Valve rod locking tool

Abstract

The utility model discloses a valve rod locking tool which comprises a positioning table, a plurality of positioning grooves are formed in the top face of the positioning table, one end of each positioning groove is open, the other end of each positioning groove is closed, a lead screw and a guide rod are arranged on the upper portion in each positioning groove, the lead screws are rotationally connected with the side walls of the positioning grooves, and the guide rods are fixedly connected with the side walls of the positioning grooves. Reverse threads are arranged on the two sides of the lead screws, clamping plates are connected to the two sides of the lead screws in a threaded mode, the distances between the two clamping plates and the center of the lead screws are equal, the ends, away from the lead screws, of the clamping plates are slidably connected with the guide rods, and a driving mechanism for driving the lead screws in all the positioning grooves to rotate simultaneously is arranged in the positioning table. All the lead screws are controlled to rotate at the same time through the driving mechanism, so that the two clamping plates in the positioning groove can be driven to move relatively to clamp the valve rod, namely, the driving mechanism can control all the clamping plates to move, the cost is reduced, and the efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of positioning tooling, in particular to a valve stem locking tooling. Background Art

[0002] like Figure 4 The figure shows a schematic diagram of a valve stem, which has a stem and a head. The head is provided with a connecting hole. When processing the head of the valve stem, the stem needs to be fixed, so a positioning tool is required. However, the current valve stem positioning tool has the following problems: (1) It can only fix one valve stem at a time, and cannot fix valve stems in batches, resulting in low valve stem processing efficiency; if multiple valve stems need to be fixed at the same time, multiple sets of clamping parts are required, and each set of clamping parts is equipped with a drive part to control its operation, resulting in high costs; (2) The valve stem is clamped only by the clamping mechanism, and the valve stem cannot be pressed while clamping, resulting in unstable valve stem during processing. Utility Model Content

[0003] In view of the deficiencies in the prior art, the present invention provides a valve stem locking tool to solve the problems mentioned in the above background technology.

[0004] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0005] A valve stem locking tool comprises a positioning platform, the top surface of which is provided with a plurality of positioning grooves, one end of the positioning groove is open and the other end is closed, a screw rod and a guide rod are provided in the upper part of each positioning groove, the screw rod is rotatably connected to the side wall of the positioning groove, the guide rod is fixedly connected to the side wall of the positioning groove, opposite threads are provided on both sides of the screw rod, and splints are threadedly connected on both sides of the screw rod, the distances between the two splints and the center of the screw rod are equal, the end of the splint away from the screw rod is slidably connected to the guide rod, and a driving mechanism is provided in the positioning platform for driving the screw rods in all the positioning grooves to rotate simultaneously.

[0006] Preferably, a cavity is provided next to each positioning groove in the positioning platform, and the driving mechanism includes a first transmission rod rotatably connected to the cavity, a first bevel gear and a second bevel gear connected to the first transmission rod, and a third bevel gear connected to one end of the screw rod, and the first bevel gear is meshed with the third bevel gear. The driving mechanism also includes a second transmission rod rotatably connected to the positioning platform, a fourth bevel gear connected to the second transmission rod and meshed with the second bevel gear, and a motor installed on the outside of the positioning platform and transmission-connected to the second transmission rod.

[0007] In the above technical solution, after one end of the valve stem is inserted into the positioning groove, the motor is started to drive the second transmission rod to rotate. The second transmission rod drives all the first transmission rods to rotate through the cooperation between the fourth bevel gear and the second bevel gear. The first transmission rod drives the screw rod to rotate through the cooperation between the first bevel gear and the third bevel gear, so that one motor can control the rotation of all screw rods.

[0008] Preferably, grooves are provided on both sides of the positioning slot, and the splints are hidden in the grooves.

[0009] In the above technical solution, when the splint is not in use, the splint is hidden in the groove, which makes it easy to insert a valve stem with a larger diameter.

[0010] Preferably, a clamping mechanism is provided above each positioning slot on the positioning platform, comprising a bracket connected to the positioning platform and located above the positioning slot, a cylinder mounted on the bracket, and a pressure rod connected to the telescopic end of the cylinder, the pressure rod being located above the positioning slot.

