Belt tension adjustment device for a steering gear

Abstract

The utility model relates to the technical field of steering gear adjustment, specifically relates to a kind of belt tensioning adjusting device for steering gear, the device includes cylindrical gear, the number is two, respectively for meshing steering gear in the big pulley of being arranged on screw nut assembly and the small pulley of being arranged on motor spindle;Straight bar, the number is two, and one cylindrical gear is rotatably installed in the end of two straight bars;Chuck, chuck has the placement site for the placement of two straight bars, chuck is also arranged with manual assembly, and manual assembly is used to drive two straight bars relative movement or opposite movement;The cylindrical gear is used to drive the rotation of the big gear while doing linear motion with straight bar, to make screw nut assembly linearly do linear motion along ball screw, and then adjust the pulley center distance of big pulley and small pulley, so that belt tensioning or relaxation;The utility model solves the technical problem that the existing technology exists in belt tensioning adjustment process complex, not easy to adjust in place.

Description

Technical Field

[0001] This utility model relates to the field of steering gear adjustment technology, specifically to a steering gear belt tension adjustment device. Background Technology

[0002] The parallel shaft rack and pinion steering system (REPS) provides assistance by driving the rack through an assist motor and a synchronous belt reduction mechanism. The tension of the belt in the reduction mechanism is particularly critical, affecting the product's NVH characteristics and reliability.

[0003] For example, patent document CN215861574U discloses a steering gear belt tension adjustment mechanism. When adjusting the tension, a rotating motor rotates around a cylindrical pin, allowing for convenient and quick adjustment of the belt tension. When the motor rotates around the rotation axis towards the main housing, the small pulley rotates around the rotation axis towards the main housing, at which point the center distance between the small pulley and the large pulley decreases, and the belt tension decreases. When the motor rotates around the rotation axis 11 away from the main housing, the small pulley rotates around the rotation axis away from the main housing, at which point the center distance between the small pulley and the large pulley 1401 increases, and the belt tension increases. When the motor is rotated to bring the belt tension to a preset value, two bolts, the first motor locking bolt and the second motor locking bolt, pass through the first motor locking bolt slotted hole and the second motor locking bolt slotted hole on the motor housing, respectively, and engage with and lock into the threaded hole on the motor housing, thus completing the belt tension adjustment.

[0004] The above-mentioned belt tensioning device requires a pre-installed motor screw. The center distance between the small pulley and the lead screw nut is changed by continuously pulling the motor controller. The tension is then confirmed. After adjustment, the motor must be kept stationary before finally tightening the screw. The process is relatively complex. It is not easy to adjust accurately when not adjusting on the production line. Utility Model Content

[0005] This utility model provides a belt tension adjustment device for steering gears to solve the technical problems of complex process and difficulty in adjusting belt tension in the prior art.

[0006] To solve the above problems, the steering gear belt tensioning adjustment device provided by this utility model adopts the following technical solution:

[0007] A steering gear belt tension adjustment device, comprising:

[0008] There are two cylindrical gears, one for meshing with the large pulley on the lead screw and nut assembly and the other for meshing with the small pulley on the motor shaft in the steering gear.

[0009] There are two straight rods, and each of the two straight rods has a cylindrical gear rotatably mounted at its end;

[0010] The chuck has a placement position for two straight rods, and a manual component is also arranged on the chuck to drive the two straight rods to move relative to each other or in opposite directions.

[0011] The cylindrical gear is used to drive the large gear to rotate while the rod moves linearly, so that the screw nut assembly moves linearly along the ball screw, thereby adjusting the center distance between the large and small pulleys and making the belt tensioned or loosened.

[0012] The beneficial effects of the belt tension adjustment device for steering gear provided by this utility model are as follows: By manually rotating the component, the distance between the two straight rods can be adjusted, thereby causing the relatively moving cylindrical gear to drive the screw nut assembly to make linear motion on the ball screw. This allows the center distance between the large and small pulleys to be quickly adjusted, thus tightening or loosening the belt. This manual method does not require the installation of an auxiliary motor and can be adjusted manually. It has the advantages of flexible installation and convenient adjustment, and can quickly meet the belt tension adjustment needs of different products. It solves the technical problems of complex process and difficulty in adjusting the belt tension in the prior art.

[0013] Furthermore, the manual assembly includes a positive and negative lead screw, which is installed in the chuck. The ends of the two straight rods are respectively arranged on the positive and negative threaded sections of the positive and negative lead screw, so that the two straight rods move towards or away from each other when the positive and negative lead screws are rotated.

[0014] Furthermore, a pawl is fixed on each of the positive and negative threaded sections of the positive and negative lead screws, and a straight rod is fixed on each of the two pawls by a fastening nut.

