阅读说明：本技术 过载保护器和电动撑杆 (Overload protector and electric stay bar ) 是由 尹燕军 于 2019-08-27 设计创作，主要内容包括：本发明涉及一种过载保护器和电动撑杆。所述过载保护器包括自内向外依次套接的连接销、抱合件、传动座、弹性调节件和外壳,所述抱合件用于将所述连接销与所述传动座可分离地传动连接,所述弹性调节件用于将所述传动座与所述外壳传动连接,所述连接销具有穿出于所述传动座的连接端,所述连接端用于与所述电动撑杆的电机减速箱传动连接,所述外壳远离所述连接端的一端用于与所述电动撑杆的丝杆传动连接。本发明的过载保护器可实现电动撑杆的过载保护,同时还能使电动撑杆具有较高的同心度,不会产生异响。(The invention relates to an overload protector and an electric stay bar. The overload protector comprises a connecting pin, a locking piece, a transmission seat, an elastic adjusting piece and a shell which are sequentially sleeved from inside to outside, wherein the locking piece is used for detachably and drivingly connecting the connecting pin with the transmission seat, the elastic adjusting piece is used for drivingly connecting the transmission seat with the shell, the connecting pin is provided with a connecting end penetrating out of the transmission seat, the connecting end is used for drivingly connecting with a motor reduction box of the electric support rod, and one end of the shell, which is far away from the connecting end, is used for drivingly connecting with a screw rod of the electric support rod. The overload protector can realize the overload protection of the electric stay bar, and simultaneously, the electric stay bar can have higher concentricity without abnormal sound.)

1. The overload protector is characterized by comprising a connecting pin, a locking piece, a transmission seat, an elastic adjusting piece and a shell which are sequentially sleeved from inside to outside, wherein the locking piece is used for detachably and drivingly connecting the connecting pin with the transmission seat, the elastic adjusting piece is used for drivingly connecting the transmission seat with the shell, the connecting pin is provided with a connecting end penetrating out of the transmission seat, the connecting end is used for drivingly connecting a motor reduction box of the electric support rod, and one end of the shell, which is far away from the connecting end, is used for drivingly connecting a screw rod of the electric support rod.

2. The overload protector according to claim 1, wherein the inner peripheral surface of the housing is provided with a first limiting rib, and the outer peripheral surface of the elastic adjusting member is provided with a first limiting groove engaged with the first limiting rib; and/or the inner peripheral surface of the shell is provided with a first limiting groove, and the outer peripheral surface of the elastic adjusting piece is provided with a first limiting rib matched with the first limiting groove.

3. The overload protector according to claim 1, wherein the outer circumferential surface of the transmission base is provided with a second limiting rib, and the inner circumferential surface of the elastic adjusting member is provided with a second limiting groove matched with the second limiting rib; and/or the outer peripheral surface of the transmission seat is provided with a second limiting groove, and the inner peripheral surface of the elastic adjusting piece is provided with a second limiting rib matched with the second limiting groove.

4. The overload protector according to claim 1, wherein the transmission seat includes a cylinder body with an open end, and an end cap covering the open end of the cylinder body, the end cap is provided with a through hole for the connection end to pass through, and one end of the connection pin away from the connection end abuts against a bottom wall of the cylinder body.

5. The overload protector according to claim 4, wherein the elastic adjusting member includes a sleeve portion sleeved on the outer periphery of the transmission seat, and a limiting portion disposed on the inner periphery of the sleeve portion, and one surface of the bottom wall of the cylinder body, which is far away from the end cover, abuts against the limiting portion.

6. The overload protector according to claim 1, wherein the clasping member is a clasping spring, and a stop portion is provided on an inner circumferential surface of the transmission seat and is in abutting engagement with an end portion of the clasping spring.

7. the overload protector of claim 1, wherein the resilient adjustment member is a cushion gum.

