Electric push rod

Abstract

The utility model relates to the technical field of electric push rods, in particular to an electric push rod which comprises an installation shell and a driving assembly. The first heat dissipation pipe is provided with at least one first heat dissipation hole, and the first heat dissipation hole communicates with the second mounting cavity; the first end of the first radiating pipe is fixedly connected with the mounting shell; a transmission assembly; the outer side of the second heat dissipation pipe is sleeved with the first heat dissipation pipe, at least one second heat dissipation hole is formed in the side wall of the second heat dissipation pipe, and the second heat dissipation hole communicates with the third mounting cavity; the first end of the second heat dissipation pipe is fixedly connected with the lead screw nut, and the second end of the lead screw penetrates through the lead screw nut and then extends into the third mounting cavity; the distance between the second heat dissipation pipe and the driving assembly is adjusted under the action of the driving assembly; the material of the electric push rod does not need to be changed, the working temperature of the electric push rod is reduced, the rest time of the electric push rod can be shortened, and the working efficiency of the electric push rod can be improved on the basis of guaranteeing the service life of the electric push rod.

Description

TECHNICAL FIELD

[0001] The utility model relates to electric push rod technical field, especially a kind of electric push rod. BACKGROUND

[0002] Electric push rod, also known as push rod motor, electric cylinder and linear actuator, is a kind of electric power drive device that converts the rotary motion of motor into the linear reciprocating motion of push rod, which can be used as an execution machine in various simple or complex process to realize remote control, centralized control or automatic control.

[0003] The existing electric push rod needs to rest for a period of time after being used for a period of time, and if it is not rested, the service life of the electric push rod will be greatly reduced. However, users often operate continuously and do not stop the electric push rod for rest. In order to solve the problem of greatly reducing the service life of the electric push rod, the material of the related structure in the electric push rod is changed to prolong the service life of the electric push rod. However, this will increase the preparation cost of the electric push rod. UTILITY MODEL CONTENTS

[0004] In order to solve the above technical problems, the utility model provides an electric push rod. The utility model does not need to change the material of the electric push rod, but reduces the working temperature of the electric push rod, which can shorten the rest time 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.

[0005] The utility model provides an electric push rod, which comprises:

[0006] A mounting shell having a first mounting cavity;

[0007] A drive assembly arranged in the first mounting cavity;

[0008] A first heat dissipation pipe having a second mounting cavity in communication with the first mounting cavity, at least one first heat dissipation hole is arranged on the side wall of the first heat dissipation pipe, and the first heat dissipation hole is in communication with the second mounting cavity; the first end of the first heat dissipation pipe is fixedly connected with the mounting shell;

[0009] A transmission assembly comprising a screw rod and a screw nut cooperating with each other, the first end of the screw rod is drivingly connected with the driving end of the drive assembly, and the screw nut is arranged in the second mounting cavity;

[0010] The second heat dissipation pipe is sleeved outside the first heat dissipation pipe, has a third mounting cavity, and at least one second heat dissipation hole is arranged on the side wall of the second heat dissipation pipe and communicates with the third mounting cavity; the first end of the second heat dissipation pipe is fixedly connected with the screw nut, and the second end of the screw rod extends into the third mounting cavity after penetrating through the screw nut;

[0011] The heat dissipation path of the first heat dissipation pipe inner structure is outflowing from the first heat dissipation hole after passing through the second mounting cavity;

[0012] The heat dissipation path of the mounting shell inner structure is outflowing from the first heat dissipation hole after sequentially passing through the first mounting cavity and the second mounting cavity;

[0013] Under the action of the driving assembly, the screw rod rotates and drives the screw nut to move along the axis direction of the screw rod, so as to adjust the distance between the second heat dissipation pipe and the driving assembly.

[0014] Further, under the condition that the first heat dissipation pipe moves relative to the second heat dissipation pipe, the second heat dissipation hole on the second heat dissipation pipe can intermittently communicate with the first heat dissipation hole on the first heat dissipation pipe;

[0015] The heat dissipation path of the second heat dissipation pipe inner structure is outflowing from the second heat dissipation hole after passing through the third mounting cavity;

[0016] And / or, the heat dissipation path of the second heat dissipation pipe inner structure is outflowing from the second heat dissipation hole and the first heat dissipation hole after passing through the third mounting cavity.

[0017] Further, the first heat dissipation hole is at least one of a circular hole, an elliptical hole or a long strip hole, and the second heat dissipation hole is at least one of a circular hole, an elliptical hole or a long strip hole.

[0018] Further, when the first heat dissipation hole and the second heat dissipation hole are both circular holes, the interval between two adjacent first heat dissipation holes is the same as the interval between two adjacent second heat dissipation holes.

[0019] Further, one of the first heat dissipation hole on the first heat dissipation pipe or the second heat dissipation hole on the second heat dissipation pipe is a circular hole, and the other is a long strip hole.

[0020] Further, when the heat dissipation hole is a long strip hole, the length of the heat dissipation hole is 60%-90% of the length of the connecting pipe.

[0021] Further, the second mounting cavity comprises a first sub-mounting cavity and a second sub-mounting cavity which are in communication with each other, the first sub-mounting cavity and the second sub-mounting cavity are arranged along the length direction of the first heat dissipation pipe, and the first sub-mounting cavity and the second sub-mounting cavity are both provided with the first heat dissipation hole;

[0022] The first sub-mounting cavity can accommodate the lead screw, the lead screw nut and the second heat dissipation pipe.

