Bevel gear transmission reversing mechanism

Abstract

The utility model relates to the technical field of transmission units, in particular to a bevel gear transmission reversing mechanism which comprises a driving unit serving as a power source, the driving unit is in transmission connection with a power reversing unit through a chain, the power reversing unit is used for changing the transmission direction, and one side of the power reversing unit is connected with a self-locking lifting unit. A tensioning unit used for improving the transmission stability of the chain is further arranged on one side of the chain. The tensioning unit comprises a mounting plate, an elastic tensioning assembly is arranged on the inner side of the mounting plate, a rotating shaft is rotationally connected to the elastic tensioning assembly, and a tensioning wheel connected to the inner side of the chain in a pressing mode is fixedly arranged on the rotating shaft; according to the bevel gear transmission reversing mechanism, under the action of the adjusting nut, the compression degree of the spring is changed by moving the adjusting screw rod, so that the tensioning force applied to the chain by the tensioning wheel is adjusted, and under the action of the ejector rod and the switch, once the chain is broken or falls off, the ejector rod can directly abut against the switch, so that the problem can be quickly found, and the safety is improved. The maintenance is convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of transmission units, in particular to a bevel gear transmission reversing mechanism. Background Art

[0002] For a transmission mechanism using chains and sprockets as transmission components, the smooth connection between the chain and the sprocket is related to the stability of the transmission. In order to make the chain transmission stable, a tensioning mechanism needs to be installed to ensure that the chain remains taut during transmission. However, it is difficult to adjust the tension of the chain in the existing transmission mechanism. Too tight or too loose tension of the chain will affect the chain transmission, making it inconvenient to use, and it is difficult to quickly detect chain breakage or detachment. Utility Model Content

[0003] In view of the deficiencies of the prior art, the utility model provides a bevel gear transmission reversing mechanism, which solves the technical problem that the tensioning force of the chain is difficult to adjust in the prior transmission mechanism.

[0004] In order to solve the above technical problems, the utility model provides the following technical solutions: a bevel gear transmission reversing mechanism, comprising a driving unit as a power source, the driving unit is connected to a power reversing unit for changing the transmission direction through a chain transmission, one side of the power reversing unit is connected to a self-locking lifting unit, and one side of the chain is also provided with a tensioning unit for improving the stability of the chain transmission;

[0005] The tensioning unit comprises a mounting plate, an elastic tensioning assembly is arranged on the inner side of the mounting plate, a rotating shaft is rotatably connected to the elastic tensioning assembly, and a tensioning wheel which is pressed on the inner side of the chain is fixed on the rotating shaft.

[0006] Preferably, the elastic tensioning assembly includes a fixed block fixed to the inner side of the mounting plate, an adjusting screw is sleeved on the fixed block, a sliding sleeve and a spring are sleeved on the outer wall of the adjusting screw, the spring is located below the sliding sleeve, the sliding sleeve is embedded in the movable block, the movable block is slidably arranged on one side of the mounting plate and is rotatably connected to the rotating shaft, and an adjusting nut is threadedly connected to the top of the adjusting screw.

[0007] Preferably, a push rod is fixedly provided on the side wall of the movable block, and a switch installed at the bottom of the fixed block is provided just above the push rod.

[0008] Preferably, the driving unit comprises a servo motor and a planetary reducer connected to a power output end of the servo motor, and a sprocket connected to a chain is fixedly disposed on the power output end of the planetary reducer.

[0009] Preferably, the power reversing unit includes a sprocket two connected to the chain, sprocket two is fixedly connected to the reversing shaft, the reversing shaft is rotatably connected between two bearing seats one, a bevel gear one is also fixedly provided on the reversing shaft, bevel gear one is meshed with bevel gear two, a spur gear one is fixedly provided at the bottom of the bevel gear, one side of spur gear one is meshed with spur gear three through spur gear two, and spur gear one and spur gear two are both rotatably connected to the support plate.

[0010] Preferably, the self-locking lifting unit includes a trapezoidal lead screw, the bottom end of the trapezoidal lead screw is fixedly connected to the spur gear three, the trapezoidal lead screw is rotatably connected between the two bearing seats two, the two bearing seats two are fixedly connected to the side walls of the fixed side plate, the outer wall of the trapezoidal lead screw is spirally connected with a thread sleeve, the outer wall of the thread sleeve is fixedly provided with a connecting block, and the connecting block is fixedly connected to one side of the bottom of the lifting seat.

