Balance chain lock applied to double-column lifting machine

Abstract

The utility model relates to the field of lifting machines, and discloses a balance chain lock applied to a double-column lifting machine and a locking ruler strip, the locking ruler strip is arranged on the inner side of a lifting machine column, and a plurality of locking ruler hole positions are formed in the locking ruler strip in the length direction; the balance chain lock structure comprises a supporting frame connected to the inner side of a tackle, the two sides of the supporting frame are rotationally connected with lock plate structures respectively, bouncing structures are arranged on the outer sides of the lock plate structures, lock rulers are arranged at the lower ends of the lock plate structures, and torsional springs are arranged between the lock plate structures and the supporting frame. The torsion spring has the trend of bouncing the lock ruler into the lock ruler hole position, the bouncing structure is blocked by a chain of the lifting machine and can prevent the lock ruler from bouncing, the balance chain lock structure is provided, when the chain is disjointed, continuous falling of the tackle is limited in the first time, and the chain is prevented from being blocked by the bouncing structure. The safety of workers is guaranteed, and meanwhile the hydraulic oil cylinder is protected.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the field of lifting machine, concretely is a balanced chain lock for double column lifting machine. BACKGROUND

[0002] The double column lifting machine is mainly applied to lifting a car to a certain height, and the lifting machine needs to lift the car to a proper position in the working process to facilitate the car chassis maintenance work, and the lifting machine comprises a stand column, a supporting arm sliding table, a power device and a balancing device.

[0003] At present, the balancing device of the double column lifting machine in the field is mostly steel wire rope, but the space of the stand column of the double column lifting machine is limited, the steel wire rope cannot be applied to the cable wheel with matching diameter, therefore, the application of the unmatched cable wheel can increase the bending angle of the steel wire rope during work, thereby reducing the service life of the balancing steel wire rope, in addition, the steel wire has ductility, and cannot guarantee the balance of the lifting machine on both sides after being used for a long time, therefore, the steel wire rope is replaced by the chain, and the above problems can be solved, but since the chain structure is relatively complex, the inspection of the chain before operation is relatively tedious, if the chain hinge is worn during operation, the chain pitch is enlarged to cause disconnection, the disconnection time is faster than that of the steel wire rope, at this time, the hydraulic oil cylinder directly bears the load weight, can cause damage of the hydraulic oil cylinder or oil pipe due to excessive pressure, and the reaction time of the worker is almost zero, therefore, the lifting machine can be tilted or directly fall during operation, and the working safety is affected, therefore, the utility model designs a balanced chain lock for double column lifting machine, when the chain is disconnected, the chain lock piece is only subjected to the action force of the torsional spring, the lower end of the chain lock piece is immediately popped into the stand column lock bar lock hole, the movement of the block is limited, and the tilting or direct falling of the lifting machine block is avoided. UTILITY MODEL CONTENTS

[0004] In order to solve the problems in the background art, the utility model provides the following technical scheme: a balanced chain lock for double column lifting machine, comprising:

[0005] The lock ruler is arranged on the inner side of the lifting machine stand column, and a plurality of lock hole positions are formed on the lock ruler along the length direction.

[0006] Balanced chain lock structure, including support frame connected to the inside of the trolley, the support frame is rotatably connected with the lock piece structure on both sides, the outer side of the lock piece structure is provided with the pop-up structure, the lower end of the lock piece structure is provided with the lock ruler, the torsion spring is arranged between the lock piece structure and the support frame, the torsion spring has the tendency of the lock ruler pop-up, the pop-up structure is blocked by the chain of the lifting machine, and the lock ruler can be prevented from being popped up.

[0007] Two pin holes suitable for the shaft pin are formed in the support frame, two first torsion spring grooves are formed in the support frame, and a shaft hole suitable for the shaft pin is formed in the lock piece structure. The shaft pin passes through the pin hole and the shaft hole, and the end portion of the shaft pin is threadedly connected with a nut, a gasket is arranged between the nut and the lock piece structure, a second torsion spring groove is formed in the lock piece structure, and the torsion spring is sleeved on the shaft pin.

[0008] The pop-up structure is provided with a mounting pin, and the mounting pin is provided with an anti-wear gasket.

