Small clamp structure

Abstract

The utility model discloses a small clamp structure which comprises a base, a bearing seat and a mounting seat, and a profiling placing groove is formed in the middle of the surface of the bearing seat; a notch groove is formed in the middle of the mounting seat, the interior of the mounting seat is hollow, a rotating shaft penetrating through the notch groove is rotatably arranged in the mounting seat through bearing seats on the two sides of the interior of the mounting seat, and a clamping block connected to the rotating shaft is mounted in the notch groove; racks penetrating through the bearing seat are arranged on the two sides of the surface of the base in the length direction respectively, a swing arm is arranged below one mounting seat, and under the action of the swing arm, the motion directions of the two racks are opposite; a rotating shaft is arranged on the base, a rotating gear is arranged at one side end of the rotating shaft, the rotating gear is meshed with the racks, a push-pull air cylinder is arranged on one outer side of the base, and the push-pull air cylinder is connected with the end of one rack. The workpiece in the profiling placing groove is clamped downwards through the clamping block, the clamping effect is good, the clamping force can be controlled, and use is very flexible.

Description

Technical Field

[0001] The utility model relates to the field of processing fixtures, in particular to a small fixture structure. Background Art

[0002] In automated assembly line production, there is usually an automatic clamping and assembly process for workpieces. For example, in watch production, the dial needs to be fixed to facilitate the installation of related components.

[0003] For example, a Chinese patent with the prior art patent number CN217943013U discloses a positioning fixture for watch polishing, including a shell, a watch splint and a base, the shell is installed on the top of the base, and a pop-up structure is arranged at the bottom end inside the shell, the pop-up structure includes a placement groove, a limit rod, a watch pop-up plate and a telescopic spring, the placement groove is installed at the bottom end inside the shell, the inside of the placement groove is evenly installed with telescopic springs, and the top of the telescopic spring is installed with a watch pop-up plate, the limit rods are installed on both sides of the bottom end of the watch pop-up plate, the inside of the shell is evenly installed with watch splints, and one side of the watch splint is provided with a protective structure.

[0004] However, the above-mentioned method of tightening the watch by simply rotating the bolt will cause the bolt to shake due to the frequent rotation of the bolt in the nut without tightening, thereby causing the clamping force to gradually decrease and the clamping effect to be poor. Utility Model Content

[0005] The purpose of the utility model is to provide a small clamp structure to solve the problems mentioned in the above background technology.

[0006] To achieve the above purpose, the utility model adopts the following contents:

[0007] The utility model provides a small clamp structure, which includes a base, a bearing seat is arranged in the middle of the base, a contour placement groove is arranged in the middle of the surface of the bearing seat, and mounting seats are arranged on both sides of the surface of the base and are respectively located outside the bearing seat;

[0008] A notch groove is arranged in the middle of the mounting seat, the interior of the mounting seat is hollow and a rotating shaft passing through the notch groove is rotatably arranged through the bearing seats on both sides of the interior thereof, and a clamping block connected to the rotating shaft is installed in the notch groove;

[0009] Racks penetrating the bearing seat are respectively arranged on both sides of the surface of the base along the length direction, and rack teeth are formed in an array on the upper surface of the rack. A swing arm is arranged below one of the mounting seats, and the middle part of the swing arm is rotatably arranged on the base. Both side ends of the swing arm are respectively located at the bottom of a rack and movably engaged with the rack. Under the action of the swing arm, the movement directions of the two racks are opposite;

[0010] A rotating gear is arranged on one side end of the rotating shaft, and the rotating gears in the left and right mounting seats are respectively distributed on different sides. The rotating gear is meshed with the rack teeth on the rack, and a horizontal push-pull cylinder is arranged on one outer side of the base, and the output end of the push-pull cylinder is connected to the end of one of the racks through a connecting rod.

[0011] According to a small clamp structure provided by the utility model, the front end of the clamp block protrudes outward to form a clamping head, and accommodating openings for the clamping head are provided on both sides of the upper end of the contoured placement groove.

[0012] According to a small clamp structure provided by the utility model, both side ends of the swing arm are provided with elliptical holes, a vertical intermediate shaft body is movably inserted into the elliptical hole, a latch and a guide wheel are respectively provided at the upper and lower ends of the intermediate shaft body, the latch pin is upwardly inserted into the rack, and a guide groove is recessed on the surface of the base for the guide wheel to slide back and forth.

[0013] Furthermore, the end of the rack that is not connected to the push-pull cylinder protrudes outward to form an extension shaft, a spring is provided outside the extension shaft, and a socket for the extension shaft to pass freely is opened on the outer wall of the mounting seat.

[0014] According to a small clamp structure provided by the utility model, an angle sensor facing the end of the rotating shaft is arranged inside one of the mounting seats.

[0015] According to a small clamp structure provided by the utility model, a guide sleeve which is slidably matched with the rack is arranged inside the bearing seat.

