Folding door lock of passenger car middle door

Abstract

A folding door lock of a passenger car middle door comprises a car body, a folding door, a lock body and a lock pin, the lock body comprises an outer opening mechanism, an inner opening mechanism, a pull rod and a spring bolt, the spring bolt is arranged in the inner opening mechanism in a sliding mode, and the two ends of the pull rod are connected with the outer opening mechanism and the spring bolt respectively; the outer opening mechanism comprises an outer mounting shell, an outer handle and a lock cylinder, a push rod is arranged at the end part of the inner end of the lock cylinder, a sliding seat and a locking block are arranged at the inner end of the outer handle and on the outer side of the push rod, and a locking groove is formed in the side wall of the push rod; a shifting arm with one end hinged to the pull rod is rotationally arranged in the outer mounting shell, the other end of the shifting arm corresponds to the end of the push rod, the lock cylinder is rotated and extruded to push the shifting arm to rotate to drive the spring bolt to move in the using process, and a locking groove in the upper end of the push rod is matched with a locking block on the sliding base to prevent the lock cylinder from rebounding and resetting. The whole mechanism is stable, operation is convenient, and abrasion to the spring bolt is effectively avoided.

Description

Technical Field

[0001] The utility model relates to a door lock, in particular to a folding door lock for a middle door of a passenger car. Background Art

[0002] Buses are an important means of transportation for people's daily travel. In order to facilitate passengers to get on and off the bus, the middle doors of buses mostly adopt a folding door structure. When the folding door is in use, its door lock needs to be in a normally open state. Therefore, a block needs to be provided at the end of the lock tongue to prevent the lock tongue from locking with the lock pin. However, this structure is not only cumbersome to operate and structurally unstable, but also easy to cause damage to the lock tongue. Summary of the invention

[0003] The utility model aims to solve the deficiencies of the prior art and provides a folding door lock for a middle door of a bus which has the advantages of simple structure, reasonable design, stable structure, simple operation and long service life.

[0004] The utility model solves the technical problem by adopting the following technical scheme: a folding door lock for a middle door of a passenger car, comprising a car body and a folding door, a lock body being arranged on the folding door, a lock pin being arranged on the car body, the lock body comprising an outer opening mechanism, an inner opening mechanism, a pull rod and a lock tongue, the outer opening mechanism and the inner opening mechanism being arranged on the folding door, the lock tongue being slidably arranged in the inner opening mechanism, and the two ends of the pull rod being respectively connected with the outer opening mechanism and the lock tongue; the outer opening mechanism comprising an outer mounting shell, an outer handle and a lock core, the outer mounting shell and the outer handle being fixedly mounted on both sides of the inner and outer sides of the folding door, the lock core being arranged on the outer handle and the inner end extending into the outer mounting shell; a push rod being arranged at the inner end of the lock core, a sliding seat being arranged at the outer side of the push rod at the inner end of the outer handle, a locking block being slidably arranged on the sliding seat, and locking grooves matching the locking block being arranged at both upper and lower sides of the side wall of the push rod; a driving arm being rotatably arranged in the outer mounting shell, one end of the driving arm being hinged to the pull rod, and the other end of the driving arm being arranged corresponding to the end of the push rod. By adopting the above structure, when in use, the lock core is rotated and squeezed to push the push arm to rotate and drive the lock tongue to move. The locking groove at the upper end of the push rod cooperates with the locking block on the slide seat to prevent the lock core from rebounding and resetting, and ensure that the push rod abuts against the push arm to prevent the lock tongue from resetting and locking with the lock pin. The overall structure is stable, easy to operate, and effectively avoids wear on the lock tongue.

[0005] Preferably, the folding door is provided with a sliding hole, and the pull rod is slidably arranged in the sliding hole. The above structure ensures the smooth sliding of the pull rod during operation, making the overall use smoother.

