A press riveting device for dial zero gears

Abstract

The utility model discloses a kind of dial zero-adjusting gear's pressure riveting device, comprising: equipment frame, fixture, cylinder and pressure riveting rod.The pressure riveting process of pressure riveting device: the screw nut of screw is placed in screw groove;Dial is placed in fixture, screw passes through dial, support dial by first horizontal support surface, two second horizontal support surface, position dial by first vertical face, two second vertical face;In turn put-in washer, type ring, zero-adjusting gear;Start cylinder, pressure riveting rod moves down, first sliding sleeve bottom surface contact dial, dial is pressed tightly, then sliding sleeve keeps unmoved, rod body continues to move down, and pressure riveting is carried out to zero-adjusting gear.It has beneficial effect: when pressure riveting zero-adjusting gear, dial is more stable, improve pressure riveting effect;Simple structure, convenient operation.

Description

Technical Field

[0001] This utility model relates to thermometer assembly tools, and in particular to a riveting device for a dial zeroing gear. Background Technology

[0002] During the assembly of a thermometer, the zero-adjustment gear needs to be riveted, which is generally accomplished using a riveting device. The riveting device includes: a frame, a fixture mounted on the frame, a cylinder mounted on the frame, and a riveting rod mounted on the cylinder piston rod. The existing fixture and riveting rod have relatively simple structures. The fixture has a screw slot for placing screws, and the riveting rod is a single rod section. The screw is manually placed into the screw slot, and then the dial is placed on the fixture. Simultaneously, the screw passes through the screw hole on the dial, and washers, retaining rings, and the zero-adjustment gear are inserted in sequence. The cylinder is then activated, and the riveting rod moves downward, riveting the zero-adjustment gear. However, the existing riveting device has some problems: when riveting the zero-adjustment gear, the dial's stability is generally poor, and it is prone to misalignment and deformation, affecting the subsequent meshing of the zero-adjustment gear and the gear on the pointer shaft. Utility Model Content

[0003] This application provides a riveting device for a dial zeroing gear, which can solve the problems mentioned in the background art.

[0004] This application provides a riveting device for a dial zeroing gear, comprising: Equipment rack; The fixture is mounted on the equipment frame; it has a lower first horizontal support surface and two higher second horizontal support surfaces, the first horizontal support surface also having screw slots; it also has a first vertical abutment surface forming three-point positioning and two second vertical abutment surfaces; The cylinder is fixedly connected to the equipment frame, above the corresponding screw slot; A press-fit rod is installed on the piston rod of a cylinder; it includes: a rod body, a sliding sleeve, a limiting component, and a spring; the top of the rod body is fixedly connected to the piston rod; the limiting component is inserted and fixed to the rod body; the sliding sleeve is sleeved and slides on the rod body, and has a groove for cooperating with the limiting component; the spring is sleeved on the rod body, with its upper end abutting against the interface of the rod body and its lower end abutting against the top surface of the sliding sleeve.

[0005] In some embodiments, the limiting member's fixed connection to the rod can be adjusted vertically.

[0006] In some embodiments, the position through which the limiting member passes on the rod is a waist-shaped groove; the limiting member includes: a first stop rod with a stud and a second stop rod with a threaded hole.

[0007] In some embodiments, the fixture includes: a concave base, a positioning block, and two positioning strips; the positioning block is fixedly connected to the horizontal portion of the base for the first horizontal support surface and the first vertical abutment surface to be provided. The positioning strip is fixedly connected to the base and is inclined, so as to provide a second horizontal support surface and a second vertical abutment surface.

[0008] In some embodiments, the closer to the positioning block, the smaller the distance between the two positioning strips.

[0009] In some embodiments, the fixture further includes: a plug-in rod; the distance between the two positioning strips increases as they approach the positioning block; the end of the positioning strip closest to the positioning block is hinged to the base; and the two longitudinal portions of the base and the end of the positioning strip furthest from the positioning block each have holes for the plug-in rod to be inserted.

