Stepless speed change transmission mechanism of automobile

Abstract

According to the technical scheme, the stepless speed change transmission mechanism is characterized in that the stepless speed change transmission mechanism comprises a first bottom plate; the device further comprises a second bottom plate arranged on one side of the first bottom plate, two bearing seats are vertically installed on the upper end face of the second bottom plate, ball bearing rings are assembled on the two bearing seats, transmission shafts are rotationally arranged in the two ball bearing rings, and a variable-diameter tensioning mechanism is assembled between the two transmission shafts. The transmission belt arranged outside the variable-diameter tensioning mechanism in a sleeving mode can be subjected to variable-diameter adjustment of the variable-diameter tensioning mechanism, and therefore tensioning is completed. Compared with tensioning wheels of different specifications used under traditional overhaul, the variable-diameter tensioning mechanism can automatically meet the tensioning requirements of different belts, tensioning wheel spare parts of different specifications do not need to be replaced in the overhaul and maintenance process, meanwhile, an operator can conveniently and rapidly adjust equipment, the maintenance shutdown time is shortened, and the maintenance efficiency is improved. And the cost expenditure caused by multi-specification spare part storage and frequent replacement is greatly reduced.

Description

Technical Field

[0001] This utility model relates to the field of automotive transmission components, and in particular to an automotive continuously variable transmission mechanism. Background Technology

[0002] A continuously variable transmission (CVT) is a transmission system that can smoothly change its gear ratio within a continuous range. As a highly efficient and smooth transmission system, the CVT plays an important role in the modern automotive industry. Through continuously changing gear ratios, it enables the engine to operate at its optimal state, improving fuel economy and driving comfort.

[0003] Traditional continuously variable transmissions (CVTs) are widely used in automobiles, achieving continuous changes in the transmission ratio through pulleys and a drive belt. However, this system has some significant drawbacks in terms of adjusting the pulley spacing and belt tension. Specifically, the pulley spacing in traditional automotive CVTs is difficult to adjust in a timely manner. Typically, a fixed-size pulley is used to tension the belt for inspection or maintenance. This requires selecting pulleys that are appropriately sized for the required tension, making accurate belt tensioning difficult during maintenance. Furthermore, ordinary repair shops lack spare pulleys of various sizes, limiting the convenience of repairs.

[0004] Therefore, a continuously variable transmission (CVT) mechanism for automobiles is provided to solve the above problems. Utility Model Content

[0005] In order to overcome the shortcomings of the existing technology, the purpose of this utility model is to provide a continuously variable transmission mechanism for automobiles, which can tighten belts with different tension requirements by setting a variable diameter tensioning mechanism, thereby simplifying the maintenance process and reducing maintenance costs.

[0006] The above-mentioned technical objective of this utility model is achieved through the following technical solution:

[0007] A continuously variable transmission (CVT) mechanism for automobiles includes a first base plate;

[0008] A geared motor is mounted on the upper surface of the first base plate, and a pulley is connected to the output end of the geared motor;

[0009] It also includes a second base plate disposed on one side of the first base plate. Two bearing seats are vertically mounted on the upper surface of the second base plate. Each of the two bearing seats is equipped with a ball bearing ring. A transmission shaft is rotatably disposed inside each of the two ball bearing rings. A variable diameter tensioning mechanism is assembled between the two sets of transmission shafts.

[0010] The variable diameter tensioning mechanism includes a first positioning plate fixedly mounted on one of the transmission shafts. The first positioning plate has several positioning posts mounted on its side and a tensioning plate connected to the several positioning posts. The tensioning plate has several sliding grooves along its center on its side, and a tensioning beam is slidably mounted in each of the sliding grooves.

[0011] Several tensioning beams are arranged in a circle around the center of the tensioning disc, and each tensioning beam is equipped with a tensioning inner plate at its end;

[0012] A transmission belt is provided to tension several of the inner tension plates together with the pulley.

[0013] Furthermore, the outer wall of the tensioning inner plate is arc-shaped and fits against the inner wall of the transmission belt.

[0014] Furthermore, a forward and reverse motor is installed on the side of the first positioning disk. The output end of the forward and reverse motor passes through the tensioning disk and extends to be connected to the first drive shaft. An adjusting gear is sleeved on the outer wall of the first drive shaft.

[0015] Furthermore, the adjusting gear has several variable diameter grooves extending through both sides, and a mandrel is slidably disposed in each variable diameter groove. Each mandrel corresponds to one of the tensioning beams and is mounted on the tensioning beam.