[0006] Preferably, the slide is provided with an upper cover, the push rod is provided with a first return spring between the upper cover and the inner end of the lock core, a slide cavity is provided between the slide and the upper cover, the locking block is slidably arranged in the slide cavity, a second return spring is provided between the rear end of the locking block and the upper cover, and the slide is provided with side blocks on both sides of the locking block. With the above structure, the first return spring can ensure that the lock core is quickly reset when the locking block is separated from the locking groove, and the second return spring and the side block can ensure that the locking block can better enter the locking groove for locking.

[0007] Preferably, the inner ends of the outer handle are provided with slots on both sides, the lower side of the slide is provided with a retaining spring, and the slide, the upper cover, and the retaining spring are provided with retaining blocks that are engaged in the retaining slots at the positions corresponding to the slots of the outer handle. The above structure is convenient for assembly and can ensure that the slide will not be offset when the lock core rotates.

[0008] Preferably, the two locking grooves are arranged along the circumferential direction of the push rod side wall and the spacing is 90 degrees. The above structure is adopted to facilitate the use of the lock core and to facilitate the distinction between the locked and unlocked states of the lock tongue.

[0009] Preferably, the end of the push rod is provided with an arc head, and the end of the push arm facing the push rod is provided with a push plate. The above structure facilitates the cooperation between the push rod and the push arm, making the overall use smoother.

[0010] Preferably, the inner opening mechanism comprises an inner mounting shell arranged on the folding door, the lock tongue is slidably arranged in the inner mounting shell and the end thereof is fixedly connected to the pull rod, and the pull rod is provided with a third return spring between the end of the lock tongue and the inner mounting shell. With the above structure, when the lock block of the lock core is separated from the locking groove, the lock tongue can slide into the lock core for locking, making the overall use smoother.

[0011] Preferably, the lock tongue is provided with an inner opening groove, the inner mounting shell is rotatably provided with an inner handle, a torsion spring is provided between the inner handle and the inner mounting shell, and the inner handle is provided with an inner opening block extending into the inner opening groove. With the above structure, the lock tongue is opened by the inner handle, thereby increasing the function of the lock body.

[0012] The utility model has the advantages of simple structure, reasonable design, stable structure, simple operation and long service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the utility model;

[0014] Figure 2 It is a structural sectional view of the external opening mechanism of the utility model;

[0015] Figure 3 This utility model Figure 2A magnified image of point A;

[0016] Figure 4 It is a structural schematic diagram of the outer handle of the utility model;

[0017] Figure 5 It is the internal structure diagram of the external opening mechanism of the utility model;

[0018] Figure 6 It is a structural sectional view of the inner opening mechanism of the utility model.

[0019] In the figure: 1. lock body; 2. lock pin; 3. external opening mechanism; 31. external mounting shell; 32. external handle; 321. card slot; 33. lock core; 34. push rod; 341. locking slot; 342. first return spring; 343. arc head; 35. slide seat; 351. locking block; 352. upper cover; 353. slide cavity; 354. second return spring; 355. side block; 356. retaining spring; 357. card block; 36. lever arm; 361. push plate; 4. internal opening mechanism; 41. internal mounting shell; 42. internal handle; 43. torsion spring; 44. internal opening block; 5. pull rod; 51. third return spring; 6. lock tongue; 61. internal opening slot; 7. slide hole. DETAILED DESCRIPTION

[0020] The technical solution of the utility model is further described in detail below through specific embodiments and in conjunction with the accompanying drawings.

[0021] Example:

[0022] like Figures 1 to 6 A folding door lock for a middle door of a passenger car shown in the figure comprises a car body (not shown in the figure) and a folding door (not shown in the figure). A lock body 1 is provided on the folding door (not shown in the figure), and a lock pin 2 is provided on the car body (not shown in the figure). The lock body 1 comprises an outer opening mechanism 3, an inner opening mechanism 4, a pull rod 5, and a lock tongue 6. The outer opening mechanism 3 and the inner opening mechanism 4 are arranged on the folding door (not shown in the figure), and the lock tongue 6 is slidably arranged in the inner opening mechanism 4. The two ends of the pull rod 5 are respectively connected to the outer opening mechanism 3 and the lock tongue 6; a sliding hole 7 is provided on the folding door (not shown in the figure), and the pull rod 5 is slidably arranged in the sliding hole 7, thereby ensuring the smoothness of the sliding of the pull rod 5 during operation, making the overall use smoother.