[0023] The second sub-mounting cavity can accommodate the micro switch.

[0024] Further, at least one clamping groove is arranged on the inner wall of the first heat dissipation pipe, and at least one first clamping protrusion corresponding to the at least one clamping groove is arranged on the lead screw nut.

[0025] The first heat dissipation pipe is in sliding fit with the first clamping protrusion of the lead screw nut through the clamping groove.

[0026] Further, the second end of the first heat dissipation pipe is provided with an end cover, and the cross-sectional shape of the end cover is the same as that of the first heat dissipation pipe.

[0027] The second heat dissipation pipe is in sealed connection with the first heat dissipation pipe through the end cover.

[0028] Further, the second end of the second heat dissipation pipe is in sealed connection with a connecting piece, and the side of the connecting piece away from the second heat dissipation pipe can be connected with an external structure to drive the external structure to move synchronously.

[0029] The embodiment of the utility model has the following beneficial effects:

[0030] The side wall of the first radiating pipe is provided with a first radiating hole, so that the first radiating pipe and the structure arranged in the first radiating pipe can radiate heat through the first radiating hole; the second radiating pipe is provided with a second radiating hole, so that the second radiating pipe and the structure arranged in the second radiating pipe can radiate heat through the second radiating hole; meanwhile, the first radiating pipe and the second radiating pipe are arranged in cooperation, so that when the second radiating pipe moves relative to the first radiating pipe, the first radiating pipe and the second radiating pipe can be communicated through the first radiating hole and the second radiating hole, so that the heat dissipation effect of the electric push rod can be further improved; more importantly, the second mounting cavity of the first radiating pipe can be communicated with the first mounting cavity of the mounting shell, so that the heat generated in the mounting shell can also be radiated through the first radiating pipe and the second radiating pipe, so that the heat dissipation effect of the electric push rod can be further improved, so as to reduce the internal temperature of the electric push rod during operation and avoid greatly shortening the service life under high temperature working; compared with the rest time of the existing electric push rod, the electric push rod 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, so as to improve the working efficiency of the electric push rod and improve the use experience of the user on the basis of guaranteeing the service life of the electric push rod and reducing the preparation cost. BRIEF DESCRIPTION OF DRAWINGS

[0031] In order to more clearly illustrate the technical scheme of the present application, the following will briefly introduce the drawings needed to be used in the embodiment or prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and those skilled in the art can obtain other drawings according to these drawings without creating any creative labor.

[0032] Fig. 1 It is a structural diagram of the electric push rod of the present embodiment.

[0033] Fig. 2 It is an explosion view of the transmission assembly and the first radiating pipe of the present embodiment.

[0034] Fig. 3 It is an explosion view of the electric push rod of the present embodiment.

[0035] In the drawings, the reference signs correspond to:

[0036] 1 - mounting shell; 2 - drive assembly; 3 - transmission assembly; 4 - first radiating pipe; 5 - second radiating pipe; 6 - end cover; 7 - connecting piece; 8 - snap ring; 9 - micro switch; 11 - upper cover; 12 - base; 13 - motor shell; 21 - gear assembly; 22 - drive motor; 31 - screw rod; 32 - screw rod nut; 41 - first radiating hole; 42 - clamping groove; 43 - first sub-mounting cavity; 44 - second sub-mounting cavity; 51 - second radiating hole; 52 - third mounting cavity; 321 - first clamping protrusion. DETAILED DESCRIPTION

[0037] The technical solutions in the embodiments of the present application will be clearly and completely described with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work belong to the scope of protection of the present application.

[0038] It should be noted that the terms "first", "second" and the like in the description and claims of the present application and the above drawings are used to distinguish similar objects, and do not necessarily have to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion.

[0039] In view of the defects of the prior art, the side wall of the first heat dissipation pipe in the present application is provided with a first heat dissipation hole, so that the first heat dissipation pipe and the structure arranged therein can dissipate heat through the first heat dissipation hole, and the second heat dissipation pipe is provided with a second heat dissipation hole, so that the second heat dissipation pipe and the structure arranged therein can dissipate heat through the second heat dissipation hole. At the same time, by arranging the first heat dissipation pipe and the second heat dissipation pipe in cooperation, when the second heat dissipation pipe moves relative to the first heat dissipation pipe, the first heat dissipation pipe and the second heat dissipation pipe can be connected through the first heat dissipation hole and the second heat dissipation hole, so as to further improve the heat dissipation effect of the electric push rod. More importantly, the second mounting cavity of the first heat dissipation pipe can be connected with the first mounting cavity of the mounting shell, so as to ensure that the heat generated in the mounting shell can also be dissipated through the first heat dissipation pipe and the second heat dissipation pipe, so as to 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 reduction in service life under high temperature working. 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 reduces the working temperature of the electric push rod, so as to shorten the rest time 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's use experience can be improved.

