Ball screw pair flat key shearing strength testing device

Abstract

The utility model relates to test equipment, and particularly discloses a device for testing the shear strength of a flat key of a ball screw pair. The ball screw pair flat key shear strength testing device comprises a nut clamping seat, an adaptive tool and a load applying assembly, the adaptive tool is provided with a nut adaptive part and a loading part, the nut adaptive part comprises a nut mounting hole, the hole wall of the nut mounting hole is provided with a bearing groove, and the loading part is provided with a loading groove. The bearing groove extends to the opening end of the nut mounting hole in the axial direction; the load applying assembly comprises a torque applying unit and a torque detecting unit, the torque applying unit is used for being matched with the loading part and applying torque to the adaptive tool, and the torque detecting unit is used for detecting the torque transmitted between the torque applying unit and the adaptive tool. The device for testing the shearing strength of the flat key of the ball screw pair can be used for applying torque to the flat key and measuring the shearing strength of the flat key, and has the advantages of simple structure and convenience in operation.

Description

Technical Field

[0001] The utility model relates to a test device, in particular to a flat key shear strength test device for a ball screw pair. Background Technique

[0002] The lead screw is a mechanical transmission mechanism that can convert between rotary motion and linear motion. As shown in, it usually includes a screw rod 1 and a nut 2, and has the characteristics of high precision, reversibility, and high efficiency. It is widely used in various industrial equipment and precision instruments. Figure 1 When the lead screw is working, an external drive unit is connected to the screw rod 1, and the nut 2 is connected to the slider through a flat key 21. When the screw rod 1 rotates, the nut 2 cannot rotate under the limitation of the slider, and the rotational motion of the screw rod 1 is converted into the linear motion of the nut 2.

[0003] An external load is connected to the slider and transmitted to the nut through the flat key. The shear strength of the flat key determines the working load of the lead screw. Therefore, it is necessary to test the shear strength of the flat key in the lead screw pair to provide effective data for production, processing, assembly, and basic research.

[0004] Summary of the Invention

[0005] The technical problem to be solved by the utility model is to provide a flat key shear strength test device for a ball screw pair, which can apply torque to the flat key and measure the shear strength of the flat key, and has the advantages of simple structure and convenient operation.

[0006] To solve the above technical problem, the technical solution provided by the utility model is as follows: A flat key shear strength test device for a ball screw pair, including a nut clamping seat, an adapter tooling, and a load application component. The adapter tooling is provided with a nut adapter part and a loading part. The nut adapter part includes a nut installation hole, and a bearing groove is opened on the hole wall of the nut installation hole. The bearing groove extends axially to the opening end of the nut installation hole;

[0007] The load application component includes a torque application unit and a torque detection unit. The torque application unit is used to cooperate with the loading part and apply torque to the adapter tooling, and the torque detection unit is used to detect the torque transmitted between the torque application unit and the adapter tooling.

[0008] During the test, the nut is fixed on the nut clamping seat, and the adaptor tooling is sleeved on the nut. The nut installation hole is matched with the nut, and the flat key on the nut is inserted into the bearing groove. The torque application unit applies torque to the adaptor tooling, and the torque is indirectly applied to the flat key through the bearing groove. The torque detection unit can detect the torque value, thereby obtaining the shear force borne by the flat key. The maximum bearing capacity of the flat key can be obtained by gradually increasing the torque to break the flat key, or the bearing capacity of the flat key can be tested by applying a specific designed load to check whether it meets the standard.

[0009] The flat key shear strength test device for the ball screw pair of the present application has the advantages of simple structure and convenient operation.

[0010] Preferably, the nut clamping seat includes a bench vice.

[0011] Preferably, the load application assembly includes a torque wrench.

[0012] Preferably, the torque application unit includes a rotary drive and a transition joint. The transition joint is matched with the loading part of the adaptor tooling. The torque detection unit includes a torque sensor arranged between the rotary drive and the transition joint.

[0013] Preferably, the loading part includes a loading hole arranged on the adaptor tooling.

[0014] Preferably, the loading part includes an external hexagon nut arranged on the adaptor tooling.

[0015] Preferably, a flat key accommodation groove is also formed on the inner wall of the nut installation hole. The flat key accommodation groove extends axially to the opening end of the nut installation hole. The flat key accommodation groove and the bearing groove are arranged out of phase in the circumferential direction, and the width of the flat key accommodation groove is greater than that of the bearing groove.

[0016] Since there are usually two flat keys on the nut, when the bearing groove loads one of the flat keys, the other flat key can be in the flat key accommodation groove with a larger width and is in a non-bearing state. That is, the shear strength test of the flat keys can be carried out one by one on the basis of having multiple flat keys, and the test operation is flexible and reliable. Description of the Drawings

[0017] Figure 1 is a schematic structural diagram of the lead screw;

[0018] Figure 2 is a schematic structural diagram of the flat key shear strength test device for the ball screw pair of this embodiment;

[0019] Figure 3 is a schematic structural diagram of the flat key shear strength test device for the ball screw pair of this embodiment in the test state;

[0020] Figure 4 Schematic structural diagram of the adapter tooling in the flat key shear strength test device for the ball screw pair in this embodiment;

[0021] Figure 5 End view of the adapter tooling in the flat key shear strength test device for the ball screw pair in this embodiment. Detailed implementation manners

[0022] In order to make the objectives, technical solutions and advantages of the present utility model clearer and more understandable, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model. Embodiment

[0023] As shown in Figure 2 and Figure 3 A flat key shear strength test device for a ball screw pair includes a nut clamping seat 5, an adapter tooling 4 and a load application assembly 3. Specifically, the nut clamping seat 5 includes a bench vice.