[0010] In summary, this application provides a riveting device for a dial zero-adjustment gear, comprising: a frame, a fixture, a cylinder, and a riveting rod. The riveting process of the device is as follows: the screw nut is placed in the screw slot; the dial is placed in the fixture, the screw passes through the dial, and the dial is supported by a first horizontal support surface and two second horizontal support surfaces, and positioned by a first vertical abutment surface and two second vertical abutment surfaces; a washer, a retaining ring, and the zero-adjustment gear are placed in sequence; the cylinder is activated, the riveting rod moves downward, first the bottom surface of the sliding sleeve contacts the dial, pressing the dial tightly, then the sliding sleeve remains stationary, and the rod continues to move downward, riveting the zero-adjustment gear. The beneficial effects are: the dial is more stable when riveting the zero-adjustment gear, improving the riveting effect; the structure is simple and the operation is convenient. Attached Figure Description

[0011] To better illustrate the technical solutions in the embodiments of this application or the background art, the accompanying drawings used in the embodiments of this application or the background art will be described below.

[0012] Figure 1 This is a schematic diagram of the present application; Figure 2 for Figure 1 An enlarged schematic diagram of part A in the middle; Figure 3 A schematic diagram showing another configuration of the fixture; Figure 4 This is a schematic diagram showing that the fixed connection of the limiting component to the rod body can be adjusted vertically. Figure 5 This is a top view of the dial.

[0013] In the picture, 1. Equipment rack; 11. Base plate; 12. Frame body; 2. Fixture; 2A. First horizontal support surface; 2B. Second horizontal support surface; 2C. Screw slot; 2D. First vertical abutment surface; 2E. Second vertical abutment surface; 21. Base; 22. Positioning block; 23. Two positioning strips; 23A. Insertion block; 24. Insertion rod; 3. Cylinder; 4. Riveting rod; 41. Rod body; 42. Sliding sleeve; 42A. Groove rail; 43. Limiting component; 431. First stop rod; 432. Second stop rod; 44. Spring; 5. Dial; 5A. First circular groove; 5B. Second circular groove; 5C. Screw hole. Specific Implementation

[0014] The following description is provided in conjunction with the accompanying drawings, which are for illustrative purposes only and not strictly to scale. Unless otherwise defined, the technical or scientific terms used in this disclosure should be understood in their ordinary sense by one of ordinary skill in the art to which this disclosure pertains. The terms "first," "second," and similar terms used in this disclosure do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships, and these relative positional relationships may change accordingly when the absolute position of the described object changes. Unless otherwise specified, the embodiments in this application can be combined with each other.

[0015] Please see Figure 1 A riveting device for a dial zeroing gear includes: a frame 1, a fixture 2, a cylinder 3, and a riveting rod 4.

[0016] Please see Figure 5 The dial 5 has a first circular groove 5A and a second circular groove 5B, which partially overlap. The first circular groove 5A has a larger diameter and is deeper. The zero-adjustment gear is mounted in the second circular groove 5B on the dial 5, and the pointer shaft is mounted in the first circular groove 5A on the dial 5. The first circular groove 5A also provides mounting space for the gear disc that meshes with the zero-adjustment gear.

[0017] Please see Figure 1 The equipment frame 1 is used for the installation of other components. More specifically, the equipment frame 1 includes a base plate 11 and a frame body 12, with the frame body 12 fixedly connected to the base plate 11.

[0018] Please see Figure 1 and Figure 2 The fixture 2 is installed on the equipment rack 1, specifically on the base plate 11. The fixture 2 has three horizontal support surfaces for supporting the dial 5. These three horizontal support surfaces include: a lower first horizontal support surface 2A and two higher second horizontal support surfaces 2B.

[0019] When the dial 5 is placed on the fixture 2, the bottom surface of the second circular groove 5B contacts the first horizontal support surface 2A, and the bottom surface of the edge portion of the dial 5 contacts two second horizontal support surfaces 2B.

[0020] The first horizontal support surface 2A also has a screw groove 2C. More specifically, the screw groove 2C can be a regular hexagon. Before the dial 5 is placed on the fixture 2, the screw nut is placed in the screw groove 2C. The bottom wall of the second circular groove 5B has a screw hole 5C for the screw to pass through.

[0021] The fixture 2 also has a first vertical abutment surface 2D and two second vertical abutment surfaces 2E. These three vertical abutment surfaces fit into the circular outer wall of the first circular groove 5A, forming a three-point positioning system based on the principle that three points determine a circle. That is, the screw hole 5C is slightly larger than the screw, only used to allow the screw to pass through, so that the circular outer wall of the first circular groove 5A abuts against the first vertical abutment surface 2D and the two second vertical abutment surfaces 2E, completing the positioning of the dial 5 and aligning the screw with the screw hole 5C.

