Earthwork vehicle cab door lock

Abstract

The utility model discloses an earthwork vehicle cab door lock. The automobile door lock comprises an outer door lock assembly, an inner door lock assembly and a door lock pull rod, the inner door lock assembly comprises a handle, a transverse sleeve, an inner door pull rod, an inner door lock shell, an upper clamping plate, a lower clamping plate and a plug, the inner door pull rod is connected with a third linkage piece, the third linkage piece is transmitted to a first linkage piece, and a stop pin and a clamping head are arranged at the end of the first linkage piece. The outer door lock assembly comprises an outer door lock mounting plate, an outer door lock shell, an outer door lock fixing frame, an outer door lock linkage plate, an outer handle and a lock cylinder assembly, and the outer door lock assembly comprises an outer door lock mounting plate, an outer door lock shell, an outer door lock fixing frame, an outer door lock linkage plate, an outer handle and a lock cylinder assembly. The outer handle controls rotation of the outer door lock linkage plate through handle connection and the clamping plate, and the lock cylinder assembly is connected to the V-shaped cam plate and limits the outer door lock linkage plate and the clamping plate through the V-shaped cam plate. The cab door is convenient to open from the outer side.

Description

TECHNICAL FIELD

[0001] The utility model relates to engineering vehicle cab door lock technical field, concretely relates to a kind of earth-moving vehicle cab door lock. BACKGROUND

[0002] The cab of existing earth-moving vehicle is about 0.9 to 1.2m from ground, if the outer door lock and the inner door lock on both sides of the cab door are placed at the same height from ground, the driver needs to insert the key into the lock and pull the outer handle to open the door from the outside of the cab, which is inconvenient to align the key, and even the driver with lower height needs to put his foot on the ground to align the key, which is very inconvenient to operate. SUMMARY

[0003] The utility model aims at the deficiency of prior art, and provides an earth-moving vehicle cab door lock which is convenient for the driver to open the door from the outside of the door.

[0004] To achieve the above object, the utility model adopts the technical scheme of an earth-moving vehicle cab door lock, which comprises an outer door lock assembly and an inner door lock assembly, the outer door lock assembly is arranged on the outside of the cab door, the inner door lock assembly is arranged on the inside of the cab door, and the outer door lock assembly and the inner door lock assembly are connected through a door lock pull rod to control the opening and closing of the cab door.

[0005] The inner door lock assembly comprises a handle, a cross sleeve, an inner door pull rod, an inner door lock shell, an upper clamping plate, a lower clamping plate, and a plug. The plug is fixed to the door frame through a plug mounting seat. One end of the cross sleeve is connected to the inner door lock shell. The cross sleeve is vertically downward provided with a handle mounting seat. The handle is assembled in the handle mounting seat. The side of the handle away from the inner door lock shell is hingedly connected to the handle mounting seat. The inner wall space of the handle is communicated with the inner wall space of the cross sleeve. The handle is fixedly connected with a hook in the inner wall space. The hook is obliquely downward abutted against a return spring. The other end of the return spring is fixedly connected to the inner wall of the handle. The hook is connected with one end of the inner door pull rod. The inner door pull rod passes through the inside of the cross sleeve and is connected to a third linkage of L type. The end of the third linkage is provided with a second clamping portion. The third linkage is mounted on a pivot mounting plate through a first pivot. The pivot mounting plate is fixedly connected to the inner door lock shell. The pivot mounting plate is sequentially assembled from top to bottom with a second pivot, a third pivot, a fourth pivot, and a fifth pivot. The second pivot is connected with a first linkage of L type. The end of the first linkage is provided with a first clamping portion. The other end of the second linkage is provided with a first clamping head and a second clamping head. The other end of the second linkage is also vertically fixedly connected with a blocking pin. The first clamping portion and the second clamping portion are vertically correspondingly clamped. The upper clamping plate is fixed to the pivot mounting plate through the third pivot. The lower clamping plate is fixed to the pivot mounting plate through the fourth pivot. The upper clamping plate is provided with a first clamping groove and a second clamping groove. The lower clamping plate is provided with a third clamping groove and a fourth clamping groove. The upper clamping plate and the lower clamping plate symmetrically clamped to the plug. The fifth pivot is connected with a second linkage. The end of the second linkage is provided with a groove corresponding to the blocking pin. The other end of the second linkage is connected to a door lock pull rod. A Y-shaped fixing member is arranged. Two bent ends of the Y-shaped fixing member are fixedly connected with the third pivot and the fourth pivot respectively. The triangular end of the Y-shaped fixing member is fixedly connected with the cross sleeve.

