Single-drive double-acting chain mechanism

Abstract

The utility model relates to a single-drive double-acting chain mechanism which comprises a rotating shaft, a driving unit, a rotating arm, a rotating auxiliary arm and a chain unit, and the rotating arm is arranged between the rotating shaft and the driving unit. Rotating auxiliary arms are respectively arranged above and below the rotating arm in a sliding manner, and the two rotating auxiliary arms respectively extend out of two ends of the rotating arm; chain units used for driving the rotating auxiliary arm to stretch out and draw back are arranged on the upper portion and the lower portion of the rotating arm respectively, and each chain unit comprises a transmission chain and two elastic chain wheels supporting the transmission chain; the driving unit comprises a driving chain wheel and four pressing chain wheels which are controlled by a driving motor, the driving chain wheel is meshed between the two transmission chains, and the two pressing chain wheels located on the same horizontal plane are matched to press one transmission chain. According to the telescopic mechanism, two telescopic mechanisms which move relatively can be installed in a small space and are installed in the same plane, and normal stretching and retracting of the mechanism can be achieved only through a single driving unit.

Description

Technical Field

[0001] The utility model relates to the technical field of mechanical transmission, in particular to a single-drive double-acting chain mechanism. Background Art

[0002] Mechanical equipment usually consists of a control mechanism, a driving mechanism, a transmission mechanism and an execution mechanism. In some specific working scenarios, it is necessary to install two symmetrical execution mechanisms in a narrow space, and it is required that the execution mechanisms can expand and contract absolutely symmetrically. Therefore, there are relatively high requirements for the design of the driving and transmission mechanisms.

[0003] For example, an automatic spraying mechanism of a large round tube internal spraying machine applied by our unit. The main column lifting mechanism can drive the rotating mechanism to move up and down, and the rotating mechanism can rotate relative to the spraying vehicle. The rotating mechanism is driven by a second motor to rotate the rotating arm. There are rotating sub-arms at both ends of the rotating arm, and the rotating sub-arms can expand and contract relative to the rotating arm, thereby driving the spray gun at the end of the rotating sub-arm to move. The purpose of the expansion and contraction of the rotating sub-arm is to adjust the position of the nozzle, adapt to round tubes with different diameters, and adjust the spraying distance. After the centers of the rotating arm and the round tube coincide, the rotation of the rotating arm can drive the spray gun to rotate and spray the inner surface of the round tube comprehensively and evenly, as Figure 1 and Figure 2 shown.

[0004] Based on the above, it is necessary to consider arranging two telescopic mechanisms moving relatively in the round tube to drive the two rotating sub-arms to expand and contract absolutely symmetrically, while saving space, reducing its own weight, reducing the moving weight, so as to avoid the problems of clumsy movement and inflexibility of the whole machine during movement and rotation.

[0005] However, in the existing transmission technology, it is mostly the motor plus the chain to drive the expansion and contraction of the rotating sub-arm. At most, a single motor drives two points through the chain drive to make them rotate synchronously. When there are multiple transmission parts, it is mostly the synchronous motors that are controlled separately. The motor frequency is adjusted to make them synchronous, and then multiple points are driven to rotate synchronously. Therefore, two sets of motor plus chain telescopic structures need to be configured for the two rotating sub-arms. This technology has a high difficulty in adjusting synchronization, is difficult to maintain, occupies a large space, and increases the weight of the equipment itself and the moving weight. Summary of the Invention

[0006] In order to solve the problems of large difficulty in synchronous control of the mechanism requiring absolute symmetric expansion and contraction, complex structure, large and bulky and inflexible, the utility model provides a single-drive double-acting chain mechanism, which adopts a single driving mechanism to cooperate with two upper and lower chains to realize the synchronous drive of the two chains, thereby driving the rotating sub-arms to expand and contract absolutely symmetrically, saving space, and reducing its own weight and the moving weight.

[0007] To achieve the above object, the technical solution adopted by the utility model is:

[0008] A single-drive double-acting chain mechanism for the absolute symmetric telescopic control of two rotating sub-arms, comprising a rotating shaft, a driving unit, a rotating arm, a rotating sub-arm and a chain unit. The rotating shaft and the driving unit are arranged opposite to each other at intervals front and back. The rotating arm is arranged between the rotating shaft and the driving unit, which is equivalent to clamping the rotating arm front and back by the rotating shaft and the driving unit to realize the installation and fixation of the three components.

