rest time of the existing electric push rod, the present application does not need to change the material of the electric push rod, but can shorten the rest time of the electric push rod by reducing the working temperature of the electric push rod, and on the basis of ensuring the service life of the electric push rod and reducing the preparation cost, it can improve the working efficiency of the electric push rod and improve the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the technical solution of the present invention, the following briefly introduces the drawings required for use in the embodiments or prior art descriptions. Obviously, the drawings described below are only some embodiments of the present invention, and those skilled in the art can obtain other drawings based on these drawings without creative work.

[0035] Figure 1 For this embodiment Figure 5 Cross-sectional view of the electric linear actuator in the FF direction;

[0036] Figure 2 is an exploded view of the transmission assembly and the first connecting pipe of this embodiment;

[0037] Figure 3 is an exploded view of the electric push rod of this embodiment;

[0038] Figure 4 This is a front view of the electric push rod of this embodiment;

[0039] Figure 5 It is a right side view of the electric push rod of this embodiment.

[0040] Among them, the reference numerals in the figure correspond to:

[0041] 1-driving device housing; 2-driving assembly; 3-transmission assembly; 4-first connecting pipe; 5-second connecting pipe; 6-end cover; 7-connector; 8-clamp ring; 9-micro switch; 11-upper cover; 12-base; 13-motor housing; 21-gear assembly; 22-driving motor; 31-first transmission member; 32-second transmission member; 41-first heat dissipation hole; 42-slide groove; 43-main cavity; 44-auxiliary cavity; 51-second heat dissipation hole; 52-third accommodating cavity; 321-first protrusion. DETAILED DESCRIPTION

[0042] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0043] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions.

[0044] In view of the defects of the prior art, a first heat dissipation hole is provided on the side wall of the first connecting tube in the present invention, so that the first connecting tube and the structure arranged therein can dissipate heat through the first heat dissipation hole, and a second heat dissipation hole is provided on the second connecting tube, so that the second connecting tube and the structure arranged therein can dissipate heat through the second heat dissipation hole; at the same time, by providing the first connecting tube and the second connecting tube that cooperate with each other, when the second connecting tube moves relative to the first connecting tube, the first connecting tube and the second connecting tube can be connected through the first heat dissipation hole and the second heat dissipation hole, so that the heat dissipation effect of the electric push rod can be further improved; more importantly, the second accommodating cavity of the first connecting tube It can be communicated with the first accommodating cavity of the driving device housing, so that the heat generated in the driving device housing can also be dissipated through the first connecting tube and the second connecting tube, which can further improve the heat dissipation effect of the electric push rod, thereby reducing the internal temperature of the electric push rod during operation and avoiding a significant shortening of the service life under high temperature operation; compared with the rest time of the existing electric push rod, the present application does not need to change the material of the electric push rod, but can shorten the rest time of the electric push rod by lowering the working temperature of the electric push rod. On the basis of ensuring the service life of the electric push rod and reducing the preparation cost, the working efficiency of the electric push rod can be improved and the user experience can be improved.

[0045] See attached Figure 1-5 The present embodiment provides an electric push rod, comprising: a driving device housing 1, having a first accommodating cavity; a driving component 2 arranged in the first accommodating cavity; a first connecting tube 4, having a second accommodating cavity communicated with the first accommodating cavity, and at least one first heat dissipation hole 41 is arranged on the side wall of the first connecting tube 4, and the first heat dissipation hole 41 is communicated with the second accommodating cavity; a first end of the first connecting tube 4 is fixedly connected to the driving device housing 1; a second connecting tube 5 with the first connecting tube 4 sleeved on the outside, having a third accommodating cavity 52, and at least one second heat dissipation hole 51 is arranged on the side wall of the second connecting tube 5, and the second heat dissipation hole 51 is communicated with the third accommodating cavity 52; a transmission component 3, one end of the transmission component 3 is drivingly connected to the driving component 2, and the other end of the transmission component 3 is connected to the second connecting tube 5; under the action of the driving component 2, the transmission component 3 is used to convert the rotational motion of the driving component 2 into the linear motion of the second connecting tube 5, so as to adjust the distance between the second connecting tube 5 and the driving component 2.