[0016] Compared with the prior art, the utility model has the following technical effects: the utility model has a simple structure, a reasonable design, and a light volume; it has a highly symmetrical structural design. Under the limiting action of the swing arm, the movement directions of the two racks are opposite to each other, and the rotating shaft and the rack are meshed and connected by a rotating gear. When one of the racks is driven to slide by the push-pull cylinder, the other rack will slide in the opposite direction, which makes the rotation directions of the two rotating shafts synchronized and opposite to each other, thereby realizing the synchronous movement of the clamping block on the rotating shaft, and then the downward clamping of the workpiece in the contoured placement groove is realized through the clamping block. The clamping effect is good, the clamping force can also be controlled, and it is very flexible to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The specific implementation of the utility model is further described in detail below with reference to the accompanying drawings.

[0018] Figure 1 This is an overall schematic diagram of a small clamp structure according to an embodiment of the utility model;

[0019] Figure 2This is an internal structural diagram of a small clamp structure according to an embodiment of the utility model (after hiding the bearing seat and the mounting seat);

[0020] Figure 3 It is a partial schematic diagram of the swing arm and the rack according to the embodiment of the utility model;

[0021] 1-base, 2-bearing seat, 3-mounting seat, 4-clamping block, 5-rack, 6-swing arm, 7-push-pull cylinder, 8-angle sensor; 11-guide groove, 21-profile placement groove, 22-accommodating opening, 31-notch groove, 32-bearing seat, 33-rotating shaft, 34-rotating gear, 35-jack, 41-clamping head, 51-rack teeth, 52-extension shaft, 53-spring, 61-elliptical hole, 62-intermediate shaft, 63-latch pin, 64-guide wheel, 71-connecting rod. DETAILED DESCRIPTION

[0022] In order to explain the present invention more clearly, the present invention is further described below in conjunction with preferred embodiments. Those skilled in the art should understand that the following specific description is illustrative rather than restrictive, and should not be used to limit the scope of protection of the present invention.

[0023] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" 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 mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0024] like Figures 1 to 3 The embodiment of the utility model provides a small clamp structure, including a horizontally arranged base 1, a bearing seat 2 is arranged in the middle of the base 1, a contoured placement groove 21 is arranged in the middle of the surface of the bearing seat 2 to adapt to the shape of the product to be fixed, and mounting seats 3 are arranged on both sides of the surface of the base 1 and are respectively located outside the bearing seat 2. From a top view, the two mounting seats are designed to be left-right symmetrical.

[0025] Secondly, a notch groove 31 is recessed inwardly in the middle of the mounting seat 3. The interior of the mounting seat 3 is hollow and a rotating shaft 33 passing through the notch groove 31 is rotatably provided through the bearing seats 32 on both sides thereof. A clamping block 4 connected to the rotating shaft is installed in the notch groove 32. The clamping block 4 will rotate synchronously with the rotation of the rotating shaft 33. The clamping block 4 will rotate inwardly and act on the edge of the product in the contoured placement groove 21, thereby achieving a clamping effect on the product.

[0026] Next, racks 5 penetrating the supporting seat 2 are respectively arranged on both sides of the surface of the base 1 along the length direction, and rack teeth 51 are formed in an array on the upper surface of the rack 5. A swing arm 6 is arranged below one of the mounting seats 3. The middle part of the swing arm 6 is rotatably arranged on the base 1. The two side ends of the swing arm 6 are respectively located at the bottom of a rack 5 and are movably engaged with the rack 5. Under the action of the swing arm 6, the movement directions of the two racks 5 are opposite, that is, when one of the racks moves in translation and forces the swing arm to rotate, the other end of the swing arm will drive the other rack to move in the opposite direction.

[0027] Finally, a rotating gear 34 is set at one side end of the rotating shaft 33, and the rotating gears 34 in the left and right mounting seats 3 are distributed on different sides. From a top view, the two rotating gears are arranged in a nearly center-symmetrical manner with the center of the supporting seat. The rotating gear 34 will engage with the rack teeth 51 on the rack 5. A horizontal push-pull cylinder 7 is set on one of the outer sides of the base 1, and the output end of the push-pull cylinder 7 is connected to the end of one of the racks 5 through a connecting rod 71.

[0028] In this way, when the push-pull cylinder drives the first rack to perform translational motion, the rotating gear on the same side of the first rack will rotate, and then drive the rotation of the clamp on the rotating shaft at that position. When the first rack moves, it will force the second rack to perform translational motion in the opposite direction through the swing arm, and the rotating gear on the same side of the second rack will also rotate. In fact, the rotation directions of the two rotating gears are also opposite to each other, so that the two clamps can rotate inward or outward synchronously, thereby achieving the clamping or release of the product.

[0029] Under the limiting action of the swing arm, the movement directions of the two racks are opposite to each other, the rotating shaft and the racks are meshed and connected by rotating gears, and one of the racks is driven to slide by the push-pull cylinder, and the other rack will slide in the opposite direction, which makes the rotation directions of the two rotating shafts synchronized and opposite to each other, thereby realizing the synchronous rotation movement of the clamping block on the rotating shaft, and then realizing the downward clamping of the workpiece in the contour placement groove through the clamping block.