8. The overload protector according to any one of claims 1 to 7, wherein the housing includes an annular limiting plate, a fixing cylinder extending from an outer peripheral edge of the limiting plate toward the connecting end, and a connecting cylinder extending from an inner peripheral edge of the limiting plate away from the connecting end, the fixing cylinder is sleeved on an outer periphery of the elastic adjusting piece, an end surface of the elastic adjusting piece abuts against the limiting plate, and an inner peripheral wall of the connecting cylinder is provided with a spline for being in transmission connection with the screw rod.

9. The overload protector according to claim 8, further comprising a gasket disposed at an end of the elastic adjusting member away from the limiting plate, wherein the housing further comprises a bending portion disposed at an end of the fixing cylinder away from the limiting plate, and the bending portion compresses and fixes the gasket and the elastic adjusting member.

10. An electrically powered stay comprising an overload protector according to any one of claims 1 to 9.

Technical Field

The invention relates to the technical field of automobile accessories, in particular to an overload protector and an electric stay bar.

Background

At present, an electric stay bar used for an automobile tail gate on the market rarely has an overload protection function, and when the automobile tail gate is quickly and manually opened and closed, a motor reduction box and a motor in the stay bar are easily damaged by reverse force. Some of the stay bars with overload protectors can realize overload protection, but due to poor concentricity, the sound pressure level of the stay bar is increased, and serious abnormal sound is generated to influence the performance of the stay bar.

Disclosure of Invention

In view of the above, there is a need to provide an overload protector and an electric stay, wherein the overload protector can protect the electric stay from overload, and the electric stay can have high concentricity without abnormal sound.

The utility model provides an overload protector for electronic vaulting pole, overload protector includes connecting pin, the piece of embracing, transmission seat, elasticity adjusting part and the shell that cup joints in proper order from inside to outside, the piece of embracing be used for with the connecting pin with the detachable transmission of transmission seat is connected, elasticity adjusting part be used for with the transmission seat with the shell transmission is connected, the connecting pin has wear out the link of transmission seat, the link be used for with the motor reduction box transmission of electronic vaulting pole is connected, the shell is kept away from the one end of link be used for with the screw drive of electronic vaulting pole is connected.

The overload protector can be used for an electric support rod, and particularly can be used for an electric support rod of an automobile tail door. When the electric stay bar normally opens and closes the door, the cohesion piece is used for driving and connecting the connecting pin and the transmission seat, the rotating force generated by the output end of the motor reduction box is transmitted to the connecting pin and is transmitted to the screw rod through the transmission seat, the elastic adjusting piece and the shell in sequence, and the electric stay bar is stretched through the rotation of the screw rod; when manual quick switch door, the rotational speed of lead screw is too big, the revolving force of lead screw is in proper order via the shell, elastic adjusting part and transmission seat transmit to the connecting pin on, when the revolving force of lead screw is greater than the cohesion of locking piece to the connecting pin, produce relative motion between connecting pin and the locking piece, the transmission connection disconnection between connecting pin and the transmission seat, overload protection ware is in idle running state this moment, can not transmit the revolving force to motor reduction box, thereby can avoid motor reduction box to move under high load rotational speed and take place to damage, thereby can play fine overload protection effect. And an elastic adjusting part is arranged between the shell and the transmission seat, when the electric stay bar runs, the output end of the motor reduction box and the screw rod can be automatically aligned through the elastic action of the elastic adjusting part per se, the concentricity is improved, the effects of reducing vibration and sound pressure level are achieved, abnormal sound of the electric stay bar can be effectively avoided, and the performance of the electric stay bar is improved.

In one embodiment, the inner circumferential surface of the shell is provided with a first limiting rib, and the outer circumferential surface of the elastic adjusting piece is provided with a first limiting groove matched with the first limiting rib; and/or the inner peripheral surface of the shell is provided with a first limiting groove, and the outer peripheral surface of the elastic adjusting piece is provided with a first limiting rib matched with the first limiting groove.

