Gear detection clamp

Abstract

The gear detection clamp comprises a bearing seat and a shaft sleeve, the shaft sleeve is sleeved with a first bearing and a second bearing which are embedded in the bearing seat, the upper end of the bearing seat is provided with an upper cover, the lower end of the bearing seat is provided with a lower gland, the upper end face of the outer ring of the first bearing is tightly attached to the lower end of the upper cover, and the second bearing is tightly attached to the first bearing. The upper end of the shaft sleeve extends out of the first bearing and is provided with a step portion, the lower end of the shaft sleeve extends out of the second bearing and is provided with a stud portion, the lower end face of the step portion is tightly attached to the upper end face of the inner ring of the first bearing, the stud portion is in threaded connection with a first nut, and a pressing pad is arranged between the first nut and the second bearing. The upper end face of the pressing pad is tightly attached to the lower end face of the inner ring of the second bearing. The detection clamp is suitable for detection of a shaft gear with a non-center hole as a detection reference. And by designing the rotatable structure of the shaft sleeve, the abrasion to the shaft sleeve is reduced, and the service life of the shaft sleeve is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of tooling fixtures, and more specifically, it relates to a gear detection fixture. Background Art

[0002] For existing gear detection fixtures, for shaft gears, they are directly positioned through two top holes above and below. For disk gears, they are positioned by inserting a mandrel into the inner hole of the disk gear. However, for some special shaft gears, the detection reference is the outer circle and end face of the gear, so top hole positioning cannot be used. Therefore, it is necessary to design a fixture that can use the outer circle and end face for positioning and ensure high rotational accuracy.

[0003] For the detection of non-top-hole shaft gears in the prior art, a bushing is usually directly used for detection. However, the bushing cannot rotate, resulting in wear of the bushing every time detection is carried out, with a low service life of the bushing and poor overall effect. Accordingly, the utility model provides a gear detection fixture. Summary of the Utility Model

[0004] The purpose of the utility model is to overcome the deficiencies in the above-mentioned prior art and provide a gear detection fixture.

[0005] A gear detection fixture according to the utility model includes a bearing seat and a bushing arranged coaxially. A first bearing embedded in the bearing seat and arranged above and a second bearing arranged below are sleeved on the bushing. The upper end of the bearing seat is fixedly connected with an upper cover, and the lower end is fixedly connected with a lower pressing cover. The upper end face of the outer ring of the first bearing abuts against the lower end of the upper cover. The second bearing abuts against the first bearing, and the lower end face of the outer ring of the second bearing abuts against the upper end of the lower pressing cover. The upper end of the bushing extends out of the first bearing and has a stepped portion, and the lower end extends out of the second bearing and has a stud portion. The lower end face of the stepped portion abuts against the upper end face of the inner ring of the first bearing. A first nut is threadedly connected to the stud portion. A pressing pad sleeved on the bushing is arranged between the first nut and the second bearing. The upper end face of the pressing pad abuts against the lower end face of the inner ring of the second bearing, and the lower end face abuts against the first nut.

[0006] The utility model is further arranged such that a second nut is also threadedly connected to the stud portion, and the second nut abuts against the first nut.

[0007] In summary, the utility model has the following beneficial effects:

[0008] 1. It can be applied to the detection of shaft gears with non-top holes as the detection reference.

[0009] 2. By designing the rotatable structure of the bushing, the wear of the bushing is reduced, and the service life of the bushing is improved. Brief Description of the Drawings

[0010] Figure 1 is a schematic diagram of the overall structure of the present utility model. Detailed Description of the Preferred Embodiments

[0011] In order to enable those skilled in the art to better understand the technical solutions of the present utility model, the preferred implementation embodiments of the present utility model will be described below in conjunction with specific embodiments. However, it should be understood that these descriptions are only for further explaining the features and advantages of the present utility model, rather than limiting the patent requirements of the present utility model. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present utility model.

[0012] The present utility model will be further described below in conjunction with the drawings and preferred embodiments.

[0013] Embodiment 1

[0014] Refer to Figure 1 As shown, a gear detection fixture involved in this embodiment includes a bearing seat 1 and a bushing 2 arranged coaxially. A first bearing 3 embedded in the bearing seat 1 and arranged above and a second bearing 4 arranged below are sleeved on the bushing 2. An upper cover 5 is fixedly connected to the upper end of the bearing seat 1, and a lower pressing cover 6 is fixedly connected to the lower end. The upper end face of the outer ring of the first bearing 3 abuts against the lower end of the upper cover 5. The second bearing 4 abuts against the first bearing 3. The lower end face of the outer ring of the second bearing 4 abuts against the upper end of the lower pressing cover 6. The upper end of the bushing 2 extends out of the first bearing and has a stepped portion 21, and the lower end extends out of the second bearing and has a stud portion 22. The lower end face of the stepped portion 21 abuts against the upper end face of the inner ring of the first bearing 3. A first nut 7 is threadedly connected to the stud portion 22. A pressure pad 8 sleeved on the bushing is provided between the first nut 7 and the second bearing 4. The upper end face of the pressure pad 8 abuts against the lower end face of the inner ring of the second bearing 4, and the lower end face abuts against the first nut 7.