[0022] Please see Figure 2 and Figure 3 In some embodiments, the fixture 2 includes a concave base 21, a positioning block 22, and two positioning strips 23.

[0023] The base 21 is used for mounting to the equipment rack 1. The positioning block 22 is fixedly connected to the horizontal part of the base 21, or more specifically, a set of bolts can be used to achieve the fixed connection. A first horizontal support surface 2A, a screw groove 2C, and a first vertical abutment surface 2D are provided on the positioning block 22.

[0024] The positioning strip is fixedly connected to the base 21. The positioning strip is inclined, and the two positioning strips 23 can be designed to be mirror symmetrical. The second horizontal support surface 2B and the second vertical abutment surface 2E are set on the positioning strip.

[0025] Based on the above embodiment, "the fixture 2 includes: a concave base 21, a positioning block 22 and two positioning strips 23".

[0026] Please see Figure 2 In some embodiments, the closer to the positioning block 22, the smaller the distance between the two positioning strips 23. That is, if the diameter of the first circular groove 5A in the horizontal direction is taken as the dividing line, the first vertical abutment surface 2D and the two second vertical abutment surfaces 2E are on the same side. More specifically, the end of the positioning strip closer to the positioning block 22 is connected to the horizontal portion of the base 21, and the end farther away from the positioning block 22 is connected to the vertical portion of the base 21.

[0027] In this way, the dial 5 can be placed / removed from the fixture 2 by translation, which is relatively convenient. However, after the dial 5 is positioned by the first vertical abutment surface 2D and the two second vertical abutment surfaces 2E, the dial 5 is not limited.

[0028] Please see Figure 3 In other embodiments, the fixture 2 further includes a connector rod 24. The closer to the positioning block 22, the greater the distance between the two positioning strips 23. The end of the positioning strip closest to the positioning block 22 is hinged to the base 21. Both longitudinal portions of the base 21 and the end of the positioning strip furthest from the positioning block 22 have holes for the connector rod 24 to be inserted. More specifically, the end of the positioning strip furthest from the positioning block 22 may be hinged to a connector block 23A with holes.

[0029] Pull out the connector 24 and swing the two positioning bars 23 to the longitudinal direction; place the dial 5 onto the fixture 2 by translation; swing the two positioning bars 23 to the tilt position to position the dial 5; insert the connector 24 to fix the two positioning bars 23 to the base 21. If the diameter of the first circular groove 5A is taken as the dividing line, the first vertical abutment surface 2D and the two second vertical abutment surfaces 2E are located on both sides, which can position the dial 5 while restricting the translation of the dial 5.

[0030] Please see Figure 1 The cylinder 3 is fixedly connected to the frame 12 of the equipment frame 1, above the corresponding screw slot 2C.

[0031] Please see Figure 1 and Figure 2 The rivet rod 4 is mounted on the piston rod of the cylinder 3. The rivet rod 4 includes: rod body 41, sliding sleeve 42, limiting member 43 and spring 44.

[0032] The rod 41 is stepped, and its top is fixedly connected to the piston rod of the cylinder 3.

[0033] The limiting member 43 is fixed to the rod body 41. More specifically, the rod body 41 has a through hole, and the limiting member 43 is a pin that passes through and is engaged with the through hole.

[0034] The sliding sleeve 42 is fitted and slides on the rod body 41. The sliding sleeve 42 also has a groove 42A that cooperates with the limiting member 43. That is, there are two grooves 42A, which are opposite to each other.

[0035] Spring 44 is sleeved on rod 41. It is a compression spring 44. Its upper end abuts against the interface of rod 41, and its lower end abuts against the top surface of sliding sleeve 42.

[0036] When assembling the rivet rod 4: first, put the spring 44 into the rod body 41; then put the sliding sleeve 42 into the rod body 41; then manually move the sliding sleeve 42 so that the sliding sleeve 42 abuts against and compresses the spring 44 so that the two grooves 42A of the sliding sleeve 42 coincide with the through hole of the rod body 41; finally, insert and fix the connector into the rod body 41, and at the same time, the connector also passes through the two grooves 42A. Release the sliding sleeve 42, and under the action of the spring 44, the sliding sleeve 42 keeps the inner top wall of the groove 42A against the connector.

