Fixing clamp for shaft sleeve production and machining

Abstract

The invention relates to the technical field of fixing clamps, and discloses a fixing clamp for shaft sleeve production and machining, which comprises a base, the top surface of the base is fixedly connected with a connecting rod, the top end of the connecting rod is fixedly connected with a circular truncated cone, the lower surface of the circular truncated cone is fixedly connected with a pin shaft I, and the outer surface of the pin shaft I is rotatably connected with a bent plate; a bottom plate is fixedly connected to the bottom end of the first pin shaft, a positioning rod is installed on the top of the bent plate, a second pin shaft is rotationally connected into the bent plate, and an arc-shaped rod is rotationally connected to the outer surface of the second pin shaft. The inner shaft face of the shaft sleeve can be fixed, the outer circumferential face of the shaft sleeve can also be fixed, the positioning rod can be accurately attached to the corresponding position to fix the shaft sleeve through corresponding operation no matter the outer circumferential face or the inner circumferential face of the shaft sleeve is machined, different machining requirements are met, and the shaft sleeve machining device can be suitable for various different machining scenes and is high in practicability. The trouble that the clamp needs to be replaced due to the single fixing mode is avoided, and the applicability of the clamp is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of fixed jigs, and particularly to a fixed jig for the production and processing of bushings. Background Art

[0002] With the rapid development of modern industry, bushings are increasingly widely used in many fields such as machinery, automobiles, aerospace, etc., and more stringent requirements are put forward for the processing accuracy and production efficiency of bushings. During the production and processing of bushings, precise fixation and positioning are the key factors to ensure product quality and processing accuracy.

[0003] According to the search, the Chinese patent document, publication number: CN215824890U, discloses a fixture for bushing processing. The outer wall of the bushing is clamped by an outer clamping component to fix the bushing, and then the inner wall of the bushing is processed. After the processing is completed, the second driving component drives the mounting plate to move upward, and the inner clamping component limits the inner wall of the bushing to fix the bushing. Then, the first driving component drives the mounting ring to move downward, and finally, the outer wall of the bushing is processed. Processing the inner wall and outer wall of the bushing improves the processing efficiency of the bushing.

[0004] However, in the actual use process of the above fixture, the clamping of the outer wall and the inner wall of the bushing rely on two completely independent structures. On the one hand, this increases the production cost of the fixture. On the other hand, there is a problem of cumbersome operation, and the opening stroke of its inner clamping component is short, and it can only be applicable to a certain type of bushing. Summary of the Invention

[0005] (I) Technical Problems to be Solved

[0006] Aiming at the deficiencies of the prior art, the present invention provides a fixed jig for the production and processing of bushings, which has the advantages of being able to clamp the outer wall of the bushing, and also can clamp the inner wall of the bushing, and is applicable to various types of bushings, etc., and solves the above technical problems.

[0007] (II) Technical Solutions

[0008] To achieve the above object of x, the present invention provides the following technical solution: A fixing jig for the production and processing of a bushing, comprising a base, a connecting rod is fixedly connected to the top surface of the base, a frustum is fixedly connected to the top end of the connecting rod, a pin shaft one is fixedly connected to the lower surface of the frustum, a curved plate is rotatably connected to the outer surface of the pin shaft one, and a bottom plate is fixedly connected to the bottom end of the pin shaft one. A positioning rod is installed on the top of the curved plate, a pin shaft two is rotatably connected inside the curved plate, an arc-shaped rod is rotatably connected to the outer surface of the pin shaft two, one end of the arc-shaped rod is rotatably connected to a pin shaft three, a collar is connected to the bottom end of the pin shaft three, an arc-shaped groove is formed through the upper surface of the collar, a sliding rod is in sliding contact with the arc-shaped groove, a ratchet disc is fixedly connected to the outer surface of the collar, and a rotating plate is connected to the lower surface of the collar by screws, and a handle is connected to the outer surface of the rotating plate by screws. A limiting component and an arc-shaped plate are installed on the lower surface of the frustum;

[0009] The limiting component includes a mounting block connected to the lower surface of the frustum by screws, a sleeve is fixedly connected to the bottom of the mounting block, a pull rod is arranged inside the sleeve, a wedge-shaped block is fixedly connected to one end of the pull rod, and a first spring is sleeved on the outer surface of the pull rod. A groove is formed on the outer surface of the pull rod, a conical circular plate is slidably connected to the inside of the groove, a limiting piece is fixedly connected to the outer surface of the conical circular plate, a spherical protrusion is fixedly connected to the outer surface of the limiting piece, a top ring is fixedly connected to the outer surface of the pull rod, a second spring abuts against the end surface of the top ring, and a torsion piece is fixedly connected to the top end of the pull rod.