[0046] It should be noted that: in this embodiment, the first connecting tube 4 is provided with a first heat dissipation hole 41 on the side wall, so that the first connecting tube 4 and the structure arranged therein can dissipate heat through the first heat dissipation hole 41, and the second connecting tube 5 is provided with a second heat dissipation hole 51, so that the second connecting tube 5 and the structure arranged therein can dissipate heat through the second heat dissipation hole 51; at the same time, by providing the first connecting tube 4 and the second connecting tube 5 that cooperate with each other, when the second connecting tube 5 moves relative to the first connecting tube 4, the first connecting tube 4 and the second connecting tube 5 can be connected through the first heat dissipation hole 41 and the second heat dissipation hole 51, so that the heat dissipation effect of the electric push rod can be further improved; more importantly, the first connecting tube 4 and the second connecting tube 5 are provided with a second heat dissipation hole 51, so that the second connecting tube 5 can be connected with each other .... The second accommodating cavity of the connecting tube 4 can be connected to the first accommodating cavity of the driving device housing 1, so that the heat generated in the driving device housing 1 can also be dissipated through the first connecting tube 4 and the second connecting tube 5, which can further improve the heat dissipation effect of the electric push rod, thereby reducing the internal temperature of the electric push rod during operation and avoiding a significant shortening of the service life under high temperature operation; compared with the rest time of the existing electric push rod, the present application does not need to change the material of the electric push rod, but can shorten the rest time of the electric push rod by lowering the working temperature of the electric push rod. On the basis of ensuring the service life of the electric push rod and reducing the preparation cost, the working efficiency of the electric push rod can be improved and the user experience can be improved.

[0047] In this embodiment, the driving device housing 1 includes an upper cover 11, a base 12 and a motor housing 13. The upper cover 11 and the base 12 are detachably connected, and the motor housing 13 and the base 12 are detachably connected. After the upper cover 11, the base 12 and the motor housing 13 are connected, a first accommodating cavity is formed, and the driving component 2 is arranged in the first accommodating cavity.

[0048] In this embodiment, the transmission component 3 is a gear rack structure, a worm gear structure, a cam connecting rod structure or a screw nut structure. The structure of the transmission component 3 is not limited as long as it can convert the rotational motion of the driving component into linear motion along the first connecting tube 4.

[0049] Exemplarily, when the transmission component 3 is a gear and rack structure, the first connecting member 31 is a gear and the second connecting member 32 is a rack; when the transmission component 3 is a worm gear, the first connecting member 31 is a worm gear and the second connecting member 32 is a worm; when the transmission component 3 is a screw and nut structure, the first connecting member 31 is a screw and the second connecting member 32 is a screw and nut.

[0050] In some possible embodiments, when the transmission assembly 3 is a gear rack structure, the first connecting member 31 is a gear, the second connecting member 32 is a rack, the arrangement direction of the rack is set parallel to the axis of the first connecting tube 4, the rack is fixedly connected to the second connecting tube 5, the gear is drivingly connected to the driving assembly 2, the driving assembly 2 drives the gear to rotate, and the gear drives the rack to reciprocate along the axial direction of the first connecting tube 4.

[0051] In this embodiment, the transmission assembly 3 is taken as a screw nut structure for exemplary description, and the specific details are as follows:

[0052] In some possible embodiments, the transmission assembly 3 includes a first transmission member 31 and a second transmission member 32 that cooperate with each other, the first end of the first transmission member 31 is drivingly connected to the driving end of the driving assembly 2, and the second end of the first transmission member 31 passes through the second transmission member 32 and extends into the third accommodating chamber 52; the second transmission member 32 is arranged in the second accommodating chamber, and the first end of the second connecting tube 5 is fixedly connected to the second transmission member 32; under the action of the driving assembly 2, the first transmission member 31 rotates and drives the second transmission member 32 to move along the axial direction of the first transmission member 31 to adjust the distance between the second connecting tube 5 and the driving assembly 2.

[0053] Specifically, the driving assembly 2 includes a gear assembly 21 and a driving motor 22. The gear assembly 21 is fixedly arranged on the base 12, and the upper cover 11 is buckled on the side away from the motor housing 13; the gear assembly 21 is sleeved on the first end of the first transmission member 31, and the first end of the first transmission member 31 can move synchronously with the gear assembly 21.

[0054] Specifically, a first ear seat and a second ear seat that match each other are provided at one end of the driving device housing 1 away from the first connecting pipe 4 .

[0055] In this embodiment, the specific structure of the gear assembly 21 is not limited, as long as the gear assembly 21 can drive the first transmission member 31 to rotate under the drive of the driving motor 22 .

[0056] In this embodiment, the first accommodating cavity is connected to the second accommodating cavity, so that it can be ensured that the structure arranged in the first connecting tube 4 and the structure arranged in the driving device housing 1 can dissipate heat; the heat dissipation path of the structure in the driving device housing 1 is from the first accommodating cavity to the second accommodating cavity and the first heat dissipation hole 41 in sequence for heat dissipation, and the heat dissipation path of the structure in the first connecting tube 4 is from the second accommodating cavity to the first heat dissipation hole 41 for heat dissipation.

