JPH0416863Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial field of application] The invention provides a closing lock for an engine bonnet that can be opened and closed by swinging and is biased toward the lock position.
Between this locking tool and the engine bonnet side engaging tool with which the locking tool engages, the closing operation of the engine bonnet moves the locking tool from the locked position to the unlocked position. A release cam mechanism is provided for switching the lock to the unlocked state when the lock is moved to the side, and a release operation tool is arranged in the driving section separately from the release cam mechanism to release the locking tool from the locked state. This invention relates to an engine bonnet lock device.

[Conventional technology]

Conventionally, in the above engine bonnet locking device, simply by closing the engine bonnet, the bonnet is automatically closed and locked by the action of the cam mechanism and the automatic return of the locking tool to the locked position. Therefore, as a release operation tool, an electric linkage mechanism is used in which the locking tool can only be operated by the release side, or one in which the locking tool and the release operation tool are linked with a release wire so that only the release operation is possible. It was getting worse.

[The problem that the idea attempts to solve]

The conventional structure configured as described above had the following drawbacks.

That is, depending on the method of closing the bonnet, for example, the bonnet closing force may be released before the locking tool fully engages with the bonnet side engaging part.
Due to the operating resistance of the locking tool caused by the friction between the locking tool and the engaging tool and the elastic restoring force of the sealing material that increases this friction, the bonnet will automatically close when the locking tool is released. In order to open the bonnet slightly and create a gap between the bonnet and the fuselage to insert a hand to open the bonnet, or to disable the locking tool from engaging with the engaging tool to restore it to the locked position. If a spring is provided that biases the bonnet in the closed and locked state toward the open side, the biasing force of this spring will further increase the operating resistance of the locking tool, so that the engagement of the locking tool may remain shallow. It may become.

Even if this locking failure occurs, the engine bonnet is in the predetermined closed state or very close to this, and the release operating tool has already returned to the position for locking the bonnet, so the locking failure is not noticed and the running vibration The bonnet lock sometimes came off unexpectedly due to such reasons.

The purpose of the present invention is to make it easy to determine whether there is a lock defect without requiring a special detection and display mechanism, and to easily adjust the lock when a lock defect occurs.

[Means to solve the problem]

The technical means of the present invention taken to achieve the above object is to provide a closing lock for an engine bonnet that can be opened and closed by swinging and biased toward the locking position, and the locking mechanism engages with the locking mechanism. and an engine bonnet-side engaging tool, the locking tool is switched from a locking state in a locking position to an unlocking state in which it is moved to an unlocking position by the closing operation of the engine bonnet. In an engine bonnet lock device, a release cam mechanism is provided, and a release operating tool for releasing the locking state of the locking tool is disposed in the operating section separately from the releasing cam mechanism, and the locking tool and A linkage mechanism that links the release operation tool,
By connecting an interlocking member that can be pushed and pulled in the front-back direction to the release operating tool, the locking tool is configured as a mechanical mechanism that can be forcibly moved toward the locking side by operating the release operating tool. At the same time, the locking surface of the locking tool and the engaging tool is configured to act to further pull the engaging tool toward the bonnet closing side as the locking tool slides toward the engaging portion of the locking tool. A locking cam mechanism comprising a pair of formed cam portions is provided.

[Effect]

As a result of taking the above technical measures, the following effects can be obtained.

Since the interlocking mechanism is mechanically constructed, when the locking tool is in the predetermined locking position, the release operation tool is also in the predetermined locking position, and if the locking tool's operating stroke toward the lock side is insufficient, the locking tool will be released. The operating tool also comes to be located closer to the unlocked position than the predetermined locked position.

Then, by operating the locking cam mechanism by operating the release tool toward the lock side, it is possible to forcibly move the locking tool, and in other words, the bonnet, toward the closing side, so if a lock failure occurs, To,
It becomes possible to operate the engine bonnet to a predetermined lock position while being in the operating section.

This makes it possible to determine whether or not there is a lock failure in the bonnet based on the position of the release operation tool while remaining in the riding position, and to re-lock the lock if there is a lock failure. Other mechanisms become unnecessary.

Furthermore, since the linkage mechanism is composed of interlocking members that move in the front-rear direction, all that is needed is to provide holes for the linkage members that pass through the partition wall that separates the driving section and the engine bonnet back and forth. If desired, the partition wall can be set so that no gaps appear as much as possible, and the engine bonnet can be well sealed, making it difficult for noise to be transmitted.

