Mechanical continuously variable transmission assembly

Abstract

The utility model discloses a mechanical continuously variable transmission assembly, which relates to the technical field of vehicle transmissions, and comprises a shell, a variable pump assembly and a constant displacement motor assembly, the variable pump assembly and the constant displacement motor assembly are respectively arranged at the end part of the shell and on the side surface of the shell in a mutually staggered manner; a regulator is mounted at one end, away from the constant displacement motor assembly, of the shell; the variable pump assembly comprises an input shaft movably connected with the side face of the shell, and a variable swash plate in transmission connection with the adjuster is arranged on the outer side of the input shaft. The variable swash plate is arranged on the inner side of the shell; the variable swash plate is driven by the swing plate to incline, the variable swash plate is matched with the first plunger and the first cylinder body, the volume in the oil cavity is changed, the gear ratio is controlled through hydraulic oil, the variable pump assembly and the constant displacement motor assembly are arranged in a staggered mode, the installation modes are increased, and vertical shaft input and horizontal shaft input can be achieved.

Description

Technical Field

[0001] The utility model specifically relates to the technical field of vehicle transmissions, and more specifically, to a mechanical continuously variable transmission assembly. Background Art

[0002] A continuously variable transmission is a transmission that can achieve continuous change of the transmission ratio. A continuously variable transmission consists of a driving cone pulley, a driven cone pulley, a steel belt, a hydraulic control system, etc. The wear of this type of transmission is relatively serious and it is not suitable for transmissions with large loads.

[0003] There is also a continuously variable transmission assembly that is usually mainly composed of a variable pump, a fixed-displacement motor, a control valve, and some connecting pipes. The variable pump is one of the key components of a hydrostatic transmission. It can change the magnitude and direction of the output flow rate. By adjusting the displacement of the pump, the control of the output flow rate is achieved, thereby adjusting the rotational speed and torque of the motor. The fixed-displacement motor converts hydraulic energy into mechanical energy and outputs the corresponding rotational speed and torque.

[0004] However, for this type of transmission, since the input shaft and the output shaft are mostly distributed on one side during use, the application scenarios are very limited and it cannot meet the scenarios of vertical shaft input and horizontal shaft input. Summary of the Utility Model

[0005] The purpose of the utility model is to provide a mechanical continuously variable transmission assembly. By staggering the distribution between the variable pump assembly and the fixed-displacement motor assembly, the installation methods of the transmission assembly can be increased, and the stretching spring pulls the swing plate to automatically rebound, improving the vehicle safety. To solve the technical problems proposed in the above background art.

[0006] To achieve the above purpose, the utility model provides the following technical solutions:

[0007] A mechanical continuously variable transmission assembly includes a housing, a variable pump assembly, and a fixed-displacement motor assembly. The variable pump assembly and the fixed-displacement motor assembly are respectively installed at the end and the side of the housing in an interleaved manner, and a regulator is installed at one end of the housing away from the fixed-displacement motor assembly.

[0008] The variable pump assembly includes an input shaft movably connected to the side of the housing, and a variable swash plate is arranged on the outer side of the input shaft and is in transmission connection with the regulator.

[0009] As a further technical solution of the utility model, the variable swash plate is arranged inside the housing, and a swing column movably connected to the housing is arranged on one side of the variable swash plate, and the swing column extends to one end outside the housing.

[0010] As a further technical solution of the present utility model, a thrust bearing is installed inside the variable swash plate, and one end of the first plunger away from the first cylinder body is attached to the side surface of the thrust bearing.

[0011] As a further technical solution of the present utility model, a first plunger and a first cylinder body which are matched with each other are respectively arranged on one side of the variable swash plate, and the first plunger and the first cylinder body are slidably connected inside.

[0012] As a further technical solution of the present utility model, the regulator includes a swing plate which is located outside the housing.

[0013] As a further technical solution of the present utility model, a cylindrical pin shaft and a tension spring are respectively arranged on one side of the swing plate away from the swing column, and the cylindrical pin shaft is located above the tension spring.

[0014] As a further technical solution of the present utility model, a rocker plate is further arranged on the side surface of the cylindrical pin shaft, and the end part of the rocker plate contacts the cylindrical pin shaft. The rocker plate is arranged in an L shape, and the end part of the rocker plate is fixedly connected with the part of the swing column located outside the housing; the swing plate is connected with the housing through a cylindrical fixing pin fixed on the housing.

