Engine system, thermostat and thermostat error prevention device

Abstract

The present invention discloses a thermostat error prevention device, comprising a first transmission shaft and a second transmission shaft connected coaxially; the first transmission shaft is used to connect an actuator and the second transmission shaft is used to connect a radiator valve; a torsional energy storage part sleeved on the second transmission shaft, used to drive the second transmission shaft to rotate to open the radiator valve when releasing the torque; a temperature sensing actuator arranged adjacent to the first transmission shaft; when the temperature of the engine is higher than a preset heat dissipation temperature, the temperature sensing actuator drives the first transmission shaft to move until it is separated from the second transmission shaft to release the torque of the torsional energy storage part. The above-mentioned thermostat error prevention device can open the radiator valve when the actuator of the thermostat fails, reduce the temperature of the engine as soon as possible, and avoid danger to the engine or even the vehicle body. The present invention also discloses a thermostat and an engine system including the above-mentioned thermostat error prevention device.

Description

Technical Field

[0001] The present invention relates to the field of automobile manufacturing, and in particular to a thermostat error prevention device. The present invention also relates to a thermostat and an engine system comprising the thermostat error prevention device. Background Art

[0002] The working principle of the traditional thermostat is that when the temperature inside the engine does not reach the preset heat dissipation temperature, the radiator valve 02 is closed and the small circulation valve 04 is opened, so as to ensure that the engine heats up quickly and reduce heat loss; when the temperature inside the engine rises to the preset heat dissipation temperature, the radiator valve 02 gradually opens and the small circulation valve 04 gradually closes to ensure heat dissipation and cooling of the engine.

[0003] In the above process, once the actuator 01 of the thermostat is damaged or stops working during operation, the actuator 01 cannot drive the transmission shaft to rotate to open the radiator valve 02, or cannot drive the transmission shaft to open the radiator valve 02 to the preset opening, causing the temperature in the engine to continue to rise, and even causing the engine cylinder failure, affecting driving safety. Summary of the invention

[0004] The object of the present invention is to provide a thermostat error prevention device, which can open the heat dissipation valve when the actuator fails or stops working, so as to reduce the temperature inside the engine as soon as possible and avoid engine damage and traffic accidents. Another object of the present invention is to provide a thermostat including the above-mentioned thermostat error prevention device and an engine system including the above-mentioned thermostat.

[0005] To achieve the above object, the present invention provides a thermostat, comprising:

[0006] A first transmission shaft and a second transmission shaft connected coaxially; the first transmission shaft is used to connect the actuator and the second transmission shaft is used to connect the radiator valve;

[0007] A torsional energy storage part sleeved on the second transmission shaft and used for driving the second transmission shaft to rotate when releasing the torque to open the radiator valve;

[0008] A temperature sensing actuator is arranged adjacent to the first transmission shaft; when the temperature of the engine is higher than a preset heat dissipation temperature, the temperature sensing actuator drives the first transmission shaft to move until it is separated from the second transmission shaft to release the torque of the torsional energy storage unit.

[0009] Preferably, the torsional energy storage part includes a coil spring and a coil spring fixing shaft arranged parallel to one side of the second transmission shaft; wherein, one end of the coil spring located in the inner circle is fixedly connected to the second transmission shaft, and the other end of the coil spring located in the outer circle has a curling edge for being sleeved on the coil spring fixing shaft.

[0010] Preferably, the coil spring fixing shaft is fixedly connected to the first transmission shaft.

[0011] Preferably, the temperature sensing actuator includes a temperature sensing element and an actuator connected to the temperature sensing element and used to push the first transmission shaft to move toward one end away from the second transmission shaft when the temperature sensing element detects that the temperature of the engine is higher than a preset heat dissipation temperature; and also includes a compression spring arranged between the first transmission shaft and the actuator.

[0012] Preferably, the temperature sensing element is a temperature sensing wax package; the actuator is a push rod arranged parallel to the first transmission shaft; the first end of the push rod is fixed in a groove in the middle of the temperature sensing wax package, and the second end is against the first transmission shaft.

[0013] Preferably, it also includes a shaft top plate which is sleeved on the first transmission shaft and is used for the second end of the push rod to abut against.

[0014] The present invention also provides a thermostat, comprising an actuator and a radiator valve, and also comprising the thermostat error prevention device as described above.

