Safety braking and locking device for driving shaft of lifting device

Abstract

The utility model belongs to the technical field of safety application of lifting devices, and particularly discloses a safety braking and locking device for a driving shaft of a lifting device, which comprises a bottom pedestal, a vertical bearing seat frame, a driving shaft, an upper pedestal, a stop block, a clamping groove, a lifting hydraulic cylinder, a connecting block and a limit stop rod. One end of the limiting stop rod is embedded into a clamping groove in the outer wall of the stop block. The lifting device has the advantages that the stopping block, the clamping groove, the lifting hydraulic cylinder, the connecting block and the limiting stopping rod which are arranged in a balanced mode and used in cooperation can conduct corresponding locking control on the driving shaft in the lifting state, and the situation that the driving shaft rotates, and potential safety hazards are caused is avoided; the stop block and the fixed welding plate are arranged on the driving shaft, the structure of the driving shaft is not changed, and the conventional service life and safety of the driving shaft are guaranteed; the PLC, the rotating speed sensor and the lifting hydraulic cylinder are used in cooperation, automatic control locking action between the limiting stop rod and the clamping groove of the stop block can be achieved, efficiency is high, and lock missing is avoided.

Description

Technical Field

[0001] The utility model belongs to the technical field of safety application of lifting devices, and particularly relates to a safety braking and locking device for a driving shaft of a lifting device. Background Art

[0002] Classified by the driving type of the lifting device, it is mainly divided into three categories: pneumatic, hydraulic, and mechanical. Among them, the hydraulic type is the most, the mechanical type is the second, and the pneumatic type is the least.

[0003] Mechanical lifts mainly include single-motor-driven screw lifts and double-motor-driven screw lifts. The characteristics of this type of lift are good synchronism. Since it is generally driven by a motor and uses a screw drive, there is no problem of oil leakage and pollution.

[0004] When the mechanical lift is working, after the driving shaft rotates and completes the lifting control of the upper pedestal through the motor power transmission gear, a set of lifting control gears, and a set of belt-driven vertical support arms, the stability of the driving shaft itself needs to be considered, and there should be no rotation phenomenon, that is, the driving shaft needs to be self-locked to achieve safe production operations.

[0005] Therefore, based on the above problems, the utility model provides a safety braking and locking device for a driving shaft of a lifting device. Summary of the Utility Model

[0006] Purpose of the Utility Model: The purpose of the utility model is to provide a safety braking and locking device for a driving shaft of a lifting device in view of the deficiencies of the prior art. It adopts a balanced layout design to limit and protect the driving shaft after lifting, prevent rotation problems, and achieve safe lifting control operations.

[0007] Technical Solution: A safety braking and locking device for a driving shaft of a lifting device provided by the utility model includes a bottom pedestal, a vertical belt bearing seat frame, a driving shaft, a motor power transmission gear, a set of lifting control gears, a set of belt-driven vertical support arms, and an upper pedestal. A plurality of stop blocks are evenly distributed on the driving shaft. Slots are respectively arranged on the outer walls of the stop blocks. Lifting hydraulic cylinders are respectively arranged on the bottom pedestal and below the stop blocks. Connecting blocks are respectively arranged at one ends of the lifting hydraulic cylinders. Limit stop rods are respectively arranged on one surfaces of the connecting blocks. One end of the limit stop rod is embedded in the slot on the outer wall of the stop block. The contact surfaces of the slot and the limit stop rod are respectively set as arc-shaped structures.

[0008] In the technical solution of the present utility model, the safety braking and locking device for the driving shaft of the lifting device further includes a fixed welding plate for welding the stop block on the outer wall of the driving shaft. The stop block is set as an arc-shaped structure.

[0009] For the technical solution of the present invention, the safety braking and locking device of the driving shaft of the lifting device further includes a rotational speed sensor disposed on the driving shaft, a rotational speed sensor disposed on the rotational speed sensor seat, a vertical frame disposed on the base seat, and a PLC controller disposed on the vertical frame. Among them, the PLC controller is respectively connected to the rotational speed sensor and the lifting hydraulic cylinder.

[0010] For the technical solution of the present invention, the contact surface between the stopper and the driving shaft is provided with a semi-circular structure.

[0011] For the technical solution of the present invention, at least three stop blocks and card slots are provided on the driving shaft, and at least three lifting hydraulic cylinders, connecting blocks, and limit stop rods are provided.