[0015] Furthermore, one end of the lead screw protrudes from the chuck, and a cross wrench is fixed to this end to facilitate manual adjustment of the lead screw's rotation by the operator. The cross wrench has the advantages of being easy to hold and simple to operate.

[0016] Furthermore, a fixed bracket is mounted on the chuck, and the ball screw is fixed on the fixed bracket to secure the steering gear belt tension adjustment device. Positioning via the ball screw facilitates the assembly and disassembly of the entire device, allowing for better adaptation to belt tension adjustment for different products.

[0017] Furthermore, the cylindrical gear has an internal cavity, a bearing is installed inside the cavity, and the end of the straight rod is installed inside the bearing, so as to realize the rotational installation of the cylindrical gear at the end of the straight rod.

[0018] Furthermore, the two cylindrical gears are exactly the same size.

[0019] Furthermore, it also includes a tension tester, which is used to test the tension data of the belt after adjustment. Attached Figure Description

[0020] The above and other objects, features, and advantages of the present invention will become readily understood by reading the following detailed description of exemplary embodiments with reference to the accompanying drawings. In the drawings, several embodiments of the present invention are shown by way of example and not limitation, and like or corresponding reference numerals denote like or corresponding parts, wherein:

[0021] Figure 1 This is a schematic diagram showing the application of the steering belt tensioning adjustment device provided by this utility model.

[0022] Figure 2 for Figure 1 Enlarged diagram of point A in the middle.

[0023] Explanation of reference numerals in the attached figures:

[0024] 1. Motor controller; 2. Motor controller fixing bolts; 3. Synchronous belt; 4. Small pulley; 5. Bearing; 6. Cylindrical gear; 7. Straight rod; 8. Fastening nut; 9. Clamping jaw; 10. Chuck; 11. Fixing bracket; 12. Screw; 13. Large pulley; 14. Ball screw; 15. Screw and nut assembly; 16. Cross wrench; 17. Tension tester. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Those skilled in the art should understand that the embodiments described below are only some, not all, of the embodiments disclosed. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0026] The principles and spirit of this utility model will be explained in detail below with reference to several representative embodiments.

[0027] An embodiment of the steering gear belt tension adjustment device provided by this utility model:

[0028] like Figure 1 and Figure 2First, let me briefly introduce the steering gear. The steering gear includes a motor controller 1, which is fixed to the corresponding base by a motor controller fixing bolt 2. The steering gear also includes a small pulley 4 and a large pulley 13. A synchronous belt 3 is fitted on the small pulley 4 and the large pulley 13. The large pulley 13 is mounted on the lead screw nut assembly 15, and the small pulley 4 is mounted on the motor main shaft. The lead screw nut assembly 15 is fixed on the horizontally extending ball screw 14. Since this is existing technology, it will not be described in detail.

[0029] The steering gear belt tensioning adjustment device includes two cylindrical gears 6, two straight rods 7, and a chuck 10. Two cylindrical gears 6 are used to mesh with a large pulley 13 mounted on the lead screw nut assembly 15 and a small pulley 4 mounted on the motor spindle, respectively. Two straight rods 7 are also included, with one of the cylindrical gears 6 rotatably mounted at each end. The chuck 10 has placement positions for the two straight rods 7 and a manual assembly for driving the two straight rods 7 to move relative to each other or in opposite directions.

[0030] The cylindrical gear 6 is used to drive the large gear to rotate while the straight rod 7 makes linear motion, so that the lead screw nut assembly 15 makes linear motion along the ball screw 14, thereby adjusting the center distance between the large pulley 13 and the small pulley 4, so that the belt is tensioned or relaxed.

[0031] Specifically, the manual assembly includes a positive and negative lead screw (not shown in the figure), which is installed in the chuck 10. The ends of the two straight rods 7 are respectively arranged on the positive and negative thread sections of the positive and negative lead screw, so that the two straight rods 7 move towards each other or away from each other when the positive and negative lead screw rotates.

[0032] like Figure 1 As shown, a pawl 9 is fixed on the positive and negative thread sections of the lead screw, and a straight rod 7 is fixed on each of the two pawls 9 by a fastening nut 8.

[0033] For ease of operation, one end of the lead screw protrudes from the chuck 10, and a cross wrench 16 is fixed to this end to facilitate manual adjustment of the lead screw rotation by the operator. The cross wrench 16 has the advantages of being easy to hold and simple to operate. In other embodiments, the cross wrench 16 can also be replaced by a flathead wrench.

