CN205520500U - Universal joint fork facing (operation) special fixture - Google Patents

Abstract

The utility model discloses a special fixture for processing the end face of a universal joint yoke, which comprises a chuck body, a movable claw and a claw driving mechanism. There are two claws which are symmetrically distributed and connected to the chuck body. The driving mechanism is connected, and it is characterized in that: the chuck body is also provided with a block, a limit plate, and a limit block. The block is connected to the upper surface of the claw, and the claw is close to the center of the chuck body. Connected with a bump, the outer upper end of the bump is provided with a bevel, the limit plate is set at the center of the chuck body, the center of the limit plate is a circular sink, and the limit is set in the sink block, and the limit block divides the sinker into two symmetrical slots. The utility model restricts the degree of freedom of the joint fork X on the axis by adding a limit plate and a limit block on the chuck body, and connects a clamp block of a specific shape on the claw to limit the freedom of the joint fork on the Y axis High degree, so that the fork has higher coaxiality and better stability during rotary processing.

Description

A special fixture for processing the end face of the universal joint yoke

【Technical field】

The utility model relates to the technical field of mechanical processing, in particular to the technical field of a special fixture for processing the end face of a universal joint yoke.

【Background technique】

Cross shaft rigid universal joint is composed of universal joint fork, cross shaft, needle roller bearing, oil seal, bushing, bearing cover and other parts. The working principle is: one of the rotating forks drives the other fork to rotate through the cross shaft, and can swing in any direction around the center of the cross shaft at the same time. The needle rollers in needle roller bearings rotate on their own during rotation to reduce friction. The shaft connected to the input power is called the input shaft (also known as the driving shaft), and the shaft output through the universal joint is called the output shaft (also called the driven shaft). Working under the condition of an included angle between the input and output shafts, the angular velocity of the two shafts is not equal, which will cause torsional vibration of the output shaft and the transmission parts connected to it and affect the life of these parts. Because it rotates when it works, only the symmetry of each part can ensure the static balance and dynamic balance of the universal joint. However, the end face processing of universal joints is currently generally processed by turning and milling. The fixed fixture cannot guarantee that the axis of the end face of the yoke circle is consistent with the axis of rotation, and the processing error for end face chamfering is often large.

【Content of utility model】

The purpose of the utility model is to solve the problems in the prior art, and propose a special fixture for processing the end surface of the universal joint yoke, which can make the clamped joint yoke more stable and have higher coaxiality.

In order to achieve the above purpose, the utility model proposes a special fixture for processing the end face of the universal joint yoke, which includes a chuck body, a movable jaw and a jaw driving mechanism. There are two jaws that are symmetrically distributed and connected to the chuck body. The jaws are connected with the jaw driving mechanism, and it is characterized in that: the chuck body is also equipped with a clamping block, a limit plate, and a limit block, the clamping block is connected to the upper surface of the clamping jaw, and the clamping jaw is close to the clamping The central position end of the disc body is connected with a protruding block, the outer upper end of the protruding block is provided with a bevel, the limit plate is set at the center position of the chuck body, the center of the limit plate is a circular sinking groove, and the sinking groove is provided with a There is the limiting block, and the limiting block divides the sinker into two symmetrical slots.

As a preference, six evenly distributed through holes are provided on the limiting disc, threaded holes are provided on the chuck body corresponding to the through holes on the limiting disc, and the limiting disc is connected to the chuck through bolts. body.

As a preference, the upper surface of the claw is provided with fine straight teeth, the lower surface of the block is also provided with fine straight teeth, two through holes are arranged on the block, and the claw and the upper surface of the block A threaded hole is provided at the corresponding position of the through hole, and the clamping block is connected with the clamping claw by a bolt.

Preferably, the thickness of the limiting block is equal to the distance between the two inner surfaces of the yoke to be processed, and the diameter of the sinking groove on the limiting plate is greater than the distance between the two outer surfaces of the yoke to be processed.

Preferably, the thickness of the block is greater than the distance between the two outer surfaces of the fork to be processed.

Preferably, the beveled surface of the clamping block does not touch any part of the yoke to be processed, and the end surface of the protrusion is pressed against the side plate of the yoke to be processed during clamping.

Preferably, a plurality of square wrench holes are provided on the circumferential surface of the chuck body, and a bevel gear is connected inside the wrench hole, and the bevel gear is connected with the claw driving mechanism.

As a preference, the limiting block and the limiting plate are of an integral structure, and the slot on the limiting plate at the height of the limiting block is 5mm.

Beneficial effects of the utility model: the utility model limits the degree of freedom of the joint fork X on the axis by adding a limit plate and a limit block on the chuck body, and connects a specific shape of the clamping block on the jaw to limit the joint. The degree of freedom of the fork on the Y axis makes the fork have higher coaxiality and better stability during rotary processing.

The features and advantages of the utility model will be described in detail through embodiments in conjunction with the accompanying drawings.

【Description of drawings】

Fig. 1 is an axial side view of a special fixture for processing the end face of a universal joint yoke of the present invention;

Fig. 2 is a top view of a special fixture for processing the end face of the universal joint yoke of the utility model;

Fig. 3 is a schematic diagram of the structure of the fork to be processed.

In the figure: 1-Chuck body, 12-Claw, 2-Clamp block, 22-Protrusion, 221-Bevel, 3-Limiting plate, 4-Limiting block, 34-Catch slot, 4-To be processed festival fork.