[0015] The present invention also provides an engine system, comprising the thermostat as described above.

[0016] Preferably, it also includes an indicating unit connected to the thermostat for issuing an early warning when the actuator fails to work normally.

[0017] Preferably, the indicating unit is specifically a display screen for displaying thermostat failure.

[0018] Compared with the above-mentioned background technology, the thermostat error prevention device provided by the present invention is modified on the basis of the original thermostat, and the original transmission shaft is replaced by a coaxially connected first transmission shaft and a second transmission shaft, and the other end of the first transmission shaft is connected to the actuator, and the other end of the second transmission shaft is connected to the radiator valve; when the actuator works normally, the actuator drives the first transmission shaft to rotate, and then drives the second transmission shaft to rotate, so as to realize the opening and closing of the radiator valve; the torsional energy storage part is sleeved on the second transmission shaft, and the temperature sensing actuator is arranged adjacent to the first transmission shaft. When heat dissipation is required and the actuator fails or stops working so that it cannot open the radiator valve or cannot open the radiator valve to a preset opening, causing the temperature in the engine to rise, the temperature sensing actuator drives the first transmission shaft to move to disengage from the second transmission shaft. At this time, the resistance applied by the actuator to the torsional energy storage part disappears, and the torsional energy storage part drives the second transmission shaft to rotate in the process of releasing its own torque to open the radiator valve.

[0019] The above-mentioned thermostat error-proofing device can make a temporary response to open the radiator valve for heat dissipation when the actuator fails or stops working, causing it to be unable to open the radiator valve or unable to open the radiator valve to a preset opening, resulting in the temperature in the engine rising, thereby avoiding greater dangers caused by engine damage and improving driving safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0021] Figure 1 A schematic diagram of the structure of a thermostat provided by an embodiment of the present invention;

[0022] Figure 2 A schematic diagram of the installation of a coil spring and a coil spring fixing shaft provided in an embodiment of the present invention;

[0023] Among them, 01-actuator, 02-radiator valve, 03-radiator pipe, 04-small circulation valve, 05-small circulation pipe, 1-first transmission shaft, 2-second transmission shaft, 21-slit, 3-coil spring, 31-curling edge, 4-coil spring fixing shaft, 5-compression spring, 6-temperature sensitive wax bag, 7-push rod, 8-axis top plate. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] In order to enable those skilled in the art to better understand the scheme of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0026] Please refer to Figure 1 and Figure 2 , Figure 1 A schematic diagram of the structure of a thermostat provided by an embodiment of the present invention; Figure 2 This is a schematic diagram of the installation of a coil spring and a coil spring fixing shaft provided in an embodiment of the present invention.

[0027] The present invention provides a thermostat error prevention device, comprising a first transmission shaft 1 and a second transmission shaft 2 connected coaxially, a torque energy storage unit sleeved on the second transmission shaft 2, and a temperature sensing actuator arranged adjacent to the first transmission shaft 1. The first transmission shaft 1 and the second transmission shaft 2 can be connected by splicing or plugging, as long as it can be ensured that the first transmission shaft 1 can drive the second transmission shaft 2 to rotate when the two are connected.

[0028] When the actuator 01 is working normally, the first transmission shaft 1 and the second transmission shaft 2 are always connected. Once the temperature inside the engine rises to the preset heat dissipation temperature, the actuator 01 drives the first transmission shaft 1 to rotate, and then drives the second transmission shaft 2 to rotate, so that the ball valve hole at the end of the second transmission shaft 2 is connected to the radiator valve hole, thereby dissipating the heat from the engine.

[0029] When the actuator 01 fails to work properly, the temperature inside the engine rises to the preset heat dissipation temperature, and the temperature sensing actuator pulls the first transmission shaft 1 to move at this temperature until the first transmission shaft 1 is separated from the second transmission shaft 2; at this time, the counter torque applied by the actuator 01 to the torsional energy storage unit through the first transmission shaft 1 disappears, and the torsional energy storage unit releases the kinetic energy stored inside, and pulls the second transmission shaft 2 to rotate around the central axis of the second transmission shaft 2 during the rotation, thereby driving the ball valve at the end of the second transmission shaft 2 to rotate, so as to achieve the connection between the ball valve hole and the radiator valve 02 hole, and dissipate heat from the engine. Among them, since the actuator 01 cannot drive the first transmission shaft 1 and the second transmission shaft 2 to rotate to open the radiator valve 02 or cannot drive the first transmission shaft 1 and the second transmission shaft 2 to rotate to open the radiator valve 02 to the preset opening, the temperature inside the engine will rise to the preset heat dissipation temperature. Therefore, the actuator 01 failure to work properly mentioned in this article includes the above two situations.