[0023] The outer opening mechanism 3 comprises an outer mounting shell 31, an outer handle 32, and a lock core 33. The outer mounting shell 31 and the outer handle 32 are fixedly mounted on the inner and outer sides of the folding door (not shown in the figure). The lock core 33 is arranged on the outer handle 32 and the inner end thereof extends into the outer mounting shell 31. A push rod 34 is arranged at the inner end of the lock core 33. A slide seat 35 is arranged on the outer side of the push rod 34 at the inner end of the outer handle 32. A locking block 351 is slidably arranged on the slide seat 35. Locking grooves 341 matching the locking block 351 are arranged on the upper and lower sides of the side wall of the push rod 34. The two locking grooves 341 are arranged along the circumferential direction of the side wall of the push rod 34 and the spacing is 90°, which is convenient for the use of the lock core 33 and makes it easy to distinguish the locked and opened states of the lock tongue 6. 1 is rotatably provided with a lever arm 36, one end of which is hinged to the pull rod 5, and the other end of which is correspondingly provided with the end of the push rod 34, and an arc-shaped head 343 is provided at the end of the push rod 34, and a push plate 361 is provided at one end of the lever arm 36 facing the push rod 34, so as to facilitate the cooperation between the push rod 34 and the lever arm 36, and make the overall use smoother; when in use, the lever arm 36 is driven to rotate and move the lock tongue 6 by rotating and squeezing the lock cylinder 33, and the lock groove 341 at the upper end of the push rod 34 cooperates with the locking block 351 on the slide seat 35 to prevent the lock cylinder 33 from rebounding and resetting, so as to ensure that the push rod 34 abuts against the lever arm 36 to prevent the lock tongue 6 from resetting and locking with the lock pin 2, and the overall mechanism is stable, easy to operate, and effectively avoids the wear of the lock tongue 6.

[0024] The slide 35 is provided with an upper cover 352, and the push rod 34 is provided with a first return spring 342 between the upper cover 352 and the inner end of the lock core 33. The first return spring 342 can ensure that the lock core 33 is quickly reset when the locking block 351 is separated from the locking groove 341. A sliding cavity 353 is provided between the slide 35 and the upper cover 352, and the locking block 351 is slidably arranged in the sliding cavity 353. A second return spring 354 is provided between the rear end of the locking block 351 and the upper cover 352. Side blocks 355 are provided on both sides, and the second return spring 354 and the side blocks 355 can ensure that the locking block 351 can better enter the locking groove 341 for locking; the inner end of the outer handle 32 is provided with slots 321 on both sides, and the lower side of the slide 35 is provided with a retaining spring 356; the slide 35, the upper cover 352, and the retaining spring 356 are provided with blocks 357 that are connected to the slot 321 at the slots 321 corresponding to the slots 321 of the outer handle 32 on both sides, which is convenient for assembly and can ensure that the slide 35 will not be offset when the lock cylinder 33 rotates.

[0025] Preferably, the inner opening mechanism 4 includes an inner mounting shell 41 arranged on the folding door (not shown in the figure), the lock tongue 6 is slidably arranged in the inner mounting shell 41 and the end is fixedly connected to the pull rod 5, and the pull rod 5 is provided with a third return spring 51 between the end of the lock tongue 6 and the inner mounting shell 41, and when the lock core 33 is disengaged from the locking groove 341 by the locking block 351, the lock tongue 6 can slide into the lock core 33 for locking, so that the overall use is smoother; an inner opening groove 61 is provided on the lock tongue 6, and an inner handle 42 is rotatably provided on the inner mounting shell 41, a torsion spring 43 is provided between the inner handle 42 and the inner mounting shell 41, and an inner opening block 44 extending into the inner groove is provided on the inner handle 42, and the lock tongue 6 is opened by the inner handle 42, thereby increasing the function of the lock body 1.

