Double-linkage door lock, hood and engineering machinery

Abstract

The utility model provides a double-linkage door lock, a hood and engineering machinery, and belongs to the technical field of engineering machinery, the double-linkage door lock comprises a driving lock, a driven lock and a transmission rod, the driving lock is mounted on one side of a hood door plate; the driven lock is mounted on one side, opposite to the driving lock, of the hood door plate; the transmission rod is connected between the driving lock and the driven lock; and when the driving lock is unlocked or locked, the driven lock is driven by the transmission rod to be linked and synchronously unlocked or locked. The double-lock structure with the driving lock and the driven lock linked is adopted, the two opposite sides of the hood door plate are synchronously locked with the hood frame through the driving lock and the driven lock respectively, the locking firmness of the hood door plate is greatly improved, and therefore the problem that the hood door plate deforms along with bumping and vibration of a whole vehicle, and consequently the door lock loses efficacy can be solved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to engineering machinery technical field, concretely relates to a kind of double linkage door lock, machine cover and engineering machinery. BACKGROUND

[0002] The machine cover of excavator, loader and other engineering machinery can protect engine and other key components from damage by external environment, thereby protecting the normal operation of engine. In addition, the machine cover can also prevent the water tank from being collided or scratched to a certain extent, protecting the safety of the water tank. The machine cover includes a machine cover frame, a door panel, a door lock and other components. The machine cover frame is connected with the machine cover door panel through the door lock, that is, the machine cover door panel is locked on the machine cover frame through the door lock, thereby forming a closed machine cover.

[0003] Engineering machinery has large load and power. The machine cover door panel has large weight and size. Moreover, the working conditions are poor, and the jolt and vibration make it difficult for a door lock to lock the machine cover door panel firmly, thereby causing the machine cover door panel to shake with the machine cover frame, generating large noise. Over time, this can cause the machine cover door panel to deform or the door lock to fail. SUMMARY

[0004] The utility model embodiment provides a kind of double linkage door lock, machine cover and engineering machinery, to solve the problem that current door lock is difficult to lock door panel firmly.

[0005] To achieve the above object, the utility model adopts the technical scheme of providing a kind of double linkage door lock, comprising: driving lock, driven lock and transmission rod, driving lock is installed in one side of machine cover door panel;Driven lock is installed on the side of machine cover door panel opposite to the driving lock;Transmission rod is connected between the driving lock and the driven lock;When the driving lock is unlocked or locked, the driven lock is driven by the transmission rod to be unlocked or locked synchronously.

[0006] In a realizable manner, the driving lock comprises a main lock shell, a main lock pressing plate, a handle and a main lock spring. The main lock shell is installed on the machine cover door panel. The main lock pressing plate and the handle are connected to the main lock shell through a first shaft. The main lock spring is connected between the first shaft and the main lock pressing plate.

[0007] The driven lock comprises a driven lock shell, a driven lock pressing plate and a driven lock spring. The driven lock shell is installed on the machine cover door panel. The driven lock pressing plate is connected to the driven lock shell through a second shaft. The driven lock spring is connected between the driven lock shell and the driven lock pressing plate.

[0008] One end of the transmission rod is connected to the main lock pressing plate through a third shaft, and the other end is connected to the driven lock pressing plate through a fourth shaft. The main lock pressing plate, the transmission rod, the driven lock pressing plate and the machine cover door panel jointly constitute a four-bar linkage mechanism.

[0009] The handle drives the main lock pressing plate to rotate through the first shaft, drives the slave lock pressing plate to link through the transmission rod, so that the slave lock pressing plate and the main lock pressing plate are simultaneously pressed or away from the hood frame, and the unlocking or locking of the hood door plate is realized; the main lock spring and the slave lock spring are stretched when unlocking and are elastically reset when locking.

