Speed reducer with torque measuring device

Abstract

The utility model discloses a speed reducer with a torque measuring device, and the speed reducer with the torque measuring device comprises a front housing, an input shaft is arranged in an inner cavity of the front housing, and one end of the input shaft is connected with an input bevel gear; an output shaft; a rear end cover is fixedly connected to one side of the front shell; the device comprises an axial force measuring unit and a data display unit, the data display unit is connected with the axial force measuring unit, and the data display unit can display data of rotation power and torque. The transmission torque and the transmission power can be obtained through measurement, so that the working state of a transmission system and the working state of a prime motor can be effectively monitored, the overall operation condition of the system is measured while power is transmitted, and then feedback control over power output in the follow-up process is facilitated; therefore, the speed reducer is particularly suitable for being used in the scene of a speed reducer with extremely high lightweight requirement or large variable load range in the working process.

Description

Technical Field

[0001] The present application relates to a reducer with a torque measuring device. Background Art

[0002] Mechanical gear reducer is an important transmission device that can convert a high-speed, low-torque motor into a low-speed, high-torque output. Mechanical gear reducer works on the principle of gear transmission. The gear on the input shaft is driven by the motor and starts to rotate. The rotating input gear meshes with other gears inside the reducer to transmit power. The gears of different sizes inside the reducer are combined to form a gear series. Through continuous meshing and rotation, the high-speed, low-torque power on the input shaft is gradually converted into a low-speed, high-torque output. The output shaft is connected to the last gear and transmits the output torque to the load.

[0003] In common mechanical gear reducers, since the load changes are small during operation and the strength redundancy design is large, there is no need to consider the impact of load changes on the reducer. However, in some scenarios where lightweight requirements are extremely high or the load range is large during operation, the transmitted power must be monitored to prevent excessive transmission load from damaging the gear set of the reducer. In addition, in situations where precise power control is required, the torque transmitted by the reducer must also be monitored.

[0004] That is, the prior art has the following technical problem: it is difficult for ordinary mechanical gear reducers to monitor the transmitted power and the transmitted torque. Therefore, a reducer with a torque measuring device is proposed to solve the above problem. Summary of the invention

[0005] In this embodiment, a reducer with a torque measuring device is provided to solve the problem that ordinary mechanical gear reducers in the prior art are difficult to monitor the transmitted power and the transmitted torque.

[0006] According to one aspect of the present application, a reducer with a torque measuring device is provided, and the reducer with the torque measuring device comprises:

[0007] A front housing, wherein an input shaft is disposed in an inner cavity of the front housing, and an input bevel gear is connected to one end of the input shaft;

[0008] An output shaft, the output shaft is arranged in the inner cavity of the front housing, and one end of the output shaft is connected to an output bevel gear;

[0009] A rear end cover is fixedly connected to one side of the front housing;

[0010] An axial force measuring unit, wherein the axial force measuring unit is fixed on the front housing and can measure the axial force generated by the gear;

[0011] A data display unit is connected to the axial force measurement unit, and the data display unit can display the data of rotational power and torque.

[0012] Furthermore, the input bevel gear is fixedly connected to the input shaft.

[0013] Furthermore, the input shaft and the input bevel gear are manufactured as one piece.

[0014] Furthermore, a support component is provided at the input shaft, and the support component includes an input shaft front bearing and an input shaft rear bearing. The input shaft front bearing and the input shaft rear bearing are provided at the input shaft and support the input shaft.

[0015] Furthermore, the output shaft is fixedly connected to the output bevel gear.

[0016] Furthermore, the output shaft and the output bevel gear are manufactured as one piece.

[0017] Furthermore, a support portion is provided at the output shaft, and the support portion includes an output shaft front bearing and an output shaft rear bearing. The output shaft front bearing and the output shaft rear bearing are provided at the output shaft and support the output shaft.

[0018] Furthermore, the output helical gear and the input helical gear are meshed with each other.

[0019] Furthermore, the axial force measuring unit includes a fixed end cover and a pressure sensor. The fixed end cover is arranged at the front housing and fixedly connected to the front housing by bolts. The pressure sensor is fixedly arranged inside the fixed end cover. The pressure sensor is arranged in the direction of the axial force of the gear.

[0020] Furthermore, the data display unit includes a tangential force calculator, a torque calculator, a transfer power calculator and a data display, the tangential force calculator is electrically connected to the pressure sensor, the tangential force calculator is electrically connected to the torque calculator, the torque calculator is electrically connected to the transfer power calculator, and the tangential force calculator, torque calculator and transfer power calculator are all electrically connected to the data display.

[0021] Through the above-mentioned embodiments of the present application, the transmitted torque and transmission power can be measured, so that the working status of the transmission system or the prime mover can be effectively monitored, and the overall operation of the system can be measured while transmitting power, so as to facilitate the subsequent feedback control of the power output. It is particularly suitable for use in scenarios with extremely high requirements for lightweight or a large range of variable loads during operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0023] Figure 1 This is a schematic diagram of a three-dimensional structure of an embodiment of the present application;

[0024] Figure 2 This is a schematic diagram of the internal structure of an embodiment of the present application;

[0025] Figure 3 This is a front structural schematic diagram of an embodiment of the present application;

[0026] Figure 4 This is a schematic diagram of a top view of an embodiment of the present application;

[0027] Figure 5 This is a connection diagram of a data display unit according to an embodiment of the present application.

