New driving structure and driving method of chain arm saw for mining

Abstract

The present invention relates to the field of mining machinery, and specifically to a novel drive structure and drive method for a chain saw for use in mines. The drive structure includes a first drive assembly, a second drive assembly, and a box assembly. The first drive assembly is provided with a first reducer having a cylindrical outer shell and an input shaft concentric with an output shaft. The second drive assembly is provided with a two-stage worm gear transmission pair, and the worm gear of the second-stage transmission pair is fixedly connected to the outer shell of the first reducer and drives the outer shell of the first reducer to rotate. The driving method is that the second drive assembly drives the outer shell of the first reducer of the first drive assembly to rotate and drive the saw arm of the chain saw fixed to the outer shell to swing. The output shaft of the first reducer drives the sprocket of the chain saw fixed to the output shaft to rotate to drive the chain movement. When the saw arm swings, the chain saw can be driven to swing together. The present invention can improve the stability and safety of the chain saw, making the equipment more compact and lowering the cost.

Description

Technical Field

[0001] The present invention relates to the field of mining machinery, and in particular to a novel driving structure and driving method of a chain arm saw for mining. Background Art

[0002] In conventional chain saw drive systems used in mining, the swinging power required for the saw arm is relatively low (approximately 1.5 to 3 kW). This is typically achieved by a smaller drive unit, which is decelerated via a two-stage worm gear transmission within a housing. A rotatable hollow shaft is located within the housing, and the worm gear of the final stage of the drive unit is affixed to the shaft. This drive unit rotates the shaft, driving the saw arm, which is affixed to the shaft, to swing. Chain saw cutting, on the other hand, requires a higher power (approximately 22 to 37 kW), typically requiring a larger drive unit. This larger drive unit is locked outside the housing and drives the chain saw's sprocket and chain via a drive shaft passing through the hollow shaft. The structure of a conventional chain saw can be found in the article "Types and Structural Composition of Chain Saws," published in Sichuan Building Materials, Issue 4, 2013, 1672-4011(2013)04-0167-04. Because the reducer and motor of the larger drive unit that drives the chainsaw are large and suspended outside the casing, the center of gravity of the chain saw's drive mechanism shifts outward, creating a risk of instability and unsafe operation. Furthermore, the chain saw operates in both upright and horizontal positions during mining. Therefore, to accommodate the chain saw's transition between different operating positions, a clearance must be reserved to allow the saw to flip. Conventional chain saws, with their larger drive unit's reducer suspended on one side, make the overall structure of the equipment bulkier, making it unsuitable for operation in confined spaces and for transport. Summary of the Invention

[0003] To overcome the shortcomings of the prior art, the present invention discloses a novel drive structure and drive method for a chain saw for mining. The drive structure includes a first drive assembly, a second drive assembly, and a housing assembly. The first drive assembly includes a first reducer having a cylindrical housing and a concentric input shaft and output shaft. The second drive assembly includes two pairs of worm gear transmissions for a two-stage transmission, with the worm gear of the second-stage transmission pair being fixedly attached to the housing of the first reducer. The second drive assembly can drive the housing of the first reducer to rotate. The two pairs of worm gear transmissions of the second drive assembly and the first reducer are both disposed within the housing of the housing assembly and are rotationally connected to the housing. The drive method comprises the second drive assembly driving the housing of the first reducer to rotate and thereby causing the saw arm of the chain saw fixedly attached to the housing to swing. The output shaft of the first reducer drives the sprocket of the chain saw fixedly attached to the output shaft to rotate, thereby driving the chain to move. When the saw arm swings, the chain saw can be driven to swing along with it. The present invention embeds the first reducer of the first drive assembly into the box body of the box assembly and the second drive assembly drives the outer shell of the first reducer to rotate, and utilizes the outer shell and the output shaft of the first reducer to rotate respectively to drive the saw arm and the chain saw to move, and the saw arm drives the chain saw to swing to achieve feeding and cutting of the stone, thereby avoiding the problem of outward displacement of the center of gravity caused by the reducer for driving the chain saw on the traditional chain arm saw being suspended outside the box body, thereby improving the stability and safety of the chain arm saw and making the equipment more compact.

[0004] To achieve the above object, the technical solution adopted by the present invention is as follows:

[0005] A new drive structure for a chain arm saw used in mines includes a box assembly, wherein the box assembly is provided with a box body and the box body is a hollow cavity, and the box body can support and accommodate a reducer with a rotatable outer shell and a transmission component that drives the reducer outer shell to rotate. It is characterized in that: it also includes a first drive assembly and a second drive assembly, the first drive assembly is provided with a reducer with a cylindrical outer shell, the second drive assembly is provided with a motor and a transmission component, and the transmission component can drive the outer shell of the reducer of the first drive assembly to rotate, and the transmission component of the second drive assembly and the reducer of the first drive assembly are both placed in the box body of the box assembly and are both rotatably connected to the box body.

