Tool for machining and polishing universal joint fork

Abstract

The invention relates to the technical field of grinding equipment, and discloses a universal joint fork machining and grinding tool which comprises a base and a horizontal sliding table installed on the base, a sliding base horizontally sliding along the upper end face of the horizontal sliding table is installed at the movable end of the horizontal sliding table, a universal joint fork is arranged on the sliding base, and the upper end of the universal joint fork is a fork head end; limiting plates and a splined hole grinding assembly are installed on the sliding base, the number of the limiting plates is two, and the two limiting plates are symmetrically distributed on the two sides of the splined hole grinding assembly. The splined hole grinding assembly and the assembly hole grinding assembly are integrated on the sliding seat, the bearing hole grinding assembly is arranged above the horizontal sliding table, synchronous grinding of three key hole positions is achieved, and through sliding assembly of the splined hole grinding assembly and a splined hole, the bearing hole grinding assembly penetrates through two bearing holes in the upper end of a universal joint fork, and the grinding efficiency of the universal joint fork is improved. And the axial and radial displacement of the universal joint fork is limited, so that the grinding stability of the universal joint fork is improved on the basis of not additionally installing a clamp.

Description

Technical Field

[0001] The invention relates to the technical field of grinding equipment, in particular to a tool for machining and grinding a universal joint fork. Background Art

[0002] The universal joint fork is a typical part of automobile and agricultural machinery transmission system, and is one of the key components of the universal joint. It is fork-shaped and directly connected to the input shaft or output shaft. It is responsible for transmitting power and allowing the drive shaft to rotate flexibly within a certain angle range. Its core function is to solve the problem of axis direction changes in the transmission system, such as power transmission between a car transmission and a drive axle.

[0003] One end of the universal joint fork usually has two symmetrical fork heads with bearing holes, and the other end of the universal joint fork usually has spline holes and assembly holes that are not connected to each other. During the production and processing of the universal joint fork, it needs to be polished.

[0004] However, due to the special external shape of the universal joint fork and the inconsistent orientation of these holes, during actual grinding, it is necessary to first use a clamp to clamp and fix the universal joint fork, and then use multiple sets of grinding heads to grind these holes separately. The actual operation is rather cumbersome and delays the actual grinding efficiency. For this reason, a grinding tool is proposed, which can limit the axial and radial displacement of the universal joint fork while grinding. Summary of the Invention

[0005] In order to solve the technical problems existing in the background technology, the present invention provides a tool for machining and grinding a universal joint fork.

[0006] The present invention provides a tool for machining and polishing a universal yoke, comprising a base and a horizontal slide mounted thereon, wherein a slide seat is mounted on the movable end of the horizontal slide seat and slides horizontally along the upper end surface thereof, and the universal yoke is arranged on the slide seat and the upper end thereof is a fork end;

[0007] A limit plate and a spline hole grinding assembly are installed on the slide. There are two limit plates, which are symmetrically distributed on both sides of the spline hole grinding assembly. The distance between the limit plate and the spline hole grinding assembly is adjustable, and the spline hole grinding assembly reciprocates and rises and falls with the movement of the slide.

[0008] The lower end of the universal joint fork is slidably assembled with the spline hole grinding assembly through the spline hole and is in close contact with the inner side surface of the adjacent limit plate;

[0009] An assembly hole grinding assembly is installed on the limit plate, the grinding end of the assembly hole grinding assembly is plugged into the assembly hole at the lower end of the universal joint fork, and the assembly hole grinding assembly rotates with the movement of the slide seat;

[0010] One end of the horizontal slide is equipped with a bearing hole grinding assembly arranged parallel to it through a bracket. The axis of the bearing hole grinding assembly coincides with the center line of the two bearing holes at the upper end of the universal joint fork, and the bearing hole grinding assembly rotates with the movement of the slide.