[0012] Compared with the prior art, the beneficial effects of a safety braking and locking device for the driving shaft of a lifting device of the present invention are as follows: 1. The evenly arranged and cooperatively used stop blocks, card slots, lifting hydraulic cylinders, connecting blocks, and limit stop rods can perform corresponding locking control on the driving shaft in the lifting state to prevent the driving shaft from rotating and causing potential production safety hazards; 2. The stop blocks and fixed welding plates provided on the driving shaft do not change the structure of the driving shaft, ensuring its normal service life and safety; 3. The cooperatively used PLC controller, rotational speed sensor, and lifting hydraulic cylinder can realize the automatic control locking action between the limit stop rod and the card slot of the stop block, with high efficiency and no missed locking. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0014] Figure 1 FIG. 1 is a front view structural schematic diagram of a safety braking and locking device for the driving shaft of a lifting device of the present invention;

[0015] FIG. 2a is a front view structural schematic diagram of the safety braking and locking device for the driving shaft of a lifting device of the present invention before locking;

[0016] FIG. 2b is a rear view structural schematic diagram of the safety braking and locking device for the driving shaft of a lifting device of the present invention after locking;

[0017] Among them, the serial numbers in the figure are as follows: 100 - bottom pedestal, 101 - vertical belt bearing seat frame, 102 - drive shaft, 103 - motor power transmission gear, 104 - lifting control gear, 105 - belt drive tooth vertical support arm, 106 - upper pedestal, 107 - stop block, 108 - fixed welding plate, 109 - card slot, 110 - lifting hydraulic cylinder, 111 - connecting block, 112 - limit stop rod, 113 - rotational speed sensor seat, 114 - rotational speed sensor, 115 - vertical frame, 116 - PLC controller. Specific implementation manner

[0018] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0019] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "top", "bottom", "one side", "the other side", "front", "rear", "middle part", "inside", "top end", "bottom end", etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention; the terms "first", "second", "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance; in addition, unless otherwise clearly defined and limited, the terms "installation", "connection", "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0020] Embodiment 1

[0021] As Figure 1 shown in FIGS. 1, 2a, and 2b, a safety braking and locking device for a lifting device drive shaft includes a bottom pedestal 100, a vertical belt bearing seat frame 101, a drive shaft 102, a motor power transmission gear 103, a set of lifting control gears 104, a set of belt drive tooth vertical support arms 105, and an upper pedestal 106.

[0022] A plurality of stop blocks 107 are evenly distributed on the drive shaft 102.

[0023] The outer walls of the stop blocks 107 are respectively provided with clamping grooves 109.

[0024] On the bottom pedestal 100 and below the stop blocks 107, lifting hydraulic cylinders 110 are respectively provided.

[0025] One ends of the lifting hydraulic cylinders 110 are respectively provided with connecting blocks 111.

[0026] One surfaces of the connecting blocks 111 are respectively provided with limit stop rods 112.

[0027] During lifting control, when the drive shaft 102 completes the lifting of the upper pedestal 106 on a set of belt-driven tooth vertical support arms 105 through a set of lifting control gears 104, the lifting hydraulic cylinders 110 are activated to raise the limit stop rods 112 on the connecting blocks 111 and embed one ends into the clamping grooves 109 on the outer walls of the stop blocks 107, thus completing the anti-rotation locking after the drive shaft 102 is lifted; the contact surfaces of the clamping grooves 109 and the limit stop rods 112 are respectively set as arc-shaped structures to ensure that the connection surfaces do not separate and are anti-slip.

[0028] Embodiment Two

[0029] On the basis of Embodiment One, the safety braking and locking device for the drive shaft of the lifting device further includes a fixed welding plate 108 that welds the stop block 107 to the outer wall of the drive shaft 102, so as not to damage the drive shaft 102 itself, ensure its integrity, and enable it to have the original strength and durability.

[0030] Among them, the stop block 107 is set as an arc-shaped structure, so that it can complete a tight fit with the limit stop rod 112, and at the same time occupies a small space and is also convenient for assembly.

[0031] Embodiment Three

[0032] On the basis of Embodiment One or Embodiment Two, the safety braking and locking device for the drive shaft of the lifting device further includes a rotational speed sensor seat 113 provided on the drive shaft 102, a rotational speed sensor 114 provided on the rotational speed sensor seat 113, a vertical frame 115 provided on the bottom pedestal 100, and a PLC controller 116 provided on the vertical frame 115; among them, the PLC controller 116 is respectively connected to the rotational speed sensor 114 and the lifting hydraulic cylinder 110.

