A simple assembly experimental device for teaching based on three-dimensional space mechanism

Abstract

The invention discloses a simple assembly experimental device for teaching based on a three-dimensional space mechanism, the assembly experimental device comprises a three-dimensional frame, a plurality of matching sets of mechanical structures, a driving motor and an electrical box, the mechanical structure, the driving motor and the electrical box are all detachably arranged on the three-dimensional frame, the driving motor is electrically connected to the electrical box for driving the mechanical structure to move, and a motor debugging button and a power switch are installed on the panel of the electrical box. The invention integrates a belt transmission mechanism, an external gear mechanism, a swing guide rod mechanism, a gear rack mechanism, a worm gear mechanism, a conical gear mechanism, a parallelogram mechanism, a crank rocker slider mechanism, and a Malta groove wheel mechanism, and can assemble a plane mechanism and a space mechanism according to actual needs, which is helpful to strengthen students' mechanical innovation awareness and improve their comprehensive mechanical design capabilities.

Description

Technical Field

[0001] The invention belongs to the technical field of mechanical design experimental teaching supplies, and in particular relates to a simple assembly experimental device for teaching based on a three-dimensional space mechanism. Background Art

[0002] The most prominent problem in the quality of talent training is that students have weak practical ability and lack of innovative spirit. Therefore, it is particularly important to cultivate students' innovative spirit and ability through practical courses in teaching. Mechanism assembly is one of the most basic ways of mechanical innovation design. Setting up space mechanism assembly experiments is an effective measure to cultivate students' mechanical innovation awareness and innovation ability.

[0003] The backwardness of mechanism assembly experimental equipment is a major obstacle to the cultivation of students' innovative thinking and innovative ability. Therefore, there is a need for experimental equipment conditions with complete functions, convenient disassembly and assembly, and flexibility. At present, mechanism assembly experiments are mainly limited to planar mechanism overlaps such as one degree of freedom and a single power source. In addition, traditional mechanism assembly experimental equipment is usually large in size and cumbersome to operate, which is not conducive to achieving the expected teaching objectives. Summary of the invention

[0004] In view of the problems existing in the prior art, the purpose of the design of the present invention is to provide a simple assembly experimental device for teaching based on a three-dimensional space mechanism. The assembly experimental device is particularly suitable for mechanical innovation design experimental teaching, overcoming the shortcomings of traditional mechanism assembly experimental equipment. It can not only assemble planar mechanisms, but also assemble spatial mechanisms, and has the characteristics of small size, compact structure, complete functions, convenient and flexible disassembly and assembly, and low economic cost. It can effectively develop design comprehensive experiments, train students' structural innovation ability, and improve the quality of practical teaching.

[0005] The present invention is achieved through the following technical solutions:

[0006] The described simple assembly experimental device for teaching based on a three-dimensional space mechanism is characterized in that the assembly experimental device includes a three-dimensional frame, a plurality of matching sets of mechanical structures, a drive motor and an electrical box. The mechanical structure, the drive motor and the electrical box can be detachably arranged on the three-dimensional frame. The drive motor is electrically connected to the electrical box to drive the mechanical structure to move. A motor debugging button and a power switch are installed on the panel of the electrical box.

[0007] The described simple assembly experimental device for teaching based on a three-dimensional space mechanism is characterized in that the three-dimensional frame includes a bottom frame, a top frame and a middle frame, the bottom frame is assembled from multiple cross beams, the length of the bottom frame is the same as that of the top frame, the width of the bottom frame is greater than the width of the top frame, the top frame is composed of four cross beams to form a rectangular structure, the middle frame is connected to the bottom frame and the top frame by multiple groups of symmetrically arranged columns, and the three-dimensional frame is also provided with a number of detachable short columns and short beams for supporting the mechanical structure.