In one embodiment, the outer circumferential surface of the transmission seat is provided with a second limiting rib, and the inner circumferential surface of the elastic adjusting piece is provided with a second limiting groove matched with the second limiting rib; and/or the outer peripheral surface of the transmission seat is provided with a second limiting groove, and the inner peripheral surface of the elastic adjusting piece is provided with a second limiting rib matched with the second limiting groove.

In one embodiment, the transmission seat comprises a cylinder body with an open end and an end cover covering the open end of the cylinder body, the end cover is provided with a through hole for the connecting end to penetrate out, and one end of the connecting pin, far away from the connecting end, is abutted against the bottom wall of the cylinder body.

In one embodiment, the elastic adjusting part comprises a sleeve part sleeved on the periphery of the transmission seat and a limiting part arranged on the inner periphery of the sleeve part, and one surface of the bottom wall of the cylinder body, which is far away from the end cover, is abutted against the limiting part.

In one embodiment, the locking member is a locking spring, and a stop portion in abutting fit with an end portion of the locking spring is arranged on an inner circumferential surface of the transmission seat.

In one embodiment, the elastic adjusting member is a cushion rubber.

In one embodiment, the shell includes an annular limiting plate, a fixed cylinder extending from the outer periphery of the limiting plate toward the connecting end, and a connecting cylinder extending from the inner periphery of the limiting plate away from the connecting end, the fixed cylinder is sleeved on the periphery of the elastic adjusting piece, the end surface of the elastic adjusting piece abuts against the limiting plate, and the inner peripheral wall of the connecting cylinder is provided with a spline for being in transmission connection with the screw rod.

In one embodiment, the overload protector further includes a gasket disposed at an end of the elastic adjusting member away from the limiting plate, and the housing further includes a bending portion disposed at an end of the fixing cylinder away from the limiting plate, and the bending portion compresses and fixes the gasket and the elastic adjusting member.

An electric stay comprises an overload protector as described above.

Drawings

Fig. 1 is a schematic structural diagram of an overload protector according to an embodiment of the present invention;

Fig. 2 is an exploded view of the overload protector of fig. 1;

fig. 3 is a schematic cross-sectional view of the overload protector of fig. 1;

FIG. 4 is a schematic view of the assembly of the cylinder and the clasping member of the transmission seat;

FIG. 5 is a schematic view of the elastic adjustment member;

FIG. 6 is a schematic cross-sectional view of the housing;

Fig. 7 is a schematic structural diagram of an electric stay according to an embodiment of the present invention.

10. Overload protector, 11, connecting pin, 111, the link end, 12, the piece of embracing, 13, the transmission seat, 131, the barrel, 1311, the spacing muscle of second, 1312, the backstop portion, 132, the end cover, 1321, the perforation, 14, the elasticity regulating part, 141, the portion of cup jointing, 1411, first spacing groove, 1412, the spacing groove of second, 142, spacing portion, 15, the shell, 151, the limiting plate, 152, the fixed cylinder, 1521, first spacing muscle, 1522, the portion of bending, 153, the connecting cylinder, 1531, the spline, 16, the gasket, 20, the outer tube, 30, the interior sleeve pipe, 40, motor reducing gear box, 50, the lead screw.

Detailed Description

To facilitate an understanding of the invention, the invention will now be described more fully with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

it will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. In contrast, when an element is referred to as being "directly on" another element, there are no intervening elements present. The terms "first" and "second" used herein do not denote any particular order or quantity, but rather are used to distinguish one element from another.

As shown in fig. 7, an electric stay bar comprises an outer sleeve 20 and an inner sleeve 30 which are mutually slidably sleeved, a motor is arranged in the outer sleeve 20, a motor reduction box 40, a screw rod 50 and the like are arranged, the motor reduction box 40 is in transmission connection with the screw rod 50 through an overload protector 10, the inner sleeve 30 is in transmission connection with the screw rod 50 through threads, the motor drive screw rod 50 rotates to further realize the telescopic motion of the inner sleeve 30, the overload protection of the electric stay bar can be realized through the overload protector 10, meanwhile, the electric stay bar can have higher concentricity, and abnormal sound can not be generated. The following description will mainly be made with reference to a specific embodiment of the overload protector 10.

