CN219101009U - Cab door lock and engineering machinery - Google Patents

Abstract

The utility model relates to the field of engineering machinery, and provides a cab door lock and engineering machinery, comprising: the unlocking handle is arranged at the bottom of the cab door; the base is used for being connected with the cab; the unlocking handle is hinged on the base through a hinge shaft; one end of the unlocking handle is close to a cab gate to form a holding part, the other end of the unlocking handle is a working part, and the hinge shaft is positioned between the holding part and the working part; the transmission piece is used for transmitting and connecting the working part and the unlocking part of the latch so that the unlocking part can follow up with the rotation of the working part and unlock the latch. So set up, no matter the staff is located the driver's cabin or outside the driver's cabin, the portion of gripping all is located the staff's of being convenient for reach, and the staff on ground only need lift one's hand can operate the portion of gripping, and need not to go deep into the driver's cabin inside with the hand and carry out the unblock operation, has reduced the number of times that the staff stepped on the bus, has improved the convenience of unblock.

Description

Cab door lock and engineering machinery

Technical Field

The utility model relates to the technical field of engineering machinery, in particular to a cab door lock and engineering machinery.

Background

At present, an outer door lock is generally arranged on a cab of an engineering vehicle such as a land leveller and the like, so that the door is fixed after the door is opened, and most commonly, a lock catch is used together with a latch, namely, the lock catch is fixed on the door, the latch is fixed outside the cab, and after the door of the cab is opened, the latch is locked with the lock catch to fix the position of the door.

When the locking of the vehicle door is fixed, the vehicle door needs to be unlocked by being provided with a corresponding unlocking structure. In the related art, the unlocking structure is generally an unlocking handle arranged on the latch, the unlocking handle is positioned in the cab and is connected with a lock tongue of the latch, and a worker can unlock the vehicle door by operating the unlocking handle.

However, engineering machinery vehicle bodies such as graders are generally high, workers stand on the ground and are difficult to operate an unlocking handle in a cab, and in order to unlock a vehicle door, the workers need to repeatedly log in the cab by means of a boarding ladder, so that the operators stretch hands into the cab to operate the unlocking handle, and the unlocking convenience of the vehicle door is poor.

Disclosure of Invention

The utility model provides a cab door lock and engineering machinery, which are used for solving the defect that in the prior art, a worker needs to repeatedly log on a car when unlocking the car door, and improving the convenience of unlocking the car door.

The utility model provides a cab door lock, comprising:

the unlocking handle is arranged at the bottom of the cab door;

the base is used for being connected with the cab; the unlocking handle is hinged to the base through a hinge shaft; one end of the unlocking handle is close to a cab door to form a holding part, the other end of the unlocking handle is a working part, and the hinge shaft is positioned between the holding part and the working part;

the transmission piece is used for transmitting and connecting the working part and the unlocking part of the latch so that the unlocking part can follow up with the rotation of the working part and unlock the latch.

According to the cab door lock provided by the utility model, the cab door lock further comprises an elastic reset structure for driving the unlocking handle to reset, and the elastic direction of the reset structure is opposite to the rotation direction of the working part.

According to the cab door lock provided by the utility model, the reset structure comprises a connecting part and a reset spring; the connecting part is arranged on the base, the connecting part is positioned above or below the working part, and two ends of the reset spring are respectively connected with the working part and the connecting part.

According to the cab door lock provided by the utility model, the cab door lock further comprises a limiting structure for limiting the rotation angle of the working part.

According to the utility model, the limiting structure comprises:

the mounting part is arranged on the base and is provided with a limiting hole;

the bending part is formed at one end of the working part, which is away from the holding part, and is positioned in the limiting hole and limited in the space formed by the limiting hole.

The utility model provides a cab door lock, which comprises a limiting structure and a resetting structure; the limiting structure comprises a mounting part and a bending part; the mounting part is arranged on the base, and a limiting hole is formed in the mounting part; the bending part is formed at one end of the working part, which is away from the holding part, and is positioned in the limiting hole and limited in the space formed by the limiting hole; the reset structure comprises a connecting part and a reset spring; the connecting part is arranged on the mounting part and is positioned above or below the bending part, and two ends of the reset spring are respectively connected with the bending part and the mounting part.