[0011] The above technical solution clamps the valve stem through the clamping plate, and then controls the cylinder to extend, driving the pressure rod to descend, and the valve stem is pressed tightly into the positioning groove through the pressure rod, so that the valve stem is further stabilized.

[0012] Preferably, the positioning platform is located above the cavity and is connected to a cover plate via screws.

[0013] According to the above technical solution, the cover plate can be opened to inspect the driving mechanism, thereby facilitating maintenance of the driving mechanism.

[0014] Compared with the prior art, the beneficial effects of the present invention are:

[0015] (1) Each positioning groove can hold a valve stem, and a positioning platform can hold multiple valve stems simultaneously, which improves the efficiency of valve stem processing. After the valve stem is inserted into the positioning groove, a set of drive mechanisms controls all the screws to rotate simultaneously, thereby driving the two clamping plates in the positioning groove to move relative to each other to clamp the valve stem. In other words, a set of drive mechanisms can control the movement of all the clamping plates, reducing costs and improving efficiency.

[0016] (2) After the valve stem is clamped by the clamping plate, the clamping mechanism can press it tightly into the positioning groove from the top surface of the valve stem, and the four sides of the valve stem are clamped, so that the valve stem remains stable enough to facilitate processing. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A schematic diagram of the present utility model;

[0018] Figure 2 It is a top sectional view of the utility model;

[0019] Figure 3It is a partial front view of the utility model;

[0020] Figure 4 is a schematic diagram of the valve stem;

[0021] In the figure: 1-positioning table, 2-positioning groove, 3-screw, 4-guide rod, 5-clamping plate, 6-cavity, 7-first transmission rod, 8-first bevel gear, 9-second bevel gear, 10-third bevel gear, 11-second transmission rod, 12-fourth bevel gear, 13-motor, 14-groove, 15-bracket, 16-cylinder, 17-pressure rod, 18-cover plate, 19-valve stem. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0023] Example 1

[0024] See also Figure 1-3 , a valve stem locking tooling includes a positioning platform 1, the top surface of the positioning platform 1 is provided with a plurality of positioning grooves 2, one end of the positioning groove 2 is open and the other end is closed, a screw rod 3 and a guide rod 4 are provided on the upper part of each positioning groove 2, the screw rod 3 is rotatably connected to the side wall of the positioning groove 2, and the guide rod 4 is fixedly connected to the side wall of the positioning groove 2, opposite threads are provided on both sides of the screw rod 3, and splints 5 are threadedly connected on both sides of the screw rod 3, the distances between the two splints 5 and the center of the screw rod 3 are equal, and the end of the splint 5 away from the screw rod is slidably connected to the guide rod 4, a cavity 6 is provided next to each positioning groove in the positioning platform 1, and a driving mechanism for driving all the screw rods 3 to rotate simultaneously is provided in the positioning platform 1.

[0025] Specifically, the driving mechanism includes a first transmission rod 7 rotatably connected to the cavity, a first bevel gear 8 and a second bevel gear 9 connected to the first transmission rod, and a third bevel gear 10 connected to one end of the screw rod, wherein the first bevel gear 8 is meshed with the third bevel gear 10. The driving mechanism also includes a second transmission rod 11 rotatably connected to the positioning platform, a fourth bevel gear 12 connected to the second transmission rod and meshed with the second bevel gear, and a motor 13 installed on the outside of the positioning platform and connected to the second transmission rod. After one end of the valve stem is inserted into the positioning groove, the motor 13 is started to drive the second transmission rod 11 to rotate. The second transmission rod 11 drives all the first transmission rods 7 to rotate through the cooperation of the fourth bevel gear 12 and the second bevel gear 9. The first transmission rod 7 drives the screw rod 3 to rotate through the cooperation of the first bevel gear 8 and the third bevel gear 10, so that one motor 13 can control the rotation of all the screw rods 3.

[0026] The two sides of the positioning groove 2 are provided with grooves 14, and the clamping plate 5 is hidden in the grooves 14. When the clamping plate 5 is not in use, the clamping plate 5 is hidden in the grooves 14, which can facilitate the insertion of a valve stem with a larger diameter. When inserting the valve stem, the valve stem is inserted between the two clamping plates.

