Needle bar frame

Abstract

The utility model discloses a needle bar frame which comprises a needle bar frame body and at least one needle bar installed on the needle bar frame body, each needle bar is provided with an upper dead center block, each upper dead center block is provided with a fixing structure fixed to the corresponding needle bar, and the needle bar frame body is provided with a spring used for stopping the corresponding upper dead center block at a proper position of a preset position. Or / and a spring which is matched with the needle bar frame body and stops the upper dead center block at a proper position of the preset position is arranged on the upper dead center block. The elastic deformation compression range of the spring is large, the elastic coefficient is stable, and the spring with the proper elastic coefficient K value can be selected conveniently. Under the condition that the movement range of the needle rod is allowed, the length of the spring can be properly increased as much as possible, and the spring is arranged to replace an existing elastic cushion body, so that the working difficulty of mounting the upper dead center block by an operator can be reduced, and the cost of mounting fault tolerance of the upper dead center block can be greatly increased. And the top dead center blocks can be conveniently and quickly mounted in batches.

Description

Technical Field

[0001] This utility model relates to a needle bar holder. Background Technology

[0002] After the needle bar holder of the embroidery machine is installed, in order to facilitate the smooth engagement of the slot on the needle bar drive block with the protrusion on the needle bar, thereby driving the needle bar to work, within the allowable tolerance range, the position where the needle bar spring-driven needle bar naturally stops in its idle state is usually flush with or slightly lower than the upper stop position of the needle bar drive block driving the needle bar upward. This position is usually the preset position of the needle bar. The upper stop surface of the inner frame of the needle bar holder is provided with an elastic pad, and the needle bar is provided with an upper stop block that mates with the elastic pad.

[0003] To ensure the needle bar remains stationary in a preset position during idle operation, the operator typically needs to manually rotate the main shaft during installation and adjustment. This drives the needle bar drive block on the machine head to raise the needle bar to its upper stop point. Based on installation experience, the operator uses skillful force to push the upper stop block upwards on the needle bar, causing it to elastically compress the elastic pad and secure itself. The installation and adjustment of the upper stop block relies entirely on the operator's experience. Even when the same worker installs different needle bars on the same needle bar frame, variations may occur.

[0004] Furthermore, due to the small elastic deformation range of the elastic pad and its large or unstable elastic coefficient K value, the tolerance for the misalignment of the upper stop block and the needle bar is low. Therefore, operators are required to minimize the error of the upper stop blocks of different needle bars on the embroidery machine needle bar holder. If the operator applies too much pressure to the upper stop blocks of different needle bars, the elastic coefficient of the elastic pad at the mating point of the upper stop blocks of different needle bars will differ, causing the needle bar to not be accurately positioned in the preset location. This significantly increases the cost of installation and debugging. Summary of the Invention

[0005] This invention addresses the problem that existing needle bar holders using elastic pads to stop the needle bar have low fault tolerance and high operational requirements during installation and debugging. It provides a needle bar holder that is easy to operate and has improved fault tolerance.

[0006] The technical solution of this invention to solve the existing problems is: a needle bar holder, including a needle bar holder body and at least one needle bar mounted on the needle bar holder body, wherein each needle bar is provided with an upper stop block, and the upper stop block is provided with a fixing structure fixed to the needle bar. As an improvement, the needle bar holder body is provided with a spring that stops the upper stop block at a predetermined position, or / and the upper stop block is provided with a spring that cooperates with the needle bar holder body and stops the upper stop block at a predetermined position; the predetermined position satisfies that the position where the needle bar stops in its natural idle state is level with or slightly lower than the upper stop position of the needle bar when it moves upward, and does not affect the position that cooperates with the needle bar drive block.

[0007] As a further improvement, the spring is a helical spring.

[0008] As a further improvement, the needle bar holder body is provided with a mounting hole for installing a spring, and / or the upper stop is provided with a mounting hole for installing a spring.

[0009] As a further improvement, the spring is provided with a stop block.

[0010] As a further improvement, the spring is positioned at a corresponding location on the needle bar holder.

[0011] As a further improvement, the inner frame of the needle bar holder body is provided with mounting holes at the corresponding positions of the upper stop surface and the upper stop block, and the spring is provided in the mounting holes. The spring is provided with a stop block that stops the upper stop block at a preset position.