[0040] Referring to the drawings Figs. 1-3The embodiment provides an electric push rod, which comprises a mounting shell 1 provided with a first mounting cavity; a driving assembly 2 arranged in the first mounting cavity; a first heat dissipation pipe 4 provided with a second mounting cavity communicated with the first mounting cavity, at least one first heat dissipation hole 41 arranged on the side wall of the first heat dissipation pipe 4, and the first heat dissipation hole 41 being communicated with the second mounting cavity; a first end of the first heat dissipation pipe 4 being fixedly connected with the mounting shell 1; a transmission assembly 3 comprising a screw rod 31 and a screw nut 32 matched with each other, a first end of the screw rod 31 being drivingly connected with a driving end of the driving assembly 2, and the screw nut 32 being arranged in the second mounting cavity; a second heat dissipation pipe 5 provided with a third mounting cavity 52 and sleeved with the first heat dissipation pipe 4 on the outside, at least one second heat dissipation hole 51 being arranged on the side wall of the second heat dissipation pipe 5, and the second heat dissipation hole 51 being communicated with the third mounting cavity 52; a first end of the second heat dissipation pipe 5 being fixedly connected with the screw nut 32, and a second end of the screw rod 31 extending into the third mounting cavity 52 after penetrating through the screw nut 32; a heat dissipation path of the structure in the first heat dissipation pipe 4 being out of the first heat dissipation hole 41 after passing through the second mounting cavity; a heat dissipation path of the structure in the mounting shell 1 being out of the first heat dissipation hole 41 after sequentially passing through the first mounting cavity and the second mounting cavity; under the action of the driving assembly 2, the screw rod 31 rotates and drives the screw nut 32 to move along the axis direction of the screw rod 31, so as to adjust the distance between the second heat dissipation pipe 5 and the driving assembly 2.

[0041] It should be noted that the first heat dissipation hole 41 is arranged on the side wall of the first heat dissipation pipe 4 in the embodiment, so that the first heat dissipation pipe 4 and the structure arranged in the first heat dissipation pipe 4 can dissipate heat through the first heat dissipation hole 41, the second heat dissipation hole 51 is arranged on the second heat dissipation pipe 5, so that the second heat dissipation pipe 5 and the structure arranged in the second heat dissipation pipe 5 can dissipate heat through the second heat dissipation hole 51; meanwhile, the first heat dissipation pipe 4 and the second heat dissipation pipe 5 are arranged to match each other, so that when the second heat dissipation pipe 5 moves relative to the first heat dissipation pipe 4, the first heat dissipation pipe 4 and the second heat dissipation pipe 5 can be communicated through the first heat dissipation hole 41 and the second heat dissipation hole 51, so as to further improve the heat dissipation effect of the electric push rod; more importantly, the second mounting cavity of the first heat dissipation pipe 4 can be communicated with the first mounting cavity of the mounting shell 1, so as to ensure that the heat generated in the mounting shell 1 can also be dissipated through the first heat dissipation pipe 4 and the second heat dissipation pipe 5, so as to 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 large reduction in service life under high-temperature working conditions; compared with the rest time of the existing electric push rod, the 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, thereby improving the working efficiency of the electric push rod and the user experience on the basis of ensuring the service life of the electric push rod and reducing the preparation cost.

[0042] In the embodiment, the mounting shell 1 comprises an upper cover 11, a base 12 and a motor shell 13, the upper cover 11 and the base 12 are detachably connected, and the motor shell 13 is detachably connected with the base 12; after the upper cover 11, the base 12 and the motor shell 13 are connected, a first mounting cavity is formed, and the driving assembly 2 is arranged in the first mounting cavity.

[0043] Specifically, the driving assembly 2 comprises 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 shell 13; the gear assembly 21 is sleeved on the first end of the lead screw 31, and the first end of the lead screw 31 can move synchronously with the gear assembly 21.

[0044] Specifically, the mounting shell 1 is provided with a first lug seat and a second lug seat matched with each other at the end away from the first heat dissipation pipe 4.

[0045] In the embodiment, the specific structure of the gear assembly 21 is not limited, as long as the gear assembly 21 can drive the lead screw 31 to rotate under the driving of the driving motor 22.

[0046] In the embodiment, the first mounting cavity is communicated with the second mounting cavity, so that the structure arranged in the first heat dissipation pipe 4 and the structure arranged in the mounting shell 1 can be cooled; the cooling path of the structure in the mounting shell 1 is cooling from the first mounting cavity to the second mounting cavity and the first heat dissipation hole 41 in sequence, and the cooling path of the structure in the first heat dissipation pipe 4 is cooling from the second mounting cavity to the first heat dissipation hole 41.

[0047] In the embodiment, the shapes and lengths of the first heat dissipation pipe 4 and the second heat dissipation pipe 5 are not limited, as long as they can be matched with each other to realize the function of the electric push rod; preferably, the cross sections of the first heat dissipation pipe 4 and the second heat dissipation pipe 5 are circular.

[0048] In the embodiment, there is a gap between the outer wall of the lead screw 31 and the first heat dissipation pipe 4, so that the cooling effect can be ensured on the basis of stable operation of the lead screw 31.

[0049] In the embodiment, the length of the lead screw 31 is longer than the length of the first heat dissipation pipe 4.

[0050] In the embodiment, the first heat dissipation pipe 4 and the second heat dissipation pipe 5 are both aluminum profiles.

