Stepping ladder for underground mine equipment

Abstract

The utility model discloses an underground mine equipment step ladder which comprises a mounting seat, a lifting plate and a step plate are movably mounted at the bottom of the mounting seat, one ends of the lifting plate and the step plate are connected with the mounting seat through a lifting plate fixing pin shaft and a step plate fixing pin shaft respectively, and the other ends of the lifting plate and the step plate are connected to the upper end of a connecting plate through a connecting plate upper pin shaft to form a step unit. And the plurality of step units are sequentially connected through the connecting plate lower pin shafts to form the multi-stage step ladder. An inclined power mechanism is arranged on one side of the mounting seat, a lifting screw is arranged in the mounting seat, and the lower end of the lifting screw is connected with the middle of the lifting plate through a lifting pin shaft. The power mechanism drives the lifting screw to rotate through the motor and the worm and gear so as to drive the step ladder to be unfolded or folded. The step ladder can realize automatic operation through a control part and comprises electrical elements such as a button switch, a contactor and a contact. The folding and unfolding device is compact in structure, small in occupied space and convenient to unfold and use when needed and fold when not needed, working efficiency is improved, and personnel safety is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of underground mining equipment, in particular to a step ladder for underground mining equipment. Background Art

[0002] Underground mining equipment is limited by the size of the shaft and tunnel, and has high requirements for the appearance and size of the equipment. Therefore, most equipment is not designed with step ladders or only has simple pedals for people to climb, which brings unnecessary safety risks to operators and further leads to low equipment efficiency. Summary of the Invention

[0003] The technical problem to be solved by the utility model is to provide an underground mining equipment step ladder, which can achieve the goal of occupying equipment space as low as possible for the underground mining equipment step ladder, and can be deployed for use when needed and folded and parked when not needed, thereby improving work efficiency and providing personnel safety.

[0004] In order to solve the above technical problems, the technical solution adopted by the utility model is as follows: an underground mining equipment step ladder, comprising a mounting base, a lifting plate and a tread plate movably mounted on the bottom of the mounting base, one end of the lifting plate being connected to the mounting base via a lifting plate fixing pin, one end of the tread plate being connected to the mounting base via a tread plate fixing pin, and the other ends of the lifting plate and the tread plate being connected to the upper end of the connecting plate via a pin on the connecting plate;

[0005] The lifting plate, connecting plate and tread plate together form a step unit, and multiple step units are connected to form a multi-step ladder structure. Except for the step unit connected to the mounting seat, the lifting plates and tread plates in the remaining step units are all connected to the lower pin shaft of the connecting plate at the lower end of the connecting plate of the previous step unit;

[0006] An oblique power mechanism is also provided on one side of the mounting seat, a lifting screw is passed through the power mechanism, and the lower end of the lifting screw is connected to the middle position of the lifting plate through a lifting pin.

[0007] In a preferred solution, in the step unit located at the bottom, the lifting plate and one end of the step plate are positioned and connected by parallel plates on both sides.

[0008] In a preferred solution, the power mechanism is fixed to the mounting seat via a mounting seat fixing pin, and the power mechanism can rotate on the mounting seat around the mounting seat fixing pin.

[0009] In a preferred embodiment, the power mechanism includes a motor, a worm gear and a worm, the worm gear is sleeved and fixed on the lifting screw, and the worm and the motor are connected by a shaft;

[0010] The worm wheel is provided with a threaded hole, and the lifting screw passes through the threaded hole and forms a threaded fit between the worm wheel and the lifting screw.

[0011] In a preferred embodiment, a control part is further included, wherein the control part includes a motor, and the motor forms a loop with the device power supply DC through two parallel circuits, and each of the two parallel circuits is provided with a normally open contact;

[0012] A branch circuit is connected in parallel to the main circuit where the device power supply DC is located. Two groups of push button switches are connected in parallel on the branch circuit. Contactors and normally closed contacts are connected in series to both groups of push button switches.

[0013] In a preferred solution, a fuse is provided on the main circuit where the backup power supply DC is located.

