JPS5847175Y2 - Vehicle door rattling prevention latch mechanism - Google Patents

Description

[Detailed description of the invention] The body of an earthwork vehicle such as a motor grader, bulldozer, etc. usually has one or more doors in the compartment where batteries, etc. are taken in and out, or in order to access the inside of the vehicle body. are doing.

Vehicles like the ones mentioned above are often worked under harsh conditions, so if the door is not tightly closed, things inside the door may be damaged during work, or if the door is loose, it may be difficult to operate the vehicle. This can cause people to become distracted and the door to wear out prematurely.

Conventional latching mechanisms have not been able to overcome all of these conditions.

Additionally, conventional complex latching mechanisms have the disadvantage that they tend to become clogged with dust and dirt due to harsh working conditions, increasing maintenance costs and manufacturing costs.

The main purpose of this invention is to be simple and inexpensive, and to prevent the door from rattling while the vehicle is in operation.The main purpose of this invention is to automatically lock the door when the door is closed while the vehicle is in operation, and to prevent the door from protruding from the outside of the vehicle. To provide an employment latch mechanism pivotally mounted on the body of an earthmoving type vehicle in which a door is easily and quickly released for easy access to parts or internal mechanisms.

Another object of the present invention is to provide a latching mechanism configured for use with a wide variety of different door constructions located at various locations on the body of an earthmoving model vehicle.

According to the present invention, an anti-rattle mechanism is provided for automatically and releasably locking a door movable through a passageway from a fully open position to a fully closed position to a body part.

The mechanism has first and second rigid support members, one support member configured to be attached to the door, and the other support member configured to be attached to the door.
It is configured to be attached to the vehicle body.

A cylindrical pin is secured to and projects from the first support member, the axis of the pin extending perpendicular to a given path of movement of the door.

The cam hook member is attached to the second support member so as to pivot about an axis parallel to the axis of the pin.

A spring device pivots about the axis to bias the cam hook member, and an actuation device is provided to selectively pivot the cam hook member about the axis in an opposite direction.

The second support member is located on one side of the extended passageway defined with respect to the center of the pin when the door moves from its fully open position to its fully closed position, and on the outer periphery of the pin when the door is in its fully closed position. It has an abutment surface configured to engage.

The cam hook member has a cam surface configured to engage the outer periphery of the pin as the door approaches its fully closed position as it is pivoted in a direction opposite to the direction in which it is biased to pivot by the spring device. ing.

The cam surface of the cam hook member terminates in a hook surface configured to receive the pin when the door is in the fully closed position, the hook surface being substantially opposite to the engagement of the outer periphery of the pin by the abutment surface of the second support member. The pin is compressively engaged with the outer periphery of the pin under the bias of a spring device at the point .

The capture of the pin by the cam hook member against the abutment surface of the second support member is configured to support the free end of the door, thereby preventing rattling of the door.

The above objects and other objects and features of the present invention will become clearer from the following description with reference to the accompanying drawings.

As shown in FIG. 1, the latch mechanism 10 of the present invention is structurally simple and has only two moving parts.The latch mechanism 10 includes first and second support members 11 and 12. .

One of the support members 11.12 is configured to be attached to the body of the vehicle, and the other of the support members 11.12 is adapted to be moved relative to the vehicle body from a fully open position to a fully closed position, as will be explained in more detail below. It is configured to be attached to a door movable through a given passageway.

A cylindrical pin 13 is fixed to the first support member 11, and the axis of the pin 13 extends perpendicular to the path through which the door moves from its fully open position to its fully closed position.

The cam footer member 14 is attached to the second support member 12 so as to pivot about the axis of a shaft 15 fixed to the second support member 12.

As shown in FIG. 1, the cam hook member 14 includes a first portion 16 extending from a pivot axis about a shaft 15 and forming a cam surface 17 and a hook surface 18. As shown in FIG.

Cam hook member 14 has a second or shank portion 19 extending laterally from first portion 16 from its pivot axis.

A spring device in the form of a tension spring 20 having one end connected to the shank portion 19 of the cam hook member 14 and the other end secured to the second support member 12 is pivoted counterclockwise as shown in FIG. 15, which urges the cam hook member 14 to rotate about its axis.