[0030] In this embodiment, the front end of the clamp block 4 protrudes outward to form a clamping head 41, and the upper ends of the contour placement groove 21 are provided with receiving openings 22 for the clamping head 41 to act on. In this way, during the inward rotation of the clamp block, the clamping head on it will contact the edge of the product in the contour placement groove through the receiving opening, and the contact area with the product is small and will not affect the clamping effect, so as to minimize the interference with the product processing process.

[0031] In this embodiment, both sides of the swing arm 6 are provided with an elliptical hole 61, and a vertical intermediate shaft body 62 is movably placed in the elliptical hole 61. A latch 63 and a guide wheel 64 are respectively provided at the upper and lower ends of the intermediate shaft body 62. The latch 63 is inserted upwardly into the rack 5, and a guide groove 11 is provided on the surface of the base 1 for the guide wheel 64 to slide forward and backward. During the swing arm swinging left and right, the intermediate shaft body will swing left and right in the elliptical hole to adapt to the movement of the swing arm, and then drive the rack to perform a corresponding translation movement through the latch on the intermediate shaft body.

[0032] Furthermore, the end of the rack 5 that is not connected to the push-pull cylinder 7 protrudes outward to form an extension shaft 52, and a spring 53 is provided on the extension shaft 52, which is always in a compressed state, and a plug hole 35 is provided on the outer wall of the mounting seat 3 for the extension shaft 52 to pass freely. That is, the spring is between the end of the rack and the inner wall of the mounting seat, and the purpose is to ensure the stability of the swing posture of the swing arm through the elastic action of the spring, and avoid shaking during the swing of the swing arm.

[0033] In this embodiment, an angle sensor 8 facing the end of the rotating shaft 33 is disposed inside one of the mounting seats 3 to flexibly determine the rotation angle of the rotating shaft, thereby determining the rotation angle of the clamp on the rotating shaft.

[0034] In this embodiment, a guide sleeve 11 is provided inside the bearing seat 2 to slide with the rack 5. The guide sleeve ensures the stability and position consistency of the rack during translation, thereby preventing shaking.

[0035] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not limitations on the implementation methods of the present invention. For ordinary technicians in the relevant field, other different forms of changes or modifications can be made based on the above description. It is impossible to list all the implementation methods here. All obvious changes or modifications derived from the technical solution of the present invention are still within the scope of protection of the present invention.

Claims

1. A small clamp structure, characterized in that: It comprises a base, a bearing seat is arranged in the middle of the base, a contour placement groove is arranged in the middle of the surface of the bearing seat, and mounting seats are arranged on both sides of the surface of the base and are respectively arranged outside the bearing seat; A notch groove is arranged in the middle of the mounting seat, the interior of the mounting seat is hollow and a rotating shaft passing through the notch groove is rotatably arranged through the bearing seats on both sides of the interior thereof, and a clamping block connected to the rotating shaft is installed in the notch groove; Racks penetrating the bearing seat are respectively arranged on both sides of the surface of the base along the length direction, and rack teeth are formed in an array on the upper surface of the rack. A swing arm is arranged below one of the mounting seats, and the middle part of the swing arm is rotatably arranged on the base. Both side ends of the swing arm are respectively located at the bottom of a rack and movably engaged with the rack. Under the action of the swing arm, the movement directions of the two racks are opposite; A rotating gear is arranged on one side end of the rotating shaft, and the rotating gears in the left and right mounting seats are respectively distributed on different sides. The rotating gear is meshed with the rack teeth on the rack, and a horizontal push-pull cylinder is arranged on one outer side of the base, and the output end of the push-pull cylinder is connected to the end of one of the racks through a connecting rod.

2. A small clamp structure according to claim 1, characterized in that: The front end of the clamping block protrudes outward to form a clamping head, and accommodating openings for the clamping head to act on are provided on both sides of the upper end of the contoured placement groove.

3. A small clamp structure according to claim 1, characterized in that: Elliptical holes are provided on both side ends of the swing arm, and a vertical intermediate shaft body is movably inserted into the elliptical hole. A latch and a guide wheel are respectively provided at the upper and lower ends of the intermediate shaft body. The latch is inserted upward into the rack, and a guide groove is recessed on the surface of the base for the guide wheel to slide back and forth.

4. A small clamp structure according to claim 3, characterized in that: The end of the rack that is not connected to the push-pull cylinder protrudes outward to form an extension shaft, a spring is arranged outside the extension shaft, and a socket for the extension shaft to pass freely is opened on the outer wall of the mounting seat.

5. A small clamp structure according to claim 1, characterized in that: An angle sensor facing the end of the rotating shaft is arranged inside one of the mounting seats.

6. A small clamp structure according to claim 1, characterized in that: A guide sleeve is arranged inside the bearing seat and is slidably matched with the rack.

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