[0011] As a further optimized solution of the present invention, the spline hole grinding assembly includes a reciprocating screw and a spline hole grinding head. One end of the reciprocating screw is rotatably connected to the slide and is installed with a first gear. The other end of the reciprocating screw extends vertically upward and is aligned with the spline hole of the universal joint fork. The spline hole grinding head is threadedly mounted on the reciprocating screw, and the spline hole grinding head is adapted to and slidably assembled with the spline hole. A first rack parallel to the end face of the horizontal slide is installed on the side of the bracket. The slide is slidably assembled with the first rack, and the first gear is meshed with the first rack.

[0012] As a further optimized solution of the present invention, a groove is provided in the middle of the slide, the upper end of the groove and the side away from the bracket are both open, a horizontally arranged support plate is installed on one side of the groove, the lower end of the reciprocating screw is rotatably connected to the support plate through a bearing, and a slide groove adapted to the first rack is provided on the other side of the groove, and the first rack slides through the slide groove.

[0013] As a further optimized solution of the present invention, the assembly hole grinding assembly includes a grinding brush roller rotatably mounted on a limit plate, one end of the grinding brush roller has a grinding brush and extends into and is centered in the assembly hole at the lower end of the universal joint fork, the other end of the grinding brush roller extends horizontally to the outside of the limit plate and is installed with a second gear, the outer peripheral surface of the second gear contacts the upper end of the horizontal slide, and the limit plate is driven to move by the slide to cause the second gear to roll along the upper end of the horizontal slide, thereby driving the grinding brush roller to drive the grinding brush to rotate and grind the inner wall of the assembly hole.

[0014] As a further optimized solution of the present invention, the upper end surface of the horizontal slide is installed with symmetrically distributed guide plates, and the two sides of the slide are respectively slidably connected with the inner side surfaces of adjacent guide plates. The upper end surface of the guide plate is installed with a second rack, and the second rack is meshed with the lower end outer edge of the second gear.

[0015] As a further optimized solution of the present invention, active cavities are opened inside both sides of the slide and distance adjustment components are installed in the cavities. Active grooves connected to adjacent active cavities are opened on both sides of the upper end surface of the slide. The active end of the distance adjustment component extends into the active groove and is fixedly connected to the bottom of the limit plate.

[0016] As a further optimized solution of the present invention, the distance adjustment assembly includes a fixed rod horizontally fixed in the movable cavity, a movable block and a spring are slidably sleeved on the fixed rod, the upper end of the movable block extends into the movable groove and is fixed to the bottom of the limit plate, and the two ends of the spring are respectively fixed to the movable block and the side wall of the movable cavity.

[0017] As a further optimized solution of the present invention, anti-slip sheets are installed on the opposite surfaces of the two limit plates, and the anti-slip sheets are in close contact with the outer surface of the lower end of the universal joint fork.

[0018] As a further optimized solution of the present invention, the upper end face of the slide is installed with a limit support plate located between the two limit plates, the upper end face of the limit support plate has a limit groove adapted to the lower end of the universal joint fork, and a through hole connected to the spline hole is opened in the middle of the limit groove, and the lower end of the spline hole grinding assembly is movably arranged in the through hole.

[0019] As a further optimized solution of the present invention, the horizontal slide includes an electric lead screw and a slider located in its housing. The electric lead screw is rotatably installed in the housing and one end is the input end and is driven by a motor. The slider is threadedly mounted on the electric lead screw. A sliding groove parallel to the bearing hole grinding assembly is provided on the upper end surface of the housing. The upper end of the slider extends into the slide groove and is fixed to the bottom of the slide seat. The shaft end of the bearing hole grinding assembly is connected to the input end of the electric lead screw through a belt and a pulley.