[0034] A key feature of this invention is that a fixing bracket 11 is mounted on the chuck 10 via screws 12, and the ball screw 14 is fixed on the fixing bracket 11 to secure the steering gear belt tension adjustment device. Positioning via the ball screw 14 facilitates the installation and removal of the entire device, allowing for better adaptation to belt tension adjustment for different products. In other embodiments, the entire device can be installed without the ball screw 14, or fixed to another foundation; in this case, there is no connection between the chuck 10 and the ball screw 14.

[0035] In this embodiment, the cylindrical gear 6 has a cavity inside, and a bearing 5 is installed inside the cavity. The end of the straight rod 7 is installed inside the bearing 5 to realize the rotational installation of the cylindrical gear 6 at the end of the straight rod 7.

[0036] In this embodiment, the two cylindrical gears 6 are exactly the same size.

[0037] Finally, in this embodiment, the entire device also includes a tension tester 17, which is used to test the tension data of the belt after adjustment.

[0038] The working principle of the belt tension adjustment device for steering gear provided by this utility model is as follows: When it is necessary to adjust the belt tension, turn the cross wrench 16. The two pawls 9 drive the two straight rods 7 to move closer or further apart. The two cylindrical gears 6 move relative to the straight rods 7. During this process, the cylindrical gear 6 corresponding to the large pulley 13 drives the screw nut assembly 15 to rotate. The screw nut assembly 15 moves on the ball screw 14, thereby changing the center distance between the large pulley 13 and the small pulley 4, thus tightening or loosening the belt. Then, the belt tension data can be tested using the tension tester 17. The whole process can be adjusted manually. It has the advantages of flexible installation and convenient adjustment, and can quickly meet the belt tension adjustment needs of different products.

[0039] Based on the above description in this specification, those skilled in the art will also understand that the following terms used, such as "upper," "lower," "front," "rear," "left," "right," "width," "horizontal," "top," "bottom," "inner," and "outer," are terms indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings of this specification. They are only for the purpose of facilitating the explanation of the present invention and simplifying the description, and do not explicitly or implicitly suggest that the device or element involved must have the specific orientation, or be constructed and operated in a specific orientation. Therefore, the above-mentioned orientation or positional relationship terms should not be understood or interpreted as limitations on the present invention.

[0040] In addition, in the description of this specification, "multiple" means at least two, such as two, three or more, etc., unless otherwise expressly and specifically defined.

Claims

1. A belt tensioning adjustment device for a steering gear, characterized in that, The utility model relates to a belt tension adjusting device for steering wheel, which comprises: cylindrical gears, two in number, for engaging with the large pulley arranged on the screw nut assembly in the steering wheel and the small pulley arranged on the motor spindle; straight rods, two in number, each of which has one of the cylindrical gears rotatably installed at the end thereof; a chuck, which has placing positions for the two straight rods and is provided with a manual assembly for driving the two straight rods to move towards or away from each other; the cylindrical gears are used to drive the large pulley to rotate while the straight rods move linearly, so that the screw nut assembly moves linearly along the ball screw, thereby adjusting the distance between the centers of the large and small pulleys to tighten or loosen the belt.

2. The belt tensioner adjustment device for a steering gear according to claim 1, characterized in that: the manual assembly comprises a reversible screw, which is installed in the chuck and has positive and reverse threaded segments on which the ends of the two straight rods are arranged, so that the two straight rods move towards or away from each other when the reversible screw rotates.

3. The belt tensioner adjustment device for a steering gear according to claim 2, characterized in that: each of the positive and reverse threaded segments of the reversible screw is fixed with a jaw, and each of the two jaws is fixed with one of the straight rods through a fastening nut.

4. The belt tension adjustment device for a diverter according to claim 2 or 3, characterized by: one end of the reversible screw protrudes from the chuck and is fixed with a cross wrench to facilitate manual adjustment of the reversible screw by the staff.

5. The belt tensioner adjustment device for a steering gear according to any one of claims 1 to 3, characterized in that: the chuck is provided with a fixed support, and the ball screw is fixed on the fixed support to fix the belt tension adjusting device for steering wheel by means of the ball screw.

6. The belt tensioner adjustment device for a steering gear according to any one of claims 1 to 3, characterized in that: the cylindrical gears have cavities in the interiors, and bearings are installed in the cavities to rotatably install the ends of the straight rods in the bearings.

7. The belt tensioner adjustment device for a steering gear according to any one of claims 1 to 3, characterized in that: the two cylindrical gears are of the same size.

8. The belt tensioner adjustment device for a steering gear according to any one of claims 1 to 3, characterized in that: the utility model further comprises a tension tester, which is used to test the tension data of the belt after adjustment.

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