[0015] As a further technical solution of the present utility model, a spring fixing plate which is hooked with the end part of the tension spring is further arranged at the end part of the housing, and the spring fixing plate is located on the side of the rocker plate away from the swing plate.

[0016] As a further technical solution of the present utility model, the end part of the input shaft penetrates through the inside of the first cylinder body, and the first cylinder body and the input shaft are in transmission connection through an involute spline.

[0017] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0018] In the present utility model, the variable swash plate is driven by the swing plate to tilt, and in cooperation with the first plunger and the first cylinder body, the volume in the oil chamber is changed, so as to realize the control of the transmission ratio by using hydraulic oil. Moreover, the variable pump assembly and the fixed-displacement motor assembly are arranged in a staggered manner, increasing the installation methods, and both vertical shaft input and horizontal shaft input are available;

[0019] In the present utility model, the spring fixing plate fixes the end part of the tension spring, so that the tension spring applies a pulling force to the lower part of the swing plate, realizing the automatic reset of the swing plate and improving the vehicle safety;

[0020] In the present utility model, through the inclined fixed-displacement swash plate, the transmission ratio of the stepless speed change can be increased. In cooperation with the adjustable variable pump assembly, the transmission efficiency is improved, the service life is prolonged, and the bidirectional stepless speed change output is realized. Description of the Drawings

[0021] Figure 1 This is a schematic structural diagram of the utility model in its operating state.

[0022] Figure 2 This is within the utility model Figure 1 Schematic diagram of the rear structure.

[0023] Figure 3 This is within the utility model Figure 1 Right view.

[0024] Figure 4 This is within the utility model Figure 1 Front view.

[0025] Figure 5 This is within the utility model Figure 4 Schematic diagram of a partial enlargement.

[0026] Figure 6 This is within the utility model Figure 4 Schematic diagram of a partial enlargement.

[0027] Figure 7 This is a schematic structural diagram of the variable pump assembly in the utility model.

[0028] Figure 8 This is a schematic structural diagram of the variable swash plate in the utility model.

[0029] In the figure:

[0030] Housing - 1, variable pump assembly - 2, input shaft - 21, variable swash plate - 22, first plunger - 23, first cylinder block - 24, swing column - 25, regulator - 3, swing plate - 31, cylindrical pin shaft - 32, tension spring - 33, rocker plate - 34, cylindrical fixing pin - 35, fixed - displacement motor assembly - 4, output shaft - 41, fixed - displacement swash plate - 42, second plunger - 43, second cylinder block - 44, spring fixing plate - 5. Detailed implementation manners

[0031] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present utility model.

[0032] Please refer to Figures 1-5, an embodiment of the present utility model provides a mechanical continuously variable transmission assembly, which includes a housing 1, a variable pump assembly 2 and a fixed-displacement motor assembly 4. The variable pump assembly 2 and the fixed-displacement motor assembly 4 are respectively installed at the end and the side of the housing 1 in an interlaced manner, and a regulator 3 is installed at one end of the housing 1 away from the fixed-displacement motor assembly 4;

[0033] The variable pump assembly 2 includes an input shaft 21 movably connected to the side of the housing 1, and a variable swash plate 22 is arranged on the outer side of the input shaft 21 and is in transmission connection with the regulator 3.

[0034] Please refer to Figures 5-8 , in this embodiment, the variable swash plate 22 is arranged inside the housing 1, and a swing column 25 movably connected to the housing 1 is arranged on one side of the variable swash plate 22, and the swing column 25 extends to one end outside the housing 1.

[0035] Specifically, a thrust bearing is installed inside the variable swash plate 22, and one end of the first plunger 23 away from the first cylinder block 24 is attached to the side of the thrust bearing.

[0036] Furthermore, a first plunger 23 and a first cylinder block 24 that cooperate with each other are respectively arranged on one side of the variable swash plate 22, and the first plunger 23 and the first cylinder block 24 are slidably connected inside.

[0037] Please refer to Figure 3 , in this embodiment, the regulator 3 includes a swing plate 31, and the swing plate 31 is located outside the housing 1;

[0038] Specifically, a cylindrical pin shaft 32 and a tension spring 33 are respectively arranged on one side of the swing plate 31 away from the swing column 25, and the cylindrical pin shaft 32 is located above the tension spring 33.