[0030] The aforementioned preset heat dissipation temperature is usually equal to the maximum protection temperature of the engine. That is to say, when the maximum protection temperature of the engine is set to 110°C, under normal circumstances, the actuator 01 should drive the transmission shaft to rotate when the temperature inside the engine reaches 110°C to achieve full opening of the radiator valve 02; once the actuator 01 fails to work normally, the temperature-sensing actuator will drive the first transmission shaft 1 to move until it is separated from the second transmission shaft 2 when the temperature inside the engine reaches 110°C, thereby canceling the counter-torque applied by the actuator 01 to the torsional energy storage part, and then driving the second transmission shaft 2 to rotate to open the radiator valve 02 to achieve heat dissipation of the engine.

[0031] Compared with the existing thermostat heat dissipation method, the thermostat error-proofing device adds an error-proofing function on the basis of the original heat dissipation method, thereby avoiding greater dangers caused by engine damage and improving driving safety.

[0032] The thermostat error prevention device provided by the present invention is further described below in conjunction with the accompanying drawings and implementation examples.

[0033] The torsional energy storage unit provided in the present application may include a coil spring 3 and a coil spring fixing shaft 4, wherein the coil spring 3 is sleeved on the second transmission shaft 2 and fixedly connected to the second transmission shaft 2; wherein, the end of the coil spring 3 away from the second transmission shaft 2 has a curling edge 31, and the curling edge 31 can be sleeved on the coil spring fixing shaft 4 to fix the outer end of the two ends of the coil spring 3, so that the inner end of the coil spring 3 rotates around the center of the coil spring 3 when released; in other words, one end of the coil spring 3 located in the inner circle is fixedly connected to the second transmission shaft 2, and the other end of the coil spring 3 located in the outer circle is sleeved on the coil spring fixing shaft 4. When the first transmission shaft 1 and the second transmission shaft 2 are separated and the actuator 01 cannot apply a counter-torque to the coil spring 3, the kinetic energy stored in the coil spring 3 due to the tight curling is released. In this process, the second end of the coil spring 3 uses the coil spring fixing shaft 4 as a fixed fulcrum, and the other end of the coil spring 3, that is, the end of the coil spring 3 fixedly connected to the second transmission shaft 2, rotates relative to the center of the coil spring 3 (that is, the central axis of the second transmission shaft 2), thereby driving the second transmission shaft 2 to rotate around its own central axis.

[0034] The middle part of the second transmission shaft 2 is provided with a slit 21 distributed along the diameter and extending along the axial direction of the second transmission shaft 2, and one end of the coil spring 3 located at the inner circle is inserted into the slit 21 and fixedly connected to the slit 21. Obviously, the slit width of the slit 21 is not greater than the thickness of the coil spring 3, and the length of the slit 21 along the axial direction of the second transmission shaft 2 is not less than the width of the coil spring 3.

[0035] Of course, the setting of the torsional energy storage part is not limited to the coil spring 3 and the coil spring fixing shaft 4, and a torsion spring and a torsion spring fixing structure can also be used, as long as it can drive the second transmission shaft 2 to rotate when the actuator 01 fails.

[0036] Considering that the arrangement of the coil spring fixed shaft 4 needs to meet the heat dissipation requirements of the actuator 01 in both normal working and non-normal working states, in simple terms, the coil spring fixed shaft 4 needs to rotate synchronously with the second transmission shaft 2 when the actuator 01 is working normally, and needs to be fixed relative to the second transmission shaft 2 when the actuator 01 is not working normally and needs heat dissipation. In summary, in order to simplify the connection of the coil spring fixed shaft 4, the coil spring fixed shaft 4 is fixedly connected to the first transmission shaft 1, and obviously, the coil spring fixed shaft 4 is parallel to the first transmission shaft 1. When the actuator 01 is working normally, the first transmission shaft 1 is connected to the second transmission shaft 2, and the coil spring fixing shaft 4 and the second transmission shaft 2 both rotate with the rotation of the first transmission shaft 1; when the actuator 01 cannot work normally and needs to dissipate heat, the first transmission shaft 1 and the second transmission shaft 2 are separated. Since the actuator 01 cannot drive the first transmission shaft 1 to rotate, the coil spring fixing shaft 4 cannot rotate either. At this time, the end of the coil spring 3 provided with the curling edge 31 cannot move in space under the operation of the coil spring fixing shaft 4, while the end of the coil spring 3 fixed to the second transmission shaft 2 rotates during the torque release process, thereby driving the second transmission shaft 2 to rotate.

