Side door lock device for engineering machinery

Abstract

The invention relates to the technical field of engineering machinery lock devices, and discloses a side door lock device for engineering machinery, which comprises a driven door, a driving door, a spring sliding lock mechanism, a stretching and clamping mechanism and a push-pull pressing mechanism, by arranging the stretching and clamping mechanism, the problem that a traditional engineering machinery door lock is easy to loosen and lose efficacy under vibration impact can be solved, and the safety of engineering machinery is improved. According to the mechanism, linear thrust transmitted by a push-pull pressing mechanism is converted into bidirectional locking force, transverse displacement of a straight plate drives a circular sliding groove to vertically press downwards through an inclined face of a special-shaped plate, a long circular rod is forced to drive a sleeve plate to synchronously move downwards, and a left sliding plate and a right sliding plate are reset to the vertical position from the inclined state under the forced guide of a limiting block; the tail end of the right sliding plate is accurately clamped into a tooth gap of the gear plate, the defect of stress relaxation caused by continuous vibration of a traditional pure spring lock tongue is avoided, even if a hard spring loses pre-tightening force due to fatigue, the tooth-shaped clamping lock can still physically block the back-off path of the gear plate, and compared with a traditional door lock, the anti-vibration stability is greatly improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of engineering machinery lock device, more particularly to a side door lock device for engineering machinery. BACKGROUND

[0002] The engineering door lock is a door lock system specially designed for engineering scenes, covering the fields of construction, industry, commerce, public facilities, etc., and its core function is to meet the needs of high safety, durability, management efficiency and scene adaptation: The traditional engineering door lock faces the problem of structural failure under vibration impact. Due to the dependence on the elastic reset of a single spring latch, continuous vibration can easily cause the spring stress to relax, gradually increasing the meshing gap between the bolt and the lock catch. When the door body is subjected to lateral impact, the gear plate is easy to disengage from the meshing range of the gear lock under the action of inertia, causing instantaneous unlocking. The existing door lock is slow to respond to the deformation of the door body, which can easily lead to sealing failure. The traditional structure needs a door gap deformation of more than 3mm to trigger the locking compensation. However, the door frame of the engineering machinery often produces elastic deformation of small displacement under load. At this time, the lock is still in the inactive state. In addition, the traditional slide rod is easy to be stuck in special environments. The mechanism cannot maintain the movement accuracy after multiple cycles, and is easy to produce false operation or failure caused by the invasion of particulate matter. SUMMARY

[0003] In order to overcome the above-mentioned defects of the prior art, the present application provides a side door lock device for engineering machinery to solve the problems existing in the background art.

[0004] The present application provides the following technical scheme: a side door lock device for engineering machinery, comprising a driven door and a driving door, the front end surface of the driving door is fixedly connected with a plug-in door lock, the rear end of the driving door and the side corresponding to the plug-in door lock are rotatably connected with a spring slide lock mechanism, one side of the spring slide lock mechanism is fixedly connected with a stretching clamping mechanism, the side away from the driven door of the spring slide lock mechanism is provided with the driven door, and the bottom of the stretching clamping mechanism is slidably connected with a push-pull compression mechanism on the side close to the spring slide lock mechanism. Further, the stretching clamping mechanism comprises a two-layer extrusion mechanism fixedly connected on the side of the spring slide lock mechanism away from the driven door, the bottom of the two-layer extrusion mechanism is fixedly connected with a first layer of stretching mechanism, and the inside of the two-layer extrusion mechanism and the first layer of stretching mechanism is provided with an extrusion rod mechanism.

[0005] Further, the spring slide lock mechanism is the main lock eye structure of the structure. The driving door and the driven door are locked with each other in the opening and closing process. When one of the driving door and the driven door is subjected to vertical pressure, the push-pull compression mechanism is triggered to transmit the pressure to the stretching clamping mechanism, and then the extrusion rod mechanism triggers the locking device to limit the spring slide lock mechanism.