[0010] Preferably, at least three connecting rods are fixedly connected between the base and the frustum, and the three connecting rods are circumferentially arranged around the axis direction of the frustum.

[0011] Preferably, three pin shafts one are connected between the frustum and the bottom plate, there are three curved plates, and three arc-shaped rods are rotatably connected between the curved plates and the collar.

[0012] Preferably, the sliding rod is connected to the lower surface of the frustum by screws, the bottom plate includes three ear blocks arranged on the outer surface, and the three ear blocks are fixedly connected to the pin shaft one.

[0013] Preferably, an embedding groove is formed on the upper surface of the curved plate, the positioning rod is connected to the embedding groove by screws, and a flexible pad is bonded to the outer surface of the positioning rod.

[0014] Preferably, the arc-shaped plate includes an arc groove formed on the outer surface, the handle penetrates through the inside of the arc groove, and a ball head is fixedly connected to the end of the handle away from the rotating plate.

[0015] Preferably, the first spring is arranged inside the sleeve, and the bottom end of the first spring abuts against the wedge-shaped block.

[0016] Preferably, a hemispherical groove is formed at the top of the sleeve, and the hemispherical groove is fitted with the spherical protrusion. Two hemispherical grooves are provided and are symmetrically arranged around the axis of the pull rod.

[0017] Preferably, the conical disc includes a limiting slider disposed inside. The limiting slider is slidably connected to the groove. One end of the second spring abuts against the top ring, and the other end of the second spring abuts against the conical disc.

[0018] Compared with the prior art, the present invention provides a fixing jig for the production and processing of bushings, and has the following beneficial effects:

[0019] 1. The fixing jig for the production and processing of bushings provided by the present invention can not only fix the inner shaft surface of the bushing, but also fix the outer peripheral surface of the bushing. Whether it is processing the outer peripheral surface or the inner peripheral surface of the bushing, the positioning rod can accurately fit the corresponding part through corresponding operations to fix the bushing, meeting different processing requirements, being applicable to a variety of different processing scenarios, avoiding the trouble of replacing the jig due to a single fixing method, and improving the applicability of the jig.

[0020] 2. The fixing jig for the production and processing of bushings provided by the present invention realizes the reliable fixing and rapid release of the bushing through the setting of the limiting component. The core lies in the close cooperation between the wedge block and the ratchet disc: when the collar drives the ratchet disc to rotate, the wedge block slides on the inclined surface and slightly moves to ensure that it does not hinder the normal rotation of the ratchet disc; when the positioning is completed, the wedge block fits into the tooth groove of the ratchet disc, effectively preventing its rotation, thereby locking the position of the collar and ensuring that the three positioning rods firmly clamp the bushing to achieve reliable fixing; for rapid release, the operator only needs to rotate the torsion piece to drive the pull rod and the conical disc, so that the limiting piece rotates and drives the spherical protrusion to disengage from one hemispherical groove, and then rotates 180 degrees and is stuck into the other hemispherical groove to change the limiting direction of the wedge block, thereby rapidly releasing the bushing; the whole process does not require additional tools, and the operation is simple and efficient; the limiting component and the overall structure of the jig complement each other, are applicable to bushings of different diameters, and support two-way fixing from the inner shaft surface and the outer peripheral surface to meet various processing requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a perspective schematic diagram of the first perspective of the present invention;

[0022] Figure 2 is an exploded schematic diagram of the structure of the present invention;

[0023] Figure 3 is a perspective schematic diagram of the second perspective of the present invention;

[0024] Figure 4 is a cross-sectional schematic diagram of the present invention;

[0025] Figure 5 For the present invention Figure 4 Partial enlarged schematic view of A in the present invention;

[0026] Figure 6 Stereoscopic schematic view of the curved plate and the positioning rod in the present invention;

[0027] Figure 7 Exploded view of the limiting component in the present invention.