[0009] The rotating arm is perpendicular to the axial direction of the rotating shaft. The rotating arm has an upper and lower symmetric structure and is hollow up and down, which is convenient for arranging components inside it. The rotating sub-arms are respectively slidably arranged on the upper and lower parts of the rotating arm. The rotating sub-arms are located in two different upper and lower spaces. The two rotating sub-arms respectively extend out from both ends of the rotating arm and the extending directions are opposite, which is convenient for the symmetric telescopic movement of the rotating sub-arms.

[0010] The chain units for driving the telescopic movement of the rotating sub-arms are respectively arranged on the upper and lower parts of the rotating arm. The chain unit includes a transmission chain wound into a circular ring and two tensioning sprockets for supporting the transmission chain. The two tensioning sprockets are arranged at the two end parts of the rotating arm in a left-right adjustable manner, which is convenient for adjusting the tension of the transmission chain.

[0011] The driving unit includes a driving sprocket and a pressing sprocket controlled by a driving motor. The driving sprocket extends to the middle part of the rotating arm and meshes between the two transmission chains, which is convenient for realizing the synchronous operation of the two transmission chains. The number of the pressing sprockets is four and they are arranged in a rectangular shape around the driving sprocket. The pressing sprockets are arranged on the rotating arm in an up-down adjustable manner. The left and right two pressing sprockets on the same horizontal plane cooperate to press a transmission chain to ensure the meshing state between the driving sprocket and the transmission chain.

[0012] Further, a front side plate is arranged at one end of the rotating shaft to connect with the middle part of the rotating arm. The driving unit further includes a rear side plate, and the rear side plate is connected with the middle part of the rotating arm. The front side plate and the rear side plate are used for welding installation with the rotating arm. The rotating arm includes an upper rotating arm and a lower rotating arm arranged symmetrically up and down. Both the upper rotating arm and the lower rotating arm are hollow long rod-shaped, and the upper rotating arm and the lower rotating arm are arranged symmetrically up and down between the front side plate and the rear side plate.

[0013] Further, the rotating sub-arm is a long rod body bent in an "L" shape. A slide rail-slider structure is arranged between each rotating sub-arm and the rotating arm for sliding connection, which improves the smoothness of the movement of the rotating sub-arm. The rotating sub-arm is connected with the transmission chain, which is convenient for driving the rotating sub-arm to move linearly.

[0014] Furthermore, chain units are provided inside both the upper rotating arm and the lower rotating arm. A rotating sub-arm is arranged inside the upper rotating arm, and another rotating sub-arm is arranged inside the lower rotating arm. After the rotating sub-arm inside the upper rotating arm extends leftward out of the upper rotating arm, it bends vertically. After the rotating sub-arm inside the lower rotating arm extends rightward out of the lower rotating arm, it bends vertically. The upper and lower rotating sub-arms are located in the same vertical plane.

[0015] Furthermore, the drive chain is arranged along the entire length of the rotating arm, and the tensioning sprockets are arranged at both ends of the drive chain;

[0016] An installation plate with a transverse hole is provided at the end of the rotating arm. The transverse holes are arranged along the length direction of the rotating arm. The tensioning sprocket is detachably arranged on the installation plate. The tensioning sprocket includes a transverse shaft, a transverse sprocket body, and a transverse locking nut. One end of the transverse shaft passes through the transverse hole and is connected with a transverse locking nut. The other end of the transverse shaft extends into the rotating arm and is rotatably connected with the transverse sprocket body. The transverse sprocket body meshes with the drive chain. After loosening the transverse locking nut, the transverse shaft can move left and right in the transverse hole, which is convenient for changing the position of the tensioning sprocket.

[0017] Furthermore, the drive motor is provided on the rear side plate, and a motor guard is also detachably provided on the rear side plate. The motor guard covers the drive motor inside, which is convenient for protecting the drive motor. Two vertical holes are respectively opened on the rear side plate on both the left and right sides of the drive motor. The four vertical holes are arranged in a rectangle. Each vertical hole is arranged along the height direction of the rotating arm. A pressing sprocket is arranged in each vertical hole. The pressing sprocket can move up and down in the vertical hole to adjust the pressing degree on the drive chain.

[0018] Furthermore, the drive sprocket is located between the upper rotating arm and the lower rotating arm. Two pressing sprockets are arranged inside the upper rotating arm, and two pressing sprockets are also arranged inside the lower rotating arm;

[0019] The pressing sprocket includes a vertical shaft, a vertical sprocket body, and a vertical locking nut. One end of the vertical shaft passes through the vertical hole and is connected with a vertical locking nut. The other end of the vertical shaft extends into the rotating arm and is rotatably connected with the vertical sprocket body. The vertical sprocket body meshes with the drive chain. The pressing sprocket and the tensioning sprocket have the same structure.