[0024] As shown in Figure 4 and Figure 5 On the adapter tooling 4, there are a nut adapter portion and a loading portion 43. The nut adapter portion includes a nut mounting hole 42. A bearing groove 41 is formed on the hole wall of the nut mounting hole 42, and the bearing groove 41 extends axially to the opening end of the nut mounting hole 42.

[0025] The loading portion 43 includes a loading hole provided on the adapter tooling 4, or an external hexagon nut provided on the adapter tooling 4.

[0026] As shown in Figure 2 and Figure 3 The load application assembly 3 includes a torque application unit 32 and a torque detection unit 31. The torque application unit 32 is used to cooperate with the loading portion 43 and apply torque to the adapter tooling 4, and the torque detection unit 31 is used to detect the torque transmitted between the torque application unit 32 and the adapter tooling 4.

[0027] As a specific implementation manner, the load application assembly 3 includes a torque wrench.

[0028] As another specific implementation manner, the torque application unit 32 includes a rotary drive member and a transition joint. The transition joint is matched with the loading portion 43 of the adapter tooling 4, and the torque detection unit 31 includes a torque sensor provided between the rotary drive member and the transition joint.

[0029] During the test, the nut 2 is fixed on the nut clamping seat 5, and the adapter tooling 4 is sleeved on the nut 2, where the nut mounting hole 42 cooperates with the nut 2, and the flat key 21 on the nut 2 is inserted into the load-bearing groove 41. The torque application unit 32 applies torque to the adapter tooling 4, and the torque is indirectly applied to the flat key 21 through the load-bearing groove 41. The torque detection unit 31 can detect the torque value, so as to obtain the shear force borne by the flat key 21. The maximum load-bearing capacity of the flat key can be obtained by gradually increasing the torque to break the flat key 21, or the load-bearing capacity of the flat key 21 can be tested by applying a specific designed load to check whether it meets the standard.

[0030] As Figure 4 and Figure 5 shown, further, a flat key accommodation groove 44 is also formed in the hole wall of the nut mounting hole 42, and the flat key accommodation groove 44 extends axially to the open end of the nut mounting hole 42. The flat key accommodation groove 44 is arranged circumferentially offset from the load-bearing groove 41, and the width of the flat key accommodation groove 44 is greater than the width of the load-bearing groove 41.

[0031] Since there are usually two flat keys 21 on the nut, when the load-bearing groove 41 loads one of the flat keys 21, the other flat key 21 can be in the flat key accommodation groove 44 with a larger width and be in a non-load-bearing state. That is, based on the presence of multiple flat keys 21, the shear strength test of each flat key can be carried out one by one, and the test operation is flexible and reliable.

[0032] The flat key shear strength test device of the ball screw pair of the present application has the advantages of simple structure and convenient operation.

[0033] In summary, the above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims

1. A ball screw pair flat key shear strength test device, characterized in that: It includes a nut clamping seat, an adapting tool and a load applying assembly, wherein the adapting tool is provided with a nut adapting portion and a loading portion, the nut adapting portion includes a nut mounting hole, a hole wall of the nut mounting hole is provided with a bearing groove, and the bearing groove extends axially to the opening end of the nut mounting hole; The load applying assembly includes a torque applying unit and a torque detecting unit. The torque applying unit is used to cooperate with the loading part and apply torque to the adapting tooling. The torque detecting unit is used to detect the torque transmitted between the torque applying unit and the adapting tooling.

2. The ball screw pair flat key shear strength testing device according to claim 1, characterized in that: The nut clamping seat comprises a bench vise.

3. The ball screw pair flat key shear strength testing device according to claim 1, characterized in that: The load applying assembly includes a torque wrench.

4. The ball screw pair flat key shear strength testing device according to claim 1, characterized in that: The torque applying unit comprises a rotary driving member and a transition joint, the transition joint matches with the loading part of the adapting tool, and the torque detecting unit comprises a torque sensor arranged between the rotary driving member and the transition joint.

5. The ball screw pair flat key shear strength testing device according to claim 1, characterized in that: The loading part comprises a loading hole arranged on the adapting tooling.

6. The ball screw pair flat key shear strength testing device according to claim 1, characterized in that: The loading part comprises an external hexagonal nut arranged on the adapting tooling.

7. The ball screw pair flat key shear strength testing device according to any one of claims 1 to 6, characterized in that: The hole wall of the nut mounting hole is also provided with a flat key accommodating groove, which extends axially to the opening end of the nut mounting hole; the flat key accommodating groove and the bearing groove are staggered in the circumferential direction, and the width of the flat key accommodating groove is greater than the width of the bearing groove.

Images