[0028] Wherein: 1, base; 2, connecting rod; 3, frustum; 4, pin shaft I; 5, curved plate; 6, bottom plate; 7, positioning rod; 8, pin shaft II; 9, arc rod; 10, pin shaft III; 11, collar; 12, arc groove; 13, slide bar; 14, ratchet disc; 15, rotating plate; 16, handle; 17, limiting component; 171, mounting block; 172, sleeve; 173, pull rod; 174, wedge block; 175, spring I; 176, groove; 177, conical disc; 178, limiting piece; 179, spherical protrusion; 1710, top ring; 1711, spring II; 1712, torsion piece; 1713, hemispherical groove; 18, arc plate; 181, arc groove. Specific embodiments

[0029] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0030] Please refer to Figures 1-7 , a fixing fixture for the production and processing of bushings, comprising a base 1, a connecting rod 2 fixedly connected to the top surface of the base 1, a frustum 3 fixedly connected to the top end of the connecting rod 2, a pin shaft I 4 fixedly connected to the lower surface of the frustum 3, a curved plate 5 rotatably connected to the outer surface of the pin shaft I 4, and a bottom plate 6 fixedly connected to the bottom end of the pin shaft I 4. A positioning rod 7 is installed on the top of the curved plate 5. A pin shaft II 8 is rotatably connected inside the curved plate 5. An arc rod 9 is rotatably connected to the outer surface of the pin shaft II 8. One end of the arc rod 9 is rotatably connected to a pin shaft III 10. The bottom end of the pin shaft III 10 is connected to a collar 11. An arc groove 12 is formed through the upper surface of the collar 11. A slide bar 13 is in sliding contact with the arc groove 12. A ratchet disc 14 is fixedly connected to the outer surface of the collar 11. The lower surface of the collar 11 is connected to a rotating plate 15 by screws. The outer surface of the rotating plate 15 is connected to a handle 16 by screws. A limiting component 17 and an arc plate 18 are installed on the lower surface of the frustum 3;

[0031] The limiting component 17 includes a mounting block 171 connected to the lower surface of the frustum 3 by screws. A sleeve 172 is fixedly connected to the bottom of the mounting block 171. A pull rod 173 is arranged inside the sleeve 172. One end of the pull rod 173 is fixedly connected with a wedge block 174. A first spring 175 is sleeved on the outer surface of the pull rod 173. A groove 176 is formed on the outer surface of the pull rod 173. A conical disc 177 is slidably connected inside the groove 176. A limiting piece 178 is fixedly connected to the outer surface of the conical disc 177. A spherical protrusion 179 is fixedly connected to the outer surface of the limiting piece 178. A top ring 1710 is fixedly connected to the outer surface of the pull rod 173. A second spring 1711 abuts against the end surface of the top ring 1710. A torsion piece 1712 is fixedly connected to the top end of the pull rod 173.

[0032] Specifically, at least three connecting rods 2 are fixedly connected between the base 1 and the frustum 3. The three connecting rods 2 are circumferentially arranged around the axis direction of the frustum 3. Three pin shafts 4 are connected between the frustum 3 and the bottom plate 6. There are three curved plates 5. Three arc-shaped rods 9 are rotatably connected between the curved plates 5 and the collar 11. The sliding rod 13 is connected to the lower surface of the frustum 3 by screws. The bottom plate 6 includes three ear blocks arranged on the outer surface. The three ear blocks are fixedly connected with the pin shafts 4. An embedding groove is formed on the upper surface of the curved plate 5. A positioning rod 7 is connected in the embedding groove by screws. A flexible pad is bonded to the outer surface of the positioning rod 7.

[0033] When machining the outer peripheral surface of the bushing, it is necessary to fix it from the inner shaft surface of the bushing. At this time, by placing the inner ring of the bushing between the three positioning rods 7, and then twisting the handle 16 to drive the rotating plate 15, the rotating plate 15 drives the collar 11 to rotate. The collar 11 drives the arc-shaped groove 12 to rotate around its axis direction. The arc-shaped groove 12 drives the pin shaft three 10 under the guiding action of the three sliding rods 13. The pin shaft three 10 pulls the arc-shaped rod 9. The arc-shaped rod 9 drives the curved plate 5 to rotate around the pin shaft 4. In this way, the curved plate 5 drives the positioning rod 7 connected to it to expand outwards. In this way, the three positioning rods 7 can be closely attached to the inner peripheral surface of the bushing, so as to fix the bushing, thus facilitating the machining of the outer peripheral surface of the bushing; and when machining the inner peripheral surface of the bushing, the outer peripheral surface of the bushing is placed between the three positioning rods 7. Reversely rotating the handle 16 can drive the three positioning rods 7 to be closely attached to the outer peripheral surface of the bushing. In this way, the bushing can be fixed on the outer peripheral surface, so as to facilitate the machining of the inner shaft surface of the bushing. The overall structure can not only fix the inner shaft surface of the bushing, but also fix the outer peripheral surface of the bushing, improving the applicability of the fixture and being able to be suitable for fixing bushings with various different diameters.