According to the cab door lock provided by the utility model, the transmission piece is the pull rope, and two ends of the pull rope are respectively connected with the bending part and the unlocking part.

According to the cab door lock provided by the utility model, the end part of the pull rope is fixedly connected with the pin shaft; the bending part comprises a pair of mounting plates which are arranged at intervals, and the interval between the two mounting plates is smaller than the length of the pin shaft; the two mounting plates are provided with shaft holes, and the shaft holes on the two mounting plates are coaxial; one of the mounting plates is provided with a notch which is communicated with the shaft hole on the corresponding mounting plate and is used for the pin shaft to penetrate in the radial direction.

According to the cab door lock provided by the utility model, the transmission piece further comprises a wire tube sleeved outside the pull rope and used for limiting and guiding the pull rope, one end of the wire tube is fixedly connected to the mounting part, and the other end of the wire tube is fixedly connected to the base.

The utility model also provides engineering machinery comprising the cab door lock.

According to the cab door lock and the engineering machinery, the base, the unlocking handle and the transmission piece are arranged, when the door is required to be unlocked, the holding part is rotated, the working part rotates along with the door, the unlocking part is displaced through the transmission piece, so that the locking part of the lock tongue is separated from the lock catch, unlocking of the door is completed, and as the base is connected to the bottom of the cab, which is close to the door, the holding part is arranged close to the door of the cab, no matter the operator is positioned in the cab or outside the cab, the holding part is positioned in the reach of the operator, the operator on the ground can operate the holding part only by lifting the hand, the operator does not need to go deep into the cab to unlock, the number of times of boarding by the operator is reduced, and the unlocking convenience is improved.

Drawings

In order to more clearly illustrate the utility model or the technical solutions of the prior art, the following description will briefly explain the drawings used in the embodiments or the description of the prior art, and it is obvious that the drawings in the following description are some embodiments of the utility model, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic illustration of a cab door lock provided by the present utility model mated with a cab;

FIG. 2 is a schematic view of a cab door lock according to one embodiment of the present utility model;

FIG. 3 is a second schematic view of a cab door lock according to the present utility model;

fig. 4 is an enlarged view of a portion a in fig. 3.

Reference numerals:

1. a base; 2. unlocking the handle; 20. a grip portion; 21. a working section; 3. a transmission member; 30. a pull rope; 300. a pin shaft; 31. a conduit; 310. a threaded portion; 311. a first nut; 312. a second nut; 4. a latch; 5. a limit structure; 50. a mounting part; 500. a limiting hole; 51. a bending part; 511. a first mounting plate; 512. a second mounting plate; 513. a notch; 514. a boss; 6. a connecting plate; 60. a connection hole; 7. a reset structure; 70. a connection part; 71. a return spring; 8. and (5) locking.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the present utility model more apparent, the technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the described embodiments are some embodiments of the present utility model, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

In order to facilitate understanding of the cab door lock and the engineering machinery provided by the utility model, an application scene is firstly described, an outer door lock is generally arranged on a cab of the engineering machinery so as to fix an opened door, and most commonly, a structure of a lock catch and a latch is used, namely, the lock catch is fixedly connected to the door, the latch is fixed on the cab, and after the door is opened, the lock catch on the door is locked on the latch so as to fix the door. The door is locked and simultaneously the corresponding unlocking structure is also required to be equipped for unlocking the door. In the prior art, the unlocking structure is generally an unlocking handle arranged on the latch, the unlocking handle is positioned in the cab and connected with the lock tongue, and a worker can finish unlocking of the vehicle door by operating the unlocking handle. But the cab of engineering machine tool is relatively higher, and latch also can set up in the inboard that the door was kept away from in the cab in order to cooperate the hasp on the door generally, and this just leads to the staff to stand on subaerial difficult to operate the unblock handle in the cab, needs to log on repeatedly, makes the hand go deep into the cab and carries out the unblock operation, and the convenience is relatively poor. Therefore, the utility model provides the cab door lock and the engineering machinery, so as to improve the convenience of unlocking the door.

