Engineering machinery door lock and door lock pull rod device assembly matched with same

Abstract

The utility model provides an engineering machinery door lock and a door lock pull rod device assembly matched with the engineering machinery door lock. The unlocking lever is arranged in the shell of the door lock body and used for prying the unlocking handle outside the door to achieve unlocking, the resistance end of the unlocking lever is connected with the installation base at the upper end of the pull rod through the ball pair, and therefore the pull rod is allowed to deflect to a certain degree relative to the unlocking lever, assembly is easy, the requirement for manufacturing precision of parts is low, and the door lock is suitable for being popularized and used. And in addition, the adopted structure is easy to manufacture, and the cost is low. According to the door lock pull rod device assembly, a specific structure is adopted, the pull rod lever can be pushed by the unlocking push rod on the outward opening door handle, then the pull rod is driven to move downwards, unlocking is achieved, the structure is easy to manufacture, cost is low, and the opening sliding block is connected with the installation base at the lower end of the pull rod through a ball pair. And the pull rod is allowed to deflect by a certain angle relative to the pull rod lever, so that the assembly is easy, the requirement on the manufacturing precision of related parts is low, and the unlocking is light and smooth.

Description

Technical Field

[0001] The utility model relates to an engineering machinery door lock and accessories thereof, in particular to an engineering machinery door lock unlocked by a pull rod and a door lock pull rod device assembly used in conjunction with the door lock door lock. Background Art

[0002] Construction machinery door locks are one of the important guarantees for the safety of construction machinery (including cranes and various types of construction vehicles). They require high stability and simple operation. Because the cab height of some construction machinery is relatively high, in order to facilitate the unlocking operation, the door handle on the outside of the door is set at the bottom of the door, and a pull rod assembly is set inside the door. The operator operates the unlocking element on the door handle on the outside of the door (usually by pressing the unlocking button), drives the pull rod, and then pulls the unlocking element on the door lock to unlock.

[0003] In the prior art, the structure of unlocking by using a pull rod is relatively complex, resulting in a high product price. In addition, the structure of the prior art also has very high requirements for the manufacturing and assembly accuracy of parts, and often results in unsmooth unlocking (the structure connecting the pull rod is prone to jamming due to factors such as friction and manufacturing accuracy), which affects the user experience. Therefore, it is necessary to improve the structure of door lock products and related accessories for pull rod unlocking, reduce manufacturing costs, and make unlocking easier and smoother. Utility Model Content

[0004] In order to overcome the above-mentioned deficiencies in the prior art, the utility model provides an engineering machinery door lock and a door lock pull rod device assembly used in conjunction therewith. The engineering machinery door lock and door lock pull rod device assembly of the utility model adopt a specific structure, have low manufacturing cost, and make unlocking easier and smoother.

[0005] For the door lock, the utility model provides the following technical solutions:

[0006] An engineering machinery door lock comprises a door lock body; the door lock body comprises a shell, in which a locking mechanism and an outside door unlocking handle are arranged, and after locking, the door can be unlocked by operating the outside door unlocking handle; an unlocking lever is also arranged inside the shell; a prying tongue is arranged at the resistance end of the unlocking lever, and unlocking can be achieved by prying the outside door unlocking handle with the prying tongue; the power end of the unlocking lever is connected to a pull rod upper end mounting seat through a ball joint, and the pull rod upper end mounting seat extends from a clearance hole at the lower part of the shell to the outside of the shell; the end of the pull rod upper end mounting seat is provided with a connecting structure for mounting the pull rod.

[0007] Compared with the prior art, the utility model provides an unlocking lever in the shell of the door lock body for prying the unlocking handle outside the door to achieve unlocking. The resistance end of the unlocking lever is connected to the mounting seat on the upper end of the pull rod through a ball pair, thereby allowing the pull rod to have a certain deflection relative to the unlocking lever, making it easy to assemble and having low requirements on the manufacturing precision of parts. The use of the ball pair reduces friction, thereby making the unlocking easier and smoother. In addition, the adopted structure is easy to manufacture, has low cost, and is conducive to industrial implementation.

[0008] As an optimization, in the aforementioned engineering machinery door lock, the upper end mounting seat of the pull rod is a fisheye bearing, the resistance end of the unlocking lever is provided with a bolt mounting hole, and the fisheye bearing is connected to the unlocking lever by a bolt. The fisheye bearing is a standard part, and the ball pair is obtained by using the fisheye bearing, which is conducive to controlling costs.