[0034] Specifically, the arc-shaped plate 18 includes an arc groove 181 formed on the outer surface. The handle 16 is inserted into the arc groove 181, and a ball head is fixedly connected to the end of the handle 16 away from the rotating plate 15. The first spring 175 is arranged inside the sleeve 172, and the bottom end of the first spring 175 abuts against the wedge-shaped block 174. A hemispherical groove 1713 is formed at the top of the sleeve 172. The hemispherical groove 1713 fits with the spherical protrusion 179. There are two hemispherical grooves 1713, and the two hemispherical grooves 1713 are symmetrically arranged around the axis of the pull rod 173. The conical disc 177 includes a limiting slider arranged inside. The limiting slider is slidably connected to the groove 176. One end of the second spring 1711 abuts against the top ring 1710, and the other end of the second spring 1711 abuts against the conical disc 177.

[0035] When the handle 16 is rotated to drive the rotating plate 15, and the rotating plate 15 drives the collar 11 to rotate, the collar 11 can also drive the ratchet disc 14 to rotate. Since the wedge-shaped block 174 is arranged in the tooth groove of the ratchet disc 14, and when the ratchet disc 14 rotates, it contacts the inclined surface of the wedge-shaped block 174. At this time, the wedge-shaped block 174 will slightly move towards the torsion piece 1712, so as not to hinder the rotation of the ratchet disc 14. When the three arc-shaped rods 9 position the bushing, the collar 11 stops rotating, that is, the ratchet disc 14 stops rotating. Since one side of the wedge-shaped block 174 fits in the tooth groove of the ratchet disc 14, the ratchet disc 14 can be prevented from rotating back, and further the collar 11 can be prevented from rotating back, so as to lock the positions of the three positioning rods 7, and thus the clamped bushing can be fixed. When it is necessary to change the rotation direction of the collar 11, by rotating the torsion piece 1712 to drive the pull rod 173 to rotate, the limiting slider of the conical disc 177 is driven to rotate by the pull rod 173 in cooperation with the groove 176. Then the conical disc 177 drives the limiting piece 178 to rotate, and the limiting piece 178 drives the spherical protrusion 179 to disengage from one of the hemispherical grooves 1713. When the torsion piece 1712 is rotated 180 degrees, the limiting piece 178 will drive the spherical protrusion 179 to rotate 180 degrees, and then the spherical protrusion 179 is snapped into the other hemispherical groove 1713. By arranging the second spring 1711, the spherical protrusion 179 is kept snapped into the hemispherical groove 1713. During the whole process, the wedge-shaped block 174 can be accurately rotated 180 degrees and fixed. In this way, the limiting direction of the wedge-shaped block 174 on the ratchet disc 14 is changed. This means that when it is necessary to remove the bushing from the three positioning rods 7, the limiting direction of the wedge-shaped block 174 needs to be changed. Although the whole fixture structure relies on manual operation, the operation process is simple and convenient, and the fixation or release of the bushing can be quickly realized.

[0036] In use, when machining the outer peripheral surface of the bushing, place the inner ring of the bushing between the three positioning rods 7. Turn the handle 16 to drive the rotating plate 15. The rotating plate 15 drives the collar 11 to rotate. The collar 11 drives the arc groove 12 to move under the guidance of the slide rod 13, so that the pin three 10 pulls the arc rod 9. The arc rod 9 drives the curved plate 5 to rotate around the pin one 4, causing the positioning rods 7 to expand outwards and closely adhere to the inner peripheral surface of the bushing, fixing the bushing for convenient machining of the outer peripheral surface. When machining the inner peripheral surface of the bushing, place the outer peripheral surface of the bushing between the three positioning rods 7. Reverse-rotate the handle 16 to make the positioning rods 7 closely adhere to the outer peripheral surface of the bushing, fixing the bushing for machining the inner peripheral surface. When turning the handle 16 to drive the rotating plate 15 and further drive the collar 11 to rotate, the collar 11 drives the ratchet disc 14 to rotate. The wedge block 174 is placed in the tooth groove of the ratchet disc 14. When rotating, the wedge block 174 will slightly move without hindering the rotation of the ratchet disc 14. After positioning, the ratchet disc 14 stops rotating, and the wedge block 174 can prevent its reverse rotation to lock the position of the positioning rod 7. When it is necessary to change the rotation direction of the collar 11, turn the torsion piece 1712 to drive the pull rod 173 to rotate. Under the cooperation of the groove 176, the conical disc 177 drives the limiting piece 178 to rotate. The spherical protrusion 179 disengages from one hemispherical groove 1713. After turning the torsion piece 1712 by 180 degrees, the spherical protrusion 179 snaps into another hemispherical groove 1713, changing the limiting direction of the wedge block 174 to facilitate removing the bushing from the positioning rod 7.

