A self-tightening and anti-loosening gear and rack mechanism

Abstract

This utility model discloses a self-tightening, anti-loosening gear and rack mechanism, including a gear disk, a rolling rack, and a gear support. The gear disk is mounted on the gear support via a central column and has an adjusting spring and a stop pin inside. A rolling wheel is mounted at the bottom of the rolling rack, and a rack end shaft is provided at its tail end. When the rolling rack moves, the adjusting spring generates an axial preload to keep the gear disk and rolling rack tightly meshed. The outer gear ring of the gear disk has an end shaft indicator groove that cooperates with and limits the movement of the rack end shaft. This utility model effectively prevents gear loosening through a spring self-tightening mechanism and reduces friction through the rolling wheel. It has advantages such as high transmission accuracy, good anti-loosening performance, and reliable structure, and is suitable for mechanical equipment requiring high-precision transmission.

Description

Technical Field

[0001] This utility model belongs to the field of gear and rack transmission technology, and specifically relates to a self-tightening and anti-loosening gear and rack mechanism. Background Technology

[0002] In existing gear and rack transmission mechanisms, due to external forces such as vibration and impact, the gear and rack are prone to loosening, which can lead to a decrease in transmission accuracy and may even cause safety accidents.

[0003] Most existing gear and rack self-tightening structures are quite complex. For example, the patent with publication number CNCN101260759A describes a gear and rack transmission automatic locking mechanism. One end of the lock is connected to the lower end of the upper connecting rod, the upper end of the upper connecting rod extends out of the housing, and the other end of the lock is connected to the mechanism frame. The rack on the rack rod meshes with the gear, the gear meshes with the handle rack, and the energy storage elastic element is connected to the energy storage elastic element connecting rod. The lower end of the energy storage elastic element is fixed to the housing, thereby achieving automatic locking of the filing cabinet door. However, this structure is complex and difficult to maintain. Utility Model Content

[0004] The purpose of this invention is to address the aforementioned problems in the prior art by providing a self-tightening and anti-loosening gear and rack mechanism.

[0005] The objective of this utility model can be achieved through the following technical solution: A self-tightening and anti-loosening gear and rack mechanism, comprising a gear disk, a rolling rack, and a gear support:

[0006] The gear disk is generally tray-shaped with a central hole. The outer gear ring teeth precisely mesh with the rolling rack teeth to convert rotational motion into linear motion. An adjusting spring and an intercepting pin are installed inside the gear disk. The adjusting spring is generally spiral-shaped with its two ends bent to form a spring head ring and a spring tail hook, respectively.

[0007] The upper end of the gear bracket is used to support the gear disk. A horizontal hollow central column is formed on the bracket plate. A fixing groove is circumferentially opened on the outer wall of the central column. During installation, the central column passes through the central hole of the gear disk. The gear disk is fastened to the gear bracket by engaging the gear retaining ring in the fixing groove. A spring outlet is also opened axially on the central column. The spring head ring of the adjusting spring is inserted into the cavity of the central column and extends out from the spring outlet to spirally coil. The spring tail hook of the adjusting spring is hooked on the intercepting pin.

[0008] The bottom of the gear bracket has a bracket base on which a rolling rack is placed. The top of the rolling rack is inclined upward from the tail end. When the rolling rack moves to one side of the rack end shaft, the adjusting spring is compressed and applies an axial preload to the gear disk, thereby making the gear disk and the rolling gear mesh tightly to achieve self-tightening and anti-loosening.

[0009] In the aforementioned self-tightening and anti-loosening gear rack mechanism, a semi-arc-shaped end shaft indicator groove is formed on the outer gear ring of the gear disk, and a rack end shaft is provided at the tail end of the rolling rack. When the rolling rack moves away from the rack end shaft, the end shaft indicator groove will connect and cooperate with the rack end shaft at the tail end and perform limiting and fixing to prevent the gear disk from separating from the rolling rack.

[0010] In the aforementioned self-tightening and anti-loosening gear and rack mechanism, the bottom of the gear disk is provided with several material reduction holes evenly distributed around the central hole, which reduces weight while ensuring strength.

[0011] In the aforementioned self-tightening and anti-loosening gear rack mechanism, a rolling wheel is installed at the bottom of the rolling rack. When the rolling wheel rolls on the support base, it can reduce friction and improve the smoothness of transmission.

[0012] In the aforementioned self-tightening and anti-loosening gear rack mechanism, a bracket fixing seat with bolt holes is formed on the lower rear side of the bracket base for connecting it to other mechanisms.

[0013] Compared with the prior art, the self-tightening and anti-loosening gear rack mechanism provided by this utility model has the following advantages: it effectively prevents the axial loosening of the gear disk by adjusting the spring, thereby improving the transmission stability; the precise meshing of the rolling rack and the gear disk, combined with the stable support structure, ensures that the motion accuracy is not affected by vibration; the synergistic effect of the self-locking mechanism and the rigid support structure enables the mechanism to maintain stable operation under impact or vibration conditions, and the structure has high reliability. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of the self-tightening and anti-loosening gear and rack mechanism;

[0015] Figure 2 This is a partial exploded view of the self-tightening and anti-loosening gear and rack mechanism;

[0016] In the above figure, 100 is the gear disk; 101 is the center hole; 102 is the material reduction hole; 103 is the end shaft indicator groove; 110 is the adjusting spring; 111 is the spring head ring; 112 is the spring tail hook; 120 is the gear retaining ring; 130 is the intercepting pin; 200 is the rolling rack; 210 is the rolling wheel; 220 is the rack end shaft; 300 is the gear bracket; 310 is the bracket base; 320 is the center column; 321 is the fixing slot; 322 is the spring outlet; and 330 is the bracket fixing seat. Detailed Implementation

[0017] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0018] like Figures 1 to 2 As shown, this self-tightening and anti-loosening gear and rack mechanism mainly includes three core components: gear disk 100, rolling rack 200, and gear support 300.