[0027] The positioning platform 1 is located above the cavity and is connected to a cover plate 18 by screws. The cover plate can be opened to inspect the drive mechanism, thereby facilitating the maintenance of the drive mechanism.

[0028] The working principle of this embodiment is:

[0029] Insert the valve stem 19 into the positioning groove 2 with the head of the valve stem 19 facing outward, and then start the motor 13 to drive the second transmission rod 11 to rotate. The second transmission rod 11 drives all the first transmission rods 7 to rotate through the cooperation of the fourth bevel gear 12 and the second bevel gear 9. The first transmission rod 7 drives all the screw rods 3 to rotate simultaneously through the cooperation of the first bevel gear 8 and the third bevel gear 10, thereby driving the two splints 5 in the positioning groove to move relative to each other to clamp the valve stem 19.

[0030] Example 2

[0031] This embodiment differs from Example 1 in that a clamping mechanism is provided on the positioning platform 1 above each positioning slot 2. The clamping mechanism comprises a bracket 15 connected to the positioning platform and located above the positioning slot, a cylinder 16 mounted on the bracket, and a pressure rod 17 connected to the telescopic end of the cylinder. The pressure rod 17 is located above the positioning slot 2. After the valve stem 19 is clamped by the clamping plate 5, the cylinder 16 is controlled to extend, driving the pressure rod 17 downward. The pressure rod 17 then presses the valve stem tightly against the positioning slot 2, further stabilizing the valve stem.

[0032] It should be noted that the terms "comprises," "includes," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a process, method, article, or apparatus that includes a series of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus. In the absence of further limitations, an element defined by the phrase "comprises a ..." does not preclude the presence of other identical elements in the process, method, article, or apparatus that includes the element.

[0033] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A valve stem locking tool, characterized by: The invention comprises a positioning platform (1), wherein the top surface of the positioning platform (1) is provided with a plurality of positioning grooves (2), one end of the positioning groove (2) is open and the other end is closed, a threaded rod (3) and a guide rod (4) are provided on the upper part of each positioning groove (2), the threaded rod (3) is rotatably connected to the side wall of the positioning groove (2), the guide rod (4) is fixedly connected to the side wall of the positioning groove (2), opposite threads are provided on both sides of the threaded rod (3), and clamping plates (5) are threadedly connected to both sides of the threaded rod (3), the distances between the two clamping plates (5) and the center of the threaded rod (3) are equal, and the end of the clamping plate (5) away from the threaded rod is slidably connected to the guide rod (4), and a driving mechanism for driving all the threaded rods (3) to rotate simultaneously is provided in the positioning platform (1); and a pressing mechanism is provided on the positioning platform (1) above each positioning groove (2).

2. The valve stem locking tool according to claim 1, characterized in that: The positioning platform (1) is provided with a cavity (6) next to each positioning groove. The driving mechanism includes a first transmission rod (7) rotatably connected to the cavity, a first bevel gear (8) and a second bevel gear (9) connected to the first transmission rod, and a third bevel gear (10) connected to one end of the screw rod. The first bevel gear (8) is meshed with the third bevel gear (10). The driving mechanism also includes a second transmission rod (11) rotatably connected to the positioning platform, a fourth bevel gear (12) connected to the second transmission rod and meshed with the second bevel gear, and a motor (13) installed outside the positioning platform and transmission-connected to the second transmission rod.

3. The valve stem locking tool according to claim 2, characterized in that: Grooves (14) are provided on both sides of the positioning groove (2), and the clamping plate (5) is hidden in the grooves (14).

4. The valve stem locking tool according to claim 3, characterized in that: The pressing mechanism comprises a bracket (15) connected to the positioning platform and located above the positioning slot, a cylinder (16) installed on the bracket, and a pressure rod (17) connected to the telescopic end of the cylinder, wherein the pressure rod (17) is located above the positioning slot (2).

5. The valve stem locking tool according to claim 4, characterized in that: The positioning platform (1) is located above the cavity and is connected to a cover plate (18) via screws.

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