[0006] The outer door lock assembly comprises an outer door lock mounting plate, an outer door lock shell, an outer door lock fixing frame, an outer door lock linkage plate, an outer pull handle, and a lock core assembly. The lock core assembly comprises an outer lock core and a V-shaped cam plate. The outer lock core is fixed to the outer door lock shell. The lock tail of the outer lock core is connected with the V-shaped cam plate. The outer pull handle is mounted on the outer side of the concave outer door lock shell. The upper and lower ends of the outer pull handle are both connected with a handle connecting plate. The handle connecting plate is Z-shaped. One end of the handle connecting plate is fixedly connected with the outer pull handle. The other end of the handle connecting plate is provided with a clamping pivot. The clamping pivot is connected with a clamping plate. The outer door lock shell is provided with a protrusion at the middle turning point of the handle connecting plate and is hingedly connected with the middle turning point of the handle connecting plate. The middle of the outer door lock linkage plate is fixed to the outer door lock shell through bolts and soft gaskets. The outer door lock linkage plate further comprises a connecting rod arm extending to the left side, a return arm extending to the right side, and a locking arm extending to the upper side. The connecting rod arm is connected with the door lock pull rod. The locking arm is L-shaped and the two sides of the locking arm are clamped with the clamping plate. The left and right end faces of the outer door lock fixing frame are connected with the outer door lock shell. The middle of the outer door lock fixing frame is fixed to the outer door lock shell through bolts.

[0007] Preferably, the upper end of the right side bending surface of the outer door lock fixing frame is provided with a limiting groove corresponding to the position of the locking arm.

[0008] Preferably, the outer door lock fixing frame is a bending plate member and has a hollow stepped arch shape.

[0009] Preferably, the left and right bending surfaces of the outer door lock fixing frame are hollowed.

[0010] Compared with the prior art, the door lock pull rod in the utility model conducts the opening operation of the outer door lock to the inner door lock, so that the opening height of the outer door lock can be adjusted through the length of the door lock pull rod, and the opening and closing of the outer side of the cab door can only be locked through a key, thereby avoiding the situation that the driver directly locks the door after getting off the vehicle and forgetting to take the key out. BRIEF DESCRIPTION OF DRAWINGS

[0011] Figure 1 is a front view of the utility model.

[0012] Figure 2 is a front view of the utility model after hiding some parts.

[0013] Figure 3 is a first perspective view of the inner door lock assembly in the utility model.

[0014] Figure 4 is a second perspective view of the inner door lock assembly in the utility model.

[0015] Figure 5 is a third perspective view of the inner door lock assembly in the utility model.

[0016] Figure 6 is a fourth perspective view of the inner door lock assembly in the utility model.

[0017] Figure 7 is a front view of the outer door lock assembly in the utility model after hiding the outer door lock mounting plate.

[0018] Figure 8 is a first perspective view of the outer door lock assembly in the utility model.

[0019] Figure 9 is a second perspective view of the outer door lock assembly in the utility model.

[0020] Figure 10 is a third perspective view of the outer door lock assembly in the utility model.