[0057] In this embodiment, the shapes and lengths of the first connecting tube 4 and the second connecting tube 5 are not limited, as long as they can cooperate with each other to realize the function of the electric push rod. Preferably, the cross-sections of the first connecting tube 4 and the second connecting tube 5 are circular.

[0058] In this embodiment, there is a gap between the outer wall of the first transmission member 31 and the first connecting pipe 4 , so that the heat dissipation effect can be ensured while ensuring the stable operation of the first transmission member 31 .

[0059] In this embodiment, the length of the first transmission member 31 is longer than the length of the first connecting pipe 4 .

[0060] In this embodiment, the first connecting pipe 4 and the second connecting pipe 5 are both made of aluminum profiles.

[0061] In some possible embodiments, when the first connecting tube 4 moves relative to the second connecting tube 5, the second heat dissipation holes 51 on the second connecting tube 5 can be intermittently connected with the first heat dissipation holes 41 on the first connecting tube 4, and the heat dissipation path of the structure inside the second connecting tube 5 is to pass through the third accommodating cavity 52 and then flow out from the second heat dissipation holes 51; and / or, the heat dissipation path of the structure inside the second connecting tube 5 is to pass through the third accommodating cavity 52 and then sequentially pass through the second heat dissipation holes 51 and the first heat dissipation holes 41. By intermittently connecting the second heat dissipation holes 51 on the second connecting tube 5 with the first heat dissipation holes 41 of the first connecting tube 4, it can be ensured that part of the second connecting tube 5 accommodated in the first connecting tube 4 can also dissipate heat through the second heat dissipation holes 51 and the first heat dissipation holes 41, so that the heat dissipation effect of the part of the second connecting tube 5 accommodated in the first connecting tube 4 can be ensured, thereby improving the heat dissipation effect of the entire electric push rod.

[0062] In some possible embodiments, the heat dissipation path of the structure inside the first connecting tube 4 is to pass through the second accommodating cavity and then flow out from the first heat dissipation hole 41; the heat dissipation path of the structure inside the driving device housing 1 is to pass through the first accommodating cavity and the second accommodating cavity in sequence and then flow out from the first heat dissipation hole 41. Through such an arrangement, the heat dissipation path can be shortened and optimized, so that the corresponding structure can be quickly dissipated and the heat dissipation effect can be improved.

[0063] In some possible embodiments, the interval between two adjacent first heat dissipation holes 41 is the same as the interval between two adjacent second heat dissipation holes 51. By setting the intervals between the two to be the same, it can be ensured that during the movement of the second connecting tube 5 relative to the first connecting tube 4, at least two first heat dissipation holes 41 on the first connecting tube 4 and at least two second heat dissipation holes 51 on the second connecting tube 5 can be reached multiple times. In this way, the heat generated by the second connecting tube 5 and the structure arranged in the second connecting tube 5 can be quickly dissipated, thereby improving the heat dissipation effect.

[0064] In this embodiment, after the first connecting tube 4 and the second connecting tube 5 are relatively installed, the axes of the corresponding first heat dissipation holes 41 and the second heat dissipation holes 51 are arranged in parallel.

[0065] In this embodiment, the shape and size of the first heat dissipation holes 41 are not limited, and the shape and size of the second heat dissipation holes 51 are not limited, as long as heat can be dissipated through the first heat dissipation holes 41 and the second heat dissipation holes 51 .

[0066] In this embodiment, the first heat dissipation hole 41 can be a circular hole, an elliptical hole or an elongated hole, etc., and the second heat dissipation hole 51 can be a circular hole, an elliptical hole or an elongated hole, etc. The shapes of the first heat dissipation hole 41 and the second heat dissipation hole 51 are the same or different.

[0067] In this embodiment, the first heat dissipation hole 41 and the second heat dissipation hole 51 are both circular holes, and the diameter of the circular holes is 100%-200% of the wall thickness of the first connecting tube 4, so that the heat dissipation effect can be improved while ensuring the strength of the first connecting tube 4 or the second connecting tube 5.

[0068] In some possible embodiments, the first heat dissipation hole 41 is an elongated hole, and the second heat dissipation hole 51 is a circular hole. The length of the elongated hole is 60%-90% of the length of the first connecting tube 4. This can ensure the strength of the second connecting tube 5 while improving the heat dissipation effect of the electric push rod.