[0037] On the basis of the above embodiment, the temperature sensing actuator may include a temperature sensing element and an actuator connected to the temperature sensing element, which is used to push the first transmission shaft 1 to move toward the end away from the second transmission shaft 2 when the temperature of the engine is higher than the preset heat dissipation temperature; correspondingly, it also includes a compression spring 5 arranged between the first transmission shaft 1 and the actuator 01. When the temperature in the engine is higher than the preset heat dissipation temperature and the actuator 01 is in a state where it cannot work normally, since the compression spring 5 is arranged between the actuator and the first transmission shaft 1, the compression spring 5 can not only ensure the tight fit between the first transmission shaft 1 and the second transmission shaft 2, but also reserve a certain compression space, and the linear distance of the compression space is greater than the working moving distance of the actuator, and the thrust of the actuator is greater than the elastic force of the reserved compression space of the compression spring 5, that is, in addition to providing the first transmission shaft 1 with a reserved space axially away from the second transmission shaft 2, the compression spring 5 can also press the first transmission shaft 1 against the second transmission shaft 2, and will not be disengaged when the actuator 01 is working normally. Therefore, the first transmission shaft 1 can move along the axial direction and in the direction away from the second transmission shaft 2 under the push of the actuator, and finally disengage from the second transmission shaft 2, so that the counter-torque applied by the actuator 01 to the torque storage part, that is, the spring 3 through the first transmission shaft 1 disappears, and then the torque storage part, that is, the spring 3, drives the second transmission shaft 2 to rotate.

[0038] The temperature sensing element may be a temperature sensing wax package 6, and the actuator may be a push rod 7, and the push rod 7 is parallel to the first transmission shaft 1. For example, a wax package 9 may be provided on one side of the first transmission shaft 1, and the cavity of the wax package 9 may be filled with a temperature sensing wax package 6, and the first end of the push rod 7 is fixed in a groove in the middle of the temperature sensing wax package 6, and the first end of the push rod 7 is against the first transmission shaft 1. When the actuator 01 fails to work properly and causes the temperature in the engine to rise to a preset heat dissipation temperature, the temperature sensing wax in the temperature sensing wax package 6 begins to expand and pushes the push rod 7 to move along its axial direction, thereby pushing the first transmission shaft 1 gradually away from the second transmission shaft 2 along its axial direction, and finally realizing the separation of the first transmission shaft 1 and the second transmission shaft 2.

[0039] In order to facilitate the connection between the push rod 7 and the first transmission shaft 1, the thermostat anti-error device also includes a shaft top plate 8 sleeved on the first transmission shaft 1 for the first end of the push rod 7 to abut. The radius of the shaft top plate 8 is greater than the distance between the groove of the temperature-sensitive wax package 6 and the central axis of the first transmission shaft 1, that is, the second end of the push rod 7 presses against the inner end surface of the shaft top plate 8 to prevent the push rod 7 from detaching from the shaft top plate 8 during movement. Furthermore, a push rod fixing hole can be provided on the end surface of the shaft top plate 8 close to the push rod 7. In simple terms, a blind hole can be provided on the end surface of the shaft top plate 8, the diameter of the blind hole matches the diameter of the push rod 7, and the second end of the push rod 7 is placed in the blind hole, thereby preventing the push rod 7 from deviating during movement.

[0040] The present invention also provides a thermostat, comprising an actuator 01 and a radiator valve 02, and also comprising the thermostat error prevention device in any of the above embodiments, wherein the actuator 01 and the radiator valve 02 are respectively connected to the two ends of the first transmission shaft 1 and the second transmission shaft 2, more specifically, the actuator 01 is connected to an end of the first transmission shaft 1 away from the second transmission shaft 2, and the radiator valve 02 is connected to an end of the second transmission shaft 2 away from the first transmission shaft 1.