[0006] Furthermore, the spring sliding lock mechanism includes a large fixed plate fixedly connected to the surface of the active door, a hard spring fixedly connected to the side of the large fixed plate close to the driven door, a gear plate fixedly connected to the other side of the hard spring, a fixing frame is provided on the outer side of the gear plate and the outer surface of the active door, a latch is fixedly connected to the other side of the gear plate, a lock catch is provided on the outer surface of the driven door and the outer side of the corresponding latch, a gear lock is fixedly connected to the outer surface of the active door and the top position of the corresponding gear plate, and a lock core is fixedly connected to the inner center of the gear lock.

[0007] Furthermore, after the active door is rotated, the latch contacts the lock catch, and then the hard spring is compressed based on the design of the bevel and under the restriction of the fixed frame, the latch is engaged into the lock catch to complete the locking purpose. When unlocking, the key is inserted into the lock cylinder. After rotation, the gear lock rotates synchronously with the lock cylinder. When the gears engage with each other and rotate, the gear plate is moved, and the gear plate is compressed again to push the active door to open the door lock.

[0008] Furthermore, the push-pull clamping mechanism includes a base frame fixedly connected to the outer surface of the active door and the bottom of the spring sliding lock mechanism, the base frame is fixedly connected to a fixed base on the side away from the driven door, the fixed base is fixedly connected to a limiting plate on the side close to the driven door, the center of the base frame is fixedly connected to a rotating rod, the outer side of the rotating rod is rotatably connected to a push plate, the end of the push plate away from the driven door is rotatably connected to an extrusion block, the center of the fixed base is slidably connected to a sliding rod, the end of the sliding rod close to the driven door is fixedly connected to an inclined sliding block, and the other end of the sliding rod is fixedly connected to a connecting plate.

[0009] Furthermore, the driven door is subjected to external pressure, pushing the push plate to rotate around the rotating rod, and the other end of the push plate squeezes the inclined slider. The inclined slider is subjected to the thrust and moves toward the side close to the active door under the restriction of the sliding rod, transmitting external pressure to the stretching and clamping mechanism.

[0010] Furthermore, the two-layer extrusion mechanism includes a second-layer base fixedly connected to the side of the large fixed plate away from the driven door and the outer surface of the active door, and the inner surface of the second-layer base is fixedly connected to a small fixed plate on the side close to the bottom, and the outer surface of the small fixed plate is fixedly connected to a limiting block.

[0011] Furthermore, the first-layer stretching mechanism includes a first-layer base fixedly connected to the bottom of the second-layer base, the interior of the first-layer base is slidably connected to a circular slide groove, the interior of the first-layer base and the interior of the circular slide groove are slidably connected to a straight plate, and the side of the straight plate close to the driven door is fixedly connected to a connecting plate.

[0012] Further, the extrusion rod mechanism comprises a long circular rod fixedly connected at the top of the circular sliding groove, the outer surface of the long circular rod is fixedly connected with a sleeve plate, the outer surface of the bottom end of the sleeve plate is fixedly connected with a connecting plate, the connecting plate away from the driven door side is provided with a left sliding plate outside the outer side of the corresponding limiting block at the top thereof, the connecting plate on the other side is provided with a right sliding plate outside the outer side of the corresponding limiting block at the top thereof, and the outer surface of the long circular rod and the top of the sleeve plate are provided with nuts.

[0013] Further, in the initial position, the oblique opening of the special-shaped plate is located at the leftmost end of the inner sliding groove of the circular sliding groove, the circular sliding groove is located at the inner side of the first layer base near the upper side, the inclined surface of the special-shaped plate is fitted with the inclined surface in the inner side of the circular sliding groove, when the straight plate feels the pushing force transmitted by the push-pull compression mechanism, the straight plate moves further to the side away from the driven door, the straight plate and the special-shaped plate move synchronously to the left side, the special-shaped plate is limited in the vertical position and can only move left and right, with the gradual movement of the special-shaped plate to the left, the inclined surface is pressed downward to the inclined groove in the inner side of the circular sliding groove, drives the circular sliding groove to slide downward in the inner side of the first layer base, and the long circular rod and the sleeve plate at the top of the circular sliding groove also move downward synchronously, the left sliding plate and the right sliding plate also move downward synchronously under the limitation of the connecting plate, the left sliding plate and the right sliding plate are also in the vertical position under the limitation of the limiting block, the distal end of the right sliding plate is clamped into the gear of the gear plate, and the spring slide lock mechanism is limited and locked, when the special-shaped plate moves to the side close to the driven door, the inclined surface of the special-shaped plate is fitted with the inclined surface in the inner side of the circular sliding groove due to the action of gravity, the special-shaped plate is limited in the vertical position and can only move left and right, with the gradual movement of the special-shaped plate to the right, the circular sliding groove moves upward in the inner side of the first layer base to return to the original position, and the left sliding plate and the right sliding plate also move upward synchronously under the limitation of the connecting plate, the left sliding plate and the right sliding plate move upward synchronously under the limitation of the limiting block, that is, the distal end of the right sliding plate moves upward and is separated from the limitation of the gear plate.