[0069] In some possible embodiments, the first heat dissipation hole 41 is a round hole, and the second heat dissipation hole 51 is an elongated hole, and the length of the elongated hole is 60%-90% of the length of the second connecting tube 5. This can ensure the strength of the first connecting tube 4 and improve the heat dissipation effect of the electric push rod.

[0070] In some possible embodiments, at least one first heat dissipation hole 41 is arranged along the length direction of the first connecting tube 4, and at least one second heat dissipation hole 51 is arranged along the length direction of the second connecting tube 5. Such an arrangement can ensure that heat can be dissipated at any position of the first connecting tube 4 along the length direction, thereby ensuring the heat dissipation effect of the first connecting tube 4; similarly, heat can be dissipated at any position of the second connecting tube 5 along the length direction, thereby ensuring the heat dissipation effect of the second connecting tube 5.

[0071] In some possible embodiments, a micro switch 9 is further included, and the micro switch 9 is arranged in the second accommodating cavity; the micro switch 9 is communicated with the driving component 2, and the micro switch 9 is used to control the stroke of the transmission component 3. By setting the micro switch 9, the stroke of the transmission component 3 can be monitored in real time, thereby ensuring precise control of the operation of the transmission component 3 and improving the operating stability and accuracy of the overall structure.

[0072] In some possible embodiments, the second accommodating chamber includes a main chamber 43 and a sub-chamber 44 that are interconnected. The main chamber 43 and the sub-chamber 44 are arranged along the length direction of the first connecting tube 4. The main chamber 43 and the sub-chamber 44 are both provided with a first heat dissipation hole 41; the main chamber 43 can accommodate the first transmission member 31, the second transmission member 32 and the second connecting tube 5; the sub-chamber 44 can accommodate the micro switch 9. By setting the main chamber 43 and the sub-chamber 44 that are interconnected, it can be ensured that the structure arranged in the main chamber 43 and the micro switch 9 arranged in the sub-chamber 44 can both dissipate heat, and the maximum heat dissipation area is ensured, thereby improving the heat dissipation effect; at the same time, by arranging the main chamber 43 and the sub-chamber 44 along the length direction of the first connecting tube 4, the heat dissipation effect of the structure in the main chamber 43 and the sub-chamber 44 can be further improved. More importantly, by setting the main chamber 43 and the sub-chamber 44, it can be avoided that the micro switch 9 arranged in the sub-chamber 44 affects the operation of the transmission component 3 arranged in the main chamber 43, that is, on the basis of ensuring the heat dissipation effect, interference can also be avoided, thereby improving the operation stability.

[0073] In this embodiment, the shapes of the main cavity 43 and the auxiliary cavity 44 are not limited and can be limited according to actual conditions.

[0074] Preferably, the main cavity 43 has a cylindrical structure.

[0075] In this embodiment, the length of the main cavity 43 is consistent with the length of the secondary cavity 44, which facilitates the preparation of the second connecting pipe 4 and reduces the preparation cost.

[0076] In some possible embodiments, at least one slide groove 42 is provided on the inner wall of the first connecting tube 4, and at least one first protrusion 321 corresponding to the at least one slide groove 42 is provided on the second transmission member 32; the first connecting tube 4 is slidably matched with the first protrusion 321 of the second transmission member 32 through the slide groove 42. By providing the slide groove 42 on the first connecting tube 4 and the first protrusion 321 on the second transmission member 32, the second transmission member 32 can drive the second connecting tube 5 connected thereto to slide smoothly relative to the first connecting tube 4, and can avoid relative rotation between the first connecting tube 4 and the second transmission member 32. If rotation occurs, the first transmission member 31 will be unable to move relative to the second transmission member 32. Avoiding rotation can ensure the stability of the operation of the first transmission member 31 and the second transmission member 32.

[0077] In this embodiment, the number and size of the slide grooves 42 are not limited, and the number and size of the first protrusions 321 are not limited. They are set according to actual conditions as long as the slide grooves 42 and the first protrusions 321 can slide together.

[0078] In this embodiment, at least one slide groove 42 is arranged at circumferential intervals along the first connecting tube 4, and the slide groove 42 is arranged along the axial direction of the first connecting tube 4. By setting at least one slide groove 42, the second transmission member 32 and the first connecting tube 4 can be further prevented from rotating, thereby further ensuring the stability of the operation of the first transmission member 31 and the second transmission member 32.