[0020] Through the above technical solutions, the beneficial effects of the present utility model are:

[0021] The structure of the utility model is reasonably designed. An upper rotating arm and a lower rotating arm are symmetrically arranged up and down. Inside the upper rotating arm and the lower rotating arm, a rotating sub-arm is slidably arranged through a slide rail and slider structure. The sliding directions of the two rotating sub-arms are opposite, thereby realizing a symmetric telescopic motion relative to the rotating arm. At the same time, a chain unit is arranged inside both the upper rotating arm and the lower rotating arm. The chain unit is connected to the corresponding rotating sub-arm. A driving unit is arranged between the upper rotating arm and the lower rotating arm. The driving sprocket controlled by a driving motor meshes with the two chain units, realizing that a single drive can drive the two transmission chains to operate, so as to realize the relative motion of the two rotating sub-arms.

[0022] The driving sprocket of the utility model meshes with two transmission chains at the same time. Two pressing sprockets are used to ensure the meshing of the driving sprocket and one transmission chain. The position of the pressing sprocket is adjustable up and down, thereby changing the pressing degree on the transmission chain. Both ends of the transmission chain are supported by the tensioning sprockets. The position of the tensioning sprockets is adjustable left and right, thereby changing the tension of the transmission chain.

[0023] The utility model installs two telescopic mechanisms with relative motion in a relatively small space and installs them in the same plane, and uses a single driving unit to realize the normal telescopic motion of the mechanism. In short, by arranging two parallel chains up and down on the same vertical plane, and eight sprocket positions are adjustable. A set of driving units is arranged at the central position. The middle four sprockets are used to adjust the distance between the two chains and the driving sprocket, and the other four sprockets at both ends adjust the tension of the chains. When the driving unit operates, the eight sprockets rotate synchronously, thereby enabling the two telescopic mechanisms to perform synchronous telescopic motion.

[0024] The utility model solves the problem that the body is bulky and inflexible, which requires both absolute symmetric telescoping and the overall telescoping mechanism to rotate and move. It also maintains the overall kinetic energy balance during the overall rotational motion, overcomes the problems of the original mechanism being huge and bulky, the mechanism being complex, and the repeated maintenance being difficult. It can save space, reduce its own weight, reduce the moving weight, and adapt to narrow spaces and working conditions that require the relative balance and accuracy of the double-motion mechanism. Description of the Drawings

[0025] Figure 1 It is a schematic diagram of the extended state of the rotating sub-arm of the internal spraying machine.

[0026] Figure 2 It is a schematic diagram of the retracted state of the rotating sub-arm of the internal spraying machine.

[0027] Figure 3 It is an overall axonometric view of a single-drive double-action chain mechanism of the utility model.

[0028] Figure 4It is an axonometric view of the rotating sub-arm shaft of a single-drive double-acting chain mechanism of the present utility model. The arrow in the figure indicates the relative running direction of the rotating sub-arm.

[0029] Figure 5 It is an overall top view of a single-drive double-acting chain mechanism of the present utility model.

[0030] Figure 6 It is an overall side view of a single-drive double-acting chain mechanism of the present utility model.

[0031] Figure 7 It is a front view of the connection between the chain unit and the drive unit of a single-drive double-acting chain mechanism of the present utility model.

[0032] Figure 8 It is a Figure 7 simple schematic diagram of a single-drive double-acting chain mechanism of the present utility model.

[0033] Figure 9 It is an axonometric view of the installation of the tensioning and slack sprockets of a single-drive double-acting chain mechanism of the present utility model.

[0034] Figure 10 It is a schematic diagram of the tensioning and slack sprockets of a single-drive double-acting chain mechanism of the present utility model.

[0035] Figure 11 It is an axonometric view of the arrangement of the compression sprockets of a single-drive double-acting chain mechanism of the present utility model.

[0036] Figure 12 It is a sectional view of the rotating arm of a single-drive double-acting chain mechanism of the present utility model.

[0037] Figure 13 It is an axonometric view of the slide rail and slider structure of a single-drive double-acting chain mechanism of the present utility model.

[0038] Figure 14 It is a schematic diagram of the arrangement of the high-pressure pipes of a single-drive double-acting chain mechanism of the present utility model.

[0039] Figure 15 It is an axonometric view of the pulley trolley of a single-drive double-acting chain mechanism of the present utility model.