[Effect of idea]

As a result, the engine bonnet can be reliably locked from the operating section without deteriorating the shielding properties of the engine bonnet, allowing safe driving and providing an engine bonnet locking device that is convenient for operation. We were able to.

This is extremely useful because it avoids the trouble of having to go to the driving part and relocking the lock when there is a lock failure, or of having to reach out from the driving part to the driving part in an unreasonable position to relock the lock. It is effective for

〔Example〕

As shown in Fig. 6, there is a driving section having an engine bonnet 1 with a downward U-shaped cross section that can swing open and close up and down around an axis P on the front end side, and an engine bonnet located at the rear of this driving section. A lift arm 3 and a rotary connector 4 that connect various devices such as a rotary tiller to the rear of a wheeled traveling body having a driving section 2 so as to enable lifting and rolling operations, and power transmitted to the connecting work device. An agricultural tractor is constructed by providing a take-out shaft 5.

As shown in FIGS. 1 to 3 and 5, a hook is attached to the inner surface of the top plate portion 1a of the engine bonnet 1 through a fixture consisting of an upper plate member 6b and a lower plate member 6a. A locking tool 8 that connects the mold engaging tool 7 and acts on the engaging tool 7 to close and fix the engine bonnet 1 is attached to the engine bonnet 1.
The support portion 10a of the fuselage frame 10 is configured to receive and support the free end portion of the fuselage frame 10 via the sealing material 9.
It is attached so that it can slide in the front and rear directions of the fuselage.

The locking tool 8 is biased by the spring 11 to a locked position in which the distal end enters the lifting path of the engaging tool 7, and the locking tool 8 is connected to the locking tool 8 from the swing link 12 and the push/pull rod (corresponding to the interlocking member) 13. A release operation tool 15 interlocked via a mechanical linkage mechanism 14 consisting of
It is slidably attached to the bottom of the. The locking tool 8 has an upwardly inclined surface 8a, and the engaging tool 7
A cam mechanism 17 is provided in which the locking member 8 is released against the spring 11 when the engine bonnet 1 is closed.

A bonnet opening spring (corresponding to an elastic member) 19 is provided between a spring receiver (corresponding to a bonnet support side member) 18 slidably fitted onto the engaging tool 7 and the fitting. , so that the engine bonnet 11 is automatically locked when the engine bonnet 1 is closed, and when the locking device 8 is released, the engine bonnet 11 is automatically opened by a set stroke; ,
The release operation tool 15 can be used to determine whether or not the locking tool 8 is engaged improperly, and the release operating tool 15 can also adjust the locking tool 8 that is in the improperly engaged state to the proper engagement state.
It is configured so that it can be done by.

That is, as the engine bonnet 1 is lowered, the engaging member 7 is lowered while pushing the locking member 8 toward the release side due to the bonnet lowering force and the cam mechanism 17. When the engine bonnet 1 reaches the closed position in contact with the sealing material 9, the engaging tool 7 reaches the lower part of the locking tool 8, and the locking tool 8 is automatically restored to the locked position by the spring 11, and the locking tool 8 is automatically restored to the locked position by the spring 11. It engages with the tool 7 in such a way that it cannot be raised.

When the engine bonnet 1 is in the closed state, the spring receiver 18 is pushed up by the receiving plate 20 fixed to the support portion 10a beyond the position of the pair of engaging tools when the bonnet is open, and the spring 19 is compressed and elasticized. It transforms it. The compressed spring 19 then biases the engine bonnet 1 toward the sealing material 9 in the locked state.
To suppress the rattling and to move the engaging tool 7 to a higher level position than the locking tool 8 in order to make it impossible for the locking tool 8, which returns to the locked position after the release operation, to re-engage. It is also useful as a means of In other words, in the unlocked state,
The engine bonnet 1 is urged upward to the open position where the locking tool 8 and the engaging tool 7 are separated vertically by a predetermined distance and the engagement between the locking tool 8 and the engaging tool 7 is released. In the upwardly biased state, the engine bonnet 1 and the fuselage frame 1
This creates a gap between the driver and the driver to insert their hand in order to open the bonnet.

When the locking tool 8 reaches the locking position where it engages with the engaging tool 7 at a predetermined depth, the release operating tool 15 moves to the locking position L.
When the locking tool 8 is at an engagement position shallower than a predetermined depth, the releasing operating tool 15 is moved to a position closer to the unlocking position 0 than the locking position L, and the releasing operating tool 15 is The locking tool 8 and the release operating tool 15 are arranged so that when the locking tool 8 is operated toward the locking position L, the locking tool 8 slides toward the lock side.
are interlocked and connected by the linkage mechanism 14.