[0014] The technical effects and advantages of the present application are as follows: The present application is provided with a stretching clamping mechanism, through multi-stage linkage and deformation locking design, the problem that the traditional engineering machinery door lock is easy to be loosened and invalid under vibration impact can be solved, when the door body bears vertical pressure, the mechanism converts the linear pushing force transmitted by the push-pull compression mechanism into bidirectional locking force, the transverse displacement of the straight plate drives the circular sliding groove to be pressed vertically downward through the inclined surface of the special-shaped plate, forces the long circular rod to drive the sleeve plate to move downward synchronously, the left and right sliding plates are forced to guide by the limiting block and reset to the vertical position from the inclined state, the distal end of the right sliding plate is accurately clamped into the gear gap of the gear plate, mechanical hard limiting is formed, the stress relaxation defect caused by continuous vibration of the traditional pure spring lock tongue is avoided, even if the hard spring loses the pre-tightening force due to fatigue, the tooth-shaped clamping lock can still physically block the return path of the gear plate, the vibration resistance stability of the traditional door lock is improved a lot.

[0015] The present application greatly improves the response sensitivity and force transmission efficiency of the door lock to local deformation by providing a push-pull compression mechanism, using the principle of lever amplification and slope conversion. When the driven door is pressed, a small gap change in the door drives the push plate to rotate around the rotating rod as the fulcrum. The short arm end of the push plate amplifies the displacement through a certain lever ratio, and the long arm end pushes the inclined sliding block along the fixed angle through the extrusion block, so that the small displacement of the door gap can be converted into the large stroke of the inclined sliding block displacement. The displacement is accurately transmitted to the stretching clamping mechanism through the sliding rod. Compared with the traditional door lock that relies on the overall deformation of the door body to trigger the locking, the device can complete the locking response when the door gap is slightly deformed, avoiding the stubborn problem of misalignment of the lock caused by the slight deformation of the door frame of heavy engineering machinery. At the same time, the rigid guide frame formed by the fixed base and the limiting plate ensures that the mechanism still maintains high movement accuracy in special environments, which can alleviate the problem of easy jamming failure of the traditional sliding rod mechanism. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the present application.

[0017] Figure 2 It is a schematic diagram of the back of the overall structure of the present application.

[0018] Figure 3 It is a schematic diagram of the door lock structure of the present application.

[0019] Figure 4 It is a schematic diagram of the spring sliding lock mechanism structure of the present application.

[0020] Figure 5 It is a schematic diagram of the push-pull compression mechanism structure of the present application.

[0021] Figure 6 It is a schematic diagram of the stretching clamping mechanism structure of the present application.

[0022] Figure 7 It is a schematic diagram of the circular sliding groove structure of the present application.

[0023] Figure 8 It is a schematic diagram of the circular sliding groove and special-shaped plate structure of the present application.