[0028] In the figure: 1. input shaft; 2. output bevel gear; 3. output shaft; 4. pressure sensor; 5. fixed end cover; 6. front housing; 7. rear end cover; 8. output shaft rear bearing; 9. output shaft front bearing; 10. input shaft rear bearing; 11. input shaft front bearing; 12. input bevel gear; 13. tangential force calculator; 14. torque calculator; 15. transmitted power calculator; 16. data display. DETAILED DESCRIPTION

[0029] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present application.

[0030] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequential order. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present application described here. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0031] In the present application, the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings. These terms are mainly used to better describe the present application and its embodiments, and are not used to limit the indicated devices, elements or components to have a specific orientation, or to be constructed and operated in a specific orientation.

[0032] In addition, some of the above terms may be used to express other meanings in addition to indicating orientation or positional relationship. For example, the term "on" may also be used to express a certain dependency or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in this application can be understood according to specific circumstances.

[0033] In addition, the terms "installed", "set", "provided with", "connected", "connected", and "socketed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, elements, or components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0034] See also Figure 1-5 As shown, a reducer with a torque measuring device, the reducer with a torque measuring device comprises:

[0035] A front housing 6, wherein an input shaft 1 is disposed in an inner cavity of the front housing 6, and an input bevel gear 12 is connected to one end of the input shaft 1;

[0036] An output shaft 3, wherein the output shaft 3 is disposed in the inner cavity of the front housing 6, and one end of the output shaft 3 is connected to the output bevel gear 2;

[0037] A rear end cover 7 is fixedly connected to one side of the front housing 6;

[0038] An axial force measuring unit, which is fixed on the front housing 6 and can measure the axial force generated by the gear;

[0039] A data display unit is connected to the axial force measurement unit, and the data display unit can display the data of rotational power and torque.

[0040] Through the above technical solution, the transmission torque and transmission power are measured, so that the working state of the transmission system or the prime mover can be effectively monitored, and the overall operation of the system can be measured while the power is transmitted, so as to facilitate the subsequent feedback control of the power output, which is particularly suitable for the use of reducers with extremely high requirements for lightweight or a large variable load range during operation; the input helical gear 12 is fixedly connected to the input shaft 1;

[0041] The input shaft 1 and the input bevel gear 12 are manufactured as one body; a supporting component is provided at the input shaft 1, and the supporting component includes an input shaft front bearing 11 and an input shaft rear bearing 10, and the input shaft front bearing 11 and the input shaft rear bearing 10 are provided at the input shaft 1 and support the input shaft 1.

[0042] The output shaft 3 is fixedly connected to the output helical gear 2; the output shaft 3 and the output helical gear 2 are manufactured as one piece.

[0043] The output shaft 3 is provided with a support portion, and the support portion includes an output shaft front bearing 9 and an output shaft rear bearing 8, and the output shaft front bearing 9 and the output shaft rear bearing 8 are provided at the output shaft 3 and support the output shaft 3; the output helical gear 2 and the input helical gear 12 are meshed with each other;

[0044] The axial force measuring unit includes a fixed end cover 5 and a pressure sensor 4. The fixed end cover 5 is arranged at the front housing 6 and is fixedly connected to the front housing 6 by bolts. The pressure sensor 4 is fixedly arranged inside the fixed end cover 5. The pressure sensor 4 is arranged in the direction of the axial force of the gear. According to the technical solution, the axial force of the gear can be measured by the pressure sensor 4.

[0045] The data display unit includes a tangential force calculator 13, a torque calculator 14, a transmission power calculator 15 and a data display 16. The tangential force calculator 13 is electrically connected to the pressure sensor 4, the tangential force calculator 13 is electrically connected to the torque calculator 14, the torque calculator 14 is electrically connected to the transmission power calculator 15, and the tangential force calculator 13, the torque calculator 14 and the transmission power calculator 15 are all electrically connected to the data display 16.

[0046] During the working process, the tooth surfaces of the input and output helical gears generate tangential forces. Since the gears have a helical angle, the tangential forces also generate additional axial forces in the axial direction of the gears. The axial forces generated by the gears are measured by a pressure sensor (4).

[0047] Furthermore, the tangential force is calculated in the tangential force calculator (13). When the helical gear transmits torque, three main force components are generated: tangential force (Ft), radial force (Fr) and axial force (Fa). These force components are related to the helix angle (β) and load angle (φ) of the gear.

[0048] For helical or spiral gears, the relationship between the tangential force (Ft), radial force (Fr), and axial force (Fa) can be expressed by the following formula:

[0049] Tangential force: This is the force parallel to the tangent direction of the gear tooth surface and is used to transmit torque.