An actuating device in the form of a plunger or rod 21 mounted for axial sliding movement relative to the support member 12 is
It is configured to engage the shank portion 19 of the cam hook member 14 so as to selectively pivot the cam hook member 14 in the opposite direction or clockwise as shown in FIG. 1 against the bias of the tension spring 20.

The end of the second support member 12 includes an abutment surface 22 configured to engage the outer periphery of the pin 13 when the door using this latch mechanism is in the fully closed position.

Therefore, referring to FIG. 2, the latch mechanism 10 of FIG.
It is illustrated with a support member 11 .

The door 23 is shown in its fully closed position, with the abutment surface 22 of the second support member 12 engaging the outer periphery of the pin 13.

The hook surface 18 of the cam hook member 14 is urged into compressive engagement with the outer periphery of the pin 13 opposite the engagement of the pin with the abutment surface 22 by the action of the tension spring 20.

The pin 13 is thus captured between the abutment surface 22 and the hook surface 18, and the friction of these surfaces on the outer periphery of the pin 13 tends to support the door 23 against movement in any direction. , This prevents the door from rattling.

To open the door, the plunger or rod 21 is
The cam hook member 14 is moved axially relative to the shank portion 19 of the member 14 such that the cam hook member 14 is pivoted clockwise about the shaft 15 against the force of the tension spring 20.

When the cam hook member 14 rotates clockwise, the pin 13 is released and the door 23 can be opened.

When the door is closed again, the outer circumference of the pin 13 engages the cam surface 17 of the cam hook member 14, again rotating the cam hook member 14 clockwise until the pin 13 is again captured as shown in FIG. .

3 and 4, it is understood that, subject to certain limitations, the cam hook member of the latching mechanism of the present invention, together with its cam and hook surfaces, as well as the abutment surface of the second support member, may take on a variety of shapes. I understand.

The cam surface of the cam hook member is optionally configured to pivot the cam hook member against the force of the tension spring 20 when engaged with the pin 13 so as to capture the pin when the door is closed, as described above. It may be an inclined or curved surface.

FIG. 3 schematically shows the restriction of the hook surface and abutment surface of the latching mechanism of the present invention to the cylindrical pin 13.

Accordingly, a plan view of the cylindrical pin 13 is shown in FIG.

Dashed line 30 indicates the path of relative movement between the center of pin 13 and other elements of the latch mechanism as the door moves from its fully open position to its fully closed position.

The dashed line 31 shows the extension of the passage 30 beyond the fully closed position of the door, and the dotted line 32 shows the extension of the passage 30 perpendicular to the passage 30 and its extension 31.
It is a straight line passing through the center of 3.

The chain line 33 is a straight line passing through the center of the axis 5 which is the center of rotation of the cam hook member of the latch mechanism of the present invention or a given axis, and the center of the cylindrical pin 13.

Arrow 34 indicates the abutment of pin 13 on the abutment surface of the second support member.

Arrow 35 indicates compressive engagement of the hook surface of the cam hook member to the outer periphery of pin 13 opposite abutment 34.

According to the present invention, the abutment 34 of the pin 13 and the compression engagement 35
must occur on opposite sides of the extended passageway 30.31 of the relative movement between the pin 13 and the rest of the latching mechanism.

Also, according to the invention, the abutment 34 of the outer circumference of the pin and the compression engagement 35 must occur on opposite sides of the dotted line 32.

Finally, according to the present invention, the abutment 34 is on the side of the straight line 33 passing through the axis of the shaft 15 and the center of the pin 13 in the direction in which the cam hook member pivots, and is in the same straight line as the axis of the shaft 15. 32
must occur on the side of the

However, as shown in FIG. 4, the abutment 34 and compressive engagement 35 are not necessarily limited to point contact as suggested in FIG. 2, but may be distributed over a considerable arc around the circumference of the pin 13. good.

Referring to FIG. 4, there is shown a latch mechanism 40 according to another embodiment of the present invention similar to the embodiment of FIG.

The latch mechanism 40 of FIG. 4 includes a first support member 11 and a cylindrical pin 13 that are substantially identical to the corresponding elements of the latch mechanism 10 of FIG.

However, the latch mechanism 40 includes a second support member 1 having an abutment surface 42 that engages a substantial portion of the outer circumference of the pin 13.
2'.