[0041] Other structures of the thermostat, such as the radiator pipe 03 connected to the radiator valve 02, the small circulation valve 04 symmetrically arranged on the other side of the second transmission shaft 2 with the radiator valve 02, and the small circulation pipe 05 connected to the small circulation valve 04 are the same as those of the existing thermostat and can be set with reference to the setting method of the existing thermostat, and will not be explained one by one here.

[0042] The present invention also provides an engine system, including the above-mentioned thermostat, and obviously also including an engine and other connecting structures and driving structures.

[0043] Preferably, the engine system further comprises an indication unit connected to the thermostat for giving an early warning when the actuator 01 fails to work properly. The indication unit can give an early warning to the driver by means of sound, light or other signal transmission, such as a signal light or an alarm.

[0044] In a specific embodiment, the indicating unit is specifically a display screen. When the actuator 01 fails to work normally, the engine system uses the thermostat error prevention device to temporarily dissipate heat on the one hand, and reminds the driver through the display screen on the other hand, so that the driver can send the vehicle to the maintenance station for maintenance as soon as possible.

[0045] The engine system, thermostat and thermostat error prevention device provided by the present invention are introduced in detail above. Specific examples are used herein to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method of the present invention and its core idea. It should be pointed out that for ordinary technicians in this technical field, without departing from the principle of the present invention, several improvements and modifications can be made to the present invention, and these improvements and modifications also fall within the scope of protection of the claims of the present invention.

Claims

1. A thermostat error prevention device, characterized in that: include: A first transmission shaft (1) and a second transmission shaft (2) connected coaxially; the first transmission shaft (1) is used to connect the actuator (01) and the second transmission shaft (2) is used to connect the radiator valve (02); A torsional energy storage part which is sleeved on the second transmission shaft (2) and is used to drive the second transmission shaft (2) to rotate when releasing the torque so as to open the radiator valve (02); a temperature sensing actuator arranged adjacent to the first transmission shaft (1); when the temperature of the engine is higher than a preset heat dissipation temperature, the temperature sensing actuator drives the first transmission shaft (1) to move until it is separated from the second transmission shaft (2) to release the torque of the torsional energy storage unit; The torsional energy storage part comprises a coil spring (3) and a coil spring fixing shaft (4) arranged parallel to one side of the second transmission shaft (2); wherein one end of the coil spring (3) located on the inner ring is fixedly connected to the second transmission shaft (2), and the other end of the coil spring (3) located on the outer ring has a curling edge (31) for being sleeved on the coil spring fixing shaft (4); The coil spring fixing shaft (4) is fixedly connected to the first transmission shaft (1); The temperature sensing actuator comprises a temperature sensing element and an actuator connected to the temperature sensing element and used to push the first transmission shaft (1) to move toward an end away from the second transmission shaft (2) when the temperature sensing element detects that the temperature of the engine is higher than a preset heat dissipation temperature; and also comprises a compression spring (5) arranged between the first transmission shaft (1) and the actuator (01); The temperature sensing element is specifically a temperature sensing wax bag (6); a wax bag is provided on one side of the first transmission shaft (1), and the temperature sensing wax bag (6) is filled in the cavity of the wax bag; the actuator is specifically a push rod (7) arranged parallel to the first transmission shaft (1); the first end of the push rod (7) is fixed in a groove in the middle of the temperature sensing wax bag (6), and the second end is against the first transmission shaft (1).

2. The thermostat error prevention device according to claim 1, characterized in that: It also comprises a shaft top plate (8) which is sleeved on the first transmission shaft (1) and is used for the second end of the push rod (7) to abut against.

3. A thermostat, comprising an actuator (01) and a radiator valve (02), characterized in that: It also includes the thermostat error prevention device as described in claim 1 or 2.

4. An engine system, characterized in that: Comprising the thermostat as claimed in claim 3.

5. The engine system according to claim 4, characterized in that: It also includes an indication unit connected to the thermostat and used to issue an early warning prompt when the actuator (01) fails to work normally.

6. The engine system according to claim 5, characterized in that: The indicating unit is specifically a display screen for displaying thermostat failure.

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