CN209705157U - A temperature-sensitive and pressure-automatically balanced piston spring - Google Patents

Abstract

The utility model discloses a kind of temperature-sensitive automatic pressure-balancing piston springs, it include: piston sleeve and piston rod, one end of piston rod is protruded into piston sleeve, the end that piston rod protrudes into piston sleeve is further fixed on piston head, the outer rim of piston head is mutually agreed with piston sleeve inner wall, centre bore is formed in the middle part of piston head, a mechanical spring is further fixed on the end alignment centre bore of piston rod and end face, the end that mechanical spring is located remotely from piston rod side is fixed with a sliding valve core, one end on centre bore inner sidewall far from piston rod forms a snap ring, a temperature sensing spring is also socketed on the outside of sliding valve core, one end of temperature sensing spring is fixed on sliding valve core lower part.The utility model improves compressing force when low temperature, ensure that the maintenance of lifting force at low ambient temperatures.

Description

A temperature-sensitive and pressure-automatically balanced piston spring

technical field

The utility model relates to the technical field of gas springs, in particular to a temperature-sensing and pressure-automatically balancing piston spring.

Background technique

Generally, as the ambient temperature changes, the lifting force of the gas spring will change accordingly. Especially in a low temperature environment, the elastic force of the gas spring will continue to decrease until the load cannot be lifted or the load will sag.

Utility model content

The purpose of this utility model is to provide a temperature-sensing pressure automatic balancing piston spring to solve the problems raised in the above-mentioned background technology.

In order to achieve the above purpose, the utility model provides the following technical solutions: a temperature-sensitive pressure automatic balance piston spring, including: a piston sleeve and a piston rod, one end of the piston rod extends into the piston sleeve, and the piston rod extends into the piston sleeve. The end is also fixed with a piston head, the outer edge of the piston head fits with the inner wall of the piston sleeve, the middle part of the piston head is formed with a center hole, the end of the piston rod is aligned with the center hole and a mechanical spring is fixed on the end surface, the mechanical A sliding spool is fixed at the end of the spring far away from the piston rod. A snap ring is formed on the inner wall of the central hole away from the piston rod. A temperature-sensing spring is sleeved on the outside of the sliding spool. One end is fixed on the lower part of the sliding spool, and the other end of the temperature-sensitive spring is fixed on the end face of the snap ring facing the piston rod. There is also an annular sealing ring placement groove on the outer edge of the part, and a sealing ring is arranged in the sealing ring placement groove. The long bottom edge of the placement groove is located on the side of the piston head away from the piston rod, and a first through hole extending to the central hole is also provided on the side wall of the trapezoidal side of the piston head, and a first through hole extending to the central hole is also provided on the side wall of the central hole. The second through hole, the second through hole communicates with the center hole and the sealing ring placement groove, and a third through hole is also provided on the side wall of the sealing ring placement groove, and the third through hole communicates with the sealing ring placement groove and the piston head away from the piston rod. side end.

Preferably, the long bottom of the sealing ring placement groove is larger than the diameter of the sealing ring, and the short bottom of the sealing ring placement groove is smaller than the diameter of the sealing ring.

Preferably, the diameter of the second through hole is smaller than the radius of the sealing ring.

Preferably, the third through hole is opened at a position close to the bevel on the long bottom side of the sealing ring placement groove.

As a preference, the bottom of the sliding valve core is formed with a bottom plate, the bottom plate is in the shape of a round cake matching the central hole, the end of the mechanical spring away from the piston head is fixed on the end surface of the bottom plate facing the piston rod, and the end of the temperature-sensitive spring is close to the piston head. It is fixed on the end face of the base plate facing away from the piston rod.

Preferably, at normal temperature, the sliding valve core is in the open position of the valve port of the sliding valve core under the action of the elastic force of the temperature-sensing spring and the mechanical spring, and when the temperature is lower than 0°C to 20°C, the elastic force of the temperature-sensing spring is less than The valve port of the sliding spool is closed by the elastic force of the mechanical spring.

Compared with the prior art, the beneficial effect of the utility model is: when the utility model is in a normal temperature state, the temperature-sensing spring and the mechanical spring act on the bottom plate of the sliding valve core at the same time, so that the valve port of the sliding valve core is always in an open state , the channel of the utility model is unblocked, and it is consistent with the ordinary gas spring when used. When it is in a low temperature state, the elastic force of the temperature-sensing spring decreases, so that the sliding valve core moves toward the side away from the piston rod, thereby closing the valve port of the sliding valve core. When the utility model is stretched, the gas or oil will move along the path of the first through hole, the second through hole and the third through hole, so that the lifting force is consistent with that of the ordinary gas spring. When the utility model is compressed, the sealing The ring is pushed to the side of the short bottom edge of the sealing ring placement groove by pressure, thereby closing the port where the second through hole is located in the sealing ring placement groove, so that the paths of the first through hole, the second through hole and the third through hole are closed, thereby The compression force at low temperature is increased to ensure the maintenance of lifting force in low temperature environment.

