Matching and adjusting device for lead screw and nut

Abstract

The utility model discloses a lead screw nut matching and adjusting device, and belongs to the technical field of lead screw nut matching and adjusting. The device comprises a lead screw nut, a first wave spring, a second wave spring and a locking nut, the lead screw nut is sleeved with a lead screw nut outer ring, and a first ball is installed between the lead screw nut and the lead screw nut outer ring. The first wave spring is located between the end face of the steering shell and the lead screw nut, the second wave spring is located between the lead screw nut and the locking nut, and the locking nut enables the lead screw nut to be installed in the steering shell through the second wave spring and the first wave spring. According to the utility model, the lead screw nut and the lead screw are matched and adjusted, and the lead screw nut is fixed on the steering shell by the locking nut, so that the weight and the cost are obviously reduced. And the screw rod is matched with the nut to perform self-adjustment so as to be suitable for most working conditions.

Description

Technical Field

[0001] This utility model relates to the field of lead screw nut fitting and adjustment technology, specifically to a lead screw nut fitting and adjustment device. Background Technology

[0002] With the trend towards lightweighting and cost reduction in automobiles, how to reduce weight and lower costs while maintaining the function and strength of the lead screw nut is particularly important for vehicles. Existing lead screw nuts suffer from problems such as complex structure and high cost.

[0003] Therefore, the existing lead screw nut needs to be improved. Utility Model Content

[0004] The purpose of this invention is to provide a highly efficient screw and nut fitting and adjustment device, wherein the screw and nut fitting can be self-adjusting to suit most working conditions.

[0005] To solve the above-mentioned technical problems, this utility model provides a screw nut fitting and adjustment device, including a screw nut, a first wave spring, a second wave spring and a locking nut;

[0006] The lead screw nut is fitted with an outer ring, and a first ball bearing is installed between the lead screw nut and the outer ring.

[0007] The first wave spring is located between the end face of the steering housing and the lead screw nut, and the second wave spring is located between the lead screw nut and the locking nut. The locking nut installs the lead screw nut into the steering housing through the second wave spring and the first wave spring.

[0008] Preferably, it also includes a cage;

[0009] The cage is installed between the outer ring of the lead screw nut and the lead screw nut, and the first ball is installed on the cage.

[0010] Preferably, a first ball raceway is provided on the inner side of the outer ring of the lead screw nut and on the outer side of the lead screw nut;

[0011] The first ball is mounted on the first ball raceway.

[0012] Preferably, an adjusting shim is provided between the first wave spring and the steering housing.

[0013] Preferably, it further includes a ball conduit and a second ball;

[0014] The ball bearing guide is sleeved on the outside of the lead screw nut, and the second ball bearing is installed between the ball bearing guide and the lead screw nut.

[0015] Preferably, the ball bearing conduit includes a first ball bearing conduit and a second ball bearing conduit in the shape of a semi-circular arc cylinder.

[0016] Preferably, the two ends of the first ball bearing guide and the second ball bearing guide are connected by a first ball bearing guide clamp and a second ball bearing guide clamp, respectively.

[0017] Preferably, the first ball guide, the second ball guide, and the lead screw nut are provided with a second ball raceway;

[0018] The second ball is mounted on the second ball raceway.

[0019] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0020] This invention provides a method for the fit and adjustment of a lead screw nut and a lead rod. A locking nut is used to fix the lead screw nut to the steering housing, resulting in significant weight reduction and cost reduction. The lead rod and nut fit is self-adjustable to suit most operating conditions.

[0021] The specific advantages of a lead screw nut and lead screw fit and adjustment method include the following:

[0022] 1. The lead screw nut is fixed by engaging with the end face of the housing through a locking nut, which reduces the use of bolts between the housing and the lead screw nut, thereby reducing the number of accessories and lowering costs.

[0023] 2. The main body of the lead screw nut is composed of a cage, steel balls and an outer ring of the lead screw nut to form an integrated lead screw nut, so that the nut can rotate when the outer ring is fixed, thus ensuring operation;

[0024] 3. The adjustment of the lead screw nut is achieved by a locking nut and a wave spring. There are adjusting shims and a wave spring between the lead screw nut and the housing. The lead screw nut can be adjusted by adjusting the gap between the locking nut and the housing and compressing the wave spring. Attached Figure Description

[0025] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings.

[0026] Figure 1 This is a schematic diagram of the structure of a screw nut fitting and adjustment device according to the present invention;

[0027] Figure 2 This is a schematic diagram of the structure in which the lead screw nut, the lead screw nut outer ring, the cage, and the first ball are combined into a whole.