[0051] In some possible embodiments, when the first heat dissipation pipe 4 moves relative to the second heat dissipation pipe 5, the second heat dissipation hole 51 on the second heat dissipation pipe 5 can be intermittently communicated with the first heat dissipation hole 41 on the first heat dissipation pipe 4, and the heat dissipation path of the structure in the second heat dissipation pipe 5 is out of the second heat dissipation hole 51 after passing through the third mounting cavity 52; and / or, the heat dissipation path of the structure in the second heat dissipation pipe 5 is out of the first heat dissipation hole 41 after passing through the third mounting cavity 52 and the second heat dissipation hole 51 in sequence, by intermittently communicating the second heat dissipation hole 51 on the second heat dissipation pipe 5 with the first heat dissipation hole 41 on the first heat dissipation pipe 4, it can be guaranteed that part of the second heat dissipation pipe 5 accommodated in the first heat dissipation pipe 4 can also be heat dissipated through the second heat dissipation hole 51 and the first heat dissipation hole 41, so that the heat dissipation effect of the part of the second heat dissipation pipe 5 accommodated in the first heat dissipation pipe 4 can be guaranteed, and the heat dissipation effect of the entire electric push rod can be improved.

[0052] In some possible embodiments, the first heat dissipation hole 41 is at least one of a circular hole, an elliptical hole or a long strip hole, and the second heat dissipation hole 51 is at least one of a circular hole, an elliptical hole or a long strip hole.

[0053] In some possible embodiments, when the first heat dissipation hole 41 and the second heat dissipation hole 51 are both circular holes, 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 interval between the two to be the same, it can be guaranteed that at least two first heat dissipation holes 41 on the first heat dissipation pipe 4 and at least two second heat dissipation holes 51 on the second heat dissipation pipe 5 can be reached multiple times during the movement of the second heat dissipation pipe 5 relative to the first heat dissipation pipe 4, so that the heat generated by the second heat dissipation pipe 5 and the structure arranged in the second heat dissipation pipe 5 can be quickly dissipated, and the heat dissipation effect can be improved.

[0054] In the embodiment, after the first heat dissipation pipe 4 and the second heat dissipation pipe 5 are relatively mounted, the axes of the corresponding first heat dissipation hole 41 and the second heat dissipation hole 51 are arranged in parallel.

[0055] In the embodiment, the shape and size of the first heat dissipation hole 41 are not limited, and the shape and size of the second heat dissipation hole 51 are not limited, as long as heat dissipation can be achieved through the first heat dissipation hole 41 and the second heat dissipation hole 51.

[0056] In the embodiment, the first heat dissipation hole 41 can be a circular hole, an elliptical hole or a long strip hole, the second heat dissipation hole 51 can be a circular hole, an elliptical hole or a long strip hole, and the shapes of the first heat dissipation hole 41 and the second heat dissipation hole 51 are the same or different.

[0057] In some possible embodiments, one of the first heat dissipation holes 41 on the first heat dissipation pipe 4 or the second heat dissipation holes 51 on the second heat dissipation pipe 5 is a round hole, and the other is a long strip hole. By not limiting the shape of the heat dissipation hole, the first heat dissipation pipe 4 and the second heat dissipation pipe 5 can be combined to have different heat dissipation areas and achieve different heat dissipation effects, so as to adapt to different heat dissipation requirements, improve the user experience, and improve the market share.

[0058] In the embodiment, the first heat dissipation hole 41 and the second heat dissipation hole 51 are both round holes, and the diameter of the round hole is 100%-200% of the wall thickness of the first heat dissipation pipe 4, so as to improve the heat dissipation effect on the basis of ensuring the strength of the first heat dissipation pipe 4 or the second heat dissipation pipe 5.

[0059] In some possible embodiments, when the heat dissipation hole is a long strip hole, the length of the heat dissipation hole is 60%-90% of the length of the connecting pipe. Setting the range can ensure the strength of the connecting pipe while improving the heat dissipation effect by increasing the heat dissipation area of the heat dissipation hole.

[0060] In some possible embodiments, the first heat dissipation hole 41 is a long strip hole, and the second heat dissipation hole 51 is a round hole. The length of the long strip hole is 60%-90% of the length of the first heat dissipation pipe 4, so as to ensure the strength of the second heat dissipation pipe 5 while improving the heat dissipation effect of the electric push rod.

[0061] In some possible embodiments, the first heat dissipation hole 41 is a round hole, and the second heat dissipation hole 51 is a long strip hole. The length of the long strip hole is 60%-90% of the length of the second heat dissipation pipe 5, so as to ensure the strength of the first heat dissipation pipe 4 while improving the heat dissipation effect of the electric push rod.

[0062] In some possible embodiments, at least one first heat dissipation hole 41 is arranged along the length direction of the first heat dissipation pipe 4, and at least one second heat dissipation hole 51 is arranged along the length direction of the second heat dissipation pipe 5. Such arrangement can ensure that any position of the first heat dissipation pipe 4 can dissipate heat along the length direction of the first heat dissipation pipe 4, thereby ensuring the heat dissipation effect of the first heat dissipation pipe 4. Similarly, any position of the second heat dissipation pipe 5 can dissipate heat along the length direction of the second heat dissipation pipe 5, thereby ensuring the heat dissipation effect of the second heat dissipation pipe 5.

[0063] In some possible embodiments, a micro switch 9 is further included, and the micro switch 9 is arranged in the second mounting cavity. The micro switch 9 is in communication connection with the driving assembly 2, and the micro switch 9 is used to control the stroke of the lead screw 31. By arranging the micro switch 9, the stroke of the lead screw 31 can be monitored in real time, so as to ensure accurate control of the operation of the lead screw 31 and improve the stability and accuracy of the overall structure.