[0009] The anti-wear gasket is made of high-density polyethylene.

[0010] The support frame, the shaft pin, the lock ruler and the lock piece structure are made of low-alloy high-strength steel.

[0011] Technical effects:

[0012] The balanced chain lock structure applied to the double-column lifting machine can limit the continuous falling of the trolley in the first time in the case that the chain is disconnected, thereby ensuring the safety of the workers and protecting the hydraulic oil cylinder. BRIEF DESCRIPTION OF DRAWINGS

[0013] The accompanying drawings are used to provide a further understanding of the present application, and constitute a part of the specification, and are used to explain the present application together with embodiments of the present application, and do not constitute a limitation on the present application. In the drawings:

[0014] Figure 1 A balanced chain lock structure applied to a double-column lifting machine is disclosed in the embodiments of the present application;

[0015] Figure 2 A balanced chain lock structure of a double-column lifting machine is disclosed in the embodiments of the present application;

[0016] Figure 3 A balanced chain lock structure of a double-column lifting machine is disclosed in the embodiments of the present application;

[0017] Figure 4 A balanced chain lock structure of a double-column lifting machine is disclosed in the embodiments of the present application;

[0018] Figure 5 It is the balanced chain lock structure structural schematic diagram of the double column lifting machine of the utility model embodiment;

[0019] Figure 6 It is the balanced chain lock structure chain normal case schematic diagram of the double column lifting machine of the utility model embodiment;

[0020] Figure 7 It is the balanced chain lock structure chain abnormal case schematic diagram of the double column lifting machine of the utility model embodiment;

[0021] In the drawing: 1, stand; 2, trolley; 3, lock ruler; 4, balanced chain lock structure; 401, support frame; 401a, shaft pin hole; 401b, first torsional spring slot; 402, chain; 403, torsional spring; 404, shaft pin; 405, gasket; 406, nut; 407, lock piece structure; 407a, mounting pin; 407b, shaft hole; 407c, second torsional spring slot; 407d, lock ruler; 408, pop-up structure. DETAILED DESCRIPTION

[0022] The technical scheme in the embodiments of the utility model will be described clearly and completely below in conjunction with the drawings in the embodiments of the utility model, and obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments; based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0023] As Figures 1-7 Indicated, the balanced chain lock for double column lifting machine provided in the specific embodiment includes lock ruler 3, and the lock ruler 3 is arranged in the inner side of the lifting machine stand 1, and a plurality of lock ruler hole positions are formed along the length direction on the lock ruler 3; the lock ruler hole position is rectangular, and the rectangular lock ruler hole position is formed to reduce the difference of two sides tilting caused by trolley abnormal falling.

[0024] Balanced chain lock structure 4, including the support frame 401 connected to the inner side of the trolley 2, the support frame 401 both sides are rotatably connected with the lock piece structure 407, the outer side of the lock piece structure 407 is provided with the pop-up structure 408, the lower end of the lock piece structure 407 is provided with the lock ruler 407d, the torsional spring 403 is arranged between the lock piece structure 407 and the support frame 401, the torsional spring 403 has the tendency of the lock ruler 407d pops into the lock ruler hole position, and the pop-up structure 408 is blocked by the chain 402 of the lifting machine to prevent the lock ruler 407d from popping up;

[0025] As Figure 6As shown, this is the state when chain 402 has not broken abnormally. At this time, the locking plate structure (407) is subjected to the force of the torsion spring (4-3), but due to the resistance of the chain, the locking plate structure (4-7) is relatively balanced. At this time, the locking plate at the lower end of the locking plate structure (4-7) is inside the trolley (2), which does not affect the movement of the trolley inside the column.

[0026] like Figure 7 As shown, the balance chain lock structure 4 utilizes the lever principle to allow the locking plate structure 407 to be easily triggered in the event of an abnormal breakage of the chain 402. When the chain 402 breaks, the lifting chain 402 loses its obstruction to the lifting structure 408, and the elastic potential energy stored in the torsion spring 403 is released, which will immediately eject the lower locking ruler 407d. If the lower locking ruler 407d does not encounter a locking ruler hole after being ejected, the elastic potential energy of the torsion spring 403 remains unchanged, and the locking ruler 407d will be ejected into the first locking ruler hole encountered after falling. If the chain 402 breaks on one side, the locking ruler 407d on that side will be ejected into the nearest hole, causing the lifting trolley 2 to stop sliding downward. The locking ruler hole distance design ensures that the trolley 2 tilts due to the breakage of one side of the chain 402, and the tilt angle after locking is within a safe range.