Similarly, the cam hook member 44 of the latch mechanism 40 is connected to the pin 1
3 has a hook surface 48 that engages a substantial portion of the outer circumference of 3.

A cam hook member 44 of the latch mechanism 40 has a first portion 46 that pivots about the axis of the shaft 15 and has a cam surface 47 terminating in a hook surface 48 similar to the corresponding element of the latch mechanism 10.
It is equipped with

The cam hook member 44 also has a second portion 49 extending perpendicularly to the first portion 46 and having a tension spring 20 connected to urge the member to pivot counterclockwise about the axis 15. We are prepared.

Bundle 41 coupled to cam hook member 44 is provided to selectively pivot cam hook member 44 clockwise about axis 15 against the force of tension spring 20.

Bundle 41 may be mounted on a shaft extending outside the body of the vehicle to conveniently operate latch mechanism 40.

Referring to FIGS. 3 and 4, according to the present invention, the pin 13
The abutment 34 on the outer periphery of the cam hook member 44 must occur on the portion of the outer periphery of the pin 13 between the dashed line 31 and the dotted line 32 on the side of the chain line 33 in the direction in which the cam hook member 44 is urged to move by the tension spring 20. No.

Also, according to the present invention, the compression hook engagement 35 is abutment 34
It must occur at a portion of the outer periphery of the pin 13 between the broken line 30 and the dotted line 32, opposite to.

However, as shown by the contact surface 42 in FIG.
4 may be distributed over the portion of the outer periphery of the pin 13 between the dotted line 32 and the chain line 33 in the embodiment of the present invention.

If this abutment extends beyond the dotted line 32 and below the dashed line 30, it will attempt to prevent the door from opening or closing, and if the abutment extends towards the dotted line 32 and beyond the dashed line 33, it will reduce the compressive grip of the pin 13.

Similarly, as shown by hook surface 48 in FIG. 4, compression hook engagement 35 may be distributed over the portion of the circumference of pin 13 that lies between dashed line 30 and chain line 33 in embodiments of the present invention.

If the hook engagement 35 were to extend counterclockwise beyond the dashed line 30, it would tend to prevent the release and capture of the pin 13 during opening and closing of the door, and the compression engagement 35 would extend clockwise beyond the dashed line 33. If extended, this would tend to reduce the compressive grip of the pin and prevent pivoting of the cam hook member about its axis.

Referring to FIGS. 5, 6, and 7, an embodiment 50 of the door latch mechanism of the present invention is illustrated in detail as being attached to a door of a compartment formed in the body of a vehicle. .

For the purpose of ease of understanding and clarity of this Example 50,
Reference numbers in FIGS. 1 and 2 are used to indicate similar elements of latch mechanism embodiment 10.50.

As clearly shown in FIGS. 5 and 6, the first support member 11 supporting the cylindrical pin 13 is mounted on the body 24 of the vehicle.

The second support member 12 supporting the cam hook member 14 is attached to a door 23 which is pivotally connected at 25 to the body 24 of the vehicle.

Therefore, in embodiment 50 of the latch mechanism of the present invention, the two parts of the latch mechanism are attached to the door and the body in opposite ways, and the axis of the hinge is not parallel to the axis of the pin of the latch mechanism. It differs from the tenth embodiment shown in FIGS. 1 and 2 in that it is vertical.

According to the 50th embodiment of the latch mechanism of the present invention, the second support member 12, the cam hook member 14, the tension spring 20,
The parts of the latch mechanism comprising the actuating device with the plunger 21 are assembled as a unit with a door bundle 51 which can be mounted in a suitable cutout 52 in the door 23.

Door bundle 51 has a rectangular flanged cup 53 received through a cutout or opening 52 and secured to door 23 around opening 52 .

The bottom of the cup 53 has a hole for receiving the plunger 21 which passes through the cup 53 in a sliding fit towards one end thereof.

The second support member 12 is in operable relation to the cup 5 with respect to the plunger 21 such that the cam hook member 14 supported by the second support member is engageable with the plunger 21 as described above.
It is fixed to the external side of 3.