[0011] Preferably, two symmetrically arranged slide rails are fixedly arranged on the side wall of the lifting seat, and two sliders are respectively slidably arranged on the two sliders, and the two sliders are fixedly connected to the side wall of the fixed side plate.

[0012] By means of the above technical solution, the utility model provides a bevel gear transmission reversing mechanism, which has at least the following beneficial effects:

[0013] 1. The bevel gear transmission reversing mechanism is provided with a tensioning unit. Under the action of the adjusting nut, the compression degree of the spring is changed by moving the adjusting screw, thereby adjusting the tensioning force applied by the tensioning wheel to the chain. Under the action of the push rod and the switch, once the chain breaks or falls off, the push rod will directly contact the switch, so that the problem can be quickly discovered and maintenance is convenient.

[0014] 2. The bevel gear transmission reversing mechanism can change the transmission direction in a limited space by setting a power reversing unit, so that there is a more convenient installation space between the driving unit and the self-locking lifting unit. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The accompanying drawings described herein are used to provide a further understanding of the present invention and constitute a part of this application:

[0016] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the utility model;

[0017] Figure 2 It is a schematic diagram of the structure between the power reversing unit and the self-locking lifting unit of the utility model;

[0018] Figure 3 It is a schematic diagram of the structure between the fixed side plate and the lifting seat of the utility model;

[0019] Figure 4 It is a structural schematic diagram of the tensioning unit of the utility model.

[0020] Reference numerals:

[0021] 1. Drive unit; 11. Servo motor; 12. Planetary reducer; 13. Sprocket 1; 2. Chain; 3. Power reversing unit; 31. Sprocket 2; 32. Reversing shaft; 33. Bearing seat 1; 34. Bevel gear 1; 35. Bevel gear 2; 36. Spur gear 1; 37. Spur gear 2; 38. Spur gear 3; 39. Support plate; 4. Self-locking lifting unit; 41. Trapezoidal screw; 42. Bearing seat 2; 43. Fixed side plate; 44. Screw sleeve; 45. Connecting block; 46. Lifting seat; 47. Slide rail; 48. Slider; 5. Tensioning unit; 51. Mounting plate; 52. Fixed block; 53. Adjusting screw; 54. Sliding sleeve; 55. Spring; 56. Movable block; 57. Rotating shaft; 58. Tensioning wheel; 59. Adjusting nut; 510. Push rod; 511. Switch. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] When the chain 2 is tensioned by the tensioning mechanism, excessive tensioning will cause serious wear of the chain 2, while a loose chain 2 will lead to unstable transmission. Therefore, the stability of the chain 2 transmission depends on the setting of the tensioning mechanism. The tensioning force of the chain 2 of the existing tensioning mechanism is difficult to adjust, so there will be certain problems when using it.

[0024] Embodiment 1:

[0025] Based on the technical defects of the existing technology that the chain 2 tension is difficult to adjust, resulting in poor transmission effect, please refer to Figure 1-Figure 4The bevel gear transmission reversing mechanism provided by the utility model changes the compression degree of the spring 55 by moving the adjusting screw 53, thereby adjusting the tensioning force applied by the tensioning wheel 58 to the chain 2. The mechanism includes a driving unit 1 as a power source, and the driving unit 1 provides power support for the operation of the entire mechanism. The driving unit 1 is connected to a power reversing unit 3 for changing the transmission direction through the chain 2. The setting of the power reversing unit 3 can turn the transmission direction within a limited space. A self-locking lifting unit 4 is connected to one side of the power reversing unit 3, and the self-locking lifting unit 4 can realize lifting and lowering movement. A tensioning unit 5 for improving the transmission stability of the chain 2 is also provided on one side of the chain 2; by setting the tensioning unit 5, the elastic force of the spring 55 is used to make the tensioning wheel 58 apply tensioning force to the chain 2, thereby ensuring that the chain 2 is in a tensioned state.

[0026] In order to ensure the stability of the transmission of the chain 2, a tensioning unit 5 is provided to apply a tensioning force to the chain 2. The tensioning unit 5 includes a mounting plate 51. An elastic tensioning assembly is provided on the inner side of the mounting plate 51. A rotating shaft 57 is rotatably connected to the elastic tensioning assembly. A tensioning wheel 58 is fixed on the rotating shaft 57 and is crimped to the inner side of the chain 2. The tensioning force applied to the tensioning wheel 58 by the elastic tensioning assembly is transmitted to the chain 2, so that the chain 2 reaches a tensioned state.