[0008] The described simple assembly experimental device for teaching based on a three-dimensional space mechanism is characterized in that the mechanical structure includes one or a combination of more than one of a belt drive mechanism, an external gear mechanism, a swing guide rod mechanism, a gear rack mechanism, a worm gear mechanism, a conical gear mechanism, a parallelogram mechanism, a crank rocker slider mechanism, and a Malta sheave mechanism, and each of the above mechanisms is directly or indirectly driven by a drive motor.

[0009] The simple assembly experimental device for teaching based on a three-dimensional space mechanism is characterized by:

[0010] The belt transmission mechanism is composed of a V-belt pulley, a belt, and a connecting shaft. The V-belt pulley is sleeved on the connecting shaft, and the V-belt pulleys on different connecting shafts are connected by belts.

[0011] The external gear mechanism is composed of a large spur gear, a small spur gear and a connecting shaft. The large spur gear and the small spur gear are meshed with each other, and the small spur gear is connected to the V-belt pulley through the connecting shaft.

[0012] The swing guide rod mechanism is composed of a rocker, a large spur gear, and a bearing support. The bearing support is fixedly arranged on the three-dimensional frame. One end of the rocker is connected to the bearing support, and the other end of the rocker is connected to the large spur gear.

[0013] The gear rack mechanism is composed of a small spur gear, a rack, a wheel, a connecting rod, a slider, a connecting shaft, a bearing support, and a support guide rail. The two ends of the support guide rail are fixed on the column. Two sliders are slidably arranged on the support guide rail. The lower end of the slider is fixedly connected with a rack. One end of the rack is connected to the wheel through a connecting rod. The wheel is coaxially connected to the large spur gear through a connecting shaft. The small spur gear is fixed to the crossbeam through a bearing support and meshes with the rack.

[0014] The worm gear mechanism is composed of a worm wheel, a worm, and a bearing support. The worm is fixed on a short column through a bearing support, and the worm wheel is matched with the worm.

[0015] The bevel gear mechanism is composed of a large bevel gear, a small bevel gear, and a connecting shaft. The small bevel gear is connected to one end of the worm, and the large bevel gear is fixed to the three-dimensional frame through the connecting shaft. The large bevel gear is meshed with the small bevel gear.

[0016] The parallelogram mechanism is composed of wheels, connecting rods, connecting shafts, and bearing supports. The wheels are coaxially installed with the small spur gear through the connecting shaft. Two wheels are installed on the left and right sides at the same height as the wheels through the bearing supports. The three wheels are connected together through connecting rods.

[0017] The crank rocker slider mechanism is composed of a connecting rod, a slider, a connecting shaft, a bearing support, and a support guide rail. The support guide rail and the bearing support are installed on a three-dimensional frame. The slider is slidably set on the support guide rail. Four connecting rods are connected together through a slider and two bearing supports, among which one end of three connecting rods and one end of two connecting rods are coaxial.

[0018] The Malta sheave mechanism is assembled from a main sheave, a slave sheave, a connecting shaft, and a bearing support. The main sheave is installed on a three-dimensional frame through a connecting shaft and a bearing support, and the slave sheave is installed on the three-dimensional frame through a bearing support. The main sheave and the slave sheave are meshed with each other.

[0019] The simple assembly experimental device for teaching based on a three-dimensional space mechanism is characterized in that the maximum torque of the driving motor is 16.9 Nm, the maximum speed is 18 r / min, the voltage is AC 220 V 50 Hz, and the power is 0.9 KW.

[0020] The simple assembly experiment device for teaching based on a three-dimensional space mechanism is characterized in that a moving groove is provided on the rocker, and a convex column for extending into the moving groove is provided on the large spur gear.