[0006] The first drive assembly includes a first motor and a first reducer. The output shaft of the first motor is connected to the input shaft of the first reducer. The first motor is placed outside the box body of the box assembly and locked on the box body. The first reducer has a cylindrical outer shell and its input shaft is concentric with the output shaft. The rotation center of its outer shell is concentric with the rotation centers of its output shaft and input shaft. The first reducer can be a planetary reducer or a cycloid pinwheel reducer. The first reducer is placed in the box body of the box assembly, and the outer shell of the first reducer is rotatably connected to the box body.

[0007] The housing of the first reducer is exposed outside the box assembly at the output end of the reducer, and the exposed housing is used for detachably fixing the saw arm of the chain arm saw thereto.

[0008] The output shaft of the first speed reducer is placed outside the box body of the box assembly, and the output shaft is used for the sprocket of the chain saw of the chain arm saw to be detachably fixed thereto.

[0009] The second drive assembly includes a transmission component including a first worm, a first worm wheel, a second worm and a second worm wheel. The first worm wheel is detachably fixed to the second worm. The first worm is vertically placed above or below the second worm and the first worm and the first worm wheel are meshed with each other to form a first-stage transmission pair. The second worm is vertically placed above the second worm wheel and is meshed with the second worm wheel to form a second-stage transmission pair. The second worm wheel is sleeved on the outer casing of the first reducer and is detachably fixed to the outer casing. The first worm and the second worm are both rotatably connected to the box body of the box assembly.

[0010] The second drive assembly also includes a second motor and a second reducer. The second motor is directly connected to the second reducer. The second motor and the second reducer are both placed outside the box assembly and the second reducer is locked on the box. The output shaft of the second reducer is connected to the first worm.

[0011] The box assembly is provided with sealable end covers and bearing seats with bearings at the input and output ports of the box body, and the bearing seats are used to support the housing of the first reducer and the first worm and second worm of the second drive assembly which are rotatably connected to the box body.

[0012] The novel drive structure of the chain arm saw for mining has the following driving method: the second drive assembly drives the outer shell of the first reducer of the first drive assembly to rotate through a transmission member composed of a worm gear transmission pair, thereby driving the saw arm of the chain arm saw fixed to the outer shell to swing; the output shaft of the first reducer of the first drive assembly drives the sprocket of the chain saw fixed to the output shaft to rotate, thereby driving the annular toothed chain of the chain saw movably placed on the saw arm to perform linear motion, and when the saw arm swings, the chain saw can be driven to swing together.

[0013] As can be seen from the above description, the advantages of the novel driving structure and driving method of the chain arm saw for mining provided by the present invention are as follows: the first reducer of the first driving assembly is embedded in the housing of the box assembly and the second driving assembly drives the outer shell of the first reducer to rotate, the outer shell and the output shaft of the first reducer are rotated respectively to drive the saw arm and the chain saw to move, and the saw arm drives the chain saw to swing to achieve feeding and cutting of the stone. Since the first reducer of the first driving assembly is placed in the housing of the box assembly, firstly, the actual center of gravity of the driving device of the chain arm saw is closer to the theoretical center of the housing, which can avoid the problem of the center of gravity shifting outward caused by the chain saw driving reducer on the traditional chain arm saw being suspended outside the housing, thereby improving the stability and safety of the chain arm saw; secondly, the space occupied by the reducer for driving the chain saw that needs to be suspended outside the housing of the traditional chain arm saw is reduced, making the equipment more compact. The present invention has a reasonable design, a simple structure, low cost, and is easy to promote. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a general schematic diagram of the novel drive structure of the chain arm saw for mining according to the present invention;

[0015] Figure 2 for Figure 1 A-direction enlarged schematic diagram;

[0016] Figure 3 for Figure 2 BB enlarged schematic diagram in;

[0017] Figure 4 is a partially cutaway schematic diagram of the second drive assembly mounted on the box assembly;

[0018] Figure 5 The figure is a schematic diagram of the transmission relationship of the novel drive structure of the chain arm saw for mining according to the present invention.

[0019] Reference numerals:

[0020] 1 first drive assembly; 11 first motor; 12 first reducer; 121 housing; 2 second drive assembly; 21 second motor; 22 second reducer; 23 first worm; 24 first worm wheel; 25 second worm; 26 second worm wheel; 3 box assembly; 31 box body; 800 chain saw; 900 saw arm. DETAILED DESCRIPTION

[0021] The present invention is further described below through specific embodiments.