[0027] Specifically, in order to solve the problem that it is difficult to adjust the tensioning force of the chain 2 by the transmission mechanism in the prior art, an elastic tensioning component that can adjust the tensioning force is provided. The elastic tensioning component includes a fixed block 52 fixedly connected to the inner side of the mounting plate 51, and an adjusting screw 53 is sleeved on the fixed block 52. A sliding sleeve 54 and a spring 55 are sleeved on the outer wall of the adjusting screw 53. The spring 55 is located below the sliding sleeve 54. The sliding sleeve 54 is embedded in a movable block 56. The movable block 56 is slidably arranged on one side of the mounting plate 51 and is rotatably connected to the rotating shaft 57. An adjusting nut 59 is threadedly connected to the top of the adjusting screw 53. By utilizing the function of the adjusting nut 59, the compression degree of the spring 55 is changed by moving the adjusting screw 53, thereby adjusting the tensioning force applied to the chain 2 by the tensioning wheel 58.

[0028] Furthermore, in order to facilitate timely detection of whether the power transmission problem is caused by the breakage or falling off of the chain 2, a push rod 510 is fixed on the side wall of the movable block 56, and a switch 511 installed at the bottom of the fixed block 52 is provided directly above the push rod 510. After the chain 2 breaks or falls off, the spring 55 quickly pushes the movable block 56 to move, and the movable block 56 drives the push rod 510 to contact the switch 511, thereby sending a signal so that the fault situation can be quickly understood.

[0029] Furthermore, in order to solve the power problem of the entire mechanism, a driving unit 1 is set up, and the driving unit 1 includes a servo motor 11 and a planetary reducer 12 connected to the power output end of the servo motor 11, and a sprocket 13 connected to the chain 2 is fixed on the power output end of the planetary reducer 12; the servo motor 11 is used to drive the sprocket 13 to move through the planetary reducer 12, thereby realizing power output.

[0030] Furthermore, in order to facilitate the transmission of the power of the driving unit 1 to the self-locking lifting unit 4, a power reversing unit 3 is arranged between the two, so as to change the transmission direction and facilitate the driving of the self-locking lifting unit 4 to operate, and the power reversing unit 3 includes a sprocket 2 31 connected to the chain 2, the sprocket 2 31 is fixedly connected to the reversing shaft 32, the reversing shaft 32 is rotatably connected between two bearing seats 1 33, and a bevel gear 1 34 is fixedly arranged on the reversing shaft 32, the bevel gear 1 34 is meshed with the bevel gear 2 35, and the bottom of the bevel gear is fixedly arranged Spur gear one 36, one side of spur gear one 36 is meshed with spur gear three 38 through spur gear two 37, and spur gear one 36 and spur gear two 37 are both rotatably connected to the support plate 39; the chain 2 is used to drive the sprocket two 31 to move, the sprocket two 31 drives the bevel gear one 34 to rotate through the reversing shaft 32, and the bevel gear one 34 drives the spur gear one 36 to rotate through the meshing action with the bevel gear two 35, and under the meshing action of the spur gear one 36, the spur gear two 37 and the spur gear three 38, the steering and transmission of power are realized.

[0031] According to the embodiment, the servo motor 11 drives the sprocket 13 to move through the planetary reducer 12, and under the action of the chain 2, the sprocket 2 31 is driven to move, and the sprocket 2 31 drives the bevel gear 1 34 to rotate through the reversing shaft 32, and the bevel gear 1 34 drives the spur gear 1 36 to rotate through the meshing action with the bevel gear 2 35, and under the meshing action of the spur gear 1 36, the spur gear 2 37 and the spur gear 3 38, the steering and transmission of power are realized.

[0032] Embodiment 2:

[0033] During the lifting process, if the power is lost, it is easy to cause the lifting position to change. To solve this problem, please refer to Figure 1-Figure 3 On the basis of the first embodiment, the self-locking lifting unit 4 includes a trapezoidal screw 41, the bottom end of the trapezoidal screw 41 is fixedly connected to the spur gear 38, the trapezoidal screw 41 is rotatably connected between the two bearing seats 42, the two bearing seats 42 are fixedly connected to the side walls of the fixed side plate 43, the outer wall of the trapezoidal screw 41 is spirally connected with a thread sleeve 44, the outer wall of the thread sleeve 44 is fixedly provided with a connecting block 45, and the connecting block 45 is fixedly connected to one side of the bottom of the lifting seat 46; the locking effect between the trapezoidal screw 41 and the thread sleeve 44 can be used to keep the position unchanged after lifting and lowering, thereby realizing self-locking.