[0020] The tooling for machining and polishing the universal joint fork proposed in the present invention has the following beneficial effects:

[0021] (1) By integrating the spline hole grinding assembly and the assembly hole grinding assembly on the slide, and arranging the bearing hole grinding assembly above the horizontal slide, the three key hole positions can be simultaneously ground. Moreover, by sliding the spline hole grinding assembly with the spline hole, and combining the bearing hole grinding assembly to penetrate the two bearing holes at the upper end of the universal joint fork, the axial and radial displacement of the universal joint fork is limited, thereby improving the grinding stability of the universal joint fork without the need for additional fixtures;

[0022] (2) When the slide moves horizontally with the horizontal slide, the spline hole grinding head is automatically raised and lowered along the reciprocating screw to grind the inner wall of the spline hole through the meshing transmission of the first gear and the first rack; the grinding brush roller is meshed with the second rack on the guide plate through the second gear, and rotates synchronously during the movement of the slide to perform 360° rotation grinding on the assembly hole; the bearing hole grinding assembly is linked to the electric screw through belt drive to grind the fork head bearing hole; the three-station collaborative operation is realized, and the entire grinding process can be completed with a single clamping, which reduces the number of clamping times and processing time compared with traditional processes, and significantly improves production efficiency.

[0023] (3) The distance adjustment components on both sides of the slide form an elastic clamping structure through a fixed rod, a movable block and a spring. The spacing between the limit plates can be adaptively adjusted according to the external dimensions of the universal joint fork to avoid deformation of the workpiece caused by rigid clamping. In addition, the anti-slip sheet on the opposite side of the limit plate is made of high-friction rubber material to provide a stable clamping force. Combined with the limit groove of the limit support plate, the axial displacement and radial runout of the universal joint fork can be controlled, which not only ensures the stability of the workpiece during the grinding process, but also effectively protects the thin-walled fork body from damage, thereby improving the actual production qualification rate;

[0024] (4) Both the spline hole grinding assembly and the assembly hole grinding assembly adopt a passive transmission design of "moving driven rotation", which does not require an additional motor drive. For example, the lifting power of the spline hole grinding head comes from the engagement of the first gear and the first rack when the slide moves horizontally, and the rotation power of the grinding brush roller comes from the engagement of the second gear and the second rack when the slide moves. This design converts the single kinetic energy of the horizontal slide into the compound motion of multiple components, simplifying the mechanical structure while reducing the energy consumption of the entire machine. It is more energy-efficient than traditional hydraulic drive tooling and is in line with the concept of green manufacturing.

[0025] Additional aspects and advantages of the present invention will be set forth in part in the description which follows and, in part, will be obvious from the description which follows, or may be learned by practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a front structural schematic diagram of the present invention;

[0027] Figure 2 It is a front cross-sectional structural schematic diagram of the horizontal slide table of the present invention;

[0028] Figure 3 This is a schematic diagram of a first cross-sectional view of the side surface of the slide seat of the present invention;

[0029] Figure 4 This is a second cross-sectional structural diagram of the side surface of the slide seat of the present invention;

[0030] Figure 5 It is a structural schematic diagram of the reset assembly of the present invention;

[0031] Figure 6 It is a schematic diagram of the top structure of the slide seat of the present invention.

[0032] Description of the drawings: 1. Base; 2. Horizontal slide; 21. Electric screw; 22. Slider; 3. Slide seat; 4. Limit plate; 5. Universal joint fork; 6. Assembly hole grinding assembly; 61. Grinding brush roller; 62. Second gear; 7. Spline hole grinding assembly; 71. Reciprocating screw; 72. Spline hole grinding head; 8. Bracket; 9. Bearing hole grinding assembly; 10. First rack; 11. First gear; 12. Guide plate; 13. Second rack; 14. Distance adjustment assembly; 141. Fixed rod; 142. Movable block; 143. Spring; 15. Limit support plate; 16. Anti-slip sheet. DETAILED DESCRIPTION

[0033] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar symbols throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention, and are not to be construed as limiting the present invention.