The cab door lock and the construction machine of the present utility model are described below with reference to fig. 1 to 4.

Referring to fig. 1 and 2, the cab door lock is disposed at the bottom of the cab near the door opening, and includes a base 1, an unlocking handle 2, a transmission member 3, and a latch 4.

Wherein, the latch 4 is the prior art, its structure roughly includes lock seat, spring bolt and is used for keeping the spring bolt in the self-locking spring of the locking position; the lock tongue is movably connected to the lock seat, such as hinged connection, sliding connection, etc., and one end of the lock tongue is formed with a locking part, and the other end is an unlocking part. After the car door is opened, the lock catch 8 bumps onto the lock tongue, the lock tongue elastically displaces, and the locking part is matched with the lock catch 8 and locks the lock catch 8 and the lock tongue under the action of the self-locking spring. When the vehicle door is unlocked, the unlocking part is pulled to enable the lock tongue to elastically displace, and the locking part is separated from the lock catch 8, so that the unlocking of the vehicle door is completed.

It should be noted that, since the structure of the latch 4 is not a main improvement point of the present utility model, only the locking and unlocking principle is illustrated in the present embodiment, so as to facilitate understanding of the cab door lock of the present utility model, and detailed description of the structure of the latch 4 is omitted.

The base 1 mainly plays a supporting role for connecting and fixing each component to the cab, and in particular, the base 1 is fixedly connected to the bottom of the cab near the doorway. The size, shape, specific structure, etc. of the base 1 can be adaptively changed according to practical requirements, for example, a plurality of reinforcing structures are provided for avoiding the shape change of the inner components of the cab and improving the connection strength. The latch 4 may be fixedly connected to the cab or to the base 1, and in this embodiment, the latch 4 is integrated on the base 1 so as to be connected to the transmission member 3.

The unlocking handle 2 is hinged on the base 1 through a hinge shaft, one end of the unlocking handle 2 is close to a cab door, a holding part 20 is formed, the other end of the unlocking handle is a working part 21, the hinge shaft is located between the holding part 20 and the working part 21, and the working part 21 rotates along with the rotation of the holding part 20. The transmission part 3 is used for connecting the working part 21 and the unlocking part in a transmission way, when the vehicle door needs to be unlocked, the holding part 20 is rotated, the working part 21 rotates along with the working part, and the unlocking part is displaced through the transmission part 3, so that the locking part of the lock tongue is separated from the lock catch 8, and the unlocking of the vehicle door is completed.

Because the base 1 is connected to the bottom of the cab near the gate position, and the holding part 20 is arranged near the gate position of the cab, no matter the staff is positioned in the cab or outside the cab, the holding part 20 is positioned in the range which is convenient for the staff to touch, the staff on the ground can operate the holding part 20 only by lifting the hand, and the hand does not need to go deep into the cab to unlock, so that the number of times of the staff boarding is reduced, and the unlocking convenience is improved.

Referring to fig. 3 and 4, the transmission member 3 includes a pulling rope 30 and a spool 31; wherein, both ends of stay cord 30 are connected with the operating portion 21 of unblock handle 2 and the unblock portion of latch 4 respectively, through rotating unblock handle 2, make stay cord 30 drive unblock portion displacement in order to unblock the door. Spool 31 fixed connection is on base 1, stay cord 30 wear to locate in the spool 31 and with spool 31 cooperation that slides, spool 31 can adopt the structure of rubber tube inside lining metal spring hose to make spool 31 have flexibility and hardness concurrently, with better restriction of better advance nature to stay cord 30 and guide, its effect is similar to the effect of brake spool to the brake cable on the bicycle, make stay cord 30 with specific direction and angle pulling unblock portion remove, the smooth going on of unblock work of being convenient for, simultaneously, flexible driving medium 3 can reduce the occupation to the interior space of driver's cabin. The transmission member 3 may also be of a link structure without taking space occupation into consideration.