Referring to fig. 1 to 3, an overload protector 10 is used for an electric stay. Overload protection ware 10 includes connecting pin 11 that cup joints in proper order from inside to outside, cohesion piece 12, transmission seat 13, elasticity adjusting part 14 and shell 15, cohesion piece 12 is used for being connected the detachable transmission of connecting pin 11 with transmission seat 13, elasticity adjusting part 14 is used for being connected transmission seat 13 and shell 15 transmission, connecting pin 11 has link 111 of wearing out transmission seat 13, link 111 is used for being connected with the output transmission of motor reduction box 40, the one end that link 111 was kept away from to shell 15 is used for being connected with the transmission of lead screw 50.

The overload protector 10 can be used for an electric stay bar, specifically an electric stay bar of a car tail door, and of course, in other embodiments, the overload protector can also be used for cabinet doors, windows and the like of intelligent furniture. Optionally, the outer circumferential surface of the connecting end 111 is provided with a plurality of splines, and the connecting end 111 is connected with the motor reduction gearbox 40 through the splines to ensure the transmission reliability. Likewise, the housing 15 and the lead screw 50 may be connected by spline transmission. The locking piece 12 is sleeved on the periphery of the connecting pin 11, when the stay bar normally operates, the locking piece 12 and the transmission seat 13 are relatively static, and meanwhile, the locking piece 12 can lock the connecting pin 11 tightly, so that the connecting pin 11 and the transmission seat 13 can synchronously rotate; when the stay bar is overloaded, the rotating force applied to the clasping piece 12 by the transmission seat 13 is greater than the clasping force applied to the connecting pin 11 by the clasping piece 12, and the clasping piece 12 and the connecting pin 11 can rotate relatively. The clasping member 12 may be a clasping spring, a torsion spring or other elastic rubber sleeve. The elastic adjusting member 14 can perform the functions of aligning and damping by its own elastic function, and the elastic adjusting member 14 may be a damping rubber.

Specifically, taking an electric stay bar of an automobile tail gate as an example, when the electric stay bar normally opens and closes a door, the clasping piece 12 is used for driving and connecting the connecting pin 11 and the transmission seat 13, the rotating force generated at the output end of the motor reduction box 40 is transmitted to the connecting pin 11 and is transmitted to the screw rod 50 through the transmission seat 13, the elastic adjusting piece 14 and the shell 15 in sequence, and the electric stay bar is stretched through the rotation of the screw rod 50; when the manual quick switch door, the rotational speed of lead screw 50 is too big, the revolving force of lead screw 50 is in proper order via shell 15, elastic adjusting part 14 and transmission seat 13 transmit to connecting pin 11 on, when the revolving force of lead screw 50 is greater than the cohesion of locking part 12 to connecting pin 11, produce relative motion between connecting pin 11 and the locking part 12, the disconnection is connected in the transmission between connecting pin 11 and the transmission seat 13, overload protection ware 10 is in idle running state this moment, can not transmit the revolving force to motor reduction box 40, thereby can avoid motor reduction box 40 to move under high load rotational speed and take place to damage, thereby can play fine overload protection effect. And, be equipped with elastic adjustment piece 14 between shell 15 and transmission seat 13, when electronic vaulting pole operation, elastic adjustment piece 14 accessible self elastic action makes and carries out the automatic aligning between the output of motor reduction box 40 and lead screw 50, improves the concentricity, plays the effect that alleviates vibration, reduces the sound pressure level, can effectively avoid electronic vaulting pole to produce abnormal sound, improves the performance of electronic vaulting pole.