[0034] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0035] like Figure 1 and Figure 2 As shown, a tool for machining and polishing a universal yoke fork comprises a base 1 and a horizontal slide 2 mounted thereon, a slide seat 3 is mounted on the movable end of the horizontal slide 2 and slides horizontally along its upper end surface, a universal yoke fork 5 is arranged on the slide seat 3 and the upper end thereof is a fork end;

[0036] A limit plate 4 and a spline hole grinding assembly 7 are installed on the slide 3. There are two limit plates 4, which are symmetrically distributed on both sides of the spline hole grinding assembly 7. The distance between the limit plates 4 and the spline hole grinding assembly 7 is adjustable, and the spline hole grinding assembly 7 reciprocates and rises and falls with the movement of the slide 3.

[0037] The lower end of the universal joint fork 5 is slidably assembled with the spline hole grinding assembly 7 through the spline hole and is in close contact with the inner side surface of the adjacent limit plate 4;

[0038] The limiting plate 4 is provided with an assembly hole grinding assembly 6, the grinding end of which is plugged into the assembly hole at the lower end of the universal joint fork 5, and the assembly hole grinding assembly 6 rotates along with the movement of the slide 3;

[0039] A bearing hole grinding assembly 9 is mounted parallel to and arranged above the horizontal slide 2 via a bracket 8. The axis of the bearing hole grinding assembly 9 coincides with the line connecting the centers of the two bearing holes at the upper end of the universal joint fork 5, and the bearing hole grinding assembly 9 rotates along with the movement of the slide 3.

[0040] To address the problem of low grinding efficiency of multi-hole positions of the yoke, this tooling realizes synchronous processing through a multi-component integrated design. The sliding assembly of the spline hole grinding component 7 and the spline hole can limit the radial displacement of the yoke, and the assembly hole grinding component 6 and the bearing hole grinding component 9 can limit the axial displacement of the yoke, thereby realizing the clamping of the yoke by the grinding component without the need for additional fixtures, thereby improving the convenience of operation.

[0041] The adjustable spacing structure between the limit plate 4 and the spline hole grinding assembly 7 can adapt to workpieces of different sizes and can further improve the stability of the workpiece. When the slide 3 moves horizontally, the spline hole grinding assembly 7 is synchronously lifted and lowered by the reciprocating screw 71 to achieve full-stroke grinding of the inner wall of the spline hole. The assembly hole grinding assembly 6 and the bearing hole grinding assembly 9 rotate as the slide moves, and perform 360° grinding on the assembly hole and the bearing hole respectively. The three major hole positions can be processed in a single clamping, which can effectively improve the actual grinding efficiency compared with traditional step-by-step grinding.

[0042] Specifically, if Figure 3 As shown, the spline hole grinding assembly 7 includes a reciprocating screw 71 and a spline hole grinding head 72. One end of the reciprocating screw 71 is rotatably connected to the slide 3 and is installed with a first gear 11. The other end of the reciprocating screw 71 extends vertically upward and is aligned with the spline hole of the universal joint fork 5. The spline hole grinding head 72 is threadedly mounted on the reciprocating screw 71, and the spline hole grinding head 72 is adapted to the spline hole and slidably assembled. A first rack 10 parallel to the upper end surface of the horizontal slide 2 is installed on the side of the bracket 8. The slide 3 is slidably assembled with the first rack 10, and the first gear 11 is meshed with the first rack 10.

[0043] By converting the linear motion of the horizontal slide 2 into rotational motion, when the slide 3 moves, the first gear 11 rolls along the first rack 10, driving the reciprocating screw 71 to rotate, causing the spline hole grinding head 72 to move back and forth along the screw axis to ensure uniform grinding of the inner wall of the spline hole;

[0044] The outer surface of the spline hole grinding head 72 has a diamond coating with a hardness of HV3000. Its wear resistance is several times that of traditional grinding wheels, which can meet the needs of high-precision grinding. In addition, a stopper is removably installed on the upper optical axis end of the reciprocating screw 71. By removing the stopper, 72 can be taken out from bottom to top and replaced.