[0021] The simple assembly experiment device for teaching based on a three-dimensional space mechanism is characterized in that each component involved in the mechanical structure is provided with one or more.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] 1) The present invention integrates a belt transmission mechanism, an external gear mechanism, a swing guide rod mechanism, a gear rack mechanism, a worm gear mechanism, a conical gear mechanism, a parallelogram mechanism, a crank rocker slider mechanism, and a Malta sheave mechanism. Planar mechanisms and spatial mechanisms can be assembled according to actual needs, which helps to enhance students' awareness of mechanical innovation and improve their comprehensive mechanical design capabilities;

[0024] 2) The present invention has the characteristics of small size, compact structure, complete functions, convenient and flexible disassembly and assembly operation, and low economic cost. It can effectively develop design comprehensive experiments, improve the level of existing institutional assembly experimental equipment, and improve practical teaching methods;

[0025] 3) The present invention allows students to assemble the conceived mechanism on the frame using relevant parts and observe the movement characteristics of the mechanism, which can not only cultivate students' hands-on ability, but also cultivate students' ability to use innovative thinking to understand the knowledge they have learned;

[0026] 4) The present invention can be used as a practical teaching case to guide students to conduct space mechanism assembly experiments, allowing students to integrate comprehensive knowledge from multiple disciplines and fields into the practical process, exercise students' structural innovation capabilities, and improve the quality of practical teaching. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a structural schematic diagram of the three-dimensional frame of the present invention;

[0028] Figure 2 This is a schematic diagram of the appearance of the electrical box;

[0029] Figure 3 This is a schematic diagram of the structure assembled in Example 1;

[0030] Figure 4 This is a schematic diagram of the structure assembled in Example 2;

[0031] Figure 5 This is a schematic diagram of the structure assembled in Example 3;

[0032] Figure 6 This is a schematic diagram of the structure assembled in Example 4;

[0033] Figure 7 This is a schematic diagram of the structure assembled in Example 5;

[0034] Figure 8 This is a schematic diagram of the structure assembled in Example 6;

[0035] Fig. 9 This is a schematic diagram of the structure assembled in Example 7;

[0036] Fig.10 This is a schematic diagram of the structure assembled in Example 8;

[0037] Figure 11-12 This is a schematic diagram of the structure assembled in Example 9;

[0038] In the figure, 1-three-dimensional frame, 2-support guide rail, 3-electrical box, 4-main groove wheel, 5-slave groove wheel, 6-bearing support, 7-drive motor, 8-V pulley, 9-worm, 10-belt, 11-large bevel gear, 12-small spur gear, 13-rocker, 14-large spur gear, 15-connecting shaft, 16-wheel, 17-connecting rod, 18-small bevel gear, 19-worm gear, 20-rack, 21-slider, 22-column, 23-crossbeam, 24-bottom frame, 25-middle bracket, 26-top frame, 27-panel, 28-motor debugging knob, 29-power switch. DETAILED DESCRIPTION

[0039] The present invention is further described in detail below with reference to the accompanying drawings, and specific embodiments are given.

[0040] The present invention discloses a simple assembly experiment device for teaching based on a three-dimensional space mechanism, which includes a three-dimensional frame, a mechanical structure, a driving motor, and an electrical box. Various mechanical structures can be assembled on the three-dimensional frame using relevant parts, and the assembled mechanical structure is driven by a motor. The entire mechanism can be moved by turning on the switch of the electrical box, which can not only perform assembly training, but also observe and learn the movement characteristics of the mechanism. The maximum torque of the driving motor is 16.9Nm, the maximum speed is 18r / min, the voltage is AC 220V 50Hz, and the power is 0.9KW. The motor is connected by a belt transmission mechanism. The mechanism can be moved by turning on the power supply, and the rationality of the design of the innovative model of the space mechanism can be tested. In order to ensure safe use, convenient operation and beautiful equipment, an electrical box is equipped, and a motor debugging knob and a power switch are set on the panel of the electrical box, such as Figure 2 shown.