[0021] 1- inner door lock assembly, 11- inner door lock shell, 12- horizontal sleeve, 13- handle, 131- handle mounting seat, 132- return spring, 133- hook, 14- inner door pull rod, 151- first linkage, 152- second linkage, 153- third linkage, 161- first rotating shaft, 162- second rotating shaft, 163- third rotating shaft, 164- fourth rotating shaft, 165- fifth rotating shaft, 171- first clamping part, 172- second clamping part, 18- Y-shaped fixing piece, 191- groove, 192- blocking pin, 20- plug, 21- plug mounting seat, 22- door frame, 23- rotating shaft mounting plate, 241- upper clamping plate, 242- lower clamping plate, 251- first clamping head, 252- second clamping head, 261- first clamping groove, 262- second clamping groove, 263- third clamping groove, 264- fourth clamping groove, 3- outer door lock assembly, 31- door lock pull rod, 32- outer door lock mounting plate, 33- outer handle, 331- handle connecting plate, 332- clamping position rotating shaft, 333- clamping position plate, 34- lock core assembly, 341- outer lock core, 342- V-shaped cam plate, 35- outer door lock shell, 36- outer door lock linkage plate, 361- locking arm, 362- return arm, 363- connecting rod arm, 37- outer door lock fixing frame, 371- limiting groove, 38- outer door lock shell, 39- bolt. DETAILED DESCRIPTION

[0022] The utility model will be further clarified below in combination with the drawings and specific embodiments, and it should be understood that these embodiments are only used for illustrating the utility model and are not used for limiting the scope of the utility model, and after reading the utility model, the modification of various equivalent forms of the utility model by the person skilled in the art falls within the range defined by the claims attached to the present application.

[0023] As Figures 1 to 2 The earthwork vehicle cab door lock shown in the drawing comprises an outer door lock assembly 3 and an inner door lock assembly 1, the outer door lock assembly 3 is arranged on the outer side of the cab door, the inner door lock assembly 1 is arranged on the inner side of the cab door, the outer door lock assembly 3 and the inner door lock assembly 1 are connected through a door lock pull rod 31 and are linked to control the opening and closing of the cab door; since the chassis of the earthwork vehicle cab is high and the size of the wheel is large, the outer side of the cab door is 0.9m-1.2m high from the ground, when the door is opened from the outer side, the outer door lock needs to be arranged on the lower side of the outer side of the door, thereby facilitating the opening of the door by the driver, and when the door is opened from the inner side, the position of the inner door lock is the same as the position of the common inner lock, so the inner door lock and the outer door lock need to be linked to open and close the door, thereby facilitating the opening and closing of the door by the driver.

[0024] As Figures 2 to 6As shown, the inner door lock assembly 1 comprises a handle 13, a cross sleeve 12, an inner door pull rod 14, an inner door lock housing 11, an upper clamping plate 241, a lower clamping plate 242, a plug 20, the inner door lock housing 11 is fixedly connected to the cab door, the plug 20 is fixedly connected to the door frame 22 through a plug mounting seat 21, one end of the cross sleeve 12 is fixedly connected to the inner door lock housing 11, the other end of the cross sleeve 12 is fixedly connected to the cab door, the cross sleeve 12 is vertically downwardly grooved and is provided with a handle mounting seat 131, the handle 13 is arranged to be assembled in the handle mounting seat 131 and the side of the handle 13 away from the inner door lock housing 11 is hingedly connected to the handle mounting seat 131, the handle 13 is fixedly connected with a hook 133 extending into the interior of the cross sleeve 12, the hook 133 is obliquely downwardly provided with a return spring 132, both ends of the return spring 132 are fixedly connected to the handle 13 and the hook 133 respectively, the hook 133 is connected to one end of the inner door pull rod 14, when the handle 13 is rotated relative to the hinged connection after being pressed, the hook 133 pulls the inner door pull rod 14 while the return spring 132 is extruded and shrinks to store energy, when the handle 13 is not pressed, the inner door pull rod 14 is adjusted back by the energy release of the return spring 132, the return spring 132 rebounds and acts on the hook 133 to make the handle 13 return to the original state, the inner door pull rod 14 passes through the interior of the cross sleeve 12 and is connected to a third linkage 153 of L type, the end of the third linkage 153 is provided with a second clamping portion 172, the third linkage 153 is installed to a rotating shaft mounting plate 23 through a first rotating shaft 161, the rotating shaft mounting plate 23 is fixedly connected to the inner door lock housing 11, the rotating shaft mounting plate 23 is sequentially provided with a second rotating shaft 162, a third rotating shaft 163, a fourth rotating shaft 164 and a fifth rotating shaft 165 from top to bottom, the second rotating shaft 162 is connected with a first linkage 151 of L type, the end of the first linkage 151 is provided with a first clamping portion 171, the other end of a second linkage 152 is provided with a first clamping head 251 and a second clamping head 252, the other end of the second linkage 152 is also vertically fixedly connected with a blocking pin 192, the first clamping portion 171 is vertically correspondingly clamped with the second clamping portion 172, the upper clamping plate 241 is fixed to the rotating shaft mounting plate 23 through the third rotating shaft 163, the lower clamping plate 242 is fixed to the rotating shaft mounting plate 23 through the fourth rotating shaft 164, the upper clamping plate 241 is provided with a first clamping groove 261 and a second clamping groove 262, the lower clamping plate 242 is provided with a third clamping groove 263 and a fourth clamping groove 264, the upper clamping plate 241 and the lower clamping plate 242 which are symmetrically arranged above and below clamp the plug 20, the fifth rotating shaft 165 is connected with the second linkage 152, the end of the second linkage 152 is provided with a groove 191 corresponding to the blocking pin, the other end of the second linkage 152 is connected to a door lock pull rod 31, a Y-shaped fixing piece 18 is arranged and two bent ends of the Y-shaped fixing piece 18 are fixedly connected with the third rotating shaft 163 and the fourth rotating shaft 164 respectively, the triangular end of the Y-shaped fixing piece 18 is fixedly connected with the cross sleeve 12;