[0045] Furthermore, if Figure 3As shown, a groove is formed in the middle of the slide 3, and the upper end of the groove and the side away from the bracket 8 are both open. A horizontal support plate is installed on one side of the groove, and the lower end of the reciprocating screw 71 is rotatably connected to the support plate through a bearing. A slide groove adapted to the first rack 10 is formed on the other side of the groove, and the first rack 10 slides through the slide groove;

[0046] The groove structure provides installation space for the reciprocating screw 71, and the bearing support ensures smooth rotation of the screw. The matching accuracy of the slide groove and the first rack 10 is H7 / g6, which limits the lateral deviation of the slide 3 during movement and ensures the coaxiality of the spline hole grinding head 72 and the spline hole.

[0047] Specifically, if Figure 3 and Figure 4 As shown, the assembly hole grinding assembly 6 includes a grinding brush roller 61 rotatably mounted on the limit plate 4, one end of the grinding brush roller 61 has a grinding brush and extends into the assembly hole at the lower end of the universal joint fork 5 and is aligned, the other end of the grinding brush roller 61 horizontally extends to the outside of the limit plate 4 and is installed with a second gear 62, the outer peripheral surface of the second gear 62 is in contact with the upper end of the horizontal slide 2, and the limit plate 4 is driven to move by the slide 3 so that the second gear 62 rolls along the upper end of the horizontal slide 2, thereby driving the grinding brush roller 61 to drive the grinding brush to rotate and grind the inner wall of the assembly hole;

[0048] The grinding brush roller 61 realizes self-rotation through friction transmission between the second gear 62 and the surface of the horizontal slide 2 (the rotation speed is proportional to the slide movement speed). For example, when the slide movement speed is 30 mm / s, the diameter of the second gear 62 is 20 mm, and the rotation speed of the grinding brush roller 61 reaches 90 r / min. The assembly hole is spirally ground with a coverage rate of 100%. The grinding brush roller 61 is a nylon grinding brush (hardness 80 Shore A), which can effectively remove burrs in the hole without damaging the hole wall.

[0049] Furthermore, the upper end surface of the horizontal slide 2 is equipped with symmetrically distributed guide plates 12, and both sides of the slide 3 are slidably connected to the inner side surfaces of adjacent guide plates 12. The upper end surface of the guide plate 12 is equipped with a second rack 13, and the second rack 13 is meshed with the lower end outer edge of the second gear 62;

[0050] The sliding fit between the guide plate 12 and the slide 3 (clearance 0.2-0.3mm) provides precise guidance, and the meshing transmission between the second rack 13 and the second gear 62 ensures the stable rotation speed of the grinding brush roller 61. For example, when there is a ±2° deviation in the movement path of the slide, the guide plate 12 can correct the slide trajectory, and at the same time, the second rack 13 drives the second gear 62 to maintain constant rotation to ensure the consistency of the assembly hole grinding.

[0051] Specifically, if Figure 4As shown, movable cavities are provided on both sides of the slide 3 and distance adjustment components 14 are installed in the cavities. Movable grooves communicating with adjacent movable cavities are provided on both sides of the upper end surface of the slide 3. The movable ends of the distance adjustment components 14 extend into the movable grooves and are fixedly connected to the bottom of the limit plate 4.

[0052] The distance adjustment assembly 14 can adapt to the width change of the universal joint fork 5, so that the limit plate 4 maintains a constant clamping force on the workpiece, avoiding deformation of the fork body caused by rigid clamping.

[0053] Further, if Figure 5 As shown, the distance adjustment assembly 14 includes a fixed rod 141 horizontally fixedly arranged in the movable cavity, and a movable block 142 and a spring 143 are slidably mounted on the fixed rod 141. The upper end of the movable block 142 extends into the movable groove and is fixed to the bottom of the limit plate 4. The two ends of the spring 143 are respectively fixed to the movable block 142 and the side wall of the movable cavity;

[0054] The fixed rod 141 limits the moving direction of the movable block 142 (only horizontal sliding), and the spring 143 is pre-compressed by 5mm to provide a certain initial clamping force. When the width of the workpiece changes, the movable block 142 slides along the fixed rod 141, and the spring 143 is compressed or extended to maintain the stable clamping of the workpiece by the limit plate 4. At the same time, it allows the workpiece to have a slight vibration attenuation during the grinding process (vibration amplitude <0.5mm), thereby improving processing stability.

