A drive shaft assembly device

Abstract

This utility model relates to a drive shaft assembly device, including a worktable, a bracket fixedly mounted on the top of the worktable, a hydraulic cylinder fixedly mounted on the top of the bracket, and a pressure ring fixedly mounted on the bottom of the hydraulic cylinder. The hydraulic cylinder is used to drive the pressure ring to move up and down. A through-hole receiving groove is provided in the middle of the front side of the worktable. The outer ring of the pressure ring is made into a threaded surface. A positioning fixture is detachably provided on the top of the worktable. A positioning sleeve is fixedly installed in the bottom of the receiving groove. An installation groove is provided in the middle of the front side of the worktable. A telescopic cylinder is installed on the right side of the installation groove. A fixed plate is slidably arranged in the installation groove. Crossbars are arranged at equal intervals on the left side of the fixed plate. The telescopic cylinder is used to drive the fixed plate to slide left and right. This device, by setting a fixed plate that moves left and right by the telescopic cylinder and multiple crossbars in the front side of the worktable, can restrict the middle section of the long shaft in the receiving groove and avoid the problem of the long shaft flying out and injuring people.

Description

Technical Field

[0001] This utility model relates to the field of shaft assembly, and in particular to a transmission shaft assembly device. Background Technology

[0002] A shaft is a type of shaft that withstands both bending and torque during rotation. It is widely used in various transmission systems. Gear shafts, as a type of shaft, are an important component of gear transmission systems. Generally, for gear shafts where the length-to-gear width ratio is less than 5, the shaft can be integrally machined. For shafts with a ratio greater than 5, the gear and shaft need to be machined separately and then assembled. The gear and shaft that make up the gear shaft have a transition fit, which presents certain assembly resistance. Currently, gear shaft assembly still relies on manual assembly processes using hammering and striking. Excessive hammering force, if the shaft and gear centerlines are not aligned, can easily cause damage to the mating surfaces, affecting the coaxiality of the gear and shaft, and making disassembly difficult. Insufficient hammering force cannot overcome the resistance of the transition fit, preventing installation and affecting assembly efficiency. In batch assembly lines, current assembly processes cannot achieve mechanized and continuous production, and the operators' workload is high. Furthermore, the automation level of existing shaft assembly equipment is not very high, making it prone to damage to the shaft.

[0003] Currently, Chinese patent CN222643692U discloses a drive shaft assembly and positioning device, including a stamping machine and a worktable. The stamping machine is fixedly mounted on the top of the worktable, and a positioning hole is provided in the middle of the worktable. A limiting receiving platform corresponding to the positioning hole is provided at the bottom of the worktable. An mounting plate is rotatably mounted on the punch of the stamping machine. The mounting plate is provided with positioning claws and pressing claws, and the mounting plate is an eccentric chuck. By adopting the above technical solution, the positioning claws and pressing claws provided on the eccentric chuck can be moved to the central axis position by the eccentric chuck, avoiding the center of gravity shift during the positioning or pressing process. This setting allows the device to automatically complete the positioning and pressing, avoiding the problem of needing to move the rotating shaft.

[0004] The aforementioned existing technical solutions have the following drawbacks: there is no bottom limit protection when assembling shaft parts with bearings, which may cause shaft parts to fly out during assembly in some cases, affecting the safety of operators. Utility Model Content

[0005] The purpose of this invention is to provide a drive shaft assembly device to solve the problems existing in the prior art.

[0006] The above-mentioned technical objective of this utility model is achieved through the following technical solution:

[0007] A drive shaft assembly device includes a worktable, a bracket fixedly mounted on the top of the worktable, a hydraulic cylinder fixedly mounted on the top of the bracket, and a pressure ring fixedly mounted on the bottom of the hydraulic cylinder. The hydraulic cylinder is used to drive the pressure ring to move up and down. A through-hole receiving groove is provided at the middle of the front side of the worktable. The outer ring of the pressure ring is set with a threaded surface. A positioning fixture is detachably provided on the top of the worktable. A positioning sleeve is fixedly mounted on the bottom of the receiving groove. An installation groove is provided at the middle of the front side of the worktable. A telescopic cylinder is installed on the right side inside the installation groove. A fixing plate is slidably arranged in the installation groove. Crossbars are arranged at equal intervals on the left side of the fixing plate. The telescopic cylinder is used to drive the fixing plate to slide left and right.

[0008] By adopting the above technical solution, the long shaft is vertically placed into the receiving groove during use. Both ends of the long shaft generally have protruding rings, allowing it to be directly suspended in the positioning fixture. Then, a bearing is inserted into the pressure ring, which presses the bearing into the top of the long shaft from top to bottom. Therefore, the pressure ring needs to be magnetized to give it a certain magnetic property. During the bearing pressing process, slight positional deviations or accidents may cause the hydraulic cylinder and the axis of the long shaft to shift. If the hydraulic cylinder continues to press down on the pressure ring, the bottom end of the long shaft will rotate. If it rotates inside the receiving groove, it's fine, but if it leaves the receiving groove without protection, it could fly out and injure someone. Therefore, this device uses a fixed plate that moves left and right via a telescopic cylinder and multiple crossbars on the front side of the worktable to confine the middle section of the long shaft within the receiving groove, preventing it from flying out and injuring someone.