The cab door lock further comprises a limiting structure 5 for limiting the rotation angle of the working portion 21, and avoiding damage to various components caused by excessive force during operation.

Specifically, the limiting structure 5 includes an installation portion 50 and a bending portion 51; wherein, the mounting part 50 is plate-shaped and arranged on the base 1, and the mounting part 50 is provided with a limit hole 500; the bending portion 51 is formed at one end of the working portion 21 away from the holding portion 20, and the bending portion 51 is penetrated into the limiting hole 500, so that the bending portion 51 is limited in a space formed by the limiting hole 500, and when the unlocking handle 2 is rotated, the bending portion 51 can only be turned up and down in the space formed by the limiting hole 500 under the limiting effect of the limiting hole 500, so that the rotation angle of the unlocking handle 2 is limited.

Referring to fig. 4, the mounting portion 50 is fixedly coupled to the base 1 by bolts to facilitate the mounting and dismounting of the mounting portion 50 on the base 1. The limiting hole 500 is opened at one side away from the holding part 20, so that the bending part 51 is conveniently embedded into the limiting hole 500 from the side of the mounting part 50, and the assembly of the unlocking handle 2 and the mounting part 50 is conveniently realized.

In other embodiments, the limiting structure 5 may further include only the mounting portion 50 without considering the mounting space, and the mounting portion 50 is provided with the limiting hole 500, so that the holding portion 20 or the working portion 21 of the unlocking handle 2 is inserted into the limiting hole 500 to perform the limiting function.

In other embodiments, the bending portion 51 may be further disposed on the holding portion 20, and correspondingly, the mounting portion 50 is disposed on a side of the base 1 near the holding portion 20.

In order to facilitate connection of the transmission member 3, referring to fig. 4, a pin 300 is fixedly connected to an end portion of the pull cord 30, and the bending portion 51 includes a pair of mounting plates disposed at intervals, and an included angle between the mounting plates and the working portion 21 is 90 degrees. The mounting plate near the inner side of the limit hole 500 is set as a first mounting plate 511, the other mounting plate is set as a second mounting plate 512, a first shaft hole is formed in the first mounting plate 511, a second shaft hole is formed in the second mounting plate 512, and the first shaft hole and the second shaft hole are coaxial.

The second mounting plate 512 is provided with a notch 513, and the notch 513 is communicated with the second shaft hole and is used for the pin 300 to be embedded into the second shaft hole from the notch 513 along the radial direction. During installation, the pin 300 is firstly embedded into the second shaft hole from the opening 513, and then the pin 300 is pushed towards the direction of the first shaft hole, so that the pin 300 is inserted into the first shaft hole, the pull rope 30 is positioned between the first mounting plate 511 and the second mounting plate 512, the pull rope 30 is convenient to install, and meanwhile, the first mounting plate 511 and the second mounting plate 512 can play a limiting role, and the large-amplitude shaking of the pull rope 30 is reduced.

In order to improve stability, the second mounting plate 512 has a certain elastic modulus, the width of the gap 513 is smaller than the diameter of the pin 300, when the pin 300 is mounted, the gap 513 of the second mounting plate 512 can be elastically deformed, and when the pin 300 is completely embedded into the second shaft hole, the gap 513 is closed, so that the pin 300 is prevented from falling out of the gap 513.

It will be appreciated that the notch 513 may be located on the upper or lower side of the second mounting plate 512 or at an end remote from the working portion 21, so long as the pin 300 is inserted into the second shaft hole from the notch 513. The notch 513 may also be formed in the first mounting plate 511, and when the pin 300 is installed, the pin 300 is now inserted into the first shaft hole from the notch 513, and then pushed toward the second shaft hole to insert the pin 300 into the second shaft hole.