[0010] The handle is pulled by hand, power is transmitted to the main lock pressing plate through the first shaft, the main lock pressing plate rotates away from the hood frame against the elastic force of the main lock spring; at the same time, power is transmitted to the transmission rod through the third shaft on the main lock pressing plate, and is transmitted to the fourth shaft through the transmission rod, drives the slave lock pressing plate connected with the fourth shaft to rotate around the second shaft against the elastic force of the slave lock spring, so that the slave lock pressing plate rotates away from the hood frame, at this time, the main lock pressing plate and the slave lock pressing plate are simultaneously opened, that is, the double interlocking lock is opened, and then the hood door plate can be opened. When the handle is released, the external force applied to the handle disappears, then the main lock pressing plate and the slave lock pressing plate reversely rotate towards the hood frame under the reset elastic force of the respective springs, are simultaneously pressed on the hood frame, and locking is realized at the same time, so that the hood door plate is locked on the hood frame.

[0011] In combination with the first aspect, in an implementable manner, a fourth trajectory hole limiting the movement trajectory of the fourth shaft is arranged on the slave lock shell, and the fourth shaft limits the reciprocating swing amplitude of the slave lock pressing plate through the fourth trajectory hole. The fourth shaft matched with the fourth trajectory hole plays a role in guiding the rotation of the slave lock pressing plate, prevents jamming during rotation, and makes the movement of the entire mechanism more smooth and reliable.

[0012] In combination with the first aspect, in an implementable manner, a fifth shaft is further arranged on the slave lock pressing plate and the slave lock shell, and a fifth trajectory hole limiting the fifth shaft is further arranged on the slave lock shell; wherein the fifth shaft and the fourth shaft are respectively located above and below the second shaft to limit the reciprocating swing amplitude of the slave lock pressing plate. The fifth shaft matched with the fifth trajectory hole further plays a role in guiding the rotation of the slave lock pressing plate, prevents jamming during rotation, and makes the movement of the entire mechanism more smooth and reliable.

[0013] In combination with the first aspect, in an implementable manner, a sixth shaft is further arranged on the slave lock shell, and the slave lock spring is connected between the sixth shaft and the fifth shaft. The sixth shaft provides support for the installation of the slave lock spring, the sixth shaft is located above the fifth shaft, and the fourth shaft is located below the second shaft, so that the slave lock spring is stretched to store energy when the slave lock pressing plate is rotated to open, and the slave lock spring is elastically reset when the slave lock pressing plate is locked, so that the slave lock pressing plate can press the hood frame and realize the locking of the hood door plate and the hood frame.

[0014] In combination with the first aspect, in an implementable manner, the handle is provided with a limiting plate, the limiting plate is provided with a track groove, and the main lock pressing plate is provided with a seventh shaft limited in the track groove. The seventh shaft matched with the track groove can guide the rotation of the main lock pressing plate, prevent the main lock pressing plate from being stuck during rotation, and make the movement of the whole mechanism more smooth and reliable.

[0015] In combination with the first aspect, in an implementable manner, the handle and the first shaft are provided with a reset spring, and the handle is buckled on the main lock shell under the elastic force of the reset spring after being released. The reset spring is installed between the first shaft and the handle body, stretched when the movable lock plate is opened, and drives the handle body to be buckled on the main lock shell when the handle is released.

[0016] In combination with the first aspect, in an implementable manner, the main lock shell is provided with a guide block, and the guide block is provided with a guide hole for the transmission rod to pass through. The guide block guides the transmission of the transmission rod and prevents the transmission rod from being deflected.

[0017] Compared with the prior art, the double linkage door lock has the beneficial effects that: the double lock structure of the active lock and the driven lock linkage is adopted, the opposite sides of the hood door plate are locked by the active lock and the driven lock and the hood frame, which is equivalent to adding a door lock to the hood door plate, and the door lock is arranged on the opposite sides of the hood door plate, the double lock structure greatly improves the firmness of the hood door plate locking, thereby avoiding the problem of door lock failure caused by the deformation of the hood door plate due to the vibration of the whole vehicle; the active lock and the driven lock are connected through the transmission rod, the linkage design of the active lock and the driven lock is realized, the active lock and the driven lock can synchronously act when the hood door plate is unlocked or locked, linkage unlocking and locking are realized, the locking force of the door lock is greatly increased, the problem that the door plate is difficult to be locked firmly by the current door lock is effectively solved, the shaking and noise between the hood door plate and the hood frame are avoided, the service life of the hood door plate and the reliability of the door lock are prolonged, the operation is more convenient, the structure is compact, and the stability is high.

