Steel ball assembling device for internal circulation ball screw mechanism

Abstract

The invention discloses a steel ball assembling device for an internal circulation ball screw mechanism, which is applied to the steel ball assembling of the internal circulation ball screw mechanism with more than 100 steel balls, and comprises a support, an upper support, a lower support, a lower support, a lower support, an upper support and a lower support, the steel ball assembling mechanism is vertically fixed on the upper bracket, a steel ball guide-out opening of the steel ball assembling mechanism is aligned with a nut upper opening, and the steel ball assembling mechanism guides a steel ball into the nut upper opening through the supporting table plate by means of gravity; the nut clamping mechanism is installed on the lower support, and an upper opening of a nut is aligned to a steel ball guide-out opening of the steel ball assembling mechanism through the nut clamping mechanism; the lead screw supporting mechanism is used for supporting the end, not entering the nut, of the lead screw; the nut clamping mechanism and the lead screw supporting mechanism can move relatively, so that the nut moves up and down on the lead screw, and then the steel ball falling into the nut rolls between the nut and the lead screw. Steel ball assembling can be completed with low cost and high efficiency through a simple mechanical mechanism.

Description

Technical Field

[0001] This invention relates to the automotive field, and in particular to a ball bearing assembly device for an internal circulation ball screw mechanism. Background Technology

[0002] In the field of automotive parts manufacturing technology, the ball screw mechanism is a core component in parallel-axis steering gears that enables transmission, and ball bearing assembly is a critical process in the manufacturing of the ball screw mechanism. Internal circulation ball screw mechanisms are widely used in related fields due to their advantages such as high transmission efficiency and compact structure.

[0003] Currently, for the ball assembly of internal circulation roller screw mechanisms, some existing technologies employ a one-time ball-filling assembly method. However, for internal circulation roller screw mechanisms with more than 100 balls, this one-time filling method cannot guarantee the uniformity of ball distribution, easily leading to problems such as jamming and incomplete assembly, affecting the transmission accuracy and service life of the roller screw mechanism. Furthermore, while the existing fully automated ball assembly solution from German manufacturers meets basic product requirements, the high manufacturing cost of automated equipment increases the production cost of internal circulation roller screw mechanisms with more than 100 balls, hindering market competitiveness. Therefore, there is an urgent need for a ball assembly process that is adaptable to internal circulation roller screws with more than 100 balls, offering lower cost and more reliable assembly results. Summary of the Invention

[0004] The summary of this invention introduces a series of simplified concepts, all of which are simplifications of existing technologies in the field, and will be further explained in detail in the detailed description section. This summary is not intended to limit the key features and essential technical features of the claimed technical solution, nor is it intended to determine the scope of protection of the claimed technical solution.

[0005] The technical problem to be solved by the present invention is to provide an internal circulation roller screw that can be adapted to a number of steel balls greater than 100, and a device that can complete the assembly of steel balls at low cost and high efficiency using a simple mechanical mechanism.

[0006] To solve the above-mentioned technical problems, the present invention provides a ball assembly device for an internal circulation ball screw mechanism, which is applied to the ball assembly of an internal circulation ball screw mechanism with more than 100 balls, comprising: The support frame is divided into an upper support frame 2 and a lower support frame 3 by a support platform 1; The steel ball assembly mechanism 4 is vertically fixed on the upper bracket 2. Its steel ball outlet is aligned with the upper opening of the nut. It relies on gravity to guide the steel ball through the support plate 1 and into the upper opening of the nut. The nut clamping mechanism 5 is mounted on the lower bracket 3 and aligns the upper opening of the nut with the ball outlet of the ball assembly mechanism 4. Screw support mechanism 6, which is used to support the screw end that is not engaged with the nut; Among them, the nut clamping mechanism 5 and the screw support mechanism 6 can move relative to each other, so that the nut moves up and down on the screw, and the steel balls that fall into the nut roll into the space between the nut and the screw.

[0007] Preferably, the ball assembly device of the internal circulation ball screw mechanism is further improved, and the nut clamping mechanism 5 is installed on the upper part of the two parallel first guide rails 7 of the lower bracket 3; The lead screw support mechanism 6 is installed on the lower part of the two parallel first guide rails 7 of the lower bracket 3; The nut clamping mechanism 5 and the lead screw support mechanism 6, at least one of them can move up and down along the first guide rail 8.

[0008] Preferably, the ball assembly device of the internal circulation ball screw mechanism is further improved, and the nut clamping mechanism 5 is fixedly installed on the first guide rail 8; The lead screw support mechanism 6 can move up and down.