Referring to fig. 5 and fig. 6, in one embodiment, the inner circumferential surface of the housing 15 is provided with a first limiting rib 1521, and the outer circumferential surface of the elastic adjusting member 14 is provided with a first limiting groove 1411 matched with the first limiting rib 1521. Through the cooperation of first spacing muscle 1521 and first spacing groove 1411, can conveniently assemble shell 15 and elastic adjustment piece 14 in an organic whole, simultaneously, still can guarantee not to produce relative motion between shell 15 and the elastic adjustment piece 14 to guarantee the reliability of transmission connection. Preferably, the inner peripheral surface of shell 15 is provided with a plurality of first spacing muscle 1521 along the even interval of circumference, and correspondingly, the outer peripheral surface of elasticity adjusting part 14 is equipped with a plurality of one-to-one first spacing grooves 1411, so, can further guarantee the reliability of transmission connection, still can guarantee that shell 15 and elasticity adjusting part 14's atress is more even simultaneously to guarantee that electronic vaulting pole rotates more steadily. Of course, the positions of the first position-limiting groove 1411 and the first position-limiting rib 1521 can be interchanged, and the same effect can be achieved, for example, in other embodiments, the inner circumferential surface of the housing 15 is provided with the first position-limiting groove 1411, and the outer circumferential surface of the elastic adjusting member 14 is provided with the first position-limiting rib 1521 matching with the first position-limiting groove 1411. For another example, the inner circumferential surface of the housing 15 may be simultaneously provided with a first limiting rib 1521 and a first limiting groove 1411; the outer peripheral surface of the elastic adjusting piece 14 is simultaneously provided with a first limiting rib 1521 and a first limiting groove 1411 which are alternatively matched when being installed.

Further, referring to fig. 4 and 5, the outer peripheral surface of the transmission seat 13 is provided with a second limiting rib 1311, and the inner peripheral surface of the elastic adjusting member 14 is provided with a second limiting groove 1412 engaged with the second limiting rib 1311. Through the cooperation of the second limiting rib 1311 and the second limiting groove 1412, the transmission seat 13 and the elastic adjusting piece 14 can be conveniently assembled into a whole, and meanwhile, the transmission seat 13 and the elastic adjusting piece 14 can be ensured not to move relatively, so that the reliability of transmission connection is ensured. Preferably, the outer peripheral surface of transmission seat 13 is provided with a plurality of spacing muscle 1311 of second along the even interval of circumference, and correspondingly, the inner peripheral surface of elastic adjustment piece 14 is equipped with a plurality of one-to-one second spacing groove 1412, so, can further guarantee the reliability of transmission connection, still can guarantee simultaneously that transmission seat 13 and elastic adjustment piece 14's atress is more even to it is more steady to guarantee that electronic vaulting pole rotates. Of course, the positions of the second position-limiting groove 1412 and the second position-limiting rib 1311 can be interchanged, and the same effect can be achieved, for example, in other embodiments, the outer peripheral surface of the transmission seat 13 is provided with the second position-limiting groove 1412, and the inner peripheral surface of the elastic adjusting element 14 is provided with the second position-limiting rib 1311 matched with the second position-limiting groove 1412. For another example, the outer peripheral surface of the transmission seat 13 may be simultaneously provided with a first limiting rib 1521 and a first limiting groove 1411; the inner peripheral surface of the elastic adjusting member 14 is simultaneously provided with a first limiting rib 1521 and a first limiting groove 1411, which are alternately matched when being installed.

In one embodiment, as shown in fig. 2 and 3, the transmission seat 13 includes a cylinder 131 with an open end, and an end cover 132 covering the open end of the cylinder 131, the end cover 132 is provided with a through hole 1321 for the connection end 111 to pass through, and an end of the connection pin 11 away from the connection end 111 abuts against a bottom wall of the cylinder 131. The clasping member 12 can be limited in the cylinder 131 by the end cap 132, and the clasping member 12 is prevented from being pulled out from the cylinder 131. The end cap 132 and the cylinder 131 may be fixedly connected by riveting, bonding, or screwing. Optionally, the end cap 132 includes a cover plate pressed on the end surface of the cylinder 131, and an insertion portion disposed on one surface of the cover plate facing the cylinder 131, an outer circumferential surface of the insertion portion is in interference fit with an inner circumferential surface of the cylinder 131, so that the assembly is simple, and the assembly reliability can be ensured.