[0040] The reference numerals in the drawings are: 1 spraying vehicle, 2 main column lifting mechanism, 3 rotating arm, 4 rotating sub-arm, 5 spray gun, 6 rotating shaft, 7 driving unit, 71 driving motor, 72 driving sprocket, 73 pressing sprocket, 8 chain unit, 81 transmission chain, 82 tensioning sprocket, 9 front side plate, 10 rear side plate, 11 upper rotating arm, 12 lower rotating arm, 131 slide rail, 132 slider, 133 connecting plate, 14 transverse hole, 15 mounting plate, 161 transverse shaft, 162 transverse sprocket body, 163 transverse locking nut, 17 clamping plate, 18 motor cover, 19 vertical hole, 20 high-pressure pipe, 201 front fixed section, 202 movable section, 203 rear fixed section, 21 high-pressure track, 22 transverse bracket, 23 vertical bracket, 24 pulley trolley, 241 trolley board, 242 horizontal wheel, 243 vertical wheel, 244 limiting rod, 245 pipe clamp, 246 rotating seat, 247 stop block, 25 proximity switch. Detailed implementation manners

[0041] The following makes a detailed description of the specific implementation manners of the present utility model in conjunction with the drawings:

[0042] As Figures 1 to 15 shown, a single-drive double-acting chain mechanism is used for the absolute symmetric telescopic control of two rotating sub-arms 4, and includes a rotating shaft 6, a driving unit 7, a rotating arm 3, a rotating sub-arm 4 and a chain unit 8. The rotating shaft 6 and the driving unit 7 are arranged opposite to each other at intervals front and back. A rotating arm 3 is arranged between the rotating shaft 6 and the driving unit 7. Further, the rotating shaft 6, the rotating arm 3 and the driving unit 7 are connected and fixed together.

[0043] When the rotating arm 3 is fixed, a front side plate 9 is arranged at one end of the rotating shaft 6. The rotating shaft 6 is connected to the middle of the rotating arm 3 through the front side plate 9. The driving unit 7 includes a rear side plate 10. The driving unit 7 is connected to the middle of the rotating arm 3 through the rear side plate 10. The front side plate 9 and the rear side plate 10 have the same structure. The connection line between the front side plate 9 and the rear side plate 10 is perpendicular to the length direction of the rotating arm 3, that is, the rotating arm 3 is perpendicular to the axial direction of the rotating shaft 6, as Figure 3 、 Figure 5 and Figure 6 shown.

[0044] The rotating arm 3 has an upper and lower symmetric structure. Specifically, the rotating arm 3 includes an upper rotating arm 11 and a lower rotating arm 12 which are symmetrically arranged up and down. The rotating arm 3 is hollow up and down, that is, both the upper rotating arm 11 and the lower rotating arm 12 are hollow long rod-shaped. The upper rotating arm 11 and the lower rotating arm 12 are symmetrically arranged up and down between the front side plate 9 and the rear side plate 10. The cross sections of the upper rotating arm 11 and the lower rotating arm 12 are approximately "C" shaped. The upper end of the upper rotating arm 11 contracts inward, and the lower end of the lower rotating arm 12 also contracts inward. The upper end surface of the upper rotating arm 11 and the lower end surface of the lower rotating arm 12 are both open.

[0045] The rotating arm 3 is respectively provided with a rotating sub-arm 4 which slides up and down. The rotating sub-arms 4 are arranged in the upper and lower spaces of the rotating arm 3, that is, one rotating sub-arm 4 is arranged in the upper rotating arm 11 and another rotating sub-arm 4 is arranged in the lower rotating arm 12, as Figure 4 shown. The rotating sub-arm 4 is a long rod body bent in an "L" shape. A slide rail-slider structure is provided between each rotating sub-arm 4 and the rotating arm 3 for sliding connection, that is, the rotating sub-arm 4 can slide relative to the rotating arm 3, and the sliding directions of the two rotating sub-arms 4 are opposite, thereby realizing the telescoping of the rotating sub-arm 4 relative to the rotating arm 3.

[0046] When the rotating sub-arm 4 is installed, the above-mentioned slide rail-slider structure is adopted, that is, the slide rail-slider structures are arranged in both the upper rotating arm 11 and the lower rotating arm 12. The slide rail-slider structure includes a slide rail 131, a slider 132 and a connecting plate 133, as Figure 13 shown. Taking the installation of the rotating sub-arm 4 in the upper rotating arm 11 as an example: the slide rail 131 is arranged in the upper rotating arm 11, and the slide rail 131 is arranged along the entire length of the upper rotating arm 11. The slider 132 is slidably connected to the slide rail 131. The number of sliders 132 is two, and both are installed on the connecting plate 133. The connecting plate 133 is arranged at the end of the rotating sub-arm 4, so that the rotating sub-arm 4 can slide freely in the upper rotating arm 11. Similarly, a rotating sub-arm 4 can also slide freely in the lower rotating arm 12 through the slide rail-slider structure.