[0027] The length of the locking bar 3 is the distance between the lowest and highest heights of the lifting trolley 2;

[0028] The locking holes are set at the lowest and highest heights of the lifting trolley 2.

[0029] The support frame 401 has two pin holes 401a for the shaft pin 404 to pass through, and two first torsion spring grooves 401b. The locking plate structure 407 has a shaft hole 407b for the shaft pin 404. The shaft pin 404 passes through the pin holes 401a and the shaft hole 407b. A nut 406 is threaded onto the end of the shaft pin 404. A washer 405 is provided between the nut 406 and the locking plate structure 407. A second torsion spring groove 407c is provided on the locking plate structure 407. A torsion spring 403 is sleeved on the shaft pin 404. One end of the torsion spring 403 is fixed to the first torsion spring groove 401b, and the other end is fixed to the second torsion spring groove 407c.

[0030] The pop-up structure 408 is provided with a mounting pin 407a, and an anti-wear washer is installed on the mounting pin 407a.

[0031] The anti-wear gasket is made of high-density polyethylene.

[0032] The support frame 401, the axle pin 404, the locking strip 3, and the locking plate structure 407 are all made of low-alloy high-strength steel, ensuring that the gravitational potential energy they possess will not damage the balance chain lock structure 4 in the event of an abnormal fall of the trolley.

[0033] It is to be noted that, in the present document, relational terms such as first and second and the like can be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises", "comprising", or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus.

[0034] While the embodiments of the present application have been illustrated and described, it will be understood by those skilled in the art that various changes, modifications, substitutions, and alterations can be made therein without departing from the spirit and scope of the application, which is defined by the appended claims and their equivalents.

Claims

1. A balance chain lock applied to a double-column lifting machine, characterized in that, The utility model relates to a lifting machine, including: Locking scale (3) is set up in the inside of lifting machine stand (1), a plurality of locking scale hole positions are set up on the locking scale (3) along the length direction; Balanced chain lock structure (4) includes the support frame (401) connected to the inside of the trolley (2), the both sides of support frame (401) are rotatablely connected with lock piece structure (407), the outside of lock piece structure (407) is provided with the pop-up structure (408), the lower end of lock piece structure (407) is provided with locking scale (407d), the lock piece structure (407) and support frame (401) are provided with torsion spring (403) between, torsion spring (403) has the tendency of locking scale (407d) pops into locking scale hole position, the pop-up structure (408) is blocked by the chain (402) of lifting machine can prevent locking scale (407d) pops up.

2. A counterbalance chain lock for a two-column lifting machine as defined in claim 1, wherein: Two pin holes (401a) suitable for the passage of shaft pin (404) are set up on the support frame (401), two first torsion spring grooves (401b) are set up on the support frame (401), the shaft hole (407b) suitable for the shaft pin (404) is set up on the lock piece structure (407), the shaft pin (404) passes through pin hole (401a) and shaft hole (407b), the end of shaft pin (404) is screw mounted with nut (406), nut (406) and lock piece structure (407) are provided with gasket (405) between, the second torsion spring groove (407c) is set up on the lock piece structure (407), the torsion spring (403) is sleeved on the shaft pin (404), one end of torsion spring (403) is fixed in first torsion spring groove (401b), the other end is fixed in second torsion spring groove (407c).

3. A counterbalance chain lock for a two-column lift as defined in claim 2, wherein: The pop-up structure (408) is provided with mounting pin (407a), the mounting pin (407a) is installed with anti-abrasion washer.

4. A counterbalance chain lock for a two-column lift as defined in claim 3, wherein: The material of anti-abrasion washer is high-density polyethylene.

5. A counterbalance chain lock for a two-column lift as defined in claim 4, wherein: The material of support frame (401), shaft pin (404), locking scale (3) and lock piece structure (407) is low-alloy high-strength steel.

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