Low-accelerator starting safeguard system and skid-steer loader
By designing a low throttle start guarantee system, including the throttle control mechanism and engine start circuit, the problem of skid steering loader operators forgetting to reset the throttle operating handle caused the engine to start at high speed, achieving low idle start and extended service life of the engine.
Patent Information
- Application Number
- CN202420562279.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-21
- Publication Date
- 2025-03-11
- Estimated Expiration
- 2034-03-21
AI Technical Summary
After the skid steering loader is used, the operator often forgets to reset the throttle operating handle, which causes the engine to start directly at a high speed when the next start, which can easily cause engine damage.
Design a low throttle start assurance system, including a throttle control mechanism and engine start circuit. The throttle control mechanism is driven by the rotary installation and installation throttle operation handle and the throttle pulling wire of the engine. The linkage structure simultaneously drives the accelerator pedal. The switching element is closed at the initial position of the throttle operation handle to avoid non-low idle start.
Make sure that the engine can only start when the throttle operating handle is in the initial position, avoid the engine's large throttle start and extend the engine's service life.
Smart Images
Figure CN222595010U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of engineering machinery, and in particular relates to a low-throttle starting guarantee system and a skid-steer loader. Background Art
[0002] The skid steer loader is a multifunctional small-sized working machine, which is powered by a diesel engine. In order to protect the engine, the engine throttle is preferably kept at the low throttle position of the lowest idle speed when the skid steer loader is started. Some existing skid steer loaders use a throttle pedal and a throttle operating handle to jointly control the throttle, and the throttle cable is pulled by the throttle pedal and the throttle operating handle respectively, so that the engine throttle size matches the current working condition.
[0003] The investigation found that after using the above-mentioned skid-steer loader, the operator often forgets to reset the throttle operating handle, resulting in the engine starting directly at a high speed the next time. If the engine speed is too high when starting and the initial lubrication of the engine is poor, it is easy to cause friction between moving parts and cause engine damage. Therefore, it is necessary to design a low-throttle starting guarantee system based on the skid-steer loader. Utility Model Content
[0004] In view of the above defects or shortcomings, the utility model provides a low throttle starting guarantee system and a skid steer loader, aiming to solve the technical problem that the existing skid steer loader often starts the engine directly without resetting the throttle.
[0005] To achieve the above-mentioned purpose, the utility model provides a low-throttle starting guarantee system, which includes a throttle control mechanism and an engine starting circuit. The throttle control mechanism includes a throttle operating handle that is rotatably mounted, and the throttle operating handle is connected to the throttle cable of the engine through transmission. The engine starting circuit includes a power supply module, an engine starting module, a key switch module and a switch element that constitute a series circuit. The switch element is used to close when the throttle operating handle is in the initial position, and to disconnect when the throttle operating handle pulls the throttle cable.
[0006] In an embodiment of the utility model, the throttle control mechanism also includes a throttle pedal arranged to rotate in the same direction as the throttle operating handle, and a linkage structure is provided between the throttle operating handle and the throttle pedal. The linkage structure is used to synchronously drive the throttle pedal to rotate downward when the throttle operating handle is pushed forward, and to disengage the linkage with the throttle operating handle when the throttle pedal rotates downward alone. When the operating handle is pushed forward or the throttle pedal rotates downward, the throttle cable will be pulled to increase the throttle of the engine.
[0007] In an embodiment of the utility model, the linkage structure is a transmission lever extending from the accelerator pedal and to the front side of the accelerator operating handle. The transmission lever is fixed to the accelerator pedal, and one end of the throttle cable is fixedly connected to the transmission lever.
[0008] In an embodiment of the utility model, the throttle control mechanism further includes a reset elastic member, and the reset elastic member is used to push the accelerator pedal to lift and reset it.
[0009] In an embodiment of the utility model, the throttle control mechanism further includes a handle locking member, which is used to overcome the thrust transmitted by the reset elastic member to the throttle operating handle after the transmission lever contacts the throttle operating handle.