[0064] In some possible embodiments, the second mounting cavity comprises a first sub-mounting cavity 43 and a second sub-mounting cavity 44 which are in communication with each other, the first sub-mounting cavity 43 and the second sub-mounting cavity 44 are both arranged along the length direction of the first heat dissipation pipe 4, and the first sub-mounting cavity 43 and the second sub-mounting cavity 44 are both provided with the first heat dissipation holes 41; the first sub-mounting cavity 43 can accommodate the lead screw 31, the lead screw nut 32 and the second heat dissipation pipe 5; the second sub-mounting cavity 44 can accommodate the micro switch 9; by arranging the first sub-mounting cavity 43 and the second sub-mounting cavity 44 which are in communication with each other, it can be ensured that the structure arranged in the first sub-mounting cavity 43 and the micro switch 9 arranged in the second sub-mounting cavity 44 can both dissipate heat, the maximum heat dissipation area is ensured, and the heat dissipation effect is improved; meanwhile, by arranging the first sub-mounting cavity 43 and the second sub-mounting cavity 44 along the length direction of the first heat dissipation pipe 4, the heat dissipation effect of the structures in the first sub-mounting cavity 43 and the second sub-mounting cavity 44 can be further improved, and more importantly, by arranging the first sub-mounting cavity 43 and the second sub-mounting cavity 44, the micro switch 9 arranged in the second sub-mounting cavity 44 can avoid affecting the operation of the transmission assembly 3 arranged in the first sub-mounting cavity 43, that is, on the basis of ensuring the heat dissipation effect, interference can also be avoided, and the operation stability is improved.

[0065] In the embodiment, the shapes of the first sub-mounting cavity 43 and the second sub-mounting cavity 44 are not limited, and can be limited according to actual conditions.

[0066] Preferably, the first sub-mounting cavity 43 has a cylindrical structure.

[0067] In the embodiment, the length of the first sub-mounting cavity 43 is consistent with the length of the second sub-mounting cavity 44, which facilitates the preparation of the second heat dissipation pipe 4 and reduces the preparation cost.

[0068] In some possible embodiments, the inner wall of the first heat dissipation pipe 4 is provided with at least one clamping groove 42, and the lead screw nut 32 is provided with at least one first clamping protrusion 321 corresponding to the at least one clamping groove 42; the first heat dissipation pipe 4 is slidably connected with the first clamping protrusion 321 of the lead screw nut 32 through the clamping groove 42; by arranging the clamping groove 42 on the first heat dissipation pipe 4 and arranging the first clamping protrusion 321 on the lead screw nut 32, the lead screw nut 32 and the second heat dissipation pipe 5 connected thereto can be smoothly slid relative to the first heat dissipation pipe 4, and relative rotation between the first heat dissipation pipe 4 and the lead screw nut 32 can be avoided; if the relative rotation occurs, the lead screw 31 cannot move relative to the lead screw nut 32, and avoiding the relative rotation can ensure the stability of the operation of the lead screw 31 and the lead screw nut 32.

[0069] In the embodiment, the number and size of the clamping grooves 42 are not limited, and the number and size of the first clamping protrusions 321 are not limited, and are set according to actual conditions, as long as the clamping grooves 42 and the first clamping protrusions 321 can be slidably connected.

[0070] In the embodiment, the at least one clamping groove 42 is arranged along the circumference of the first heat dissipation pipe 4, and the clamping groove 42 is arranged along the axis direction of the first heat dissipation pipe 4. By arranging the at least one clamping groove 42, the rotation of the screw nut 32 relative to the first heat dissipation pipe 4 can be further avoided, and the stability of the operation of the screw rod 31 and the screw nut 32 can be further ensured.

[0071] In some possible embodiments, the second end of the first heat dissipation pipe 4 is provided with an end cover 6, the cross-sectional shape of the end cover 6 is the same as that of the first heat dissipation pipe 4, and the second heat dissipation pipe 5 is sealingly connected to the first heat dissipation pipe 4 through the end cover 6. By arranging the end cover 6 with the same cross section as the first heat dissipation pipe 4, the sealing performance of the connection position of the first heat dissipation pipe 4 and the second heat dissipation pipe 5 can be ensured, and by arranging the end cover 6, the axis of the second heat dissipation pipe 5 and the screw rod 31 arranged in the first heat dissipation pipe 4 can coincide, so that the stability of the operation of the electric push rod can be ensured.

[0072] In the embodiment, the second end of the second heat dissipation pipe 5 close to the mounting shell 1 is provided with a clamping groove, and a clamping ring 8 is arranged in the clamping groove. The clamping ring 8 is detachably connected to the clamping groove, and after the clamping ring 8 is connected to the clamping groove, part of the clamping ring 8 protrudes from the side wall of the second heat dissipation pipe 5.

[0073] Specifically, the outer side wall of the clamping ring 8 is provided with at least one second clamping protrusion corresponding to the at least one clamping groove 42, and the first heat dissipation pipe 4 is slidably connected to the second heat dissipation pipe 5 through the clamping groove 42.

[0074] In the embodiment, the cross-sectional size of the end cover 6 is smaller than that of the first heat dissipation pipe 4, so that the second heat dissipation pipe 5 can be prevented from falling off the first heat dissipation pipe 4 by arranging the clamping ring 8.