[0039] Furthermore, a rocker plate 34 is also arranged on the side of the cylindrical pin shaft 32, and the end of the rocker plate 34 contacts the cylindrical pin shaft 32. The rocker plate 34 is arranged in an L shape, and the end of the rocker plate 34 is fixedly connected to the part of the swing column 25 outside the housing 1. The purpose of the cylindrical pin shaft 32 is to make the rocker plate 34 return to the center (return to the corresponding position), and there is no power output in the state of returning to the center;

[0040] The swing plate 31 is connected to the housing 1 through a cylindrical fixed pin shaft 35. The cylindrical pin shaft 32 can achieve fine adjustment and realize the inaccurate control of the power of the output shaft caused by the errors of the components.

[0041] In this embodiment, a spring fixing plate 5 to which the end of the tension spring 33 is hooked is also arranged at the end of the housing 1, and the spring fixing plate 5 is located on the side of the rocker plate 34 away from the swing plate 31.

[0042] In this embodiment, the end of the input shaft 21 penetrates through the inside of the first cylinder block 24, and the first cylinder block 24 and the input shaft 21 are drivingly connected through an involute spline.

[0043] By adopting the above technical solution, pulling one end of the rocker plate 34 causes the rocker plate 34 to rotate about the bending point as the axis, so that the other end of the rocker plate 34 pushes the cylindrical pin shaft 32 on the swing plate 31 to move. The rocker plate 34 drives the variable swash plate 22 inside the housing 1 to tilt and rotate through the swing column 25. At this time, the thrust bearing inside the housing 1 also follows the variable swash plate 2 to tilt and rotate, thereby adjusting the stroke between the first plunger 23 and the first cylinder block 24, changing the volume inside the first plunger 23 and the first cylinder block 24, and further changing the oil inlet and outlet amounts. Cooperating with the fixed-displacement motor assembly 4 to achieve stepless speed change, and the variable pump assembly 2 and the fixed-displacement motor assembly 4 are staggered, increasing the installation method of this power assembly, and the tension spring 33 pulls the swing plate 31 to automatically rebound, improving vehicle safety.

[0044] In this embodiment, a cavity is provided inside the first plunger 23, and a compression spring is placed inside the cavity, so that the end of the first plunger 23 abuts against the side of the thrust ball bearing.

[0045] Please refer to Figures 7-8 In this embodiment, the swing column 25 and the housing 1 are connected through an oil-free bearing, and a sealing end cover is further provided at the ends of the swing column 25 and the housing 1, and the sealing end cover is located on the side of the oil-free bearing connection.

[0046] In this embodiment, the fixed-displacement motor assembly 4 includes an output shaft 41 movably connected to the housing 1, and a fixed-displacement swash plate 42 is provided on the outer side of the output shaft 41, and the fixed-displacement swash plate 42 is fixed inside the housing 1; the output shaft 41 corresponds at a right angle to the input shaft 21.

[0047] In this embodiment, a thrust bearing is fixed inside the fixed-displacement swash plate 42, and the thrust bearing is disposed obliquely relative to the output shaft 41.

[0048] In this embodiment, a second plunger 43 and a second cylinder block 44 are further provided on the side of the fixed-displacement swash plate 42, and the second plunger 43 and the second cylinder block 44 are slidably matched with each other, so that hydraulic oil pushes the second plunger 43 to move inside the second cylinder block 44.

[0049] In this embodiment, the oil chamber on one side of the variable pump assembly 2 and the oil chamber on one side of the fixed-displacement motor assembly 4 are communicated through a central flow distribution plate module.

[0050] In this embodiment, cylindrical oil grooves are formed in an annular array inside the first cylinder block 24, and the first plunger 23 is inserted inside the cylindrical oil grooves.

[0051] In this embodiment, a deep groove ball bearing is provided at the end of the cylindrical pin shaft 32, and the inner ring of the deep groove ball bearing is connected to the cylindrical pin shaft 32 in a mating manner.

[0052] In this embodiment, an arc-shaped groove is provided on one side of the rocker plate 34 close to the cylindrical pin shaft 32, and the side surface of the deep groove ball bearing is attached to the arc-shaped groove, reducing the wear at the connection when the rocker plate 34 pushes the cylindrical pin shaft 32 to move.

[0053] In this embodiment, an oil replenishing port is provided on the side surface of the housing 1, which is used to replenish the hydraulic oil at any time in cooperation with an oil replenishing pump.