[0012] Compared with existing technologies, this invention features a spring on the needle bar holder body that stops the upper stop block at a predetermined position, or / and a spring on the upper stop block that cooperates with the needle bar holder body and stops the upper stop block at a predetermined position. The spring has a large elastic deformation compression range, a relatively stable elastic coefficient, and facilitates the selection of a suitable elastic coefficient K value. When the needle bar's range of motion allows, by appropriately increasing the spring length, a larger elastic deformation compression range can be controlled, and a suitable elastic coefficient K value can be easily selected, allowing for greater tolerance in the installation of the upper stop block and accommodating the range of needle bar movement. Its advantages include reducing the difficulty of installing the upper stop block for operators by using a spring instead of the existing elastic pad, and significantly increasing the cost of error tolerance in upper stop block installation. It also facilitates rapid, batch installation of the upper stop block. Attached Figure Description

[0013] Figure 1 This is a front view structural diagram of this utility model.

[0014] Figure 2 This is a three-dimensional structural diagram of the present invention.

[0015] Figure 3 This is a half-sectional schematic diagram of the needle bar holder of this utility model.

[0016] Figure 4 yes Figure 3 An enlarged schematic diagram of point a. Detailed Implementation

[0017] See Figure 1-4This embodiment discloses a needle bar holder, including a needle bar holder body 1 and at least one needle bar 2 mounted on the needle bar holder body 1. Each needle bar 2 is provided with an upper stop block 3, and the upper stop block 3 is provided with a fixing structure fixed to the needle bar 2. The fixing structure for fixing the upper stop block 3 can completely adopt the existing technology structure.

[0018] The needle bar holder body 1 is provided with a spring 4 that stops the upper stop block 3 at a predetermined position, or / and the upper stop block 3 is provided with a spring 4 that cooperates with the needle bar holder body 1 and stops the upper stop block 3 at a predetermined position. That is, the spring 4 can be set on the needle bar holder body 1, or on the upper stop block 3, or simultaneously on both the needle bar holder body 1 and the upper stop block 3. The length and elastic coefficient of the spring 4 can be selected using known existing technologies, specifically to ensure that the spring 4 can stop the needle bar 2 from being stopped in a naturally idle state at a predetermined position. By setting the spring 4, it is easy to select a spring with a suitable spring compression length greater than that of the existing elastic pad and a smaller elastic coefficient. In this way, when the operator uses the existing method to fix the position of the upper stop block 3, the position of the upper stop block 3 on the needle bar can be fixed relatively arbitrarily relative to the elastic pad. Even if the operator fixes the position of the upper stop block 3 relatively arbitrarily, the needle bar can still be pressed to the predetermined position by the selected longer spring 4.

[0019] The preset position described in this utility model satisfies the requirement that the position of the needle bar 2 in its natural idle state is level with or slightly lower than the upper stop position of the needle bar 2 during its upward movement, and does not affect the position for cooperation with the needle bar drive block.

[0020] For ease of installation, the spring 4 is a helical spring 4.

[0021] The needle bar holder body 1 is provided with a mounting hole 12 for mounting a spring 4, and / or a mounting hole 42 for mounting a spring 4 is provided at the upper stop.

[0022] As a preferred embodiment of this invention, the spring 4 is disposed at a corresponding position on the needle bar holder. A stop block 41 is provided on the spring 4. The stop block 41 is preferably a stop post that can mate with the mounting hole 42.

[0023] As a further preferred embodiment, the inner frame upper stop surface 11 of the needle bar holder body 1 is provided with mounting holes 42 at the corresponding positions of the upper stop block 3, the spring 4 is disposed in the mounting holes 42, and the spring 4 is provided with a stop block 41 that stops the upper stop block 3 at a preset position.

Claims

1. A needle bar holder, comprising a needle bar holder body and at least one needle bar mounted on the needle bar holder body, wherein each needle bar is provided with an upper stop block, and the upper stop block is provided with a fixing structure fixed to the needle bar, characterized in that: The needle bar holder body is provided with a spring that stops the upper stop block at a preset position, or / and the upper stop block is provided with a spring that cooperates with the needle bar holder body and stops the upper stop block at a preset position; the preset position satisfies that the position where the needle bar stops in its natural idle state is level with or slightly lower than the upper stop position of the needle bar when it moves upward, and does not affect the position that cooperates with the needle bar drive block.

2. The needle bar holder as described in claim 1, characterized in that: The spring in question is a helical spring.

3. The needle bar holder as described in claim 2, characterized in that: The needle bar holder body is provided with mounting holes for installing springs, and / or the upper stop is provided with mounting holes for installing springs.

4. The needle bar holder as described in claim 1, characterized in that: The spring is equipped with a stop block.

5. The needle bar holder as described in claim 1, characterized in that: The spring is located at the corresponding position on the needle bar holder.

6. The needle bar holder as described in claim 1, characterized in that: The inner frame of the needle bar holder body has mounting holes at the corresponding positions of the upper stop surface and the upper stop block. The spring is installed in the mounting holes and has a stop block at a preset position to stop the upper stop block.

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