[0009] Preferably, the ball assembly device of the internal circulation ball screw mechanism is further improved so that the nut clamping mechanism 5 can move up and down; The lead screw support mechanism 6 is fixedly installed on the first guide rail 8.

[0010] Preferably, the ball assembly device of the internal circulation ball screw mechanism is further improved so that both the nut clamping mechanism 5 and the screw support mechanism 6 can move up and down.

[0011] Preferably, the ball assembly device of the internal circulation ball screw mechanism is further improved such that the number of balls allowed to pass through the ball outlet is less than the number of balls that can be accommodated in one turn of the nut thread, so as to avoid excessive ball falling and causing accumulation.

[0012] Preferably, the improved internal circulation ball screw mechanism ball ball assembly device further includes: The drive mechanism 8 is connected to the nut clamping mechanism 5 and the lead screw support mechanism 6 respectively, and is used to drive the nut clamping mechanism 5 and the lead screw support mechanism 6 to generate relative motion.

[0013] Preferably, in a further improvement to the internal circulation ball screw mechanism ball assembly device, the drive mechanism 8 includes: The first connecting part 8.1 is connected to the nut clamping mechanism 5; The second connecting part 8.2, and the lead screw support mechanism 6; The second guide rail 8.3 is fixed on the lower bracket 3, and one end of it is fixedly connected to the first connecting part 8.1 or the second connecting part 8.2; The power source 8.4 is mounted on the second guide rail 8.3 and can drive the first connecting part 8.1 or the second connecting part 8.2 to move on the second guide rail 8.3, thereby causing the nut clamping mechanism 5 and the screw support mechanism 6 to move relative to each other.

[0014] Preferably, in a further improvement of the internal circulation ball screw mechanism ball ball assembly device, the power source 8.4 is a motor, cylinder or hydraulic cylinder.

[0015] Preferably, in a further improvement of the internal circulation ball screw mechanism ball ball assembly device, the power source 8.4 is a crank-driven screw mechanism.

[0016] The working principle of this invention is as follows; Fix the bracket, install the nut and screw between the nut clamping mechanism 5 and the screw support mechanism 6, with the end of the screw abutting against the lower opening of the nut; Align the ball outlet of the ball assembly mechanism 4 with the top of the nut and add a ball to the ball assembly mechanism 4.

[0017] The steel balls roll into the nut due to gravity, which simultaneously causes the nut and the lead screw to move closer to each other. That is, the lead screw rotates into the nut, and the steel balls are installed in sequence. You can choose to install the steel balls in batches to improve the assembly quality.

[0018] This invention can achieve at least the following technical effects; 1. For internal circulation roller screw mechanisms with more than 100 steel balls, the steel ball assembly mechanism of this invention uses gravity to control the steel ball delivery. It can choose to assemble the steel balls in multiple batches. Compared with single-fill assembly, the steel balls are precisely arranged in batches, which effectively avoids uneven distribution and jamming problems caused by too many steel balls.

[0019] Meanwhile, through the coordinated operation of the ball assembly mechanism, the nut clamping mechanism, and the lead screw support mechanism, this invention achieves precise positioning and orderly operation in the assembly process, ensuring assembly quality and thus ensuring the transmission accuracy and service life of the roller lead screw mechanism.

[0020] This invention enables reliable assembly of an internal circulation roller screw mechanism with more than 100 steel balls, ensuring uniform distribution of steel balls, avoiding jamming and improper assembly, and ensuring that the roller screw mechanism has good transmission accuracy and service life, thus meeting the transmission requirements of parallel shaft steering gears.

[0021] 2. Under the premise of meeting the product usage requirements, this invention optimizes the assembly mechanism and process, abandons the existing automated mechanical equipment, adopts a simple mechanical structure, reduces production costs, and achieves the same assembly effect with a simpler and more economical structure, thereby significantly reducing manufacturing costs and enhancing the product's market competitiveness. Attached Figure Description

[0022] The accompanying drawings are intended to illustrate the general characteristics of the methods, structures, and / or materials used in specific exemplary embodiments of the invention, supplementing the description in the specification. However, the drawings are schematic diagrams not drawn to scale and may not accurately reflect the precise structural or performance characteristics of any of the given embodiments. The drawings should not be construed as limiting or restricting the range of numerical values ​​or properties covered by exemplary embodiments of the invention. The invention will now be described in further detail with reference to the accompanying drawings and specific embodiments: Figure 1 This is a schematic diagram of the structure of the first embodiment of the present invention.

[0023] Figure 2 This is a schematic diagram of the structure of the third embodiment of the present invention.