[0028] Figure 3 This is a schematic diagram of the structure in which the ball guide is clamped by the ball guide clamp;

[0029] In the picture:

[0030] 1. Steering housing; 2. Adjusting shim; 3. First wave spring; 3-1. Second wave spring; 4. Cage; 5. First ball; 6. Outer ring of lead screw nut; 7. Locking nut; 8. Lead screw nut; 9. First ball guide clamp; 10. Second ball guide clamp; 11. First ball guide; 12. Second ball guide; 13. Second ball. Detailed Implementation

[0031] Many specific details are set forth in the following description to provide a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0032] The terminology used in one or more embodiments of this specification is for the purpose of describing particular embodiments only and is not intended to be limiting of the one or more embodiments of this specification. The singular forms “a,” “described,” and “the” as used in one or more embodiments of this specification and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term “and / or” as used in one or more embodiments of this specification refers to and includes any or all possible combinations of one or more associated listed items.

[0033] It should be understood that although the terms first, second, etc., may be used to describe various information in one or more embodiments of this specification, such information should not be limited to these terms. These terms are only used to distinguish information of the same type from one another. For example, first may also be referred to as second without departing from the scope of one or more embodiments of this specification, and similarly, second may also be referred to as first. Depending on the context, the word "if" as used herein may be interpreted as "when," "when," or "in response to a determination."

[0034] The present invention will now be described in further detail with reference to the accompanying drawings:

[0035] This utility model provides a screw nut fitting and adjustment device, including a screw nut 8, a first wave spring 3, a second wave spring 3-1 and a locking nut 7;

[0036] The lead screw nut 8 is fitted with a lead screw nut outer ring 6, and a first ball bearing 5 is installed between the lead screw nut 8 and the lead screw nut outer ring 6;

[0037] The first wave spring 3 is located between the end face of the steering housing 1 and the lead screw nut 8, and the second wave spring 3-1 is located between the lead screw nut 8 and the locking nut 7. The locking nut 7 installs the lead screw nut into the steering housing 1 through the second wave spring 3-1 and the first wave spring 3.

[0038] Preferably, it also includes a cage 4;

[0039] The retainer 4 is installed between the outer ring 6 of the lead screw nut and the lead screw nut 8, and the first ball 5 is installed on the retainer 4.

[0040] Preferably, a first ball raceway is provided on the inner side of the outer ring 6 of the lead screw nut and on the outer side of the lead screw nut 8;

[0041] The first ball 5 is mounted on the first ball raceway.

[0042] Preferably, an adjusting shim 2 is provided between the first wave spring 3 and the steering housing 1.

[0043] Preferably, it further includes a ball conduit and a second ball 13;

[0044] The ball guide tube is sleeved on the outside of the lead screw nut 8, and the second ball 13 is installed between the ball guide tube and the lead screw nut 8.

[0045] Preferably, the ball bearing conduit includes a first ball bearing conduit 11 and a second ball bearing conduit 12 in the shape of a semi-circular arc cylinder.

[0046] Preferably, the two ends of the first ball bearing conduit 11 and the second ball bearing conduit 12 are connected by a first ball bearing conduit clamp 9 and a second ball bearing conduit clamp 10, respectively.

[0047] Preferably, the first ball guide tube 11, the second ball guide tube 12, and the lead screw nut 8 are provided with second ball raceways;

[0048] The second ball 13 is mounted on the raceway with the second ball.

[0049] To better illustrate the technical effects of this utility model, the present utility model provides the following specific embodiments to explain the above technical process:

[0050] Example 1: A screw nut fitting and adjustment device, comprising: a steering housing 1, an adjusting shim 2, a first wave spring 3, a second wave spring 3-1, a retainer 4, a first ball bearing 5, a screw nut outer ring 6, a locking nut 7, a screw nut 8, a first ball bearing guide clamp 9, a second ball bearing guide clamp 10, a first ball bearing guide 11, a second ball bearing guide 12, and a second ball bearing 13;

[0051] The adjusting shim 2 and the first wave spring 3 are installed on the end face of the steering housing 1. After the lead screw nut 8 is installed into the steering housing 1, the second wave spring 3-1 and the locking nut 7 are used to fix the lead screw nut 8 into the steering housing 1. The lead screw nut 8 is adjusted by adjusting the locking nut 7. The locking nut 7 compresses the second wave spring 3-1 to move the lead screw nut 8, thereby compressing the first wave spring 3.

[0052] The lead screw nut 8 has the retainer 4, the first ball 5 and the lead screw nut outer ring 6 on its outer ring. It is installed on the lead screw nut 8 to form a whole with it. The lead screw nut 8 can rotate while the lead screw nut outer ring 6 is fixed in the steering housing 1.