[0079] In some possible embodiments, the second end of the first connecting tube 4 is provided with an end cover 6, and the cross-sectional shape of the end cover 6 is the same as the cross-sectional shape of the first connecting tube 4; the second connecting tube 5 is sealed and connected to the first connecting tube 4 through the end cover 6. By providing the end cover 6 with the same cross-sectional shape as the first connecting tube 4, the sealing of the connecting position between the first connecting tube 4 and the second connecting tube 5 can be ensured. By providing the end cover 6, it can also be ensured that the axis of the second connecting tube 5 coincides with the axis of the first transmission member 31 provided in the first connecting tube 4, thereby ensuring the stability of the operation of the electric push rod.

[0080] In this embodiment, a clamping groove is provided at one end of the second connecting tube 5 close to the driving device housing 1, that is, the second end of the second connecting tube 5, in which a clamping ring 8 is provided. The clamping ring 8 is detachably connected to the clamping groove. After the clamping ring 8 is connected to the clamping groove, a part of it protrudes from the side wall of the second connecting tube 5.

[0081] Specifically, at least one second protrusion arranged with at least one slide groove 42 is provided on the outer side wall of the clamping ring 8 , and the first connecting pipe 4 is slidably matched with the second connecting pipe 5 through the slide groove 42 .

[0082] In this embodiment, the cross-sectional dimension of the end cover 6 is smaller than that of the first connecting tube 4 , so that the second connecting tube 5 can be prevented from falling off from the first connecting tube 4 by providing a clamping ring 8 .

[0083] In this embodiment, the end cover 6 includes a first clamping portion and a second clamping portion which are connected to each other. The first clamping portion is a shell with openings at both ends, and the second clamping portion is a shell with an opening at one end. The first clamping portion is clamped at one end of the main cavity 43, and the second clamping portion is clamped at one end of the auxiliary cavity 44, and the auxiliary cavity 44 is sealed; the diameter of the first clamping portion is smaller than the diameter of the main cavity 43, the diameter of the first clamping portion is larger than the diameter of the second connecting pipe 5, and the diameter of the first clamping portion is smaller than the outer diameter of the clamping ring 8.

[0084] Specifically, the connection process of the first connecting tube 4 and the second connecting tube 5 is as follows: the second end of the second connecting tube 5 is inserted into the first connecting tube 4 and extended out, the clamping ring 8 is clamped in the clamping groove, the end cover 6 is fixed to the second end of the first connecting tube 4, and the first end of the first connecting tube 4 is fixedly connected to the driving device housing 1.

[0085] In some possible embodiments, the second end of the second connecting tube 5 is sealed with a connecting head 7, and the side of the connecting head 7 away from the second connecting tube 5 can be connected to an external structure to drive the external structure to move synchronously. By setting the connecting head 7, the electric push rod can be connected to the external structure to ensure the stability of the operation of the electric push rod.

[0086] In this embodiment, a connection position is provided on the connector 7, and the connector 7 is connected to the external structure through the connection position.

[0087] Embodiment 1

[0088] See attached Figure 1-5 The present embodiment provides an electric push rod, comprising: a driving device housing 1, having a first accommodating cavity; a driving component 2 arranged in the first accommodating cavity; a first connecting tube 4, having a second accommodating cavity communicated with the first accommodating cavity, and at least one first heat dissipation hole 41 is arranged on the side wall of the first connecting tube 4, and the first heat dissipation hole 41 is communicated with the second accommodating cavity; a first end of the first connecting tube 4 is fixedly connected to the driving device housing 1; a second connecting tube 5 with the first connecting tube 4 sleeved on the outside, having a third accommodating cavity 52, and at least one second heat dissipation hole 51 is arranged on the side wall of the second connecting tube 5, and the second heat dissipation hole 51 is communicated with the third accommodating cavity 52; a transmission component 3, one end of the transmission component 3 is drivingly connected to the driving component 2, and the other end of the transmission component 3 is connected to the second connecting tube 5; under the action of the driving component 2, the transmission component 3 is used to convert the rotational motion of the driving component 2 into the linear motion of the second connecting tube 5, so as to adjust the distance between the second connecting tube 5 and the driving component 2.

[0089] In this embodiment, the driving device housing 1 includes an upper cover 11, a base 12 and a motor housing 13. The upper cover 11 and the base 12 are detachably connected, and the motor housing 13 and the base 12 are detachably connected. After the upper cover 11, the base 12 and the motor housing 13 are connected, a first accommodating cavity is formed, and the driving component 2 is arranged in the first accommodating cavity.