[0033] During lifting control, the PLC controller 116 receives the feedback information of the rotational speed sensor 114 in real time; after the drive shaft 102 completes lifting and stops rotating, the rotational speed sensor 114 transmits the feedback information to the PLC controller 116 in real time, so that the PLC controller 116 controls the lifting hydraulic cylinder 110 to be activated to raise the connecting block 111 and the limit stop rod 112 and embed them into the clamping groove 109 on the outer wall of the stop block 107 according to the preset value "rotational speed is zero".

[0034] In addition, preferably, the contact surface between the stop block 107 and the drive shaft 102 is set as a semi-circular structure, which facilitates the rapid alignment between the stop block 107 and the drive shaft 102, and completes the precise and efficient fixed assembly through the fixed welding plate 108.

[0035] In addition, preferably, at least three stop blocks 107 and at least three clamping grooves 109 are provided on the drive shaft 102, and at least three lifting hydraulic cylinders 110, connecting blocks 111, and limit stop rods 112 are provided. The above design structure can ensure the balanced force of the drive shaft 102 during locking, and also endow it with corresponding stability and high load-bearing capacity.

[0036] There are two working principles of the safety braking and locking device for the drive shaft of the lifting device of this structure. Please refer to the descriptions of Embodiment 1 and Embodiment 3.

[0037] The base seat 100, vertical belt bearing seat frame 101, drive shaft 102, motor power transmission gear 103, a set of lifting control gears 104, a set of belt drive tooth vertical support arms 105, upper seat 106, lifting hydraulic cylinder 110, rotational speed sensor seat 11, rotational speed sensor 114, PLC controller 116, etc. in the safety braking and locking device for the drive shaft of the lifting device of this structure are all conventional components or devices. This application will not elaborate on them.

[0038] It should be noted that in this article, terms such as "including", "comprising" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. Without further limitations, an element defined by the statement "including one..." does not exclude the existence of additional identical elements in the process, method, article or device including the said element.

[0039] For those skilled in the art, it is obvious that the present utility model is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic characteristics of the present utility model. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present utility model is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be embraced within the present utility model. Any reference signs in the claims should not be regarded as limiting the claimed rights.

Claims

1. A safety braking and locking device for the drive shaft of a lifting device, comprising a bottom pedestal (100), a vertical belt bearing seat frame (101), a drive shaft (102), a motor power transmission gear (103), a set of lifting control gears (104), a set of belt drive tooth vertical support arms (105) and an upper pedestal (106), characterized in that: A number of stop blocks (107) are evenly distributed on the drive shaft (102), Card slots (109) are respectively arranged on the outer walls of the stop blocks (107), On the bottom pedestal (100) and located respectively below the stop blocks (107), lifting hydraulic cylinders (110) are arranged, Connecting blocks (111) are respectively arranged at one ends of the lifting hydraulic cylinders (110), Limit stop rods (112) are respectively arranged on one surfaces of the connecting blocks (111); Among them, one end of the limit stop rod (112) is embedded in the card slot (109) on the outer wall of the stop block (107), and the contact surfaces of the card slot (109) and the limit stop rod (112) are respectively set as arc-shaped structures.

2. The safety braking and locking device for the drive shaft of the lifting device according to claim 1, wherein: The safety braking and locking device for the drive shaft of the lifting device further includes a fixed welding plate (108) for welding the stop block (107) on the outer wall of the drive shaft (102); Among them, the stop block (107) is set as an arc-shaped structure.

3. The safety braking and locking device for the drive shaft of the lifting device according to claim 1 or 2, characterized in that: The safety braking and locking device for the drive shaft of the lifting device further includes a rotational speed sensor seat (113) arranged on the drive shaft (102), a rotational speed sensor (114) arranged on the rotational speed sensor seat (113), a vertical frame (115) arranged on the bottom pedestal (100), and a PLC controller (116) arranged on the vertical frame (115); Among them, the PLC controller (116) is respectively connected to the rotational speed sensor (114) and the lifting hydraulic cylinder (110).

4. The safety braking and locking device for the drive shaft of a lifting device according to claim 2, characterized in that: The contact surface between the stop block (107) and the drive shaft (102) is set as a semi-circular structure.

5. The safety braking and locking device for the drive shaft of a lifting device according to claim 1, characterized in that: There are at least three stop blocks (107) and card slots (109) on the drive shaft (102), and at least three lifting hydraulic cylinders (110), connecting blocks (111) and limit stop rods (112).

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