[0009] In a further embodiment, the air inlet of the telescopic cylinder is connected to one end of an air intake pipe, and the other end of the air intake pipe is equipped with a foot switch.

[0010] By adopting the above technical solution, if the operator wants to put in or take out the long shaft, they need to step on the foot switch. The foot switch can be placed directly on the ground, and a protective shell is set on the top of the foot switch. One side of the protective shell is open, so that the operator's foot can be inserted into the protective shell to step on it. The protective shell is to prevent heavy objects from accidentally falling and hitting the foot switch, causing the foot switch to be stepped on during operation and the protection measure to fail. The protection measure refers to a structure composed of a telescopic cylinder, a fixed plate and a crossbar. Only when the operator steps on the switch will the fixed plate slide to the right, so that the crossbar opens the front end of the receiving groove. Once the operator releases the foot switch, the fixed plate will quickly slide to the left, so that the crossbar closes the front end of the receiving groove.

[0011] In a further embodiment, the positioning fixture includes a U-shaped frame with its open side facing forward. The top of the U-shaped frame is provided with a plurality of positioning holes, and the top of the worktable is provided with pin holes corresponding to the plurality of positioning holes around the top periphery of the receiving groove.

[0012] By adopting the above technical solution, since the lengths and diameters of different shafts are not the same, a U-shaped frame is installed on the top of the worktable for greater adaptability. The positioning holes and pin holes are matched to determine the position of the U-shaped frame relative to the worktable.

[0013] In a further embodiment, the positioning sleeve has a vertically oriented axis, and the interior of the positioning sleeve has multiple stepped surfaces arranged from top to bottom along its axial direction, with the diameter of the stepped surfaces decreasing sequentially from top to bottom.

[0014] By adopting the above technical solution, a bearing may be installed on the guide rod in actual use. At this time, the bottom end of the long shaft needs to be fixed. Generally speaking, the guide rod is not installed with a bearing. Therefore, the positioning sleeve is to allow long shafts of more sizes to be inserted into the positioning sleeve, avoiding frequent replacement of the positioning sleeve.

[0015] In a further embodiment, an infrared ranging sensor is provided at the outer top of the pressure ring, and the infrared ranging sensor is used to detect the distance between the bottom end of the pressure ring and the top of the worktable.

[0016] By adopting the above technical solution, higher precision installation can be achieved, which facilitates the gradual increase of the pressure applied by the hydraulic cylinder. As the assembly distance of the bearing increases, the contact area between the inner ring of the bearing and the long shaft increases, and the resistance increases, so it is necessary to gradually increase the installation pressure.

[0017] In a further embodiment, the control switch for the hydraulic cylinder is located to the right of the foot switch.

[0018] By adopting the above technical solution, since the human right foot is generally more flexible, the control switch of the hydraulic cylinder is set to the right of the foot switch. This allows the operator to only step on the foot switch or the control switch of the hydraulic cylinder when using the right foot to control it, thus achieving hierarchical control of the telescopic cylinder and the hydraulic cylinder, which cannot be performed simultaneously, further increasing the safety of the operator.

[0019] In summary, this utility model has the following beneficial effects:

[0020] 1. By setting a fixed plate that moves left and right via a telescopic cylinder and multiple crossbars on the front side of the workbench, the middle section of the long shaft is confined within the receiving groove, thus preventing the long shaft from flying out and causing injury. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0022] Figure 2 This is a structural schematic diagram illustrating the telescopic cylinder, fixing plate, and crossbar of this utility model.

[0023] In the diagram, 1 is the workbench; 2 is the support; 3 is the hydraulic cylinder; 4 is the pressure ring; 5 is the positioning fixture; 6 is the positioning sleeve; 7 is the fixing plate; 8 is the telescopic cylinder; 9 is the crossbar; 10 is the air inlet pipe; and 11 is the foot switch. Detailed Implementation

[0024] The present invention will be further described in detail below with reference to the accompanying drawings.

[0025] Identical parts are indicated by the same reference numerals. It should be noted that the terms "front," "rear," "left," "right," "upper," and "lower" used in the following description refer to the attached figures. Figure 1 In this specification, the terms "bottom surface" and "top surface," "inner" and "outer" refer to the direction toward or away from the geometry of a specific component. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this specification, "a plurality of" means two or more, unless otherwise explicitly and specifically defined by the direction of the center.