[0010] In an embodiment of the utility model, the throttle control mechanism also includes a mounting seat, a rotating mounting shaft is provided on the mounting seat, a limit baffle is provided on the rotating mounting shaft, the throttle operating handle is rotatably mounted on the rotating mounting shaft and is located between the limit baffle and the mounting seat, and the handle locking member is a disc spring, which is arranged between the limit baffle and the throttle operating handle or between the mounting seat and the throttle operating handle.
[0011] In an embodiment of the utility model, the rotatable installation shaft is a bolt and one end of the rotatable installation shaft away from the mounting seat is a nut end of the bolt, and the accelerator pedal is rotatably installed between the limit stopper and the nut end through a bushing.
[0012] In an embodiment of the present utility model, the transmission lever may also be arranged in linkage with the accelerator pedal.
[0013] In the embodiment of the present invention, the switch element is one of a touch switch, a travel switch and a proximity switch.
[0014] To achieve the above object, the utility model further provides a skid steer loader, wherein the skid steer loader comprises the low throttle starting guarantee system described above.
[0015] Through the above technical solution, the low throttle start guarantee system provided by the embodiment of the utility model has the following beneficial effects:
[0016] When the throttle operating handle is in the initial position, the throttle corresponds to the low idle position. At this time, the switch element is in a closed state. In this case, if the key switch is turned to the start position, the entire engine starting circuit will form a path, so that the engine starting module is powered and the engine is started at low idle. When the throttle operating handle is in other positions, the switch element will be in a disconnected state. In this case, even if the key switch is turned to the start position, the power supply module cannot supply power to the engine starting module, thereby preventing the engine from starting under non-low idle conditions. In summary, the low throttle starting guarantee system in the utility model can ensure that the engine can only be started when the throttle operating handle is in the initial position by linking the switch element in the engine starting circuit with the position of the throttle operating handle, thereby avoiding the situation where the engine is started with a large throttle and ensuring the service life of the engine.
[0017] Other features and advantages of the present invention will be described in detail in the subsequent specific implementation section. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] The accompanying drawings are used to provide an understanding of the present invention and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the present invention, but do not constitute a limitation to the present invention. In the accompanying drawings:
[0019] Figure 1 is a schematic diagram of a throttle control mechanism according to an embodiment of the present utility model from a first viewing angle;
[0020] Figure 2 is a schematic diagram of a throttle control mechanism according to a second viewing angle in an embodiment of the utility model;
[0021] Figure 3 According to the embodiment of the utility model Figure 2 Sectional view of AA in the middle;
[0022] Figure 4 It is a connection diagram of an engine starting circuit according to an embodiment of the utility model.
[0023] Description of Reference Numerals
[0024] 1 Throttle control mechanism 11 Throttle operating handle
[0025] 12 Accelerator pedal 13 Transmission lever
[0026] 14 Mounting seat 141 Positioning lever
[0027] 15 Rotating mounting shaft 16 Limit stopper
[0028] 17 Handle locking part 171 Disc spring
[0029] 18 Nut end 19 Bushing
[0030] 21 Power supply module 22 Engine start module
[0031] 23 Key switch module 24 Switch element
[0032] 3 Throttle cable DETAILED DESCRIPTION
[0033] The specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.
[0034] The low throttle starting guarantee system of the present utility model is described below with reference to the accompanying drawings.
[0035] The utility model provides a low throttle starting guarantee system, such as Figure 1 , Figure 2 and Figure 4 As shown, the low throttle start protection system includes:
[0036] The throttle control mechanism 1 comprises a throttle operating handle 11 which is rotatably mounted and the throttle operating handle 11 is transmission-connected to the throttle cable 3 of the engine; and
[0037] The engine starting circuit includes a power supply module 21, an engine starting module 22, a key switch module 23 and a switch element 24 forming a series circuit. The switch element 24 is used to close when the throttle operating handle 11 is in the initial position, and to open when the throttle operating handle 11 pulls the throttle cable 3.