[0055] Specifically, if Figure 3-Figure 5 As shown, anti-slip sheets 16 are installed on the opposite surfaces of the two limit plates 4, and the anti-slip sheets 16 are in close contact with the outer surface of the lower end of the universal joint fork 5;

[0056] The anti-slip sheet 16 is made of nitrile rubber (surface roughness Ra12.5μm) with a friction coefficient of 0.6. It can provide a maximum static friction force of 150N to prevent the workpiece from sliding during the grinding process. For example, when the grinding torque reaches 5N·m, the anti-slip sheet 16 can completely suppress the rotation of the workpiece, ensuring that the bearing hole grinding assembly 9 is coaxial with the hole axis, avoiding waste caused by eccentric grinding.

[0057] Specifically, if Figure 2-Figure 4 As shown, the upper end surface of the slide 3 is installed with a limit support plate 15 located between the two limit plates 4. The upper end surface of the limit support plate 15 has a limit groove adapted to the lower end of the universal joint fork 5, and a through hole connected to the spline hole is opened in the middle of the limit groove. The lower end of the spline hole grinding assembly 7 is movably arranged in the through hole;

[0058] The upper end of the limiting groove of the limiting support plate 15 is lower than the assembly hole of the universal joint fork 5, which limits the axial displacement of the universal joint fork 5. The through hole diameter is 0.5 mm larger than the spline hole grinding head 72 to avoid interference. During the spline hole grinding process, the limiting support plate 15 supports the lower end of the workpiece to ensure grinding accuracy.

[0059] Specifically, if Figure 1 and Figure 2 As shown, the horizontal slide 2 includes an electric screw 21 and a slider 22 located in its housing. The electric screw 21 is rotatably installed in the housing and one end is the input end and is driven by a motor. The slider 22 is threadedly mounted on the electric screw 21. The upper end surface of the housing is provided with a sliding groove parallel to the bearing hole grinding assembly 9. The upper end of the slider 22 extends into the sliding groove and is fixed to the bottom of the slide 3. The shaft end of the bearing hole grinding assembly 9 is connected to the input end of the electric screw 21 through a belt and a pulley.

[0060] The bearing hole grinding assembly 9 includes a transmission shaft and a bearing hole grinding brush roller (nylon grinding brush). The transmission shaft is rotatably mounted on the upper end of 8. One end of the transmission shaft is connected to the input end of the electric lead screw 21 through a belt and a pulley. The other end of the transmission shaft is connected to the optical axis end of the bearing hole grinding brush roller through a coupling. The bristle end of the bearing hole grinding brush roller passes through the two bearing holes of the universal joint fork. When the electric lead screw 21 is driven to rotate by the motor, the bearing hole grinding brush roller can rotate synchronously, thereby grinding the two bearing holes at the upper end of the universal joint fork.

[0061] The driving accuracy of the electric screw 21 reaches 0.01mm / revolution. The belt drive ratio is 1:1, so that the rotation speed of the bearing hole grinding component 9 is synchronized with the sliding seat movement speed. For example, when the screw speed is 100r / min, the sliding seat movement speed is 50mm / min, and the bearing hole grinding component 9 speed is 100r / min, realizing the precise matching of feed and grinding speed, ensuring the uniform surface roughness of the bearing hole.

[0062] It should be noted that the sides of the slide 3 close to the bracket 8 and away from the bracket 8 are both equipped with detachable enclosures, which can collect fallen waste chips for convenient centralized cleaning.