[0090] In this embodiment, the transmission assembly 3 includes a first transmission member 31 and a second transmission member 32 that cooperate with each other. The first end of the first transmission member 31 is drivingly connected to the driving end of the driving assembly 2, and the second end of the first transmission member 31 passes through the second transmission member 32 and extends into the third accommodating chamber 52; the second transmission member 32 is arranged in the second accommodating chamber, and the first end of the second connecting tube 5 is fixedly connected to the second transmission member 32; under the action of the driving assembly 2, the first transmission member 31 rotates and drives the second transmission member 32 to move along the axial direction of the first transmission member 31 to adjust the distance between the second connecting tube 5 and the driving assembly 2. The first transmission member 31 is a screw, and the second transmission member 32 is a screw nut.

[0091] Specifically, the driving assembly 2 includes a gear assembly 21 and a driving motor 22. The gear assembly 21 is fixedly arranged on the base 12, and the upper cover 11 is buckled on the side away from the motor housing 13; the gear assembly 21 is sleeved on the first end of the first transmission member 31, and the first end of the first transmission member 31 can move synchronously with the gear assembly 21.

[0092] Specifically, a first ear seat and a second ear seat that match each other are provided at one end of the driving device housing 1 away from the first connecting pipe 4 .

[0093] In this embodiment, the specific structure of the gear assembly 21 is not limited, as long as the gear assembly 21 can drive the first transmission member 31 to rotate under the drive of the driving motor 22 .

[0094] In this embodiment, a micro switch 9 is also included. The micro switch 9 is arranged in the second accommodating cavity. The micro switch 9 is communicatively connected with the driving assembly 2 and is used to control the stroke of the first transmission member 31 .

[0095] In this embodiment, the shapes and lengths of the first connecting tube 4 and the second connecting tube 5 are not limited, as long as they can cooperate with each other to realize the function of the electric push rod. Preferably, the cross-sections of the first connecting tube 4 and the second connecting tube 5 are circular.

[0096] In this embodiment, there is a gap between the outer wall of the first transmission member 31 and the first connecting pipe 4 , so that the heat dissipation effect can be ensured while ensuring the stable operation of the first transmission member 31 .

[0097] In this embodiment, the length of the first transmission member 31 is longer than the length of the first connecting pipe 4 .

[0098] In this embodiment, the first connecting pipe 4 and the second connecting pipe 5 are both made of aluminum profiles.

[0099] In this embodiment, an end cap 6 is provided at the second end of the first connecting pipe 4 , and the cross-sectional shape of the end cap 6 is the same as that of the first connecting pipe 4 ; the second connecting pipe 5 is sealedly connected to the first connecting pipe 4 via the end cap 6 .

[0100] In this embodiment, a clamping groove is provided at one end of the second connecting tube 5 close to the driving device housing 1, that is, the second end of the second connecting tube 5, in which a clamping ring 8 is provided. The clamping ring 8 is detachably connected to the clamping groove. After the clamping ring 8 is connected to the clamping groove, a part of it protrudes from the side wall of the second connecting tube 5.

[0101] Specifically, at least one second protrusion arranged with at least one slide groove 42 is provided on the outer side wall of the clamping ring 8 , and the first connecting pipe 4 is slidably matched with the second connecting pipe 5 through the slide groove 42 .

[0102] In this embodiment, the cross-sectional dimension of the end cover 6 is smaller than that of the first connecting tube 4 , so that the second connecting tube 5 can be prevented from falling off from the first connecting tube 4 by providing a clamping ring 8 .

[0103] In this embodiment, the end cover 6 includes a first clamping portion and a second clamping portion which are connected to each other. The first clamping portion is a shell with openings at both ends, and the second clamping portion is a shell with an opening at one end. The first clamping portion is clamped at one end of the main cavity 43, and the second clamping portion is clamped at one end of the auxiliary cavity 44, and the auxiliary cavity 44 is sealed; the diameter of the first clamping portion is smaller than the diameter of the main cavity 43, the diameter of the first clamping portion is larger than the diameter of the second connecting pipe 5, and the diameter of the first clamping portion is smaller than the outer diameter of the clamping ring 8.

[0104] Specifically, the connection process of the first connecting tube 4 and the second connecting tube 5 is as follows: the second end of the second connecting tube 5 is inserted into the first connecting tube 4 and extended out, the clamping ring 8 is clamped in the clamping groove, the end cover 6 is fixed to the second end of the first connecting tube 4, and the first end of the first connecting tube 4 is fixedly connected to the driving device housing 1.

[0105] In this embodiment, the second end of the second connecting tube 5 is sealed with a connecting head 7, and the side of the connecting head 7 away from the second connecting tube 5 can be connected to an external structure to drive the external structure to move synchronously.