[0034] According to the embodiment, the spur gear 38 can drive the trapezoidal screw 41 to rotate, and the trapezoidal screw 41 drives the lifting seat 46 to move up and down through the thread sleeve 44 to achieve the lifting operation.

[0035] Through the above embodiments, it can be known that the use process of the device is to use the servo motor 11 to drive the sprocket 13 to move through the planetary reducer 12, and under the action of the chain 2, the sprocket 2 31 is driven to move, and the sprocket 2 31 drives the bevel gear 1 34 to rotate through the reversing shaft 32, and the bevel gear 1 34 drives the spur gear 1 36 to rotate through the meshing action with the bevel gear 2 35, and under the meshing action of the spur gear 1 36, the spur gear 2 37 and the spur gear 3 38, the power is turned and transmitted, and the spur gear 3 38 can drive the trapezoidal screw 41 to rotate, and the trapezoidal screw 41 drives the lifting seat 46 to move up and down through the thread sleeve 44 to realize the lifting operation.

[0036] It should be noted that the terms "comprises", "includes" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or apparatus that includes a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or apparatus.

[0037] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A bevel gear transmission reversing mechanism, comprising a drive unit (1) as a power source, Features: The driving unit (1) is connected to a power reversing unit (3) for changing the transmission direction via a chain (2); one side of the power reversing unit (3) is connected to a self-locking lifting unit (4); and one side of the chain (2) is also provided with a tensioning unit (5) for improving the transmission stability of the chain (2); The tensioning unit (5) comprises a mounting plate (51), an elastic tensioning assembly is arranged on the inner side of the mounting plate (51), a rotating shaft (57) is rotatably connected to the elastic tensioning assembly, and a tensioning wheel (58) is fixedly arranged on the rotating shaft (57) and is pressed against the inner side of the chain (2); The power reversing unit (3) comprises a sprocket wheel 2 (31) connected to the chain (2), the sprocket wheel 2 (31) is fixedly connected to the reversing shaft (32), the reversing shaft (32) is rotatably connected between two bearing seats 1 (33), a bevel gear 1 (34) is also fixedly provided on the reversing shaft (32), the bevel gear 1 (34) is meshed with a bevel gear 2 (35), a spur gear 1 (36) is fixedly provided at the bottom of the bevel gear, one side of the spur gear 1 (36) is meshed with a spur gear 3 (38) through a spur gear 2 (37), and the spur gear 1 (36) and the spur gear 2 (37) are both rotatably connected to a support plate (39); The self-locking lifting unit (4) comprises a trapezoidal screw (41), the bottom end of which is fixedly connected to a spur gear (38), the trapezoidal screw (41) is rotatably connected between two bearing seats (42), the two bearing seats (42) are both fixedly connected to the side walls of a fixed side plate (43), a thread sleeve (44) is spirally connected to the outer wall of the trapezoidal screw (41), a connecting block (45) is fixedly provided on the outer wall of the thread sleeve (44), and the connecting block (45) is fixedly connected to one side of the bottom of a lifting seat (46).

2. The bevel gear transmission reversing mechanism according to claim 1, Features: The elastic tensioning assembly comprises a fixed block (52) fixedly connected to the inner side of the mounting plate (51), an adjusting screw (53) being sleeved on the fixed block (52), a sliding sleeve (54) and a spring (55) being sleeved on the outer wall of the adjusting screw (53), the spring (55) being located below the sliding sleeve (54), the sliding sleeve (54) being embedded in a movable block (56), the movable block (56) being slidably arranged on one side of the mounting plate (51) and being rotatably connected to a rotating shaft (57), and an adjusting nut (59) being threadedly connected to the top of the adjusting screw (53).

3. The bevel gear transmission reversing mechanism according to claim 2, Features: A push rod (510) is fixedly arranged on the side wall of the movable block (56), and a switch (511) installed on the bottom of the fixed block (52) is arranged just above the push rod (510).

4. The bevel gear transmission reversing mechanism according to claim 1, Features: The drive unit (1) comprises a servo motor (11) and a planetary reducer (12) connected to the power output end of the servo motor (11); a sprocket wheel (13) connected to the chain (2) is fixedly disposed on the power output end of the planetary reducer (12).

5. The bevel gear transmission reversing mechanism according to claim 1, Features: Two symmetrically arranged slide rails (47) are fixedly arranged on the side wall of the lifting seat (46), and two sliders (48) are respectively slidably arranged on the two sliders (48), and the two sliders (48) are fixedly connected to the side wall of the fixed side plate (43).

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