[0016] Furthermore, the tensioning disc has a hole on its side and a bearing is installed in the hole and a rotating shaft is rotatably connected to the bearing. A matching gear is sleeved on the outside of the rotating shaft and meshes with the tensioning disc.

[0017] Furthermore, a number of side posts are installed on the side of the tensioning disc, and a second positioning disc is installed on the side of the number of side posts. The second positioning disc is connected to a drive shaft that is away from the first positioning disc.

[0018] In summary, this utility model has the following beneficial effects:

[0019] By installing two sets of ball bearing rings with the variable diameter tensioning mechanism, the variable diameter tensioning mechanism can rotate. At the same time, through the variable diameter limit of the variable diameter tensioning mechanism, the transmission belt sleeved on the outside of the variable diameter tensioning mechanism can be adjusted by the variable diameter tensioning mechanism to complete the tensioning. Compared with the use of tensioning pulleys of different specifications in traditional maintenance, the variable diameter tensioning mechanism of this application can automatically adapt to different belt tensioning requirements, so that there is no need to replace tensioning pulleys of different specifications during maintenance. At the same time, it is convenient for operators to quickly adjust the equipment, shorten maintenance downtime, and significantly reduce the cost of stocking multiple specifications of spare parts and frequent replacement. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure in this embodiment;

[0021] Figure 2 This is a schematic diagram of the variable diameter tensioning mechanism and the transmission belt tensioning structure in this embodiment;

[0022] Figure 3 This is a schematic diagram of the overall installation structure of the variable diameter tensioning mechanism in this embodiment;

[0023] Figure 4 This is a schematic diagram of the mounting structure of the forward and reverse motor on the side of the tensioning plate in this embodiment.

[0024] In the diagram, 1. First base plate; 2. Gear motor; 3. Pulley; 4. Second base plate; 5. Bearing housing; 6. Ball bearing ring; 61. Drive shaft; 7. Variable diameter tensioning mechanism; 71. First positioning plate; 72. Positioning column; 73. Tensioning plate; 74. Slide groove; 75. Tensioning beam; 76. Tensioning inner plate; 77. Forward and reverse motor; 78. First drive shaft; 79. Adjusting gear; 710. Variable diameter groove; 711. Mandrel; 712. Rotating shaft; 713. Matching gear; 714. Side column; 715. Second positioning plate; 8. Drive belt. Detailed Implementation

[0025] The present invention will be further described in detail below with reference to the accompanying drawings.

[0026] Identical parts are indicated by the same reference numerals. It should be noted that the terms "front," "rear," "left," "right," "up," and "down" used in the following description refer to directions in the accompanying drawings, while the terms "bottom surface," "top surface," "inner," and "outer" refer to directions toward or away from the geometric center of a specific part, respectively.

[0027] First embodiment;

[0028] Reference Figure 1-4 As shown, this is a preferred embodiment of the continuously variable transmission mechanism for automobiles, including a first base plate 1;

[0029] A geared motor 2 is installed on the upper surface of the first base plate 1, and a pulley 3 is connected to the output end of the geared motor 2.

[0030] It also includes a second base plate 4 disposed on one side of the first base plate 1. Two bearing seats 5 are vertically installed on the upper end face of the second base plate 4. Each of the two bearing seats 5 is equipped with a ball bearing ring 6. A transmission shaft 61 is rotatably disposed inside each of the two ball bearing rings 6. A variable diameter tensioning mechanism 7 is assembled between the two sets of transmission shafts 61.

[0031] The variable diameter tensioning mechanism 7 includes a first positioning plate 71 fixedly mounted on one of the transmission shafts 61. The first positioning plate 71 has several positioning posts 72 mounted on its side and a tensioning plate 73 connected to it through the several positioning posts 72. The tensioning plate 73 has several sliding grooves 74 along its center on its side. A tensioning beam 75 is slidably mounted in each sliding groove 74.

[0032] Several tension beams 75 are arranged around the center of the tensioning disc 73, and each tension beam 75 is equipped with a tensioning inner plate 76 at its end.

[0033] A transmission belt 8 is provided to tension several tensioning inner plates 76 together with the pulley 3.

[0034] When the user needs to tighten the transmission belt 8 and perform maintenance and repair, one end of it is placed on the pulley 3, and then the second base plate 4 is moved to one side of the first base plate 1. At the same time, the other end of the transmission belt 8 is placed on the outside of several tensioning inner plates 76, thereby using the tensioning inner plates 76 to achieve tensioning limit on the other end of the transmission belt 8.