[0063] The tooling for machining and polishing a universal joint fork provided by the present invention has the following operating procedures:

[0064] In the initial state, the slide 3 is at the end of the horizontal slide 2 away from the bracket 8. The two limit plates 4 are moved outward, and then the universal joint fork 5 is inserted between the two limit plates 4. The lower end of the universal joint fork 5 is plugged into the limit groove of the limit support plate 15. The spline hole grinding assembly 7 passes through the spline hole of the universal joint fork 5. The limit plate 4 is reset under the action of the distance adjustment assembly 14, so that the grinding end of the assembly hole grinding assembly 6 is inserted into the assembly hole, and the preliminary clamping is completed;

[0065] Start the motor of the horizontal slide 2, and the motor drives the electric screw 21 and the bearing hole grinding assembly 9 to rotate synchronously. The electric screw 21 drives the slider 22 to move horizontally, so that the slider 22 drives the slide 3 and the universal joint fork 5 thereon to approach the bracket 8, so that the first gear 11 rolls along the first rack 10 and drives the reciprocating screw 71 to rotate. The reciprocating screw 71 is used to drive the spline hole grinding head 72 to move back and forth to grind the inner wall of the spline hole of the universal joint fork 5 back and forth. The slide 3 also drives the limiting plate 4 and the grinding brush roller 61 and the second gear 62 thereon to move. The second gear 62 rolls along the second rack 13 and drives the grinding brush roller 61 to rotate, so that the nylon brush roller at the grinding end of the grinding brush roller 61 rotates in the assembly hole, thereby grinding the inner wall of the assembly hole.

[0066] As the slider 22 continues to move, the universal joint fork 5 gradually approaches the bearing hole grinding assembly 9, and the fork head at the upper end of the universal joint fork 5 is sleeved on the bearing hole grinding assembly 9 through the bearing hole, while the bearing hole grinding assembly 9 is on the rotating turntable, thereby completing the grinding of the inner wall of the bearing hole;

[0067] When the slider 22 moves to the end of the horizontal slide 2, it automatically resets to the initial position and pauses, and the polished universal joint fork 5 can be removed and replaced.

[0068] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A tool for machining and polishing a universal joint fork, comprising a base (1) and a horizontal slide (2) mounted thereon, wherein a slide seat (3) is mounted on the movable end of the horizontal slide (2) and slides horizontally along its upper end surface, and a universal joint fork (5) is arranged on the slide seat (3) and the upper end of the universal joint fork is a fork end, characterized in that: A limit plate (4) and a spline hole grinding assembly (7) are installed on the slide (3). The number of the limit plates (4) is two, and the two limit plates (4) are symmetrically distributed on both sides of the spline hole grinding assembly (7). The spacing between the limit plates (4) and the spline hole grinding assembly (7) is adjustable, and the spline hole grinding assembly (7) reciprocates and rises and falls with the movement of the slide (3); The lower end of the universal joint fork (5) is slidably assembled with the spline hole grinding assembly (7) through the spline hole and is in close contact with the inner side surface of the adjacent limit plate (4); An assembly hole grinding assembly (6) is installed on the limit plate (4), the grinding end of the assembly hole grinding assembly (6) is plugged into the assembly hole at the lower end of the universal joint fork (5), and the assembly hole grinding assembly (6) rotates along with the movement of the slide seat (3); One end of the horizontal slide (2) is provided with a bearing hole grinding assembly (9) arranged parallel to the upper side thereof via a bracket (8). The axis of the bearing hole grinding assembly (9) coincides with the line connecting the centers of the two bearing holes at the upper end of the universal joint fork (5), and the bearing hole grinding assembly (9) rotates along with the movement of the slide (3).

2. A tool for machining and polishing a universal joint fork according to claim 1, characterized in that: The spline hole grinding assembly (7) includes a reciprocating screw (71) and a spline hole grinding head (72), one end of the reciprocating screw (71) is rotatably connected to the slide (3) and is installed with a first gear (11), the other end of the reciprocating screw (71) extends vertically upward and is aligned with the spline hole of the universal joint fork (5), the spline hole grinding head (72) is threadedly mounted on the reciprocating screw (71), and the spline hole grinding head (72) is adapted to the spline hole and slidably assembled, the side of the bracket (8) is installed with a first rack (10) parallel to the upper end surface of the horizontal slide (2), the slide (3) is slidably assembled with the first rack (10), and the first gear (11) is meshed with the first rack (10).