[0054] The working principle of the present utility model is as follows: When in use, first, the hydraulic oil enters the interior of the oil cavity through the oil replenishing port at the front end of the housing 1 by the oil supply pump. The input shaft 21 drives the first cylinder block 24 and the first plunger 23 to rotate, sucking in and discharging the hydraulic oil. The hydraulic oil in the oil cavity on one side of the variable pump assembly 2 is sent into the oil cavity on one side of the fixed-displacement motor assembly 4 through the internal channel of the central flow distribution plate. The hydraulic oil enters the inner side of the second cylinder block 44, pushing the second plunger 43 on the inner side of the second cylinder block 44 to move outward. Since the end of the second plunger 43 is attached to the inclined surface of the fixed-displacement swash plate 42, when the fixed-displacement swash plate 42 moves outward, it will rotate along the axis of the output shaft 41, thereby driving the output shaft 41 to rotate.

[0055] When adjusting the transmission ratio, pull one end of the rocker plate 34. The rocker plate 34 rotates with the bending point as the axis, so that the other end of the rocker plate 34 pushes the cylindrical pin shaft 32 on the swing plate 31 to move. The rocker plate 34 drives the variable swash plate 22 inside the housing 1 to tilt and rotate through the swing column 25. At this time, the thrust bearing inside the housing 1 also follows the variable swash plate 22 to tilt and rotate, thereby adjusting the stroke between the first plunger 23 and the first cylinder block 24, changing the volume inside the first plunger 23 and the first cylinder block 24, and further changing the oil intake and oil output. In cooperation with the fixed-displacement motor assembly 4, stepless speed change is achieved. Moreover, the variable pump assembly 2 and the fixed-displacement motor assembly 4 are staggered, increasing the installation method of this power assembly. And the tension spring 33 pulls the swing plate 31 to automatically rebound, improving the vehicle safety.

[0056] For those skilled in the art, it is obvious that the present utility model is not limited to the details of the above-described exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic characteristics of the present utility model. Therefore, in any aspect, the embodiments should be regarded as exemplary and non-limiting. The scope of the present utility model is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be encompassed within the present utility model. Any reference signs in the claims should not be regarded as limiting the claims involved.

[0057] In addition, it should be understood that although this specification is described according to embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A mechanical continuously variable transmission assembly, characterized in that: The invention comprises a housing (1), a variable displacement pump assembly (2) and a quantitative motor assembly (4), wherein the variable displacement pump assembly (2) and the quantitative motor assembly (4) are respectively installed alternately at the end of the housing (1) and the side of the housing (1), and a regulator (3) is installed at one end of the housing (1) away from the quantitative motor assembly (4); The variable displacement pump assembly (2) comprises an input shaft (21) movably connected to the side of the housing (1), and a variable displacement swash plate (22) is provided on the outer side of the input shaft (21) and is transmission-connected to the regulator (3); The variable swash plate (22) is arranged on the inner side of the housing (1), and a swing column (25) movably connected to the housing (1) is provided on one side of the variable swash plate (22), and the swing column (25) extends to an outer end of the housing (1); A thruster bearing is installed on the inner side of the variable swash plate (22), and an end of the first plunger (23) away from the first cylinder body (24) is attached to the side surface of the thruster bearing; One side of the variable swash plate (22) is provided with a first plunger (23) and a first cylinder body (24) that cooperate with each other, and the first plunger (23) and the first cylinder body (24) are slidably connected to each other on their inner sides; The regulator (3) comprises a swing plate (31), and the swing plate (31) is located outside the housing (1).

2. The mechanical stepless transmission assembly according to claim 1, characterized in that: A cylindrical pin (32) and a tension spring (33) are respectively provided on the side of the swing plate (31) away from the swing column (25), and the cylindrical pin (32) is located above the tension spring (33).

3. The mechanical continuously variable transmission assembly according to claim 2, wherein: A rocking plate (34) is also provided on the side of the cylindrical pin shaft (32), and the end of the rocking plate (34) contacts the cylindrical pin shaft (32). The rocking plate (34) is arranged in an L shape, and the end of the rocking plate (34) is fixedly connected to the portion of the swing column (25) located outside the housing (1); the swinging plate (31) is connected to the housing (1) via a cylindrical fixing pin (35) fixed to the housing (1).

4. The mechanical continuously variable transmission assembly according to claim 1, wherein: The end of the housing (1) is also provided with a spring fixing plate (5) which is hooked to the end of the tension spring (33), and the spring fixing plate (5) is located on a side of the rocking plate (34) away from the swinging plate (31).

5. The mechanical stepless transmission assembly according to claim 1, characterized in that: The end of the input shaft (21) passes through the inner side of the first cylinder body (24), and the first cylinder body (24) and the input shaft (21) are connected via an involute spline transmission.

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