[0024] Explanation of reference numerals in the attached figures: Support plate 1; Upper bracket 2; Lower bracket 3; Steel ball assembly mechanism 4; Nut clamping mechanism 5; Screw support mechanism 6 First guide rail 7; Drive mechanism 8; First connecting part 8.1; Second connecting part 8.2; Second guide rail 8.3; Power source 8.4. Detailed Implementation

[0025] The following specific embodiments illustrate the implementation of the present invention. Those skilled in the art can fully understand other advantages and technical effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through different specific embodiments, and the details in this specification can also be applied based on different viewpoints, with various modifications or changes made without departing from the overall design concept of the invention. It should be noted that, in the absence of conflict, the following embodiments and features in the embodiments can be combined with each other. The following exemplary embodiments of the present invention can be implemented in many different forms and should not be construed as being limited to the specific embodiments set forth herein. It should be understood that these embodiments are provided so that the disclosure of the present invention is thorough and complete, and that the technical solutions of these exemplary embodiments are fully conveyed to those skilled in the art. It should be understood that when an element is referred to as "connected" or "combined" to another element, the element can be directly connected or combined to the other element, or there may be intermediate elements. The difference is that when an element is referred to as "directly connected" or "directly combined" to another element, there are no intermediate elements. Throughout the drawings, the same reference numerals always denote the same elements. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items.

[0026] First embodiment; This invention provides a ball assembly device for an internal circulation ball screw mechanism, applicable to the ball assembly of an internal circulation ball screw mechanism with more than 100 balls, comprising: The support frame is divided into an upper support frame 2 and a lower support frame 3 by a support platform 1; The steel ball assembly mechanism 4 is vertically fixed on the upper bracket 2, with its steel ball outlet aligned with the upper opening of the nut. It relies on gravity to guide the steel ball through the support plate 1 and into the upper opening of the nut. A simpler way to implement the steel ball assembly mechanism 4 is by using a guide groove or a guide tube. The nut clamping mechanism 5 is mounted on the lower bracket 3 and aligns the upper opening of the nut with the ball outlet of the ball assembly mechanism 4. Screw support mechanism 6, which is used to support the screw end that is not engaged with the nut; Among them, the nut clamping mechanism 5 and the screw support mechanism 6 can move relative to each other, so that the nut moves up and down on the screw, and the steel balls that fall into the nut roll into the space between the nut and the screw.

[0027] Second embodiment; This invention provides a ball assembly device for an internal circulation ball screw mechanism, which is a further improvement based on the first embodiment described above. The identical parts will not be repeated here. The device includes: The nut clamping mechanism 5 is installed on the upper part of the two parallel first guide rails 7 of the lower bracket 3; The lead screw support mechanism 6 is installed on the lower part of the two parallel first guide rails 7 of the lower bracket 3; The nut clamping mechanism 5 and the lead screw support mechanism 6, at least one of them can move up and down along the first guide rail 8.

[0028] To prevent the steel balls from rolling out of the nut during one-time filling, a screw support mechanism 6 is used to move upwards; that is, the nut clamping mechanism 5 is fixedly installed on the first guide rail 8, and the screw support mechanism 6 can move up and down.

[0029] Multiple loading of steel balls does not restrict the movement of the nut clamping mechanism 5 and the screw support mechanism 6.

[0030] Preferably, the number of steel balls allowed to pass through the ball outlet is less than the number of steel balls that can be accommodated in one turn of the nut thread.

[0031] Third embodiment; refer to Figure 2 As shown, the present invention provides a ball assembly device for an internal circulation ball screw mechanism, which is a further improvement based on the first or second embodiment described above. The identical parts will not be repeated here. It also includes: The drive mechanism 8 is connected to the nut clamping mechanism 5 and the lead screw support mechanism 6 respectively, and is used to drive the nut clamping mechanism 5 and the lead screw support mechanism 6 to generate relative motion.

[0032] Continue to refer to Figure 2 As shown, the present invention provides two feasible implementations of the drive mechanism 8 in the third embodiment: In the first embodiment, the driving mechanism 8 includes: The first connecting part 8.1 is connected to the nut clamping mechanism 5; The second connecting part 8.2, and the lead screw support mechanism 6; The second guide rail 8.3 is fixed on the lower bracket 3, and one end of it is fixedly connected to the first connecting part 8.1 or the second connecting part 8.2; A power source 8.4, mounted on the second guide rail 8.3, drives the first connecting part 8.1 or the second connecting part 8.2 to move on the second guide rail 8.3, thereby causing relative movement between the nut clamping mechanism 5 and the lead screw support mechanism 6. The power source 8.4 is a motor, cylinder, or hydraulic cylinder.