[0019] The gear disk 100 adopts a tray-type structure design with a central hole 101. The tooth profile of the outer gear ring is precisely matched with that of the rolling rack 200. An adjusting spring 110 and an intercepting pin 130 are installed inside the gear disk 100. The adjusting spring 110 has a helical design, with a spring head ring 111 and a spring tail hook 112 at each end. Material reduction holes 102 are evenly distributed at the bottom of the gear disk 100, effectively reducing weight while ensuring structural strength.

[0020] The gear support 300 has a hollow central column 320 on its upper part. A fixing groove 321 and a spring outlet 322 are formed on the outer wall of the central column 320. During installation, the central column 320 passes through the central hole 101 of the gear disk 100, and the gear retaining ring 120 is engaged in the fixing groove 321 for fixation. The spring head ring 111 of the adjusting spring 110 is engaged in the inner cavity of the central column 320, extends out from the spring outlet 322, and spirally coils. The spring tail hook 112 is hooked onto the intercepting pin 130. A support fixing seat 330 with bolt holes is formed on the rear lower end of the support base 300 for connecting it to other mechanisms.

[0021] A rolling rack 200 is mounted on a support base 310 at the bottom of the gear bracket 300. A rolling wheel 210 is mounted on its bottom, and a rack end shaft 220 is located at its tail end. Its top is slightly inclined upwards from the tail end. When the rolling rack 200 moves towards the rack end shaft 220, the adjusting spring 110 is compressed, generating an axial preload on the gear disk 100, ensuring that the gear disk 100 and the rolling rack 200 remain tightly meshed. The outer gear ring of the gear disk 100 has an end shaft indicator groove 103, which, in conjunction with the rack end shaft 220, prevents the gear disk 100 from disengaging from the rolling rack 200.

[0022] The working principle of this utility model is as follows: the power drives the gear disk 100 to rotate, which in turn drives the rolling rack 200 to move in a straight line. The adjusting spring 110 automatically compensates for the axial displacement of the gear disk 100 through preload, effectively preventing loosening; the rolling wheel 210 significantly reduces frictional resistance, ensuring smooth transmission.

[0023] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

[0024] Although this document uses a variety of terms, the possibility of using other terms is not excluded. These terms are used merely for the convenience of describing and explaining the essence of this invention; interpreting them as any additional limitation would contradict the spirit of this invention.

Claims

1. A self-tightening, anti-loosening gear and rack mechanism, comprising a gear disk (100), a rolling rack (200), and a gear support (300); characterized in that, The gear disk (100) is generally tray-shaped, with a central hole (101) in the center. The outer gear ring teeth precisely mesh with the rolling rack (200) teeth. An adjusting spring (110) and an intercepting pin (130) are provided inside the gear disk (100). The adjusting spring (110) is generally spiral-shaped, with its two ends bent to form a spring head ring (111) and a spring tail hook (112). The upper end of the gear bracket (300) is used to support the gear disk (100). A horizontal hollow central column (320) is formed on the bracket plate. A fixing groove (321) is circumferentially opened on the outer side wall of the central column (320). During installation, the central column (320) passes through the central hole (101) of the gear disk (100). The gear disk (100) is fastened to the gear bracket (300) by engaging the gear retainer (120) in the fixing groove (321). A spring outlet (322) is also opened axially on the central column (320). The spring head ring (111) of the adjusting spring (110) is inserted into the cavity of the central column (320) and extends out from the spring outlet (322) to spirally coil. The spring tail hook (112) of the adjusting spring (110) is hooked on the intercepting pin (130). The bottom of the gear bracket (300) is formed with a bracket base (310), on which a rolling rack (200) is placed. The top of the rolling rack (200) is inclined upward from the tail end. When the rolling rack (200) moves to the side of the rack end shaft (220), the adjusting spring (110) is squeezed and applies an axial preload to the gear disk (100), thereby making the gear disk (100) mesh tightly with the rolling gear to achieve self-tightening and anti-loosening.

2. The self-tightening and anti-loosening gear and rack mechanism according to claim 1, characterized in that, A semi-circular end shaft indicator groove (103) is formed on the outer gear ring of the gear disk (100). The tail end of the rolling rack (200) is provided with a rack end shaft (220). When the rolling rack (200) moves away from the rack end shaft (220), the end shaft indicator groove (103) will connect and cooperate with the rack end shaft (220) at the tail end and perform limiting and fixing to prevent the gear disk (100) from separating from the rolling rack (200).

3. The self-tightening and anti-loosening gear and rack mechanism according to claim 1, characterized in that, The bottom of the gear disk (100) is provided with a plurality of material reduction holes (102) evenly distributed around the central hole (101).

4. The self-tightening and anti-loosening gear and rack mechanism according to claim 1, characterized in that, The bottom of the rolling rack (200) is equipped with a rolling wheel (210). When the rolling wheel (210) rolls on the support base (310), it can reduce friction and improve the smoothness of transmission.

5. A self-tightening, anti-loosening gear and rack mechanism according to claim 1, characterized in that, The lower rear side of the bracket base (310) has a bracket fixing seat (330) with bolt holes for connecting it to other mechanisms.

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