[0018] In the second aspect, the utility model embodiment further provides a hood which is provided with the double linkage door lock.

[0019] The hood provided by the utility model embodiment has the double linkage door lock with the active lock and the driven lock capable of being synchronously unlocked or locked, the locking force of the door lock is greatly increased, the problem that the door plate is difficult to be locked firmly by the current door lock is effectively solved, the shaking and noise between the hood door plate and the hood frame are avoided, the service life of the hood door plate and the reliability of the door lock are prolonged, the operation is more convenient, the structure is compact, and the stability is high.

[0020] In a third aspect, the utility model embodiment further provides an engineering machinery, including the bonnet.

[0021] The utility model embodiment provides engineering machinery, because adopted this bonnet with double linkage door lock, avoided the sway and noise between bonnet door board and bonnet frame, prolonged the service life of bonnet door board and the reliability of door lock, improved the brand value of whole car. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 The utility model provides the structure schematic diagram of double linkage door lock unlocking state for utility model embodiment;

[0023] Figure 2 The utility model provides the structure schematic diagram of double linkage door lock locking state for utility model embodiment;

[0024] Figure 3 The utility model provides the explosion structure schematic diagram of double linkage door lock for utility model embodiment;

[0025] Figure 4 The utility model provides the force transmission structure schematic diagram (unlocking state) of double linkage door lock for utility model embodiment;

[0026] Figure 5 The utility model provides the three -dimensional structure schematic of initiative lock for utility model embodiment Figure 1 ;

[0027] Figure 6 The utility model provides the three -dimensional structure schematic of initiative lock for utility model embodiment Figure 2 ;

[0028] Figure 7 The utility model provides the three -dimensional structure schematic of initiative lock for utility model embodiment Figure 3 ;

[0029] Figure 8 The utility model provides the overhead structure schematic of initiative lock for utility model embodiment;

[0030] Figure 9 It is the sectional view structure diagram along Figure 8 A-A line in middle;

[0031] Figure 10 The utility model provides the explosion structure schematic diagram of initiative lock for utility model embodiment;

[0032] Figure 11 The utility model provides the three -dimensional structure schematic of bonnet door board unlocking state for utility model embodiment;

[0033] Figure 12 It is the local enlarged view of B in middle; Figure 11 ​

[0034] Figure 13 A three-dimensional structure schematic diagram of the hood door plate locking state provided by the embodiment of the utility model;

[0035] Figure 14 To Figure 13 The local enlarged view at C;

[0036] Reference signs:

[0037] 1, transmission rod; 2, guide block; 3, driving lock; 31, main lock pressing plate; 32, third shaft; 33, first shaft; 34, main lock shell; 341, locking hole; 35, handle; 351, lock core; 3511, eccentric lever; 3512, rotating core; 3513, fixed lock sleeve; 352, handle body; 353, movable lock plate; 354, guide plate; 36, main lock spring; 37, seventh shaft; 38, limiting plate; 381, track groove; 39, return spring; 4, driven lock; 41, driven lock shell; 42, driven lock pressing plate; 43, second shaft; 44, fourth shaft; 45, fourth track hole; 46, fifth shaft; 47, fifth track hole; 48, sixth shaft; 49, driven lock spring; 5, hood frame; 6, hood door plate. DETAILED DESCRIPTION

[0038] In order to make the technical problems, technical solutions and beneficial effects of the utility model to be solved clearer and more apparent, the utility model will be further described in detail below in combination with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the utility model and do not limit the utility model.

[0039] In the present application, terms such as "first", "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual quantity, primary or secondary or order relationship between the entities or operations.