[0075] In the embodiment, the end cover 6 includes a first clamping part and a second clamping part connected to each other. The first clamping part is a shell with two open ends, and the second clamping part is a shell with one open end. The first clamping part is clamped at one end of the first sub-mounting cavity 43, and the second clamping part is clamped at one end of the second sub-mounting cavity 44 and seals the second sub-mounting cavity 44. The diameter of the first clamping part is smaller than the diameter of the first sub-mounting cavity 43, the diameter of the first clamping part is larger than the diameter of the second heat dissipation pipe 5, and the diameter of the first clamping part is smaller than the outer diameter of the clamping ring 8.

[0076] Specifically, the connecting process of the first heat dissipation pipe 4 and the second heat dissipation pipe 5 is as follows: the second end of the second heat dissipation pipe 5 is inserted into the first heat dissipation pipe 4 and extends out, the clamping ring 8 is clamped in the clamping groove, the end cover 6 is fixed on the second end of the first heat dissipation pipe 4, and the first end of the first heat dissipation pipe 4 is fixedly connected with the mounting shell 1.

[0077] In some possible embodiments, the second end of the second heat dissipation pipe 5 is sealingly connected with the connecting piece 7, and the side of the connecting piece 7 away from the second heat dissipation pipe 5 can be connected with an external structure to drive the external structure to move synchronously. By arranging the connecting piece 7, the electric push rod can be connected with the external structure, and the stability of the electric push rod in operation can be ensured.

[0078] In the embodiment, the connecting piece 7 is provided with a connecting position, and the connecting piece 7 is connected with the external structure through the connecting position.

[0079] Embodiment one

[0080] Referring to the accompanying drawings, Figs. 1-3 the embodiment provides an electric push rod, which comprises a mounting shell 1 having a first mounting cavity; a driving assembly 2 arranged in the first mounting cavity; a first heat dissipation pipe 4 having a second mounting cavity in communication with the first mounting cavity, at least one first heat dissipation hole 41 being arranged on the side wall of the first heat dissipation pipe 4 and in communication with the second mounting cavity; a first end of the first heat dissipation pipe 4 being fixedly connected with the mounting shell 1; a transmission assembly 3 comprising a screw rod 31 and a screw nut 32 which cooperate with each other, a first end of the screw rod 31 being drivingly connected with a driving end of the driving assembly 2, and the screw nut 32 being arranged in the second mounting cavity; a second heat dissipation pipe 5 sleeved with the first heat dissipation pipe 4 on the outside and having a third mounting cavity 52, at least one second heat dissipation hole 51 being arranged on the side wall of the second heat dissipation pipe 5 and in communication with the third mounting cavity 52; a first end of the second heat dissipation pipe 5 being fixedly connected with the screw nut 32, and a second end of the screw rod 31 extending into the third mounting cavity 52 after passing through the screw nut 32; a heat dissipation path of the structure in the first heat dissipation pipe 4 being out of the first heat dissipation hole 41 after passing through the second mounting cavity; a heat dissipation path of the structure in the mounting shell 1 being out of the first heat dissipation hole 41 after sequentially passing through the first mounting cavity and the second mounting cavity; under the action of the driving assembly 2, the screw rod 31 rotates and drives the screw nut 32 to move along the axis direction of the screw rod 31, so as to adjust the distance between the second heat dissipation pipe 5 and the driving assembly 2.

[0081] In the embodiment, the mounting shell 1 comprises an upper cover 11, a base 12 and a motor shell 13, the upper cover 11 and the base 12 are detachably connected, and the motor shell 13 is detachably connected with the base 12; after the upper cover 11, the base 12 and the motor shell 13 are connected, a first mounting cavity is formed, and the driving assembly 2 is arranged in the first mounting cavity.

[0082] Specifically, the driving assembly 2 comprises 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 shell 13; the gear assembly 21 is sleeved on the first end of the lead screw 31, and the first end of the lead screw 31 can move synchronously with the gear assembly 21.

[0083] Specifically, the mounting shell 1 is provided with a first lug seat and a second lug seat matched with each other at the end away from the first heat dissipation pipe 4.

[0084] In the embodiment, the specific structure of the gear assembly 21 is not limited, as long as the gear assembly 21 can drive the lead screw 31 to rotate under the driving of the driving motor 22.

[0085] In the embodiment, the micro switch 9 is further included, the micro switch 9 is arranged in the second mounting cavity; the micro switch 9 is in communication connection with the driving assembly 2, and the micro switch 9 is used for controlling the stroke of the lead screw 31.

[0086] In the embodiment, the shapes and lengths of the first heat dissipation pipe 4 and the second heat dissipation pipe 5 are not limited, as long as the functions of the electric push rod can be realized by cooperation, preferably, the cross sections of the first heat dissipation pipe 4 and the second heat dissipation pipe 5 are circular.

[0087] In the embodiment, the outer wall of the lead screw 31 has a gap with the first heat dissipation pipe 4, so that the heat dissipation effect can be ensured on the basis of stable operation of the lead screw 31.

[0088] In the embodiment, the length of the lead screw 31 is longer than the length of the first heat dissipation pipe 4.

[0089] In the embodiment, the first heat dissipation pipe 4 and the second heat dissipation pipe 5 are both aluminum profiles.

[0090] In the embodiment, the second end of the first heat dissipation pipe 4 is provided with an end cover 6, the cross section shape of the end cover 6 is the same as that of the first heat dissipation pipe 4; the second heat dissipation pipe 5 is sealingly connected with the first heat dissipation pipe 4 through the end cover 6.