The rectangular cup 53 has a T-shaped web 54 within its opening, a lateral par 55 of the web 54 extending laterally of the rectangular cup 53 adjacent to the plunger 21 , and a leg 56 of the web 54 extending from the plunger 21 . They extend spaced apart from each other toward the ends of the cup 53 and along the longitudinal axis of the cup 53 .

The door bundle 51 having a rectangular cup 53 and a T-shaped web 54 is designed so that the legs 56 of the T-shaped web are grasped by the fingers of an average person's hand and the plunger 21 is operated with the thumb of that hand. Dimensions are determined as required.

Therefore, referring to FIG.
cam hook member 14 is moved from the position shown in solid lines to the position shown in phantom lines against the force of tension spring 20 to release latch mechanism 50 such that cam hook member 14 can be pivoted about hinge 25 to its open position. 14 and is pressed inward with the thumb.

As clearly shown in FIGS. 5 and 7, the door bundle 51 may be provided with a simple key-operated locking mechanism 57.

The locking mechanism 57 has a dog 58 located in an interfering relationship with a flange 59 formed at the free end of the plunger 21.
The plunger 21 is prevented from being operated unless the shaft is rotated with a key to move the dog 58 due to interference with the flange 59.

As shown in FIG. 5, door bundle 51 is positioned for convenient operation by a right-handed person.

However, by installing the door bundle 51 so that the legs 56 of the T-shaped web extend vertically, the door bundle 51
is usefully used by right-handed and left-handed people alike.

In this regard, in the latch mechanism of the present invention, the axis of the pin 13 is either parallel to the axis of the hinge 25 as shown in FIG. 2, or perpendicular to the axis of the hinge 25 as shown in FIG. It can be installed anywhere.

If the axis of pin 13 is perpendicular to the axis of hinge 25, the path of relative motion between the center of pin 13 and the rest of the hinge mechanism will not form an arc as shown in FIG. , forming a horizontal straight line passing through the center of the pin 13 shown in FIG.

Relatively large radius passage 30.31 and pin 1 in FIG.
3 is negligible in terms of distance of intersection with the outer circumference of pin 13, and therefore the structural considerations for the latch mechanism are is the same whether it extends parallel or perpendicular to the axis of the arc, so that it is recognized that the door can be pivoted from its fully open position to its fully closed position perpendicular to the arc or radially of the arc, respectively.

Referring to FIG. 8, another embodiment 60 of the latch mechanism of the present invention is illustrated, except that a torsion spring 62 is used in place of the tension spring 20 of embodiment 50. This is the same as the embodiment 50 of FIGS. 5, 6, and 7.

The use of torsion springs 62 simplifies the construction of door bundle 51 somewhat.

The plunger 21 is returned to its inactive position by the force of the tension spring 20 of the 50th embodiment or the torsion spring 62 of the 60th embodiment.

From the foregoing, it will be appreciated that a very simple and highly versatile door latch mechanism is provided by the present invention.

This door latch mechanism has an automatic locking feature and acts to prevent the door from rattling while the vehicle is in operation.

The gripping action of the latch mechanism on the cylindrical pin acts to support the door.

This gripping action also tends to dampen any vibrations experienced by the door due to the frictional forces created on the outer periphery of the pin due to the capture between the abutment surface and the hook surface of the cam hook member.

Because the latching mechanism of the present invention has only two moving parts, it is less susceptible to wear and jamming from dirt and mud under the harsh environmental conditions encountered during vehicle operation.

This latching mechanism is configurable for quick and easy installation on a wide variety of compartment doors of different configurations that are common on a single large earthmoving vehicle.

This latching mechanism may be configured, without undue expense, to lock a compartment containing an object to be inserted or removed, such as a battery, and its use may be used to lock a compartment containing an object to be inserted or removed, such as a battery. Reduce the amount of noise generated by the room door.