【detailed description】

Referring to Fig. 1, Fig. 2 and Fig. 3, the utility model is a special fixture for processing the end face of a universal joint yoke, which includes a chuck body 1, a movable jaw 12 and a jaw driving mechanism, and there are two jaws 12 which are symmetrically distributed and connected On the chuck body, the jaws 12 are connected with the jaw driving mechanism, and the feature is that: the chuck body 1 is also provided with a clamping block 2, a limit plate 3, and a limit block 4, and the clamping block 2 is connected On the upper surface of the jaw 12, the end of the jaw 12 close to the center of the chuck body 1 is connected with a protrusion 22, the outer upper end of the protrusion 22 is provided with a bevel 221, and the limit plate 3 is arranged on the chuck body 1 center position, the center of the limiting disk 3 is a circular sinking groove, and the limiting block 4 is arranged in the sinking groove, and the limiting block 4 divides the sinking groove into two symmetrical locking grooves 34 . The limiting disc 3 is provided with six evenly distributed through holes, and the chuck body 1 is provided with threaded holes corresponding to the through holes on the limiting disc 3, and the limiting disc 3 is connected to the chuck by bolts. Disk body 1. The upper surface of the claw 12 is provided with fine straight teeth, and the lower surface of the block 2 is also provided with fine straight teeth. Two through holes are set on the block 2. The claw 12 and the block A threaded hole is provided at the corresponding position of the upper through hole, and the clamping block 2 is connected to the claw 12 by bolts. The thickness of the limiting block 4 is equal to the distance between the two inner surfaces of the yoke 5 to be processed, and the diameter of the sinking groove on the limiting disk 3 is greater than the distance between the two outer surfaces of the yoke 5 to be processed. The thickness of the block 2 is greater than the distance between the two outer surfaces of the fork 5 to be processed. The bevel 221 of the clamping block 2 does not touch any part of the yoke 5 to be processed, and the end surface of the protrusion 22 is pressed against the side plate of the yoke 5 to be processed when clamping. A plurality of square wrench holes are arranged on the circumferential surface of the chuck body 1, and a bevel gear is connected inside the wrench hole, and the bevel gear is connected with the claw 12 driving mechanism. The limiting block 4 and the limiting disc 3 are of an integral structure, and the clamping groove on the limiting disc 3 at the height of the limiting block 4 is 345mm.

The working process of the utility model:

The utility model is a special fixture for processing the end surface of the universal joint yoke. During the working process, when installing the clamp, insert the ears on both sides of the joint yoke 5 to be processed into the slots on the limit plate 3, and then use a square wrench to rotate the chuck. The square hole on the body 1 makes the claw 12 move inwardly and drives the block 2 to press the side ear of the fork 5 to be processed.

The utility model is a special fixture for processing the end face of a universal joint yoke, which limits the degree of freedom of the joint fork X on the axis by adding a limit plate and a limit block on the chuck body, and connects a special shape on the jaw. The block restricts the degree of freedom of the fork on the Y axis, so that the coaxiality of the fork is higher and the stability is better during rotary processing.

The above-mentioned embodiment is an illustration of the utility model, not a limitation of the utility model, and any scheme after a simple transformation of the utility model belongs to the protection scope of the utility model.

Claims (8)

1. a universal-joint fork Special clamp for processing end surface, including chuck body (1), movable jaw (12) and claw Drive mechanism, claw (12) has two and symmetrical is connected in chuck body, claw (12) with Claw drive mechanism is connected, it is characterised in that: also it is equipped with fixture block (2), spacing on chuck body (1) Dish (3), limited block (4), described fixture block (2) is connected to claw (12) upper surface, described claw (12) Connecting near chuck body (1) center end has projection (22), described projection (22) outer upper end to be provided with Oblique angle (221), described position-arresting disk (3) is located at chuck body (1) center, described position-arresting disk (3) Center is for being provided with described limited block (4) in circular deep gouge, deep gouge, and deep gouge is split by described limited block (4) Become two symmetrical draw-in grooves (34).

2. a kind of universal-joint fork Special clamp for processing end surface as claimed in claim 1, it is characterised in that: described limit Position dish (3) is provided with six equally distributed through holes, on described chuck body (1) and on position-arresting disk (3) Through hole correspondence position is provided with screwed hole, and described position-arresting disk (3) is bolted chuck body (1).

3. a kind of universal-joint fork Special clamp for processing end surface as claimed in claim 1, it is characterised in that: described card Pawl (12) upper surface is provided with thin straight-tooth tooth, and described fixture block (2) lower surface is again provided with thin straight-tooth tooth, Two through holes are set, described claw (12) through hole correspondence position upper with fixture block (2) on described fixture block (2) Being provided with screwed hole, described fixture block (2) is bolted claw (12).

4. a kind of universal-joint fork Special clamp for processing end surface as claimed in claim 1, it is characterised in that: described limit Position block (4) thickness is equal to the distance of joint fork (5) two medial surface to be processed, and described position-arresting disk (3) is upper heavy The diameter of groove is more than the distance of two lateral surface of joint fork (5) to be processed.

5. a kind of universal-joint fork Special clamp for processing end surface as claimed in claim 1, it is characterised in that: described card Block (2) thickness is more than the distance of two lateral surface of joint fork (5) to be processed.

6. a kind of universal-joint fork Special clamp for processing end surface as claimed in claim 1, it is characterised in that: described card The arbitrary portion of joint fork (5) to be processed, described projection during clamping are not touched in block (2) oblique angle (221) face (22) end face is pressed in joint fork (5) side plate to be processed.

7. a kind of universal-joint fork Special clamp for processing end surface as claimed in claim 1, it is characterised in that: described card Disk body (1) periphery is provided with some square driving holes, and driving hole is internally connected with angular wheel, taper Gear is connected with claw (12) drive mechanism.

8. a kind of universal-joint fork Special clamp for processing end surface as claimed in claim 1, it is characterised in that: described limit Position block (4) and position-arresting disk (3) are integrative-structures, the card on limited block (4) eminence position-arresting disk (3) Groove (34) 5mm.