[0009] As an optimization, in the aforementioned engineering machinery door lock, a reset torsion spring for resetting the unlocking lever is provided in the housing. Thus, after the unlocking lever is unlocked, it can be reset under the action of the reset torsion spring, reducing the workload of other reset elements in the lock and improving the reliability of the product.

[0010] As an optimization, in the aforementioned engineering machinery door lock, the lower end of the pull rod upper end mounting seat is processed with an internal thread for mounting the pull rod. Thus, the pull rod and the pull rod upper end mounting seat are connected by threads, the structure is easy to implement, and the assembly difficulty is low and the precision is high.

[0011] For the pull rod assembly, the utility model provides the following technical solutions:

[0012] The door lock pull rod device assembly includes a mounting plate and a cover shell arranged on the mounting plate; a bracket is provided on the inner side of the cover shell, and a guide seat is provided on the bracket; an opening slider slidably matched with the guide seat is provided on the guide seat, and a pull rod lever hinged with the guide seat; the resistance end of the pull rod lever cooperates with the lower end of the opening slider, and can pry the opening slider downward; the upper end of the opening slider is directly or indirectly connected to the pull rod lower end mounting seat through a ball joint; the pull rod lower end mounting seat is located outside the cover shell, and a connecting structure for installing the pull rod is provided at its end; a clearance hole is provided on the mounting plate for the unlocking push rod of the door handle outside the door to pass through, and after the unlocking push rod passes through the clearance hole, the power end of the pull rod lever can be pushed, thereby prying the opening slider downward.

[0013] Compared with the prior art, the door lock pull rod device assembly of the utility model adopts a specific structure. The pull rod lever can be pushed by the unlocking push rod on the outward opening door handle, and then drive the pull rod to move down to achieve unlocking. The structure is easy to manufacture and has low cost. The opening slider is directly or indirectly connected to the mounting seat at the lower end of the pull rod through a ball joint, allowing the pull rod to have a certain angle of deflection relative to the pull rod lever, making it easy to assemble, with low manufacturing precision requirements for related parts, and making unlocking easier and smoother.

[0014] As an optimization, in order to make the parts easier to manufacture, in the aforementioned door lock pull rod device assembly, the upper end of the opening slider is connected to the pull rod lower end mounting seat through a connecting rod, and the connecting rod is connected to the pull rod lower end mounting seat through a ball pair.

[0015] As an optimization, in the aforementioned door lock pull rod assembly, the lower end mounting seat of the pull rod is a fisheye bearing, the connecting rod is provided with a bolt mounting hole, and the fisheye bearing is connected to the connecting rod by bolts. The fisheye bearing is a standard part, and the ball pair is obtained by using the fisheye bearing, which is conducive to controlling costs.

[0016] As an optimization, in the aforementioned door lock rod assembly, the end of the rod lower end mounting seat is processed with an internal thread for mounting the rod. Thus, the rod and the rod lower end mounting seat are connected by threads, the structure is easy to implement, and the assembly difficulty is low and the precision is high.

[0017] As an optimization, in the aforementioned door lock pull rod assembly, a return spring is sleeved on the opening slider, the upper end of the return spring abuts against the flange at the top of the opening slider, and the lower end abuts against the bracket or guide seat. Therefore, after unlocking, the return spring can push the opening slider to move upward and reset, reducing the burden on other working components and improving the reliability of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of a door lock device in an embodiment of the utility model;

[0019] Figure 2 yes Figure 1 Sectional view of the middle door lock device in the direction of B (unlocked state);

[0020] Figure 3 yes Figure 1 Sectional view of the middle door lock device in the direction of B (locked state);

[0021] Figure 4 yes Figure 1 A-axis sectional view of the middle door lock device (unlocked state);

[0022] Figure 5 yes Figure 1 A-axis sectional view of the middle door lock device (locked state);

[0023] Figure 6 This is an A-direction view of the door lock device in the embodiment of the utility model;

[0024] Figure 7 This is a diagram of the door lock device in the embodiment of the utility model in use, that is, a state in which it is installed on a door.

[0025] The symbols in the accompanying drawings are:

[0026] 1-housing; 2-external unlocking handle; 3-unlocking lever, 301-pry tongue; 4-upper end mounting seat of pull rod; 5-reset torsion spring; 6-pull rod; 7-mounting plate; 8-cover; 9-bracket; 10-guide seat; 11-opening slider; 12-pull rod lever; 13-external door opening handle, 1301-unlocking push rod; 14-connecting rod; 15-reset compression spring; 16-lower end mounting seat of pull rod. DETAILED DESCRIPTION

[0027] The present invention is further described below in conjunction with the accompanying drawings and embodiments, but they are not intended to limit the present invention.