[0037] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A fixing fixture for producing and processing a shaft sleeve, comprising a base (1), the top surface of the base (1) being fixedly connected to a connecting rod (2), the top end of the connecting rod (2) being fixedly connected to a round table (3), characterized in that: The lower surface of the truncated table (3) is fixedly connected to a pin shaft 1 (4), the outer surface of the pin shaft 1 (4) is rotatably connected to a curved plate (5), and the bottom end of the pin shaft 1 (4) is fixedly connected to a bottom plate (6), a positioning rod (7) is installed on the top of the curved plate (5), the interior of the curved plate (5) is rotatably connected to a pin shaft 2 (8), the outer surface of the pin shaft 2 (8) is rotatably connected to an arc rod (9), one end of the arc rod (9) is rotatably connected to a pin shaft 3 (10), and the pin shaft 3 (10) is fixedly connected to a bottom plate (6) at the bottom end of the pin shaft 1 (4). The bottom end is connected to a collar (11), an arc groove (12) is formed through the upper surface of the collar (11), a slide bar (13) is slidably contacted in the arc groove (12), a ratchet disc (14) is fixedly connected to the outer surface of the collar (11), and a rotating plate (15) is connected to the lower surface of the collar (11) by screws, and a handle (16) is connected to the outer surface of the rotating plate (15) by screws, and a limit assembly (17) and an arc plate (18) are installed on the lower surface of the round table (3); The limiting assembly (17) includes a mounting block (171) connected to the lower surface of the truncated table (3) by screws, the bottom of the mounting block (171) is fixedly connected to a sleeve (172), a pull rod (173) is arranged inside the sleeve (172), one end of the pull rod (173) is fixedly connected to a wedge block (174), and the outer surface of the pull rod (173) is sleeved with a spring (175), and the outer surface of the pull rod (173) is provided with a groove (176). The groove (176) is internally slidably connected with a conical disc (177), the outer surface of the conical disc (177) is fixedly connected with a limiting plate (178), the outer surface of the limiting plate (178) is fixedly connected with a spherical protrusion (179), the outer surface of the pull rod (173) is fixedly connected with a top ring (1710), the end face of the top ring (1710) abuts against spring 2 (1711), and the top end of the pull rod (173) is fixedly connected with a torsion plate (1712).

2. A fixing fixture for sleeve production and processing according to claim 1, characterized in that: At least three connecting rods (2) are fixedly connected between the base (1) and the truncated cone (3), and the three connecting rods (2) are circumferentially arranged around the axial direction of the truncated cone (3).

3. The fixing fixture for producing and processing axle sleeve according to claim 1 is characterized in that: Three pin shafts (4) are connected between the truncated table (3) and the bottom plate (6), three curved plates (5) are provided, and three arc-shaped rods (9) are rotatably connected between the curved plate (5) and the sleeve ring (11).

4. The fixing fixture for producing and processing axle sleeves according to claim 1 is characterized in that: The slide bar (13) is connected to the lower surface of the truncated table (3) by means of screws, and the bottom plate (6) includes three ear blocks arranged on the outer surface, and the three ear blocks are fixedly connected to the pin shaft (4).

5. The fixing fixture for producing and processing a sleeve according to claim 1 is characterized in that: An embedding groove is provided on the upper surface of the curved plate (5), a positioning rod (7) is connected in the embedding groove via screws, and a flexible pad is bonded to the outer surface of the positioning rod (7).

6. A fixing fixture for producing and processing a shaft sleeve according to claim 1, characterized in that: The arc plate (18) comprises an arc groove (181) opened on the outer surface, the handle (16) is inserted into the arc groove (181), and one end of the handle (16) away from the rotating plate (15) is fixedly connected to a ball head.

7. The fixing fixture for producing and processing a shaft sleeve according to claim 1 is characterized in that: The spring 1 (175) is disposed inside the sleeve (172), and the bottom end of the spring 1 (175) abuts against the wedge block (174).

8. The fixing fixture for producing and processing axle sleeve according to claim 1 is characterized in that: A hemispherical groove (1713) is provided on the top of the sleeve (172), and the hemispherical groove (1713) and the spherical protrusion (179) fit each other. There are two hemispherical grooves (1713), and the two hemispherical grooves (1713) are symmetrically arranged around the axis of the pull rod (173).

9. The fixing fixture for producing and processing a shaft sleeve according to claim 1, characterized in that: The conical disc (177) includes a limiting slider disposed inside, the limiting slider is slidably connected to the groove (176), one end of the second spring (1711) abuts against the top ring (1710), and the other end of the second spring (1711) abuts against the conical disc (177).

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