The locking surface between the locking tool 8 and the engaging tool 7 is designed so that as the locking tool 8 slides toward the engaging tool 7 in the approaching direction, the engaging tool 7 is further pulled toward the bonnet closing side. A locking cam mechanism 17' is provided which comprises a pair of formed cam portions.

That is, the locking tool-side locking surface 8b, which is the bottom surface of the locking tool 8, is a horizontal surface, and the locking tool-side locking surface 7b, which is the top surface of the locking tool 7, is sloped downward to the right in FIG. The release operating tool 15 is formed on each surface (slanted surface such that the engaging tool 7 is pushed down as the engagement depth of the locking tool 8 becomes deeper).
By adjusting the engagement depth of the locking tool 8, the pressing force of the engine bonnet 1 against the sealing material 9 can be adjusted.

As shown in FIGS. 3 and 5, engagement members 22 are attached to the inner surfaces of the left and right side plate portions 1b, 1b of the engine bonnet 1 via fittings 21, respectively. Then, a pair of left and right engaging tools 2 are provided.
When the engine bonnet 1 is closed and lowered, each of the cylinders 2 and 22 enters and engages with the cylinder 23 attached to the fuselage frame 10, and when the engine bonnet 1 is in the closed state, the lower end side and the upper end side are connected to the cylinder body 23. The cylindrical body 2 is configured to suppress the vibration of the side plate portion 1b against the inner surface of the body 23, and when the engine bonnet 1 is opened and raised, the cylindrical body 2
It is configured so that it climbs up and leaves from 3.

The cylindrical body 23 is formed to have tongue portions 23a on both upper and lower sides for inserting and guiding the engaging tool 22 so that it can be used for both the left side and the right side.

[Brief explanation of drawings]

The drawings show an embodiment of the engine bonnet lock device according to the present invention, and FIG. 1 is a partially cutaway side view of the lock device, FIG. 2 is a sectional view taken along the line II--II in FIG. The figure is a front view of the engine bonnet fixing part, Figure 4 is a partially cutaway front view of the engine bonnet steady rest part, Figure 5 is a plan view of the locking tool and cylinder body arrangement part, and Figure 6 is a front view of the engine bonnet steady rest part. FIG. 2 is a partially cutaway side view of the entire agricultural tractor. 1...Engine bonnet, 2...Driver section, 7
...Engaging tool, 8... Locking tool, 7b, 8b... Locking surface, 13... Interlocking member, 14... Interlocking mechanism, 15... Release operating tool, 17... Cam mechanism for release, 17 '... Locking cam mechanism, 18... Bonnet support side member, 19... Elastic member.

Claims (1)

[Claims for Utility Model Registration] 1. An engine bonnet in which a closing locking device 8 of an engine bonnet 1 which can be opened and closed by swinging is biased toward the locked position, and the locking device 8 engages with the engine bonnet. When the engine bonnet 1 closes, the locking tool 8 is switched from the locking state in the locking position to the unlocking state in which it is moved to the unlocking position. This engine bonnet lock device is provided with a release cam mechanism 17, and in addition to the release cam mechanism 17, a release operating tool 15 for releasing the locking state of the locking tool 8 is arranged in the operating part 2. In addition, by connecting the linking mechanism 14 that links the locking tool 8 and the release operating tool 15 with the linking member 13 that can be freely pushed and pulled in the front-rear direction to the release operating tool 15, the release operating tool 15 The locking mechanism is configured to be a mechanical mechanism capable of forcibly moving the locking tool 8 to the locking side by the operation of As the tool 8 slides toward the engagement tool,
An engine bonnet locking device provided with a locking cam mechanism 17' consisting of a pair of cam portions formed to further draw the engaging member 7 toward the bonnet closing side. 2. The engine bonnet 1, which is in the closed and locked state due to the engagement between the locking tool 8 and the engaging tool 7, is locked when the locking tool 8 and the engaging tool 7 are spaced apart vertically by a predetermined distance. An elastic member 19 is provided between the fitting on the engine bonnet 1 side and the bonnet support side member 18, and the elastic member 19 presses and urges the tool 8 and the engagement tool 7 to a released position where the engagement is released. An engine bonnet lock device according to claim 1 of a certain utility model registration.