[0024] The reference signs are: 1, driven door; 2, active door; 3, plug core door lock; 4, spring slide lock mechanism; 41, gear lock; 42, lock core; 43, hard spring; 44, fixed frame; 45, gear plate; 46, lock catch; 47, bolt; 48, large fixed plate; 5, stretching clamping mechanism; 51, first layer stretching mechanism; 511, first layer base; 512, special-shaped plate; 513, circular sliding groove; 514, straight plate; 52, two-layer extrusion mechanism; 521, second layer base; 522, small fixed plate; 523, left sliding plate; 524, right sliding plate; 525, limiting block; 53, extrusion rod mechanism; 531, long circular rod; 532, sleeve plate; 533, nut; 534, connecting plate; 6, push-pull compression mechanism; 61, push plate; 62, base frame; 63, fixed base; 64, limiting plate; 65, rotating rod; 66, extrusion block; 67, inclined sliding block; 68, sliding rod; 69, connecting disc. DETAILED DESCRIPTION

[0025] The technical solutions in the present application will be described clearly and completely below in combination with the drawings in the present application, and in addition, the forms of each structure described in the following embodiments are only examples, and the side door lock device for engineering machinery involved in the present application is not limited to each structure described in the following embodiments, and all other embodiments obtained by those skilled in the art without creative labor belong to the scope of protection of the present application.

[0026] With reference to Figure 1 and Figure 2 , the present application provides a side door lock device for engineering machinery, comprising a driven door 1 and an active door 2, the front end surface of the active door 2 is fixedly connected with a plug core door lock 3, the rear end of the active door 2 and the side corresponding to the plug core door lock 3 are rotatably connected with a spring slide lock mechanism 4, one side of the spring slide lock mechanism 4 is fixedly connected with a stretching clamping mechanism 5, the side away from the stretching clamping mechanism 5 of the spring slide lock mechanism 4 is provided with the driven door 1, and the bottom of the stretching clamping mechanism 5 is slidably connected with a push-pull compression mechanism 6 close to the spring slide lock mechanism 4. With reference to Figure 3 , the stretching clamping mechanism 5 comprises a two-layer extrusion mechanism 52 fixedly connected to the side of the spring slide lock mechanism 4 away from the driven door 1, the bottom of the two-layer extrusion mechanism 52 is fixedly connected with a first layer stretching mechanism 51, and the inside of the two-layer extrusion mechanism 52 and the first layer stretching mechanism 51 is provided with an extrusion rod mechanism 53.

[0027] With reference to Figure 3The spring slide lock mechanism 4 is the main lock eye structure of the structure. The driven door 1 and the active door 2 are locked in the opening and closing process. When one of the active door 2 and the driven door 1 is subjected to vertical pressure, the push-pull compression mechanism 6 is triggered to transmit the pressure to the stretching clamping mechanism 5, and then the extrusion rod mechanism 53 triggers the locking device to limit the spring slide lock mechanism 4.

[0028] With reference to Figure 4 The spring slide lock mechanism 4 comprises a large fixed plate 48 fixedly connected to the surface of the active door 2. The large fixed plate 48 is fixedly connected with a hard spring 43 on the side close to the driven door 1. The other side of the hard spring 43 is fixedly connected with a gear plate 45. The outer side of the gear plate 45 and the outer surface of the active door 2 are provided with a fixed frame 44. The other side of the gear plate 45 is fixedly connected with a bolt 47. The outer surface of the driven door 1 and the outer side corresponding to the bolt 47 are provided with a lock catch 46. The outer surface of the active door 2 and the top position corresponding to the gear plate 45 are fixedly connected with a gear lock 41. The center inner side of the gear lock 41 is fixedly connected with a lock cylinder 42.

[0029] With reference to Figure 4 After rotating the active door 2, the bolt 47 contacts the lock catch 46. Based on the design of the bevel, the hard spring 43 is compressed and the bolt 47 is clamped into the lock catch 46 under the limitation of the fixed frame 44, so that the locking purpose is achieved. When unlocking, the key is inserted into the inside of the lock cylinder 42. After rotating, the gear lock 41 rotates synchronously with the lock cylinder 42. When the gears rotate and mesh with each other, the gear plate 45 is pushed and the active door 2 is opened.