[0040] Please refer to Figures 1 to 14 , the double linkage door lock provided by the utility model will be described. The double linkage door lock comprises a driving lock 3, a driven lock 4 and a transmission rod 1, the driving lock 3 is installed on one side of a hood door plate 6; the driven lock 4 is installed on the side of the hood door plate 6 opposite to the driving lock 3; the transmission rod 1 is connected between the driving lock 3 and the driven lock 4; when the driving lock 3 is unlocked or locked, the driven lock 4 is driven by the transmission rod 1 to be unlocked or locked synchronously.

[0041] The double linkage door lock has the advantages that: the double lock structure of the active lock 3 and the driven lock 4 is adopted, the opposite sides of the hood door plate 6 are locked by the active lock 3 and the driven lock 4 and the hood frame 5, one door lock is added to the hood door plate 6, the door locks are arranged on the opposite sides of the hood door plate 6, the double lock structure greatly improves the firmness of the hood door plate 6, and the problem that the hood door plate 6 is deformed due to vibration of the whole vehicle and causes the door lock to fail is avoided; the active lock 3 and the driven lock 4 are connected through the transmission rod 1, linkage design of the active lock 3 and the driven lock 4 is realized, the active lock 3 and the driven lock 4 can synchronously act when the hood door plate 6 is unlocked or locked, linkage unlocking and locking are realized, the locking force of the door lock is greatly increased, the problem that the door lock is difficult to lock the door plate is effectively solved, the shaking and noise between the hood door plate 6 and the hood frame 5 are avoided, the service life of the hood door plate 6 and the reliability of the door lock are prolonged, the operation is more convenient, the structure is compact, and the stability is high.

[0042] In application, the double linkage door lock can be applied to engineering machinery such as loaders and excavators in harsh working conditions, and the firmness and reliability of the hood door plate 6 and the hood frame 5 are ensured.

[0043] In actual application, the double linkage door lock has excellent performance. For example, when the vehicle runs on a rugged road, the vibration of the whole vehicle is extremely strong, but due to the firmness of the double lock structure, the hood door plate 6 can always remain stable, and the door lock does not fail at all. When the operator needs to open or close the hood door plate 6, the active lock 3 only needs to be operated, and the driven lock 4 can quickly and synchronously act through the transmission of the transmission rod 1, linkage unlocking or locking is realized, the whole process is extremely smooth, and no additional complex operation is needed. Moreover, the double linkage door lock has a compact structure and is installed close to the hood door plate 6, without occupying too much space. At the same time, the stability is high, and after a long time of use and test in various harsh environments, the double linkage door lock can still maintain a good working state, effectively avoiding the adverse effects caused by the shaking and noise of the hood door plate 6, and providing reliable protection for the safe operation of the vehicle and the user experience.

[0044] In some embodiments, referring to Figures 1 to 10 , the active lock 3 comprises a main lock shell 34, a main lock pressing plate 31, a handle 35 and a main lock spring 36, the main lock shell 34 is installed on the hood door plate 6, the main lock pressing plate 31 and the handle 35 are connected to the main lock shell 34 through a first shaft 33, and the main lock spring 36 is connected between the first shaft 33 and the main lock pressing plate 31;

[0045] The driven lock 4 comprises a driven lock housing 41, a driven lock pressing plate 42 and a driven lock spring 49, the driven lock housing 41 is mounted on the hood door plate 6, the driven lock pressing plate 42 is connected to the driven lock housing 41 through a second shaft 43, and the driven lock spring 49 is connected between the driven lock housing 41 and the driven lock pressing plate 42;

[0046] One end of the transmission rod 1 is connected to the main lock pressing plate 31 through a third shaft 32, and the other end is connected to the driven lock pressing plate 42 through a fourth shaft 44; the main lock pressing plate 31, the transmission rod 1, the driven lock pressing plate 42 and the hood door plate 6 jointly constitute a four-bar linkage mechanism. The four-bar linkage mechanism realizes the linkage of the main lock pressing plate 31 and the driven lock pressing plate 42, the hood door plate 6 is equivalent to the frame of the four-bar linkage mechanism, the main lock pressing plate 31 and the driven lock pressing plate 42 are equivalent to the swing arms of the four-bar linkage mechanism due to the swinging around the first shaft 33 and the second shaft 43 respectively, and the transmission rod 1 is a component for transmitting power between the two swing arms.