[0106] In this embodiment, a connection position is provided on the connector 7, and the connector 7 is connected to the external structure through the connection position.

[0107] In this embodiment, when the first connecting tube 4 moves relative to the second connecting tube 5, the second heat dissipation hole 51 on the second connecting tube 5 can be intermittently connected with the first heat dissipation hole 41 on the first connecting tube 4, and the heat dissipation path of the structure inside the second connecting tube 5 is to pass through the third accommodating cavity 52 and then flow out from the second heat dissipation hole 51; and / or, the heat dissipation path of the structure inside the second connecting tube 5 is to pass through the third accommodating cavity 52 and then pass through the second heat dissipation hole 51 and the first heat dissipation hole 41 in sequence.

[0108] In this embodiment, the heat dissipation path of the structure inside the first connecting tube 4 is to pass through the second accommodating cavity and then flow out from the first heat dissipation hole 41; the heat dissipation path of the structure inside the driving device housing 1 is to pass through the first accommodating cavity and the second accommodating cavity in sequence and then flow out from the first heat dissipation hole 41.

[0109] In this embodiment, the interval between two adjacent first heat dissipation holes 41 is the same as the interval between two adjacent second heat dissipation holes 51 .

[0110] In this embodiment, after the first connecting tube 4 and the second connecting tube 5 are relatively installed, the axes of the corresponding first heat dissipation holes 41 and the second heat dissipation holes 51 are arranged in parallel.

[0111] In this embodiment, the shape and size of the first heat dissipation holes 41 are not limited, and the shape and size of the second heat dissipation holes 51 are not limited, as long as heat can be dissipated through the first heat dissipation holes 41 and the second heat dissipation holes 51 .

[0112] In this embodiment, the first heat dissipation hole 41 and the second heat dissipation hole 51 are both circular holes, and the diameter of the circular holes is 100%-200% of the wall thickness of the first connecting tube 4, so that the heat dissipation effect can be improved while ensuring the strength of the first connecting tube 4 or the second connecting tube 5.

[0113] In this embodiment, at least one first heat dissipation hole 41 is arranged along the length direction of the first connecting tube 4 , and at least one second heat dissipation hole 51 is arranged along the length direction of the second connecting tube 5 .

[0114] In this embodiment, the second accommodating chamber includes a main chamber 43 and a sub-chamber 44 that are interconnected. The main chamber 43 and the sub-chamber 44 are arranged along the length direction of the first connecting tube 4. The main chamber 43 and the sub-chamber 44 are both provided with first heat dissipation holes 41; the main chamber 43 can accommodate the first transmission member 31, the second transmission member 32 and the second connecting tube 5; the sub-chamber 44 can accommodate the micro switch 9.

[0115] In this embodiment, the shapes of the main cavity 43 and the auxiliary cavity 44 are not limited and can be limited according to actual conditions.

[0116] Preferably, the main cavity 43 has a cylindrical structure.

[0117] In this embodiment, the length of the main cavity 43 is consistent with the length of the sub-cavity 44 .

[0118] In this embodiment, at least one slide groove 42 is provided on the inner wall of the first connecting tube 4, and at least one first protrusion 321 corresponding to the at least one slide groove 42 is provided on the second transmission member 32; the first connecting tube 4 is slidably matched with the first protrusion 321 of the second transmission member 32 through the slide groove 42.

[0119] In this embodiment, the number and size of the slide grooves 42 are not limited, and the number and size of the first protrusions 321 are not limited. They are set according to actual conditions as long as the slide grooves 42 and the first protrusions 321 can slide together.

[0120] In this embodiment, at least one slide groove 42 is arranged at intervals along the circumference of the first connecting pipe 4 , and the slide groove 42 is arranged along the axial direction of the first connecting pipe 4 .

[0121] The embodiments of the present application have been described above, and the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The selection of terms used herein is intended to best explain the principles of the embodiments, practical applications, or technical improvements in the market, or to enable other persons of ordinary skill in the art to understand the embodiments disclosed herein.

[0122] In the absence of conflict, the above embodiments and features in the embodiments can be combined with each other.

[0123] The above disclosure is only a preferred embodiment of the present invention, which certainly cannot be used to limit the scope of the present invention. Therefore, equivalent changes made according to the claims of the present invention are still within the scope of the present invention.