[Brief explanation of drawings]

Fig. 1 is an exploded perspective view of the main elements of a latch mechanism according to an embodiment of the present invention, Fig. 2 is a plan view of the above mechanism attached to a vehicle door, and Fig. 3 shows the structural features of the above mechanism. An enlarged plan view of a cylindrical pin for explanation, FIG. 4 is a second example of another embodiment.
FIG. 5 is an elevational view of another embodiment of the invention in which the pin of the latch mechanism is attached to the body of the vehicle and the remainder of the latch mechanism is attached to the door; FIG. 6 is a partial view similar to that shown in FIG. is same as VI-V
7 is a sectional view taken along the line Vll--Vll of FIG. 5, and FIG. 8 is similar to FIG. 6 with a different spring device for biasing the latch mechanism into its locked position. This is a partial diagram. In the diagram, 10, 40, 50.60 are latch mechanisms, 11
is a first support member, 12.12' is a second support member, 13 is a cylindrical pin, 14.44 is a cam hook member, 17 is a cam surface, 18.48 is a hook surface, 20 is a tension spring, 21 is a plunger, 22. 42 is a contact surface, 23 is a door, 24 is a vehicle body, 52 is a cutout, 53 is a cup with a rectangular flange, 54 is a T-shaped web, 55 is a horizontal bar, 56 is a leg, 62 is a twist Showing a spring.

Claims (7)

[Scope of utility model registration request] (1) In a rattling prevention mechanism that automatically releasably locks a door to a vehicle body so as to perform a turning motion through a given arc from a fully open position to a fully closed position, (a) first and second rigidity one of the members is configured to be attached to the door, and the other member is configured to be attached to the vehicle body; (C) a cylindrical pin projecting from the first support member with an axis extending perpendicular to a given path of motion; and (C) pivoting about a given axis parallel to the axis of the pin. a cam hook member mounted on the second support member for movement; (d) a spring device biasing the cam hook member to pivot in a given direction about the given axis;
e) an actuator for selectively pivoting the cam hook member in a direction opposite to the given direction about the given axis, the second support member being in a fully closed position of the door; a side portion in a direction that urges the cam hook member to move in the given direction by the spring device, which is a straight line defined by the axis of the pin and the given axis of the pivoting movement of the cam hook member; and has an abutment surface configured to abut against the outer periphery of the pin at a side of the pin that is the same as the given axis of rotation of the cam hook member, and the cam hook member When approaching the closed position, the cam hook member is engaged with the outer periphery of the pin so as to pivot the cam hook member in a direction opposite to the given direction about the given axis against the bias of the spring device. a cam surface configured to do so, and when the cam surface is in the fully closed position of the door, the contact surface of the second support member contacts the outer periphery of the pin at a location substantially opposite to that of the contact surface of the second support member; A mechanism terminating in a hook surface configured to compressively engage the outer periphery of the pin to receive the pin under the bias of the spring device. (2) Utility Model Registration Scope of Claim 1 In the mechanism described in claim 1, when the door is pivoted to the vehicle body so as to perform a turning movement about one axis, and when the axis is projected on the iron door, the projection A mechanism perpendicular to the axis of said cylindrical pin which is extended as required for. (3) Utility model registration In the mechanism according to claim 1, the first support member is attached to the vehicle body, and the second support member is attached to the vehicle body.
A mechanism for attaching a support member to the door. (4) Utility Model Registration The mechanism according to claim 3, wherein the actuating device includes a plunger configured to engage the cam hook member. (5) Utility model registration The mechanism according to claim 4, comprising a flanged rectangular cup configured to be accommodated in the cutout of the door, the flange of the cup extending around the outer periphery of the cup. secured to the door, the bottom of the cup having a hole at one end to receive the plunger in a sliding fit; the second support member secured to the cup adjacent to the plunger; is operated relative to the cam hook member such that an opening in the rectangular cup includes a transverse bar extending laterally of the cup and a leg extending along the longitudinal axis of the cup to an end of the cup remote from the plunger. A mechanism comprising a T-shaped web. (6) Utility Model Registration The mechanism according to claim 1, wherein the spring device is a torsion spring positioned so as to be able to act around a given axis of pivoting movement of the cam hook member. (7) Utility Model Registration Scope of Claim 1 In the mechanism according to claim 1, the abutment surface of the second support member is limited by the axis of the pin and the axis of the cam hook member to which the pivoting movement is applied. an axis of pivoting movement of the cam hook member extending from the intersection of the straight line with the outer circumference perpendicular to the given path of movement of the door to the intersection of a straight line passing through the axis of the pin with the outer circumference; A mechanism that abuts a significant portion of the outer periphery of the pin on the same side of the pin as the core.