[0047] In combination with Figure 4 The working principle of the double linkage door lock provided by the application is understood as follows according to the force transmission schematic diagram: the handle 35 is pulled by hand, power is transmitted to the main lock pressing plate 31 through the first shaft 33, the main lock pressing plate 31 rotates in the direction away from the hood frame 5 to be opened against the elastic force of the main lock spring 36; at the same time, power is transmitted to the transmission rod 1 through the third shaft 32 on the main lock pressing plate 31, and is transmitted to the fourth shaft 44 through the transmission rod 1, so as to drive the driven lock pressing plate 42 connected to the fourth shaft 44 to rotate around the second shaft 43 against the elastic force of the driven lock spring 49, so that the driven lock pressing plate 42 rotates in the direction away from the hood frame 5 to be opened, at this time, the main lock pressing plate 31 and the driven lock pressing plate 42 are opened at the same time, that is, the double linkage lock is opened, and then the hood door plate 6 can be opened. When the handle 35 is released, the external force applied to the handle 35 disappears, and then the main lock pressing plate 31 and the driven lock pressing plate 42 reversely rotate in the direction close to the hood frame 5 under the resetting elastic force of the respective springs, and are simultaneously pressed on the hood frame 5, so as to realize locking, thereby driving the hood door plate 6 to be locked on the hood frame 5.

[0048] Figure 4 In the figure, the arrow on the transmission rod 1 is the force transmission direction, the main lock pressing plate 31 rotates clockwise, the driven lock pressing plate 42 rotates counterclockwise, and the arrow at the handle 35 is the pulling force direction.

[0049] Since the main lock spring 36 and the driven lock spring 49 are in the elastic resetting state when the main driven lock 3 and the driven lock 4 are in the locking state, the hood door plate 6 can be firmly locked on the hood frame 5; the main lock spring 36 and the driven lock spring 49 store energy when the main lock pressing plate 31 and the driven lock pressing plate 42 are rotated.

[0050] Optionally, the primary lock spring 36 and the secondary lock spring 49 referred to herein can be selected as a torsion spring or a tension spring, of course, in the initial installation, each spring needs to be in a certain stretch state to ensure the firm stability between the connected components after installation.

[0051] When the vehicle is running on a bumpy road, the hood is subjected to various vibrations and impacts, but due to the elastic reset state of the primary lock spring 36 and the secondary lock spring 49 of the double linkage door lock, these external forces can be effectively buffered, ensuring that the hood door plate 6 is always firmly locked on the hood frame 5 and will not be accidentally opened due to vibration, avoiding the occurrence of abnormal noise during driving, also avoiding the problem of deformation caused by collision, and also ensuring driving safety.

[0052] In some embodiments, referring to Figures 1 to 4 A fourth trajectory hole 45 is provided on the secondary lock shell 41 to limit the movement trajectory of the fourth shaft 44, and the fourth shaft 44 limits the reciprocating swing amplitude of the secondary lock pressing plate 42 through the fourth trajectory hole 45. The fourth shaft 44 matched with the fourth trajectory hole 45 plays a guiding role in the rotation of the secondary lock pressing plate 42, preventing jamming during rotation, making the movement of the entire mechanism smoother and more reliable. Moreover, the swing amplitude of the secondary lock pressing plate 42 can be limited through the fourth trajectory hole 45, so that the swing amplitude of the primary lock pressing plate 31 can also be limited through the transmission rod 1, keeping the secondary lock pressing plate 42 and the primary lock pressing plate 31 within a reasonable swing amplitude range, avoiding excessive opening or pressing of the secondary lock pressing plate 42 and the primary lock pressing plate 31, and causing the connected springs to fail or damage the hood frame 5 caused by pressing.