[0038] When the throttle operating handle 11 is in the initial position, the throttle corresponds to the low idle position. At this time, the switch element 24 is in a closed state. In this case, if the key switch is turned to the start position, the controller will control the relay switch to close, and the entire engine start circuit will form a path, so that the engine start module 22 is powered and the engine is started at a low idle speed. When the throttle operating handle 11 is in other positions, the switch element 24 will be in a disconnected state. In this case, even if the key switch is turned to the start position, the power supply module 21 cannot supply power to the engine start module 22, thereby avoiding the engine from starting under non-low idle conditions. In summary, the low throttle start guarantee system in the utility model can ensure that the engine can only be started when the throttle operating handle 11 is in the initial position by linking the switch element 24 in the engine start circuit with the position of the throttle operating handle 11, thereby avoiding the situation where the engine starts with a large throttle and ensuring the service life of the engine.
[0039] like Figure 1 and Figure 2As shown, in an embodiment of the utility model, the throttle control mechanism 1 also includes a throttle pedal 12 that is arranged to rotate in the same direction as the throttle operating handle 11, and a linkage structure is provided between the throttle operating handle 11 and the throttle pedal 12, and the linkage structure is used to synchronously drive the throttle pedal 12 to rotate downward when the throttle operating handle 11 is pushed forward, and is used to disengage the linkage with the throttle operating handle 11 when the throttle pedal 12 rotates downward alone, wherein, when the operating handle is pushed forward, or when the throttle pedal 12 rotates downward, the throttle cable 3 will be pulled to increase the throttle of the engine. In the field of vehicles, the operation logic corresponding to pushing the throttle operating handle 11 forward and stepping on the throttle pedal 12 is to increase the throttle. When the engine is started, if the engine needs to work constantly with a larger throttle, it is only necessary to push the throttle operating handle 11 forward, at which time the throttle cable 3 will move forward, and the throttle of the engine will increase. By fixing the throttle operating handle 11 in this position, the throttle can be maintained in this state. The purpose of setting the linkage structure is to ensure that the corresponding relationship between the stroke of the throttle pedal 12 and the size of the throttle is unique.
[0040] In an embodiment of the utility model, the linkage structure can also be disengaged from the throttle operating handle 11 when the accelerator pedal 12 is depressed alone, thereby meeting the working condition when the engine operates at a constant throttle and occasionally or for a short time needs to increase the throttle.
[0041] like Figure 1 and Figure 2 As shown, in an embodiment of the utility model, the linkage structure can be a transmission lever 13 extending from the accelerator pedal 12 and extending to the front side of the accelerator operating handle 11. The transmission lever 13 is fixed to the accelerator pedal 12, and one end of the throttle cable 3 is fixedly connected to the transmission lever 13. Specifically, the transmission lever 13 can be integrally formed with the accelerator pedal 12, or it can be connected and fixed to the accelerator pedal 12 by means of fixed connectors or welding. Of course, the transmission lever 13 can also be linked or transmitted with the accelerator pedal 12. The throttle cable 3 can be hinged on the transmission lever 13, and of course it can also be directly hinged on the accelerator pedal 12. The throttle operating handle 11 is connected to the throttle cable 3 through the transmission lever 13. When the throttle operating handle 11 is pushed forward, the front end of the throttle operating handle 11 will push the transmission lever 13, thereby pushing the throttle pedal 12 to rotate synchronously. When the accelerator pedal 12 is pressed alone, the transmission lever 13 will be disengaged from the throttle operating handle 11. At this time, the increase or decrease of the throttle is only controlled by the accelerator pedal 12.
[0042] In an embodiment of the utility model, the linkage structure can also be a ratchet structure, and the gear teeth of the ratchet structure are set on the accelerator pedal 12, and the pawl is set on the throttle operating handle 11. Through the cooperation of the gear teeth and the pawl, the above-mentioned effect can also be achieved.
[0043] In an embodiment of the utility model, the linkage structure can also be a coupling structure with a clutch function. When the throttle operating handle 11 rotates, the coupling structure is connected to drive the throttle pedal 12 to rotate together, and when the throttle pedal 12 is pressed alone, the coupling structure is disconnected.