[0047] The two rotating sub-arms 4 respectively extend out of both ends of the rotating arm 3 and the extending directions are opposite, that is, the rotating sub-arm 4 in the upper rotating arm 11 extends out of the upper rotating arm 11 to the left and then bends vertically. The left end of the upper rotating arm 11 is open for the rotating sub-arm 4 to extend out. A proximity switch 25 is arranged at the right end of the upper rotating arm 11 for monitoring the movement of the rotating sub-arm 4. The rotating sub-arm 4 in the lower rotating arm 12 extends out of the lower rotating arm 12 to the right and then bends vertically. The left end of the lower rotating arm 12 is closed, and the right end of the lower rotating arm 12 is open for the rotating sub-arm 4 to extend out. The upper and lower two rotating sub-arms 4 are located in the same vertical plane but on horizontal planes at different heights, which means that the two rotating sub-arms 4 are respectively installed in the upper and lower upper rotating arms 11 and lower rotating arms 12, so that the two rotating sub-arms 4 are not in the same height plane.

[0048] Chain units 8 for driving the telescoping of the rotating sub-arm 4 are respectively arranged on the upper and lower parts of the rotating arm 3, that is, the chain units 8 are arranged in both the upper rotating arm 11 and the lower rotating arm 12. The rotating sub-arm 4 is connected to the transmission chain 81. On the basis that the rotating sub-arm 4 slides up and down on the rotating arm 3 and the chain units 8 are also arranged on the upper and lower parts of the rotating arm 3, the corresponding rotating sub-arm 4 and the chain unit 8 are connected, and the chain unit 8 drives the rotating sub-arm 4 to slide.

[0049] The chain unit 8 includes a drive chain 81 wound into an annular shape and two tension sprockets 82 for supporting the drive chain 81, as Figure 7 and Figure 8 shown. The drive chain 81 is arranged along the entire length of the rotating arm 3. The two ends of the drive chain 81 are provided with tension sprockets 82, and the tension sprockets 82 are used to adjust the tension of the drive chain 81. The two tension sprockets 82 are arranged at both ends of the rotating arm 3 in a left-right adjustable manner. Furthermore, the installation positions of the tension sprockets 82 can move left and right at the ends of the rotating arm 3. That is, tension sprockets 82 are arranged at both ends of the upper rotating arm 11 and both ends of the lower rotating arm 12.

[0050] When the tension sprocket 82 is installed, an installation plate 15 with a transverse hole 14 is provided at the end of the rotating arm 3. The transverse holes 14 are arranged along the length direction of the rotating arm 3, and the tension sprocket 82 is detachably arranged on the installation plate 15, as Figure 9 shown. The tension sprocket 82 includes a transverse shaft 161, a transverse sprocket body 162, and a transverse locking nut 163. The transverse shaft 161 is a stepped shaft. One end of the transverse shaft 161 passes through the transverse hole 14 and is connected with the transverse locking nut 163. The other end of the transverse shaft 161 extends into the rotating arm 3 and is rotatably connected with the transverse sprocket body 162. The transverse sprocket body 162 meshes with the drive chain 81, as Figure 10 shown.

[0051] When the drive chain 81 is installed with the rotating sub-arm 4, the installation is achieved through a connecting plate 133. That is, a clamping plate 17 is provided on the connecting plate 133. The number of clamping plates 17 is two arranged at intervals up and down, and the ends of the clamping plates 17 are fixed to the connecting plate 133. The two clamping plates 17 clamp the drive chain 81, and a screw is provided between the two clamping plates 17, thereby connecting the drive chain 81 and the clamping plate 17. The drive chain 81 can be connected to the connecting plate 133 through the clamping plate 17, and finally the connection between the drive chain 81 and the rotating sub-arm 4 is achieved. After the drive chain 81 runs, it drives the connecting plate 133 to move. The connecting plate 133 linearly moves in the rotating arm 3 through a slide rail-slider structure, thereby driving the rotating sub-arm 4 to move together.

[0052] The drive of the chain unit 8 is controlled by the drive unit 7. The drive unit 7 can drive the drive chain 81 to run. The drive unit 7 further includes a drive sprocket 72 and a pressing sprocket 73 controlled by a drive motor 71. The drive motor 71 is provided on the rear side plate 10, and a motor guard 18 is also detachably provided on the rear side plate 10. The motor guard 18 covers the drive motor 71 and can protect the drive motor 71.