[0025] The process of opening the door from the inside of the cab: when the cab door is in a closed state, the first clamping head 251 is clamped in the first clamping groove 261, and the second clamping head 252 is clamped in the third clamping groove 263. When the inner door pull rod 14 is pulled, the third linkage 153 rotates with the first rotating shaft 161, the second clamping part 172 rotates the first clamping part 171, and then the first linkage 151 rotates with the second rotating shaft 162, pushes the cab door outward, and the upper clamping plate 241 and the lower clamping plate 242 rotate by a certain angle with the displacement of the plug 20. After that, the first clamping head 251 is clamped in the second clamping groove 262, and the second clamping head 252 is clamped in the fourth clamping groove 264. The circular clamping groove formed by the upper clamping plate 241 and the lower clamping plate 242 after rotation allows the plug 20 to pass transversely, thereby opening the cab door.

[0026] As shown in Figures 7 to 10 The outer door lock assembly 3 includes an outer door lock mounting plate 32, an outer door lock housing 35, an outer door lock fixing frame 37, an outer door lock linkage plate 36, an outer handle 33, a lock cylinder assembly 34,

[0027] The lock cylinder assembly 34 includes an outer lock cylinder 341 and a V-shaped cam plate 342, and the outer lock cylinder 341 is fixed on the outer door lock housing 35. The outer lock cylinder 341 is connected with the V-shaped cam plate 342 at the lock tail;

[0028] The outer handle 33 is installed on the outside of the concave outer door lock housing 35. The upper and lower ends of the outer handle 33 are connected with handle connecting plates 331, which are Z-shaped. One end of the handle connecting plate 331 is fixedly connected with the outer handle 33, and the other end of the handle connecting plate 331 is provided with a clamping shaft 332. The clamping shaft 332 is connected with a clamping plate 333. The outer door lock housing 35 is provided with a protrusion at the middle turning point of the handle connecting plate 331 and is hingedly connected with the middle turning point of the handle connecting plate 331, so that the two ends of the handle connecting plate 331 can rotate with the middle turning point of the handle connecting plate 331, thereby driving the clamping plate 333 to rotate;