[0026] The above-described embodiment is only a preferred solution of the present invention and does not limit the present invention in any form. There are other variations and modifications without exceeding the technical solution described in the claims.

Claims

1. A folding door lock for a passenger car middle door, comprising a car body and a folding door, wherein the folding door is provided with a lock body (1), and the car body is provided with a lock pin (2), characterized in that: The lock body (1) comprises an outer opening mechanism (3), an inner opening mechanism (4), a pull rod (5), and a lock tongue (6); the outer opening mechanism (3) and the inner opening mechanism (4) are arranged on the folding door; the lock tongue (6) is slidably arranged in the inner opening mechanism (4); the two ends of the pull rod (5) are respectively connected to the outer opening mechanism (3) and the lock tongue (6); the outer opening mechanism (3) comprises an outer mounting shell (31), an outer handle (32), and a lock core (33); the outer mounting shell (31) and the outer handle (32) are fixedly mounted on both sides of the folding door; the lock core (33) is arranged on the outer handle (32) ) and the inner end extends into the outer mounting shell (31); a push rod (34) is provided at the inner end of the lock core (33); a slide seat (35) is provided at the inner end of the outer handle (32) on the outer side of the push rod (34); a locking block (351) is slidably provided on the slide seat (35); locking grooves (341) matching the locking block (351) are provided on the upper and lower sides of the side wall of the push rod (34); a driving arm (36) is rotatably provided in the outer mounting shell (31); one end of the driving arm (36) is hinged to the pull rod (5), and the other end of the driving arm (36) is provided corresponding to the end of the push rod (34).

2. The folding door lock for a passenger car middle door according to claim 1, characterized in that: The folding door is provided with a sliding hole (7), and the pull rod (5) is slidably arranged in the sliding hole (7).

3. The folding door lock for a passenger car middle door according to claim 1, characterized in that: An upper cover (352) is provided on the slide seat (35); a first return spring (342) is sleeved on the push rod (34) between the upper cover (352) and the inner end of the lock core (33); a slide cavity (353) is provided between the slide seat (35) and the upper cover (352); the locking block (351) is slidably arranged in the slide cavity (353); a second return spring (354) is provided between the rear end of the locking block (351) and the upper cover (352); and the slide seat (35) is provided with side blocks (355) on both sides of the locking block (351).

4. The folding door lock for a passenger car middle door according to claim 3, characterized in that: The inner ends of the outer handle (32) are provided with slots (321) on both sides, the lower side of the slide seat (35) is provided with a retaining spring (356), and the slide seat (35), the upper cover (352), and the retaining spring (356) are provided with retaining blocks (357) that are engaged with the retaining slots (321) at both sides corresponding to the retaining slots (321) of the outer handle (32).

5. The folding door lock for a passenger car middle door according to claim 1, characterized in that: The two locking grooves (341) are arranged along the circumference of the side wall of the push rod (34) and are spaced 90 degrees apart.

6. The folding door lock for a passenger car middle door according to claim 1, characterized in that: An arc-shaped head (343) is provided at the end of the push rod (34), and a push plate (361) is provided at one end of the push arm (36) facing the push rod (34).

7. The folding door lock for a passenger car middle door according to claim 1, characterized in that: The inner opening mechanism (4) comprises an inner mounting shell (41) arranged on the folding door, the lock tongue (6) is slidably arranged in the inner mounting shell (41) and the end thereof is fixedly connected to the pull rod (5), and the pull rod (5) is provided with a third return spring (51) between the end of the lock tongue (6) and the inner mounting shell (41).

8. The folding door lock for a passenger car middle door according to claim 7, characterized in that: The lock tongue (6) is provided with an inner opening groove (61), the inner mounting shell (41) is rotatably provided with an inner handle (42), a torsion spring (43) is provided between the inner handle (42) and the inner mounting shell (41), and the inner handle (42) is provided with an inner opening block (44) extending into the inner opening groove.

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