[0044] In the embodiment of the utility model, the throttle control mechanism 1 further includes a reset elastic member, which is used to push the throttle pedal 12 to lift and reset. The reset elastic member can be a reset spring, a torsion spring, etc. When the engine is working at a constant throttle, after the throttle pedal 12 is stepped on, the throttle is further increased, and after the throttle pedal 12 is released, the throttle pedal 12 is reset to the transmission lever 13 and the throttle operating handle 11 under the action of the reset elastic member, and the throttle cable 3 will be reset under the action of the return spring, and the throttle of the engine will be restored to the previous constant throttle size.
[0045] It should be noted that a return spring is generally provided at the position of the engine throttle, and the return spring can pull the throttle cable 3 to reset.
[0046] like Figure 1 and Figure 3 As shown, in an embodiment of the utility model, the throttle control mechanism 1 also includes a handle locking member 17, and the handle locking member 17 is used to lock and fix the throttle operating handle 11 when the throttle operating handle 11 is pushed forward, so as to prevent the throttle operating handle 11 from moving randomly and affecting the constant output function of the throttle. At the same time, the handle locking member 17 can also overcome the thrust transmitted to the throttle operating handle 11 by the reset elastic member after the transmission gear lever 13 contacts the throttle operating handle 11.
[0047] like Figure 1 and Figure 3 As shown, there are many arrangements of the handle locking member 17. For example, in an embodiment of the present utility model, the throttle control mechanism 1 may include a mounting seat 14, a rotating mounting shaft 15 is provided on the mounting seat 14, a limit stopper 16 is provided on the rotating mounting shaft 15, a throttle operating handle 11 is rotatably mounted on the rotating mounting shaft 15 and is located between the limit stopper 16 and the mounting seat 14, and the handle locking member 17 may be a disc spring 171, which is arranged between the limit stopper 16 and the throttle operating handle 11 or between the mounting seat 14 and the throttle operating handle 11. The disc spring 171 can maintain the pressure between the shaft sleeve portion of the throttle operating handle 11 and the mounting seat 14 or the limit stopper 16, so that the friction force on the throttle operating handle 11 can overcome the thrust of the reset elastic member.
[0048] In the embodiment of the utility model, the handle locking member 17 can also be a limiting step, a stopping rod, etc., which is arranged on the mounting seat 14 and is used to stop the shaft portion of the throttle operating handle 11 .
[0049] like Figure 1 and Figure 3 As shown, in the embodiment of the utility model, the rotating mounting shaft 15 is a bolt and the end of the rotating mounting shaft 15 away from the mounting seat 14 is the nut end 18 of the bolt, and the accelerator pedal 12 is rotatably mounted between the limit baffle 16 and the nut end 18 through the bushing 19. The limit baffle is movably sleeved on the bolt, and the limit baffle can be pressed toward the mounting seat 14 by tightening the nut end of the bolt, thereby adjusting the compression tension of the disc spring 171, and by providing the bushing 19, the influence of the tightening of the bolt on the rotation of the accelerator pedal 12 can be avoided.
[0050] like Figure 1 As shown, in an embodiment of the utility model, a positioning lever 141 for positioning the initial position may be provided on the mounting seat 14. When the throttle operating handle 11 is pushed backward to abut against the positioning lever 141, it indicates that the throttle operating handle 11 is in the initial position.
[0051] like Figure 1 As shown, in the embodiment of the utility model, the switch element 24 can be a touch switch, a travel switch, a proximity switch, etc. Taking the touch switch as an example, the touch switch can be set near the positioning lever 141. When the throttle operating handle 11 is in the initial position and abuts against the positioning lever 141, the throttle operating handle 11 will compress the contact of the touch switch to turn on the touch switch, and when the throttle operating handle 11 is in other positions, the contact of the touch switch is reset and the touch switch is switched to the disconnected state. Or taking the proximity switch as an example, when the throttle operating handle 11 is in the initial position, the proximity switch senses the throttle operating handle 11 and turns on, and when the throttle operating handle 11 is in other positions, the proximity switch senses the throttle operating handle 11 away and turns off.
[0052] To achieve the above object, the utility model further provides a skid steer loader, wherein the skid steer loader includes the low throttle start-up guarantee system described above. Since the skid steer loader adopts all the technical solutions of the above embodiments, it has at least the beneficial effects brought by the above embodiments, which will not be repeated here.