[0053] A driving sprocket 72 is provided on the output shaft of the driving motor 71, which can drive the driving sprocket 72 to rotate. The driving sprocket 72 extends to the middle of the rotating arm 3 and is engaged between two transmission chains 81. Specifically, the driving sprocket 72 is located between the upper rotating arm 11 and the lower rotating arm 12, and is engaged with the transmission chain 81 in the upper rotating arm 11 and the transmission chain 81 in the lower rotating arm 12. The driving sprocket 72 can drive the two transmission chains 81 to operate.

[0054] The pressing sprockets 73 are used to ensure the meshing state between the driving sprocket 72 and the transmission chains 81. The number of pressing sprockets 73 is four, and they are arranged in a rectangular shape around the driving sprocket 72. The pressing sprockets 73 are vertically adjustable on the rotating arm 3. Thus, the vertical position of the pressing sprockets 73 is adjustable. The left and right two pressing sprockets 73 on the same horizontal plane cooperate to press one transmission chain 81, as Figure 11 and Figure 12 shown.

[0055] Specifically, two vertical holes 19 are respectively opened on the rear side plates 10 on the left and right sides of the driving motor 71. The four vertical holes 19 are arranged in a rectangular shape, and each vertical hole 19 is arranged along the height direction of the rotating arm 3. Each vertical hole 19 is provided with a pressing sprocket 73. Two pressing sprockets 73 are arranged in the upper rotating arm 11, and these two pressing sprockets 73 press the transmission chain 81 in the upper rotating arm 11 downward. Two pressing sprockets 73 are also arranged in the lower rotating arm 12, and these two pressing sprockets 73 press the transmission chain 81 in the lower rotating arm 12 upward.

[0056] The pressing sprocket 73 includes a vertical shaft, a vertical sprocket body and a vertical locking nut. One end of the vertical shaft passes through the vertical hole 19 and is connected with the vertical locking nut, and the other end of the vertical shaft extends into the rotating arm 3 and is rotatably connected with the vertical sprocket body, and the vertical sprocket body meshes with the transmission chain 81. The structures of the pressing sprocket 73 and the tensioning sprocket 82 are the same, and will not be elaborated here.

[0057] The principle of the present utility model is as follows: The upper rotating arm 11 and the lower rotating arm 12 are symmetrically installed up and down between the rotating shaft 6 and the driving unit 7. The chain unit 8, the slide rail slider structure and the rotating sub-arm 4 are all installed in the upper rotating arm 11 and the lower rotating arm 12. The rotating sub-arm 4 realizes relative sliding depending on the slide rail slider structure. The chain unit 8 is connected with the rotating sub-arm 4. The driving unit 7 simultaneously meshes with the two chain units 8 to drive the two transmission chains 81 to operate, so as to realize the telescopic operation of the two rotating sub-arms 4. After the driving motor 71 is started, it synchronously drives the two transmission chains 81 to run relatively through the driving sprocket 72. Each transmission chain 81 drives its respective rotating sub-arm 4 to move. The rotating sub-arm 4 moves smoothly under the action of the slide rail slider structure, and the two rotating sub-arms 4 can achieve absolute symmetric telescoping.

[0058] The utility model can realize the installation of two telescopic mechanisms moving relative to each other in a relatively small space and installed in the same plane, and adopt a single driving unit 7 to realize the normal operation of the mechanism, saving space, reducing its own weight and moving weight, overcoming the problems of the original mechanism being huge, heavy, complex in structure and difficult to repair repeatedly, and being particularly suitable for narrow spaces and requiring the relative balance and accuracy of the movement of the double movement mechanism.

[0059] In this embodiment, a single-drive double-action chain mechanism is proposed based on a large round tube internal spraying machine. Therefore, a single-drive double-action chain mechanism further includes a spray gun 5 and a high-pressure pipe 20 for conveying liquid. One end of each rotating sub-arm 4 is provided with a spray gun 5. When the rotating sub-arm 4 moves, it drives the spray gun 5 to move together. High-pressure pipes 20 are respectively arranged above and below the rotating arm 3, and the high-pressure pipes 20 correspond to the spray guns 5 one by one. The high-pressure pipe 20 is a flexible pipe, and the high-pressure pipe 20 can convey the liquid paint required for spraying to the spray gun 5. Both ends of each high-pressure pipe 20 are respectively connected to the spray gun 5 and the rotating shaft 6. The rotating shaft 6 is a hollow shaft body, and the paint is supplied to the spray gun 5 after passing through the rotating shaft 6 and the high-pressure pipe 20.

