An assembly fixture for a chain tensioner assembly

Abstract

This utility model discloses an assembly fixture for chain tensioner assemblies, belonging to the field of assembly fixtures. It includes a worktable, on which a main shaft and a power component are rotatably connected. A guide block is fixedly connected to the main shaft, and a rotating mechanism is movably mounted on the main shaft. The rotating mechanism includes a turntable, and a first spring is installed between the guide block and the turntable. The advantages are: the inclusion of a vertically movable turntable, a vibration mechanism, and a striking mechanism allows each chain tensioner assembly to move within the assembly tube along with the turntable. During the turntable's rotation, the striking mechanism automatically strikes the chain tensioner assemblies for assembly. Furthermore, the fixed head and fixed block ensure that the assembled chain tensioner vibrates to a certain amplitude, reducing assembly force, minimizing wear on mating surfaces, and improving the assembly effect between components.

Description

Technical Field

[0001] This utility model relates to the field of assembly tooling, and in particular to an assembly tooling for a chain tensioner assembly. Background Technology

[0002] The chain tensioner is a core component of the timing transmission system of an automobile engine. It is mainly responsible for guiding and dynamically tensioning the timing belt or chain to maintain the optimal tension. The plunger assembly in the chain tensioner is composed of a base, steel balls, ring plates and a cap, which are assembled and pressed together in sequence. However, the pressing process requires manual operation and hammering with heavy objects to assemble, which is cumbersome and laborious.

[0003] A search revealed that Chinese Patent Publication No. CN207888542U discloses an assembly fixture for a rotary chain tensioner assembly. This patent includes a mounting plate with an arched frame on the mounting plate. A single-column pneumatic compressor is mounted on the arched frame. A pressure head is mounted on the telescopic column of the single-column pneumatic compressor. The mounting plate also has a rotating shaft with a turntable rotatably connected to the rotating shaft. The turntable has several cylindrical grooves arranged in an equiangular annular array; one of the cylindrical grooves is located directly below the pressure head. This device uses a single-column pneumatic press to press together a plunger assembly consisting of a bottom column, steel balls, ring plates, and a plunger cap. The plunger assembly is placed in a cylindrical groove on a turntable, which facilitates the installation of the plunger assembly and makes rotation and switching convenient. It eliminates the disadvantages of manual hammering, is labor-saving, and has a high yield rate after assembly. However, the current assembly tooling for chain tensioner assemblies requires a high degree of coordination between the hammering component and the movement of the chain tensioner assembly. Furthermore, the hammering assembly method generates a large assembly force between the chain tensioner components, which increases friction and damage to the components and affects the assembly effect. Utility Model Content

[0004] The purpose of this invention is to provide an assembly fixture for a chain tensioner assembly in order to solve the above-mentioned problems.

[0005] This utility model achieves the above objectives through the following technical solutions: An assembly fixture for a chain tensioner assembly includes a worktable, on which a main shaft and a power component are rotatably connected. A guide block is fixedly connected to the main shaft, and a rotating mechanism is movably mounted on the main shaft. The rotating mechanism includes a turntable, and a first spring is installed between the main shaft and the turntable. The turntable is slidably connected to the main shaft and the guide block. Several assembly tubes arranged in a ring are fixedly connected to the turntable. The assembly tubes are used to accommodate various components of the chain tensioner. A vibration mechanism is provided on the worktable, and the vibration mechanism includes a fixed block with an inclined surface at the top. Several sets of fixed heads that cooperate with the fixed block are fixedly connected to the bottom of the turntable. A striking mechanism is provided on the worktable, and the striking mechanism includes a mounting frame with several sets of striking components movably mounted on the mounting frame. The striking components can strike the components in the assembly tubes for assembly as the turntable rotates.

[0006] Preferably, the striking assembly includes a lifting rod that is slidably connected to the top of the mounting frame, a second spring that is installed between the lifting rod and the mounting frame, a striking block that is fixedly connected to the bottom of the mounting frame, and a number of evenly distributed wedge-shaped blocks that are fixedly connected to the top of the turntable.

[0007] Preferably, the lifting rods are arranged in a ring, with the center point of the ring arrangement located on the axis of the main shaft.

[0008] Preferably, the bottom two sides of the striking block are rotatably connected to a rotating shaft.

[0009] Preferably, the top of the assembly tube is higher than the top of the turntable, and the bottom of the rotating shaft is lower than the bottom of the striking block.

[0010] Preferably, the assembly tube has a bottom hole, the turntable has several insertion holes at the bottom, the insertion holes and the bottom hole are on the same vertical line, an elastic telescopic rod is fixedly connected to the worktable, and an ejector block is fixedly connected to the top of the elastic telescopic rod.