[0053] In summary, the low throttle starting guarantee system in the present invention not only provides a throttle control mechanism 1 with a hand throttle and a foot throttle and a simple structure, but also ensures that the engine is always started at a low throttle, thereby reducing the failure rate of the engine and increasing the service life of the entire vehicle.
[0054] In the description of the present invention, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise clearly and specifically defined.
[0055] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0056] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.
[0057] Although the embodiments of the present invention have been described above, it is understandable that the above embodiments are exemplary and cannot be construed as limitations on the present invention. A person skilled in the art may change, modify, replace and modify the above embodiments within the scope of the present invention.
Claims
1. A low throttle starting guarantee system, characterized in that: The low throttle start guarantee system comprises: A throttle control mechanism (1) comprises a throttle operating handle (11) which is rotatably mounted, wherein the throttle operating handle (11) is transmission-connected to a throttle cable (3) of an engine; and An engine starting circuit comprises a power supply module (21) forming a series circuit, an engine starting module (22), a key switch module (23) and a switch element (24), wherein the switch element (24) is used to close when the throttle operating handle (11) is in an initial position, and to open when the throttle operating handle (11) pulls the throttle cable (3) to operate.
2. The low throttle start guarantee system according to claim 1, characterized in that: The throttle control mechanism (1) further comprises a throttle pedal (12) arranged to rotate in the same direction as the throttle operating handle (11), and a linkage structure is provided between the throttle operating handle (11) and the throttle pedal (12), the linkage structure being used to synchronously drive the throttle pedal (12) to rotate downward when the throttle operating handle (11) is pushed forward, and being used to disconnect the linkage with the throttle operating handle (11) when the throttle pedal (12) rotates downward alone; When the operating handle is pushed forward, or the accelerator pedal (12) is rotated downward, the accelerator cable (3) will be pulled to increase the throttle of the engine.
3. The low throttle start guarantee system according to claim 2, characterized in that: The linkage structure is a transmission lever (13) extending from the accelerator pedal (12) to the front side of the accelerator operating handle (11); the transmission lever (13) is fixedly arranged with the accelerator pedal (12); and one end of the accelerator cable (3) is fixedly connected to the transmission lever (13).
4. The low throttle start guarantee system according to claim 3, characterized in that: The throttle control mechanism (1) also includes a resetting elastic member, and the resetting elastic member is used to push the throttle pedal (12) to lift and reset.
5. The low throttle start guarantee system according to claim 4, characterized in that: The throttle control mechanism (1) further comprises a handle locking member (17), wherein the handle locking member (17) is used to overcome the thrust transmitted by the return elastic member to the throttle operating handle (11) after the transmission lever (13) contacts the throttle operating handle (11).
6. The low throttle start guarantee system according to claim 5, characterized in that: The throttle control mechanism (1) also includes a mounting seat (14), a rotatable mounting shaft (15) is provided on the mounting seat (14), a limit baffle (16) is provided on the rotatable mounting shaft (15), the throttle operating handle (11) is rotatably mounted on the rotatable mounting shaft (15) and is located between the limit baffle (16) and the mounting seat (14), and the handle locking member (17) is a disc spring (171), and the disc spring (171) is arranged between the limit baffle (16) and the throttle operating handle (11) or between the mounting seat (14) and the throttle operating handle (11).
7. The low throttle start guarantee system according to claim 6, characterized in that: The rotatable mounting shaft (15) is a bolt, and one end of the rotatable mounting shaft (15) away from the mounting seat (14) is a nut end (18) of the bolt. The accelerator pedal (12) is rotatably mounted between the limit stopper (16) and the nut end (18) via a bushing (19).
8. The low throttle start guarantee system according to claim 2, characterized in that: The linkage structure is a transmission lever (13) extending to the front side of the throttle operating handle (11), and the transmission lever (13) is arranged in linkage with the throttle pedal (12).
9. The low throttle start guarantee system according to any one of claims 1 to 8, characterized in that: The switch element (24) is one of a touch switch, a travel switch and a proximity switch.
10. A skid steer loader, characterized in that: It comprises a low throttle start guarantee system according to any one of claims 1 to 9.