[0060] Since the spray gun 5 expands and contracts following the rotating sub-arm 4, the high-pressure pipe 20 must have sufficient length. In order to neatly and regularly arrange the high-pressure pipe 20 and avoid the scattering of the high-pressure pipe 20, here the high-pressure pipe 20 includes a front fixed section 201, a movable section 202 and a rear fixed section 203 which are integrally formed front and back. The front fixed section 201 and the rear fixed section 203 are both arranged in a straight line. The front fixed section 201 is connected to the rotating shaft 6, the rear fixed section 203 is connected to the spray gun 5, and the movable section 202 is arranged in a snake shape. The movable section 202 can move back and forth according to the expansion and contraction needs.

[0061] When the high-pressure pipe 20 is installed, high-pressure tracks 21 are symmetrically arranged above and below the rotating arm 3, that is, high-pressure tracks 21 are arranged on both the upper rotating arm 11 and the lower rotating arm 12. The high-pressure tracks 21 are arranged along the entire length of the rotating arm 3. The cross-section of the high-pressure track 21 is in the shape of a "mouth", and the upper plane, lower plane and both end planes of the high-pressure track 21 are open. Thus, the high-pressure track 21 and the rotating arm 3 are connected up and down, as Figure 14 shown.

[0062] On the outer wall at one end of the high-voltage track 21, three transverse brackets 22 are provided, and a front fixed section 201 is arranged between the three transverse brackets 22. The front fixed section 201 is stationary. A plurality of pulley trolleys 24 are slidably arranged inside one end of the high-voltage track 21, and a movable section 202 is arranged between the plurality of pulley trolleys 24. Thus, the movable section 202 can move. When the high-voltage pipe 20 is stretched, the distance between the pulley trolleys 24 becomes larger, and the movable section 202 is gradually unfolded. In the normal state, the high-voltage pipe 20 is serpentine. At this time, the distance between the pulley trolleys 24 becomes smaller, and the high-voltage pipe 20 is in a folded state. A plurality of vertical brackets 23 are provided on the rotary sub-arm 4. The vertical brackets 23 and the pulley trolleys 24 are arranged in a straight line. The vertical brackets 23 vertically extend outward from the rotary arm 3 and the high-voltage track 21, and a rear fixed section 203 is arranged between the plurality of vertical brackets 23. The position of the rear fixed section 203 moves following the rotary sub-arm 4, but the length of the rear fixed section 203 is constant.

[0063] The pulley trolley 24 includes a car body plate 241, horizontal wheels 242, vertical wheels 243, a limiting rod 244, a rotating seat 246 with a pipe clamp 245 disposed thereon, and a stop block 247, as Figure 15 shown. The car body plate 241 is a long strip plate, and the car body plate 241 is arranged along the length direction of the high-voltage track 21. Horizontal wheels 242 are rotatably arranged at the front and rear of the car body plate 241 respectively. The diameter of the horizontal wheels 242 is adapted to the width of the high-voltage track 21. Four vertical wheels 243 are symmetrically arranged on both sides of the middle of the car body plate 241. The diameter of the vertical wheels 243 is adapted to the height of the high-voltage track 21.

[0064] A limiting rod 244 is vertically arranged on the car body plate 241, and the limiting rod 244 extends upward out of the high-voltage track 21. A rotating seat 246 is rotatably arranged above the middle of the car body plate 241. The rotating seat 246 is a rectangular flat plate and is located outside the high-voltage track 21. Stop blocks 247 are arranged on two adjacent side surfaces of the rotating seat 246. The stop blocks 247 cooperate with the limiting rod 244 to limit the rotation angle of the rotating seat 246 within a range of 90°. The pulley trolley 24 uses the pipe clamp 245 to fix the movable section 202 of the high-voltage pipe 20.

[0065] The above-described embodiments are only the preferred embodiments of the present invention and do not limit the scope of implementation of the present invention. Therefore, all equivalent changes or modifications made according to the structure, features, and principles described in the scope of the present invention patent should be included within the scope of the patent application of the present invention.