[0011] The beneficial effects are as follows: a turntable that moves up and down, a vibration mechanism, and a striking mechanism are set up. As each chain tensioner component to be assembled moves with the turntable inside the assembly tube, the striking mechanism can automatically strike the chain tensioner components during the rotation of the turntable. Furthermore, due to the setting of the fixed head and the fixed block, the assembled chain tensioner can generate a certain amplitude of vibration, reduce the assembly force, reduce the wear of the mating surfaces, and make the assembly effect between the components better.

[0012] The additional technical features and advantages of this utility model will become more apparent from the following description, or may be learned through specific practice of this utility model. Attached Figure Description

[0013] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the following detailed description to explain the present invention, but do not constitute a limitation thereof. In the drawings: Figure 1 This is a schematic diagram of the assembly fixture for a chain tensioner assembly according to the present invention; Figure 2 This is a sectional view of the turntable of the assembly fixture for a chain tensioner assembly according to the present invention; Figure 3 This is a schematic diagram of the rotating mechanism structure of the assembly fixture for a chain tensioner assembly according to the present invention; Figure 4 This is a schematic diagram of the bottom angle of the rotating mechanism of the assembly fixture for a chain tensioner assembly according to the present invention; Figure 5 This is a schematic diagram of the striking mechanism structure of the assembly fixture for a chain tensioner assembly according to the present invention; Figure 6 This is a schematic diagram of the assembly tube and the elastic telescopic rod of the assembly tooling for the chain tensioner assembly described in this utility model.

[0014] The reference numerals in the attached drawings are explained as follows: 101, worktable; 102, spindle; 103, guide block; 104, elastic telescopic rod; 105, ejector block; 106, first spring; 201, turntable; 202, assembly tube; 203, bottom hole; 204, insertion hole; 205, wedge block; 301, fixing head; 302, fixing block; 303, inclined plane; 401, mounting bracket; 402, lifting rod; 403, second spring; 404, striking block; 405, rotating shaft. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0016] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0017] The present invention will be further described below with reference to the accompanying drawings: like Figure 1 — Figure 6As shown, an assembly fixture for a chain tensioner assembly includes a worktable 101. A main shaft 102 and a power assembly are rotatably connected to the worktable 101. The power assembly is located inside the worktable 101 (not shown in the figure) and can drive the main shaft 102 to rotate periodically at a certain angle. A guide block 103 is fixedly connected to the main shaft 102. The main shaft 102 and the guide block 103 are integrally formed. A rotating mechanism is movably arranged on the main shaft 102. The rotating mechanism includes a turntable 201. A first spring 106 is installed between the main shaft 102 and the turntable 201. The two ends of the first spring 106 are respectively fixedly connected to the turntable 201 and the guide block 103 and sleeved on the main shaft 102. 01 Sliding connection between the main shaft 102 and the guide block 103. Several ring-shaped assembly tubes 202 are bolted to the turntable 201. The assembly tubes 202 are used to accommodate the various components of the chain tensioner. A vibration mechanism is provided on the worktable 101. The vibration mechanism includes a fixed block 302. The top of the fixed block 302 is provided with an inclined surface 303. Several sets of fixed heads 301 that cooperate with the fixed block 302 are bolted to the bottom of the turntable 201. A striking mechanism is provided on the worktable 101. The striking mechanism includes a mounting frame 401. Several sets of striking components are movably arranged on the mounting frame 401. The striking components can strike and assemble the components in the assembly tubes 202 as the turntable 201 rotates.

[0018] In this embodiment, the striking assembly includes a lifting rod 402, which is slidably connected to the top of the mounting frame 401. A second spring 403 is installed between the lifting rod 402 and the mounting frame 401, and the second spring 403 is sleeved on the lifting rod 402. A striking block 404 is bolted to the bottom of the mounting frame 401, and a plurality of annularly distributed wedge blocks 205 are bolted to the top of the turntable 201. When the turntable 201 rotates counterclockwise with the main shaft 102, the wedge blocks 205 can push the striking block 404 and the lifting rod 402 to move upward, and cause the second spring 403 to stretch and accumulate elastic potential energy. When the striking block 404 passes the highest point of the wedge block 205, the elastic potential energy of the second spring 403 is released, and the striking block 404 strikes and assembles the chain tensioner assembly in the assembly tube 202.

[0019] In this embodiment, the lifting rods 402 are arranged in a ring, and the center point of the ring arrangement of the lifting rods 402 is located on the axis of the main shaft 102. The arrangement of multiple lifting rods 402 enables the striking block 404 to strike the chain tensioner assembly multiple times, ensuring the assembly effect.

[0020] In this embodiment, the bottom two sides of the striking block 404 are rotatably connected to the rotating shaft 405. The rotating shaft 405 enables the striking block 404 to move more smoothly upward along the wedge block 205, reducing friction and preventing jamming.

[0021] In this embodiment, the top of the assembly tube 202 is higher than the top of the turntable 201, and the bottom of the rotating shaft 405 is lower than the bottom of the striking block 404. When the striking block 404 is lowered to the low position, the rotating shaft 405 will be located on both sides of the top of the assembly tube 202 to prevent the setting of the rotating shaft 405 from affecting the striking force of the striking block 404 on the chain tensioner assembly.