Referring to fig. 4, a connecting plate 6 is disposed at the bottom of the mounting portion 50, and the connecting plate 6 and the mounting portion 50 are disposed at an angle, for example, an included angle of 90 degrees may be formed between the connecting plate 6 and the mounting portion 50, and other angles may be selected according to actual requirements; the connection plate 6 may be fixedly connected to the mounting portion 50, or may be integrally formed with the mounting portion 50. The connecting plate 6 is provided with a connecting hole 60, the connecting hole 60 corresponds to the interval between the first mounting plate 511 and the second mounting plate 512, and a notch communicated with the connecting hole 60 is arranged on one side of the connecting plate 6 away from the mounting part 50; the end of the conduit 31 is provided with a screw thread part 310, and the screw thread part 310 can be embedded into the connecting hole 60 from the notch of the connecting hole 60; the threaded portion 310 is connected with a first nut 311 and a second nut 312 in a threaded manner, and the connecting plate 6 can be clamped through the first nut 311 and the second nut 312, so that the spool 31 is fixedly connected to the connecting plate 6, and the overall stability of the transmission member 3 is improved. Wherein the first nut 311 is located above the connection plate 6, and the second nut 312 is located below the connection plate 6.

It will be appreciated that when one of the first nut 311 and the second nut 312 is screwed with the threaded portion 310 and the other is fixedly connected with the threaded portion 310, the connection plate 6 may be clamped as well to fix the spool 31 to the connection plate 6. When one of the first nut 311 and the second nut 312 is fixedly coupled to the threaded portion 310, the nut fixedly coupled to the threaded portion 310 may be replaced with a ring shape or other shapes.

The other end of the spool 31 may be fixedly connected to the base 1 at a position close to the latch 4 in the same manner so that the outlet of the spool 31 corresponds to the unlocking portion at an appropriate angle so that the pull cord 30 pulls the unlocking portion to unlock.

In order to improve the resetting ability of the unlocking handle 2, referring to fig. 4, the cab door lock further includes an elastic resetting structure 7 for driving the unlocking handle 2 to be reset, and the elastic direction of the resetting structure 7 is opposite to the rotation direction of the working portion 21.

Specifically, the return structure 7 includes a connecting portion 70 and a return spring 71; the connection portion 70 is connected to the base 1 and is located above or below the working portion 21, and both ends of the return spring 71 are fixedly connected to the working portion 21 and the connection portion 70, respectively. When the unlocking handle 2 is rotated, the working portion 21 rotates with it, the return spring 71 is elastically deformed, and after unlocking is completed, the unlocking handle 2 is released, and the unlocking handle 2 is returned under the action of the return spring 71.

Specifically, the connecting portion 70 is disposed on the mounting portion 50 in a protruding manner, and the connecting portion 70 is located at an upper side of the limiting hole 500, and correspondingly, a boss 514 is disposed on the bending portion 51, and two ends of the return spring 71 are respectively sleeved on the connecting portion 70 and the boss 514. When the unlocking handle 2 is unlocked, the grip portion 20 is pressed downward, the working portion 21 is lifted upward, the return spring 71 is compressed, and after unlocking is completed, the return spring 71 pushes the working portion 21 to return. The connection portion 70 and the mounting portion 50 may be welded, screwed or integrally cast, and in this embodiment, the connection portion 70 is integrally formed on the mounting portion 50. Accordingly, the boss 514 and the bent portion 51 may be welded, screwed or integrally cast.

It will be appreciated that the connection 70 serves only to provide a mounting location for the return spring 71, and that the connection 70 and the mounting 50 are not interdependent and may be provided separately. The connection portion 70 may also be located below the connection portion 70, in which case the return spring 71 is changed from a compression spring to a tension spring. In addition, the reset mechanism may be disposed at the holding portion 20 or other positions of the unlocking handle 2, and the reset spring 71 may deform along with the rotation of the unlocking handle 2, and may perform a reset function.

In other embodiments, the return spring 71 may be replaced by other elastic members, such as a spring piece, an elastic rope, etc., which also can play a role in elastic return.

The engineering machine provided by the utility model is described below, and the engineering machine described below and the cab door lock described above can be correspondingly referred to each other.

A construction machine comprises a cab and the cab door lock.