[0029] The middle of the outer door lock linkage plate 36 is fixed on the outer door lock shell 35 through the bolt 39 and the soft gasket, so that the outer door lock linkage plate 36 can rotate with the bolt 39. The outer door lock linkage plate 36 further includes a connecting rod arm 363 extending to the left, a reset arm 362 extending to the right, and a locking arm 361 extending upward. The connecting rod arm 363 is connected with the door lock pull rod 31. The locking arm 361 is L-shaped and bent, and the two sides of the locking arm 361 are clamped with the clamping plate 333. The outer door lock shell 35 is provided with a protrusion outside the clamping plate 333 to limit the rotation direction of the clamping plate 333, so that the clamping plate 333 can only push the locking arm 361 when rotating, thereby driving the outer door lock linkage plate 36 to rotate. In the locked state, the other side of the bent part of the locking arm 361 is clamped with one end of the V-shaped cam plate 342, thereby completing the locking of the outer handle 33. In the unlocked state, the V-shaped cam plate 342 is unlocked with the outer lock core 341, so that the rotation of the outer handle 33 can be transmitted and converted into the rotation of the outer door lock linkage plate 36.

[0030] The outer door lock fixing frame 37 is a bent plate and has a hollow stepped arch shape. The left and right end faces of the outer door lock fixing frame 37 are connected with the outer door lock shell 35. The middle of the outer door lock fixing frame 37 is fixed with the outer door lock shell 35 through the bolt 39. The left and right bent faces of the outer door lock fixing frame 37 are hollow. The upper end of the right bent face of the outer door lock fixing frame 37 is provided with a limiting groove 371 corresponding to the position of the locking arm 361. The hollow parts of the two bent faces of the outer door lock fixing frame 37 correspond to the insertion of the connecting rod arm 363 and the reset arm 362 and limit the rotation stroke of the connecting rod arm 363 and the reset arm 362.

[0031] Further, the outer door lock fixing frame 37 is provided with a limiting groove 371 corresponding to the position of the locking arm 361. When the clamping plate 333 rotates with the outer handle 33, the clamping plate 333 pushes the locking arm 361 to rotate vertically. Due to the limitation of the outer door lock shell 35 on the clamping plate 333 and the rotation of the clamping shaft 332 with the outer handle 33, the clamping plate 333 also has a horizontal rotation, as indicated by the arrow in the figure. The clamping plate 333 pushes the locking arm 361 to displace in the limiting groove 371 and limits the stroke of the clamping plate 333 through the limiting groove 371. Since the movement of the locking arm 361 in the limiting groove 371 is based on the elastic deformation of the locking arm 361, after the outer handle 33 is released and the force is removed, the elastic potential energy accumulated in the locking arm 361 pushes the clamping plate 333 back to the original position, so that the outer handle 33 returns to the original position.

[0032] The process of opening the door from the outside of the cab: after rotating the key inserted into the outer lock core 341, the locking end of the V-shaped cam plate 342 rotates upward with the outer lock core 341, thereby releasing the limiting of the locking arm 361 and the retaining pin, and the outer handle 33 is pushed outward to open the cab door, at this time, the handle connecting plate 331 rotates with the hinge to make the retaining plate 333 connected with the retaining shaft 332 push the locking arm 361, the locking arm 361 rotates to drive the outer door lock linkage plate 36 to rotate, the outer door lock linkage plate 36 rotates to drive the connecting rod arm 363 to rotate downward, thereby making the door lock pull rod 31 pull downward and drive the second linkage 152 to rotate with the fifth rotating shaft 165, so that the recess 191 on the second linkage 152 drives the retaining pin to move away from the plug 20, and then the first linkage 151 is pushed to make the first clamping head 251 move from the first clamping groove 261 to the second clamping groove 262, and the second clamping head 252 moves from the third clamping groove 263 to the fourth clamping groove 264, the circular clamping groove formed by the upper clamping plate 241 and the lower clamping plate 242 after rotating makes the plug 20 can pass through horizontally.

[0033] The above description shows and describes the preferred embodiments of the present application, as described above, it should be understood that the present application is not limited to the form disclosed herein, should not be considered as excluding other embodiments, but can be used in various other combinations, modifications and environments, and can be changed within the scope of the application described herein, through the above teaching or related technical or knowledge. The changes and variations made by those skilled in the art without departing from the spirit and scope of the present application shall be within the scope of the appended claims of the present application.