[0053] In some specific application scenarios, when the fourth shaft 44 moves along the fourth trajectory hole 45 in the secondary lock shell 41, it can accurately control the reciprocating swing of the secondary lock pressing plate 42. Through the special shape and size design of the fourth trajectory hole 45, the movement trajectory of the fourth shaft 44 is effectively limited, thereby ensuring the stability and consistency of the secondary lock pressing plate 42 during swing. In this way, whether in a fast action cycle or in a long period of use, the secondary lock pressing plate 42 can swing back and forth according to the predetermined amplitude, without excessive or insufficient swing deviation, effectively improving the performance and reliability of the entire lock system.

[0054] Of course, since the secondary lock pressing plate 42 is a circular motion that swings back and forth around the second shaft 43, the fourth trajectory hole 45 is an arc-shaped hole.

[0055] In some embodiments, referring to Figures 1 to 4From the lock plate 42 and the lock shell 41 is also provided with the fifth shaft 46, and the lock shell 41 is also provided with the fifth trajectory hole 47 limiting the fifth shaft 46; wherein the fifth shaft 46 and the fourth shaft 44 are respectively located above and below the second shaft 43, so as to limit the swing amplitude of the from lock plate 42. Through the cooperation of the fifth trajectory hole 47 and the fifth shaft 46, the rotation of the from lock plate 42 is guided, preventing jamming during rotation, so that the movement of the entire mechanism is smoother and more reliable. Moreover, through the cooperation of the fifth trajectory hole 47 and the fourth trajectory hole 45, the swing amplitude of the from lock plate 42 can be limited, so that the swing amplitude of the main lock plate 31 can also be limited through the transmission rod 1, so that the from lock plate 42 and the main lock plate 31 are kept within a reasonable swing amplitude range, avoiding excessive opening or compression of the from lock plate 42 and the main lock plate 31, which may cause damage to the connected spring or the compression cover frame 5. Since the from lock plate 42 is a circular motion of reciprocating swing around the second shaft 43, the shape of the fifth trajectory hole 47 is an arc hole.

[0056] In the specific working process, when the from lock plate 42 reciprocates, the fifth shaft 46 moves along the fifth trajectory hole 47 accurately. Since the fifth shaft 46 and the fourth shaft 44 are respectively located above and below the second shaft 43, this layout effectively limits the swing amplitude of the from lock plate 42, so that it moves stably within a specified range. Through the cooperation of the fifth shaft 46 and the fifth trajectory hole 47, the movement of the from lock plate 42 can be ensured to be more accurate and reliable, which provides an important guarantee for the normal operation of the entire lock system. In different working scenarios and working conditions, this design can adapt to various needs, effectively improving the performance and stability of the door lock.

[0057] It should be noted that the naming of the fourth trajectory hole 45 and the fifth trajectory hole 47 in this application is unified according to the respective limiting shafts, and is not four or five trajectory holes.

[0058] In some embodiments, referring to Figures 1 to 4 The lock shell 41 is also provided with the sixth shaft 48, and the from lock spring 49 is connected between the sixth shaft 48 and the fifth shaft 46. The sixth shaft 48 provides support for the installation of the from lock spring 49, and the sixth shaft 48 is located above the fifth shaft 46, while the fourth shaft 44 is below the second shaft 43, so that when the from lock plate 42 is rotated to open, the from lock spring 49 is stretched to store energy, and when the from lock plate 42 is locked, the from lock spring 49 is elastically reset, so that the from lock plate 42 can compress the cover frame 5, realizing the locking of the cover door plate 6 and the cover frame 5.

[0059] In some embodiments, referring to Figures 5 to 10The handle 35 is provided with a limit plate 38, and the limit plate 38 is provided with a track groove 381. The main locking plate 31 is provided with a seventh axis 37 that is restricted by the track groove 381. The seventh axis 37, which cooperates with the track groove 381, guides the rotation of the main locking plate 31, prevents the main locking plate 31 from jamming during rotation, and makes the movement of the entire mechanism smoother and more reliable.