[0022] like Figure 1 、 Figure 2 and Figure 5As shown, the novel drive structure of the chain arm saw for mining described in the present invention includes a first drive assembly 1, a second drive assembly 2, and a box assembly 3. The box assembly 3 is provided with a box body 31, and the box body 31 is a hollow body. The box body 31 can support and accommodate a reducer with a rotatable shell and a transmission component that drives the reducer shell to rotate. The input and output ports of the box body 31 are provided with sealable end covers and bearing seats with bearings. The first drive assembly 1 includes a first motor 11 and a first reducer 12. The output shaft of the first motor 11 is connected to the input shaft of the first reducer 12. The first motor 11 is placed outside the box body 31 of the box assembly 3 and locked to the box body 31. The first reducer 12 is a reducer with a cylindrical shell 121 and a concentric input shaft and output shaft. The rotation center of the shell 121 is concentric with the rotation centers of the output shaft and the input shaft. The first reducer 12 can be a planetary reducer or a cycloidal pinwheel reducer. In this embodiment, the first reducer 12 is a planetary reducer. The first reducer 12 is housed within the housing 31 of the housing assembly 3, and its housing 121 is rotatably connected to a bearing seat with bearings on the housing 31. The housing 121 of the first reducer 12 is exposed outside the housing 31 of the housing assembly 3 at the output end of the reducer. The exposed housing 121 is used to removably secure the saw arm 900 of the chain saw. The output shaft of the first reducer 12 is located outside the housing 31 of the housing assembly 3. This output shaft is used to removably secure the sprocket of the chain saw 800 of the chain saw. The second drive assembly 2 is provided with a transmission component consisting of two pairs of worm gear transmission pairs with two-stage transmission, and the worm gear of the second-stage transmission pair is fixedly connected to the housing 121 of the first reducer 12 of the first drive assembly 1. The second drive assembly 2 can drive the housing 121 of the first reducer 12 of the first drive assembly 1 to rotate. The transmission component of the second drive assembly 2 is placed in the box body 31 of the box assembly 3 and is rotatably connected to the box body 31.

[0023] like Figures 1 to 5As shown, the second drive assembly 2 described in the present invention includes a second motor 21, a second reducer 22, a first worm 23, a first worm wheel 24, a second worm 25, and a second worm wheel 26. The first worm wheel 24 is detachably fixed to the second worm 25, and the first worm 23 is vertically placed above or below the second worm 25, and the first worm 23 and the first worm wheel 24 are engaged with each other to form a first-stage transmission pair. In this embodiment, the first worm 23 is vertically placed below the second worm 25, and the second worm 25 is vertically placed above the second worm wheel 26 and is engaged with the second worm wheel 26 to form a second-stage transmission pair. The second worm wheel 26 is sleeved on the housing 121 of the first reducer 12 and is detachably fixed to the housing 121. The first worm 23 and the second worm 25 are both rotatably connected to the bearing seat with bearings on the box body 31. The second motor 21 is directly connected to the second reducer 22. The second motor 21 and the second reducer 22 are both placed outside the box body 31 of the box assembly 3 and the second reducer 22 is locked on the box body 31. The output shaft of the second reducer 22 is connected to the first worm 23.

[0024] The novel driving structure of the chain arm saw for mining described in the present invention has the following driving method: the second driving component 2 drives the outer casing 121 of the first reducer 12 of the first driving component 1 to rotate through a transmission component composed of a first worm 23, a first worm wheel 24, a second worm 25 and a second worm wheel 26, thereby driving the saw arm 900 of the chain arm saw fixed to the outer casing 121 to swing; the output shaft of the first reducer 12 of the first driving component 1 drives the sprocket of the chain saw 800 fixed to the output shaft to rotate, thereby driving the annular toothed chain of the chain saw 800 movably placed on the saw arm 900 to move linearly, and when the saw arm 900 swings, it can drive the chain saw 800 to swing together to realize feeding and cutting of stone.

[0025] The present invention embeds the first reducer of the first drive assembly into the box body of the box assembly and the second drive assembly drives the outer shell of the first reducer to rotate, and utilizes the outer shell and the output shaft of the first reducer to rotate respectively to drive the saw arm and the chain saw to move, and the saw arm drives the chain saw to swing to achieve feeding and cutting of the stone, thereby avoiding the problem of outward displacement of the center of gravity caused by the reducer for driving the chain saw on the traditional chain arm saw being suspended outside the box body, thereby improving the stability and safety of the chain arm saw and making the equipment more compact.