Description of drawings

Fig. 1 is the structural representation of the utility model.

In the figure: 1 is the piston sleeve, 2 is the piston rod, 3 is the piston head, 4 is the mechanical spring, 5 is the sliding valve core, 6 is the clasp, 7 is the temperature spring, 8 is the sealing ring placement groove, 9 is the Sealing ring, 10 is the first through hole, 11 is the second through hole, 12 is the third through hole, 13 is the bottom plate.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. example. Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

Please refer to Fig. 1, the utility model provides a kind of temperature-sensitive pressure automatic balance piston spring, comprising: piston sleeve 11 and piston rod 2, one end of piston rod 2 extends into piston sleeve 1, and piston rod 2 extends into piston sleeve The end of the tube 1 is also fixed with a piston head 3, the outer edge of the piston head 3 fits the inner wall of the piston sleeve 1, the middle part of the piston head 3 is formed with a center hole, the end of the piston rod 2 is aligned with the center hole and the end surface A mechanical spring 4 is also fixed, and the end of the mechanical spring 4 located on the side away from the piston rod 2 is fixed with a sliding valve core 5, and a snap ring 6 is formed on the inner wall of the center hole away from the end of the piston rod 2, and the sliding valve core 5 is also sleeved with a temperature-sensing spring 7, one end of the temperature-sensing spring 7 is fixed on the lower part of the sliding valve core 5, the other end of the temperature-sensing spring 7 is fixed on the end face of the clasp 6 facing the side of the piston rod 2, and the piston head 3 The cross-section of the side facing the piston rod 2 is trapezoidal, and the piston head 3 is located on the outer edge of the end of the side away from the piston rod 2. An annular sealing ring placement groove 8 is also provided, and the sealing ring placement groove 8 is provided with The sealing ring 9, the cross section of the sealing ring placement groove 8 is a right angle trapezoid, the right angle side of the sealing ring placement groove 8 is the opening side, the long bottom edge of the sealing ring placement groove 8 is located on the side of the piston head 3 away from the piston rod 2, the piston The side wall of the trapezoidal side of the head 3 is also provided with a first through hole 10 extending to the central hole, and a second through hole 11 is also provided on the side wall of the central hole, and the second through hole 11 communicates with the central hole and the central hole. The seal ring placement groove 8 is provided with a third through hole 12 on the side wall of the seal ring placement groove 8, and the third through hole 12 communicates with the seal ring placement groove 8 and the end surface of the piston head 3 away from the piston rod 2 side.

The long base of the seal ring placement groove 8 is greater than the diameter of the seal ring 9 , and the short base of the seal ring placement groove 8 is smaller than the diameter of the seal ring 9 .

The diameter of the second through hole 11 is smaller than the radius of the sealing ring 9 .

The third through hole 12 is opened at the long bottom side of the sealing ring placement groove 8 near the oblique position.

The bottom of the sliding spool 5 is formed with a bottom plate 13, which is in the shape of a round cake matching the central hole. The end of the mechanical spring 4 away from the piston head 3 is fixed on the end surface of the bottom plate 13 facing the side of the piston rod 2. The temperature-sensitive spring 7 One end close to the piston head 3 is fixed to the end surface of the bottom plate 13 facing away from the piston rod 2 .

At room temperature, the sliding valve core 5 is in the open position of the valve port of the sliding valve core 5 under the elastic force of the temperature-sensing spring 7 and the mechanical spring 4, and the elastic force of the temperature-sensing spring 7 is smaller than that of the mechanical spring when the temperature is lower than 0°C to 20°C The valve port of sliding spool 5 is closed after the elastic force of 4.

The working principle is: at normal temperature, the temperature-sensitive spring 7 and the mechanical spring 4 act on the bottom plate 13 of the sliding valve core 5 at the same time, so that the valve port of the sliding valve core 5 is always in the open state, which is consistent with ordinary gas springs when used, in the position of In the low temperature state, the elastic force of the temperature-sensing spring 7 is smaller than that of the mechanical spring 4, so that the sliding valve core 5 moves toward the side away from the piston rod 2, thereby closing the valve port of the sliding valve core 5. At this time, when the embodiment stretches, The gas or oil will move along the path of the first through hole 10, the second through hole 11, and the third through hole 12, so that the lifting force is consistent with that of an ordinary gas spring. When this embodiment is compressed, the sealing ring 9 is pushed by the pressure. To the short bottom side of the sealing ring placement groove 8, thereby closing the second through hole 11 at the port of the sealing ring placement groove 8, so that the path of the first through hole 10, the second through hole 11, and the third through hole 12 is closed , so as to improve the compression force at low temperature and ensure the maintenance of lifting force in low temperature environment.