[0028] Example:

[0029] In the embodiment, the engineering machinery door lock, the door lock rod assembly, the rod 6 and the door handle 13 outside the door constitute a door lock device. Among them, the door handle 13 outside the door is a prior art. The operator can unlock the door by pressing the unlocking push rod 1301 on the door handle 13 outside the door (the outer end of the unlocking push rod 1301 is in the shape of a button), and operate the door unlocking handle 2 outside the engineering machinery door lock through the door lock rod assembly and the rod 6.

[0030] In an embodiment, a construction machinery door lock comprises a door lock body; the door lock body comprises a shell 1, in which a locking mechanism and an outside door unlocking handle 2 are arranged, and after locking, the door can be unlocked by operating the outside door unlocking handle 2 (in an embodiment, the door lock body is a prior art); its characteristics are: an unlocking lever 3 is also arranged inside the shell 1; a prying tongue 301 is arranged at the resistance end of the unlocking lever 3, and unlocking can be achieved by prying the outside door unlocking handle 2 with the prying tongue 301; the power end of the unlocking lever 3 is connected to a pull rod upper end mounting seat 4 through a ball joint, and the pull rod upper end mounting seat 4 extends from a clearance hole at the lower part of the shell 1 to the outside of the shell 1; a connecting structure for mounting a pull rod 6 is arranged at the end of the pull rod upper end mounting seat 4.

[0031] In the embodiment, the door lock pull rod device assembly includes a mounting plate 7 and a cover shell 8 arranged on the mounting plate 7; a bracket 9 is provided on the inner side of the cover shell 8, and a guide seat 10 is provided on the bracket 9; an opening slider 11 slidingly matched therewith and a pull rod lever 12 hinged therewith are provided on the guide seat 10; the resistance end of the pull rod lever 12 cooperates with the lower end of the opening slider 11, and can pry the opening slider 11 downward; the upper end of the opening slider 11 is indirectly connected to the pull rod lower end mounting seat 16 through a ball joint; the pull rod lower end mounting seat 16 is located outside the cover shell 8 (a corresponding clearance hole is provided on the cover shell 8), and a connecting structure for installing the pull rod 6 is provided at its end; a clearance hole is provided on the mounting plate 7 for the unlocking push rod 1301 of the door handle 13 outside the door to pass through. After the unlocking push rod 1301 passes through the clearance hole, the power end of the pull rod lever 12 can be pushed, thereby prying the opening slider 11 downward.

[0032] In the embodiment, the two ends of the pull rod 6 are respectively connected to the pull rod upper end mounting seat 4 and the pull rod lower end mounting seat 16, so that the engineering machinery door lock and the door lock pull rod device assembly are associated. When the operator presses the unlocking push rod 1301 on the door handle 13 outside the door to push the pull rod lever 12, the pull rod 6 is pulled down by the opening slider 11, and then the unlocking lever 3 is pulled to achieve unlocking. When unlocking, only the spherical surface in the ball pair needs to be slightly moved, the friction is small, and the unlocking process is relatively light and stable.

[0033] In the embodiment, the tie rod upper end mounting seat 4 is a fisheye bearing, the resistance end of the unlocking lever 3 is provided with a bolt mounting hole, and the fisheye bearing is connected to the unlocking lever 3 by bolts. The tie rod lower end mounting seat 16 is a fisheye bearing, the connecting rod 14 is provided with a bolt mounting hole, and the fisheye bearing is connected to the connecting rod 14 by bolts. The lower end of the tie rod upper end mounting seat 4 is processed with an internal thread for mounting the tie rod 6. The end of the tie rod lower end mounting seat 16 is processed with an internal thread for mounting the tie rod 6. The threaded connection is used to facilitate the adjustment of the total stroke during installation. The tie rod upper end mounting seat 4 and the tie rod lower end mounting seat 16 in the embodiment can be directly purchased as standard parts (internal thread fisheye bearings), which is conducive to cost control.

[0034] In the embodiment, the housing 1 is provided with a reset torsion spring 5 for resetting the unlocking lever 3. The opening slider 11 is sleeved with a reset compression spring 15, the upper end of which abuts against the flange at the top of the opening slider 11, and the lower end abuts against the guide seat 10. By providing the reset torsion spring 5 and the reset compression spring 15, when working, they drive the related parts to reset together with other spring reset elements of the lock, so that the product reliability is high.

[0035] In the embodiment, the upper end of the opening slider 11 is connected to the tie rod lower end mounting seat 16 via a connecting rod 14, and the connecting rod 14 is connected to the tie rod lower end mounting seat 12 via a ball pair. In the embodiment, the connecting rod 14 is mainly used to make the opening slider 11 compatible with other products and reduce the manufacturing difficulty.