[0022] In this embodiment, the bottom of the assembly tube 202 is provided with a bottom hole 203, and the bottom of the turntable 201 is provided with a plurality of insertion holes 204. The insertion holes 204 and the bottom hole 203 are on the same vertical line. An elastic telescopic rod 104 is bolted to the worktable 101, and an ejector block 105 is bolted to the top of the elastic telescopic rod 104. When the striking block 404 strikes the assembly tube 202 and the chain tensioner assembly, the turntable 201 will move downward relative to the main shaft 102, and the first spring 106 will extend. At this time, the chain tensioner assembly assembled at the position of the elastic telescopic rod 104 will be ejected by the ejector block 105, thereby making it convenient for the workers to remove the assembled chain tensioner assembly.

[0023] Working principle: When using this device, the operator places the bottom post, steel ball, ring plate, and post cap from the chain tensioner assembly into the assembly tube 202 in sequence, with the top post cap protruding from the assembly tube 202. The power assembly of the main shaft 102 is then activated, causing the main shaft 102 and guide block 103 to drive the turntable 201 to rotate. As the turntable 201 rotates, the wedge block 205 pushes the striking block 404 and lifting rod 402 upwards, causing the second spring 403 to extend and accumulate elastic potential energy. When the striking block 404 passes the highest point of the wedge block 205, the elastic potential energy of the second spring 403 is released, and the striking block 404 strikes the chain tensioner assembly inside the assembly tube 202. Furthermore, due to the setting of the fixed head 301 and the fixed block 302, the turntable 201 vibrates to a certain extent, which helps to weaken the assembly force generated between the components by the hammering and reduce assembly wear. After the chain tensioner is assembled, it finally reaches the position above the elastic telescopic rod 104. At this time, the hammering block 404 will hammer the assembly tube 202 and the chain tensioner assembly. The turntable 201 moves downward relative to the main shaft 102, and the first spring 106 extends. At this time, the chain tensioner assembly assembled at the position of the elastic telescopic rod 104 will be pushed out by the ejector block 105, so that the workers can easily remove the assembled chain tensioner assembly. The assembly operation of the chain tensioner assembly is carried out in this way.

[0024] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. An assembly fixture for a chain tensioner assembly, comprising a worktable (101), on which a main shaft (102) and a power assembly are rotatably connected, a guide block (103) is fixedly connected, and a rotating mechanism is movably disposed on the main shaft (102), characterized in that: The rotating mechanism includes a turntable (201), a first spring (106) is installed between the main shaft (102) and the turntable (201), the turntable (201) is slidably connected to the main shaft (102) and the guide block (103), and a plurality of annularly arranged assembly tubes (202) are fixedly connected to the turntable (201). The assembly tubes (202) are used to accommodate the various components of the chain tensioner. A vibration mechanism is provided on the worktable (101), and the vibration mechanism includes a fixed block. (302), the top of the fixed block (302) is provided with an inclined surface (303), and the bottom of the turntable (201) is fixedly connected with a number of fixed heads (301) that cooperate with the fixed block (302). The workbench (101) is provided with a striking mechanism, which includes a mounting frame (401). A number of striking components are movably arranged on the mounting frame (401). The striking components can strike and assemble the components in the assembly tube (202) as the turntable (201) rotates.

2. The assembly fixture for a chain tensioner assembly according to claim 1, characterized in that: The striking assembly includes a lifting rod (402), which is slidably connected to the top of the mounting frame (401). A second spring (403) is installed between the lifting rod (402) and the mounting frame (401). A striking block (404) is fixedly connected to the bottom of the mounting frame (401). A plurality of evenly distributed wedge-shaped blocks (205) are fixedly connected to the top of the turntable (201).

3. The assembly fixture for a chain tensioner assembly according to claim 2, characterized in that: The lifting rods (402) are arranged in a ring, and the center point of the ring arrangement of the lifting rods (402) is located on the axis of the main shaft (102).

4. The assembly fixture for a chain tensioner assembly according to claim 3, characterized in that: The bottom two sides of the striking block (404) are rotatably connected to rotating shafts (405).

5. The assembly fixture for a chain tensioner assembly according to claim 4, characterized in that: The top of the assembly tube (202) is higher than the top of the turntable (201), and the bottom of the rotating shaft (405) is lower than the bottom of the striking block (404).

6. The assembly fixture for a chain tensioner assembly according to claim 1, characterized in that: The assembly tube (202) has a bottom hole (203) at the bottom, and the turntable (201) has several insertion holes (204) at the bottom. The insertion holes (204) and the bottom hole (203) are on the same vertical line. An elastic telescopic rod (104) is fixedly connected to the worktable (101), and an ejector block (105) is fixedly connected to the top of the elastic telescopic rod (104).

Images