[0060] In some embodiments, see Figure 6 A return spring 39 is provided between the handle 35 and the first shaft 33; when released, the handle 35 is engaged with the main lock housing 34 under the elastic force of the return spring 39. The return spring 39 is installed between the first shaft 33 and the handle body 352. When the movable lock plate 353 is opened, the return spring 39 is stretched. When the handle 35 is released, the return spring 39 drives the handle body 352 to engage with the main lock housing 34.

[0061] The handle 35 involved in this application borrows from or adopts the same structure as the door handle 35. To more clearly understand the structure of the handle 35, a specific implementation of the handle 35 is provided below: [Combined with...] Figures 5 to 10 The handle 35 includes a handle body 352, a lock cylinder 351 disposed on the handle body 352, and a movable lock plate 353. The main lock housing 34 is provided with a locking hole 341 adapted to the movable lock plate 353. The return spring 39 is installed between the first shaft 33 and the handle body 352. When the movable lock plate 353 is opened, the return spring 39 is stretched. When the handle 35 is released, the return spring 39 drives the handle body 352 to be fastened on the main lock housing 34.

[0062] Lock cylinder 351 includes a fixed lock sleeve 3513 and a rotating core 3512 rotatably adapted within the fixed lock sleeve 3513. The rotating core 3512 is provided with an eccentric lever 3511 capable of moving the movable lock plate 353 toward or away from the locking hole 341. The movable lock plate 353 is provided with an elongated hole that cooperates with the movement of the eccentric lever 3511. Figure 9 and Figure 10 (It can be seen, but is not marked); the handle body 352 is also provided with a guide plate 354 that keeps the movable locking plate 353 moving linearly back and forth, and the guide plate 354 is provided with a guide groove that limits the handle body 352 (not marked in the figure).

[0063] The rotating core 3512 is provided with a key hole, a key is inserted into the key hole, the rotation of the rotating core 3512 is realized by rotating the key, and then the eccentric lever 3511 drives the movable lock plate 353 to insert into or move away from the locking hole 341, thereby unlocking the handle; when the hood door plate 6 needs to be unlocked, the key is inserted into the key hole, the movable lock plate 353 is moved away from the locking hole 341, and then the handle body 352 is pulled by hand, so that the driven lock 4 is synchronously unlocked by the driving lock 3. When the handle body 352 is released, the handle body 352 is reset and buckled on the main lock shell 34 under the action of the reset spring 39, and the driving lock 3 and the driven lock 4 are in the locked state under the action of the respective springs.

[0064] In some embodiments, referring to Figures 1 to 3 The guide block 2 is provided on the main lock shell 34, and the guide block 2 is provided with a guide hole (not marked in the figure) for the transmission rod 1 to pass through. The guide block 2 guides the transmission of the transmission rod 1 and prevents it from being deflected. The guide effect of the guide block 2 and the track hole makes the movement of the whole mechanism smoother and more reliable.

[0065] In the above embodiments, the description of each embodiment has its own focus, and the parts not described or recorded in a certain embodiment can be referred to the related description of other embodiments.

[0066] Based on the same inventive concept, the embodiments of the present application also provide a hood, referring to Figures 11 to 14 The hood includes a hood frame 5 and a hood door plate 6, the double linkage door lock is installed on the hood door plate 6, a main pressing plate for being pressed by the main lock pressing plate 31 is correspondingly arranged on the hood frame 5, a slave pressing plate for being pressed by the slave lock pressing plate 42 is correspondingly arranged on the hood frame 5, and the main pressing plate and the slave pressing plate are symmetrically arranged on the two sides of the hood frame 5.

[0067] The hood provided by the embodiments of the present application, because of adopting the double linkage door lock with the driving lock 3 and the driven lock 4 capable of synchronous unlocking or locking, greatly increases the locking force of the door lock, effectively solves the problem that the current door lock is difficult to lock the door plate firmly, avoids the shaking and noise between the hood door plate 6 and the hood frame 5, prolongs the service life of the hood door plate 6 and the reliability of the door lock, is more convenient to operate, has compact structure and high stability.

[0068] Based on the same inventive concept, the embodiments of the present application also provide an engineering machine comprising the hood.