[0050] Radial Force: This is the force directed toward the center of the gear, perpendicular to the gear axis.

[0051] Axial force: This is the force in the direction along the axis of the gear.

[0052] The relationship between these three force components can be expressed by the following formula:

[0053] Ft / cosβ=Fr / sinβ=Fa

[0054] Where β is the helix angle of the gear.

[0055] From the formula above, if we know the axial force (Fa) and the helix angle (β), we can calculate the tangential force (Ft):

[0056] Ft=Fa×cosβ

[0057] Then, the torque is calculated in the torque calculator (14), and after the tangential force is obtained, the torque is calculated according to the tangential force and the pitch circle diameter;

[0058] Torque (T) is the product of force and lever arm (or distance). For gear transmission, tangential force (Ft) is the force acting on the gear tooth surface, which is perpendicular to the radius of the gear (i.e. the pitch circle radius r); therefore, torque can be calculated by the following formula:

[0059] T=Ft×r

[0060] Where r is the radius of the pitch circle, which can be obtained by dividing the pitch circle diameter d by 2:

[0061] r=d / 2

[0062] Substituting the expression for r into the formula for torque yields:

[0063] T=Ft×d / 2

[0064] Therefore, as long as the tangential force and the pitch circle diameter are known, the torque can be calculated using the above formula.

[0065] Finally, the transmitted power calculator (15) calculates the transmitted power, and further, given the torque (T) and the operating speed (n), the transmitted power (P) can be calculated;

[0066] Power (P) is the work done per unit time. For rotating systems, such as gear transmissions, the relationship between power, torque and speed can be expressed by the following formula:

[0067] P=(T×n) / 9550

[0068] in,

[0069] P is power, usually in kilowatts (kW)

[0070] T is the torque, usually in Newton meters (Nm)

[0071] n is the speed, usually in revolutions per minute (rpm)

[0072] 9550 is a constant used for unit conversion (from Nm·rpm to kW);

[0073] Therefore, as long as the torque and operating speed are known, the power transmitted can be calculated using the above formula.

[0074] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A reducer with a torque measuring device, characterized in that: The reducer with torque measuring device comprises: A front housing (6), wherein an input shaft (1) is disposed in an inner cavity of the front housing (6), and an input bevel gear (12) is connected to one end of the input shaft (1); An output shaft (3), the output shaft (3) being arranged in the inner cavity of the front housing (6), and one end of the output shaft (3) being connected to an output bevel gear (2); A rear end cover (7) is fixedly connected to one side of the front housing (6); An axial force measuring unit, the axial force measuring unit is fixed on the front housing (6), and the axial force measuring unit can measure the axial force generated by the gear; A data display unit is connected to the axial force measurement unit, and the data display unit can display the data of rotational power and torque.

2. A reducer with a torque measuring device according to claim 1, characterized in that: The input bevel gear (12) is fixedly connected to the input shaft (1).

3. A reducer with a torque measuring device according to claim 1, characterized in that: The input shaft (1) and the input bevel gear (12) are manufactured as one piece.

4. A reducer with a torque measuring device according to claim 1, characterized in that: The input shaft (1) is provided with a support component, the support component comprising an input shaft front bearing (11) and an input shaft rear bearing (10), the input shaft front bearing (11) and the input shaft rear bearing (10) are provided at the input shaft (1) and support the input shaft (1).

5. A reducer with a torque measuring device according to claim 1, characterized in that: The output shaft (3) is fixedly connected to the output bevel gear (2).

6. A reducer with a torque measuring device according to claim 1, characterized in that: The output shaft (3) and the output bevel gear (2) are manufactured as one piece.

7. A reducer with a torque measuring device according to claim 1, characterized in that: The output shaft (3) is provided with a support portion, the support portion comprising an output shaft front bearing (9) and an output shaft rear bearing (8), the output shaft front bearing (9) and the output shaft rear bearing (8) being provided at the output shaft (3) and supporting the output shaft (3).

8. A reducer with a torque measuring device according to claim 1, characterized in that: The output helical gear (2) and the input helical gear (12) are meshed with each other.

9. A reducer with a torque measuring device according to claim 1, characterized in that: The axial force measuring unit comprises a fixed end cover (5) and a pressure sensor (4); the fixed end cover (5) is arranged at the front housing (6) and is fixedly connected to the front housing (6) by bolts; the pressure sensor (4) is fixedly arranged inside the fixed end cover (5); and the pressure sensor (4) is arranged in the direction of the axial force acting on the gear.

10. A reducer with a torque measuring device according to claim 1, characterized in that: The data display unit comprises a tangential force calculator (13), a torque calculator (14), a transfer power calculator (15) and a data display (16); the tangential force calculator (13) is electrically connected to the pressure sensor (4); the tangential force calculator (13) is electrically connected to the torque calculator (14); the torque calculator (14) is electrically connected to the transfer power calculator (15); and the tangential force calculator (13), the torque calculator (14) and the transfer power calculator (15) are all electrically connected to the data display (16).

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