[0091] In the embodiment, the end close to the mounting shell 1 of the second heat dissipation pipe 5, i.e. the second end of the second heat dissipation pipe 5 is provided with a clamping groove, a clamping ring 8 is arranged in the clamping groove, the clamping ring 8 is detachably connected with the clamping groove, and part of the clamping ring 8 protrudes from the side wall of the second heat dissipation pipe 5 after being connected with the clamping groove.

[0092] Specifically, at least one second clamping protrusion is arranged on the outer side wall of the clamping ring 8, the first heat dissipation pipe 4 is slidingly matched with the second heat dissipation pipe 5 through the clamping groove 42.

[0093] In the embodiment, the cross-sectional dimension of the end cover 6 is smaller than that of the first heat dissipation pipe 4, so that the second heat dissipation pipe 5 can be prevented from falling off the first heat dissipation pipe 4 by arranging the clamping ring 8.

[0094] In the embodiment, the end cover 6 comprises a first clamping part and a second clamping part connected with each other, the first clamping part is a shell with both ends open, the second clamping part is a shell with one end open, the first clamping part is clamped at one end of the first sub-mounting cavity 43, the second clamping part is clamped at one end of the second sub-mounting cavity 44, and the second sub-mounting cavity 44 is sealed; the diameter of the first clamping part is smaller than that of the first sub-mounting cavity 43, the diameter of the first clamping part is larger than that of the second heat dissipation pipe 5, and the diameter of the first clamping part is smaller than the outer diameter of the clamping ring 8.

[0095] Specifically, the connection process of the first heat dissipation pipe 4 and the second heat dissipation pipe 5 is as follows: the second end of the second heat dissipation pipe 5 is inserted into the first heat dissipation pipe 4 and extends out, the clamping ring 8 is clamped in the clamping groove, the end cover 6 is fixed on the second end of the first heat dissipation pipe 4, and the first end of the first heat dissipation pipe 4 is fixedly connected with the mounting shell 1.

[0096] In the embodiment, the second end of the second heat dissipation pipe 5 is sealingly connected with the connecting piece 7, and the side of the connecting piece 7 away from the second heat dissipation pipe 5 can be connected with an external structure to drive the external structure to move synchronously.

[0097] In the embodiment, the connecting piece 7 is provided with a connecting position, and the connecting piece 7 is connected with the external structure through the connecting position.

[0098] In the embodiment, when the first heat dissipation pipe 4 moves relative to the second heat dissipation pipe 5, the second heat dissipation holes 51 on the second heat dissipation pipe 5 can intermittently communicate with the first heat dissipation holes 41 on the first heat dissipation pipe 4, and the heat dissipation path of the structure in the second heat dissipation pipe 5 is out of the second heat dissipation holes 51 after passing through the third mounting cavity 52; and / or the heat dissipation path of the structure in the second heat dissipation pipe 5 is out of the first heat dissipation holes 41 after passing through the third mounting cavity 52 and the second heat dissipation holes 51 in sequence.

[0099] In the embodiment, the heat dissipation path of the structure in the first heat dissipation pipe 4 is out of the first heat dissipation holes 41 after passing through the second mounting cavity; and the heat dissipation path of the structure in the mounting shell 1 is out of the first heat dissipation holes 41 after passing through the first mounting cavity and the second mounting cavity in sequence.

[0100] In the embodiment, when the first heat dissipation holes 41 and the second heat dissipation holes 51 are both circular holes, the interval between adjacent two first heat dissipation holes 41 is the same as the interval between adjacent two second heat dissipation holes 51.

[0101] In the embodiment, the first heat dissipation pipe 4 and the second heat dissipation pipe 5 are oppositely installed, and the axes of the corresponding first heat dissipation hole 41 and the second heat dissipation hole 51 are arranged in parallel.

[0102] In the embodiment, the shape and size of the first heat dissipation hole 41 are not limited, and the shape and size of the second heat dissipation hole 51 are not limited, as long as the heat dissipation through the first heat dissipation hole 41 and the second heat dissipation hole 51 can be ensured.

[0103] In the embodiment, the first heat dissipation hole 41 is at least one of a circular hole, an elliptical hole or a long strip hole, and the second heat dissipation hole 51 is at least one of a circular hole, an elliptical hole or a long strip hole; one of the first heat dissipation hole 41 on the first heat dissipation pipe 4 or the second heat dissipation hole 51 on the second heat dissipation pipe 5 is a circular hole, and the other is a long strip hole; in the case that the heat dissipation hole is a long strip hole, the length of the heat dissipation hole is 60%-90% of the length of the connecting pipe.

[0104] In the embodiment, the first heat dissipation hole 41 and the second heat dissipation hole 51 are both circular holes, and the diameter of the circular hole is 100%-200% of the wall thickness of the first heat dissipation pipe 4, so that the strength of the first heat dissipation pipe 4 or the second heat dissipation pipe 5 can be ensured on the basis of improving the heat dissipation effect.

[0105] In the embodiment, at least one first heat dissipation hole 41 is arranged along the length direction of the first heat dissipation pipe 4, and at least one second heat dissipation hole 51 is arranged along the length direction of the second heat dissipation pipe 5.