Claims

1. A cab door lock for earthmoving vehicles, characterised in that: The outer door lock assembly is arranged on the outside of the cab door, and the inner door lock assembly is arranged on the inside of the cab door. The inner door lock assembly comprises a handle, a cross sleeve, an inner door pull rod, an inner door lock shell, an upper clamping plate, a lower clamping plate, and a plug. The plug is fixed to the door frame through a plug mounting seat. One end of the cross sleeve is connected to the inner door lock shell. The cross sleeve is vertically downward provided with a handle mounting seat. The handle is assembled in the handle mounting seat. The side of the handle away from the inner door lock shell is hingedly connected to the handle mounting seat. The inner wall space of the handle is communicated with the inner wall space of the cross sleeve. The handle is fixed with a hook in the inner wall space. The hook is obliquely downward abutted against a return spring. The other end of the return spring is fixed to the inner wall of the handle. The hook is connected to one end of the inner door pull rod. The inner door pull rod passes through the inside of the cross sleeve and is connected to a third linkage of an L type. The end of the third linkage is provided with a second clamping portion. The third linkage is installed on a pivot mounting plate through a first pivot. The pivot mounting plate is fixed to the inner door lock shell. The pivot mounting plate is sequentially assembled from top to bottom with a second pivot, a third pivot, a fourth pivot, and a fifth pivot. The second pivot is connected with a first linkage of an L type. The end of the first linkage is provided with a first clamping portion. The other end of the second linkage is provided with a first clamping head and a second clamping head. The other end of the second linkage is also vertically fixed with a blocking pin. The first clamping portion and the second clamping portion are vertically correspondingly clamped. The upper clamping plate is fixed to the pivot mounting plate through the third pivot. The lower clamping plate is fixed to the pivot mounting plate through the fourth pivot. The upper clamping plate is provided with a first clamping groove and a second clamping groove. The lower clamping plate is provided with a third clamping groove and a fourth clamping groove. The upper clamping plate and the lower clamping plate symmetrically clamped to the plug. The fifth pivot is connected with a second linkage. The end of the second linkage is provided with a groove corresponding to the blocking pin. The other end of the second linkage is connected to the door lock pull rod. A Y-shaped fixing piece is arranged. Two bent ends of the Y-shaped fixing piece are respectively fixed to the third pivot and the fourth pivot. The triangular end of the Y-shaped fixing piece is fixed to the cross sleeve. The outer door lock assembly comprises an outer door lock mounting plate, an outer door lock housing, an outer door lock fixing frame, an outer door lock linkage plate, an outer pull handle, a lock core assembly, the lock core assembly comprises an outer lock core and a V-shaped cam plate, the outer lock core is fixed on the outer door lock housing, and the outer lock core is connected with the V-shaped cam plate at a lock tail; the outer pull handle is installed on the outer side of the concave outer door lock housing, the upper and lower ends of the outer pull handle are both connected with handle connecting plates, the handle connecting plates are Z-shaped, one end of the handle connecting plate is fixed with the outer pull handle, the other end of the handle connecting plate is provided with a clamping shaft, the clamping shaft is connected with a clamping plate, and the outer door lock housing is provided with a protrusion at the middle turning part of the handle connecting plate and is hinged with the middle turning part of the handle connecting plate; the middle of the outer door lock linkage plate is fixed on the outer door lock housing through bolts and soft gaskets, the outer door lock linkage plate further comprises a left extending connecting rod arm, a right extending reset arm and an upward extending locking arm, the connecting rod arm is connected with a door lock pull rod, the locking arm is L-shaped and bent, and the two sides of the locking arm are clamped with the clamping plate; the left and right end faces of the outer door lock fixing frame are connected with the outer door lock housing, and the middle of the outer door lock fixing frame is fixed with the outer door lock housing through bolts.

2. The earthmoving vehicle cab door lock of claim 1, wherein: The upper end of the right side bending surface of the outer door lock fixing frame is provided with a limiting groove corresponding to the position of the locking arm.

3. The earth-working vehicle cab door lock of claim 1, wherein: The outer door lock fixing frame is a bending plate and is in the form of a hollow ladder-shaped arch.

4. The earthmoving vehicle cab door lock of claim 3, wherein: The left and right bending surfaces of the outer door lock fixing frame are both hollowed out.

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