[0041] like Figure 1 As shown in the figure, the three-dimensional rack is composed of a bottom frame, a top frame and a middle frame, and its maximum shape is length × width × height equal to 1200mm × 350mm × 650mm. The width of the bottom frame is larger and is composed of 10 beams. The top frame is a rectangular shape composed of 4 beams, and the length is the same as the bottom frame. The middle frame connects the bottom frame and the top frame together through 8 columns, and is also equipped with some relatively short columns and beams to support the corresponding mechanical structure. In order to develop more types of assembly schemes, a certain number of columns and beams can be added at any time on the basis of the original three-dimensional rack, but only the middle frame can be changed, and the bottom frame and the top frame are fixed.

[0042] The mechanical structure is the core and key of the space mechanism assembly experimental device, including belt transmission mechanism, external gear mechanism, swing guide rod mechanism, gear rack mechanism, worm gear mechanism, conical gear mechanism, parallelogram mechanism, crank rocker slider mechanism, Malta groove wheel mechanism, etc. The mechanical structure is composed of a variety of parts, mainly V-belt pulley, belt, large spur gear, small spur gear, rocker, wheel, rack, connecting rod, slider, worm gear, worm, large bevel gear, small bevel gear, main groove wheel, slave groove wheel, connecting shaft, bearing support, support guide rail, etc. At least one of each part is set, and multiple parts can be set according to needs. The operator needs to conceive the mechanical structure to be assembled in advance, and then use the relevant parts for assembly to achieve the purpose of mechanical innovation design.

[0043] The belt drive mechanism can be assembled from a V-belt pulley, a belt, and a connecting shaft; the external gear mechanism can be assembled from a large spur gear, a small spur gear, and a connecting shaft; the swing guide rod mechanism can be assembled from a rocker, a large spur gear, and a bearing support; the rack and pinion mechanism can be assembled from a small spur gear, a rack, a wheel, a connecting rod, a slider, a connecting shaft, a bearing support, and a support guide rail; the worm gear mechanism can be assembled from a worm gear, a worm, and a bearing support; the bevel gear mechanism can be assembled from a large bevel gear, a small bevel gear, and a connecting shaft; the parallelogram mechanism can be assembled from a wheel, a connecting rod, a connecting shaft, and a bearing support; the crank rocker slider mechanism can be assembled from a connecting rod, a slider, a connecting shaft, a bearing support, and a support guide rail; and the Malta sheave mechanism can be assembled from a main sheave, a slave sheave, a connecting shaft, and a bearing support. In addition, other mechanical structures can also be assembled on the three-dimensional frame according to related parts.

[0044] The present invention is described in detail with reference to specific embodiments below.

[0045] Example 1

[0046] like Figure 3 As shown, an electrical box is installed at the end of the three-dimensional frame, a driving motor is installed on two short crossbeams in the middle of the chassis, a connecting shaft is set at the position of the three-dimensional frame above the left side of the driving motor, V-belt pulleys are respectively set on the driving motor and the connecting shaft, and two V-belt pulleys are connected by belts to form a belt transmission mechanism. Turn on the power switch of the electrical box and adjust the motor debugging knob to make the driving motor drive the belt transmission mechanism to operate. Another connecting shaft is installed at a suitable position of the three-dimensional frame, and a large spur gear and a small spur gear are respectively installed on the two connecting shafts to form an external gear mechanism. The external gear mechanism can operate together with the belt transmission mechanism. A bearing support is installed on the chassis crossbeam corresponding to the large spur gear. The bearing support is connected to one end of the rocker, and the other end of the rocker is connected to the large spur gear to form a swing guide rod mechanism. Specifically, a moving groove is set on the rocker, and a convex column for extending into the moving groove is set on the large spur gear. The swing guide rod mechanism can operate under the drive of the external gear mechanism.

[0047] Example 2

[0048] like Figure 4 As shown, a worm wheel and worm mechanism are installed on a three-dimensional frame above the driving motor through a bearing support, a small bevel gear is connected to the end of the worm, and a large bevel gear is fixed to the three-dimensional frame through a connecting shaft and meshes with the small bevel gear to form a bevel gear mechanism. At the same time, a V-belt pulley is installed on the connecting shaft where the large bevel gear is installed, and another V-belt pulley is installed coaxially with the output shaft of the driving motor. The two V-belt pulleys are connected by belts to form a new belt transmission mechanism.