[0106] In the embodiment, the second installation cavity includes a first sub-installation cavity 43 and a second sub-installation cavity 44 which are in communication with each other, the first sub-installation cavity 43 and the second sub-installation cavity 44 are both arranged along the length direction of the first heat dissipation pipe 4, and the first heat dissipation hole 41 is arranged on the first sub-installation cavity 43 and the second sub-installation cavity 44; the first sub-installation cavity 43 can accommodate the lead screw 31, the lead screw nut 32 and the second heat dissipation pipe 5; and the second sub-installation cavity 44 can accommodate the micro switch 9.

[0107] In the embodiment, the shape of the first sub-installation cavity 43 and the second sub-installation cavity 44 is not limited, and can be limited according to the actual situation.

[0108] Preferably, the first sub-installation cavity 43 has a cylindrical structure.

[0109] In the embodiment, the length of the first sub-installation cavity 43 is consistent with the length of the second sub-installation cavity 44.

[0110] In the embodiment, at least one clamping groove 42 is arranged on the inner wall of the first heat dissipation pipe 4, and at least one first clamping protrusion 321 corresponding to the at least one clamping groove 42 is arranged on the lead screw nut 32; the first heat dissipation pipe 4 is slidably connected with the first clamping protrusion 321 of the lead screw nut 32 through the clamping groove 42.

[0111] In the embodiment, the number and size of the clamping grooves 42 are not limited, and the number and size of the first clamping protrusions 321 are not limited, and are specifically set according to actual conditions, as long as the clamping grooves 42 and the first clamping protrusions 321 can be slidably matched.

[0112] In the embodiment, the at least one clamping groove 42 is arranged along the circumference of the first heat dissipation pipe 4, and the clamping groove 42 is arranged along the axis direction of the first heat dissipation pipe 4.

[0113] The above has described the embodiments of the present application, and the above description is exemplary, is not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes are obvious to those skilled in the art without departing from the scope and spirit of the described embodiments. The selection of the terms used herein is intended to best explain the principles of the embodiments, practical application, or improvement of the technology in the market, or to enable other ordinary skilled persons in the art to understand the embodiments disclosed herein.

[0114] In the case of no conflict, the above-described embodiments and features in the embodiments can be combined with each other.

[0115] The above disclosure is only a preferred embodiment of the utility model, of course, cannot limit the scope of the utility model, therefore, the equivalent changes made according to the utility model claims still belong to the scope covered by the utility model.

Claims

1. An electric trolley characterized in that, The application relates to a heat dissipation device. The application relates to a heat dissipation device. The application relates to a heat dissipation device. The application relates to a heat dissipation device. The application relates to a heat dissipation device. The application relates to a heat dissipation device. The application relates to a heat dissipation device. The application relates to a heat dissipation device. The application relates to a heat dissipation device.

2. The motorized push rod of claim 1, wherein, The application relates to a heat dissipation device. The application relates to a heat dissipation device. The application relates to a heat dissipation device.

3. The motorized push rod of claim 1, wherein, The application relates to a heat dissipation device.

4. The motorized push rod of claim 3, wherein, The application relates to a heat dissipation device.

5. The motorized push rod of claim 1, wherein, The application relates to a heat dissipation device. The application relates to a heat dissipation device. The application relates to a heat dissipation device. The application relates to a heat dissipation device. The application relates to a heat dissipation device. The application relates to a heat dissipation device. The application relates to a heat dissipation device. The application relates to a heat dissipation device. The application relates to a heat dissipation device. The application relates to a heat dissipation device. The application relates to a heat dissipation device. The application relates to a heat dissipation device. The application relates to a heat dissipation device. The application relates to a heat dissipation device. The application relates to a heat dissipation device. The application relates to a heat dissipation device. The application relates to a heat dissipation device. 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7. The motorized push rod of claim 6, wherein, The second mounting cavity comprises a first sub-mounting cavity (43) and a second sub-mounting cavity (44) in communication with each other, the first sub-mounting cavity (43) and the second sub-mounting cavity (44) are arranged along the length direction of the first heat dissipation pipe (4), and the first sub-mounting cavity (43) and the second sub-mounting cavity (44) are provided with the first heat dissipation hole (41); The first sub-mounting cavity (43) can accommodate the lead screw (31), the lead screw nut (32) and the second heat dissipation pipe (5); The second sub-mounting cavity (44) can accommodate the micro switch (9).

8. The electric push rod according to any one of claims 1 to 7, characterized in that At least one clamping groove (42) is arranged on the inner wall of the first heat dissipation pipe (4), and at least one first clamping protrusion (321) corresponding to the at least one clamping groove (42) is arranged on the lead screw nut (32); The first heat dissipation pipe (4) is in sliding fit with the first clamping protrusion (321) of the lead screw nut (32) through the clamping groove (42).

9. The electric push rod according to any one of claims 1 to 7, characterized in that The second end of the first heat dissipation pipe (4) is provided with an end cover (6), and the cross-sectional shape of the end cover (6) is the same as that of the first heat dissipation pipe (4); The second heat dissipation pipe (5) is in sealed connection with the first heat dissipation pipe (4) through the end cover (6).

10. The electric push rod according to any one of claims 1 to 7, characterized in that The second end of the second heat dissipation pipe (5) is in sealed connection with a connecting piece (7), and the side of the connecting piece (7) away from the second heat dissipation pipe (5) can be connected with an external structure to drive the external structure to move synchronously.

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