Claims

1. A single-drive double-acting chain mechanism for absolutely symmetrical telescopic control of two rotating auxiliary arms (4), characterized in that: The device comprises a rotating shaft (6), a driving unit (7), a rotating arm (3), a rotating auxiliary arm (4), and a chain unit (8), wherein the rotating shaft (6) and the driving unit (7) are arranged relative to each other with a front-rear spacing, and the rotating arm (3) is arranged between the rotating shaft (6) and the driving unit (7); The rotating arm (3) is perpendicular to the axial direction of the rotating shaft (6); the rotating arm (3) is a vertically symmetrical structure; the rotating arm (3) is hollow at the top and bottom; the rotating auxiliary arms (4) are slidably arranged at the top and bottom of the rotating arm (3); the two rotating auxiliary arms (4) extend out from the two ends of the rotating arm (3) respectively, and the extending directions are opposite; The chain unit (8) for driving the retractable revolving auxiliary arm (4) is respectively arranged on the upper and lower parts of the revolving arm (3), the chain unit (8) comprising a transmission chain (81) wound in a circular ring shape and two elastic sprockets (82) for supporting the transmission chain (81), the two elastic sprockets (82) being adjustable leftward and rightward and arranged at the two ends of the revolving arm (3); The drive unit (7) comprises a drive sprocket (72) and a clamping sprocket (73) controlled by a drive motor (71); the drive sprocket (72) extends to the middle of the rotating arm (3) and meshes between two transmission chains (81); there are four clamping sprockets (73) arranged in a rectangular shape around the drive sprocket (72); the clamping sprocket (73) is adjustable up and down on the rotating arm (3); and the left and right clamping sprockets (73) located on the same horizontal plane cooperate to clamp a transmission chain (81).

2. A single-drive double-action chain mechanism according to claim 1, characterized in that: A front side plate (9) is provided at one end of the rotating shaft (6) to be connected to the middle of the rotating arm (3); the driving unit (7) further comprises a rear side plate (10); the rear side plate (10) is connected to the middle of the rotating arm (3); the rotating arm (3) comprises an upper rotating arm (11) and a lower rotating arm (12) which are symmetrically arranged up and down; the upper rotating arm (11) and the lower rotating arm (12) are both hollow long rods; the upper rotating arm (11) and the lower rotating arm (12) are symmetrically arranged up and down between the front side plate (9) and the rear side plate (10).

3. A single-drive double-action chain mechanism according to claim 1, characterized in that: The rotating auxiliary arm (4) is a long rod body bent into an "L" shape. A slide rail and slider structure is provided between each rotating auxiliary arm (4) and the rotating arm (3) for sliding connection. The rotating auxiliary arm (4) is connected to the transmission chain (81).

4. A single-drive double-action chain mechanism according to claim 2, characterized in that: The upper rotating arm (11) and the lower rotating arm (12) are both provided with a chain unit (8); a rotating auxiliary arm (4) is arranged in the upper rotating arm (11); another rotating auxiliary arm (4) is arranged in the lower rotating arm (12); the rotating auxiliary arm (4) in the upper rotating arm (11) extends leftward from the upper rotating arm (11) and then bends vertically; the rotating auxiliary arm (4) in the lower rotating arm (12) extends rightward from the lower rotating arm (12) and then bends vertically; the upper and lower rotating auxiliary arms (4) are located on the same vertical plane.

5. The single-drive double-action chain mechanism according to claim 1, characterized in that: The transmission chain (81) is arranged along the entire length of the rotating arm (3), and the tension sprockets (82) are arranged at both ends of the transmission chain (81); The end of the rotating arm (3) is provided with a mounting plate (15) with a transverse hole (14), the transverse hole (14) being arranged along the length direction of the rotating arm (3), the mounting plate (15) being detachably provided with the tension chain wheel (82), the tension chain wheel (82) comprising a transverse shaft (161), a transverse chain wheel body (162) and a transverse locking nut (163), one end of the transverse shaft (161) passing through the transverse hole (14) and being connected to the transverse locking nut (163), the other end of the transverse shaft (161) extending into the rotating arm (3) and being rotatably connected to the transverse chain wheel body (162), the transverse chain wheel body (162) being engaged with the transmission chain (81).

6. A single-drive double-action chain mechanism according to claim 2, characterized in that: The drive motor (71) is arranged on the rear side plate (10), and a motor shield (18) is also detachably arranged on the rear side plate (10), wherein the motor shield (18) covers the drive motor (71) therein, and two vertical holes (19) are respectively provided on the rear side plates (10) on the left and right sides of the drive motor (71), wherein the four vertical holes (19) are arranged in a rectangular shape, and each vertical hole (19) is arranged along the height direction of the rotating arm (3), and the clamping sprocket (73) is arranged in each vertical hole (19).

7. A single-drive double-action chain mechanism according to claim 6, characterized in that: The driving sprocket (72) is located between the upper rotating arm (11) and the lower rotating arm (12); two pressing sprockets (73) are arranged in the upper rotating arm (11); and two pressing sprockets (73) are also arranged in the lower rotating arm (12); The compression sprocket (73) comprises a vertical shaft, a vertical sprocket body and a vertical locking nut; one end of the vertical shaft passes through the vertical hole (19) and is connected to the vertical locking nut; the other end of the vertical shaft extends into the rotating arm (3) and is rotatably connected to the vertical sprocket body; the vertical sprocket body meshes with the transmission chain (81).

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