[0026] Example 1:

[0027] like Figures 1-2As shown, a drive shaft assembly device includes a worktable 1, a bracket 2 fixedly mounted on the top of the worktable 1, a hydraulic cylinder 3 fixedly mounted on the top of the bracket 2, and a pressure ring 4 fixedly mounted on the bottom of the hydraulic cylinder 3. The hydraulic cylinder 3 is used to drive the pressure ring 4 to move up and down. A through-hole receiving groove is provided in the middle of the front side of the worktable 1. The outer ring of the pressure ring 4 is made of thread. A positioning fixture 5 is detachably provided on the top of the worktable 1. A positioning sleeve 6 is fixedly installed in the bottom of the receiving groove. An installation groove is provided in the middle of the front side of the worktable 1. A telescopic cylinder 8 is installed on the right side of the installation groove. A fixing plate 7 is slidably arranged in the installation groove. Crossbars 9 are arranged at equal intervals on the left side of the fixing plate 7. The telescopic cylinder 8 is used to drive the fixing plate 7 to move left and right. The sliding telescopic cylinder 8 has an air inlet connected to one end of an air inlet pipe 10, and the other end of the air inlet pipe 10 is equipped with a foot switch 11; the positioning fixture 5 includes a U-shaped frame with the open side of the U-shaped frame facing forward, and multiple positioning holes are provided on the top of the U-shaped frame; the top of the worktable 1 has pin holes corresponding to the multiple positioning holes around the top periphery of the receiving groove; the positioning sleeve 6 is vertically oriented, and multiple stepped surfaces are provided inside the positioning sleeve 6 along its axial direction from top to bottom, with the diameter of the stepped surfaces decreasing from top to bottom; an infrared ranging sensor is provided on the top of the outer side of the pressure ring 4, and the infrared ranging sensor is used to detect the distance between the bottom end of the pressure ring 4 and the top of the worktable 1; the control switch of the hydraulic cylinder 3 is located to the right of the foot switch 11.

[0028] Specific implementation process: During use, the long shaft is vertically placed into the receiving groove. Both ends of the long shaft are generally equipped with protruding rings, so it can be directly suspended in the positioning fixture. Then, the bearing is inserted into the pressure ring, and the ring presses the bearing into the top of the long shaft from top to bottom. Therefore, the pressure ring needs to be magnetized to give it a certain magnetic properties. During the pressing of the bearing, due to slight positional deviations or accidents, the axis of the hydraulic cylinder and the long shaft may be misaligned. When the hydraulic cylinder continues to press down on the pressure ring, it will cause the bottom end of the long shaft to rotate. If it rotates inside the receiving groove, it is fine, but if it leaves the receiving groove without protection, it may fly out and injure people. Therefore, this device uses a fixed plate that moves left and right by a telescopic cylinder and multiple crossbars on the front side of the worktable to restrict the middle section of the long shaft within the receiving groove, thus preventing the long shaft from flying out and injuring people.

[0029] In the embodiments disclosed in this utility model, the terms "installation," "connection," "linking," and "fixing" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; "linking" can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments disclosed in this utility model according to the specific circumstances.

[0030] This specific embodiment is merely an explanation of the present utility model and is not intended to limit the present utility model. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but as long as they are within the scope of the claims of the present utility model, they are protected by patent law.

Claims

1. A drive shaft assembly device, characterized in that: The system includes a workbench (1), a bracket (2) fixedly mounted on the top of the workbench (1), a hydraulic cylinder (3) fixedly mounted on the top of the bracket (2), a pressure ring (4) fixedly mounted on the bottom of the hydraulic cylinder (3), and the hydraulic cylinder (3) is used to drive the pressure ring (4) to move up and down; a through-hole receiving groove is provided in the middle of the front side of the workbench (1), the outer ring of the pressure ring (4) is set as a threaded surface, a positioning fixture (5) is detachably provided on the top of the workbench (1), a positioning sleeve (6) is fixedly installed in the bottom of the receiving groove, an installation groove is provided in the middle of the front side of the workbench (1), a telescopic cylinder (8) is installed in the right side of the installation groove, a fixed plate (7) is slidably provided in the installation groove, and crossbars (9) are provided at equal intervals on the left side of the fixed plate (7), and the telescopic cylinder (8) is used to drive the fixed plate (7) to slide left and right.

2. The drive shaft assembly device according to claim 1, characterized in that: The air inlet of the telescopic cylinder (8) is connected to one end of the air inlet pipe (10), and the other end of the air inlet pipe (10) is equipped with a foot switch (11).

3. The drive shaft assembly device according to claim 1, characterized in that: The positioning fixture (5) includes a U-shaped frame with the opening side facing forward. The top of the U-shaped frame is provided with multiple positioning holes. The top of the worktable (1) is provided with pin holes corresponding to the multiple positioning holes around the top edge of the receiving groove.

4. The drive shaft assembly device according to claim 1, characterized in that: The positioning sleeve (6) is vertically oriented, and the interior of the positioning sleeve (6) has multiple stepped surfaces arranged from top to bottom along its axial direction, with the diameter of the stepped surfaces decreasing sequentially from top to bottom.

5. The drive shaft assembly device according to claim 1, characterized in that: An infrared ranging sensor is provided at the top outer side of the pressure ring (4), and the infrared ranging sensor is used to detect the distance between the bottom end of the pressure ring (4) and the top of the worktable (1).

6. The drive shaft assembly device according to claim 2, characterized in that: The control switch for the hydraulic cylinder (3) is located to the right of the foot switch (11).

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