[0037] In summary, the riveting process of the riveting device is as follows: the screw nut is placed in the screw groove 2C; the dial 5 is placed in the fixture 2, the screw passes through the dial 5, and the dial 5 is supported by the first horizontal support surface 2A and two second horizontal support surfaces 2B, and positioned by the first vertical abutment surface 2D and two second vertical abutment surfaces 2E; the washer, the ferrule, and the zero-adjustment gear are placed in sequence; the cylinder 3 is activated, the riveting rod 4 moves down, first the bottom surface of the sliding sleeve 42 contacts the dial 5, pressing the dial 5 tightly, then the sliding sleeve 42 remains stationary, and the rod 41 continues to move down to rivet the zero-adjustment gear.

[0038] In some embodiments, the limiting member 43 is adjustable up and down along the fixed connection of the rod 41.

[0039] Under the action of spring 44, the sliding sleeve 42 keeps the inner top wall of the groove rail 42A against the connecting piece. By adjusting the limiting piece 43, the bottom position of the sliding sleeve 42 in this state can be adjusted to ensure that the bottom surface of the sliding sleeve 42 contacts the dial 5 first, and the rod 41 then presses and rivets the zero-adjustment gear.

[0040] Please see Figure 4 Furthermore, the position on the rod 41 through which the limiting member 43 passes is a waist-shaped groove. The limiting member 43 includes: a first stop 431 with a stud and a second stop 432 with a threaded hole.

[0041] That is, the stud of the first stop 431 passes through the rod body 41 and is threaded to the second stop 432. Tightening the second stop 432 locks the first stop 431 and the second stop 432 onto the rod body 41.

Claims

1. A riveting device for a dial zeroing gear, characterized in that, include: Equipment rack (1); The fixture (2) is mounted on the equipment rack (1); it has a lower first horizontal support surface (2A) and two higher second horizontal support surfaces (2B), the first horizontal support surface (2A) also having a screw groove (2C); it also has a first vertical abutment surface (2D) forming a three-point positioning and two second vertical abutment surfaces (2E); Cylinder (3) is fixedly connected to the equipment frame (1) above the corresponding screw slot (2C); A rivet rod (4) is installed on the piston rod of the cylinder (3); it includes: rod body (41), sliding sleeve (42), limiting member (43), and spring (44); the top of the rod body (41) is fixedly connected to the piston rod; the limiting member (43) is inserted and fixed to the rod body (41); the sliding sleeve (42) is sleeved and slids on the rod body (41) and has a groove (42A) that matches the limiting member (43); the spring (44) is sleeved on the rod body (41), with its upper end abutting against the interface of the rod body (41) and its lower end abutting against the top surface of the sliding sleeve (42).

2. The riveting device for a dial zeroing gear according to claim 1, characterized in that, The fixed connection of the limiting member (43) to the rod body (41) can be adjusted up and down.

3. The riveting device for a dial zeroing gear according to claim 2, characterized in that, The position through which the limiting member (43) passes is a waist-shaped groove in the rod body (41); the limiting member (43) includes: a first stop rod (431) with a stud and a second stop rod (432) with a threaded hole.

4. The riveting device for a dial zeroing gear according to claim 1, characterized in that, The fixture (2) includes: a concave base (21), a positioning block (22), and two positioning strips (23); The positioning block (22) is fixedly connected to the horizontal part of the base (21) for the first horizontal support surface (2A) and the first vertical abutment surface (2D); The positioning strip is fixedly connected to the base (21) and is inclined, so as to be provided for the second horizontal support surface (2B) and the second vertical abutment surface (2E).

5. The riveting device for a dial zeroing gear according to claim 4, characterized in that, The closer to the positioning block (22), the smaller the distance between the two positioning strips (23).

6. The riveting device for a dial zeroing gear according to claim 4, characterized in that, The fixture (2) also includes: a plug rod (24); the closer to the positioning block (22), the greater the distance between the two positioning strips (23); the end of the positioning strip near the positioning block (22) is hinged to the base (21); the two longitudinal parts of the base (21) and the end of the positioning strip away from the positioning block (22) all have holes for the plug rod (24) to be inserted.

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