[0030] With reference to Figure 5 The push-pull compression mechanism 6 comprises a bottom plate frame 62 fixedly connected to the outer surface of the active door 2 and the bottom of the spring slide lock mechanism 4. The side of the bottom plate frame 62 away from the driven door 1 is fixedly connected with a fixed base 63. The side of the fixed base 63 close to the driven door 1 is fixedly connected with a limiting plate 64. The center of the bottom plate frame 62 is fixedly connected with a rotating rod 65. The outer side of the rotating rod 65 is rotatably connected with a push plate 61. The end of the push plate 61 away from the driven door 1 is rotatably connected with an extrusion block 66. The center of the fixed base 63 is slidably connected with a sliding rod 68. The end of the sliding rod 68 close to the driven door 1 is fixedly connected with an inclined sliding block 67. The other end of the sliding rod 68 is fixedly connected with a connecting disc 69.

[0031] With reference to Figure 5 When the driven door 1 is subjected to external pressure, the push plate 61 is rotated around the rotating rod 65. The other end of the push plate 61 extrudes the inclined sliding block 67. The inclined sliding block 67 moves towards the side close to the active door 2 under the limitation of the sliding rod 68, and transmits the external pressure to the stretching clamping mechanism 5.

[0032] With reference to Figure 6The two-layer extrusion mechanism 52 includes a second-layer base 521 fixedly connected to the side of the large fixed plate 48 away from the driven door 1 and the outer surface of the active door 2. A small fixed plate 522 is fixedly connected to the inner surface of the second-layer base 521 near the bottom, and a limiting block 525 is fixedly connected to the outer surface of the small fixed plate 522.

[0033] Reference Figure 6 The first-layer stretching mechanism 51 includes a first-layer base 511 fixedly connected to the bottom of the second-layer base 521, and the interior of the first-layer base 511 is slidably connected to a circular slide groove 513. The interior of the first-layer base 511 and the interior of the circular slide groove 513 are slidably connected to a straight plate 514, and the straight plate 514 is fixedly connected to a connecting plate 69 on the side close to the driven door 1.

[0034] Reference Figure 7 The extrusion rod mechanism 53 includes an elongated round rod 531 fixedly connected to the top of the circular slide groove 513, the outer surface of the elongated round rod 531 is fixedly connected to a sleeve plate 532, the outer surface of the bottom end of the sleeve plate 532 is fixedly connected to a connecting plate 534, and a left sliding plate 523 is provided on the outer side of the connecting plate 534 on the side away from the driven door 1 and the corresponding limit block 525 at the top, and a right sliding plate 524 is provided on the outer surface of the connecting plate 534 on the other side and the corresponding limit block 525 at the top, and a nut 533 is provided on the outer surface of the elongated round rod 531 and the top of the sleeve plate 532.

[0035] Reference Figure 6 、 Figure 7 and Figure 8, the oblique opening of the special-shaped plate 512 is located at the leftmost end of the inner sliding groove of the circular sliding groove 513, the circular sliding groove 513 is located at the inner upper side of the first layer base 511, the inclined surface of the special-shaped plate 512 is fitted with the inclined surface in the inner circular sliding groove 513, when the straight plate 514 receives the pushing force transmitted by the push-pull compression mechanism 6, the straight plate 514 further moves away from the driven door 1, the straight plate 514 moves synchronously to the left side with the special-shaped plate 512, the special-shaped plate 512 is limited in the vertical position and can only move left and right, with the gradual movement of the special-shaped plate 512 to the left, the inclined surface is pressed downward to the inclined groove in the inner circular sliding groove 513, drives the circular sliding groove 513 to slide downward in the first layer base 511, at the same time, the long circular rod 531 and the sleeve plate 532 at the top of the circular sliding groove 513 also move synchronously downward, the left sliding plate 523 and the right sliding plate 524 also move synchronously downward under the limitation of the connecting plate 534, under the limitation of the limiting block 525, the left sliding plate 523 and the right sliding plate 524 are also in the vertical position, the last end of the right sliding plate 524 is connected to the gear of the gear plate 45, limits and locks the spring sliding lock mechanism 4, when the special-shaped plate 512 moves towards the side close to the driven door 1, due to the action of gravity, the inclined surface of the special-shaped plate 512 is fitted with the inclined surface in the inner circular sliding groove 513, the special-shaped plate 512 is limited in the vertical position and can only move left and right, with the gradual movement of the special-shaped plate 512 to the right, the circular sliding groove 513 moves upward in the first layer base 511 and returns to the original position, at the same time, the left sliding plate 523 and the right sliding plate 524 also move synchronously upward under the limitation of the connecting plate 534, under the limitation of the limiting block 525, the left sliding plate 523 and the right sliding plate 524 move synchronously upward, that is, the last end of the right sliding plate 524 moves upward and is separated from the limitation of the gear plate 45.