[0049] Example 3

[0050] like Figure 5 As shown, the mechanical structures of Example 1 and Example 2 are connected through a belt transmission mechanism, and the driving motor is activated to drive the belt transmission mechanism of Example 1 and the belt transmission mechanism of Example 2 at the same time. The operation of the belt transmission mechanism of Example 2 can drive the operation of the bevel gear mechanism, and the operation of the bevel gear mechanism can drive the operation of the worm gear mechanism.

[0051] Example 4

[0052] like Figure 6 As shown, on the basis of the mechanical structure installed in Example 3, a wheel is installed coaxially with the large spur gear on the other side of the three-dimensional frame, and a support guide rail is installed at a suitable position of the three-dimensional frame, and two sliders are installed on the support guide rail to fix the rack. The end of the rack is connected to the wheel through a connecting rod. In addition, a small spur gear is fixed to the three-dimensional frame by a bearing support, so that the small spur gear and the rack are meshed with each other to form a gear rack mechanism. The operation of the external gear mechanism can drive the operation of the gear rack mechanism.

[0053] Example 5

[0054] like Figure 7 As shown, on the basis of the mechanical structure installed in Example 3, a wheel is installed coaxially with the small spur gear on the other side of the three-dimensional frame, and then a wheel is fixed on each side of the left and right sides at the same level as the wheel just installed by using a bearing support. The three wheels are on a horizontal line and connected together with a connecting rod to form a parallelogram mechanism, which can drive the parallelogram mechanism to operate together when the belt transmission mechanism is running.

[0055] Example 6

[0056] like Figure 8As shown, on the basis of the mechanical structure installed in Example 5, a support guide rail is vertically installed at an appropriate position of the three-dimensional frame, and a slider is installed on the support guide rail, and two bearing supports are also installed on the three-dimensional frame. Four connecting rods are connected together through a slider and two bearing supports, one end of a group of three connecting rods is coaxial, and one end of another group of two connecting rods is coaxial, thus forming a crank rocker slider mechanism. The crank rocker slider mechanism is connected to the parallelogram mechanism by a belt transmission mechanism, so when the parallelogram mechanism is running, the crank rocker slider mechanism will also run together.

[0057] Example 7

[0058] The mechanical structures installed in Example 4 and Example 5 are combined together to form a Fig. 9 The mechanical structure shown drives the motor to work, thereby driving the belt transmission mechanism, external gear mechanism, gear rack mechanism, parallelogram mechanism, swing guide rod mechanism, worm gear mechanism and conical gear mechanism arranged thereon to operate synchronously.

[0059] Example 8

[0060] The mechanical structures installed in Example 4 and Example 6 are combined together to form a Fig.10 The mechanical structure shown drives the motor to work, thereby driving the belt transmission mechanism, external gear mechanism, gear rack mechanism, parallelogram mechanism, swing guide rod mechanism, worm gear mechanism, conical gear mechanism and crank rocker slider mechanism arranged thereon to move synchronously.

[0061] Example 9

[0062] On the basis of Example 8, a main sheave and a slave sheave are installed on one side of the large spur gear installed on the three-dimensional frame with the aid of a bearing support, and the main sheave and the slave sheave are meshed with each other to form a Malta sheave mechanism, a V-belt pulley is installed coaxially with the main sheave, and a V-belt pulley is installed coaxially with the bearing support near the parallelogram mechanism in the crank, rocker and slider mechanism. The two V-belt pulleys are connected with a belt so that the crank, rocker and slider mechanism or the parallelogram mechanism can drive the Malta sheave mechanism to operate. Its plan view is as follows: Fig.11 As shown, the three-dimensional structure diagram is as follows Fig.12 shown.