[0036] In the embodiment, the upper and lower ends of the pull rod 6 are locked by nuts, so that the reliability of the product is further improved.

[0037] The engineering machinery door lock of this embodiment is developed on the basis of the company's existing product (patent document publication number is CN 210370266U), and the parts are highly universal, which is conducive to industrial implementation. The engineering machinery door lock and door lock pull rod assembly of the utility model are usually installed on the door of the engineering machinery cab, but are not limited to the use on the door of the engineering machinery cab, and can also be used in other occasions that meet the use requirements.

[0038] The above general description of the utility model involved in this application and the description of its specific implementation method should not be understood as limiting the technical solution of the utility model. Based on the disclosure of this application, those skilled in the art can add, reduce or combine the disclosed technical features in the above general description or / and the specific implementation method (including examples) without violating the constituent elements of the utility model involved, to form other technical solutions within the scope of protection of this application.

Claims

1. A door lock for construction machinery, comprising a door lock body; the door lock body comprising a housing (1), wherein a locking mechanism and an outside door unlocking handle (2) are arranged inside the housing (1), and after being locked, the door can be unlocked by operating the outside door unlocking handle (2); characterized in that: An unlocking lever (3) is also provided inside the shell (1); a prying tongue (301) is provided at the resistance end of the unlocking lever (3), and the unlocking handle (2) outside the door can be pried by the prying tongue (301) to achieve unlocking; the power end of the unlocking lever (3) is connected to a pull rod upper end mounting seat (4) through a ball joint, and the pull rod upper end mounting seat (4) extends from a clearance hole at the bottom of the shell (1) to the outside of the shell (1); the end of the pull rod upper end mounting seat (4) is provided with a connecting structure for mounting a pull rod (6).

2. The engineering machinery door lock according to claim 1, characterized in that: The mounting seat (4) at the upper end of the pull rod is a fisheye bearing, the resistance end of the unlocking lever (3) is provided with a bolt mounting hole or a rivet riveting hole, and the fisheye bearing is connected to the unlocking lever (3) via bolts or rivets.

3. The engineering machinery door lock according to claim 1, characterized in that: The housing (1) is provided with a return torsion spring (5) for returning the unlocking lever (3).

4. The engineering machinery door lock according to claim 1, 2 or 3, characterized in that: The lower end of the tie rod upper end mounting seat (4) is processed with an internal thread for mounting the tie rod (6).

5. Door lock pull rod assembly, characterized by: The invention comprises a mounting plate (7) and a cover shell (8) arranged on the mounting plate (7); a bracket (9) is arranged on the inner side of the cover shell (8), and a guide seat (10) is arranged on the bracket (9); an opening slider (11) which is slidably matched with the guide seat (10) is arranged on the guide seat (10), and a pull rod lever (12) which is hinged with the guide seat (10); the resistance end of the pull rod lever (12) is matched with the lower end of the opening slider (11) to pry the opening slider (11) downward; the upper end of the opening slider (11) is directly A pull rod lower end mounting seat (16) is directly or indirectly connected through a ball joint; the pull rod lower end mounting seat (16) is located outside the cover shell (8), and a connecting structure for mounting the pull rod (6) is provided at its end; a clearance hole is provided on the mounting plate (7) for an unlocking push rod (1301) of an outside door opening handle (13) to pass through, and after the unlocking push rod (1301) passes through the clearance hole, the power end of the pull rod lever (12) can be pushed, thereby prying the opening slider (11) downward.

6. The door lock pull rod assembly according to claim 5, characterized in that: The upper end of the opening slide block (11) is connected to the lower end mounting seat (16) of the pull rod via a connecting rod (14), and the connecting rod (14) is connected to the lower end mounting seat (16) of the pull rod via a ball joint.

7. The door lock pull rod assembly according to claim 6, characterized in that: The mounting seat (16) at the lower end of the pull rod is a fisheye bearing, and a bolt mounting hole or a rivet riveting hole is provided on the connecting rod (14), and the fisheye bearing is connected to the connecting rod (14) via bolts or rivets.

8. The door lock pull rod assembly according to claim 7, characterized in that: The end of the pull rod lower end mounting seat (16) is processed with an internal thread for mounting the pull rod (6).

9. The door lock pull rod assembly according to any one of claims 5 to 8, characterized in that: The opening slider (11) is sleeved with a return spring (15), the upper end of the return spring (15) abuts against the flange at the top of the opening slider (11), and the lower end abuts against the bracket (9) or the guide seat (10).

Images