In the description of the present utility model, it should be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "other end", "upper", "one side", " The orientation or positional relationship indicated by "top", "inner", "front", "central", "both ends" etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description , rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as limiting the utility model.

In this utility model, unless otherwise clearly specified and limited, terms such as "installation", "setting", "connection", "fixation" and "rotation" should be understood in a broad sense, for example, it may be a fixed connection, It can also be detachable connection, or integrated; it can be mechanical connection or electrical connection; it can be directly connected or indirectly connected through an intermediary, and it can be the internal communication of two components or the interaction of two components Unless otherwise clearly defined, those skilled in the art can understand the specific meanings of the above terms in the present utility model according to specific situations.

Although the embodiments of the present invention have been shown and described, those skilled in the art can understand that various changes and modifications can be made to these embodiments without departing from the principle and spirit of the present invention , replacements and modifications, the scope of the present utility model is defined by the appended claims and their equivalents.

Claims (6)

1. A temperature-sensitive pressure automatic balancing piston spring, comprising: a piston bushing and a piston rod, one end of the piston rod stretches into the piston bushing, and the end of the piston rod stretching into the piston bushing is also fixed with a piston head , characterized in that: the outer edge of the piston head fits the inner wall of the piston sleeve, the middle part of the piston head is formed with a central hole, the end of the piston rod is aligned with the central hole and a mechanical A spring, the end of the mechanical spring located away from the piston rod is fixed with a sliding valve core, a snap ring is formed on the inner wall of the central hole away from the piston rod, and the outer side of the sliding valve core is also sleeved with a A temperature-sensing spring, one end of the temperature-sensing spring is fixed on the lower part of the sliding valve core, the other end of the temperature-sensing spring is fixed on the end face of the clasp facing the side of the piston rod, and the side of the piston head facing the piston rod The cross-section is trapezoidal, the piston head is located on the outer edge of the end away from the piston rod, and an annular sealing ring placement groove is also provided, and a sealing ring is arranged in the sealing ring placement groove, and the sealing ring is placed The cross-section of the groove is a right-angled trapezoid, the right-angle side of the sealing ring placement groove is the opening side, the long bottom edge of the sealing ring placement groove is located on the side of the piston head away from the piston rod, and the trapezoidal side of the piston head is A first through hole extending to the central hole is also opened on the side wall of the central hole, and a second through hole is also opened on the side wall of the central hole, and the second through hole communicates with the central hole and the sealing ring placement groove, so A third through hole is also provided on the side wall of the sealing ring placement groove, and the third through hole communicates with the sealing ring placement groove and the end surface of the piston head away from the piston rod. 2. A temperature-sensitive pressure automatic balancing piston spring according to claim 1, characterized in that: the long bottom of the sealing ring placement groove is larger than the diameter of the sealing ring, and the short bottom of the sealing ring placement groove is smaller than The diameter of the seal ring. 3 . The temperature-sensing and pressure-automatically balancing piston spring according to claim 1 , wherein the diameter of the second through hole is smaller than the radius of the sealing ring. 4 . 4 . The temperature-sensing and pressure-automatically balancing piston spring according to claim 1 , wherein the third through hole is opened at a position close to the oblique angle of the long bottom of the sealing ring placement groove. 5 . 5. A temperature-sensitive and pressure-automatically balanced piston spring according to claim 1, characterized in that: the bottom of the sliding valve core is formed with a bottom plate, and the bottom plate is in the shape of a round cake that fits the central hole, and the mechanical The end of the spring away from the piston head is fixed on the end surface of the bottom plate facing the piston rod, and the end of the temperature-sensing spring close to the piston head is fixed on the end surface of the bottom plate facing away from the piston rod. 6. A temperature-sensing pressure automatic balancing piston spring according to claim 1, characterized in that: at normal temperature, the sliding spool is in the position of the sliding spool under the action of the elastic force of the temperature-sensing spring and the elastic force of the mechanical spring. In the open position of the port, when the temperature is lower than 0°C to 20°C, the elastic force of the temperature-sensing spring is smaller than that of the mechanical spring, and the valve port of the sliding valve core is closed.