[0053] The outer side of the lead screw nut 8 is composed of the first ball guide 11, the second ball guide 12, the first ball guide clamp 9, the second ball guide clamp 10, and the second ball 13 forming a loop;

[0054] The specific adjustment process of the screw nut fitting and adjustment device of this utility model is as follows:

[0055] 1. The adjusting shim 2 and the first wave spring 3 are used as buffers between the end face of the steering housing 1 and the lead screw nut 8. The second wave spring 3-1 is installed on the end face of the outer ring 6 of the lead screw nut. The lead screw nut 8 is then fixed to the steering housing 1 with the locking nut 7. Adjustment is made by utilizing the deformation of the locking nut 7, the first wave spring 3, and the second wave spring 3-1. Figure 1 As shown;

[0056] 2. The lead screw nut 8 has a retainer 4 on its outer ring; the retainer 4 contains the first ball bearing 5. The lead screw nut 8, the outer ring 6 of the lead screw nut, the retainer 4, and the first ball bearing 5 together form a whole. When the outer ring 6 of the lead screw nut is fixed by the adjustment of the locking nut 7 and the first wave spring 3 and the second wave spring 3-1, the lead screw nut 8 can work normally. Figure 2 As shown;

[0057] 3. The lead screw nut 8 mates with the first ball guide 11 and the second ball guide 12, and the first ball guide 11 and the second ball guide 12 are clamped by the first ball guide clamp 9 and the second ball guide clamp 10; for example Figure 3 As shown;

[0058] 4. During reversal, the lead screw nut 8 first converts the torque from the motor into the axial thrust of the lead screw through the second ball 13. When the lead screw nut 8 is working, the first wave spring 3 and the second wave spring 3-1 are compressed to reduce noise.

[0059] The second ball 13 can reduce the friction between the lead screw and the lead screw nut 8 to improve transmission efficiency. In the actual application of the steering system, the load-bearing capacity of the lead screw nut can be adjusted by adjusting the number of second balls 13 used. The more second balls 13 there are, the greater the load-bearing capacity.

[0060] When the second ball 13 is under load, it first rolls between the spiral raceway of the lead screw and the spiral raceway of the lead screw nut 8 to realize the transmission and conversion of force, causing the lead screw to move along the axial direction. Then, the second ball 13 continues to pass through the circulation raceway on the steel ball guide tube, enters the inner spiral raceway through the outer circulation hole on the lead screw nut 8, and returns to the raceway through the outer circulation hole on the back side of the lead screw nut 8, forming an outer circulation structure. This structure realizes both the force transmission function and the outer circulation of the second ball 13, making the product structure more compact.

[0061] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any changes or substitutions within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. A device for fitting and adjusting a lead screw and nut, characterized in that, It includes a lead screw nut (8), a first wave spring (3), a second wave spring (3-1), and a locking nut (7); The lead screw nut (8) is fitted with a lead screw nut outer ring (6), and a first ball (5) is installed between the lead screw nut (8) and the lead screw nut outer ring (6); The first wave spring (3) is located between the end face of the steering housing (1) and the lead screw nut (8), and the second wave spring (3-1) is located between the lead screw nut (8) and the locking nut (7). The locking nut (7) installs the lead screw nut into the steering housing (1) through the second wave spring (3-1) and the first wave spring (3).

2. The screw nut fitting and adjusting device according to claim 1, characterized in that, It also includes a cage (4); The retainer (4) is installed between the outer ring (6) of the lead screw nut and the lead screw nut (8), and the first ball (5) is installed on the retainer (4).

3. The screw nut fitting and adjusting device according to claim 2, characterized in that: The inner side of the outer ring (6) of the lead screw nut and the outer side of the lead screw nut (8) are provided with a first ball raceway; The first ball (5) is mounted on the first ball raceway.

4. The screw nut fitting and adjusting device according to claim 3, characterized in that: An adjusting shim (2) is provided between the first wave spring (3) and the steering housing (1).

5. The screw and nut fitting and adjusting device according to claim 1, characterized in that, It also includes a ball conduit and a second ball (13); The ball guide is sleeved on the outside of the lead screw nut (8), and the second ball (13) is installed between the ball guide and the lead screw nut (8).

6. The screw nut fitting and adjusting device according to claim 5, characterized in that: The ball bearing conduit includes a first ball bearing conduit (11) and a second ball bearing conduit (12) in the shape of a semi-circular cylindrical shape.

7. The screw nut fitting and adjusting device according to claim 6, characterized in that: The first ball conduit (11) and the second ball conduit (12) are connected at both ends by the first ball conduit clamp (9) and the second ball conduit clamp (10), respectively.

8. The screw nut fitting and adjusting device according to claim 7, characterized in that: The first ball guide (11), the second ball guide (12) and the lead screw nut (8) are provided with second ball raceways; The second ball (13) is mounted on the raceway with the second ball.

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