[0035] By installing two sets of ball bearing rings 6 with the variable diameter tensioning mechanism 7, the variable diameter tensioning mechanism 7 can rotate. At the same time, through the variable diameter limit of the variable diameter tensioning mechanism 7, the transmission belt 8 sleeved on the outside of the variable diameter tensioning mechanism 7 can be adjusted by the variable diameter tensioning mechanism 7 to complete the tensioning. Compared with the use of tensioning pulleys of different specifications in traditional maintenance, the variable diameter tensioning mechanism 7 of this application can automatically adapt to different belt tensioning requirements, so that there is no need to replace tensioning pulleys of different specifications during maintenance. At the same time, it is convenient for operators to quickly adjust the equipment, shorten maintenance downtime, and significantly reduce the cost of stocking multiple specifications of spare parts and frequent replacement.

[0036] Second embodiment;

[0037] Reference Figure 1-2 As shown, the outer wall of the tensioning inner plate 76 is arc-shaped and fits against the inner wall of the transmission belt 8. The plurality of tensioning inner plates 76 can be arranged in a ring around the center of the tensioning disc 73, thereby stretching the inner wall of the transmission belt 8. In a preferred embodiment, the tensioning inner plates 76 are made of rubber, which has good anti-slip properties and is easy to replace and maintain.

[0038] Third embodiment;

[0039] Reference Figure 1-3As shown, a forward and reverse motor 77 is mounted on the side of the first positioning plate 71. The output end of the forward and reverse motor 77 passes through the tensioning plate 73 and extends to be connected to the first drive shaft 78. An adjusting gear 79 is sleeved on the outer wall of the first drive shaft 78. The forward and reverse motor 77 can be used to drive the first drive shaft 78 to rotate in both directions. When the first drive shaft 78 rotates, the adjusting gear 79 connected to it can rotate accordingly.

[0040] Furthermore, the reversible motor 77 in this application is connected to a motor controller and a synchronizer, which can be used to control the number of rotations and the direction of rotation of the reversible motor 77. In use, the power connection method of the reversible motor 77 is existing technology, and the control circuit and synchronous rotation method can be implemented by those skilled in the art through simple programming, which is common knowledge in the field. Since it is only used without modification, the control method and circuit connection will not be described in detail.

[0041] Fourth embodiment;

[0042] Reference Figure 3 As shown, the adjusting gear 79 has several variable diameter grooves 710 extending through both sides. Each variable diameter groove 710 has a mandrel 711 slidably disposed in it. Each mandrel 711 corresponds to one of the tensioning beams 75 and is mounted on the tensioning beam 75.

[0043] When the adjusting gear 79 rotates, several first positioning discs 71 located outside the adjusting gear 79 can rotate accordingly. They are limited by the sliding groove 74 on the tension beam 75 and the connection between the spindle 711 and the end of the tension beam 75. At this time, the spindles 711 can slide in the variable diameter groove 710, while driving the tension beam 75 to move linearly along the stroke range of the sliding groove 74. The rotation number of the variable diameter groove 710 is controlled by the forward and reverse motor 77, so that the linear stroke of the tension beam 75 can be precisely controlled.

[0044] Fifth embodiment;

[0045] Reference Figure 1-4 As shown, the tensioning disc 73 has a hole on its side, and a bearing is installed in the hole and rotatably connected to the shaft 712 through the bearing. A mating gear 713 is sleeved on the outside of the shaft 712, and the mating gear 713 meshes with the tensioning disc 73. The mating gear 713 is provided to cooperate with the rotation of the tensioning disc 73, thereby making the rotation of the tensioning disc 73 more stable.

[0046] Sixth embodiment;

[0047] Reference Figure 1-4As shown, several side posts 714 are mounted on the side of the tensioning disc 73, and a second positioning disc 715 is mounted on the side of the several side posts 714. The second positioning disc 715 is connected to a drive shaft 61 located away from the first positioning disc 71. The side posts 714 are used to mount the second positioning disc 715, and the second positioning disc 715 is used to connect the ball bearing ring 6 and the variable diameter tensioning mechanism 7.

[0048] Specific implementation process:

[0049] Step 1: When the user needs to tighten the transmission belt 8 and perform maintenance and repair, one end of the belt is placed on the pulley 3, and then the second base plate 4 is moved to one side of the first base plate 1. At the same time, the other end of the transmission belt 8 is placed on the outside of several tensioning inner plates 76, thereby using the tensioning inner plates 76 to limit the other end of the transmission belt 8.