[0014] The utility model provides a step ladder suitable for underground mining equipment, which has the following beneficial effects by adopting the above structure:

[0015] (1) The step ladder of the utility model can be folded and stored. When not in use, it can be put away, taking up less space. It is particularly suitable for equipment in narrow space environments such as underground mines, thereby improving space utilization;

[0016] (2) Taking into account the safety of operation, the stability of the equipment during deployment and folding is ensured through a reasonable mechanical structure, reducing the safety hazards caused by equipment instability;

[0017] (3) An electrical control system is used to control the forward and reverse rotation of the motor through a button switch to achieve the movement conversion of the step ladder. The system responds quickly and reliably, reducing the probability of equipment failure due to mechanical failure. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0019] Figure 1 It is a schematic side view of the overall structure of the utility model in the unfolded state.

[0020] Figure 2 It is a schematic side view of the overall structure of the utility model in the folded state.

[0021] Figure 3 It is a partial three-dimensional structural diagram of the utility model.

[0022] Figure 4 This is a schematic diagram of the internal structure of the power mechanism of the utility model.

[0023] Figure 5 This is the motor circuit diagram of the utility model.

[0024] In the figure: mounting base 1, power mechanism 2, lifting screw 3, mounting base fixing pin 4, lifting pin 5, lifting plate fixing pin 6, tread plate fixing pin 7, lifting plate 8, connecting plate upper pin 9, connecting plate lower pin 10, connecting plate 11, tread plate 12, parallel plate 13, worm gear 14, worm 15, fuse 16, push button switch 17, contactor 18, normally open contact 19, normally closed contact 20, motor 21. DETAILED DESCRIPTION

[0025] Example 1:

[0026] This embodiment provides an underground mining equipment step ladder, which mainly includes the following parts:

[0027] 1. Mounting seat 1

[0028] 2. Riser 8

[0029] 3. Tread 12

[0030] 4. Connecting plate 11

[0031] 5. Power mechanism 2

[0032] 6. Control part

[0033] The specific structural features are as follows:

[0034] Mounting base 1: The mounting base serves as the basic support for the entire step ladder, is used to fix other components, and is connected to the power mechanism 2 through the mounting base fixing pin 4.

[0035] The lifting plate 8 and the tread plate 12 are connected to the mounting base 1 through the lifting plate fixing pin 6 and the tread plate fixing pin 7 respectively, forming the basic framework of a single tread unit.

[0036] Connecting plate 11: The lifting plate 8 and tread plate 12 in each step unit are connected to the upper end of the connecting plate 11 through the pin 9 on the connecting plate; except for the first step unit, the lifting plates 8 and tread plates 12 of other units are connected to the lower pin 10 of the connecting plate at the lower end of the connecting plate 11 of the previous unit.

[0037] Power mechanism 2: installed on one side of the mounting base 1, containing a lifting screw 3 inside, the lower end of the lifting screw 3 is connected to the middle of the lifting plate 8 through a lifting pin 5.

[0038] Functional Description

[0039] When the step ladder is needed, the worm gear mechanism is driven by the motor to cause the lifting screw 3 to move axially, thereby driving the step ladder to unfold.

[0040] When not in use, reverse the motor and the step ladder can be folded up to save space.

[0041] Example 2:

[0042] The power mechanism 2 specifically consists of a motor 21, a worm gear 14, and a worm 15. The worm gear 14 is fixed to the lifting screw 3, and the worm 15 is connected to the shaft of the motor 21, forming a transmission relationship. When the motor 21 is operating, the worm 15 drives the worm gear 14 to rotate, which in turn drives the lifting screw 3 to move.

[0043] Control section

[0044] The unfolding and folding of the step ladder is completed by the control part, which includes:

[0045] The motor 21 is connected to the device power supply DC via two parallel circuits, each circuit being provided with a normally open contact 19 .

[0046] A branch circuit is connected in parallel to the main circuit. The branch circuit has two groups of push button switches 17 . Each group of push button switches 17 is connected in series with a contactor 18 and a normally closed contact 20 .