[0069] The engineering machine provided by the embodiments of the present application, because of adopting the hood with the double linkage door lock, avoids the shaking and noise between the hood door plate 6 and the hood frame 5, prolongs the service life of the hood door plate 6 and the reliability of the door lock, and improves the brand value of the whole vehicle. For example, the engineering machine includes a loader, a excavator and the like.

[0070] The above merely describes preferred embodiments of the present application and is not intended to limit the present application, and any modification, equivalent replacement, and improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A double action door lock characterised in that, The application relates to a hood door lock, which comprises: a driving lock (3) installed on one side of a hood door plate (6); a driven lock (4) installed on the other side of the hood door plate (6) opposite to the driving lock (3); and a transmission rod (1) connected between the driving lock (3) and the driven lock (4), which drives the driven lock (4) to be unlocked or locked simultaneously with the driving lock (3) when the driving lock (3) is unlocked or locked. The driving lock (3) comprises a driving lock shell (34), a driving lock pressing plate (31), a handle (35) and a driving lock spring (36), the driving lock shell (34) is installed on the hood door plate (6), the driving lock pressing plate (31) and the handle (35) are connected to the driving lock shell (34) through a first shaft (33), and the driving lock spring (36) is connected between the first shaft (33) and the driving lock pressing plate (31).

2. The double door lock of claim 1, wherein The driven lock (4) comprises a driven lock shell (41), a driven lock pressing plate (42) and a driven lock spring (49), the driven lock shell (41) is installed on the hood door plate (6), the driven lock pressing plate (42) is connected to the driven lock shell (41) through a second shaft (43), and the driven lock spring (49) is connected between the driven lock shell (41) and the driven lock pressing plate (42). One end of the transmission rod (1) is connected to the driving lock pressing plate (31) through a third shaft (32), and the other end is connected to the driven lock pressing plate (42) through a fourth shaft (44); the driving lock pressing plate (31), the transmission rod (1), the driven lock pressing plate (42) and the hood door plate (6) jointly form a four-link mechanism. The handle (35) drives the driving lock pressing plate (31) to rotate through the first shaft (33), drives the driven lock pressing plate (42) to link through the transmission rod (1), so that the driven lock pressing plate (42) and the driving lock pressing plate (31) are pressed tightly or away from the hood frame (5) at the same time, and the hood door plate (6) is unlocked or locked; the driving lock spring (36) and the driven lock spring (49) are stretched when unlocking and are elastically reset when locking. The driven lock shell (41) is provided with a fourth track hole (45) limiting the movement track of the fourth shaft (44), and the fourth shaft (44) is limited to reciprocating swing amplitude through the fourth track hole (45).

3. The double door lock of claim 2, wherein The driven lock pressing plate (42) and the driven lock shell (41) are further provided with a fifth shaft (46), and the driven lock shell (41) is further provided with a fifth track hole (47) limiting the fifth shaft (46); wherein the fifth shaft (46) and the fourth shaft (44) are located above and below the second shaft (43) respectively, so as to limit the reciprocating swing amplitude of the driven lock pressing plate (42).

4. The double door lock of claim 3, wherein The driven lock shell (41) is further provided with a sixth shaft (48), and the driven lock spring (49) is connected between the sixth shaft (48) and the fifth shaft (46).

5. The double action door lock of claim 4 wherein, ​ 6. The double door lock of claim 2, wherein The handle (35) is provided with a limiting plate (38), the limiting plate (38) is provided with a track groove (381), and the main lock pressing plate (31) is provided with a seventh shaft (37) limited in the track groove (381).

7. The double door lock of claim 2, wherein A reset spring (39) is arranged between the handle (35) and the first shaft (33); after being loosened, the handle (35) is buckled on the main lock shell (34) under the elastic force of the reset spring (39).

8. The double door lock of claim 2, wherein The main lock shell (34) is provided with a guide block (2), and the guide block (2) is provided with a guide hole for the transmission rod (1) to pass through.

9. A cowling, characterized by, A double linkage door lock as claimed in any one of claims 1-8 is installed.

10. A working machine, characterized in that A canopy as claimed in claim 9 is included.

Images