3. A tool for machining and polishing a universal joint fork according to claim 2, characterized in that: A groove is provided in the middle of the slide seat (3), the upper end of the groove and the side away from the bracket (8) are both open, a horizontally arranged support plate is installed on one side of the groove, the lower end of the reciprocating screw (71) is rotatably connected to the support plate through a bearing, and a slide groove adapted to the first rack (10) is provided on the other side of the groove, and the first rack (10) slides through the slide groove.

4. The tool for machining and polishing a universal joint fork according to claim 1, characterized in that: The assembly hole grinding assembly (6) includes a grinding brush roller (61) rotatably mounted on a limit plate (4), one end of the grinding brush roller (61) has a grinding brush and extends into the assembly hole at the lower end of the universal joint fork (5) and is aligned, the other end of the grinding brush roller (61) horizontally extends to the outside of the limit plate (4) and is mounted with a second gear (62), the outer peripheral surface of the second gear (62) contacts the upper end of the horizontal slide (2), and the limit plate (4) is driven to move by the slide (3) so that the second gear (62) rolls along the upper end of the horizontal slide (2), thereby driving the grinding brush roller (61) to drive the grinding brush to rotate and grind the inner wall of the assembly hole.

5. The tool for machining and polishing a universal joint fork according to claim 4, characterized in that: The upper end surface of the horizontal slide (2) is equipped with symmetrically distributed guide plates (12), and both sides of the slide seat (3) are respectively slidably connected to the inner side surfaces of adjacent guide plates (12). The upper end surface of the guide plate (12) is equipped with a second rack (13), and the second rack (13) is meshedly connected with the outer edge of the lower end of the second gear (62).

6. The tool for machining and polishing a universal joint fork according to claim 1, characterized in that: Active cavities are provided inside both sides of the slide (3) and distance adjustment components (14) are installed in the cavities. Active grooves communicating with adjacent active cavities are provided on both sides of the upper end surface of the slide (3). The active ends of the distance adjustment components (14) extend into the active grooves and are fixedly connected to the bottom of the limit plate (4).

7. A tool for machining and polishing a universal joint fork according to claim 6, characterized in that: The distance adjustment assembly (14) includes a fixed rod (141) fixedly arranged horizontally in the movable cavity, a movable block (142) and a spring (143) are slidably sleeved on the fixed rod (141), the upper end of the movable block (142) extends into the movable groove and is fixed to the bottom of the limit plate (4), and the two ends of the spring (143) are respectively fixed to the movable block (142) and the side wall of the movable cavity.

8. The tool for machining and polishing a universal joint fork according to claim 1, characterized in that: Anti-slip sheets (16) are installed on the opposite surfaces of the two limiting plates (4), and the anti-slip sheets (16) are in close contact with the outer surface of the lower end of the universal joint fork (5).

9. The tool for machining and polishing a universal joint fork according to claim 1, characterized in that: The upper end surface of the slide seat (3) is provided with a limiting support plate (15) located between the two limiting plates (4). The upper end surface of the limiting support plate (15) has a limiting groove adapted to the lower end of the universal joint fork (5), and a through hole connected to the spline hole is provided in the middle of the limiting groove. The lower end of the spline hole grinding assembly (7) is movably arranged in the through hole.

10. A tool for machining and polishing a universal joint fork according to any one of claims 1 to 9, characterized in that: The horizontal slide (2) includes an electric lead screw (21) and a slider (22) located in its housing. The electric lead screw (21) is rotatably mounted in the housing and one end of the lead screw is an input end and is driven by a motor. The slider (22) is threadedly mounted on the electric lead screw (21). The upper end surface of the housing is provided with a sliding groove parallel to the bearing hole grinding assembly (9). The upper end of the slider (22) extends into the sliding groove and is fixed to the bottom of the slide seat (3). The shaft end of the bearing hole grinding assembly (9) is connected to the input end of the electric lead screw (21) through a belt and a pulley.

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