[0036] The working principle of the present application: the spring slide lock mechanism 4 is the main lock eye structure of the structure, the driven door 1 and the active door 2 are locked in the process of opening and closing, when one of the active door 2 and the driven door 1 is subjected to vertical pressure, the push-pull compression mechanism 6 is triggered to transmit the pressure to the stretching clamping mechanism 5, and then the extrusion rod mechanism 53 triggers the locking device to limit the spring slide lock mechanism 4, after rotating the active door 2, the bolt 47 contacts the lock catch 46, and then the compression of the hard spring 43 based on the design of the bevel and under the limitation of the fixed frame 44, the bolt 47 is clamped into the lock catch 46, so that the purpose of locking is achieved, when unlocking, the key is inserted into the lock cylinder 42, after rotating, the gear lock 41 rotates synchronously with the lock cylinder 42, the gear plate 45 is pushed by the gear plate 45, and the active door 2 can be opened, the driven door 1 is subjected to external pressure, the push plate 61 rotates around the rotating rod 65, the other end of the push plate 61 extrudes the inclined slide block 67, the inclined slide block 67 is subjected to the pushing force and moves towards the side close to the active door 2 under the limitation of the sliding rod 68, and the external pressure is transmitted to the stretching clamping mechanism 5, in the initial position, the inclined mouth of the special-shaped plate 512 is located at the leftmost end of the circular slide groove 513 inside the circular slide groove 513, the circular slide groove 513 is located inside the first layer base 511 close to the upper side, the inclined surface of the special-shaped plate 512 is fitted with the inclined surface inside the circular slide groove 513, when the straight plate 514 feels the pushing force transmitted by the push-pull compression mechanism 6, the straight plate 514 moves away from the driven door 1, the special-shaped plate 512 moves to the left side synchronously, the special-shaped plate 512 is limited in the vertical position and can only move left and right, with the gradual movement of the special-shaped plate 512 to the left, the inclined surface presses the inclined groove inside the circular slide groove 513 downward, drives the circular slide groove 513 to slide downward in the first layer base 511, and the long circular rod 531 and the sleeve plate 532 at the top of the circular slide groove 513 also move downward synchronously, the left sliding plate 523 and the right sliding plate 524 also move downward synchronously under the limitation of the connecting plate 534, the left sliding plate 523 and the right sliding plate 524 are also in the vertical position under the limitation of the limiting block 525, the right end of the right sliding plate 524 is clamped into the gear of the gear plate 45, and the spring slide lock mechanism 4 is limited and locked, when the special-shaped plate 512 moves towards the side close to the driven door 1, the inclined surface of the special-shaped plate 512 is fitted with the inclined surface inside the circular slide groove 513 due to the action of gravity, the special-shaped plate 512 is limited in the vertical position and can only move left and right, with the gradual movement of the special-shaped plate 512 to the right, the circular slide groove 513 moves upward in the first layer base 511 to return to the original position, and the left sliding plate 523 and the right sliding plate 524 also move upward synchronously under the limitation of the connecting plate 534, the left sliding plate 523 and the right sliding plate 524 move upward synchronously under the limitation of the limiting block 525, that is, the right end of the right sliding plate 524 moves upward and is separated from the limitation of the gear plate 45.

[0037] Finally: the above only for the preferred embodiments of the present application, and not for limiting the present application, any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application, should be included in the scope of protection of the present application.