[0047] Operation process

[0048] Expand operation: Press SB1-1 in the push button switch 17, and the current passes through the push button switch 17, contactor 18, and normally closed contact 20 in sequence. After the contactor 18 is energized, the normally open contact 19KA1 is closed and turned on, and the motor 21 rotates forward.

[0049] Stowing operation: Press SB2-1 in the button switch 17, the operation is the same as above, but the motor 21 rotates in the reverse direction.

[0050] Safety measures

[0051] A fuse 16 is provided on the main circuit to prevent damage to the equipment due to excessive current in the event of overload or short circuit.

[0052] Before each operation, check whether all components are normal to ensure safe operation.

[0053] On the basis of the above scheme:

[0054] The lifting screw 3 adopts a T-type thread to increase the thread stress surface and strength.

[0055] The lifting pin 5 can be adjusted in position according to the force requirement, and the farther the distance from the lifting plate fixing pin 6 is, the more proportional the lifting force provided.

[0056] The motor 21 is a DC motor. When the device does not have a matching power supply, a transformer can be used for voltage conversion and a rectifier can be used for rectification to adjust the power supply.

[0057] In order to increase the output torque of the power mechanism 2, the power of the motor 21 can be increased.

[0058] In order to increase the output torque of the power mechanism 2, the number of teeth of the worm gear 14 can be increased to improve the transmission ratio.

[0059] In the control part, the voltage of all electrical appliances is consistent, but not limited to consistency. Low voltage can be used to control high voltage, and low current can be used to control high current.

Claims

1. A step ladder for underground mining equipment, characterized by: The utility model comprises a mounting seat (1), a lifting plate (8) and a tread plate (12) are movably mounted on the bottom of the mounting seat (1), one end of the lifting plate (8) is connected to the mounting seat (1) through a lifting plate fixing pin (6), one end of the tread plate (12) is connected to the mounting seat (1) through a tread plate fixing pin (7), and the other ends of the lifting plate (8) and the tread plate (12) are connected to the upper end of the connecting plate (11) through a pin (9) on the connecting plate; The lifting plate (8), the connecting plate (11) and the step plate (12) together form a step unit, and a plurality of step units are connected to form a multi-step ladder structure. Except for the step unit connected to the mounting seat (1), the lifting plates (8) and step plates (12) in the remaining step units are all connected to the connecting plate lower pin (10) at the lower end of the connecting plate (11) of the previous step unit; An oblique power mechanism (2) is also provided on one side of the mounting seat (1), and a lifting screw (3) is provided inside the power mechanism (2). The lower end of the lifting screw (3) is connected to the middle position of the lifting plate (8) through a lifting pin (5).

2. The underground mining equipment step ladder according to claim 1, characterized in that: In the step unit located at the bottom, the lifting plate (8) and one end of the step plate (12) are positioned and connected via parallel plates (13) on both sides.

3. The underground mining equipment step ladder according to claim 1, characterized in that: The power mechanism (2) is fixed on the mounting seat (1) via the mounting seat fixing pin shaft (4), and the power mechanism (2) can rotate on the mounting seat (1) around the mounting seat fixing pin shaft (4).

4. An underground mining equipment step ladder according to claim 1 or 3, characterized in that: The power mechanism (2) includes a motor (21), a worm wheel (14) and a worm (15), wherein the worm wheel (14) is sleeved and fixed on the lifting screw (3), and the worm (15) is axially connected to the motor (21); The worm wheel (14) is provided with a threaded hole, and the lifting screw (3) passes through the threaded hole and forms a threaded fit with the worm wheel (14).

5. The underground mining equipment step ladder according to claim 1, characterized in that: It also includes a control part, the control part includes a motor (21), the motor (21) forms a loop with the device power supply DC through two parallel circuits, and each of the two parallel circuits is provided with a normally open contact (19); A branch circuit is connected in parallel to the main circuit where the power supply DC of the device is located. Two groups of push button switches (17) are connected in parallel on the branch circuit. Contactors (18) and normally closed contacts (20) are connected in series to the two groups of push button switches (17).

6. The underground mining equipment step ladder according to claim 5, characterized in that: A fuse (16) is provided on the main circuit where the backup power supply DC is located.

Images