[0063] The assembly schemes of the above embodiments can all constitute a complete linkage system. After the power switch is turned on, the driving motor can drive the entire three-dimensional space mechanism to operate. The above method is a relatively optimal assembly scheme. Using the simple assembly experimental device based on the three-dimensional space mechanism of the present invention, a variety of different three-dimensional space mechanisms can be assembled.

[0064] The present invention can carry out two types of experiments: one is to assemble according to the existing scheme to obtain a complete mechanical transmission mechanism to deepen the understanding of the mechanism composition; the other is to assemble according to imagination to obtain a new mechanical transmission or mechanism combination scheme and conduct practical training to achieve the purpose of mechanical innovation design.

[0065] The present invention can create a variety of assembly schemes by combining the provided parts with several mechanical structures. All parts are freely assembled using the principle of superposition and combination. A variety of different mechanisms can be assembled on a three-dimensional frame, which can fully cultivate students' creative thinking and practical skills, and deepen their understanding and recognition of the composition principles and movement characteristics of the mechanism.

[0066] In the present invention, the connection part between the connecting rods can be adjusted within a certain range, and the eccentricity of the slider can also be adjusted to a certain extent, so that the motion analysis of the mechanical transmission system can be carried out on the basis of mechanical assembly, and the influence of parameter changes on the movement of the mechanism and the trajectory, displacement, speed, acceleration, etc. of certain points on the mechanism can be analyzed.

[0067] Three-dimensional space mechanism is the main mechanism of many kinds of machinery and has a wide range of applications in mechanical engineering. Due to the limitations of the performance of a single mechanism, as well as the complexity and diversity of the mechanism's motion laws and motion forms, it is difficult to meet the requirements of mechanical innovation design by assembling only one of the mechanical structures. Usually, it is necessary to mutate or combine two or more mechanical structures to obtain new mechanical structures and combined mechanisms, so as to achieve a truly innovative mechanical design.

[0068] The components of the three-dimensional spatial mechanism of the present invention do not all move in the same plane or parallel planes. It has diverse movements, compact structure, flexibility and reliability. Some motion laws and spatial trajectory curves that are difficult to achieve with planar mechanisms can be achieved through spatial mechanisms. Therefore, spatial mechanisms are widely used in various working mechanisms and can fully meet the needs of teaching.