[0050] Step 2: The user connects the forward and reverse motor 77 to a power source, thereby driving the first transmission shaft 78 to rotate. When the first transmission shaft 78 rotates, the adjusting gear 79 sleeved on the outside of the first transmission shaft 78 can rotate accordingly. When the adjusting gear 79 rotates, several first positioning discs 71 opened on the outside of the adjusting gear 79 can rotate accordingly.

[0051] Step 3: Due to the sliding limit of the sliding groove 74 on the tension beam 75 and the connection between the spindle 711 and the end of the tension beam 75, the spindle 711 can slide in the variable diameter groove 710 at this time, and drive the tension beam 75 to move linearly along the stroke range of the sliding groove 74. At this time, the tension inner plate 76 connected to the end of the tension beam 75 can follow the linear movement. At the same time, through the rotation limit of the variable diameter groove 710, the tension inner plate 76 can open in a ring along the center of the tension plate 73 until the tension inner plate 76 supports the transmission belt 8 internally.

[0052] Step 4: After the tensioning inner plates 76 have completed supporting the transmission belt 8, the tensioning of the transmission belt 8 by the pulley 3 can achieve stable transmission of the transmission belt 8. Then the user can drive the output end of the geared motor 2 to run, thereby cooperating with the assembly between the two sets of ball bearing rings 6 and the variable diameter tensioning mechanism 7 to realize the transmission operation of the transmission belt 8.

[0053] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A continuously variable transmission (CVT) mechanism for automobiles, characterized in that: Including the first base plate (1); A geared motor (2) is installed on the upper surface of the first base plate (1), and a pulley (3) is connected to the output end of the geared motor (2); It also includes a second base plate (4) disposed on one side of the first base plate (1). Two bearing seats (5) are vertically installed on the upper surface of the second base plate (4). Each of the two bearing seats (5) is equipped with a ball bearing ring (6). A transmission shaft (61) is rotatably disposed inside each of the two ball bearing rings (6). A variable diameter tensioning mechanism (7) is assembled between the two sets of transmission shafts (61). The variable diameter tensioning mechanism (7) includes a first positioning plate (71) fixedly mounted on one of the transmission shafts (61). The first positioning plate (71) has several positioning posts (72) mounted on its side and a tensioning plate (73) connected to the several positioning posts (72). The tensioning plate (73) has several sliding grooves (74) opened along its center on its side. A tensioning beam (75) is slidably arranged in each of the sliding grooves (74). Several tension beams (75) are arranged around the center of the tensioning disc (73), and each tension beam (75) is provided with a tensioning inner plate (76) at its end; A transmission belt (8) is provided to tension the outer surfaces of several tensioning inner plates (76) together with the pulley (3).

2. The continuously variable transmission mechanism for automobiles according to claim 1, characterized in that: The outer wall of the tensioning inner plate (76) is arc-shaped and fits against the inner wall of the transmission belt (8).

3. The continuously variable transmission mechanism for automobiles according to claim 1, characterized in that: The first positioning disk (71) is equipped with a forward and reverse motor (77) on its side. The output end of the forward and reverse motor (77) passes through the tensioning disk (73) and extends to be connected to the first drive shaft (78). The outer wall of the first drive shaft (78) is fitted with an adjusting gear (79).

4. The continuously variable transmission mechanism for automobiles according to claim 3, characterized in that: The adjusting gear (79) has several variable diameter grooves (710) extending through both sides. Each variable diameter groove (710) has a mandrel (711) slidably disposed therein. Each mandrel (711) is respectively disposed corresponding to one of the tensioning beams (75) and the mandrel (711) is mounted on the tensioning beam (75).

5. The continuously variable transmission mechanism for automobiles according to claim 1, characterized in that: The tensioning disc (73) has a hole on its side and a bearing is installed in the hole. A rotating shaft (712) is rotatably connected to the bearing. A matching gear (713) is sleeved on the outside of the rotating shaft (712). The matching gear (713) meshes with the tensioning disc (73).

6. The continuously variable transmission mechanism for automobiles according to claim 1, characterized in that: The tensioning disc (73) has several side posts (714) mounted on its side, and the sides of the several side posts (714) are jointly mounted with a second positioning disc (715). The second positioning disc (715) is connected to a drive shaft (61) that is away from the first positioning disc (71).

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