Claims

1. An electric push rod, characterized in that: include: A drive device housing (1) having a first accommodating chamber; A drive assembly (2) disposed in the first accommodating chamber; A first connecting tube (4) having a second accommodating cavity connected to the first accommodating cavity, at least one first heat dissipation hole (41) being provided on a side wall of the first connecting tube (4), the first heat dissipation hole (41) being connected to the second accommodating cavity; a first end of the first connecting tube (4) being fixedly connected to the driving device housing (1); A second connecting tube (5) with the first connecting tube (4) sleeved on the outside thereof has a third accommodating cavity (52), and at least one second heat dissipation hole (51) is arranged on the side wall of the second connecting tube (5), and the second heat dissipation hole (51) is communicated with the third accommodating cavity (52); A transmission assembly (3), one end of the transmission assembly (3) being drivingly connected to the drive assembly (2), and the other end of the transmission assembly (3) being connected to the second connecting pipe (5); Under the action of the driving assembly (2), the transmission assembly (3) is used to convert the rotational motion of the driving assembly (2) into the linear motion of the second connecting tube (5) so as to adjust the distance between the second connecting tube (5) and the driving assembly (2).

2. The electric push rod according to claim 1, characterized in that: When the first connecting tube (4) moves relative to the second connecting tube (5), the second heat dissipation hole (51) on the second connecting tube (5) can be intermittently connected with the first heat dissipation hole (41) on the first connecting tube (4); The heat dissipation path of the structure inside the second connecting tube (5) is to pass through the third accommodating cavity (52) and then flow out from the second heat dissipation hole (51); And / or, the heat dissipation path of the structure inside the second connecting tube (5) passes through the third accommodating cavity (52), and then passes through the second heat dissipation hole (51) and the first heat dissipation hole (41) in sequence.

3. The electric push rod according to claim 2, characterized in that: The heat dissipation path of the internal structure of the first connecting tube (4) is to pass through the second accommodating cavity and then flow out from the first heat dissipation hole (41); The heat dissipation path of the structure inside the driving device housing (1) passes through the first accommodating cavity and the second accommodating cavity in sequence and then flows out through the first heat dissipation hole (41).

4. The electric push rod according to claim 2, characterized in that: The interval between two adjacent first heat dissipation holes (41) is the same as the interval between two adjacent second heat dissipation holes (51).

5. The electric push rod according to claim 1, characterized in that: The at least one first heat dissipation hole (41) is arranged along the length direction of the first connecting tube (4), and the at least one second heat dissipation hole (51) is arranged along the length direction of the second connecting tube (5).

6. The electric push rod according to claim 1, characterized in that: It also includes a micro switch (9), wherein the micro switch (9) is arranged in the second accommodating cavity; The micro switch (9) is in communication connection with the drive assembly (2), and the micro switch (9) is used to control the travel of the transmission assembly (3).

7. The electric push rod according to claim 6, characterized in that: The second accommodating cavity comprises a main cavity (43) and a secondary cavity (44) which are interconnected, the main cavity (43) and the secondary cavity (44) are arranged along the length direction of the first connecting pipe (4), and the first heat dissipation holes (41) are provided on the main cavity (43) and the secondary cavity (44); The main cavity (43) is capable of accommodating the transmission assembly (3) and the second connecting pipe (5); The sub-chamber (44) is capable of accommodating the micro switch (9).

8. The electric push rod according to claim 1, characterized in that: The transmission assembly (3) comprises a first transmission member (31) and a second transmission member (32) which cooperate with each other, wherein a first end of the first transmission member (31) is drivingly connected to a driving end of the driving assembly (2), and a second end of the first transmission member (31) passes through the second transmission member (32) and then extends into the third accommodating chamber (52); The second transmission member (32) is arranged in the second accommodating cavity, and the first end of the second connecting pipe (5) is fixedly connected to the second transmission member (32); Under the action of the driving assembly (2), the first transmission member (31) rotates and drives the second transmission member (32) to move along the axial direction of the first transmission member (31) to adjust the distance between the second connecting pipe (5) and the driving assembly (2).

9. The electric push rod according to claim 8, characterized in that: At least one slide groove (42) is provided on the inner wall of the first connecting pipe (4), and at least one first protrusion (321) corresponding to the at least one slide groove (42) is provided on the second transmission member (32); The first connecting pipe (4) is slidably matched with the first protrusion (321) of the second transmission member (32) through the sliding groove (42).

10. The electric push rod according to any one of claims 1 to 7, characterized in that: The second end of the first connecting tube (4) is provided with an end cover (6), and the cross-sectional shape of the end cover (6) is the same as the cross-sectional shape of the first connecting tube (4); The second connecting pipe (5) is sealedly connected to the first connecting pipe (4) via the end cover (6).

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