[0026] In the description of the present invention, the terms "first" and "second" are used to define positions. The use of "first" and "second" is only for the convenience of simplifying the description and has no specific meaning of order unless otherwise stated.

[0027] The above is only a specific embodiment of the present invention, but the design concept of the present invention is not limited to this. Any non-substantial changes to the present invention using this concept shall be deemed as an infringement of the protection scope of the present invention.

Claims

1. A novel drive structure for a chain arm saw for mining, comprising a box assembly (3), wherein the box assembly (3) is provided with a box body (31) and the box body (31) is a hollow body, wherein the box body (31) can support and accommodate a reducer with a rotatable housing and a transmission member for driving the reducer housing to rotate, and wherein the novel drive structure comprises: The invention also includes a first drive assembly (1) and a second drive assembly (2), wherein the first drive assembly (1) is provided with a reducer having a cylindrical outer shell, and the second drive assembly (2) is provided with a motor and a transmission component, wherein the transmission component can drive the outer shell of the reducer of the first drive assembly (1) to rotate, and the transmission component of the second drive assembly (2) and the reducer of the first drive assembly (1) are both placed in a box body (31) of the box assembly (3) and are both rotatably connected to the box body (31).

2. The novel driving structure of the chain arm saw for mining according to claim 1 is characterized in that: The first drive assembly (1) comprises a first motor (11) and a first reducer (12), the output shaft of the first motor (11) being connected to the input shaft of the first reducer (12), the first motor (11) being placed outside the box body (31) of the box assembly (3) and being locked on the box body (31), the first reducer (12) being a reducer having a cylindrical outer shell (121) and having an input shaft concentric with an output shaft, the rotation center of the outer shell (121) being concentric with the rotation centers of the output shaft and the input shaft, the first reducer (12) being placed inside the box body (31) of the box assembly (3), and the outer shell (121) of the first reducer (12) being rotatably connected to the box body (31).

3. The novel driving structure of the chain arm saw for mining according to claim 2 is characterized in that: The housing (121) of the first reducer (12) is exposed outside the box body (31) of the box assembly (3) at the output end of the reducer, and the exposed housing (121) is used for fixing the saw arm (900) of the chain arm saw thereto.

4. The novel driving structure of the chain arm saw for mining according to claim 2 is characterized in that: The output shaft of the first speed reducer (12) is placed outside the box body (31) of the box assembly (3), and the output shaft is used for fixing the sprocket of the chain saw (800) of the chain arm saw to the output shaft.

5. The novel driving structure of the chain arm saw for mining according to claim 2 is characterized in that: The second drive assembly (2) includes a transmission component including a first worm (23), a first worm wheel (24), a second worm (25) and a second worm wheel (26); the first worm wheel (24) is detachably fixed to the second worm (25); the first worm (23) is vertically arranged above or below the second worm (25) and the first worm (23) and the first worm wheel (24) are meshed with each other to form a first-stage transmission pair; the second worm (25) is vertically arranged above the second worm wheel (26) and is meshed with the second worm wheel (26) to form a second-stage transmission pair; the second worm wheel (26) is sleeved on the housing (121) of the first reducer (12) and is detachably fixed to the housing (121); the first worm (23) and the second worm (25) are both rotatably connected to the box body (31) of the box assembly (3).

6. The novel driving structure of the chain arm saw for mining according to claim 5 is characterized in that: The second drive assembly (2) further comprises a second motor (21) and a second reducer (22), wherein the second motor (21) is directly connected to the second reducer (22), the second motor (21) and the second reducer (22) are both placed outside the box body (31) of the box assembly (3), and the second reducer (22) is locked on the box body (31), and the output shaft of the second reducer (22) is connected to the first worm (23).

7. The novel driving structure of the chain arm saw for mining according to claim 6 is characterized in that: The box assembly (3) is provided with sealable end covers and bearing seats with bearings at the input port and output port of the box body (31).

8. The novel driving structure of the chain arm saw for mining according to any one of claims 1 to 7, characterized in that: The driving method comprises the following steps: the second driving assembly (2) drives the housing (121) of the first reducer (12) of the first driving assembly (1) to rotate via a transmission member formed by a worm gear transmission pair, thereby driving the saw arm (900) of the chain arm saw fixed to the housing (121) to swing; the output shaft of the first reducer (12) of the first driving assembly (1) drives the sprocket of the chain saw (800) fixed to the output shaft to rotate, thereby driving the annular toothed chain of the chain saw (800) movably placed on the saw arm (900) to perform linear motion; and when the saw arm (900) swings, the chain saw (800) can be driven to swing together.

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