Claims

1. A simple assembly experimental device for teaching based on a three-dimensional space mechanism, characterized in that The assembled experimental device comprises a three-dimensional frame (1), a plurality of matching sets of mechanical structures, a drive motor (7) and an electrical box (3), wherein the mechanical structure, the drive motor (7) and the electrical box (3) are all detachably arranged on the three-dimensional frame (1), the drive motor (7) is electrically connected to the electrical box (3) for driving the mechanical structure to move, and a motor debugging button (28) and a power switch (29) are installed on a panel (27) of the electrical box (3), and the mechanical structure comprises one or a combination of more than one of a belt transmission mechanism, an external gear mechanism, a swing guide rod mechanism, a gear rack mechanism, a worm gear mechanism, a conical gear mechanism, a parallelogram mechanism, a crank rocker slider mechanism, and a Malta groove wheel mechanism, and each of the above mechanisms is directly or indirectly driven by the drive motor; The belt transmission mechanism is composed of a V-belt pulley (8), a belt (10), and a connecting shaft (15), wherein the V-belt pulley (8) is sleeved on the connecting shaft (15), and the V-belt pulleys (8) on different connecting shafts (15) are connected via the belt (10); The external gear mechanism is composed of a large spur gear (14), a small spur gear (12) and a connecting shaft (15), wherein the large spur gear (14) and the small spur gear (12) are meshed with each other, and the small spur gear (12) is connected to the V-belt pulley (8) via the connecting shaft (15); The swing guide rod mechanism is composed of a rocker (13), a large spur gear (14), and a bearing support (6), wherein the bearing support (6) is fixedly arranged on the three-dimensional frame (1), one end of the rocker (13) is connected to the bearing support (6), and the other end of the rocker (13) is connected to the large spur gear (14); The rack and pinion mechanism is composed of a small spur gear (12), a rack (20), a wheel (16), a connecting rod (17), a slider (21), a connecting shaft (15), a bearing support (6), and a support guide rail (2). The two ends of the support guide rail (2) are fixed on a column (22). Two sliders (21) are slidably arranged on the support guide rail (2). The lower ends of the sliders (21) are fixedly connected to the rack (20). One end of the rack (20) is connected to the wheel (16) through a connecting rod (17). The wheel (16) is coaxially connected to the large spur gear (14) through a connecting shaft (15). The small spur gear (12) is fixed to the crossbeam (23) through a bearing support (6) and meshes with the rack (20). The worm gear mechanism is assembled from a worm wheel (19), a worm (9), and a bearing support (6); the worm (9) is fixed to a short column via the bearing support (6); and the worm wheel (19) is adapted to the worm (9); The bevel gear mechanism is composed of a large bevel gear (11), a small bevel gear (18), and a connecting shaft (15), wherein the small bevel gear (18) is connected to one end of the worm (9), the large bevel gear (11) is fixed to the three-dimensional frame (1) through the connecting shaft (15), and the large bevel gear (11) is meshed with the small bevel gear (18); The parallelogram mechanism is composed of a wheel (16), a connecting rod (17), a connecting shaft (15), and a bearing support (6), wherein the wheel (16) is coaxially mounted with the small spur gear (12) via the connecting shaft (15), two wheels (16) are respectively mounted on the left and right sides at the same height as the wheel (16) via the bearing support (6), and the three wheels (16) are connected together via a connecting rod (17); The crank rocker slider mechanism is composed of a connecting rod (17), a slider (21), a connecting shaft (15), a bearing support (6), and a support guide rail (2), wherein the support guide rail (2) and the bearing support (6) are both mounted on a three-dimensional frame (1), the slider (21) is slidably arranged on the support guide rail (2), and four connecting rods (17) are connected together via one slider (21) and two bearing supports (6), wherein one end of three connecting rods (17) are coaxial and one end of two connecting rods (17) are coaxial; The Malta sheave mechanism is assembled from a main sheave (4), a slave sheave (5), a connecting shaft (15), and a bearing support (6); the main sheave is mounted on a three-dimensional frame via the connecting shaft and the bearing support; the slave sheave is mounted on the three-dimensional frame via the bearing support; the main sheave (4) and the slave sheave (5) are meshed with each other.

2. A simple assembly experimental device for teaching based on a three-dimensional space mechanism as claimed in claim 1, characterized in that The three-dimensional frame (1) comprises a bottom frame (24), a top frame (26) and a middle frame (25); the bottom frame (24) is assembled from a plurality of cross beams (23); the bottom frame (24) is the same length as the top frame (26); the bottom frame (24) is wider than the top frame (26); the top frame (26) is formed into a rectangular structure by four cross beams (23); the middle frame (25) is connected to the bottom frame (24) and the top frame (26) by a plurality of groups of symmetrically arranged columns (22); and the three-dimensional frame (1) is also provided with a plurality of detachable short columns and short cross beams for supporting a mechanical structure.

3. A simple assembly experimental device for teaching based on a three-dimensional space mechanism as claimed in claim 1, characterized in that The drive motor (7) has a maximum torque of 16.9 Nm, a maximum speed of 18 r / min, a voltage of AC 220 V 50 Hz, and a power of 0.9 KW.

4. A simple assembly experimental device for teaching based on a three-dimensional space mechanism as claimed in claim 1, characterized in that The rocker (13) is provided with a moving groove, and the large spur gear (14) is provided with a protruding column for extending into the moving groove.

5. A simple assembly experimental device for teaching based on a three-dimensional space mechanism as claimed in claim 1, characterized in that Each component involved in the mechanical structure is provided with one or more.

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