Claims

1. A side door locking arrangement for a construction machine comprising a driven door (1) and a driving door (2), characterized in that: The front end surface of the initiative door (2) is fixedly connected with a plug-in door lock (3), one side of the rear end of the initiative door (2) and the plug-in door lock (3) is rotatably connected with a spring sliding lock mechanism (4), one side of the spring sliding lock mechanism (4) is fixedly connected with a stretching clamping mechanism (5), the side, away from the stretching clamping mechanism (5), of the spring sliding lock mechanism (4) is provided with a driven door (1), and the bottom of the stretching clamping mechanism (5) is slidably connected with a push-pull pressing mechanism (6) on the side close to the spring sliding lock mechanism (4). The stretching clamping mechanism (5) comprises a two-layer extrusion mechanism (52) fixedly connected on the side, away from the driven door (1), of the spring sliding lock mechanism (4), and a first-layer stretching mechanism (51) fixedly connected on the bottom of the two-layer extrusion mechanism (52), and an extrusion rod mechanism (53) arranged in the two-layer extrusion mechanism (52) and the first-layer stretching mechanism (51).

2. A side door locking arrangement for a working machine according to claim 1, characterized in that: The spring sliding lock mechanism (4) comprises a large fixed plate (48) fixedly connected on the surface of the initiative door (2), a hard spring (43) fixedly connected on the side, close to the driven door (1), of the large fixed plate (48), a gear plate (45) fixedly connected on the other side of the hard spring (43), a fixed frame (44) arranged on the outer side of the gear plate (45) and the outer surface of the initiative door (2), a bolt (47) fixedly connected on the other side of the gear plate (45), a lock catch (46) arranged on the outer surface of the driven door (1) and the outer side corresponding to the bolt (47), a gear lock (41) fixedly connected on the outer surface of the initiative door (2) and the top position corresponding to the gear plate (45), and a lock core (42) fixedly connected in the center of the gear lock (41).

3. A side door locking arrangement for a working machine according to claim 1, characterized in that: The push-pull pressing mechanism (6) comprises a bottom plate frame (62) fixedly connected on the outer surface of the initiative door (2) and the bottom of the spring sliding lock mechanism (4), a fixed base (63) fixedly connected on the side, away from the driven door (1), of the bottom plate frame (62), a limiting plate (64) fixedly connected on the side, close to the driven door (1), of the fixed base (63), a rotating rod (65) fixedly connected on the center of the bottom plate frame (62), a push plate (61) rotatably connected on the outer side of the rotating rod (65), an extrusion block (66) rotatably connected on the end, away from the driven door (1), of the push plate (61), a sliding rod (68) slidably connected on the center of the fixed base (63), an inclined sliding block (67) fixedly connected on the end, close to the driven door (1), of the sliding rod (68), and a connecting disc (69) fixedly connected on the other end of the sliding rod (68).

4. A side door locking arrangement for a working machine according to claim 2, characterized in that: The two-layer extrusion mechanism (52) comprises a second-layer base (521) fixedly connected on the side, away from the driven door (1), of the large fixed plate (48) and the outer surface of the initiative door (2), a small fixed plate (522) fixedly connected on the inner surface of the second-layer base (521) on the side close to the bottom, and a limiting block (525) fixedly connected on the outer surface of the small fixed plate (522).

5. A side door locking arrangement for a working machine according to claim 2, characterized in that: The first layer stretching mechanism (51) comprises a first layer base (511) fixedly connected at the bottom of a second layer base (521), a circular sliding groove (513) slidably connected in the first layer base (511), and a straight plate (514) slidably connected in the first layer base (511) and the circular sliding groove (513), wherein the straight plate (514) is fixedly connected with a connecting disc (69) on the side close to the driven door (1).

6. A side door locking arrangement for a working machine according to claim 5, characterized in that: The extrusion rod mechanism (53) comprises an oblong rod (531) fixedly connected at the top of the circular sliding groove (513), a sleeve plate (532) fixedly connected to the outer surface of the oblong rod (531), a connecting plate (534) fixedly connected to the bottom end of the outer surface of the sleeve plate (532), a left sliding plate (523) provided on the outer side of the connecting plate (534) away from the driven door (1) and corresponding to the top limiting block (525), a right sliding plate (524) provided on the other connecting plate (534) and corresponding to the top limiting block (525), and a screw nut (533) provided on the outer surface of the oblong rod (531) and the top of the sleeve plate (532).

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