[0015] In this embodiment, the inner hole of the bearing housing 1 is a completely through hole. This makes it easier to grind the inner hole, thereby ensuring that the inner hole has higher dimensional accuracy and cylindricity. The upper cover 5 is fixed on top of the bearing housing 1. The first bearing 3 and the second bearing 4 are respectively placed into the inner hole of the bearing housing 1. The upper end face of the outer ring of the first bearing 3 closely abuts against the lower end of the upper cover 5. The second bearing 4 closely abuts against the first bearing 3. The lower pressing cover 6 is fixed at the lower end of the bearing housing 1. At the same time, the upper end of the lower pressing cover 6 closely abuts against the lower end face of the outer ring of the second bearing 4, so that the outer rings of the first bearing 3 and the second bearing 4 are completely fixed within the bearing housing 1. The bushing 2 is directly inserted into the inner holes of the first bearing 3 and the second bearing 4. The lower end face of the stepped portion 21 of the bushing 2 closely abuts against the upper end face of the inner ring of the first bearing 3. The pressure pad 8 is sleeved on the bushing 2. The upper end face of the pressure pad 8 closely abuts against the lower end face of the inner ring of the second bearing 4. The first nut 7 is tightened on the stud portion 22 of the bushing 2. At the same time, the upper end face of the first nut 7 closely abuts against the lower end face of the pressure pad 8, thereby completely fixing the bushing 2 within the inner rings of the first bearing 3 and the second bearing 4 respectively.

[0016] Among them, the inner hole and the upper end face of the bushing 2 are ground by precision external cylindrical grinding and have high precision. The outer circle of the shaft gear 100 and the inner hole of the bushing 2 have a small clearance fit. The end face of the shaft gear 100 directly abuts against the upper end face of the bushing 2, thereby playing a role in precisely positioning the shaft gear 100. After the shaft gear 100 is installed in the bushing 2, when the shaft gear 100 rotates, it can drive the bushing 2 to rotate, avoiding wear on the bushing 2 and improving the service life of the bushing 2.

[0017] Embodiment 2

[0018] See Figure 1 As shown, a gear detection fixture involved in this embodiment is further provided, on the basis of Embodiment 1, that a second nut 9 is also threadedly connected to the stud portion 22, and the second nut 9 closely abuts against the first nut 7.

[0019] In this embodiment, by providing the second nut 9 that closely abuts against the first nut 7, it is used for nut locking prevention to prevent the first nut 7 from loosening.

[0020] The gear detection fixture involved in the present utility model can be applicable to the detection of shaft gears with non-top-hole as the detection reference; and by designing the rotatable structure of the bushing, the wear on the bushing is reduced, the service life of the bushing is improved, the overall function is perfect, and the practicability is strong.

[0021] Unless otherwise specified, in this utility model, if there are terms such as "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., the indicated orientation or positional relationship is based on the actual shown orientation or positional relationship. It is only for the convenience of describing this utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the terms used to describe the orientation or positional relationship in this utility model are only for exemplary illustration and should not be construed as a limitation of this patent. For those of ordinary skill in the art, the specific meanings of the above terms can be understood in combination with the embodiments and according to the specific circumstances.

[0022] Unless otherwise clearly defined and limited, in this utility model, if there are terms such as "arranged", "connected" and "coupled", they should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in this utility model can be understood according to the specific circumstances.

[0023] The preferred specific embodiments of this utility model have been described in detail above. It should be understood that those of ordinary skill in the art can make many modifications and variations according to the concept of this utility model without creative labor. Therefore, all technical solutions that can be obtained by those skilled in the art in this technical field based on the concept of this utility model through logical analysis, reasoning or limited experiments on the basis of the prior art should be within the protection scope determined by the claims.

Claims

1. A gear detection fixture, comprising a bearing seat and a shaft sleeve arranged coaxially, and characterized in that: A first bearing and a second bearing are sleeved on the bushing. The first bearing is embedded in the bearing seat and arranged upward, and the second bearing is arranged downward. The upper end of the bearing seat is fixedly connected with an upper cover, and the lower end is fixedly connected with a lower pressing cover. The upper end face of the outer ring of the first bearing is closely attached to the lower end of the upper cover. The second bearing is closely attached to the first bearing, and the lower end face of the outer ring of the second bearing is closely attached to the upper end of the lower pressing cover. The upper end of the bushing extends out of the first bearing and has a stepped portion, and the lower end extends out of the second bearing and has a stud portion. The lower end face of the stepped portion is closely attached to the upper end face of the inner ring of the first bearing. A first nut is threadedly connected to the stud portion, and a pressing pad sleeved on the bushing is arranged between the first nut and the second bearing. The upper end face of the pressing pad is closely attached to the lower end face of the inner ring of the second bearing, and the lower end face is closely attached to the first nut.

2. The gear detection fixture according to claim 1, wherein: A second nut is also threadedly connected to the stud portion, and the second nut is closely attached to the first nut.

Images