The innovation point of the utility model is that: when the door needs to be unlocked, the holding part 20 is rotated, the working part 21 rotates along with the holding part, and the unlocking part is displaced through the transmission part 3, so that the locking part of the lock tongue is separated from the lock catch 8, and the unlocking of the door is completed. Because the base 1 is connected to the bottom of the cab near the gate position, and the holding part 20 is arranged near the gate position of the cab, no matter the staff is positioned in the cab or outside the cab, the holding part 20 is positioned in the contact range of the staff, the staff on the ground can operate the holding part 20 only by lifting the hand, and the hand does not need to go deep into the cab to unlock, so that the number of times of boarding by the staff is reduced, and the unlocking convenience is improved.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present utility model, and are not limiting; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present utility model.

Claims (10)

1. A cab door lock, comprising:

the unlocking handle (2) is arranged at the bottom of the cab door;

a base (1) for connecting to a cab; the unlocking handle (2) is hinged on the base (1) through a hinge shaft; one end of the unlocking handle (2) is close to a cab door to form a holding part (20), the other end of the unlocking handle is a working part (21), and the hinge shaft is positioned between the holding part (20) and the working part (21);

and the transmission piece (3) is used for transmitting and connecting the working part (21) and the unlocking part of the latch (4) so that the unlocking part can follow up with the rotation of the working part (21) and unlock the latch (4).

2. The cab door lock according to claim 1, further comprising an elastic return structure (7) for driving the unlocking handle (2) to return, the elastic direction of the return structure (7) being opposite to the rotational direction of the working portion (21).

3. The cab door lock according to claim 2, characterized in that the return structure (7) comprises a connecting portion (70) and a return spring (71); the connecting part (70) is arranged on the base (1), the connecting part (70) is positioned above or below the working part (21), and two ends of the return spring (71) are respectively connected with the working part (21) and the connecting part (70).

4. The cab door lock according to claim 1, further comprising a limiting structure (5) for limiting the rotation angle of the working portion (21).

5. The cab door lock according to claim 4, characterized in that the limit structure (5) comprises:

the mounting part (50) is arranged on the base (1), and a limiting hole (500) is formed in the mounting part (50);

and the bending part (51) is formed at one end of the working part (21) which is away from the holding part (20), and the bending part (51) is positioned in the limiting hole (500) and is limited in a space formed by the limiting hole (500).

6. The cab door lock according to claim 1, comprising a limit structure (5) and a reset structure (7); the limiting structure (5) comprises an installation part (50) and a bending part (51); the mounting part (50) is arranged on the base (1), and a limiting hole (500) is formed in the mounting part (50); the bending part (51) is formed at one end of the working part (21) which is away from the holding part (20), and the bending part (51) is positioned in the limiting hole (500) and is limited in a space formed by the limiting hole (500); the reset structure (7) comprises a connecting part (70) and a reset spring (71); the connecting part (70) is arranged on the mounting part (50) and is positioned above or below the bending part (51), and two ends of the return spring (71) are respectively connected with the bending part (51) and the mounting part (50).

7. The cab door lock according to claim 5 or 6, wherein the transmission member (3) is a pull rope (30), and both ends of the pull rope (30) are respectively connected with the bending portion (51) and the unlocking portion.

8. The cab door lock according to claim 7, wherein the end of the pull rope (30) is fixedly connected with a pin shaft (300); the bending part (51) comprises a pair of mounting plates which are arranged at intervals, and the interval between the two mounting plates is smaller than the length of the pin shaft (300); the two mounting plates are provided with shaft holes, and the shaft holes on the two mounting plates are coaxial; one of the mounting plates is provided with a notch (513), and the notch (513) is communicated with the shaft hole on the corresponding mounting plate and is used for the pin shaft (300) to penetrate in the radial direction.

9. The cab door lock according to claim 8, wherein the transmission member (3) further comprises a spool (31) sleeved outside the pull rope (30) for limiting and guiding the pull rope (30), one end of the spool (31) is fixedly connected to the mounting portion (50), and the other end of the spool is fixedly connected to the base (1).

10. A construction machine comprising a cab door lock according to any one of claims 1 to 9.

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