[0033] In the second embodiment, the power source 8.4 is a crank-driven lead screw mechanism. Driven by the crank, the lead screw mechanism can push the first connecting part 8.1 and / or the second connecting part 8.2 to change the relative distance between them, thereby realizing the up and down movement of the nut on the lead screw.

[0034] Unless otherwise defined, all terms used herein (including technical and scientific terms) shall have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. It will also be understood that, unless explicitly defined herein, terms such as those defined in a general dictionary shall be interpreted as having the meaning consistent with their meaning in the relevant field context, and not as having an idealized or overly formal meaning.

[0035] The present invention has been described in detail above through specific embodiments and examples, but these are not intended to limit the invention. Many modifications and improvements can be made by those skilled in the art without departing from the principles of the invention, and these should also be considered within the scope of protection of the present invention.

Claims

1. An inner circulation ball screw mechanism steel ball assembly device applied to the assembly of steel balls of an inner circulation ball screw mechanism with more than 100 steel balls, characterized in that, It comprises: a support, which is divided into an upper support (2) and a lower support (3) by a support base plate (1); a steel ball assembling mechanism (4) vertically fixed on the upper support (2), the steel ball guide outlet of which is aligned with the nut upper opening, and the steel ball is guided into the nut upper opening through the support base plate (1) by gravity; a nut clamping mechanism (5) installed on the lower support (3), which aligns the nut upper opening with the steel ball guide outlet of the steel ball assembling mechanism (4); a screw rod supporting mechanism (6) for supporting the screw rod not entering the nut end; wherein the nut clamping mechanism (5) and the screw rod supporting mechanism (6) can move relatively to make the nut move up and down on the screw rod, and then the steel ball of the nut falls into the space between the nut and the screw rod.

2. The steel ball assembling device of the internal circulation ball screw mechanism according to claim 1, wherein: the nut clamping mechanism (5) is installed on the upper part of the two parallel first guide rails (7) of the lower support (3); the screw rod supporting mechanism (6) is installed on the lower part of the two parallel first guide rails (7) of the lower support (3); at least one of the nut clamping mechanism (5) and the screw rod supporting mechanism (6) can move up and down along the first guide rail (8).

3. The steel ball assembling device of the internal circulation ball screw mechanism according to claim 2, wherein: the nut clamping mechanism (5) is fixedly installed on the first guide rail (8); the screw rod supporting mechanism (6) can move up and down.

4. The steel ball assembling device of the internal circulation ball screw mechanism according to claim 2, wherein: the nut clamping mechanism (5) can move up and down; the screw rod supporting mechanism (6) is fixedly installed on the first guide rail (8).

5. The steel ball assembling device of the internal circulation ball screw mechanism according to claim 2, wherein: both the nut clamping mechanism (5) and the screw rod supporting mechanism (6) can move up and down.

6. The steel ball assembling device of the internal circulation ball screw mechanism according to any one of claims 2-5, wherein: the number of steel balls allowed to pass through the steel ball guide outlet at the same time is less than the number of steel balls that can be accommodated by one turn of the nut thread.

7. An inner-loop ball screw mechanism steel ball assembling apparatus according to any one of claims 2 to 5, wherein It further comprises: a driving mechanism (8) connected to the nut clamping mechanism (5) and the screw rod supporting mechanism (6) respectively, which is used to drive the nut clamping mechanism (5) and the screw rod supporting mechanism (6) to produce relative movement.

8. The inner-loop ball screw mechanism steel ball assembly apparatus as claimed in claim 7, wherein The driving mechanism (8) comprises: a first connecting part (8.1) connected to the nut clamping mechanism (5); a second connecting part (8.2) connected to the screw rod supporting mechanism (6); a second guide rail (8.3) fixed on the lower support (3), one end of which is fixedly connected to the first connecting part (8.1) or the second connecting part (8.2); a power source (8.4) installed on the second guide rail (8.3), which can drive the first connecting part (8.1) or the second connecting part (8.2) to move on the second guide rail (8.3), thereby causing the nut clamping mechanism (5) and the screw rod supporting mechanism (6) to produce relative movement.

9. The inner-loop ball screw mechanism steel ball assembly apparatus as claimed in claim 8, wherein: The power source (8.4) is an electric motor, an air cylinder or an oil cylinder.

10. The inner-loop ball screw mechanism steel ball assembling apparatus as claimed in claim 8, wherein: The power source (8.4) is a crank-driven screw rod mechanism.

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