Further, referring to fig. 3 and 5, the elastic adjusting element 14 includes a sleeve portion 141 sleeved on the periphery of the transmission seat 13, and a limiting portion 142 disposed on the inner periphery of the sleeve portion 141, and one surface of the bottom wall of the cylinder 131, which is far away from the end cover 132, abuts against the limiting portion 142. The movement of the cylinder 131 in the axial direction can be limited by the limiting portion 142, so as to improve the assembling stability between the transmission seat 13 and the elastic adjusting member 14.

Further, as shown in fig. 4, the locking member 12 is a locking spring, and a stopper 1312 that is in abutting engagement with an end of the locking spring is provided on an inner peripheral surface of the transmission base 13. Specifically, after the locking member 12 is assembled into the transmission seat 13, the two ends of the locking member 12 are respectively abutted against the stopping portions 1312, so that relative movement between the locking member 12 and the transmission seat 13 can be effectively prevented, and the reliability of transmission is further ensured.

Referring to fig. 3 and fig. 6, in an embodiment, the housing 15 includes an annular position-limiting plate 151, a fixing tube 152 extending from an outer periphery of the position-limiting plate 151 toward the connecting end 111, and a connecting tube 153 extending from an inner periphery of the position-limiting plate 151 away from the connecting end 111, the fixing tube 152 is sleeved on an outer periphery of the elastic adjusting element 14, an end surface of the elastic adjusting element 14 abuts against the position-limiting plate 151, and an inner peripheral wall of the connecting tube 153 is provided with a spline 1531 for driving connection with the screw 50. The movement of the elastic adjustment member 14 in the axial direction can be limited by the limit plate 151 to improve the assembling stability between the elastic adjustment member 14 and the housing 15.

Further, the overload protector 10 further includes a gasket 16 disposed at an end of the elastic adjusting member 14 away from the limiting plate 151, the housing 15 further includes a bending portion 1522 disposed at an end of the fixing cylinder 152 away from the limiting plate 151, and the gasket 16 and the elastic adjusting member 14 are compressed and fixed by the bending portion 1522. Specifically, before the assembly, the bending portion 1522 is in the state of straightening, after the elastic adjusting piece 14 is installed in the housing 15, the gasket 16 is pressed on the end face of the elastic adjusting piece 14, and then the bending portion 1522 is bent towards the gasket 16 so as to transmit the fixing force to the gasket 16, so that the gasket 16, the elastic adjusting piece 14 and the housing 15 can be fixed, the operation is simple, and the assembly is reliable. Optionally, there are a plurality of bending portions 1522, which can further ensure the assembling stability.

In addition, in an embodiment, the outer peripheral surface of the transmission seat 13 is provided with a second limiting rib 1311, the inner peripheral surface of the elastic adjusting piece 14 is provided with a second limiting groove 1412, when the transmission seat 13 and the elastic adjusting piece 14 are assembled into a whole, the end surface of the second limiting rib 1311 is flush with the end surface of the elastic adjusting piece 14, at this time, the gasket 16 can be simultaneously pressed and connected to the end surfaces of the elastic adjusting piece 14 and the second limiting rib 1311, and then pressed and fixed by the bending portion 1522, so that the gasket 16, the elastic adjusting piece 14, the transmission seat 13 and the housing 15 can be simultaneously fixed, the operation is simple, and the assembly is reliable.

The motorized brace of the present invention includes an overload protector 10 as described above. The specific structure of the overload protector 10 can refer to the above-mentioned embodiment, and since the electric stay bar adopts all the technical solutions of the above-mentioned embodiment, all the beneficial effects brought by the above-mentioned technical solutions are at least achieved, and are not described in detail herein.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

the above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.